A novel iPPG method using Hue was more accurate for measuring heart rate from facial video compared to the Green channel (RMSE 0.8887 vs 0.9068).
Cross-Sectional (n=25)
Does an iPPG method using Hue improve the accuracy of heart rate and respiratory rate monitoring from facial video compared to the Green channel in healthy individuals?
A novel iPPG method using Hue variations from facial video provides more accurate heart rate and respiratory rate measurements than the traditional Green channel approach.
Absolute Event Rate: 0.8887% vs 0.9068%
. In this pilot study, we have introduced a novel iPPG method where by measuring variations in color of reflected light, i.e., Hue, and can therefore measure both HR and respiratory rate (RR) from the video of a subject's face. This paper was performed on 25 healthy individuals (Ages 20-30, 15 males and 10 females, and skin color was Fitzpatrick scale 1-6). For each subject we took two 20 second video of the subject's face with minimal movement, one with flash ON and one with flash OFF. While recording the videos we simultaneously measuring HR using a Biosync B-50DL Finger Heart Rate Monitor, and RR using self-reporting. This paper shows that our proposed approach of measuring iPPG using Hue (range 0-0.1) gives more accurate readings than the Green channel. HR/Hue (range 0-0.1) (Formula: see text, Formula: see text-value = 4.1617, and RMSE = 0.8887) is more accurate compared with HR/Green (Formula: see text, Formula: see text-value = 11.60172, and RMSE = 0.9068). RR/Hue (range 0-0.1) (Formula: see text, Formula: see text-value = 0.2885, and RMSE = 3.8884) is more accurate compared with RR/Green (Formula: see text, Formula: see text-value = 0.5608, and RMSE = 5.6885). We hope that this hardware agnostic approach for detection of vital signals will have a huge potential impact in telemedicine, and can be used to tackle challenges, such as continuous non-contact monitoring of neo-natal and elderly patients. An implementation of the algorithm can be found at https://pulser.thinkbiosolution.com.
Sanyal et al. (Mon,) conducted a cross-sectional in Healthy individuals (n=25). iPPG method using Hue vs. Green channel was evaluated on Heart rate measurement accuracy (RMSE). A novel iPPG method using Hue was more accurate for measuring heart rate from facial video compared to the Green channel (RMSE 0.8887 vs 0.9068).