Table 2.

Results for respiratory rate estimation (n = 16) using frontal view acquisitions.

Subject	Mean HR		RMSE (Breaths/Min)	$\overline{\mathit{\epsilon }}$	${\mathit{\epsilon }}_{90}$
	GT (Breaths/Min)	IRT (Breaths/Min)
Subject 1	13.94	13.51	1.28	0.07	0.13
Subject 3	15.46	15.34	0.46	0.02	0.05
Subject 4	15.52	15.15	0.96	0.05	0.09
Subject 5	13.10	13.16	0.59	0.03	0.08
Subject 6	20.62	20.73	0.57	0.02	0.06
Subject 7	9.04	9.10	0.24	0.02	0.05
Subject 8	12.78	12.43	0.62	0.03	0.05
Subject 9	14.21	14.13	0.58	0.03	0.06
Subject 10	18.15	17.77	1.13	0.05	0.11
Subject 11	19.39	19.43	0.70	0.03	0.05
Subject 12	9.70	9.62	0.77	0.05	0.14
Subject 14	8.79	9.10	0.81	0.05	0.10
Subject 16	17.33	17.26	1.52	0.07	0.15
Subject 17	19.33	19.57	0.74	0.03	0.07
Subject 18	21.20	21.09	0.48	0.02	0.04
Subject 20	15.71	15.81	0.47	0.02	0.04
Mean ± SD	15.36 ± 3.95	15.31 ± 3.93	0.71 ± 0.30	0.03 ± 0.01	0.08 ± 0.03

GT—ground truth, $\overline{\epsilon }$—mean relative error, ${\epsilon }_{90}$—90th percentile of the relative errors.