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Table 1 Summary of the measurement set-up, signal domain analysis and results of reference works

From: Video pulse rate variability analysis in stationary and motion conditions

References Activity condition/method Subj.
N
Recording time Resolution (fps) Signal analysis Overall results
[13] 1 = sitting still
2 = natural movements (no large or rapid movements)
12 1 min 640 × 480
(15 fps)
FD
[16] 1 = sitting still
2 = natural human-computer interaction
10 (1) 1 min
(2) 20 min
640 × 480
(30 fps)
FD
[17] Sitting still in front of a laptop 12 1 min 640 × 480
(15 fps)
TD, FD
[18] Resting conditions (palm of the subject’s hand) 10 4 min 384 × 256
(200 fps)
TD, FD
[19] 1 = sitting at rest
2 = sitting under stress
(1) 9
(2) 10
2 min 960 × 720
(30 fps)
TD, FD
[20] 1 = sitting at rest
2 = sitting under stress
11 2 min 960 × 720
(30 fps)
TD
[21] 1 = supine position
2 = sitting position (controlled illumination, synchronized breathing and eyes closed)
(1) 12
(2) 8
5 min 640 × 480
(30 fps)
TD, FD
[22] Sitting still in front of a camera
(1 = ICA-based method
2 = EVM-based method)
12 2 min 720 × 480
(30 fps)
TD, FD
[23] 1 = sitting still and calm
2 = sitting with pre-defined head movements
12 35 s 320 × 240
(30 fps)
TD
[24] 1 = stationary
2 = reading
3 = watching video
4 = talking
5 80 s 1280 × 1024
(30 fps)
TD
[25] 1 = sitting still
2 = reading without motion
3 = reading without further instructions
4 2 min 800 × 600
(30 fps)
TD
[26] 1 = static
2 = static with makeup
3 = occasional motion
4 = frequent motion
(1) 4
(2) 3
(3) 3
(4) 2
1 min 640 × 480
(30 fps)
TD
  1. FD frequency-domain, TD time-domain (NN or PP time series), r Pearson correlation coefficient, ρ c concordance correlation coefficient, n.u. normalized units
  2. * p < 0.001; only for the acquisition of frequency-domain parameters of HRV; PRV: pulse rate variability (time series between consecutive pulse beats). The MAE results from [25, 26] are calculated in this work to obtain a mean value of the individual results (note: the recordings of the occasional and frequent motion categories [26] were performed by the same subject). For comparison purposes, only were included the parameters that were calculated in our study