Этот сайт использует файлы cookies. Продолжая просмотр страниц сайта, вы соглашаетесь с использованием файлов cookies. Если вам нужна дополнительная информация, пожалуйста, посетите страницу Политика файлов Cookie

Прямой эфир

Русский

English

Войти / Регистрация

Cryptocurrencies: 10413 / Markets: 103521

Market Cap: $ 2 709 259 521 143 / 24h Vol: $ 77 285 271 109 / BTC Dominance: 61.475891184396%

Н Новости

Дистанционная фотоплетизмография: теория и практика

Добрый день! Меня зовут Иван, я закончил медицинский институт как врач‑терапевт и в настоящее время учусь на 2-м курсе магистратуры МФТИ по направлению «Прикладной анализ данных в медицине». Я прохожу стажировку в Центре искусственного интеллекта в медицине в Лаборатории искусственного интеллекта в Сбере и хочу рассказать о своей работе в области дистанционной фотоплетизмографии. Настоящее исследование продолжает цикл статей о дистанционной фотоплетизмографии в Лаборатории искусственного интеллекта в Сбере [44].

Фотоплетизмография (ФПГ) — это диагностический метод, который позволяет оценить изменения объема крови в микрососудах из‑за сердечных сокращений и получить таким образом информацию о работе сердца и о состоянии сосудов.

Фотоплетизмография находит широкое применение в клинической практике — она лежит в основе пульсоксиметрии (измерении уровня кислорода в крови), используется для подсчета частоты дыхательных движений, оценки тонуса и жесткости сосудистой стенки при артериальной гипертонии, ишемической болезни сердца и заболеваниях периферических сосудов. Активно исследуется применение фотоплетизмографии для предсказания риска фибрилляции предсердий, сахарного диабета, обструктивного апноэ во сне и других заболеваний. Таким образом, фотоплетизмография может использоваться как для диагностики, так и для мониторинга различных витальных показателей [39, 40].

Классическая контактная фотоплетизмография основана на оптической денситометрии — определении оптической плотности ткани. Участок кожи, например, на пальце, освещается красным и инфракрасным светом, который после отражения или прохождения через ткань регистрируется сенсором. При этом наблюдаются пульсации света, отражающие пульсирующий характер кровотока в микрососудах. В зависимости от расположения источника и приемника светового сигнала различают два типа фотоплетизмографических сенсоров: 1) «на пропускание» (трансмиссионные сенсоры), когда источник и приемник расположены с противоположных сторон от объекта исследования, например, пальца; 2) «на отражение» (рефлективный сенсоры), когда источник и приемник расположены с одной стороны от объекта исследований (рис. 1) [2]. Пример получаемого пульсового сигнала приведен на рис. 2.

Рисунок 1 [40]. Контактная фотоплетизмография бывает трансмиссивная (а) и рефлективная (б).

Рисунок 2. Пример пульсового сигнала, получаемого при контактной фотоплетизмографии. Данные взяты из датасета UBFC-rPPG [37].

В последние годы в качестве альтернативы контактной фотоплетизмографии активно развивается дистанционная фотоплетизмография. Она основана на том, что изменение кровенаполнения мелких сосудов влияет на процесс отражения света [11]. Отраженный свет записывается видео‑камерой и анализ полученного видео позволяет выделить искомый пульсовой сигнал. При этом не требуется использование каких‑либо специальных сенсоров как в классической ФПГ.

Мы начнем с описания физиологических основ и алгоритмов дистанционной фотоплетизмографии, после чего обсудим ряд технических аспектов, влияющих на ее точность и эффективность. Последний раздел статьи посвящен проведенным экспериментам и их результатам.

1. Физиологические и алгоритмические основы дистанционной фотоплетизмографии

Дистанционная фотоплетизмография основана на том, что изменение кровенаполнения сосудов из‑за сердечных сокращений вызывает незначительные изменения окраски кожи. Данные изменения неразличимы для человеческого глаза, но могут быть проанализированы с помощью специальных алгоритмов для получения пульсового сигнала. Последний может быть использован для подсчета частоты сердечных сокращений или оценки вариабельности сердечного ритма.

Таким образом, в дистанционной ФПГ можно выделить несколько стандартных шагов, общих для всех классических алгоритмов обработки сигналов (рис. 3). Сначала на кадрах видеозаписи выбирается область интереса — лицо или его отдельный регион. Далее извлекается RGB‑сигнал — считается среднее значение RGB‑каналов в каждом кадре. Полученный RGB‑сигнал может дополнительно фильтроваться, а далее используется для извлечения пульсового сигнала с помощью одного из алгоритмов. Наконец, пульсовой сигнал фильтруется и на его основе производится подсчет частоты сердечных сокращений.

Рисунок 3. Стандартные этапы при дистанционной фотоплетизмографии: выбор области интереса, подсчет RGB-сигнала, применение одного из алгоритмов для получения пульсового сигнала, его фильтрация и подсчет частоты сердечных сокращений [30].

В настоящее время существует ряд методов обработки сигналов для дистанционной фотоплетизмографии. Мы опишем несколько из них, разберем преимущества и недостатки.

1.1. Метод Green

Цветовые каналы в RGB‑видео несут различную пульсовую информацию. Зеленый G‑канал содержит наиболее выраженный пульсовой компонент, так как (окси)‑гемоглобин в эритроцитах сильнее поглощает зеленый спектр по сравнению с красным. Кроме того, зеленый свет проникает глубже в кожу по сравнению с синим светом и таким образом лучше достигает сосудистого русла [3]. Результаты исследования на нескольких датасетах, показали, что наиболее информативным во всех случаях является G‑канал. На втором месте чаще всего находится B‑канал, а на третьем — R‑канал, однако в отдельных случаях разница между B‑ и R‑каналами не является статистически значимой [1]. Когда объем крови в сосуде возрастает, то большое количество гемоглобина поглощает больше света, поэтому отраженная часть света уменьшается, что и ведет к формированию пульсаций в сигнале [41].

Простейшая идея — это использовать G‑канал как наиболее информативный для определения пульса, что и было предложено в одном из первых методов дистанционной фотоплетизмографии, который получил название Green [3]. Первый этап, стандартный для большинства алгоритмов, состоит в пространственной нормализации. На каждом кадре в видео выбирается область интереса (лицо или отдельная его часть) и считается среднее значение G‑канала среди всех пикселей в данной области. Аналогичным образом проводится усреднение и двух других каналов, в методах, которые их используют. В методе Green сигнал из G‑канала фильтруется, чтобы оставить частоты в диапазоне соответствующем 40–240 ударам в минуту, после чего доминантная частота сигнала используется для оценки частоты пульса.

Однако, при таком подходе не учитывается информация, доступная в других каналах. Поэтому вслед за этим методом был предложен алгоритм G‑R, который дополнительно использует красный канал, вычитая его из зеленого [4]. Вычитание R‑канала оказывает положительный эффект, так как учитывает физиологическую информацию — G‑ и R‑каналы содержат максимальную и минимальную пульсовые амплитуды, поэтому их комбинация максимизирует пульсовой сигнал. Несмотря на свою простоту, данный метод показывает достаточно хорошие результаты (сравнение с другими методами приведено в разделе 3 в табл. 2).

1.2. Дихроматическая модель

Видимые изменения окраски кожи происходят согласно физиологическим особенностям отражения света от кожи, поэтому для лучшего понимания алгоритмов дистанционной фотоплетизмографии нам необходимо рассмотреть механизмы данного процесса. Согласно дихроматической модели при падении света на кожу одна его часть отражается непосредственно от поверхности кожи (зеркальное отражение), а другая — проникает в подлежащие ткани, где частично рассеивается, а частично, достигнув кровеносных сосудов, — отражается от них (диффузное отражение) [5, 11]. Описанный процесс схематично проиллюстрирован на рис. 4. Очевидно, что только диффузно отраженная часть светового потока содержит информацию о кровенаполнении сосудов и может использоваться для анализа пульса.

Рисунок 4. При падении света на кожу одна его часть отражается непосредственно от поверхности кожи (зеркальное отражение – specular reflection), а другая – проникает в подлежащие ткани, где частично рассеивается, а частично, достигнув кровеносных сосудов, – отражается от них (диффузное отражение – diffuse reflection) [5].

Световой поток, падающий на сенсор RGB-камеры, может быть представлен в виде зависимой от времени {(t)} функции:

$\begin{equation} C(t)=I_0 \cdot (1+i(t)) \cdot (u_c \cdot c_0 + u_s \cdot s(t) + u_p \cdot p(t)) \tag{1} \end{equation} ,$

где {C(t)} — это среднее значение RGB‑каналов в области интереса, {I(t)} — интенсивность светового потока, которая модулируется двумя компонентами — зеркальным отражением ${v_s(t)}$ и диффузным отражением ${v_d(t)}$ . Последний компонент ${v_n(t)}$ — это шумовой сигнал сенсора камеры. Однако мы делаем допущение, что благодаря относительному большому размеру области интереса шум камеры ${v_n(t)}$ является незначимым и может не учитываться. В отдельных областях зеркальное отражение может преобладать над диффузным. Но мы также делаем допущение, что благодаря эффективному выбору области интереса участки с доминирующим зеркальным отражением не рассматриваются.

Зеркальное отражение ${v_s(t)}$ изменяется при движениях, так как последние влияют на геометрические отношения между источником света, поверхностью кожи и камерой. Таким образом,

$\begin{equation} v_s(t)=u_s \cdot (s_0 + s(t)) \tag{2} \end{equation} ,$

где ${ u_s}$ – это спектр света, ${s_0}$ – стационарный компонент, а ${s_t}$ – компонент, зависимый от времени, а точнее говоря – от движений.

Диффузное отражение v_d(t) зависит от поглощения и рассеивания света в тканях под кожей и определяется в первую очередь постоянным уровнем меланина – пигмента, обуславливающим цвет кожи, и зависимым от времени (от кровенаполнения сосудов) уровнем гемоглобина. Таким образом,

$\begin{equation} v_d(t)=u_d \cdot d_0 + u_p \cdot p(t) \tag{3} \end{equation} ,$

где ${u_d}$ — постоянный компонент цвета кожи, d_0 — постоянный коэффициент отражения, ${u_p}$ — относительная сила пульсового сигнала в RGB каналах, а {p(t)} — непосредственно пульсовой сигнал.

Подставив {(2)} и {(3)} в {(1)} получим:

$\begin{equation} C(t)=I(t) \cdot (u_s \cdot (s_0 + s(t)) + u_d \cdot d_0 + u_p \cdot p(t)) \tag{4} \end{equation} ,$

Постоянные компоненты зеркального и диффузного отражений могут быть объединены в единый компонент:

$\begin{equation} u_c \cdot c_0 = u_s \cdot s_0 + u_d \cdot d_0 \tag{5} \end{equation} ,$

где ${u_c}$ – цвет отражаемого светового потока, а ${c_0}$ – сила отражения. Подставим {(5)} в {(4)} , получим:

$\begin{equation} C(t)=I_0 \cdot (1+i(t)) \cdot (u_c \cdot c_0 + u_s \cdot s(t) + u_p \cdot p(t)) \tag{6} \end{equation} ,$

где яркость светового потока {I(t)} также представлена в виде постоянного I_0 и зависимого от времени $I_0 \cdot i(t)$ компонентов.

В сигнале, получаемом из светового потока, условно различают две части – пульсирующую переменную часть {AC} , которая зависит от пульса, и непульсирующую медленно изменяющуюся часть {DC} , которая определяется медленным изменением кровенаполнения венозных и артериальных сосудов, а также изменением объема межклеточной жидкости и другими физиологическими процессами, влияющими на оптические свойства биологической ткани [2]. Раскрыв скобки в {(6)} , можно упростить выражение, так как компонент {AC} на порядок меньше компонента {DC} , и их произведения ${s(t) \cdot i(t)}$ и ${ p(t) \cdot i(t)}$ могут быть отброшены:

$\begin{equation} \begin{aligned} C(t) &= u_c \cdot I_0 \cdot c_0 + u_s \cdot I_0 \cdot s(t) + u_p \cdot I_0 \cdot p(t) + \\ &\quad + u_c \cdot I_0 \cdot c_0 \cdot i(t) + u_s \cdot I_0 \cdot s(t) \cdot i(t) + u_p \cdot I_0 \cdot p(t) \cdot i(t) \\ &\approx u_c \cdot I_0 \cdot c_0 + u_c \cdot I_0 \cdot i(t) + u_s \cdot I_0 \cdot s(t) + u_p \cdot I_0 \cdot p(t). \end{aligned} \tag{7} \end{equation}$

Для наглядности еще раз отметим роль отдельных компонентов в {(7)} :

$u_c \cdot I_0 \cdot c_0$ – это постоянная интенсивность света;

$u_c \cdot I_0 \cdot c_0 \cdot i(t)$ – это изменения интенсивности света, которые вызваны, главным образом, движениями;

$u_s \cdot I_0 \cdot s(t)$ – это компонент, связанный с зеркальным отражением света от поверхности кожи;

$u_p \cdot I_0 \cdot p(t)$ – это искомый пульсовой сигнал.

Таким образом, {C(t)} – это линейная комбинация сигналов, и ключевая задача алгоритма дистанционной фотоплетизмографии состоит в извлечении пульсового сигнала из {(7)} . Существующие методы можно разделить на две категории – основанные на слепом разделении сигнала (методы главных и независимых компонент) и учитывающие физиологические особенности процесса светоотражения. Мы начнем с рассмотрения алгоритма CHROM, который предоставит интуитивно понятную мотивацию для ряда ключевых концепций, используемых и в других алгоритмах.

1.3. Метод CHROM

Изменение амплитуды пульсового сигнала в каждом из RGB-каналов зависит от интенсивности источника света [12, 11]. Для того, чтобы устранить постоянное влияние интенсивности и цвета источника света на пульсовой сигнал следует выполнить временную нормализацию каждого из RGB-каналов – разделить сигнал ${C_i(t)}$ в каждом из каналов на среднее значение сигнала в канале за время ${\mu (C_i(t))}$ :

$\begin{equation} C_ni(t) = \frac {C_i(t)} { \mu (C_i(t))} \tag{8} \end{equation} .$

Нормализация во времени является одним из ключевых этапов алгоритмов, которые основаны на работе в нормализованном во времени RGB-пространстве. К таким алгоритмам относятся CHROM и POS.

Однако временная нормализация не может устранить влияние изменений интенсивности светового потока за период, во время которого проводится нормализации [12]. Подобные изменения обычно возникают из-за движений поверхности кожи относительно источника света. Предположив, что изменения интенсивности одинаковы для всех RGB-каналов, можно устранить их, взяв отношение двух нормализованных во времени RGB-каналов. Так как, как уже было отмечено, G- и R-каналы содержат максимальную и минимальную пульсовые амплитуды, можно взять их отношение, получив пульсовой сигнал, на который устранено влияние движений:

$\begin{equation} S = \frac {G_n(t)} { R_n(t)} -1 \tag{9} \end{equation} .$

Единица вычитается для приведения сигнала к виду, где среднее значение равно нулю. Недавно были также предложены методы GB и GRGB, в которых вместо отношения ${G_n(t) / R_n(t)}$ используются соответственно ${G_n(t) / B_n(t)}$ и ${G_n(t) / R_n(t)} + {G_n(t) / B_n(t)}$ [6].

Отношение двух каналов позволяет устранить влияние изменений интенсивности, но не может убрать влияние зеркального отражения от поверхности кожи. Отметим, что, в то время как диффузный компонент, несущий пульсовой сигнал, различен для RGB-каналов из-за особенностей абсорбции света тканями, зеркальный компонент, несущий шум, является одинаковым во всех RGB-каналах.

При использовании источника белого света зеркальный компонент привносит одинаковую фракцию белого света, которую можно устранить, используя разницу между цветовыми каналами, то есть цветность (chrominance). Из трех RGB-каналов можно получить два ортогональных сигнала цветности:

$\begin{equation} X=R-G, \\ Y=0,5R + 0,5G - B \tag{10} \end{equation} .$

При этом изменения, вызванные пульсовой волной, будут различаться для них, а изменения, вызванные движениями, будут одинаковыми. Используя описанный ранее подход {(9)}, можно взять их отношение, чтобы устранить влияние движений, получив пульсовой сигнал:

$\begin{equation} S = \frac {X_n} { Y_n } -1 = \frac {R-G} {0,5R+0,5G-B } -1 \tag{11} \end{equation} .$

Еще раз отметим смысл каждого из данных этапов:

1) временная нормализация {(8)} позволяет устранить влияние постоянного уровня интенсивности света ${(u_c \cdot I_0 \cdot c_0)}$ на пульсовой сигнал;

2) разница между цветовыми каналами позволяет устранить зеркальное отражение ${(u_s \cdot I_0 \cdot s(t))}$ , одинаковое во всех RGB каналах, получив в результате два сигнала цветности {(10)} ;

3) отношение двух сигналов цветности в {(11)} позволяет устранить влияние изменений интенсивности света из-за движений ${(u_c \cdot I_0 \cdot c_0 \cdot i(t))}$ .

Данный подход, однако, справедлив только при использовании источника белого света. Под источником света другого цвета алгоритм будет работать хуже. Для устранения означенного недостатка можно выполнить стандартизацию цвета кожи. В ходе эксперимента было установлено, что стандартизированный цвет кожи под источником белого света почти одинаков у всех людей:

$\begin{equation} u_{skin} = \frac {[R,G,B]} { \sqrt{R^2 + G^2 + B^2} } \tag{12} \end{equation} .$

Стандартизированный цвет кожи, конечно же, отличается в зависимости от цветотипа кожи (уровня меланина), однако различия невелики и потому пренебрежимы. Хотя более высокий уровень меланина усиливает абсолютное поглощение света кожей, поглощение света в разных RGB-каналах относительно друг друга остается почти одинаковым. Поэтому стандартизированный цвет кожи под источником белого света почти одинаков у всех людей [11].

Таким образом, для того чтобы выполнить поправку для источника света другого цвета, необходимо выполнить временную нормализацию каждого RGB-канала, используя {(8)} , а затем умножить на стандартизированный вектор цвета кожи {(12)} :

$\begin{equation} R_s=0,7682R_n,G_s=0,5121G_n,B_s=0,3841B_n \tag{13} \end{equation}.$

Далее подставим {(13)} в {(11)} :

$\begin{equation} S = \frac {X_s} { Y_s} -1 \tag{14} \end{equation} .$

$\begin{equation} \begin{aligned} X_s &= \frac{R_s - G_s}{0,7682 - 0,5121} = 3R_n - 2G_n, \\ Y_s &= \frac{R_s + G_s - 2B_s}{0,7682 + 0,5121 - 2 \cdot 0,3841} = 1,5R_n + G_n - 1,5B_n \end{aligned} \tag{15} \end{equation}$

Отметим, что изначально авторы в {(10)} выбрали {Y} как {Y=0,5R+0,5G-B} , однако в { (15) } , чтобы убрать дробные коэффициенты {0,5} , используют {Y=R+G-2B} . Очевидно, что результат будет тем же самым. Также отметим, что в {(10) } {X} представлен как {X=R-G} , a {Y} – как {Y=0,5R+0,5G-B} . Однако в { (15) } мы дополнительно добавляем знаменатели, для того чтобы вклад каждого из цветовых каналов имел корректный вес, соответствующий таковому при источнике света белого цвета. Мы можем расписать { (15) } чуть подробнее, чтобы увидеть, как получаются итоговые коэффициенты:

$\begin{equation} \begin{aligned} X_s &= \frac{R_s - G_s}{0{,}7682 - 0{,}5121} = \frac{0{,}7682R_n - 0{,}5121G_n}{0{,}7682 - 0{,}5121} \\ &= \frac{0{,}7682R_n - 0{,}5121G_n}{0{,}2561} \approx 2{,}999R_n - 1{,}999G_n \approx 3R_n - 2G_n. \end{aligned} \tag{16} \end{equation}$

Аналогичным образом:

$\begin{equation} \begin{aligned} Y_s & = \frac{R_s + G_s - 2B_s}{0,7682 + 0,5121 - 2 \cdot 0,3841} = \frac{0,7682R_n + 0,5121G_n - 2 \cdot 0,3841B_n}{0,7682 + 0,5121 - 2 \cdot 0,3841} \\ & = \frac{0,7682R_n + 0,5121G_n - 0,7682B_n}{0,7682 + 0,5121 - 0,7682} = \frac{0,7682R_n + 0,5121G_n - 0,7682B_n}{0,5121} \\ & \approx 1,500R_n + G_n - 1,500B_n \approx 1,5R_n + G_n - 1,5B_n. \end{aligned} \tag{17} \end{equation}$

Далее мы можем упростить {(14)} , используя свойства логарифмов и серию Тейлора:

$\begin{equation} log(1+s) = log(\frac {X_s} { Y_s} ) = log(X_s) - log(Y_s) \tag{18} \end{equation} ,$

$\begin{equation} log(x) = (x-1) - \frac {(x-1)^2} { 2)} + \frac {(x-1)^3} { 3)} -... \tag{19} \end{equation}$

Так как все аргументы логарифмов в {(18)} близки к единице, то

$\begin{equation} S≈X_s-Y_s=3R_n-2G_n-(1,5R_n+G_n-1,5B_n )=1,5R_n-3G_n+1,5B_n \tag{20} \end{equation} .$

Наконец, отметим, что амплитуда пульса {S} может быть сравнительно маленькой относительно ${X_s}$ и ${Y_s}$ . Если стандартизация цвета кожи окажется не совсем точной, то ${X_s}$ и ${Y_s}$ будут иметь разные амплитуды. Для коррекции можно использовать следующий механизм, называемый альфа-тюнингом:

$\begin{equation} S=X_s-αY_s,α= \frac {σ(X_s )} {σ(Y_s )} \tag{21} \end{equation} .$

Он обусловлен тем, что пульсовой сигнал находится в противофазе между ${X_s}$ и ${Y_s}$ , а искажения из-за изменений интенсивности светового потока при движениях находятся в фазе между ${X_s}$ и ${Y_s}$ . Таким образом, когда доминирует пульсовой компонент, то ${S_1}$ и ${S_2}$ находятся в противофазе, и поэтому их разность помогает усилить пульсовой сигнал. Если же доминируют искажения, обусловленные движениями, то разность их двух сигналов, находящихся в фазе, позволяет устранить данные искажения. Полученный алгоритм {(21)} основан на использовании двух сигналов цветности (chrominance), поэтому называется CHROM [12].

