Comparison and Noise Suppression of the Transmitted and Reflected Photoplethysmography Signals

Figure 5

Comparisons of spectral analysis before and after denoising: (a) spectrum of TPPGS, (b) spectrum of DTPPGS, (c) spectrum of TPPGM, (d) spectrum of DTPPGM, (e) spectrum of RPPGS, (f) spectrum of DRPPGS, (g) spectrum of RPPGM, and (h) spectrum of DRPPGM.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)