Comparative Study of rPPG-Based Methods Performance at the Various Skin Tones

Abstract

A comparative study is conducted to understand the rPPG-based method's performance across various skin tones corresponding to different regions; Indonesian (Sub1), Thai (Sub2), and Japanese (Sub3). The rPPG-based methods such as PCA, ICA, PBV, CHROM, POS, LGI, GREEN are compared. The evaluation methods used for the comparison with the ground truth data are the dynamic time wrapping (DTW) and Pearson correlation (r) for the HRV signal, and mean absolute error (MAE), mean square error (MSE), and root mean square error (RMSE) for the BPM value. The results show that the CHROM method is able to generate HRV with high signal quality and BPM reliability.