1.4. Методы слепого разделения сигнала

Метод главных компонент (PCA) и метод независимых компонент (ICA) [13, 14] позволяют разделить RGB сигнал {C(t)} на отдельные компоненты {Y(t)} , соответствующие интенсивности света, зеркальному отражению от кожи и диффузному отражению, несущему искомый пульсовой сигнал, с помощью матрицы {W} :

$\begin{equation} Y(t)=W·C(t) \tag{22} \end{equation} .$

Хотя алгоритмы слепого разделения сигналов на первый взгляд сильно отличаются от метода CHROM, отметим, что все они направлены на выделение пульсового сигнала как некой линейной комбинации сигналов из трех RGB-каналов. CHROM использует для этого постоянные во всех случаях коэффициенты в {(20)} :

$\begin{equation} S≈1,5R_n-3G_n+1,5B_n \tag{20} \end{equation} .$

a PCA и ICA – линейную комбинацию, определенную на основе {(22)} :

$\begin{equation} S=w_1 R_n-w_2 G_n+w_3 B_n \tag{23} \end{equation} .$

Разница между PCA и ICA заключается в их допущениях относительно указанных компонент: PCA предполагает, что они некоррелированные, а ICA – что они независимые. После разложения из {Y(t)} выбирается наиболее периодический сигнал как отражающий пульсовой компонент. Вследствие этого данные методы не работают, если движения человека также являются периодическими (например, при занятиях спортом). Более того другие частотные составляющие (например, дыхание) также затрудняют нахождение {W} [5]. Наконец, для корректного определения пульса необходимо использовать достаточно длинное видео (около 25 с), в то время как CHROM показывает хорошие результаты при работе и на значительно более коротких фрагментах [12]. Таким образом, благодаря учету особенностей физиологии и процесса отражения света CHROM демонстрирует лучшие результаты.

1.5. Временная нормализация и дихроматическая модель

Прежде чем перейти к описанию метода POS отметим более детально роль временной нормализации {(8)} в дихроматической модели {(7)} [5].

$\begin{equation} C(t) \approx u_c \cdot I_0 \cdot c_0 + u_c \cdot I_0 \cdot i(t) + u_s \cdot I_0 \cdot s(t) + u_p \cdot I_0 \cdot p(t) \tag{7}. \end{equation}$

Среднее во времени значение RGB-каналов ${\overline{C}(t) }$ отражает постоянный в течение определенного времени компонент светового потока: ${\overline{C}(t) \approx u_c \cdot I_0 \cdot c_0}$ , и может использоваться для временной нормализации исходного сигнала {C(t)} путем определения матрицы нормализации {N} , такой что

$\begin{equation} N \cdot \overline{C}(t) \approx u_c \cdot I_0 \cdot c_0 = 1. \tag{24} \end{equation}$

Таким образом, получим нормализованный во времени сигнал ${ C_n(t)}$ :

$\begin{equation} \begin{aligned} C_n(t) &= N \cdot C(t) \\ &= N \cdot u_c \cdot I_0 \cdot c_0 + N \cdot u_c \cdot I_0 \cdot c_0 \cdot i(t) + \\ &\quad+ N \cdot u_s \cdot I_0 \cdot s(t) + N \cdot u_p \cdot I_0 \cdot p(t) \\ &= 1 \cdot (1 + i(t)) + N \cdot u_s \cdot I_0 \cdot s(t) + N \cdot u_p \cdot I_0 \cdot p(t) \end{aligned} \tag{25} \end{equation}$

Отметим, что ${1 \cdot (1 + i(t))}$ — это изменение интенсивности света в направлении вектора {1} , который является вектором нормализованного во времени цвета кожи. Это наибольший компонент, изменения которого обусловлены движениями, и он одинаково представлен во всех RGB каналах. ${ N \cdot u_s \cdot I_0 \cdot s(t) }$ — это компонент зеркального отражения, а ${ N \cdot u_p \cdot I_0 \cdot p(t) }$ — это пульсовой сигнал.

Также приведем сигнал к форме, где среднее значение цвета равно нулю:

$\begin{equation} \tilde{C}_n(t) = C_n(t) - 1 = 1 \cdot i(t) + N \cdot u_s \cdot I_0 \cdot s(t) + N \cdot u_p \cdot I_0 \cdot p(t). \tag{26} \end{equation}$

1.6. Метод CHROM и дихроматическая модель

Перед обсуждением метода POS мы сделаем еще одно отступление и обсудим описанный ранее метод CHROM с позиций дихроматической модели [5]. Это позволит в дальнейшем подчеркнуть сходства и различия алгоритмов POS и CHROM, которые очень близки друг другу и отличаются, в сущности, лишь порядком выполняемых операций.

Метод CHROM работает в нормализованном во времени RGB-пространстве и состоит из двух ключевых и одного промежуточного этапов:

1) Проекция в направлении стандартизированного вектора цвета кожи под источником белого света ${u_{skin}}$ , чтобы выполнить поправку для источника света другого цвета. Данный этап является промежуточным так как необходим только в условиях освещения не соответствующих белому свету;

2) Проекция в ортогональную относительно зеркального отражения плоскость, чтобы устранить влияние зеркального отражения. В дихроматической модели {(26)} это – проекция ортогональная компоненту ${ (N \cdot u_s \cdot I_0 \cdot s(t)) }$ ;

3) Альфа-тюнинг для устранения искажений, вызываемых изменением интенсивности светового потока из-за движений.

Следуя описанию в [5], мы можем объединить первые два этапа в умножение на единую проекционную матрицу. На основе вектора ${u_{skin} = [0.7682; 0.5121; 0.3841]}$ создадим диагональную матрицу ${U_{skin}}$ , так что ${U_{skin}^{-1} \cdot u_{skin} = 1}$ :

$\begin{equation} U_{{skin}} = \begin{pmatrix} 0,7682 & 0 & 0 \\ 0 & 0,5121 & 0 \\ 0 & 0 & 0,3841 \end{pmatrix}. \tag{27} \end{equation}$

Матрица ${P_{Chrom}}$ для проекции в ортогональном относительно зеркального отражения направлении — это матрица коэффициентов, используемых для получения двух ортогональных сигнала цветности в {(10)} :

$\begin{equation} P_{{Chrom}} = \begin{pmatrix} 1 & -1 & 0 \\ 0,5 & 0,5 & -1 \end{pmatrix}. \tag{28} \end{equation}$

где строки соответствуют двум сигналам цветности, а столбцы – коэффициентам RGB-каналов. Умножим ${P_{{Chrom}}}$ и ${U_{skin}}$ :

$\begin{equation} \begin{aligned} P_{{Chrom}} \cdot U_{{skin}} &= \begin{pmatrix} 1 & -1 & 0 \\ 0.5 & 0.5 & -1 \end{pmatrix} \begin{pmatrix} 0,7682 & 0 & 0 \\ 0 & 0,5121 & 0 \\ 0 & 0 & 0,3841 \end{pmatrix} \\ &= \begin{pmatrix} 0,7682 & -0,5121 & 0 \\ 0,3841 & 0,2561 & -0.3841 \end{pmatrix}. \end{aligned} \tag{29} \end{equation}$

Чтобы показать эквивалентность полученной проекционной матрицы коэффициентам в оригинальной статье про CHROM выполним несколько простейших преобразований. Разделим каждую строку на наименьший по модулю ненулевой элемент:

$\begin{equation} \begin{aligned} \begin{pmatrix} \frac{0,7682}{0,5121} & -\frac{0,5121}{0,5121} & 0 \\ \frac{0,3841}{0,2561} & \frac{0,2561}{0,2561} & -\frac{0.3841}{0,2561} \end{pmatrix} &= \begin{pmatrix} 1,5 & -1 & 0 \\ 1,5 & 1 & -1,5 \end{pmatrix}. \end{aligned} \tag{30} \end{equation}$

Умножив первую строку на {2} , мы получим матрицу коэффициентов, как и в оригинальной статье:

$\begin{equation} \begin{aligned} \begin{pmatrix} 1,5 \cdot 2 & -1 \cdot 2 & 0 \\ 1,5 & 1 & -1,5 \end{pmatrix} = \begin{pmatrix} 3 & -2 & 0 \\ 1,5 & 1 & -1,5 \end{pmatrix}. \end{aligned} \tag{31} \end{equation}$

Возвращаясь к дихроматической модели {(26)} , рассмотрим результат проекции нормализованного во времени сигнала:

$\begin{equation} \tilde{C}_n(t) = C_n(t) - 1 = 1 \cdot i(t) + N \cdot u_s \cdot I_0 \cdot s(t) + N \cdot u_p \cdot I_0 \cdot p(t), \tag{26} \end{equation}$

$\begin{equation} S(t) = P_{{Chrom}} \cdot U_{{skin}} \cdot \tilde{C}_n(t) \approx P_{{Chrom}} \cdot U_{{skin}} \cdot 1 \cdot i(t) + P_{{Chrom}} \cdot U_{{skin}} \cdot N \cdot u_p \cdot I_0 \cdot p(t). \tag{32} \end{equation}$

Так как проекция является ортогональной относительно зеркального отражения ${(N \cdot u_s \cdot I_0 \cdot s(t))}$ , то ${ P_{{Chrom}} \cdot U_{{skin}} \cdot N \cdot \ u_s \cdot I_0 \cdot s(t)=0}$ , поэтому в {(32)} данный компонент исчезает.

Таким образом, мы получили два сигнала цветности {S(t)} , к которым далее применяется процедура альфа-тюнинга для устранения искажений, вызываемых изменением интенсивности светового потока из-за движений, то есть для устранения компонента ${1 \cdot i(t).}$

1.7. Метод POS

Наконец, мы обсудим State-of-the-art метод POS [5], который, как и CHROM, работает в нормализованном во времени RGB-пространстве, однако выполняет этапы проекции и альфа-тюнинга в обратном порядке.

1) Сначала устраняются искажения, вызываемые изменением интенсивности светового потока из-за движений, с помощью проекции в плоскость, ортогональную относительно направления интенсивности светового потока, то есть в направлении, ортогональном компоненту ${1 \cdot i(t)}$ . Данный компонент соответствует нормализованному оттенку кожи в дихроматической модели {(26)} . Поэтому получающая проекция – это проекция в плоскость, ортогональную нормализованному оттенку кожи. По этой причине метод POS и называется – метод проекции в плоскость, ортогональную оттенку кожи (Plane Orthogonal to Skin). Так как проекция является ортогональной относительно оттенка кожи, то нет необходимости выполнять поправку для источника света другого цвета. По этой причине в методе POS отсутствует этап умножения на стандартизированный вектор цвета кожи ${u_{skin}}$ .

При умножении на проекционную матрицу ${ P_{{POS}}}$ нормализованного во времени сигнала ${\tilde{C}_n(t) }$ получим согласно дихроматической модели {(26)} :

$\begin{equation} \tilde{C}_n(t) = C_n(t) - 1 = 1 \cdot i(t) + N \cdot u_s \cdot I_0 \cdot s(t) + N \cdot u_p \cdot I_0 \cdot p(t), \tag{26} \end{equation}$

$\begin{equation} S(t) = P_{{POS}} \cdot \tilde{C}_n(t) \approx P_{{POS}} \cdot N \cdot u_s \cdot I_0 \cdot s(t) + P_{{POS}} \cdot N \cdot u_p \cdot I_0 \cdot p(t). \tag{33} \end{equation}$

Так как проекция является ортогональной относительно интенсивности светового потока (или иначе говоря, нормализованного оттенка кожи) ${1 \cdot i(t)}$ , то ${ P_{POS} \cdot 1 \cdot i(t) = 0}$ . Поэтому данный компонент исчезает в {(33)} . Каким же образом мы можем выбрать проекционную матрицу ${ P_{POS}}$ ? Зависящий от времени компонент {i(t)} — это скаляр, поэтому он может изменить только длину вектора {1} , не влияя на его направление. Поэтому нам достаточно, чтобы ${ P_{POS} \cdot 1 = 0}$ . Нам также необходимо, чтобы оба компонента в ${ P_{POS}}$ — обозначаемые ${ P_{POS,1}}$ и ${ P_{POS,2}}$ — были ортогональны друг другу. Таким образом, необходимо, чтобы выполнялось два следующих условия:

$\begin{equation} \begin{aligned} &\begin{cases} \mathbf{P}_{{POS}} \cdot 1 = 0 \\ \mathbf{P}_{{POS},1} \cdot \mathbf{P}_{{POS},2} = 0 \end{cases} \end{aligned} \tag{34} \end{equation}$

Однако, каким же образом выбрать коэффициенты для проекционной матрицы? Существует много возможных вариантов. Для ответа на данный вопрос сделаем небольшое отступление.

Ранее в определенных стандартных условиях (галогеновая лампа в качестве источника света и камера UI-2220SE‑C для записи видео) было установлено, что в нормализованном во времени RGB‑пространстве вектор пульсового объема имеет стандартные значения [11]: ${u_{PBV}=[0.33, 0.77, 0.53]}$ . Данный вектор может использоваться напрямую для дальнейшего нахождения пульса, что лежит в основе другого алгоритма дистанционной фотоплетизмографии — PBV (Pulse Blood Volume). Такой подход обеспечивает высокую эффективность даже при существенных движениях человека. Однако его точность зависит от соответствия условий, при которых оценивается пульс, тем стандартным условиям, при которых был подсчитан данный вектор. В методе POS авторы использовали знание данного вектора для того, чтобы приблизительно оценить как выбранная проекционная матрица влияет на силу пульсового сигнала (рис. 5).

Рисунок 5. Нормализованные во времени RGB-сигналы проецируются в плоскость, ортогональную вектору (на рисунке – черная сплошная линия в трехмерном пространстве). Данный вектор указывает в направлении изменений интенсивности светового потока и при этом соответствует нормализованному оттенку кожи. В полученной плоскости показано распределение силы пульсового сигнала (красный / синий цвет соответствуют большой / меньшей силе сигнала). В зависимости от выбора проекционной матрицы проекция пульсового сигнала (вектора пульсового объема ) происходит в различные регионы плоскости. На рисунке приведены проекции для трех различных вариантов оси проекционной матрицы: , и . Их точечный продукт с позволяет оценить силу получаемого пульсового сигнала и соответствует , и . Правая часть рисунка показывает получаемый пульсовой сигнал. Очевидно, что проекция в направлении неудачна – полученный сигнал является зашумленным, что подтверждается низким по модулю значением силы пульсового сигнала [5].

Рисунок 5. Нормализованные во времени RGB-сигналы ${R_n(t), G_n(t), B_n(t)}$ проецируются в плоскость, ортогональную вектору {1}

(на рисунке – черная сплошная линия в трехмерном пространстве). Данный вектор указывает в направлении изменений интенсивности светового потока и при этом соответствует нормализованному оттенку кожи. В полученной плоскости показано распределение силы пульсового сигнала (красный / синий цвет соответствуют большой / меньшей силе сигнала). В зависимости от выбора проекционной матрицы проекция пульсового сигнала (вектора пульсового объема ${u_{PBV}=[0.33, 0.77, 0.53]}$ ) происходит в различные регионы плоскости. На рисунке приведены проекции ${ u_{PBV}}$ для трех различных вариантов оси проекционной матрицы: ${z_1=[-2, 1, 1]}$ , ${z_2=[1, -2, 1]}$ и ${z_3=[1, 1, -2]}$ . Их точечный продукт с ${ u_{PBV}}$ позволяет оценить силу получаемого пульсового сигнала и соответствует {−0,64}

. Правая часть рисунка показывает получаемый пульсовой сигнал. Очевидно, что проекция в направлении ${z_3}$ неудачна – полученный сигнал является зашумленным, что подтверждается низким по модулю значением силы пульсового сигнала {(−0.04)}

[5].

Оказалось, что сила получаемого пульсового сигнала зависит от того, в какую область плоскости, ортогональной оттенку кожи, происходит проекция пульсового сигнала. Поэтому проекционная матрица должна создаваться не произвольно, а с учетом указанных ранее физиологических особенностей — коэффициенты для RGB‑каналов берутся в порядке уменьшения пульсовой амплитуды. Напомним, что наибольшая амплитуда у G‑канала, а наименьшая — у R‑канала. Таким образом, авторы выбрали следующую проекционную матрицу

$\begin{equation} \mathbf{P}_{{POS}} = \begin{pmatrix} \mathbf{P}_{{POS},1} \\ \mathbf{P}_{{POS},2} \end{pmatrix} = \begin{pmatrix} 0 & 1 & -1 \\ -2 & 1 & 1 \end{pmatrix}. \tag{35} \end{equation}$

Мы можем убедиться, что оба условия в {(34)} действительно выполняются:

${P_{POS,1} \cdot 1=[0,1,-1]^T \cdot [1,1,1]=0 \cdot 1+1 \cdot 1-1 \cdot 1=0+1-1=0}$

${P_{POS,2} \cdot 1=[-2,1,1]^T \cdot [1,1,1]=-2 \cdot 1+1 \cdot 1+1 \cdot 1=-2+1+1=0}$

$\begin{equation} P_{POS,1} \cdot P_{POS,2} = [0,1,-1]^T \cdot [-2,1,1]=0 \cdot (-2)+1 \cdot 1-1 \cdot 1=0-1+1=0 \tag{36} \end{equation}$

При умножении на ${P_{POS}}$ полученные компоненты в {S(t)} эквивалентны следующим комбинациям RGB-каналов: ${S_1(t)=G_n-B_n, S_2(t)=-2R_n + G_n +B_n}$ . При этом оба компонента несут положительную пульсовую информацию, поэтому находятся в фазе.

2) Второй, и последний, этап POS — это альфа‑тюнинг для устранения зеркального отражения (напомним, что в методе CHROM альфа‑тюнинг используется для устранения искажений из‑за изменений интенсивности светового потока при движениях). Так как из‑за особенностей проекционной матрицы пульсовые компоненты в ${S_1}$ и ${S_2}$ находятся в фазе, то вместо их вычитания выполняется их сложение:

$\begin{equation} S = S_1 + \alpha S_2, \alpha = \frac{\sigma(S_1)} {\sigma(S_2)} \tag{37} \end{equation}$

Таким образом, когда доминирует пульсовой компонент, то ${S_2}$ и ${S_2}$ находятся в фазе и поэтому их сумма помогает усилить пульсовой сигнал. Если же доминируют находящиеся в противофазе искажения, вызванные зеркальным отражением, то разность их двух сигналов, позволяет устранить данные искажения.

Подводя итог, еще раз подчеркнем сходства и различия методов CHROM и POS в табл. 1. Два этапа — проекция и альфа‑тюнинг — выполняются в обратном порядке в данных методах, что и обуславливает их различия.

Таблица 1. Сравнительный анализ алгоритмов CHROM и POS

CHROM	POS
Временная нормализация для устранения влияния постоянного уровня интенсивности света ${(u_c \cdot I_0 \cdot c_0)}$	Временная нормализация для устранения влияния постоянного уровня интенсивности света ${(u_c \cdot I_0 \cdot c_0)}$
Проекция в направлении стандартизированного вектора цвета кожи под источником белого света	–
Проекция в плоскость, ортогональную зеркальному отражению, – позволяет убрать зеркальное отражение ${(u_s \cdot I_0 \cdot s(t))}$	Проекция в плоскость, ортогональную изменения интенсивности светового потока, –позволяет убрать искажения из-за изменения интенсивности светового потока из-за движений ${(1 \cdot i(t))}$
Альфа-тюнинг для устранения искажений из-за изменения интенсивности светового потока из-за движений ${(1 \cdot i(t))}$	Альфа-тюнинг для устранения зеркального отражения ${(u_s \cdot I_0 \cdot s(t))}$
Пульсовые компоненты находятся в противофазе	Пульсовые компоненты находятся в фазе

1.8. Метод OMIT

В заключение, мы рассмотрим метод OMIT, который был предложен в 2023 г. и основан на трансформации кадров с помощью ортогональной матрицы (Orthogonal Matrix Image Transformation). В данной работе авторы также разработали эффективный алгоритм для выбора области интереса, что позволяют улучшить результаты всех методов дистанционной фотоплетизмографии. Сам же метод OMIT является весьма простым с точки зрения мотивации и исполнения, однако несмотря на это является очень эффективным, в ряде случаев превосходя алгоритм POS.

Метод OMIT основан на разложении матрицы, содержащей средние значения RGB в каждом кадре видео, на ортогональные компоненты с помощью QR‑разложения. Матрица средних значений RGB-каналов в каждом кадре видео имеет форму ${n \times 3}$ , где {n} — число кадров, а {3} — средние значения трех RGB каналов. Данная матрица ${ A \in \mathbb{R}^{n \times 3} }$ может быть разложена на две другие матрицы — ${ Q \in \mathbb{R}^{n \times 3} }$ , которая содержит ортонормальный базис, и верхнюю треугольную матрицу ${ R \in \mathbb{R}^{3 \times 3} }$ , которая содержит коэффициенты, позволяющие представить оригинальную матрицу {A} в базисе {Q} . Таким образом,

$\begin{equation} A = Q R \tag{38}. \end{equation}$

Для эффективного разложения авторы используют метод отражений Хаусхолдера. В полученной матрице {Q} есть 3 столбца, которые образуют ортонормальный базис для исходной матрицы {A} . Ортонормальность означает, что векторы являются ортогональными друг другу и при этом их норма равна единице. Первый столбец ${q_1}$ в матрице {Q} показывает направление наиболее сильных изменений (наибольшей дисперсии) в исходном RGB пространстве. Данные изменения связаны в большинстве случаев с изменением цвета кожи при изменении интенсивности освещения из-за движений. Они также могут быть связаны с шумовым сигналом камеры или другими артефактами. Таким образом, означенное направление связано с факторами, которые затрудняют выявление пульсового сигнала. Для устранения влияния данных факторов выполняется проекция в направлении, ортогональном вектору ${q_1}$ .

Проекционная матрица ${P_{OMIT}}$ вычисляется следующим образом:

$\begin{equation} P_{OMIT} = I - q_1 q_2^T \tag{39}, \end{equation}$

где {I} — это единичная матрица размерностью ${n \times n}$ . Далее выполняется проекция исходной RGB-матрицы {A} и получается новая матрица {Y} :

$\begin{equation} Y = P_{OMIT} A \tag{40}. \end{equation}$

В полученной матрице {Y} первый столбец ${y_1}$ соответствует направлению наиболее сильных изменений, вызванных различным шумом, которые были устранены с помощью проекции. Тогда как второй столбец ${y_2}$ содержит искомый пульсовой сигнал после устранения шумового сигнала. Пульсовой сигнал ${(y_1)}$ после этого, как и в других методах, может быть дополнительно отфильтрован.

2. Технические аспекты дистанционной фотоплетизмографии

Описанные в прошлом разделе алгоритмы позволяют выделить пульсовой сигнал. Однако на их эффективность влияет целый ряд факторов, которые мы и обсудим в настоящей части.

2.1. Выбор области интереса

Первый этап при применении любого из алгоритмов дистанционной ФПГ — это выбор области интереса в видеозаписи [7]. Чаще всего для детекции лица используется алгоритм Виолы‑Джонса, который использует функцию Хаара и интегральное изображение для обнаружения и формирования прямоугольной рамки, ограничивающей лицо. Данный алгоритм отличается высокой скоростью, однако при его применении в области интереса остается часть фона. Более того, движения глаз, рта, блики от очков могут существенным образом влиять на подсчет пульса. Поэтому, исходя из стандартных пропорций человеческого лица, можно обрезать область интереса, исключив фон и глаза, и оставим только центральную часть лица или лоб. Более точный метод для детекции лица имплементирован в Mediapipe Face Mesh и позволяет детектировать 468 точек‑ориентиров на лице (рис. 6) [45]. Последние позволяют точным образом выделить лицо, убрав фон, убрать глаза и область рта или же выбрать отдельные участки, например часть лба или щек. Визуализация различных вариантов выбора области интереса приведена на рис. 7.

