Comparison and Noise Suppression of the Transmitted and Reflected Photoplethysmography Signals

Figure 4

The denoising results by using the method based on double median filters: (a) TPPGS and the noise (red curve), (b) DTPPGS, (c) TPPGM and the noise (red curve), (d) DTPPGM, (e) RPPGS and the noise (red curve), (f) DRPPGS, (g) RPPGM and the noise (red curve), and (h) DRPPGM.

(a)

(b)

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(d)

(e)

(f)

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(h)