Fig. 1From: Remote photoplethysmography with constrained ICA using periodicity and chrominance constraintsWindow-wise weight analysis showing ICA weights and HR in a and b vs cICA weights and HR in c, d. For the exact same data, different values of \(\mathbf {w}=|w_R,w_G,w_B|\) corresponding to the RGB channels can extract an accurate rPPG signal. Absolute values of the weights are shown for concise displayBack to article page