Рисунок 6. Mediapipe Face Mesh детектирует 468 точек-ориентиров на лице.

Рисунок 7. Сравнение методов выбора области интереса. Исходный кадр (а); прямоугольная рамка, ограничивающая лицо при применении алгоритма Виолы и Джонса (б); выбор центральной области рамки, чтобы убрать фон (в); закрытие области глаз для устранения влияния бликов (г); выделение лица с помощью точек ориентиров с помощью алгоритма Mediapipe Face Mesh (д); закрытие области глаз и рта с помощью точек ориентиров (е). Здесь и далее кадры взяты из датасета UBFC-rPPG для участников, которые подписали согласие на использование своих данных в статьях [37].

Выбор всего лица в качестве области интереса обеспечивает более стабильную оценку пульсового сигнала — за счет большей площади устраняется влияние шума в отдельных регионах. Однако при этом различные артефакты (очки, борода, усы и т. д.) могут затруднять точную оценку пульса. Более того, нужно отметить, что отдельные регионы лица отличаются друг от друга по интенсивности кровоснабжения и толщине эпидермиса, что напрямую влияет на процесс светоотражения. В связи с этим в литературе весьма популярен выбор лишь отдельных участков на лице. Сравнительный анализ показал, что наиболее перспективными являются области щек и лба, и именно данные регионы достаточно часто используются в качестве областей интереса в различных исследованиях [20].

Для выбора области интереса также возможно применение нейронных сетей, которые сегментируют изображение на отдельные части — фон, кожу, глаза, волосы и т. д. Так, в библиотеке pyVHR [31] используется модель для билатеральной сегментации BiSeNet [32] на основе ResNet18. Однако в ходе наших экспериментов при ее использовании качество сегментации оказалось низким. Более сложная модель SegFormer на основе архитектуры трансформера показала лучшие результаты [33]. Но обработка видео даже с использованием графического процессора в таком случае оказывается весьма медленной. Более того, модель оказалась неспособной убирать мелкие элементы, например бороду или усы, поэтому мы отказались от ее использования. Сравнение сегментации с помощью BiSeNet и SegFormer приведено на рис. 8.

Рисунок 8. Сегментация с помощью нейронных сетей. Исходный кадр (а). Сегментационная маска при использовании BiSeNet (б). Модель выделила фон, волосы, лицо, но оказалась неспособной на сегментацию очков и черт лица. Сегментационная маска при использовании SegFormer имеет значительно лучшее качество (в). Однако при ее применении к исходному кадру все еще сохранились борода и усы, что будет затруднять оценку пульсового сигнала (г).

Значительно более простым, но при этом более эффективным оказался подход на основе адаптивной оценки цвета кожи [34]. На первом этапе происходит выбор области лица, например с помощью алгоритма Виолы и Джонса, что позволяет убрать большое количество пикселей фона, оставив преимущественно пиксели кожи. Далее полученное изображение конвертируется в цветовое пространство HSV. В одном из каналов, происходит разбиение частоты пикселей различных цветов по гистограммам. Так как благодаря выбору области интереса большая часть пикселей фона была убрана, то доминирующим является цвет пикселей кожи, что и позволяет выбрать гистограмму с наибольшим числом пикселей ${hist_{max}}$ . После этого на основе эмпирически подобранного коэффициента ${\alpha}$ выбирается диапазон вокруг данной гистограммы с помощью следующей формулы:

${hist_{max} \pm (\alpha \cdot \frac { hist_{max} }{2})}$

Пиксели, имеющие цвет за пределами данного диапазона, не являются пикселями кожи и поэтому закрашиваются черным цветом. Данный подход отличается вычислительной простотой и позволяет эффективно убрать различные артефакты, затрудняющие оценку пульсового сигнала, — очки, волосы, бороду и усы. Результаты применения данного алгоритма приведены на рис. 9.

Рисунок 9 [34]. Применение метода гистограмм к различным каналам HSV пространства при различных значениях коэффициента ${\alpha}$ .

В ряде работ вместо выбора фиксированных регионов предлагается их динамическая оценка. Так, в [35] авторы предложили отслеживать 7 регионов, разделить каждый из них на небольшие квадраты, для каждого из полученных квадратов посчитать качество сигнала и затем найти пульсовой сигнал как среднее взвешенное всех сигналов, где вес выше у сигналов с лучшим качеством (рис. 10).

Рисунок 10 [35]. Отслеживание 7 регионов (а), их разделение на квадраты (б) и подсчет качества сигнала в каждом из квадратов (в).

Схожий подход был предложен и в [36], однако вместо отслеживания отдельных регионов выполнялось отслеживание всего лица. После оценки отношения сигнала к шуму для каждого из квадратов, выбирались лучшие из них и на их основе подсчитывался пульсовой сигнал (рис. 11).

Рисунок 11 [36]. Разделение кадров области интереса на квадраты (a), подсчет качества сигнала в каждом из квадратов (б) и выбор квадратов с наилучшим качеством.

В [37-38] авторы предложили использовать не фиксированное разбиение на квадраты, а на разделение на суперпиксели, отслеживаемые во времени, — темпоральные суперпиксели. Как и в других работах выбор оптимальных регионов выполнялся с помощью отношения сигнала к шуму (рис. 12).

Рисунок 12 [37]. Разделение кадров (а) на темпоральные суперпиксели (б) и оценка качества сигнала в каждом из квадратов них (в).

Авторы алгоритма OMIT предложили детальный подход для выбора области интереса, который позволил значительно улучшить эффективность всех алгоритмов дистанционной фотоплетизмографии [21]. На первом этапе определяется 85 точек‑ориентиров на лице. Они соединяются между собой, разделяя лицо на треугольники, которые затем проецируются в фиксированные координаты, соответствующие лицу человека во фронтальной проекции (рис. 13). Каждый кадр видео проецируется в данные фиксированные координаты, что позволяет измерять пульсовой сигнал в одних и тех же участках лица.

Рисунок 13 [21]. Определение точек ориентиров на лице (а), триангуляция по данным точкам (б) и проекция полученных треугольников в фиксированные координаты (в).

После проекции в фиксированные координаты производится разделение изображения на сравнительно крупные квадраты, в каждом из которых оценивается качество сигнала. Оценка пульса выполняется на основе квадратов с наилучшим сигналом (рис. 14).

Рисунок 14 [21]. В зависимости от положения лица в кадре и качества освещения выбирается 32 квадрата (сверху) или 20 квадратов (снизу).

Для оценки качества сигнала в каждом из регионов применяется следующий подход:

1) Проводится оценка дисперсии и исключаются регионы с нулевой дисперсией, как не несущие полезной информации.

2) Подсчитывается фрактальная размерность Катца — показатель, который оценивает степень иррегулярности сигнала и остроты пиков и характеризует насколько комплексным является характер сигнала. Далее находят отношение фрактальной размерности сигнала в одном регионе к фрактальной размерности глобального сигнала, полученного со всего лица, и выбираются регионы со значением >0,85 — это позволяет учитывать только те регионы, в которых сигнал имеют сопоставимые характеристики с глобальным сигналом. Таким образом, убираются регионы, несущие преимущественно шумовой сигнал.

3) Выполняется анализ детрендированных флуктуаций, который помогает оценить корреляцию между двумя нестационарными временными рядами. Данный метод позволяет проанализировать корреляцию между сигналом в отдельном регионе и глобальным регионом с помощью ‑экспоненты. Если ${\alpha=0,5}$ , то между временными рядами нет корреляции, если ${0,5< \alpha<1}$ — корреляция положительная, а если ${0< \alpha <0,5}$ , то корреляция отрицательная. Для дальнейшего анализы выбираются только регионы с положительной корреляцией.

После выбора регионов согласно означенным критериям, пульсовые сигналы из них суммируются во временном домене, позволяя получить итоговый пульсовой сигнал.

Наконец, в [22] авторы предложили оригинальный подход, основанный не на определении наилучших областей интереса, а на выборе оптимальных сигналов. Для этого они предложили отслеживать множество небольших регионов, определить в каждом из них пульсовой сигнал, а затем выполнить их спектральную кластеризацию, получив две группы. Сигналы с хорошим качеством имеют приблизительно одинаковый спектр и попадают в один кластер, тогда как сигналы с плохим качеством имеют большую внтуригрупповую (отличаются между собой) и межгрупповую (отличаются от сигналов в хорошем кластере) дисперсию. Итоговый пульсовой сигнал определяется на основе данных из хорошего кластера.

2.2. Применение фильтров

Одним из ключевых этапов является фильтрация полученного сигнала для устранения шума. При этом возможна как фильтрация RGB‑сигнала, так и полученного после применения одного из алгоритмов пульсового сигнала. Последний подход является более распространённым. Прежде всего используются классические фильтры для выбора частот в определенном диапазоне, соответствующем возможной частоте сердечных сокращений — от 40 до 240 ударов в минуту (0,75–3 Гц), а частоты ниже и выше данного диапазона исключаются. Чаще всего применяют фильтр Баттерворта, в отдельных работах — фильтра Чебышева 1 или 2 типа, фильтр Савицкого‑Голея, эллиптический фильтр, вейвлет‑фильтр и др., а также скользящий средний фильтр [9]. Сравнительный анализ указанных фильтров показал, что наиболее оптимальным является фильтр Чебышева 2 типа [9]. Для ЭКГ был предложен фильтр для устранения тренда [10], и он находит свое применение и в области дистанционной ФПГ. Результаты применения отдельных фильтров приведены на рис. 15.

Рисунок 15. Исходный пульсовой сигнал, полученный с помощью метода POS (a). Применение среднего скользящего фильтра для сглаживания сигнала (б). Применение фильтра для устранения тренда (в). Применение фильтра Чебышева 2 типа для сохранения частот в диапазоне 0,7-3 Гц (г).

Был также разработан ряд специальных фильтров, например, фильтр для выбора амплитуды [16]. Последний основан на том факте, относительная пульсовая амплитуда варьируется в определенном диапазоне, который может быть представлен как функция, зависимая от RGB‑каналов. В дальнейшем авторы предложили фильтр для фильтрации частот на основе искажений цветового сигнала [17], основанный на том факте, что пульсовой компонент и компоненты, связанные с изменением интенсивности и зеркальным отражением, имеют разные спектры отражения.

Наконец, существует ряд работ по применению методов машинного и глубокого обучения для фильтрации сигналов, например — использование метода опорных векторов [19] или нейронной сети долгой краткосрочной памяти для восстановления формы полученного пульсового сигнала [18].

Несмотря на большое число предложенных методов, сравнительно мало исследований посвящено сравнению эффективности различных фильтров и их комбинаций. В настоящей работе мы оценили эффективность ряда наиболее распространенных фильтров и их комбинаций для различных методов ФПГ.

2.3. Подсчет частоты сердечных сокращений

После получения пульсового сигнала проводят подсчет частоты сердечных сокращений (ЧСС) [7]. Наиболее распространенным является подход на основе спектрального анализа. Полученный сигнал конвертируется в частотный спектр с помощью быстрого преобразования Фурье или дискретного косинусного преобразования. Распределение спектральной плотности мощности (пример приведен на рис. 16) оценивается как функция частоты с помощью метода Велча в диапазоне от 0,7 до 3 Гц, что соответствует ЧСС от 40 до 180 ударов в минуту. Используемый диапазон в отдельных работах может немного различаться, например от 0,75 до 2,5 Гц (45 — 150 ударов в минуту). Частота с наибольшей мощностью {f} выбирается как соответствующая пульсовому сигналу и используется для подсчета ЧСС: ${ЧСС = 60 \cdot f}$ . Менее распространенным является поход на основе детекции пиков, соответствующих сокращениям сердца в полученном сигнале, и их подсчете.

Рисунок 16. Распределение спектральной плотности мощности для полученного пульсового сигнала (график голубого и оранжевого цвета). Отчетливо видны три доминантные частоты, соответствующие приблизительно 15, 75 и 600 ударам в минуту. После фильтрации частот в диапазоне от 0,75 до 2,5 Гц (от 45 до 150 ударов в минуту) остается только часть спектра (оранжевого цвета, ограничена вертикальными красными линиями), в которой наблюдается только одна доминантная частота, соответствующая 75 ударам в минуту.

2.4. Оценка результатов

Наиболее показательной метрикой является средняя абсолютная ошибка (MAE), показывающая абсолютную разницу между истинной ЧСС, определенной на основе ЭКГ или контактной ФПГ, и ЧСС по данной дистанционной ФПГ, усредненной по числу оцениваемых примеров: ${MAE = 1/N \cdot (|True HR - Estimated HR|)}$ . Во многих работах также применяется отношение сигнала к шуму для оценки информативности получаемого сигнала. Однако данная метрика, хотя и удобна для технического сравнения методов, не позволяет получить представление об их практической эффективности при оценке ЧСС. По этой причине мы сосредоточимся на использовании MAE.

Ключевым вопросом является методика оценки результатов. В одних работах для подсчета ЧСС используется все видео, а в других — видео разделяется на сегменты определенной длины, например по 5 или 10 секунд, и ЧСС определяется отдельно для каждого из сегментов, после чего метрика усредняется по всем сегментам. Более того, сегменты могут не пересекаться (например, 20-секундное видео можно разделить на 2 сегмента по 10 секунд), а могут идти с наложением (например с шагом в 1 секунду — в этом случае получится 11 сегментов). К сожалению, во многих работах авторы не указывают детали, что затрудняет возможность сравнения результатов [8]. Размер временного окна существенным образом влияет не только на оценку ЧСС с помощью дистанционной ФПГ, но и на истинную ЧСС, определяемую на основе ЭКГ или контактной ФПГ. Поэтому во всех случаях рекомендуется явно указывать данные параметры [15].

2.5. Альтернативные цветовые пространства

Для дистанционной ФПГ чаще всего используется RGB‑сигнал. Однако в ряде работ исследовались перспективы других цветовых пространств. Примеры трансформаций приведены на рис. 17. При сравнении 7 цветовых пространств — RGB, HSL, HSV, HIS, XYZ, YUV оказалось, что наиболее информативными были каналы Hue в HSL/HSV/HIS, Y в XYZ, U в YUV и G в RGB [23]. В другой работе при сравнении RGB, HSI, CIE Lab, YCrCb наиболее информативной оказалась комбинация Cr и Cb каналов в YCrCb [24]. Авторы также предложили модифицировать алгоритм POS, используя вместо комбинаций RGB сигналов, предложенных в оригинальной работе, Cr и Cb каналы. Трансформация из RGB в YCrCb пространство происходит следующим образом [25]:

$\begin{equation} \begin{aligned} \begin{pmatrix} Y \\ Cr \\ Cb \end{pmatrix} = \begin{pmatrix} 0.299 & 0.587 & 0.114 \\ -0.168 & -0.331 & 0.499 \\ 0.499 & -0.418 & -0.081 \end{pmatrix} \cdot \begin{pmatrix} R \\ G \\ B \end{pmatrix} \end{aligned} \end{equation}$

Поэтому в модифицированном POS оригинальная проекционная матрица была заменена на следующую:

${P = \begin{pmatrix} -0.168 & -0.331 & 0.499 \\ 0.499 & -0.418 & -0.081 \end{pmatrix} }$

Авторы отметили, что это повысило отношение сигнала к шуму в получаемом пульсовом сигнале, однако в ходе наших экспериментов абсолютная ошибка при использовании такого подхода оказалась большей по сравнению с оригинальным методом POS. В других работах было также отмечено преимущество использования HSI и YCrCb [26] и CIE Lab [27, 28] пространств по сравнению с RGB. Однако результаты являются противоречивыми. При непосредственном сравнении различных цветовых пространств наименьшая ошибка наблюдалась именно в RGB‑пространстве, тогда как использование HSI или YCrCb значительно ухудшало результаты [29]. В наших экспериментах цветовая трансформация в CIE Lab привела к некоторому улучшению результатов в датасете UBFC‑rPPG, однако для других датасетов это привело к увеличению ошибок.

Рисунок 17. Изображение в различных цветовых пространствах. Верхний ряд – RGB, CIE Lab, YCrCb. Нижний ряд – XYZ, HLS, HSV.

3. Экспериментальная часть и ее результаты

Настоящая работа была посвящена сравнению эффективности различных методов выбора области интереса и применения фильтров и их комбинаций для дистанционной фотоплетизмографии. Для анализа использовалось 3 датасета — UBFC‑rPPG (40 видео) [37], MCD‑rPPG (были выбраны 40 видео) и MMPD (было выбрано по одному видео для каждого из 33 участников) [43]. Каждое видео разделялось на непересекающиеся сегменты по 10 секунд, истинное значение ЧСС определялось на основе соответствующего сегмента контактной фотоплетизмограммы в датасете. Для подсчета ЧСС применялся спектральный анализ, а в качестве метрики использовалась средняя абсолютная ошибка.

Для выбора области интереса применялось несколько ранее описанных вариантов:

1) использование алгоритма Виолы и Джонса для получения области, содержащей лицо, и ее последующая обрезка для устранения краев, содержащих фон, а также закрытие области глаз для устранения влияния бликов;

2) использование Mediapipe Face Mesh для выбора всего лица за исключением глаз и рта;

3) использование Mediapipe Face Mesh для выбора области щек и лба;

4) использование алгоритма Виолы и Джонса для получения области, содержащей лицо, и применение адаптивной оценки цвета кожи с помощью гистограмм.

Третий вариант оказался наиболее эффективным. Сочетание третьего и четвертого вариантов, хотя и способствовало лучшей сегментации кадров, позволяя оставить только пиксели кожи, привело к незначительному ухудшению результатов.

Далее было проведено сравнение эффективности фильтра для устранения тренда, фильтра Баттерворта, фильтра Чебышева 2 типа и скользящего среднего фильтра [9] по отдельности, а также в комбинациях. Так как фильтры Баттерворта и Чебышева имеют схожую функцию, то их совместное применение не оценивалось. Таким образом было получено 12 возможных комбинаций фильтров, которые применялись совместно с алгоритмами GREEN, CHROM, POS, PBV, LGI и OMIT.

Использование оптимальной комбинации фильтров способно существенным образом улучшить эффективность дистанционной фотоплетизмографии. Лучшие результаты для каждого из алгоритмов, а также результаты без использования каких‑либо фильтров приведены в табл. 2. Отметим, что в датасете MMPD результаты значительно хуже из‑за сильного сжатия видео, что ведет к потере информации, затрудняя таким образом процесс извлечения пульсового сигнала.

Почти во всех случаях оптимальной комбинацией оказалось применение фильтра для устранения тренда и фильтра Чебышева 2 типа. Хотя данные фильтры давно известны, и фильтр Чебышева в сравнении с рядом других фильтров был показан как оптимальный [9], настоящий анализ показал, что они представляют собой оптимальную комбинацию.

Наиболее эффективным оказался метод POS, поэтому, чтобы детальнее показать влияние отдельных фильтров и их комбинаций приведем все результаты для данного метода в табл. 3. При этом ключевую роль играют частотные фильтры — их отсутствие (строки №9-12) сопровождается наихудшими результатами. Подтверждая данные литературы, отметим, что фильтр Чебышева 2-го (строки №1-4) типа эффективнее, чем более часто используемый фильтр Баттерворта (строки №5-8). Добавление фильтра для устранения тренда почти всегда ведет к улучшению результатов, тогда как скользящий средний фильтр в одних случаях показывает положительный, а в других случаях отрицательный эффект (например, при сравнении строк №1 и №3, №9 и №10, №11 и №12).

Для иллюстрации эффективности предложенной комбинации фильтров мы также приведем результаты из библиотеки rPPG‑Toolbox для дистанционной фотоплетизмографии [42]. В табл. 4 показано, что предложенная комбинация фильтров позволяет существенным образом улучшить результаты для всех алгоритмов дистанционной фотоплетизмографии.

Помимо алгоритмов дистанционной фотоплетизмографии, основанных на классических методах обработки сигналов, существуют также решения на основе глубокого обучения. Применение нейронных сетей для анализа видео позволяет добиться значительно более высокой точности. Однако серьезной проблемой является нестабильность получаемых результатов — модель, обученная на одном датасете может показывать существенно худшие метрики при тестировании на других наборах данных (сравнение результатов приведено в библиотеке rPPG‑Toolbox [42]). Ключевая причина — это, вероятно, небольшой размер датасетов для дистанционной фотоплетизмографии, что способствует сильному переобучению. Хотя в дальнейшем модели глубокого обучения могут оказаться более перспективными, в настоящий момент классические методы обработки сигналов благодаря своей устойчивости представляются более предпочтительными.

В заключение, отметим, что дистанционная фотоплетизмография — это активно развивающееся направление, которое имеет большие перспективы для использования в телемедицине, бесконтактном мониторинге жизненно важных показателей и в качестве скринингового метода диагностики благодаря простоте и удобству применения в сочетании с высокой точностью. Предложенная в настоящей работе комбинация фильтров, отличаясь простотой, может существенным образом улучшить работу алгоритмов извлечения пульсового сигнала и, таким образом, рекомендована для широкого применения с целью повышения эффективности методик дистанционной фотоплетизмографии.

Библиографический список

1. Ontiveros, Rodrigo Castellano, et al. “Evaluating RGB Channels in Remote Photoplethysmography: A Comparative Study with Contact-Based PPG.” Frontiers in Physiology, vol. 14, 22 Dec. 2023, https://doi.org/10.3389/fphys.2023.1296277

2. Волков Иван Юрьевич, Сагайдачный Андрей Александрович, Фомин Андрей Владимирович ФОТОПЛЕТИЗМОГРАФИЧЕСКАЯ ВИЗУАЛИЗАЦИЯ ГЕМОДИНАМИКИ И ДВУХМЕРНАЯ ОКСИМЕТРИЯ // Изв. Сарат. ун-та Нов. сер. Сер. Физика. 2022. №1. URL: https://cyberleninka.ru/article/n/fotopletizmograficheskaya-vizualizatsiya-gemodinamiki-i-dvuhmernaya-oksimetriya.

3. Verkruysse, W., Svaasand, L. O., & Nelson, J. S. (2008). Remote plethysmographic imaging using ambient light. Optics express, 16(26), 21434–21445. https://doi.org/10.1364/oe.16.021434

4. M. Hulsbusch, “An image-based functional method for opto-electronic ¨ detection of skin perfusion,” Ph.D. dissertation (in German), Dept. Elect. Eng., RWTH Aachen Univ., Aachen, Germany, 2008.

5. Wang, Wenjin, et al. “Algorithmic Principles of Remote PPG.” IEEE Transactions on Biomedical Engineering, vol. 64, no. 7, July 2017, pp. 1479–1491, https://doi.org/10.1109/tbme.2016.2609282.

