Figure 3
From: New insights into the origin of remote PPG signals in visible light and infrared
Processing pipeline: (1, 2) Remote-PPG signals acquired at the finger pad are low-pass-filtered and AC/DC-normalized; (3, 4) The AC/DC streams are ensemble-averaged (EA) (template size, 31 samples per cardiac cycle), including (e) multiple of the pulse-rate frequency and (f,g) the fundamental only.
