Table 4. Results for heart rate estimation in videos from rats.

Rodent ID	Mean HR (breaths/min)		RMSE	$\overline{\epsilon }$ (%)	${\epsilon }_{90}$ (%)	Correlation
	IMG	REF	(breaths/min)
R1	361.42	361.23	0.73	0.16	0.36	0.83
R2	319,80	319,37	0.61	0.16	0.33	0.98
R3	324.43	323.46	1.45	0.36	0.79	0.90
R4	390.42	389.37	2.10	0.41	0.93	0.88
R5	418.58	416.84	1.86	0.41	0.65	0.94
R6	426.38	426.49	0.95	0.19	0.38	0.64
Mean±SD	373.51±45.94	372.79±45.87	1.28±0.62	0.28±0.13	0.57±0.25	0.86±0.12

IMG: Image-derived, REF: Reference Measurement, $\overline{\epsilon }$: mean relative error, ${\epsilon }_{90}$: 90th percentile of the relative errors