6. Haugg, Fridolin, et al. “GRGB RPPG: An Efficient Low-Complexity Remote Photoplethysmography-Based Algorithm for Heart Rate Estimation.” Bioengineering, vol. 10, no. 2, 12 Feb. 2023, p. 243, https://doi.org/10.3390/bioengineering10020243.

7. Ru Jing Lee, et al. “Review on Remote Heart Rate Measurements Using Photoplethysmography.” Multimedia Tools and Applications, 19 Oct. 2023, https://doi.org/10.1007/s11042-023-16794-9.

8. Liu, Yiming, et al. A Modified POS-Based RPPG with Real-Time Deep Facial ROI Tracker and Pose Constrained Kalman Filter. 2 Feb. 2021, pp. 169–179, https://doi.org/10.1145/3456529.3456558.

9. Guler, Saygun, et al. “Optimal Digital Filter Selection for Remote Photoplethysmography (RPPG) Signal Conditioning.” Biomedical Physics & Engineering Express, vol. 9, no. 2, 11 Jan. 2023, pp. 027001–027001, https://doi.org/10.1088/2057-1976/acaf8a.

10. Tarvainen, M.P., et al. “An Advanced Detrending Method with Application to HRV Analysis.” IEEE Transactions on Biomedical Engineering, vol. 49, no. 2, 2002, pp. 172–175, https://doi.org/10.1109/10.979357.

11. de Haan, G, and A van Leest. “Improved Motion Robustness of Remote-PPG by Using the Blood Volume Pulse Signature.” Physiological Measurement, vol. 35, no. 9, 27 Aug. 2014, pp. 1913–1926, https://doi.org/10.1088/0967-3334/35/9/1913.

12. de Haan, Gerard, and Vincent Jeanne. “Robust Pulse Rate from Chrominance-Based RPPG.” IEEE Transactions on Biomedical Engineering, vol. 60, no. 10, 1 Oct. 2013, pp. 2878–2886, ieeexplore.ieee.org/abstract/document/6523142, https://doi.org/10.1109/TBME.2013.2266196.

13. M. Lewandowska, J. Rumiński, T. Kocejko and J. Nowak, "Measuring pulse rate with a webcam — A non-contact method for evaluating cardiac activity," 2011 Federated Conference on Computer Science and Information Systems (FedCSIS), Szczecin, Poland, 2011, pp. 405-410.

14. Poh, Ming-Zher, et al. “Non-Contact, Automated Cardiac Pulse Measurements Using Video Imaging and Blind Source Separation.” Optics Express, vol. 18, no. 10, 7 May 2010, p. 10762, https://doi.org/10.1364/oe.18.010762.

15. Yuriy Mironenko, et al. “Remote Photoplethysmography: Rarely Considered Factors.” ArXiv (Cornell University), 1 June 2020, https://doi.org/10.1109/cvprw50498.2020.00156.

16. Wang, W., den Brinker, A. C., Stuijk, S., & de Haan, G. (2017). Amplitude-selective filtering for remote-PPG. Biomedical optics express, 8(3), 1965–1980. https://doi.org/10.1364/BOE.8.001965

17. Wang, Wenjin, et al. Color-Distortion Filtering for Remote Photoplethysmography. 1 May 2017, https://doi.org/10.1109/fg.2017.18 .

18. D. Botina-Monsalve, et al. “Long Short-Term Memory Deep-Filter in Remote Photoplethysmography.” 2022 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW), 1 June 2020, pp. 1242–1249, https://doi.org/10.1109/cvprw50498.2020.00161.

19. Lee, Jukyung, et al. “Improved Remote Photoplethysmography Using Machine Learning-Based Filter Bank.” Applied Sciences, vol. 14, no. 23, 28 Nov. 2024, p. 11107, https://doi.org/10.3390/app142311107.

20. Kim, Dae-Yeol, et al. “Assessment of ROI Selection for Facial Video-Based RPPG.” Sensors, vol. 21, no. 23, 27 Nov. 2021, p. 7923, https://doi.org/10.3390/s21237923.

21. Casado, Constantino Álvarez, and Miguel Bordallo López. “Face2PPG: An Unsupervised Pipeline for Blood Volume Pulse Extraction from Faces.” ArXiv (Cornell University), 1 Jan. 2022, https://doi.org/10.48550/arxiv.2202.04101.

22. Boccignone, Giuseppe, et al. “Enhancing RPPG Pulse-Signal Recovery by Facial Sampling and PSD Clustering.” Biomedical Signal Processing and Control, vol. 101, Mar. 2025, p. 107158, https://doi.org/10.1016/j.bspc.2024.107158.

23. Tsouri, G. R., & Li, Z. (2015). On the benefits of alternative color spaces for noncontact heart rate measurements using standard red-green-blue cameras. Journal of biomedical optics, 20(4), 048002. https://doi.org/10.1117/1.JBO.20.4.048002

24. Ryu, J., Hong, S., Liang, S., Pak, S., Chen, Q., & Yan, S. (2021). Research on the combination of color channels in heart rate measurement based on photoplethysmography imaging. Journal of biomedical optics, 26(2), 025003. https://doi.org/10.1117/1.JBO.26.2.025003

25. Ryu, J., Hong, S., Liang, S., Pak, S., Chen, Q., & Yan, S. (2021). A measurement of illumination variation-resistant noncontact heart rate based on the combination of singular spectrum analysis and sub-band method. Computer methods and programs in biomedicine, 200, 105824. https://doi.org/10.1016/j.cmpb.2020.105824

26. Sheng, Yi, et al. “An Improved Approach to the Performance of Remote Photoplethysmography.” Computers, Materials & Continua, vol. 73, no. 2, 2022, pp. 2773–2783, https://doi.org/10.32604/cmc.2022.027985 . Accessed 21 June 2022.

27. Yang, Y., Liu, C., Yu, H., Shao, D., Tsow, F., & Tao, N. (2016). Motion robust remote photoplethysmography in CIELab color space. Journal of biomedical optics, 21(11), 117001. https://doi.org/10.1117/1.JBO.21.11.117001.

28. Zhang, Yuzhong, et al. “Illumination Variation-Resistant Video-Based Heart Rate Monitoring Using LAB Color Space.” Optics and Lasers in Engineering, vol. 136, Jan. 2021, p. 106328, https://doi.org/10.1016/j.optlaseng.2020.106328.

29. Zhang, Chi, et al. “Comparative Study on the Effect of Color Spaces and Color Formats on Heart Rate Measurement Using the Imaging Photoplethysmography (IPPG) Method.” Technology and Health Care, vol. 30, 25 Feb. 2022, pp. 391–402, https://doi.org/10.3233/thc-thc228036.

30. Haugg, Fridolin, et al. “Effectiveness of Remote PPG Construction Methods: A Preliminary Analysis.” Bioengineering, vol. 9, no. 10, 20 Sept. 2022, p. 485, https://doi.org/10.3390/bioengineering9100485.

31. Giuseppe Boccignone, Donatello Conte, Vittorio Cuculo, Alessandro D’Amelio, Giuliano Grossi, Raffaella Lanzarotti, and Edoardo Mortara. pyvhr: a python framework for remote photoplethysmography. PeerJ Computer Science, 8:e929, 2022.

32. Yu, Changqian, et al. BiSeNet: Bilateral Segmentation Network for Real-Time Semantic Segmentation. 8 Sept. 2018, pp. 334–349, https://doi.org/10.1007/978-3-030-01261-8_20.

33. Xie, Enze, et al. “SegFormer: Simple and Efficient Design for Semantic Segmentation with Transformers.” ArXiv (Cornell University), 6 Dec. 2021, https://doi.org/10.48550/arxiv.2105.15203.

34. Lee, H., Ko, H., Chung, H. et al. Real-time realizable mobile imaging photoplethysmography. Sci Rep 12, 7141 (2022). https://doi.org/10.1038/s41598-022-11265-x

35. Kumar, M., Veeraraghavan, A., & Sabharwal, A. (2015). DistancePPG: Robust non-contact vital signs monitoring using a camera. Biomedical optics express, 6(5), 1565–1588. https://doi.org/10.1364/BOE.6.001565

36. Po, LM., Feng, L., Li, Y. et al. Block-based adaptive ROI for remote photoplethysmography. Multimed Tools Appl 77, 6503–6529 (2018). https://doi.org/10.1007/s11042-017-4563-7

37. Bobbia, Serge, et al. “Unsupervised Skin Tissue Segmentation for Remote Photoplethysmography.” Pattern Recognition Letters, vol. 124, June 2019, pp. 82–90, https://doi.org/10.1016/j.patrec.2017.10.017.

38. Serge Bobbia, et al. “Real-Time Temporal Superpixels for Unsupervised Remote Photoplethysmography.” 2022 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW), 1 June 2018, pp. 1422–14227, https://doi.org/10.1109/cvprw.2018.00182.

39. Almarshad, M. A., Islam, M. S., Al-Ahmadi, S., & BaHammam, A. S. (2022). Diagnostic Features and Potential Applications of PPG Signal in Healthcare: A Systematic Review. Healthcare (Basel, Switzerland), 10(3), 547. https://doi.org/10.3390/healthcare10030547

40. Park, J., Seok, H. S., Kim, S. S., & Shin, H. (2022). Photoplethysmogram Analysis and Applications: An Integrative Review. Frontiers in physiology, 12, 808451. https://doi.org/10.3389/fphys.2021.808451

41. Гаранин А.А., Рогова В.С., Иванчина П.С., Толкачева Е.О. Веб-фотоплетизмография: возможности и перспективы. Регионарное кровообращение и микроциркуляция. 2023;22(4):11-16. https://doi.org/10.24884/1682-6655-2023-22-4-11-16

42. Xin Liu, Girish Narayanswamy, Akshay Paruchuri, Xiaoyu Zhang, Jiankai Tang, Yuzhe Zhang, Roni Sengupta, Shwetak Patel, Yuntao Wang, and Daniel McDuff. 2023. RPPG-toolbox: deep remote PPG toolbox. In Proceedings of the 37th International Conference on Neural Information Processing Systems (NIPS '23). Curran Associates Inc., Red Hook, NY, USA, Article 2995, 68485–68510.

43. Jiankai Tang, Kequan Chen, Yuntao Wang, Yuanchun Shi, Shwetak Patel, Daniel McDuff, and Xin Liu. Mmpd: Multi-domain mobile video physiology dataset, 2023.

44. MCD-rPPG: на одной волне с телемедициной. https://habr.com/ru/articles/821015/

45. MediaPipe Face Mesh. https://github.com/google-ai-edge/mediapipe/wiki/MediaPipe-Face-Mesh

Источник

Теги

Категория

Новости

Дата

30 мар. 2025 г.

27.11.24 00:39 [email protected]

Although recovering lost or inaccessible Bitcoin can be difficult and unpleasant, it is frequently possible to get back access to one's digital assets with the correct help and direction. Regarding the subject at hand, the examination of Trust Geeks Hack Expert Website www://trustgeekshackexpert.com/ assistance after an error emphasizes how important specialized services may be in negotiating the difficulties of Bitcoin recovery. These providers possess the technical expertise and resources necessary to assess the situation, identify the root cause of the issue, and devise a tailored solution to retrieve the lost funds. By delving deeper into the specifics of Trust Geeks Hack Expert approach, we can gain valuable insights into the nuances of this process. Perhaps they leveraged advanced blockchain analysis tools to trace the transaction history and pinpoint the location of the missing Bitcoins. Or they may have collaborated with the relevant parties, such as exchanges or wallet providers, to facilitate the recovery process. Equally important is the level of personalized support and communication that Trust Geeks Hack Expert likely provided, guiding the affected individual through each step of the recovery effort and offering reassurance during what can be an anxious and uncertain time. The success of their efforts, as evidenced by the positive outcome, underscores the importance of seeking out reputable and experienced service providers when faced with a Bitcoin-related mishap, as they possess the specialized knowledge and resources to navigate these challenges and restore access to one's digital assets. Email.. [email protected]
27.11.24 09:10 Michal Novotny

The biggest issue with cryptocurrency is that it is unregulated, wh ich is why different people can come up with different fake stories all the time, and it is unfortunate that platforms like Facebook and others only care about the money they make from them through ads. I saw an ad on Facebook for Cointiger and fell into the scam, losing over $30,000. I reported it to Facebook, but they did nothing until I discovered deftrecoup . c o m from a crypto community; they retrieved approximately 95% of the total amount I lost.
01.12.24 17:21 KollanderMurdasanu

REACH OUT TO THEM WhatsApp + 156 172 63 697 Telegram (@)Techcyberforc We were in quite a bit of distress. The thrill of our crypto investments, which had once sparked excitement in our lives, was slowly turning into anxiety when my husband pointed out unusual withdrawal issues. At first, we brushed it off as minor glitches, but the situation escalated when we found ourselves facing login re-validation requests that essentially locked us out of our crypto wallet—despite entering the correct credentials. Frustrated and anxious, we sought advice from a few friends, only to hit a wall of uncertainty. Turning to the vast expanse of the internet felt daunting, but in doing so, we stumbled upon TECH CYBER FORCE RECOVERY. I approached them with a mix of skepticism and hope; after all, my understanding of these technical matters was quite limited. Yet, from our very first interaction, it was clear that they were the experts we desperately needed. They walked us through the intricacies of the recovery process, patiently explaining each mechanism—even if some of it went over my head, their reassurance was calming. Our responsibility was simple: to provide the correct information to prove our ownership of the crypto account, and thankfully, we remained on point in our responses. in a timely fashion, TECH CYBER FORCE RECOVERY delivered on their promises, addressing all our withdrawal and access issues exactly when they said they would. The relief we felt was immense, and the integrity they displayed made me confident in fully recommending their services. If you ever find yourself in a similar predicament with your crypto investments, I wholeheartedly suggest reaching out to them. You can connect with TECH CYBER FORCE RECOVERY through their contact details for assistance and valuable guidance. Remember, hope is only a reach away!
02.12.24 23:02 ytre89

Online crypto investment can seem like a promising opportunity, but it's crucial to recognize that there are no guarantees. My experience serves as a stark reminder of this reality. I was drawn in by the allure of high returns and the persuasive marketing tactics employed by various brokers. Their polished presentations and testimonials made it seem easy to profit from cryptocurrency trading. Everything appeared to be legitimate. I received enticing messages about the potential for substantial gains, and the brokers seemed knowledgeable and professional. Driven by excitement and the fear of missing out, I invested a significant amount of my savings. The promise of quick profits overshadowed the red flags I should have noticed. I trusted these brokers without conducting proper research, which was a major mistake. As time went on, I realized that the promised returns were nothing but illusions. My attempts to withdraw funds were met with endless excuses and delays. It became painfully clear that I had fallen victim. The reality hit hard: my hard-earned money was gone, I lost my peace of mind and sanity. In my desperation, I sought help from a company called DEFTRECOUP. That was the turning point for me as I had a good conversation and eventually filed a complaint via DEFTRECOUP COM. They were quite delicate and ensured I got out of the most difficult situation of my life in one piece.
04.12.24 22:24 andreygagloev

When I first heard about Bitcoin back in 2018, I was skeptical. The idea of a decentralized, digital currency seemed too good to be true. But I was intrigued as I learned more about the technology behind it and its potential. I started small, investing just a few hundred dollars, dipping my toes into the cryptocurrency waters. At first, it was exhilarating to watch the value of my investment grow exponentially. I felt like I was part of the future, an early adopter of this revolutionary new asset. But that euphoria was short-lived. One day, I logged into my digital wallet only to find it empty - my Bitcoin had vanished without a trace. It turned out that the online exchange I had trusted had been hacked, and my funds were stolen. I was devastated, both financially and emotionally. All the potential I had seen in Bitcoin was tainted by the harsh reality that with decentralization came a lack of regulation and oversight. My hard-earned money was gone, lost to the ether of the digital world. This experience taught me a painful lesson about the price of trust in the uncharted territory of cryptocurrency. While the technology holds incredible promise, the risks can be catastrophic if you don't approach it with extreme caution. My Bitcoin investment gamble had failed, and I was left to pick up the pieces, wiser but poorer for having placed my faith in the wrong hands. My sincere appreciation goes to MUYERN TRUST HACKER. You are my hero in recovering my lost funds. Send a direct m a i l ( muyerntrusted ( @ ) mail-me ( . )c o m ) or message on whats app : + 1 ( 4-4-0 ) ( 3 -3 -5 ) ( 0-2-0-5 )
12.12.24 00:35 amandagregory

HOW TO HIRE A HACKER TO RECOVER STOLEN BITCOIN WITH FASTFUND RECOVERY
12.12.24 00:35 amandagregory

HOW TO HIRE A HACKER TO RECOVER STOLEN BITCOIN WITH FASTFUND RECOVERY... A few months ago, I made a huge mistake. I invested in what seemed like a legitimate crypto opportunity, only to find out I’d been scammed. I lost a significant amount of money, and the scam platform vanished overnight. I felt completely lost.I had heard of Fastfund Recovery and decided to reach out, even though I was skeptical. From the first conversation, they made me feel heard and understood. They explained the recovery process clearly and kept me updated every step of the way.Within weeks, Fastfund Recovery successfully to recovered my lost funds—something I honestly didn’t think was possible. Their team was professional, transparent, and genuinely caring. I can’t thank them enough for turning a nightmare into a hopeful outcome. If you’re in a similar situation, don’t hesitate to contact them. They truly deliver on their promises. Gmail::: fastfundrecovery8(@)gmail com .....Whatsapp ::: 1::807::::500::::7554
19.12.24 17:07 rebeccabenjamin

USDT RECOVERY EXPERT REVIEWS DUNAMIS CYBER SOLUTION It's great to hear that you've found a way to recover your Bitcoin and achieve financial stability, but I urge you to be cautious with services like DUNAMIS CYBER SOLUTION Recovery." While it can be tempting to turn to these companies when you’re desperate to recover lost funds, many such services are scams, designed to exploit those in vulnerable situations. Always research thoroughly before engaging with any recovery service. In the world of cryptocurrency, security is crucial. To protect your assets, use strong passwords, enable two-factor authentication, and consider using cold wallets (offline storage) for long-term storage. If you do seek professional help, make sure the company is reputable and has positive, verifiable reviews from trusted sources. While it’s good that you found a solution, it’s also important to be aware of potential scams targeting cryptocurrency users. Stay informed about security practices, and make sure you take every step to safeguard your investments. If you need help with crypto security tips or to find trustworthy resources, feel free to ask! [email protected] +13433030545 [email protected]
24.12.24 08:33 dddana

Отличная подборка сервисов! Хотелось бы дополнить список рекомендацией: нажмите сюда - https://airbrush.com/background-remover. Этот инструмент отлично справляется с удалением фона, сохраняя при этом высокое качество изображения. Очень удобен для быстрого редактирования фото. Было бы здорово увидеть его в вашей статье!
27.12.24 00:21 swiftdream

I lost about $475,000.00 USD to a fake cryptocurrency trading platform a few weeks back after I got lured into the trading platform with the intent of earning a 15% profit daily trading on the platform. It was a hell of a time for me as I could hardly pay my bills and got me ruined financially. I had to confide in a close friend of mine who then introduced me to this crypto recovery team with the best recovery SWIFTDREAM i contacted them and they were able to completely recover my stolen digital assets with ease. Their service was superb, and my problems were solved in swift action, It only took them 48 hours to investigate and track down those scammers and my funds were returned to me. I strongly recommend this team to anyone going through a similar situation with their investment or fund theft to look up this team for the best appropriate solution to avoid losing huge funds to these scammers. Send complaint to Email: info [email protected]
31.12.24 04:53 Annette_Phillips

There are a lot of untrue recommendations and it's hard to tell who is legit. If you have lost crypto to scam expresshacker99@gmailcom is the best option I can bet on that cause I have seen lot of recommendations about them and I'm a witness on their capabilities. They will surely help out. Took me long to find them. The wonderful part is no upfront fee till crypto is recover successfully that's how genuine they are.
04.01.25 04:56 florencestella

THE BEST CERTIFIED CRYPTOCURRENCY RECOVERY EXPERT DUNAMIS CYBER SOLUTION
04.01.25 04:57 florencestella

THE BEST CERTIFIED CRYPTOCURRENCY RECOVERY EXPERT DUNAMIS CYBER SOLUTION It sounds like you went through a very frustrating experience with Cointrack, where your access to your own funds was unjustly restricted for months without clear communication or a solution. The extended periods of account freezes, lack of transparency, and vague customer support responses would make anyone anxious. It’s understandable that you suspected the issue could be related to your login activity, but it’s surprising that something as minor as using the same Wi-Fi network could trigger such severe restrictions. I’m glad to hear that DUNAMIS CYBER SOLUTION Recovery was able to help you get your account unlocked and resolve the issue. It’s unfortunate that you had to seek third-party assistance, but it’s a relief that the situation was eventually addressed. If you plan on using any platforms like this again, you might want to be extra cautious, especially when dealing with sensitive financial matters. And if you ever need to share your experience to help others avoid similar issues, feel free to reach out. It might be helpful for others to know about both the pitfalls and the eventual resolution through services like DUNAMIS CYBER SOLUTION Recovery. [email protected] +13433030545 [email protected]
06.01.25 19:09 michaeljordan15

We now live in a world where most business transactions are conducted through Bitcoin and cryptocurrency. With the rapid growth of digital currencies, everyone seems eager to get involved in Bitcoin and cryptocurrency investments. This surge in interest has unfortunately led to the rise of many fraudulent platforms designed to exploit unsuspecting individuals. People are often promised massive profits, only to lose huge sums of money when they realize the platform they invested in was a scam. contact with WhatsApp: +1 (443) 859 - 2886 Email @ digitaltechguard.com Telegram: digitaltechguardrecovery.com website link:: https://digitaltechguard.com This was exactly what happened to me five months ago. I was excited about the opportunity to invest in Bitcoin, hoping to earn a steady return of 20%. I found a platform that seemed legitimate and made my investment, eagerly anticipating the day when I would be able to withdraw my earnings. When the withdrawal day arrived, however, I encountered an issue. My bank account was not credited, despite seeing my balance and the supposed profits in my account on the platform. At first, I assumed it was just a technical glitch. I thought, "Maybe it’s a delay in the system, and everything will be sorted out soon." However, when I tried to contact customer support, the line was either disconnected or completely unresponsive. My doubts started to grow, but I wanted to give them the benefit of the doubt and waited throughout the day to see if the situation would resolve itself. But by the end of the day, I realized something was terribly wrong. I had been swindled, and my hard-earned money was gone. The realization hit me hard. I had fallen victim to one of the many fraudulent Bitcoin platforms that promise high returns and disappear once they have your money. I knew I had to act quickly to try and recover what I had lost. I started searching online for any possible solutions, reading reviews and recommendations from others who had faced similar situations. That’s when I came across many positive reviews about Digital Tech Guard Recovery. After reading about their success stories, I decided to reach out and use their services. I can honestly say that Digital Tech Guard Recovery exceeded all my expectations. Their team was professional, efficient, and transparent throughout the process. Within a short time, they helped me recover a significant portion of my lost funds, which I thought was impossible. I am incredibly grateful to Digital Tech Guard Recovery for their dedication and expertise in helping me get my money back. If you’ve been scammed like I was, don’t lose hope. There are solutions, and Digital Tech Guard Recovery is truly one of the best. Thank you, Digital Tech Guard Recovery! You guys are the best. Good luck to everyone trying to navigate this challenging space. Stay safe.
18.01.25 12:41 michaeldavenport218

