Abstract
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.
Highlights
normal-to-normal interval (NNI) and Pulse rate variability (PRV) indicator values of contact PPG (CPPG) signals, which were tested for ground-truth
To confirm that PRV analysis using lab-based remote PPG (RPPG) showed the same quality as PRV analysis using CPPG, a study was conducted to compare the PRV analysis between
PRV analysis was performed using the NNI obtained through each blood volume pulse (BVP) signal processing process
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. PRV has been mainly used in recent years in the healthcare field to predict and diagnose diseases, assess stress levels, and analyze sleep stages [1,2,3,4,5,6]. The autonomic nervous system (ANS) changes according to the changes in the internal/external environment, and the changes in pulse rate (PR) caused by such changes caused by the ANS are referred to as PRV [3]. PRV is related to the interactions between the sympathetic and parasympathetic nerves that affect the sinus node and reflects transient PR and peak-to-peak interval (PPI)
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