由可见光谱视频中提取心率的对角累积量法

王蒙军; 王楠; 王霞; 付晓静; 李刚

doi:10.3788/OPE.20152309.2698

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由可见光谱视频中提取心率的对角累积量法

信息科学 | 更新时间：2020-08-12

- 由可见光谱视频中提取心率的对角累积量法
- Extracting heart rate from visible spectrum video based on diagonal cumulant algorithm
- 光学精密工程 2015年23卷第9期页码：2698-2707
- 作者机构：
  
  1. 河北工业大学电子信息工程学院天津,300401
  2. 天津大学精密仪器与光电子工程学院天津,300072
- 作者简介：
- 基金信息：
  
  河北省高等学校自然科学研究重点基金资助项目(No.ZD20131043)();河北省高等学校高层次人才科学研究基金资助项目(No.GCC2014011)();天津市自然
- DOI：10.3788/OPE.20152309.2698
  中图分类号： R540.4;TP391.41
- 收稿日期：2015-04-10，
  
  修回日期：2015-06-09，
  
  纸质出版日期：2015-09-25
- 稿件说明：
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王蒙军, 王楠, 王霞等. 由可见光谱视频中提取心率的对角累积量法[J]. 光学精密工程, 2015,23(9): 2698-2707

WANG Meng-jun, WANG Nan, WANG Xia etc. Extracting heart rate from visible spectrum video based on diagonal cumulant algorithm[J]. Editorial Office of Optics and Precision Engineering, 2015,23(9): 2698-2707
王蒙军, 王楠, 王霞等. 由可见光谱视频中提取心率的对角累积量法[J]. 光学精密工程, 2015,23(9): 2698-2707 DOI： 10.3788/OPE.20152309.2698.

WANG Meng-jun, WANG Nan, WANG Xia etc. Extracting heart rate from visible spectrum video based on diagonal cumulant algorithm[J]. Editorial Office of Optics and Precision Engineering, 2015,23(9): 2698-2707 DOI： 10.3788/OPE.20152309.2698.

摘要

由于使用经典的联合近似特征对角化(JADE)算法从视频中估计光电容积脉搏波(Photoplethysmography

PPG)信号

再经快速傅里叶变换转化成的心率值与真实心率值的误差较大

本文提出使用基于对角累积量算法从视频中分离PPG信号

再经过快速傅里叶变换转换成心率的方法来提高心率测量的准确性。进行了从RGB彩色可见光视频信号中恢复心率值的实验。对比实验表明

基于对角累积量分离算法所得心率值与真实心率值差的绝对值的统计特征参数较JADE算法均有所降低

均值、标准差、均方根误差平均分别下降1.46

4.98和4.49。通过Bland-Altman图的分析表明

在95%的置信区间内

对角累积量算法所得心率的浮动范围较JADE算法减小了2倍以上

显示对角累积量算法具有更高的估计精度

对肤色亮度和外界自然光的要求更低

通过调整参数值

可使运行时间控制在1 s之内

基本满足实时提取心率的要求。

Abstract

Photoplethysmography(PPG) signal is usually acquired from a video image by using the classic Joint Approximate Diagonalization of Eigenmatrices(JADE) algorithm

and the heart rate is extracted from PPG signal using Fast Fourier Transform. However

the obtained value has larger deviation with the actual heart rate value. To improve the accuracy of measured results

a new blind source separation algorithm was proposed. The algorithm used diagonal cumulant to separate the PPG signal

and took the Fast Fourier Transform to extract the heart rate. Experiments were carried out by utilizing visible spectrum color video. Compared with the JADE algorithm

the results show that statistical parameter values of the absolute difference between heart rate values extracted from the diagonal cumulant algorithm and the actual heart rate values are decreased. The mean value

standard deviation

and root-mean-square deviation has reduced by 1.46

4.98 and 4.49

respectively. By analytical form of the Bland-Altman graph

the floating range of diagonal cumulant algorithm reduces more than twice as compared with the JADE method in a 95% confidence interval. It suggests that diagonal cumulant algorithm provides higher estimated accuracy

and relies less on intensity of skin and natural light. The calculation time can also be controlled less than 1 s after dramatically reducing the iterations by adjusting the parameter values in diagonal cumulant algorithm

which meets the demand of real-time electrocardiogram signal extraction.

关键词

Keywords

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