Table 5. Results in three different scenarios.

	$Frame\mathrm{\_}num$	$Center\mathrm{\_}num$	$In\mathrm{\_}num$	$Center\mathrm{\_}rate$ $\left(\mathrm{\%}\right)$	$In\mathrm{\_}rate$ $\left(\mathrm{\%}\right)$
Video	Recorded in the conference room
Video1	1,355	920	1,250	67.89	92.25
Video2	1,840	1,160	1,625	63.03	88.31
Video3	2,320	1,525	2,105	65.72	90.73
Video4	1,785	1,150	1,595	64.43	89.36
Video5	2,585	1,710	2,320	66.15	89.75
Video6	2,465	1,595	2,230	64.71	90.47
Average	2,058	1,343	1,854	65.32	90.15
Video	Recorded in the laboratory
Video7	1,300	810	1,150	62.30	88.46
Video8	2,390	1,525	2,035	63.81	85.15
Video9	2,030	1,245	1,775	61.33	87.44
Video10	1,985	1,090	1,670	54.91	84.13
Video11	2,230	1,255	1,905	56.28	85.43
Video12	1,920	1,135	1,685	59.11	87.76
Average	1,976	1,176	1,703	59.62	86.40
Video	Recorded in the classroom
Video13	1,200	785	1,095	65.42	91.25
Video14	1,345	870	1,235	64.68	91.82
Video15	2,175	1,285	1,875	59.08	86.21
Video16	2,670	1,665	2,435	62.36	91.20
Video17	2,370	1,435	2,075	60.55	87.55
Video18	1,875	1,130	1,660	60.27	88.53
average	1,939	1,195	1,729	62.06	89.42