Pulse rate variability (PRV) refers to the change in the interval between pulses in the blood volume pulse (BVP) signal acquired using photoplethysmography (PPG). PRV is an indicator of the health status of an individual’s autonomic nervous system. A representative method for measuring BVP is contact PPG (CPPG). CPPG may cause discomfort to a user, because the sensor is attached to the finger for measurements. In contrast, noncontact remote PPG (RPPG) extracts BVP signals from face data using a camera without the need for a sensor. However, because the existing RPPG is a technology that extracts a single pulse rate rather than a continuous BVP signal, it is difficult to extract additional health status indicators. Therefore, in this study, PRV analysis is performed using lab-based RPPG technology that can yield continuous BVP signals. In addition, we intended to confirm that the analysis of PRV via RPPG can be performed with the same quality as analysis via CPPG. The experimental results confirmed that the temporal and frequency parameters of PRV extracted from RPPG and CPPG were similar. In terms of correlation, the PRVs of RPPG and CPPG yielded correlation coefficients between 0.98 and 1.0.

中文翻译：

---

使用远程光电容积脉搏波信号进行速率变异性分析

脉搏率变异性 (PRV) 是指使用光电容积脉搏波 (PPG) 获取的血容量脉冲 (BVP) 信号中脉冲之间的间隔变化。PRV是个人自主神经系统健康状况的指标。测量 BVP 的代表性方法是接触式 PPG (CPPG)。CPPG 可能会给用户带来不适，因为传感器附在手指上进行测量。相比之下，非接触式远程 PPG (RPPG) 使用相机从面部数据中提取 BVP 信号，无需传感器。但是，由于现有的 RPPG 是提取单个脉率而不是连续的 BVP 信号的技术，因此很难提取额外的健康状态指标。因此，在本研究中，PRV 分析是使用基于实验室的 RPPG 技术进行的，该技术可以产生连续的 BVP 信号。此外，我们打算确认通过 RPPG 的 PRV 分析可以以与通过 CPPG 的分析相同的质量进行。实验结果证实，从RPPG和CPPG中提取的PRV的时间和频率参数相似。在相关性方面，RPPG 和 CPPG 的 PRV 产生的相关系数在 0.98 和 1.0 之间。