Table 2 Statistical results of the PP measurements obtained by the cameras (\(\overline{x} \pm s, N = 5\))

0.812 ± 0.130

0.796 ± 0.146

23.59 ± 8.02 ms

2.83 ± 0.74

35.91 ± 22.50 ms

(2.11 ± 0.65 bpm)

(3.11 ± 1.18 bpm)

0.955 ± 0.020

0.954 ± 0.020

11.70 ± 3.92 ms

1.44 ± 0.60

16.02 ± 6.85 ms

(1.08 ± 0.55 bpm)

(1.48 ± 0.88 bpm)

0.764 ± 0.119

0.737 ± 0.142

32.76 ± 8.60 ms

3.77 ± 1.16

44.31 ± 16.11 ms

(2.59 ± 0.91 bpm)

(3.49 ± 1.58 bpm)

0.958 ± 0.017

0.957 ± 0.017

13.23 ± 4.52 ms

1.54 ± 0.59

16.76 ± 5.52 ms

(1.09 ± 0.48 bpm)

(1.39 ± 0.59 bpm)