Calculation of Heartbeat Rate and SpO(2) Parameters Using a Smartphone Camera: Analysis and Testing.
Calculation of Heartbeat Rate and SpO(2) Parameters Using a Smartphone Camera: Analysis and Testing.
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DOI：
10.3390/s23020737
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发表时间：
2023-01-09
期刊：
影响因子：
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通讯作者：
Polycarpou AC
中科院分区：
文献类型：
--
作者：
Antoniou P;Nestoros M;Polycarpou AC
数学和信号处理方法被用来获得可靠的测量心跳脉搏率和血液中的氧浓度的信息，使用短视频记录的食指连接到智能手机内置摄像头。各种类型的智能电话与不同的操作系统一起使用（例如，iOS、Android）和功能。一系列的处理算法应用于红-绿-蓝（RGB）分量信号，包括平均强度计算，移动平均平滑，和基于Savitzky-Golay滤波器的二次滤波。两种方法-梯度和局部最大值法-被用来确定脉搏率，这提供了类似的结果。将快速傅立叶变换应用于信号以使信号的频率分量与脉搏率相关。我们将信号分解为DC和AC分量，以计算红色和绿色信号的AC和DC分量的比率，这是一种经常用于估计血液中氧浓度的方法。对健康人类受试者进行了一系列测量，产生了可靠的数据，与商业和医学批准的血氧计获得的基准数据相比，这些数据更为有利。此外，研究了录像持续时间对结果准确性的影响。
Mathematical and signal-processing methods were used to obtain reliable measurements of the heartbeat pulse rate and information on oxygen concentration in the blood using short video recordings of the index finger attached to a smartphone built-in camera. Various types of smartphones were used with different operating systems (e.g., iOS, Android) and capabilities. A range of processing algorithms were applied to the red-green-blue (RGB) component signals, including mean intensity calculation, moving average smoothing, and quadratic filtering based on the Savitzky–Golay filter. Two approaches—gradient and local maximum methods—were used to determine the pulse rate, which provided similar results. A fast Fourier transform was applied to the signal to correlate the signal’s frequency components with the pulse rate. We resolved the signal into its DC and AC components to calculate the ratio-of-ratios of the AC and DC components of the red and green signals, a method which is often used to estimate the oxygen concentration in blood. A series of measurements were performed on healthy human subjects, producing reliable data that compared favorably to benchmark data obtained by commercial and medically approved oximeters. Furthermore, the effect of the video recording duration on the accuracy of the results was investigated.
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影响因子：
5.1
作者：
Guede-Fernandez, Federico;Ferrer-Mileo, Victor;Fernandez-Chimeno, Mireya
通讯作者：
Fernandez-Chimeno, Mireya
DOI：
10.1109/jbhi.2018.2887209
发表时间：
2019-11-01
影响因子：
7.7
作者：
Ding, Xinyi;Nassehi, Damoun;Larson, Eric C.
通讯作者：
Larson, Eric C.
DOI：
10.1109/tbme.2011.2163157
发表时间：
2012-02
期刊：
IEEE transactions on bio-medical engineering
影响因子：
--
作者：
Scully CG;Lee J;Meyer J;Gorbach AM;Granquist-Fraser D;Mendelson Y;Chon KH
通讯作者：
Chon KH
影响因子：
4.1
作者：
Nam Bui;Anh Nguyen;Tam Vu
通讯作者：
Tam Vu
DOI：
10.1109/embc.2018.8513286
发表时间：
2018-07-01
期刊：
Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
影响因子：
--
作者：
Holz, Christian;Ofek, Eyal
通讯作者：
Ofek, Eyal