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. 2016 Apr 6;7(5):1737–1754. doi: 10.1364/BOE.7.001737

Fig. 3.

Fig. 3

Framework of the proposed motion robust PPG-imagers. After frame preprocessing, remote-PPG (rPPG) signals are acquired in each sensor-element, mapped according to CHROM or PBV algorithms (gray box), and correlated with a reference PPG signal from the palm. The instantaneous pulse-rate is obtained by contact PPG (cPPG).