I was recently scammed out of $53,000 by a fraudulent Bitcoin investment scheme, which added significant stress to my already difficult health issues, as I was also facing cancer surgery expenses. Desperate to recover my funds, I spent hours researching and consulting other victims, which led me to discover the excellent reputation of Capital Crypto Recover, I came across a Google post It was only after spending many hours researching and asking other victims for advice that I discovered Capital Crypto Recovery’s stellar reputation. I decided to contact them because of their successful recovery record and encouraging client testimonials. I had no idea that this would be the pivotal moment in my fight against cryptocurrency theft. Thanks to their expert team, I was able to recover my lost cryptocurrency back. The process was intricate, but Capital Crypto Recovery's commitment to utilizing the latest technology ensured a successful outcome. I highly recommend their services to anyone who has fallen victim to cryptocurrency fraud. For assistance, contact [email protected] Capital Crypto Recover on Telegram OR Call Number +1 (336)390-6684 via email: [email protected]
18.01.25 12:41 michaeldavenport218

I was recently scammed out of $53,000 by a fraudulent Bitcoin investment scheme, which added significant stress to my already difficult health issues, as I was also facing cancer surgery expenses. Desperate to recover my funds, I spent hours researching and consulting other victims, which led me to discover the excellent reputation of Capital Crypto Recover, I came across a Google post It was only after spending many hours researching and asking other victims for advice that I discovered Capital Crypto Recovery’s stellar reputation. I decided to contact them because of their successful recovery record and encouraging client testimonials. I had no idea that this would be the pivotal moment in my fight against cryptocurrency theft. Thanks to their expert team, I was able to recover my lost cryptocurrency back. The process was intricate, but Capital Crypto Recovery's commitment to utilizing the latest technology ensured a successful outcome. I highly recommend their services to anyone who has fallen victim to cryptocurrency fraud. For assistance, contact [email protected] Capital Crypto Recover on Telegram OR Call Number +1 (336)390-6684 via email: [email protected]
20.01.25 15:39 patricialovick86

How To Recover Your Bitcoin Without Falling Victim To Scams: A Testimony Experience With Capital Crypto Recover Services, Contact Telegram: @Capitalcryptorecover Dear Everyone, I would like to take a moment to share my positive experience with Capital Crypto Recover Services. Initially, I was unsure if it would be possible to recover my stolen bitcoins. However, with their expertise and professionalism, I was able to fully recover my funds. Unfortunately, many individuals fall victim to scams in the cryptocurrency space, especially those involving fraudulent investment platforms. However, I advise caution, as not all recovery services are legitimate. I personally lost $273,000 worth of Bitcoin from my Binance account due to a deceptive platform. If you have suffered a similar loss, you may be considering crypto recovery, The Capital Crypto Recover is the most knowledgeable and effective Capital Crypto Recovery Services assisted me in recovering my stolen funds within 24 hours, after getting access to my wallet. Their service was not only prompt but also highly professional and effective, and many recovery services may not be trustworthy. Therefore, I highly recommend Capital Crypto Recover to you. i do always research and see reviews about their service, For assistance finding your misplaced cryptocurrency, get in touch with them, They do their jobs quickly and excellently, Stay safe and vigilant in the crypto world. You can reach them via email at [email protected] OR Call/Text Number +1 (336)390-6684 his contact: [email protected]
22.01.25 21:43 DoraJaimes23

Recovery expert. I lost my bitcoin to fake blockchain impostors on Facebook, they contacted me as blockchain official support and i fell stupidly for their mischievous act, this made them gain access into my blockchain wallet whereby 7.0938 btc was stolen from my wallet in total .I was almost in a comma and dumbfounded because this was all my savings i relied on . Then I made a research online and found a recovery expert , with the contact address- { RECOVERYHACKER101 (@) GMAIL . COM }... I wrote directly to the specialist explaining my loss. Hence, he helped me recover a significant part of my investment just after 2 days he helped me launch the recovery program , and the culprits were identified as well , all thanks to his expertise . I hope I have been able to help someone as well . Reach out to the recovery specialist to recover you lost funds from any form of online scam Thanks
23.01.25 02:36 [email protected]

After falling victim to a fraudulent Bitcoin mining scam, I found myself in a desperate situation. I had invested $50,000 into a cloud mining website called Miningpool, which turned out to be a complete scam. For months, I tried reaching out to the company, but I was unable to access my funds, and I quickly realized I had been taken for a ride. In my search for help, I came across TrustGeeks Hack Expert, a service that claimed to help people recover lost funds from crypto scams. Though skeptical at first, I decided to give them a try. Here’s my experience with their service.When I initially contacted TrustGeeks Hack Expert Email.. Trustgeekshackexpert{At}fastservice{Dot}com , I was understandably hesitant. Like many others, I had been tricked into believing my Bitcoin investments were legitimate, only to discover they were locked in a non-spendable wallet with no way of accessing them. However, after sharing my story and details about the scam, the team assured me they had handled similar cases and had the expertise to help. They requested basic information about my investment and began their investigation immediately. The recovery process was nothing short of professional. Unlike many other services that promise quick fixes but fail to deliver, TrustGeeks Hack Expert kept me informed at every stage. They regularly updated me on their progress and were completely transparent about the challenges they faced. There were moments when I wondered if the process would work, but the team’s professionalism and reassurance gave me hope. They were honest about the time it would take and did not make any unrealistic promises, which I truly appreciated. After several weeks of work, TrustGeeks Hack Expert successfully recovered not just my $50,000 investment, but also the so-called profits that had been locked away in the scam's non-spendable wallet. This was a huge relief, as I had resigned myself to the idea that I had lost everything. The entire recovery process was discreet and handled with the utmost care, ensuring that the scam company remained unaware of the recovery efforts, which helped prevent further complications. TeleGram iD. Trustgeekshackexpert & What's A p p +1 7 1 9 4 9 2 2 6 9 3
23.01.25 02:37 [email protected]

After falling victim to a fraudulent Bitcoin mining scam, I found myself in a desperate situation. I had invested $50,000 into a cloud mining website called Miningpool, which turned out to be a complete scam. For months, I tried reaching out to the company, but I was unable to access my funds, and I quickly realized I had been taken for a ride. In my search for help, I came across TrustGeeks Hack Expert, a service that claimed to help people recover lost funds from crypto scams. Though skeptical at first, I decided to give them a try. Here’s my experience with their service.When I initially contacted TrustGeeks Hack Expert Email.. Trustgeekshackexpert{At}fastservice{Dot}com , I was understandably hesitant. Like many others, I had been tricked into believing my Bitcoin investments were legitimate, only to discover they were locked in a non-spendable wallet with no way of accessing them. However, after sharing my story and details about the scam, the team assured me they had handled similar cases and had the expertise to help. They requested basic information about my investment and began their investigation immediately. The recovery process was nothing short of professional. Unlike many other services that promise quick fixes but fail to deliver, TrustGeeks Hack Expert kept me informed at every stage. They regularly updated me on their progress and were completely transparent about the challenges they faced. There were moments when I wondered if the process would work, but the team’s professionalism and reassurance gave me hope. They were honest about the time it would take and did not make any unrealistic promises, which I truly appreciated. After several weeks of work, TrustGeeks Hack Expert successfully recovered not just my $50,000 investment, but also the so-called profits that had been locked away in the scam's non-spendable wallet. This was a huge relief, as I had resigned myself to the idea that I had lost everything. The entire recovery process was discreet and handled with the utmost care, ensuring that the scam company remained unaware of the recovery efforts, which helped prevent further complications. TeleGram iD. Trustgeekshackexpert & What's A p p +1 7 1 9 4 9 2 2 6 9 3
23.01.25 14:20 nellymargaret

DUNAM CYBER SOLUTION BTC-ETH RECOVERY EXPERT
23.01.25 14:20 nellymargaret

DUNAM CYBER SOLUTION BTC-ETH RECOVERY EXPERT I had tried to secure my Bitcoin wallet, maybe a bit too aggressively, enabling every security feature imaginable: two-factor authentication, biometric verification, intricate passwords-the whole shebang. I wanted to make it impossible for anybody to get to my money. I tried to make this impregnable fortress of security and ended up locking myself out of my wallet with $700,000 in Bitcoin. It wasn't until I tried to access my wallet that I realized the trap I had set for myself. I was greeted with an endless series of security checks-passwords, codes, facial recognition, and more. I could remember parts of my multi-layered security setup but not enough to actually get in. In fact, my money was behind this digital fortress, and the more I tried to fix it, the worse it seemed to get. I kept tripping over my own layers of protection, unable to find a way back in. Panic quickly set in when I realized I had made it almost impossible for myself to access my own money. That is when I called DUNAMIS CYBER SOLUTION From that very first call, they reassured me that I wasn't the first person to make this kind of mistake and certainly wouldn't be the last. They listened attentively to my explanation and got to work straight away. Their team methodically began to untangle my overly complicated setup. Patience and expertise managed to crack each layer of security step by step until they had restored access to my wallet. [email protected] +13433030545 [email protected]
26.01.25 03:54 [email protected]

Losing access to my crypto wallet account was one of the most stressful experiences ever. After spending countless hours building up my portfolio, I suddenly found myself locked out of my account without access. To make matters worse, the email address I had linked to my wallet was no longer active. When I tried reaching out, I received an error message stating that the domain was no longer in use, leaving me in complete confusion and panic. It was as though everything I had worked so hard for was gone, and I had no idea how to get it back. The hardest part wasn’t just the loss of access it was the feeling of helplessness. Crypto transactions are often irreversible, and since my wallet held significant investments, the thought that my hard-earned money could be lost forever was incredibly disheartening. I spent hours scouring forums and searching for ways to recover my funds, but most of the advice seemed either too vague or too complicated to be of any real help. With no support from the wallet provider and my email account out of reach, I was left feeling like I had no way to fix the situation.That’s when I found out about Trust Geeks Hack Expert . I was hesitant at first, but after reading about their expertise in recovering lost crypto wallets, I decided to give them a try. I reached out to their team, and from the very beginning, they were professional, understanding, and empathetic to my situation. They quickly assured me that there was a way to recover my wallet, and they got to work immediately.Thanks to Trust Geeks Hack Expert , my wallet and funds were recovered, and I couldn’t be more grateful. The process wasn’t easy, but their team guided me through each step with precision and care. The sense of relief I felt when I regained access to my crypto wallet and saw my funds safely back in place was indescribable. If you find yourself in a similar situation, I highly recommend reaching out to Trust Geeks Hack Expert. contact Them through EMAIL: [email protected] + WEBSITE. HTTPS://TRUSTGEEKSHACKEXPERT.COM + TELE GRAM: TRUSTGEEKSHACKEXPERT
28.01.25 21:48 [email protected]

It’s unfortunate that many people have become victims of scams, and some are facing challenges accessing their Bitcoin wallets. However, there's excellent news! With Chris Wang, you can count on top-notch service that guarantees results in hacking. We have successfully helped both individuals and organizations recover lost files, passwords, funds, and more. If you need assistance, don’t hesitate—check out recoverypro247 on Google Mail! What specific methods does Chris Wang use to recover lost funds and passwords? Are there any guarantees regarding the success rate of the recovery services offered? What are the initial steps to begin the recovery process with recoverypro247? this things i tend to ask
02.02.25 20:53 Michael9090

I lost over $155,000 in an investment trading company last year; I was down because the company refused to let me make withdrawals and kept asking for more money…. My friend in the military introduced me to a recovery agent Crypto Assets Recovery with the email address [email protected] and he’s been really helpful, he made a successful recovery of 95% of my investment in less than 24 hours, I’m so grateful to him. If you are a victim of a binary scam and need to get your money back, please don’t hesitate to contact Crypto Assets Recovery in any of the information below. EMAIL: [email protected] WHATSAPP NUMBER : +18125892766
05.02.25 00:04 Jannetjeersten

TECH CYBER FORCE RECOVERY quickly took action, filing my case and working tirelessly on my behalf. Within just four days, I received the surprising news that my 40,000 CAD had been successfully refunded and deposited back into my bank account. I was overjoyed and relieved to see the money returned, especially after the stressful experience. Thanks to TECH CYBER FORCE RECOVERY’s professionalism and dedication, I was able to recover my funds. This experience taught me an important lesson about being cautious with online investments and the importance of seeking expert help when dealing with scams. I am truly grateful to EMAIL: support(@)techcyberforcerecovery(.)com OR WhatsApp: +.1.5.6.1.7.2.6.3.6.9.7 for their assistance, which allowed me to reclaim my money and end the holiday season on a much brighter note.
06.02.25 19:42 Marta Golomb

My name is Marta, and I’m sharing my experience in the hope that it might help others avoid a similar scam. A few weeks ago, I received an email that appeared to be from the "Department of Health and Human Services (DHS)." It claimed I was eligible for a $72,000 grant debit card, which seemed like an incredible opportunity. At first, I was skeptical, but the email looked so professional and convincing that I thought it might be real. The email instructed me to click on a link to claim the grant, and unfortunately, I followed through. I filled out some personal details, and then, unexpectedly, I was told I needed to pay a "processing fee" to finalize the grant. I was hesitant, but the urgency of the message pushed me to make the payment, believing it was a necessary step to receive the funds. Once the payment was made, things quickly went downhill. The website became unreachable, and I couldn’t get in touch with anyone from the supposed DHS. It soon became clear that I had been scammed. The email, which seemed so legitimate, had been a clever trick to steal my money.Devastated and unsure of what to do, I began searching for ways to recover my lost funds. That’s when I found Tech Cyber Force Recovery, a team of experts who specialize in tracing stolen money and assisting victims of online fraud. They were incredibly reassuring and quickly got to work on my case. After several days of investigation, they managed to track down the scammers and recover my funds. I can’t express how grateful I am for their help. Without Tech Cyber Force Recovery, I don’t know what I would have done. This experience has taught me a valuable lesson: online scams are more common than I realized, and the scammers behind them are incredibly skilled. They prey on people’s trust, making it easy to fall for their tricks. HOW CAN I RECOVER MY LOST BTC,USDT =Telegram= +1 561-726-36-97 =WhatsApp= +1 561-726-36-97
08.02.25 05:45 [email protected]

I'm incredibly grateful that I did enough research to recover my stolen cryptocurrency. When I first fell victim to a scam, I felt hopeless and lost, unsure if I'd ever see my funds again. A few months ago, I was approached by someone on Telegram who claimed to have a lucrative investment opportunity in cryptocurrencies. They promised huge returns and played on my emotions, making it seem like a can't-miss chance. I was so eager to make my money grow that I didn't fully vet the situation, and unfortunately, I ended up falling for the scam. They guided me to invest a significant amount of money, and soon after, I realized I had been duped. The scammers blocked me, and my funds were gone. I felt devastated. All of my savings had been wiped out in what seemed like an instant, and the feeling of being taken advantage of was crushing. I spent days researching how to recover my stolen cryptocurrency but found the process to be overwhelming and complicated. I was starting to lose hope when I came across Trust Geeks Hack Expert. At first, I was skeptical about reaching out to a cryptocurrency recovery company, but after reading testimonials and researching their reputation, I decided to give them a try. I contacted Trust Geeks Hack Expert Website: www://trustgeekshackexpert.com/, and I was immediately reassured by their professionalism and expertise. They took the time to listen to my situation, and they were honest about what could and could not be done. What stood out to me was their deep understanding of cryptocurrency fraud and the recovery process. They were able to track down the scammers and initiate the recovery of my stolen funds, step by step. Thanks to Trust Geeks Hack Expert, I was able to get back a significant portion of the cryptocurrency I had lost. Their team was responsive, transparent, and diligent in their efforts. I was kept informed throughout the entire process, and they made sure I felt supported every step of the way. I truly can't thank them enough for their dedication and for restoring my faith in the possibility of recovery after such a devastating loss. I will definitely recommend Trust Geeks Hack Expert to anyone who has fallen victim to a cryptocurrency scam. TeleGram: Trustgeekshackexpert & what's A p p +1 7 1 9 4 9 2 2 6 9 3
08.02.25 05:46 [email protected]

I'm incredibly grateful that I did enough research to recover my stolen cryptocurrency. When I first fell victim to a scam, I felt hopeless and lost, unsure if I'd ever see my funds again. A few months ago, I was approached by someone on Telegram who claimed to have a lucrative investment opportunity in cryptocurrencies. They promised huge returns and played on my emotions, making it seem like a can't-miss chance. I was so eager to make my money grow that I didn't fully vet the situation, and unfortunately, I ended up falling for the scam. They guided me to invest a significant amount of money, and soon after, I realized I had been duped. The scammers blocked me, and my funds were gone. I felt devastated. All of my savings had been wiped out in what seemed like an instant, and the feeling of being taken advantage of was crushing. I spent days researching how to recover my stolen cryptocurrency but found the process to be overwhelming and complicated. I was starting to lose hope when I came across Trust Geeks Hack Expert. At first, I was skeptical about reaching out to a cryptocurrency recovery company, but after reading testimonials and researching their reputation, I decided to give them a try. I contacted Trust Geeks Hack Expert Website: www://trustgeekshackexpert.com/, and I was immediately reassured by their professionalism and expertise. They took the time to listen to my situation, and they were honest about what could and could not be done. What stood out to me was their deep understanding of cryptocurrency fraud and the recovery process. They were able to track down the scammers and initiate the recovery of my stolen funds, step by step. Thanks to Trust Geeks Hack Expert, I was able to get back a significant portion of the cryptocurrency I had lost. Their team was responsive, transparent, and diligent in their efforts. I was kept informed throughout the entire process, and they made sure I felt supported every step of the way. I truly can't thank them enough for their dedication and for restoring my faith in the possibility of recovery after such a devastating loss. I will definitely recommend Trust Geeks Hack Expert to anyone who has fallen victim to a cryptocurrency scam. TeleGram: Trustgeekshackexpert & what's A p p +1 7 1 9 4 9 2 2 6 9 3
10.02.25 21:22 sulabhakuchchal

W.W.W.techcyberforcerecovery.com MAIL. [email protected] My name is sulabha kuchchal, and I’m from Mumbai. A few months ago, I faced a nightmare scenario that many in the crypto world fear: I lost access to my $60,000 wallet after a malware attack. The hacker gained control of my private keys, and I was unable to access my funds. Panic set in immediately as I realized the magnitude of the situation. Like anyone in my shoes, I felt completely helpless. But luckily, a friend recommended TECH CYBER FORCE RECOVERY, and it turned out to be the best advice I could have gotten. From the moment I reached out to TECH CYBER FORCE RECOVERY, I felt a sense of relief.
11.02.25 04:24 heyemiliohutchinson

I invested substantially in Bitcoin, believing it would secure my future. For a while, things seemed to be going well. The market fluctuated, but I was confident my investment would pay off. But catastrophe struck without warning. I lost access to my Bitcoin holdings as a result of several technical issues and inadequate security measures. Every coin in my wallet suddenly disappeared, leaving me with an overpowering sense of grief. The emotional impact of this loss was far greater than I had imagined. I spiraled into despair, feeling as though my dreams of financial independence were crushed. I was on the verge of giving up when I came across Assets_Recovery_Crusader. Being willing to give them a chance, I had nothing left to lose. They listened to my narrative and took the time to comprehend the particulars of my circumstance, rather than treating me like a case number. They worked diligently, using their advanced recovery techniques and deep understanding of blockchain technology to track down my lost Bitcoin. Assets_Recovery_Crusader rebuilt my trust in the bitcoin space. The financial impact had a significant emotional toll, but I was able to get past it thanks to Assets_Recovery_Crusader’s proficiency and persistence. For proper talks, reach out to them via TELEGRAM : Assets_Recovery_Crusader EMAIL: [email protected]
11.02.25 22:46 jimmybrown

HIRE A HACKE DUNAMIS CYBER SOLUTION
11.02.25 22:46 jimmybrown

HIRE A HACKE DUNAMIS CYBER SOLUTIONI was just hours away from sealing the biggest real estate deal of my life- the kind of deal that would make one feel like a financial genius. It was the dream property, and all I had to do was transfer my $450,000 Bitcoin deposit. Simple, right? Wrong. I pulled up my crypto wallet, ready to finalize the transfer, and access was denied. No big deal. Maybe I mistyped the password. I tried again. Access denied. Panic started seeping in. I switched devices. Rebooted my system. I entered every password I had ever used since the dawn of time, including my childhood nickname and my favorite pizza topping. Still. Nothing. This wasn't a glitch. This was a full-scale disaster. The seller was waiting; my real estate agent was waiting. And my money? Trapped in a digital vault I suddenly had no key to. Every worst-case scenario flooded my head: Had I been hacked? Did I lock myself out? Was this some kind of cosmic payback for every time I blew off software updates? Just about the time I was getting comfortable in my new identity as the guy who almost bought a house, I remembered that a friend, a crypto lawyer-once said something to me about a recovery service. I called him with the urgency of a man dangling off a cliff. The moment I said what happened, he cut me off: "Email DUNAMIS CYBER SOLUTION Recovery. Now." I didn't ask questions. I dialed quicker than I'd ever dialed in my life. From the second they answered, I knew I was with the pros. There was no hemming, no hawing; this team must have handled its fair share of this particular type of nightmare. They talked me through the process, asked the right questions, and went to work like surgeons in a digital operating room. Minutes felt like hours. I was at DEFCON 1, stress-wise. I paced and stared at my phone, wondering if it was time to move into a cave because, at this rate, homeownership was not looking good. Then—the call came: "We got it." I just about collapsed with relief. My funds were safe. My wallet was unlocked. The Bitcoin was transferred just in time, and I signed the contract with literal seconds to spare. And that night, almost lost to the tech catastrophe of the century in that house, I made a couple of vows: never underestimate proper wallet management and always keep DUNAMIS CYBER SOLUTION Recovery on speed dial. [email protected] +13433030545
13.02.25 14:45 aoifewalsh130

