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. 2021 Feb 10;26(2):022707. doi: 10.1117/1.JBO.26.2.022707

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© 2021 The Authors

Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Fig. 5 — SNR of the iPPG signal for 60-s video computed with chrominance and distancePPG. Each scenario consists of 32 videos. The number of data point for low SNR regions is higher for the talking scenario.