Chinese Optics, Volume. 15, Issue 6, 1350(2022)

Image photoplethysmography for mental stress detection

Zhi RAO1, Bing-lin LI1, Ya-ru SUI1, Xiao-qiang JI1、*, and Ming-ye LI2,3
Author Affiliations
  • 1School of Life Science and Technology, Changchun University of Science and Technology, Changchun 130022, China
  • 2Department of Information Systems and Business Analytics, RMIT University, Melbourne 3001, Australia
  • 3School of Computing and Information Systems, The University of Melbourne, Melbourne 3053, Australia
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    Figures & Tables(7)
    Schematic diagram of iPPG principle
    Result of iPPG signal processing. (a) iPPG signal extraction process; (b) dynamic ROI extraction process; (c) iPPG signal extracted by different ROI; (d) extraction process in R-R interval
    Stress-induced test and result. (a) Stress induction test process; (b) box diagram of HRV characteristic parameter change
    Daily mental stress detection system. (a) Process of daily mental stress detection system; (b) accuracy comparison of daily mental stress detection by different machine learning classifiers; (c) a random forest-based model for detecting daily mental stress; (d) ROC curves for daily mental stress detection based on random forest
    • Table 1. HRV characteristics

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      Table 1. HRV characteristics

      HRV特征单位定义
      HRbmp心率
      SDNNmsR-R间期的标准偏差
      PNN50%平均R-R间期大于50 ms占总数的百分比
      PNN20%平均R-R间期大于20 ms占总数的百分比
      RMSSDms相邻R-R间期的不同平方的平均和的平方根
      SDSDms相邻R-R间期之差的标准偏差
      CVSD连续差异的变化系数
      CVnni变异系数
      std_hrbmp心率标准差
      TPms20~0.4 Hz,总光谱能量
      LFnu%0.04~0.15 Hz,标准化的低频功率
      HFnu%0.15~0.4 Hz,标准化的高频功率
      LF/HF低频与高频的比例
      SD1ms垂直于方程线的直线上的Poincaré图的标准偏差
      SD2ms沿着Poincaré图表中标记线的标准偏差
      SD2/SD1SD2与SD1之比
      Sampen数据的样本熵
    • Table 2. Description of the test

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      Table 2. Description of the test

      精神 压力诱导实验 日常 精神压力实验
      实验对象学生老师和学生
      数量3067
      年龄(min/max)17/2619/49
      身体状况健康健康
    • Table 3. Comparison of pressure detection-related work

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      Table 3. Comparison of pressure detection-related work

      Healey[13]Kaur[17][20]本文
      实验对象司机志愿者学生学生和老师
      样本数量112157367
      年龄(min/max)18/5023/2819/49
      传感器接触式 传感器 特定相机普通相机智能手机
      特征HRV(6)HRV(9)& Expression(1) HRV(14)
      分类器LDA and LR(3)SVM(2)RF(3)
      测量方式接触式非接触式非接触式非接触式
      准确率97.4%75.0%81.4%95.2%
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    Zhi RAO, Bing-lin LI, Ya-ru SUI, Xiao-qiang JI, Ming-ye LI. Image photoplethysmography for mental stress detection[J]. Chinese Optics, 2022, 15(6): 1350

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    Paper Information

    Category: Original Article

    Received: Aug. 10, 2022

    Accepted: --

    Published Online: Feb. 9, 2023

    The Author Email:

    DOI:10.37188/CO.2022-0180

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