TELEGRAM: u/BestwebwizardRecovery EMAIL: [email protected] WEBSITE: https://bestwebwizrecovery.com/ The money I invested was meant for something incredibly important—my wedding. After months of saving, I had finally accumulated enough to make the day truly special. Wanting to grow this fund, I came across a crypto site called Abcfxb.pro, which promised daily returns through “AI crypto arbitrage trading.” They claimed they could deliver 1% returns on my investment every day, and I saw this as an opportunity to multiply my savings quickly. I thought it was the perfect way to ensure I’d have enough to cover all the wedding expenses. For the first few days, everything seemed perfect. I saw the promised returns and was able to withdraw money without any issues. It felt like a legitimate opportunity, and I was excited as my wedding fund grew. However, things took a turn when I tried to withdraw again. The site claimed that my account balance had fallen below their liquidity requirement and asked me to deposit more funds to proceed. Reluctantly, I deposited more money, believing it was just a minor issue. But the situation only worsened. I was then told that my withdrawal would take 50 days due to “blockchain congestion.” I wasn’t too concerned at first, thinking it was just a delay. But after 50 days, I still hadn’t received my funds, and they gave me the same excuse. Desperate, I contacted the site again, only to be informed that I would need to pay a 15% fee for “technical support” from the “Federal Reserve’s blockchain regulator” before I could withdraw my money. By now, I realized I had fallen victim to a scam. As I researched further, I found that others had been scammed in the same way, and the scammers had moved to another site with nearly the same layout. It was then that I came across a review from another victim, who explained how Best Web Wizard Recovery had helped him recover his lost funds. Desperate for a solution, I reached out to Best Web Wizard Recovery. To my relief, they responded quickly and professionally. Within six hours, they had successfully recovered my full investment. I was beyond grateful, especially since the money had been intended for my wedding. Thanks to their help, I was able to not only get my money back but also go ahead with my wedding as planned. It was a day I will always cherish, and I owe it to Best Web Wizard Recovery for helping me make it a reality. I highly recommend their services to anyone who has fallen victim to a crypto scam.
13.02.25 16:50 andytom798

I lost $210,000 worth of Bitcoin to a group of fake blockchain impostors on Red note, a Chinese app. They contacted me, pretending to be official blockchain support, and I was misled into believing they were legitimate. At the time, I had been saving up in Bitcoin, hoping to take advantage of the rising market. The scammers were convincing, and I made the mistake of trusting them with access to my blockchain wallet. To my shock and disbelief, they stole a total of $10,000 worth of Bitcoin from my wallet. It was devastating, as this amount represented all of my hard-earned savings. I was in utter disbelief, feeling foolish for falling for their deceptive tactics. I felt lost, as though everything I had worked towards was taken from me in an instant. Thankfully, my uncle suggested I reach out to an expert in cryptocurrency recovery. After doing some research online, I came across CYBERPOINT RECOVERY COMPANY. I was hesitant at first, but their positive reviews gave me some hope. I decided to contact them directly and explained my situation, including the amount I had lost and how the scammers had gained access to my account. To my relief, the team at CYBERPOINT RECOVERY responded quickly and assured me they could help. They launched a detailed recovery program, using advanced tools and techniques to trace the stolen Bitcoin. Within a matter of days, they successfully recovered my full $210,000 worth of Bitcoin, and they even identified the individuals behind the scam. Their expertise and professionalism made a huge difference, and I was incredibly grateful for their support. If you find yourself in a similar situation, I highly recommend reaching out to Cyber Constable Intelligence. They helped me recover my funds when I thought all hope was lost. Whether you’ve lost money to scammers or any other form of online fraud, they have the knowledge and resources to help you get your funds back. Don’t give up there are experts who can help you reclaim what you’ve lost. I’m sharing my story to hopefully guide others who are going through something similar. Here's Their Info Below ([email protected]) or W.H.A.T.S.A.P.P:+1.7.6.0.9.2.3.7.4.0.7
13.02.25 16:52 birenderkumar20101

I was able to reclaim my lost Bitcoin assets worth of $480,99 which i had lost to the scam company known as Capitalix fx a scam company pretending to be an investment platform which alot of people including myself have lost their funds to, sadly not all would be fortunate enough to retrieve back their funds like I did but if you’re reading this today then you’re already a step closer towards regaining your lost digital assets, CYBERPOINT RECOVERY COMPANY successfully retrieved back my funds in less than of 48hours after I sought for their help to get back my funds. This experience has taught me the importance of carrying out my due diligence before embracing any financial opportunity presented to me and while risk taking may be a part of the journey, some risks are not worth taking and never again will I involve myself with any online financial investment. It’s only right that we seek for external intervention and support of a higher knowledge system when it comes to digital assets recovery, Get in contact today with the team to get started on Email: ([email protected])
13.02.25 17:37 eunice49954

Agent Jasmine Lopez focuses on recovering stolen cryptocurrency, particularly USDT. She is well-known for helping victims of digital asset theft. Her reputation arises from successful recoveries that have allowed many to regain their lost funds. I witnessed this when $122,000 was taken from me. Thanks to Ms. Lopez's skills, I recovered the entire amount in just 24 hours. Her prompt response and effective methods relieved my financial burden. Ms. Lopez’s commitment to helping others is evident. She is always available to offer solutions to those facing similar problems. For assistance, she can be reached via email at recoveryfundprovider@gmail . com or contacted directly on WhatsApp and text at +44 - 7366 445035. Her Instagram handle is recoveryfundprovider.
14.02.25 02:50 Vladimir876

I was able to reclaim my lost Bitcoin assets worth of $480,99 which i had lost to the scam company known as Capitalix fx a scam company pretending to be an investment platform which alot of people including myself have lost their funds to, sadly not all would be fortunate enough to retrieve back their funds like I did but if you’re reading this today then you’re already a step closer towards regaining your lost digital assets, CYBERPOINT RECOVERY COMPANY successfully retrieved back my funds in less than of 48hours after I sought for their help to get back my funds. This experience has taught me the importance of carrying out my due diligence before embracing any financial opportunity presented to me and while risk taking may be a part of the journey, some risks are not worth taking and never again will I involve myself with any online financial investment. It’s only right that we seek for external intervention and support of a higher knowledge system when it comes to digital assets recovery, Get in contact today with the team to get started on Email: ([email protected]) or W.H.A.T.S.A.P.P:+1.7.6.0.9.2.3.7.4.0.7
14.02.25 02:56 christophadelbert3

Я был в полном смятении, когда потерял все свои сбережения, инвестируя в криптовалюту. Со мной связалась онлайн женщина по электронной почте, выдавая себя за менеджера по работе с клиентами банка, которая сказала мне, что я могу удвоить свои сбережения, инвестируя в криптовалюту. Я никогда не думал, что это будет мошенничество, и я потеряю все. Это продолжалось неделями, пока я не понял, что меня обманули. Вся надежда была потеряна, я был опустошен и разорен, к счастью для меня, я наткнулся на статью в моем местном бюллетене о CYBERPUNK RECOVERY Bitcoin Recovery. Я связался с ними и предоставил всю информацию по моему делу. Я был поражен тем, как быстро они вернули мои криптовалютные средства и смогли отследить этих мошенников. Я действительно благодарен за их услуги и рекомендую CYBERPUNK RECOVERY всем, кому нужно вернуть свои средства. Настоятельно рекомендую вам связаться с CYBERPUNK, если вы потеряли свои биткойны USDT или ETH из-за инвестиций в биткойны Электронная почта: ([email protected]) W.h.a.t.s.A.p.p (+.1.7.6.0.9.2.3.7.4.0.7)
14.02.25 02:56 christophadelbert3

I was in total dismay when I lost my entire savings investing in cryptocurrency, I was contacted online by a lady through email pretending to be an account manager of a bank, who told me I could make double my savings through cryptocurrency investment, I never imagined it would be a scam and I was going to lose everything. It went on for weeks until I realized that I have been scammed. All hope was lost, I was devastated and broke, fortunately for me, I came across an article on my local bulletin about CYBERPUNK RECOVERY Bitcoin Recovery, I contacted them and provided all the information regarding my case, I was amazed at how quickly they recovered my cryptocurrency funds and was able to trace down those scammers. I’m truly grateful for their service and I recommend CYBERPUNK RECOVERY to everyone who needs to recover their funds urge you to contact CYBERPUNK if you have lost your bitcoin USDT or ETH through bitcoin investment Email: ([email protected]) WhatsApp (+17609237407)
14.02.25 15:33 prelogmilivoj

I never imagined I would find myself in a situation where I was scammed out of such a significant amount of money, but it happened. I became a victim of a fake online donation project that cost me over $30,000. It all started innocently enough when I was searching for assistance after a devastating fire incident in California. While looking for support, I came across an advertisement that seemed to offer donations for fire victims. The ad appeared legitimate, and I reached out to the project manager to inquire about how to receive the donations. The manager was very convincing and insisted that in order to qualify for the donations, I needed to pay $30,000 upfront. In return, I was promised $1 million in donations. It sounded a bit too good to be true, but in my desperate situation, I made the mistake of believing it. The thought of receiving a substantial amount of help to rebuild after the fire clouded my judgment, and I went ahead and sent the money. However, after transferring the funds, the promised donations never arrived, and the manager disappeared. That’s when I realized I had been scammed. Feeling lost, helpless, and completely betrayed, I tried everything I could to contact the scammer, but all my efforts were in vain. Desperation led me to search for help online, hoping to find a way to recover my money and potentially track down the scammer. That’s when I stumbled upon several testimonies from others who had fallen victim to similar scams and had been helped by a company called Tech Cyber Force Recovery. I reached out to them immediately, providing all the details of the scam and the information I had gathered. To my immense relief, the experts at Tech Cyber Force Recovery acted swiftly. Within just 27 hours, they were able to locate the scammer and initiate the recovery process. Not only did they help me recover the $30,000 I had lost, but the most satisfying part was that the scammer was apprehended by local authorities in their region. Thanks to Tech Cyber Force Recovery, I was able to get my money back and hold the scammer accountable for their actions. I am incredibly grateful for their professionalism, expertise, and dedication to helping victims like me. If you have fallen victim to a scam or fraudulent activity, I highly recommend contacting Tech Cyber Force Recovery. They provide swift and efficient recovery assistance, and I can confidently say they made all the difference in my situation. ☎☎ 1️⃣5️⃣6️⃣1️⃣7️⃣2️⃣6️⃣3️⃣6️⃣9️⃣7️⃣ ☎☎ 📩 1️⃣5️⃣6️⃣1️⃣7️⃣2️⃣6️⃣3️⃣6️⃣9️⃣7️⃣ 📩
14.02.25 22:12 eunice49954

Agent Jasmine Lopez focuses on recovering stolen cryptocurrency, particularly USDT. She is well-known for helping victims of digital asset theft. Her reputation arises from successful recoveries that have allowed many to regain their lost funds. I witnessed this when $122,000 was taken from me. Thanks to Ms. Lopez's skills, I recovered the entire amount in just 24 hours. Her prompt response and effective methods relieved my financial burden. Ms. Lopez’s commitment to helping others is evident. She is always available to offer solutions to those facing similar problems. For assistance, she can be reached via email at recoveryfundprovider@gmail . com or contacted directly on WhatsApp and text at +44 - 7366 445035. Her Instagram handle is recoveryfundprovider.
15.02.25 02:51 Michelle Lynn

Living in Los Angeles, I never imagined I’d face such a difficult chapter in my life. At the time, my wife was pregnant, and we were both excited about starting a family. I fell victim to a series of scams, losing over $170,000 in total. Just when I thought things couldn’t get worse, I received a call from someone who promised to help me recover my losses. Desperate to fix the situation, I went along with it, hoping for a breakthrough. But it turned out to be another scam. However, most of the options I found either seemed dubious or offered no real guarantees. That’s when I came across Cyber Constable Intelligence. It was a company recommended in a Facebook community The team worked tirelessly on my case, and after some time, they successfully recovered 99% of my investment. Although I didn’t recover everything, the 99% recovery was a huge relief They also educated me on how to better protect my digital Asset Here's Their Website Info www cyberconstableintelligence com
15.02.25 02:51 Michelle Lynn

Living in Los Angeles, I never imagined I’d face such a difficult chapter in my life. At the time, my wife was pregnant, and we were both excited about starting a family. I fell victim to a series of scams, losing over $170,000 in total. Just when I thought things couldn’t get worse, I received a call from someone who promised to help me recover my losses. Desperate to fix the situation, I went along with it, hoping for a breakthrough. But it turned out to be another scam. However, most of the options I found either seemed dubious or offered no real guarantees. That’s when I came across Cyber Constable Intelligence. It was a company recommended in a Facebook community The team worked tirelessly on my case, and after some time, they successfully recovered 99% of my investment. Although I didn’t recover everything, the 99% recovery was a huge relief They also educated me on how to better protect my digital Asset Here's Their Website Info www cyberconstableintelligence com, WhatsApp Info: 1 (252) 378-7611
16.02.25 01:01 Peter

I fell victim to a crypto scam and lost a significant amount of money. What are the most effective strategies to recover my funds? I've heard about legal actions, contacting authorities, and hiring recovery experts, but I'm not sure where to start. Can you provide some guidance on the best ways to recover money lost in a crypto scam? Well if this is you, [email protected] gat you covered get in touch and thank me later
16.02.25 20:06 eunice49954

Agent Lopez specializes in recovering stolen cryptocurrencies, especially Bitcoin/USDT. She has built a strong reputation for helping victims reclaim their lost funds. A personal example highlights her effectiveness: I lost $111,000 and, thanks to her prompt action, I recovered it all within 24 hours. Her dedication and skills eased my financial stress. She is always ready to assist others with similar issues. For help, she can be reached by email at Recoveryfundprovider@gmail. com or contact her through WhatsApp at +44 736 644 5035. Her Insta is recoveryfundprovider.
18.02.25 19:35 donovancristina

Now, I’m that person sharing my success story on LinkedIn, telling others about the amazing team at TECH CYBER FORCE RECOVERY who literally saved my financial life. I’ve also become that guy who proudly shares advice like “Always back up your wallet, and if you don’t have TECH CYBER FORCE RECOVERY on speed dial.” So, a big thank you to TECH CYBER FORCE RECOVERY if I ever get a chance to meet the team, I might just offer to buy them a drink. They’ve earned it. FOR CRYPTO HIRING WEBSITE WWW://techcyberforcerecovery.com WHATSAPP : ⏩ wa.me/15617263697
18.02.25 22:13 keithphillip671

WhatsApp +44,7,4,9,3,5,1,3,3,8,5 Telegram @Franciscohack The day my son uncovered the truth—that the man I entrusted my hopes of wealth and companionship with through a cryptocurrency platform was a cunning scammer was the day my world crumbled. The staggering realization that I had been swindled out of 150,000.00 Euro worth of Bitcoin left me in a state of profound despair. As a 73-year-old grappling with loneliness, I had sought solace in what I believed to be a genuine connection, only to find deceit and betrayal. Countless sleepless nights were spent in tears, mourning not only the financial devastation but also the crushing blow to my trust. Attempts to verify the authenticity of our interactions were met with hostility, further deepening my sense of isolation. Through the loss it was my son who became my beacon of resilience. He took upon himself the arduous task of tracing the scam and seeking justice on my behalf. Through meticulous effort and determination, he unearthed {F R A N C I S C O H A C K}, renowned for their expertise in recovering funds lost to cryptocurrency scams. Entrusting them with screenshots and evidence of the fraudulent transactions, my son initiated the journey to reclaim what had been callously taken from me. {F R A N C I S C O H A C K} approached our plight with empathy and unwavering professionalism, immediately instilling a sense of confidence in their abilities. Despite my initial skepticism, their transparent communication and methodical approach reassured us throughout the recovery process. Regular updates on their progress and insights into their strategies provided much-needed reassurance and kept our hopes alive amid the uncertainty. Their commitment to transparency and client welfare was evident in every interaction, fostering a sense of partnership rather than mere service. Miraculously, in what felt like an eternity but was actually an impressively brief period, {F R A N C I S C O H A C K} delivered the astonishing news—I had recovered the entire 150,000.00 Euro worth of stolen Bitcoin. The flood of relief and disbelief was overwhelming, marking not just the restitution of financial losses but the restoration of my faith in justice. {F R A N C I S C O H A C K} proficiency in navigating the intricate landscape of blockchain technology and online fraud was nothing short of extraordinary. Their dedication to securing justice and restoring client confidence set them apart as more than just experts—they were steadfast allies in a fight against digital deceit. What resonated deeply with me {F R A N C I S C O H A C K} integrity and compassion. Despite the monumental recovery, they maintained transparency regarding their fees and ensured fairness in all dealings. Their proactive guidance on cybersecurity measures further underscored their commitment to safeguarding clients from future threats. It was clear that their mission extended beyond recovery—it encompassed education, prevention, and genuine advocacy for those ensnared by cyber fraud. ([email protected]) fills me with profound gratitude. They not only rescued my financial security but also provided invaluable emotional support during a time of profound vulnerability. To anyone navigating the aftermath of cryptocurrency fraud, I wholeheartedly endorse {F R A N C I S C O H A C K}. They epitomize integrity, expertise, and unwavering dedication to their clients' well-being. My experience with {F R A N C I S C O H A C K} transcended mere recovery—it was a transformative journey of resilience, restoration, and renewed hope in the face of adversity.
21.02.25 07:42 daniel231101

I never thought I would fall victim to a crypto scam until I was convinced of a crypto investment scam that saw me lose all my entire assets worth $487,000 to a crypto investment manager who convinced me I could earn more from my investment. I thought it was all gone for good but I kept looking for ways to get back my stolen crypto assets and finally came across Ethical Hack Recovery, a crypto recovery/spying company that has been very successful in the recovery of crypto for many other victims of crypto scams and people who lost access to their crypto. I’m truly grateful for their help as I was able to recover my stolen crypto assets and get my life back together. I highly recommend their services EMAIL ETHICALHACKERS009 AT @GMAIL DOT COM whatsapp +14106350697
21.02.25 21:38 eunice49954

Jasmine Lopez specializes in recovering stolen cryptocurrencies, especially ETH/USDT. She has built a strong reputation for helping victims reclaim their lost funds. A personal example highlights her effectiveness: I lost $111,000 and, thanks to her prompt action, I recovered it all within 24 hours. Her dedication and skills eased my financial stress. She is always ready to assist others with similar issues. For help, she can be reached by email at Recoveryfundprovider@gmail. com or contact her through WhatsApp at +44 736 644 5035. Her Insta is recoveryfundprovider.
22.02.25 18:01 benluna0991

Mark Zuckerberg. That’s the name I was introduced to when I first encountered the cryptocurrency mining platform, WHATS Invest. A person claiming to be Zuckerberg himself reached out to me, saying that he was personally backing the platform to help investors like me earn passive income. At first, I was skeptical—after all, how often do you get a direct connection to one of the world’s most famous tech entrepreneurs? But this individual seemed convincing and assured me that many people were already seeing substantial returns on their investments. He promised me a great opportunity to secure my financial future, so I decided to take the plunge and invest $10,000 into WHATS Invest. They told me that I could expect to see significant returns in just a few months, with payouts of at least $1,500 or more each month. I was excited, believing this would be my way out of financial struggles. However, as time passed, things didn’t go according to plan. Months went by, and I received very little communication. When I finally did receive a payout, it was nowhere near the $1,500 I was promised. Instead, I received just $200, barely 13% of what I had expected. Frustrated, I contacted the support team, but the responses were vague and unhelpful. No clear answers or solutions were offered, and my trust in the platform quickly started to erode. It became painfully clear that I wasn’t going to get anywhere with WHATS Invest, and I began to worry that my $10,000 might be lost for good. That's when I discovered Certified Recovery Services. Desperate to recover my funds, I decided to reach out to them for help. In just 24 hours, they worked tirelessly to recover the majority of my funds, successfully retrieving $8,500 85% of my initial investment. I couldn’t believe how quickly and efficiently they worked to get my money back. I’m extremely grateful for Certified Recovery Servicer's fast and professional service. Without them, I would have been left with a significant loss, and I would have had no idea how to move forward. If you find yourself in a similar situation with WHATS Invest or any other platform that isn’t delivering as promised, I highly recommend reaching out to Certified Recovery Services They were a lifesaver for me, helping me recover nearly all of my funds. It's reassuring to know that trustworthy services like this exist to help people when things go wrong. They also specialize in recovering money lost to online scams, so if you’ve fallen victim to such a scam, don’t hesitate to contact Certified Recovery Services they can help! Here's Their Info Below: WhatsApp: +1(740)258‑1417 mail: [email protected], [email protected] Website info; https://certifiedrecoveryservices.com
23.02.25 22:00 eunice49954

Jasmine Lopez specializes in recovering stolen cryptocurrencies, especially ETH/USDT. She has built a strong reputation for helping victims reclaim their lost funds. A personal example highlights her effectiveness: I lost $111,000 and, thanks to her prompt action, I recovered it all within 24 hours. Her dedication and skills eased my financial stress. She is always ready to assist others with similar issues. For help, she can be reached by email at Recoveryfundprovider@gmail. com or contact her through WhatsApp at +44 736 644 5035. Her Insta is recoveryfundprovider.
24.02.25 06:36 ANDREW DAVIS

RECOVER YOUR SCAMMED FUNDS AND CRYPTOCURRENCY VIA SPOTLIGHT RECOVERY Professional hackers at Spotlight Recovery provide services for compromised devices, accounts, and websites as well as for recovering stolen bitcoin and money from scams. They finish their work safely and quickly. Their order has been fulfilled since day one, and the victim will never be conscious of the outside entrance. Very few even attempt to give critical information, look into network security, or discreetly discuss personal issues. The Spotlight Recovery Crew helped me recover $264,000 that was stolen from my corporate bitcoin wallet, and I appreciate them giving me further details on the unidentified people. In the event that you have been defrauded of your hard-earned cash or bitcoins, contact SPOTLIGHT RECOVERY CREW at Contact: [email protected]
24.02.25 07:19 maggie4567

Jasmine Lopez specializes in recovering stolen cryptocurrencies, especially ETH/USDT. She has built a strong reputation for helping victims reclaim their lost funds. A personal example highlights her effectiveness: I lost $111,000 and, thanks to her prompt action, I recovered it all within 24 hours. Her dedication and skills eased my financial stress. She is always ready to assist others with similar issues. For help, she can be reached by email at Recoveryfundprovider@gmail. com or contact her through WhatsApp at +44 736 644 5035. Her Insta is recoveryfundprovider.
24.02.25 07:19 maggie4567

Jasmine Lopez specializes in recovering stolen cryptocurrencies, especially ETH/USDT. She has built a strong reputation for helping victims reclaim their lost funds. A personal example highlights her effectiveness: I lost $111,000 and, thanks to her prompt action, I recovered it all within 24 hours. Her dedication and skills eased my financial stress. She is always ready to assist others with similar issues. For help, she can be reached by email at Recoveryfundprovider@gmail. com or contact her through WhatsApp at +44 736 644 5035. Her Insta is recoveryfundprovider.
24.02.25 07:19 maggie4567

Jasmine Lopez specializes in recovering stolen cryptocurrencies, especially ETH/USDT. She has built a strong reputation for helping victims reclaim their lost funds. A personal example highlights her effectiveness: I lost $111,000 and, thanks to her prompt action, I recovered it all within 24 hours. Her dedication and skills eased my financial stress. She is always ready to assist others with similar issues. For help, she can be reached by email at Recoveryfundprovider@gmail. com or contact her through WhatsApp at +44 736 644 5035. Her Insta is recoveryfundprovider.
27.02.25 12:46 monikaguttmacher

