Table 5. Quality metrics for iPPG-based pulse rate estimates.

Error was calculated as the difference between videoPR and refPR; the Pearson correlation coefficient was computed between videoPR and refPR across epochs in each session. To facilitate interpretation of the results and comparison with previous studies [41, 45–47], we also present percentages of epochs with estimation error in certain range.

Session	Animal	Number of epochs	Mean absolute error, BPM	Epochs with absolute error below				Correlation
				3.5 BPM	7 BPM	5%	10%
1	Sun	23	2.32	74%	100%	87%	100%	0.88
2	Sun	16	3.95	69%	75%	75%	94%	0.52
3	Fla	26	2.81	69%	96%	96%	100%	0.74
4	Fla	15	4.32	60%	80%	80%	93%	0.02
5	Mag	19	3.78	58%	89%	95%	100%	0.92
6	Mag	8	2.16	75%	100%	100%	100%	0.98
7	Mag	48	7.01	31%	56%	67%	98%	0.85
8	Lin	12	3.98	50%	83%	92%	100%	0.88