Fig. 4
From: Remote photoplethysmography with constrained ICA using periodicity and chrominance constraints
Utility of the combination of periodicity and chrominance constraints in a fitness scenario. a LIGHT, b CHROM, c CICA with periodicity constraint, d CICA with periodicity and chrominance Constraints, e MEDIUM, f CHROM, g CICA with periodicity constraint, h CICA with periodicity and chrominance constraints, i INTENSIVE, j CHROM, k CICA with periodicity constraint, l CICA with periodicity and chrominance constraints