Weddings are supposed to be magical, but the months leading up to mine were anything but. Already, wedding planning was a high-stress, sleep-deprived whirlwind: endless details to manage, from venue deposits and guest lists to dress fittings and vendor contracts. But nothing-and I mean, nothing-compared to the panic that washed over me when I realized that somehow, I had lost access to my Bitcoin wallet-with $600,000 inside. It happened in the worst possible way. In between juggling my to-do lists and trying to keep my sanity intact, I lost my seed phrase. I went through my apartment like a tornado, flipping through notebooks, checking every email, every file-nothing. I sat there in stunned silence, heart pounding, trying to process the fact that my entire savings, my security, and my financial future might have just vanished. In utter despair, I vented to my bridesmaid's group chat for some sympathetic words from the girls. Instead, one casually threw out a name that would change everything in a second: "Have you ever heard of Tech Cyber Force Recovery? They recovered Bitcoin for my cousin. You should call them." I had never heard of them before, but at that moment, I would have tried anything. I immediately looked them up, scoured reviews, and found story after story of people just like me—people who thought they had lost everything, only for Tech Cyber Force Recovery to pull off the impossible. That was all the convincing I needed. From the very first call, I knew I was in good hands. Their team was calm, professional, and incredibly knowledgeable. They explained the recovery process in a way that made sense, even through my stress-fogged brain. Every step of the way, they kept me informed, reassured me, and made me feel like this nightmare actually had a solution. And then, just a few days later, I got the message: "We have recovered your Bitcoin." (EMAIL. support @ tech cyber force recovery . com) OR WHATSAPP (+1 56 17 26 36 97) I could hardly believe my eyes: Six. Hundred. Thousand. Dollars. In my hands again. I let out my longest breath ever and almost cried, relieved. It felt like I woke up from a bad dream, but it was real, and Tech Cyber Force Recovery had done it. Because of them, I walked down the aisle not just as a bride, but as someone who had dodged financial catastrophe. Instead of spending my honeymoon stressing over lost funds, I got to actually enjoy it—knowing that my wallet, and my future, were secure. Would I refer to them? In a heartbeat. If you ever find yourself in that situation, please don't freak out, just call Tech Cyber Force Recovery. They really are the real deal.
03.03.25 09:35 emiliar

- [url=https://amongus3d.pro/]Among Us 3D[/url] - A 3D version of the popular social deduction game, enhancing the gameplay experience.
03.03.25 09:35 emiliar

<a href="https://howtodateanentity.org/">How to Date An Entity (And Stay Alive)</a> - A psychological dating sim that combines romance with existential horror and government conspiracies.
03.03.25 09:36 emiliar

[PoE 2 Planner](https://poe2planner.org/) - A free online skill tree planner for Path of Exile 2, helping players optimize their character builds.
03.03.25 09:36 emiliar

[How to Date An Entity (And Stay Alive)] - A psychological dating sim that combines romance with existential horror and government conspiracies.
03.03.25 09:37 emiliar

[[How to Date An Entity (And Stay Alive)]] - A psychological dating sim that combines romance with existential horror and government conspiracies.
07.03.25 15:18 Ariduk

BEST LINK FOR RECOVERY SCAM ON TRADING INVESTMENT AND OTHERS TROUBLESHOOT? Welcome To General Hacking Techniques Service known as DHACKERS. Year 2025 we are active and best in what we do, as we give Solution to every problem concerning Web3 INTERNET activities, we guide you right to a positive fund Recovery e.t.c. Question From Most of Our Client, HOW POSSIBLE AND TIME WILL IT TAKE TO RECOVERY LOST OR SCAM FUND? Our Answer. Yes is 89.9% possible and how long it takes your Fund to be recovered depend on you. The fact is there are lot of fake binary investment companies out their, same a lot fake recovery companies and agents too. CAUTION 1). Make sure you ask one or two questions concerning the service and how they render there recovery services. 2) Do not give out your scammed details to any agent or hacker when you are not yet ready to recover back your fund. 3) do not make any payment when you are not sure of the service if you are to make one. (4) We discovered that most of this fake hacker or agent do give us scam details, playing the victim, because they can afford the service charge. 5) As long you have your scam details with you, you can recover your fund back anytime any-day with the right channel. Contact us from our Front Desk. [email protected] For advice and services, our standby Guru email. [email protected] [email protected] List of Service. ▶️Binary Recovery ▶️Data Recovery ▶️University Result Upgraded ▶️Clear your Internet Blunder and controversy ➡️Increase your Credit Score ➡️Wiping of Criminal Records ➡️Social Media Hack ➡️Blank ATM Card ➡️Load and wipe ➡️Phone Hacking ➡️Private Key Reset etc. For quick response. Email [email protected] Border us with your jobs and allow us give you positive result with our hacking skills. All Right Reserved (c)2025
08.03.25 04:42 andreassenhedda

If you’ve fallen victim to online scammers who have deceived you into investing your hard-earned money through fraudulent Bitcoin schemes, know that you're not alone. Countless individuals have been misled by scammers using various tactics to swindle money through deceptive investment platforms or promises of high returns. These scams often come in the form of fake cryptocurrency investments, Ponzi schemes, or phishing scams designed to steal your Bitcoin and other assets. Unfortunately, many victims suffer not only financial loss but also the psychological toll of realizing they’ve been taken advantage of. In some cases, scammers go even further, threatening legal consequences or using intimidation to keep victims silent. However, all hope is not lost. There are ways to recover your funds and potentially even bring those responsible to justice. One promising resource that can assist in reclaiming lost funds is Lee Ultimate Hacker, a trusted platform designed to help victims of online fraud. This service specializes in helping individuals who have been scammed through cryptocurrency investments or similar schemes. The platform’s expertise can help you navigate the process of recovering your money, giving you a chance to fight back against those who’ve wronged you. To begin the recovery process, it’s important to gather any proof of payment or transaction history involving the scammers. This evidence is crucial in tracing the flow of funds and identifying the scam operation behind it. Once you have collected your documentation, you can reach out to Lee Ultimate Hacker via LEEULTIMATEHACKER @ AOL . COM or wh@tsapp +1 (715) 314 - 9248 for assistance. They offer professional services to investigate fraudulent schemes, track Bitcoin transactions, and work to reverse fraudulent transfers. The recovery process can be complex and requires expert knowledge of blockchain technology and financial investigations, but with the help of a dedicated team, you’ll have a better chance of seeing your funds returned. In addition to helping you recover your assets, Lee Ultimate Hacker also works towards identifying the scammers and reporting them to the appropriate authorities. They understand the urgency of halting these fraudsters before they can victimize others. With their assistance, you not only increase the chances of recovering your funds but also play a part in holding cybercriminals accountable. If you've been affected by Bitcoin scams or other fraudulent online activities, reaching out to a service like Lee Ultimate Hacker can provide hope and a clear path forward. Their team can guide you through the recovery process, offering expert support while you take steps to reclaim what you’ve lost. It’s time to take action and work toward reclaiming your hard-earned money.
08.03.25 18:20 Diegolola514gmail.com

[email protected]
08.03.25 18:23 faridasumadi

WEBSITE W.W.W.techcyberforcerecovery.com WHATSAPP +1 561.726.36.97 EMAIL [email protected] I Thought I Was Too Smart to Be Scammed, Until I Was. I'm an attorney, so precision and caution are second nature to me. My life is one of airtight contracts and triple-checking every single detail. I'm the one people come to for counsel. But none of that counted for anything on the day I lost $750,000 in Bitcoin to a scam. It started with what seemed like a normal email, polished, professional, with the same logo as my cryptocurrency exchange's support team. I was between client meetings, juggling calls and drafting agreements, when it arrived. The email warned of "suspicious activity" on my account. My heart pounding, I reacted reflexively. I clicked on the link. I entered my login credentials. I verified my wallet address. The reality hit me like a blow to the chest. My balance was zero seconds later. The screen went dim as horror roiled in my stomach. The Bitcoin I had worked so hard to accumulate over the years, stored for my retirement and my children's future, was gone. I felt embarrassed. Lawyers are supposed to outwit criminals, not get preyed on by them. Mortified, I asked a client, a cybersecurity specialist, for advice, expecting criticism. But he just suggested TECH CYBER FORCE RECOVERY. He assured me that they dealt with delicate situations like mine. I was confident from the first call that I was in good hands. They treated me with empathy and discretion by their staff, no patronizing lectures. They understood the sensitive nature of my business and assured me of complete confidentiality. Their forensic experts dove into blockchain analysis with attention to detail that rivaled my own legal work. They tracked the stolen money through a complex network of offshore wallets and cryptocurrency tumblers tech jargon that appeared right out of a spy thriller. Once they had identified the thieves, they initiated a blockchain reversal process, a cutting-edge method I was not even aware was possible. Three weeks of suffering later, my Bitcoin was back. Every Satoshi counted for. I sat in front of my desk, looking at the refilled balance, tears withheld. TECH CYBER FORCE RECOVERY not only restored my assets, they provided legal-grade documentation that empowered me to bring charges against the scammers. Today, I share my story with colleagues as a warning. Even the best minds get it. But when they do, it is nice to know the Wizards have your back.
09.03.25 17:22 Wayne707

‎Scammers have ruined the forex trading market, they have deceived many people with their fake promises on high returns. I learnt my lesson the hard way. I only pity people who still consider investing with them. Please try and make your researches, you will definitely come across better and reliable forex trading agencies that would help you yield profit and not ripping off your money. Also, if your money has been ripped-off by these scammers, you can report to a regulated crypto investigative unit who make use of software to get money back. If you encounter with some issue make sure you contact ( [email protected] ) they're recovery expert and a very professional one at that. ‎
10.03.25 18:18 springwilli

RECLAIM MY LOSSES REVIEWS HIRE DUNAMIS CYBER SOLUTIONI have always taken a security-first approach with my Bitcoin. That's why I put my hardware wallet in a fireproof safe-because you never know. Turned out I should have been even more paranoid. A few months ago, a fire took hold in my house. I lost nearly everything: the electronics, furniture, irreplaceable memorabilia. But when I dug through the remains, there it was: my Ledger hardware wallet, somehow intact. I held it up like some sort of post-apocalyptic movie scene, thinking, "At least my Bitcoin survived." But then, fate was not quite done with me: when I powered it on, it showed no signs of life whatsoever. The heat had fried the internal chip, and all I had was a melted, lifeless brick. That's when I realized my entire $680,000 in Bitcoin was trapped inside. At first, I told myself: "There has to be a way." From forensic data recovery to DIY repair tricks, everything I could conceivably Google, I researched. I considered buying an identical Ledger device and swapping components: spoiler, not a good idea unless you are an electrical engineer. Nothing worked. Every expert I contacted had the same answer: "Your Bitcoin is gone." I refused to accept that. That's when I found DUNAMIS CYBER SOLUTION I was skeptical, to say the least. If the manufacturer couldn't help me, how would they? At that point, I had no other choice but to try them. The first call I made, I immediately knew I was dealing with pros: no absurd promises, no giving of hopes, just explanation of their entire process with clarity-from advanced forensic techniques to secure data reconstruction. I mailed them my charred wallet, still half expecting a miracle to be impossible. Four days later, an email arrived. The subject line? "We have good news." They had successfully extracted my seed phrase and restored every single Bitcoin. I couldn't believe it. I had gone from losing everything to recovering $680,000 worth of crypto in just days. If your hardware wallet is damaged, dead, or seems irreparable, please do not give up. Just call DUNAMIS CYBER SOLUTION. They really did pull off some sort of high-stakes rescue operation on my behalf, and believe me, it was the stuff of legend. [email protected] +13433030545
10.03.25 20:19 wendytaylor015

My name is Wendy Taylor, I'm from Los Angeles, i want to announce to you Viewer how Capital Crypto Recover help me to restore my Lost Bitcoin, I invested with a Crypto broker without proper research to know what I was hoarding my hard-earned money into scammers, i lost access to my crypto wallet or had your funds stolen? Don’t worry Capital Crypto Recover is here to help you recover your cryptocurrency with cutting-edge technical expertise, With years of experience in the crypto world, Capital Crypto Recover employs the best latest tools and ethical hacking techniques to help you recover lost assets, unlock hacked accounts, Whether it’s a forgotten password, Capital Crypto Recover has the expertise to help you get your crypto back. a security company service that has a 100% success rate in the recovery of crypto assets, i lost wallet and hacked accounts. I provided them the information they requested and they began their investigation. To my surprise, Capital Crypto Recover was able to trace and recover my crypto assets successfully within 24hours. Thank you for your service in helping me recover my $647,734 worth of crypto funds and I highly recommend their recovery services, they are reliable and a trusted company to any individuals looking to recover lost money. Contact email [email protected] OR Telegram @Capitalcryptorecover Call/Text Number +1 (336)390-6684 his contact: [email protected]
10.03.25 20:19 wendytaylor015

My name is Wendy Taylor, I'm from Los Angeles, i want to announce to you Viewer how Capital Crypto Recover help me to restore my Lost Bitcoin, I invested with a Crypto broker without proper research to know what I was hoarding my hard-earned money into scammers, i lost access to my crypto wallet or had your funds stolen? Don’t worry Capital Crypto Recover is here to help you recover your cryptocurrency with cutting-edge technical expertise, With years of experience in the crypto world, Capital Crypto Recover employs the best latest tools and ethical hacking techniques to help you recover lost assets, unlock hacked accounts, Whether it’s a forgotten password, Capital Crypto Recover has the expertise to help you get your crypto back. a security company service that has a 100% success rate in the recovery of crypto assets, i lost wallet and hacked accounts. I provided them the information they requested and they began their investigation. To my surprise, Capital Crypto Recover was able to trace and recover my crypto assets successfully within 24hours. Thank you for your service in helping me recover my $647,734 worth of crypto funds and I highly recommend their recovery services, they are reliable and a trusted company to any individuals looking to recover lost money. Contact email [email protected] OR Telegram @Capitalcryptorecover Call/Text Number +1 (336)390-6684 his contact: [email protected]
11.03.25 13:35 cristydavis101

Не обманывайтесь различными свидетельствами в Интернете, которые, скорее всего, неверны. Я использовал несколько вариантов восстановления, которые в конце концов меня разочаровали, но должен признаться, что CYBERPOINT RECOVERY, который я в конечном итоге нашел, является лучшим из всех. Лучше потратить время на поиски надежного профессионала, который поможет вам вернуть украденные или потерянные криптовалюты, такие как биткойны, чем стать жертвой других хакеров-любителей, которые не справятся с этой работой. ([email protected]) — самый надежный и подлинный эксперт по блокчейн-технологиям, с которым вы можете работать, чтобы вернуть то, что вы потеряли из-за мошенников. Они помогли мне встать на ноги, и я очень благодарен за это. Свяжитесь с ними по электронной почте сегодня, чтобы как можно скорее вернуть потерянные монеты… W.H.A.T.S.A.P.P:+1.7.6.0.9.2.3.7.4.0.7
11.03.25 13:36 cristydavis101

Don’t be deceived by different testimonies online that is most likely wrong. I have made use of several recovery options that got me disappointed at the end of the day but I must confess that the CYBERPOINT RECOVERY I eventually found is the best out here. It’s better you devise your time to find the valid professional that can help you recover your stolen or lost crypto such as bitcoins rather than falling victim of other amateur hackers that cannot get the job done. ([email protected]) is the most reliable and authentic blockchain tech expert you can work with to recover what you lost to scammers. They helped me get back on my feet and I’m very grateful for that. Contact their email today to recover your lost coins ASAP… W.H.A.T.S.A.P.P:+1.7.6.0.9.2.3.7.4.0.7
11.03.25 16:23 dannywilliams

HOW DO I RECOVER MY STOLEN ETH HIRE OPTIMUM HACKERS RECOVERY
11.03.25 16:23 dannywilliams

HOW DO I RECOVER MY STOLEN ETH HIRE OPTIMUM HACKERS RECOVERY "I am incredibly thankful to Optimum Hackers Recovery for their amazing work in retrieving my stolen Ethereum. After falling victim to a fake investment platform, I felt hopeless. Their team was professional, responsive, and dedicated, guiding me through every step of the recovery process. Thanks to their expertise, I was able to recover my funds and regain my peace of mind. I highly recommend their services to anyone who has faced similar challenges!" E.M.A.I.L [email protected] W.h.a.t.s.a.p.p: +1.2.5.6.2.5.6.8.6.3.6.
11.03.25 16:25 ricciordonez

I recovered my lost money, and I can't stop stressing how much DUNENECTARWEBEXPERT has transformed my life. Suppose you're involved in any investment or review platform for potential gains. In that case, I highly recommend contacting DUNENECTARWEBEXPERT via Telegram to verify their legitimacy because they will continue to ask you for deposits until you are financially and emotionally devastated. Don't fall for these investment scams; please reach out to DUNENECTARWEBEXPERT via Telegram to help you recover your lost money and crypto assets from these crooks. Email: support AT dunenectarwebexpert DOT com Website: https://dunenectarwebexpert.com/ Telegram: dunenectarwebexpert
12.03.25 05:35 cholevasaca

As the senior teacher at Greenfield Academy, I wanted to share our ordeal with TECH CYBER FORCE RECOVERY after our school was targeted by a malicious virus attack that withdrew a significant amount of money from our bank account. A third-party virus infiltrated our system and accessed our financial accounts, resulting in a USD 50,000 withdrawal. This attack left us in a state of shock and panic, as it posed a serious threat to our school's financial stability. Upon realizing what had happened, we immediately contacted TECH CYBER FORCE RECOVERY for help. Their team responded promptly and began investigating the situation. They worked tirelessly to track down the virus, analyze its behavior, and understand how it had bypassed our security measures. Most importantly, they focused on recovering the funds that had been stolen from our bank account. Thanks to TECH CYBER FORCE RECOVERY's quick and expert intervention, they were able to successfully recover all the funds that had been withdrawn. Their team worked closely with our bank and utilized advanced recovery methods to ensure the full amount was returned to our account. We were incredibly relieved to see the stolen funds restored, and their efforts prevented any further financial loss. I am incredibly grateful for TECH CYBER FORCE RECOVERY's professionalism, expertise, and swift action in helping us recover the stolen funds. Their team not only managed to undo the damage caused by the virus but also ensured that our financial security was restored. I highly recommend their services to any organization dealing with similar cyberattacks, as their team truly went above and beyond to resolve the issue and protect our assets. CONTACTING THEM TECH CYBER FORCE RECOVERY EMAIL. [email protected]
14.03.25 21:40 adelfinalongo

I had the worst experience of my life when the unthinkable happened and my valued Bitcoin wallet disappeared , I was literally lost and was convinced I’m never getting it back , but all thanks to LEE ULTIMATE HACKER the experienced and ethical hacker on the web and PI they were able to retrieve and help me recover my Bitcoin wallet. This highly skilled team of cyber expertise came to my rescue with their deep technical knowledge and cutting-edge tools to trace cryptocurrency and private investigative prowess they were rapid to pin point the exact location of my missing Bitcoin, LEE ULTIMATE HACKER extracted my crypto with modern technology, transparency and guidance on each step they took, keeping me on the loop and reassuring me that all will be well: contact LEE ULTIMATE HACKER via LEEULTIMATEHACKER @ AOL . COM telegram: LEEULTIMATE wh@tsapp +1 (715) 314 - 9248 for all your cryptocurrency problems and you’ll have a prompt and sure solution.
15.03.25 00:29 irenmroma

CRYPTOCURRENCY RECOVERY FIRM DUNAMIS CYBER SOLUTION
15.03.25 00:29 irenmroma

CRYPTOCURRENCY RECOVERY FIRM DUNAMIS CYBER SOLUTIONIn 2025, I never imagined I would fall victim to a phishing scam, but that’s exactly what happened to me. As a graphic designer in California, I spend a lot of time online and thought I was pretty savvy when it came to spotting potential scams. But one day, I received an email that seemed to be from my bank, Wells Fargo. It looked official and warned me about suspicious activity on my account. The message instructed me to click a link and verify my account details to prevent further issues. Trusting it was legitimate, I followed the instructions and entered my personal banking information.Unfortunately, it was a trap. The email wasn’t from my bank at all. It was from a hacker who had gained access to my sensitive information. Soon after, I noticed a significant withdrawal of $2,300 from my account. Panicked, I contacted Wells Fargo immediately, but despite their efforts, they weren’t able to recover the lost funds. I felt helpless and frustrated, unsure of what to do next.That’s when I heard about DUNAMIS CYBER SOLUTION. Desperate for help, I reached out to their team, and they quickly got to work. They began by investigating the scam and managed to track the hacker’s IP address. They didn’t stop there they worked directly with Wells Fargo to share the findings and helped them investigate further.Thanks to their expertise and fast action,DUNAMIS CYBER SOLUTION was able to facilitate the recovery of $1,800. While I didn’t get the full $2,300 back, I was incredibly grateful for their efforts. It felt like a weight had been lifted, knowing that some of my money had been recovered.This experience taught me an important lesson about online security and the dangers of phishing scams. I was lucky to find DUNAMIS CYBER SOLUTION, and I’m thankful for their support in helping me get back a significant portion of what I lost. Their professionalism and dedication made a stressful situation much more manageable, and I now know how crucial it is to be vigilant and seek help when dealing with online fraud. [email protected] +13433030545
15.03.25 14:34 spencerwerner

It wasn’t an easy process, and it required patience, but the team’s dedication, attention to detail, and methodical approach paid off. I felt an overwhelming sense of relief and gratitude. What had once seemed like a permanent loss was now being reversed, thanks to the help of Tech Cyber Force Recovery. Not only did the recovery restore my financial situation, but it also restored my sense of trust and confidence. I had almost given up hope, but now, with my funds recovered, I feel like I can move forward. I’ve learned valuable lessons from this experience, and I’m more cautious about my financial decisions in the future. What began as a desperate search on Red Note turned into a life-changing recovery. Thanks to Tech Cyber Force Recovery, I now feel more hopeful about my financial future, with the knowledge that recovery is possible. telegram (@)techcyberforc texts (+1 5.6.1.7.2.6.3.6.9.7)
17.03.25 02:30 [email protected]

"Work smart and not hard" that's these scammers' slogan. They lure you with promises of luxury and lifetime riches without you doing anything besides investing in their investment schemes, and if you ever fall prey, they will siphon you of every penny dry. I fell victim to it, but was fortunate to be helped by the best recovery expert (TRUST GEEKS HACK EXPERT). They are more than just recovery specialists; they are allies in the fight against online fraud. Trust their expertise and let them guide you towards reclaiming control over your financial future.for assistance, visit website https://trustgeekshackexpert.com/ Wh@t's A p p +1-7-1-9-4-9-2-2-6-9-3 <> E mail: Trustgeekshackexpert{@}fastservice{.}com
17.03.25 12:20 browne

When trying to recover lost cryptocurrency, it is important to enlist the assistance of recovery specialists who have knowledge in monitoring and evaluating digital assets, as they are better equipped to navigate the complex digital currency market and locate any stolen assets. As a result, I advise you to get in touch with forensic asset firm. Email: [email protected]
17.03.25 13:14 vinnypraise

SPEAK WITH A LICENSED ALPHA KEY BTC/USDT RECOVERY HACKER As of right now, ALPHA KEY RECOVERY is the only authorized and genuine recovery hacker that I will recommend to anyone in the world for a very good reason. I can't express how grateful I am to them for helping me overcome my depression; they are truly a blessing in disguise. If you have any data recovery concerns, you should contact ALPHA KEY RECOVERY.
17.03.25 13:14 vinnypraise

SPEAK WITH A LICENSED ALPHA KEY BTC/USDT RECOVERY HACKER As of right now, ALPHA KEY RECOVERY is the only authorized and genuine recovery hacker that I will recommend to anyone in the world for a very good reason. I can't express how grateful I am to them for helping me overcome my depression; they are truly a blessing in disguise. If you have any data recovery concerns, you should contact ALPHA KEY RECOVERY.
17.03.25 15:23 Charlesagrimes

Running the small business was hard enough in itself without having to suffer such stress as loss of access to a Bitcoin wallet. I had put $532,000 into Bitcoin for my business in case of emergencies, but one day, the wallet was nowhere to be seen. I had trusted it to my friend while he managed my financials, little knowing he would prove less than trustworthy. I couldn't envision the gut-wrenching feeling coupled with a great feeling of folly for having placed so much trust in someone else's hands. I could not believe my eyes to see that all of my digital fortune was gone. Literally, every second of my busy day froze in disbelief as I tried to conceive the loss. I remembered the hours I had put into building my business, securing my investments, and planning for the future. Now, I was staring at an empty wallet that once held my safety net. This hit me hard-not only had I lost $532,000, but the betrayal hurt further because it came from someone I considered reliable. The emotional toll was huge, and this financial hit could cripple my business. In the midst of my despair, I knew I had to act fast. I went online, searching everywhere for a solution through which I could get back in control of my finances. That is where I came across Digital resolution services. I knew them for recovery related to lost crypto, but also somehow skeptical. At that point, it looked like I had nothing left to lose. I reached out, and with our very first conversation, I gained the impression that they did understand my situation. Their team was nothing short of extraordinary. They approached my case with professionalism and empathy, meticulously explaining the recovery process in clear, simple terms that alleviated some of my anxiety. They set realistic expectations while promising to do everything possible to retrieve my funds. Over the next several weeks, they worked tirelessly, employing advanced blockchain forensic techniques and sophisticated tracking tools that I’d never even heard of before. It kept me informed with constant updates and gave me hope in this desperate time. Finally, it came-the day Digital resolution services recovered my lost Bitcoin. Relief overwhelmed me, and it wasn't all about the money but control and self-trust in my financial future. This experience taught me the most valuable lesson: never lose control over your own financial security and never put blind trust in anyone. With Digital resolution services, I recovered not only my $532,000 but also learned how to protect my assets better in the future. Contact Digital Resolution Services: Email: digitalresolutionservices (@) myself. c o m WhatsApp: +1 (361) 260-8628 Stay protected Charles agrimes
18.03.25 23:49 lindaspringer311

My name is Linda Springer, and I am part of an ultra-high-net-worth family in the United Kingdom. Managing our wealth has always been a top priority, and I’ve always looked for opportunities to grow and diversify our investments. When I was introduced to an offshore banking investment program called Market Fund, it seemed like the perfect opportunity to enhance our portfolio. The program promised impressive returns, and with professional advisors and seemingly legitimate documentation, I felt confident that it was a secure investment. However, my trust in Market Fund quickly proved to be misplaced. Initially, everything seemed to go smoothly. Reports showed strong growth, and I was reassured by the continuous updates from the program’s advisors. But when I tried to withdraw my funds, everything took a sharp turn. The Market Fund website became unresponsive, and all my attempts to reach the advisors through emails and phone calls went unanswered. It was then that I realized I had fallen victim to a scam, and the £60,000 I had invested was gone. Feeling devastated and unsure of what to do next, I turned to a friend I had met at a club called The Vault. During one of our conversations, Alex, a fellow club-goer, mentioned how Rapid Digital Recovery had helped them recover funds from a similar fraudulent scheme. Intrigued by their success story, I decided to reach out to Rapid Digital Recovery....Whatsapp: +1 4 14 80 71 4 85.. hoping they could help me recover my money as well. From the moment I contacted them, the team at Rapid Digital Recovery took immediate action. They began investigating the scam and used advanced technology to trace the origins of Market Fund. Through their efforts, they uncovered a network of fake websites and shell companies that had been designed to deceive investors like myself. Thanks to their persistence and expertise, Rapid Digital Recovery successfully recovered the £60,000 I had lost.....Email: rapid digital recovery (@) execs. com.. Not only did they restore my financial security, but they also exposed the fraudulent operation behind Market Fund, preventing others from falling victim to the same scam. While the experience was incredibly stressful, it served as an important reminder of the need for due diligence and professional oversight when dealing with offshore investments. I am incredibly grateful to Rapid Digital Recovery for their support, expertise, and determination in recovering my funds. Telegram: h t t p s: // t. me /Rapiddigitalrecovery1
20.03.25 17:21 katherineingram

Dr. Katherine Ingram
20.03.25 17:21 katherineingram

CRYPTOCURRENCY RECOVERY FIRM \ FOLKWIN EXPERT RECOVERY. I, Dr. Katherine Ingram, had always been committed to giving my best to my patients in Melbourne, Australia. But everything changed when I was suddenly hit with a medical malpractice lawsuit. The stress and anxiety that came with the legal battle left me feeling overwhelmed, and I was desperate for a solution. In my search for help, I found "MedLegal Solutions," a firm that promised a quick and easy resolution for just $27,000 AUD. They assured me they would handle everything swiftly, easing my burden. Desperate to resolve the situation, I handed over the money, trusting them to take care of the rest. However, as the weeks turned into months, I heard nothing. Calls went unanswered, emails went ignored, and I began to feel more and more helpless. It became clear that something was wrong, and I realized I had been deceived. The more I tried to contact them, the more I found myself being ignored. I soon understood that I was much deeper than I had initially feared. That’s when I turned to Folkwin Expert Recovery for help. From the moment I contacted them, they sprang into action. They immediately began investigating MedLegal Solutions and quickly uncovered a massive web of deceit. It turned out that MedLegal Solutions wasn’t just an incompetent firm; it was part of an elaborate scam. They were operating under multiple false identities across Sydney, Brisbane, and regional Victoria, targeting vulnerable individuals like myself. Folkwin Expert Recovery didn’t just uncover the fraud, they took it one step further. They worked tirelessly with authorities in Melbourne to track down and dismantle the fraudulent operation. They didn’t rest until MedLegal Solutions was shut down for good, ensuring that no one else would fall victim to their schemes. Thanks to their expert recovery efforts, I was able to recover every single cent of my $27,000.This entire ordeal was a wake-up call for me. It was a difficult and stressful time, but ultimately, I came out victorious. Thanks to Folkwin Expert Recovery, not only did I get my money back, but I also found peace knowing that MedLegal Solutions was no longer in business and that their fraudulent operation had been dismantled. It was a painful lesson, but in the end, my finances were intact, and I could move forward with a sense of closure. FOLKWIN EXPERT RECOVERY DETAILS\\ Telegram: @Folkwin_expert_recovery Or Email: Folkwinexpertrecovery(@)tech-center DOT com Regards, Dr. Katherine Ingram.
20.03.25 19:34 ysabelbristol

I am YSABEL, a medical student living with my grandmother. For the past few years, I’ve been diligently saving my grandmother’s money to ensure she has a comfortable and secure future. I invested over $40,000 into an online platform, which promised significant returns. After completing several steps, they told me that to withdraw the money, I needed to make another payment of $73,000. As a medical student, my time is already stretched thin, and managing my grandmother’s finances on top of my studies was overwhelming. That's when a costudent, who had gone through a similar experience, recommended MUYERN TRUST HACKER. Initially, I was skeptical. After all, how could anyone help me recover the money I had already lost to such a sophisticated scam? But after reaching out to them, I quickly realized I was in good hands. From the very first conversation, the team at MUYERN TRUST HACKER was professional, compassionate, and knowledgeable. They understood the gravity of my situation and took the time to thoroughly review all the details of my case. They explained the recovery process clearly, step by step, and assured me that they would work tirelessly to help recover the funds I had lost. Their expertise in dealing with online fraud was evident, and for the first time in weeks, I felt a sense of hope that I could regain control over this situation. The recovery process wasn’t immediate, and there were moments of uncertainty, but MUYERN TRUST HACKER remained dedicated and persistent. As someone who has been working hard to save and protect my grandmother’s money, it was devastating to feel like I might lose everything to a scam. But MUYERN TRUST HACKER gave me the support, expertise, and guidance I needed to recover what was lost. I’m deeply grateful for their help, and I now have a renewed sense of hope that I can protect my grandmother’s future. If you find yourself in a similar situation, feeling trapped and overwhelmed by a fraudulent company, I highly recommend MUYERN TRUST HACKER. (Whats A p p at + 1 (440) (335) (0205) Their team provides real solutions, and their professionalism and dedication were a lifeline for me during a very difficult time. Thanks to them, I feel confident that I can move forward and continue to protect my grandmother’s savings. Alternatively, contact their tele gram also if you need immediate attention at muyerntrusthackertech.
21.03.25 21:19 carmenbeechum643

(Telegram: https:// t. me/Pro_ Wizard_ Gilbert_ Recovery) Email (pro wizard gilbert recovery (@) engineer. com) I never imagined I would fall victim to a cryptocurrency scam, but that's exactly what happened. My name is [Carmen Beechum, and I invested $500,000 into what | believed was a legitimate trading platform. Everything appeared professional-the website was well-designed, customer service was responsive, and my trading account even showed promising returns.It all seemed too good to be false.However, when I attempted to withdraw my funds, I was met with endless delays and excuses. First, they claimed there were technical issues, then they needed additional verification, and finally, they requested a release fee before processing my withdrawal. Despite complying with their demands, my account was eventually frozen, and all communication from the platform ceased. That's when reality hit me—l had been scammed out of half a million dollars. Desperate to find a way to recover my money, I searched online for solutions. That's when I came across PRO WIZARD GIlBERT RECOVERY, a company dedicated to helping victims of online financial fraud. At first, I was skeptical-after all, I had already been deceived once, and the last thing I wanted was to fall for another scam. But after speaking with their team and reviewing their success stories, I decided to take a chance.Their experts immediately got to work, using advanced blockchain forensics and investigative tools to trace my stolen funds. WhatsApp: +1 (920) 408‑1234 They identified the fraudulent wallets where my money had been transferred and collaborated with financial institutions and law enforcement agencies to take action. Thanks to their persistence and expertise, they were able to freeze the scammers' accounts and successfully recover my $500,000. What seemed like a devastating loss turned into a remarkable recovery. I am incredibly grateful to PRO WIZARD GIlBERT RECOVERY for not only retrieving my funds but also restoring my peace of mind. My experience serves as a warning to others-always be cautious with online investments, but if you ever become a victim, know that recovery is possible with the right experts on your side.
22.03.25 14:13 [email protected]

The glow of RGB lights still haunts me. There I was, mid-stream, hyping up a Fortnite squad when an email pretending to be a sponsorship opportunity with the subject line "ENERGY DRINK COLLAB!!! *" appeared on my second monitor. I clicked— big mistake. By the time my chat spammed "*SCAM ALERT" in neon caps, a trojan had already ghosted my Bitcoin wallet, $320,000 gone, poof, like a noob disconnecting mid-game. My facecam caught the exact moment my soul left my body: jaw open, headset tilted, the background of anime posters judging me silently. The VOD blew up. Of course, it did. Pandemonium erupted. Donation alerts became panic emojis. My mods DM'd links to "HOW TO FIX CRYPTO THEFT" amidst banning trolls. My wallet? A barren wasteland. My DMs? A cemetery of "*F"s and crypto-bros pitching recovery scams. Then, a lifeline—a chatter named *xX_Cryptosolution_69 typed, "TRUST GEEKS HACK EXPERT. THEY CLAPPED A HACKER FOR MY DOGE ONCE." Desperate, I Googled them mid-stream, muting to scream into a pillow. TRUST GEEKS HACK EXPERT team responded like NPCs scripted for heroics. “Send us the malware file,” they said. “**And your wallet logs. We’ll handle the rest.” For 12 days, they reverse-engineered the trojan, dissecting its code like speed runners cracking a glitch. The virus, it turned out, was a knockoff ransomware dubbed “Crypto rush” (its dev had left a “HACK THE PLANET!!” Easter egg in the code, cringe). TRUST GEEKS HACK EXPERT squad traced its path, resurrecting private keys from registry fragments and backup clouds I’d forgotten existed. The return stream was record-breaking. I rebooted my rig, wallet restored, and titled the stream "HOW I UNBRICKED $320K (AND MY CAREER)." Chatters donated Bitcoin out of solidarity, and schadenfreude. Even my rival streamer, DrL33tGamer, raided me with 10k viewers. TRUST GEEKS HACK EXPERT? They viewed anonymously and left a sub with the message: "GG EZ. These internet Gandalfs didn't just fix a hack—they authored the greatest plot twist in my online existence. Now, my new website, Stream Vault, runs on a server guarded like Fort Knox, and I vet sponsors like the CIA. That fake energy drink company? Its domain now points to a Rickroll. If your crypto gets pawned by a script kiddie, skip the rage quit. Ping the TRUST GEEKS. They're the ultimate cheat code for catastrophe. Just maybe have a malware scanner in closer proximity than your energy drinks next time. (CONTACT SERVICE ) Email, Trustgeekshackexpert[At]fastservice[Dot]com Telegram, Trustgeekshackexpert Email, [email protected] Website, www://trustgeekshackexpert.com
23.03.25 12:24 maryjul75

There are not many reviews about free crypto recovery fixed but the ones that exist are mostly positive. I have no idea how that is possible, but it is clear that they are fabricated. However, there are also negative reviews – and I highly recommend paying attention to them. These are real people describing their unfortunate experiences with this scam. It’s the same story as always – fraudsters create a fake website to con people out of money. Nothing new but look no more and contact FASTRECOVERYAGENT These types of scams are everywhere. If you have already lost money to scammers i mean any type be it sending to scammers account , or if you have a case about stolen bitcoin , usdt, or any type of cryptocurrency whatsoever just reach out to www.fastrecoveryagent.com, i really owe this group of recovery expert because they saved me after bad investment with a fake broker, i literally owe them my life as they saved me from some bunch of scammers, but see how life is , i got every cent of my investment back with the profit , reach out to to them today and tell them from Mary because i promise them i will tell the whole world when the recovery is complete, and here i go after i got my recovered assets thats why im doing what i promised. do not fall for another scam. contact the,m today!!!!
23.03.25 22:01 joaneldnde

The ground trembled like a nervous intern on espresso shots. One minute, I was monitoring my geothermal Bitcoin miners, humming in harmony with Iceland's most unpredictable volcano. Next? An eruption painted the sky gray with ash, raining destruction like an out-of-control blockchain fork. Power cables flickered out. Servers turned into abstract-art pieces. And my wallet with $460,000 worth of mining revenue fried faster than a motherboard in a tidal wave of lava. I was knee-deep in volcanic mud, clutching the charred wallet, wondering if the universe had a vendetta against renewable energy. For weeks, I’d played geothermal gambler, harnessing Earth’s anger to mine crypto. Now, Mother Nature had countered with a literal power move. My wallet’s backups? Corrupted by ash-clogged drives. My cold storage? Warmer than a freshly erupted fissure. Even the volcanologists on my team shrugged. “We predict lava, not ledger errors,” one said, handing me a business card signed at the edges. “Try these Cyber Constable Intelligence. They’ve fixed crypto in weird places.” Cyber Constable Intelligence phoned on the first ring. Cyber Constable Intelligence saved not just crypto. They demonstrated that even the fury of nature cannot surpass human tenacity. My operation now operates robustly, excavating coins with Earth's anger and a backup generator sufficient to run a small glacier. The volcano? Still grumbling. My wallet? Locked inside a fireproof safe, as irony bites sharper than an Icelandic winter. If your crypto somehow gets smothered beneath the pyroclastic ash of life, skip the freak-out. Call the Cybers. They'll dig through lava streams until your cash bubbles up to the surface. Just maybe set up your rigs a few miles closer to the crater next time. If you’re facing a similar problem I highly recommend contacting Cyber Constable Intelligence 📞 WhatsApp:+1 (2 5 2 ) 3 7 8 7 6 1 1 🌐 Website: www cyberconstableintelligence.com 📩 Telegram: https://t.me/cyberconstable
23.03.25 22:18 [email protected]

A few months ago, I stumbled upon a post about a cryptocurrency investment platform that I thought was a good idea for me to invest in crypto, I didn’t realize I was being catfished by the cryptocurrency investment manager who promised me huge returns on my investment. I lost my capital of $170,000 and interest without receiving any profits in return, I was devastated And I realized I had been scammed out of my cryptocurrency. I felt hopeless and didn’t know where to turn. i searched everywhere for a solution and That’s when my friend introduced me to a Crypto recovery platform Trust Geeks Hack Expert. At first, I was skeptical—after all, I had just been scammed—but Trust Geeks Hack Expert professionalism and transparency reassured me. They took the time to analyze my case, track my lost funds, and guide me through the recovery process. To my amazement, they successfully retrieved my stolen crypto! I can’t express how grateful I am to Trust Geeks Hack Expert team. Their expertise and dedication gave me a second chance. If you’ve been a victim of a crypto scam, don’t lose hope—Trust Geeks Hack Expert. is the real deal! for assistance, Email: [email protected] (TeleGram:: Trustgeekshackexpert) & what's A p p +1 7 1 9 4 9 2 2 6 9 3
24.03.25 10:03 Diegolola514gmail.com

"I am incredibly grateful to Sylvester Bryant for his exceptional expertise and assistance in recovering my USDC funds, which were lost to a phishing scam. Thanks to his diligent efforts, he successfully retrieved €480,000 worth of USDC that I thought was gone forever. If you or anyone you know has fallen victim to a similar situation, I highly recommend reaching out to Sylvester for professional assistance. You can contact him via email at Yt7cracker@gmail. com or through WhatsApp/text message at +1 512 577 7957. He is truly a reliable and skilled professional in recovering assets from online scams."
25.03.25 18:06 maryjul75

Fast Agent Recovery is a consulting firm that specializes in the recovery of assets from financial fraud. We know how to recover your funds and we have helped thousands of scam victims from around the world to recover their money. If you are a victim of Binary Options fraud, Forex fraud, Bitcoin fraud, Dating scams or one of the many other the online fraudulent practices that permeate the internet then file a complaint on www.fastrecoveryagent,.com to get an assessment if we can help you get your money back too. File a complaint: https://www.fastrecoveryagent.com/
27.03.25 01:52 debrapavon89

The moment my cold storage device flatlined, erasing $385,000 in Bitcoin I’d saved to launch a chain of zero-waste cafés, I became a ghost haunting my own life. I scrolled through forums until my eyes were streaming, trawling through threads filled with such mouthfuls as "irreversible blockchain entropy" and "cryptographic oblivion A Reddit thread finally revealed to me Cyber Constable Intelligence I reached out, the team at Cyber Constable Intelligence took immediate action. They began tracing the fraudulent car auction site and thoroughly investigating the scam. To my relief, after several weeks of hard work, Cyber Constable Intelligence successfully tracked down the scammers and recovered the full $385,000 I had lost. Their hard work allowed me to move on from this unfortunate experience, I highly recommend their services to anyone who has been affected by online fraud Reach out to their Info below WhatsApp: 1 252378-7611 Website info; www.cyberconstableintelligence.com
30.03.25 03:25 orrinharber

The ad on X (formerly Twitter) popped up on my timeline one lazy Sunday afternoon. It was flashy, bold, and impossible to ignore. The headline read, “ONCE-IN-A-LIFETIME COMEDY EXTRAVAGANZA!” with a dazzling graphic of a stage lit up in neon lights. The caption said: “Kevin Hart, Ali Wong, Dave Chappelle, and a MYSTERY LEGENDARY COMEDIAN live in Vegas! Limited VIP tickets available. Don’t miss out!” The post had thousands of likes, retweets, and comments like, “This is going to be epic!” and “Already got my ticket!” It even had a blue checkmark next to the account name, which made it seem legit. I clicked the link, and it took me to a sleek website with a countdown timer and a list of sold-out ticket tiers. The only option left was a $125,000 VIP package, which promised front-row seats, backstage access, and a meet-and-greet with the comedians. I hesitated for a moment, but the fear of missing out got the better of me. I thought, When will I ever get a chance like this again? So, I entered my credit card details and hit “Purchase.” The confirmation email came through instantly, and I felt a rush of excitement. Little did I know, I’d just fallen for one of the most elaborate scams I’d ever encountered. Looking back, I should’ve noticed the red flags the overly pushy tone of the ad, the lack of reviews for the event, and the fact that no official accounts from the comedians promoted it. But in the moment, it all seemed so real.I had been swept up by the flashy ad, the excitement of the event, and the FOMO (fear of missing out) that made it seem like an opportunity I couldn’t let slip by. Everything about the ad screamed “exclusive” and “once-in-a-lifetime,” which was enough to convince me to take the plunge. Yet, as time went on and I tried to follow up on the event, I found there was no trace of it anywhere. There were no details, no event pages, and no mention from the comedians themselves. My heart sank as I realized I had been scammed.Thankfully, GRAYWARE TECH SERVICES helped me get my money back, but the experience was a hard lesson in online scams. I’ll never forget that ad on X the one that cost me $125,000 and a whole lot of pride. I learned the importance of being cautious online, checking for reviews, and looking for signs of authenticity before jumping into anything that seems too good to be true.You can reach GRAYWARE TECH SERVICES on web at ( https://graywaretechservices.com/ ) also on Mail: ([email protected])
30.03.25 06:22 grace111

I recommend Marie ([email protected] and WhatsApp: +1 7127594675) for recovering lost or stolen bitcoin, USDT, or any other cryptocurrency from fraudulent investment sites because they are very knowledgeable in the industry and will reimburse all of your money. I can say with confidence that she was the only one who was able to credit my account with $52,760 of the money that had gone missing, based on my prior transactions with them. She was the only one who could. Since they are the only ones that can fully return your missing funds to your account without any deductions, I sincerely appreciate their job and am recommending her to you today.
31.03.25 11:00 maryjul75

Fast Agent Recovery is a consulting firm that specializes in the recovery of assets from financial fraud. We know how to recover your funds and we have helped thousands of scam victims from around the world to recover their money. If you are a victim of Binary Options fraud, Forex fraud, Bitcoin fraud, Dating scams or one of the many other the online fraudulent practices that permeate the internet then file a complaint on www.fastrecoveryagent,.com to get an assessment if we can help you get your money back too. File a complaint: https://www.fastrecoveryagent.com/