TABLE 2.

Performace evaluation of face detection, bite count and chew count scheme.

Subject	No. of Image Frames	No. of detected face frames	No. of face detection accuracy (%)	Automatic Chew Count	Manual Chew Count	Accuracy (%)	Automatic Bite Count	Manual Bite Count	Accuracy (%)
Sub01	15014	14972	99.7	1500	1595	94.04	52	60	86.67
Sub02	15084	14972	99.3	1500	1594	94.10	52	56	92.86
Sub03	11474	11378	99.2	1056	1049	99.33	44	39	87.18
Sub04	14361	14291	99.5	1205	1153	95.49	67	60	88.33
Sub05	17770	17727	99.8	1324	1199	89.57	63	57	89.47
Sub06	15414	15369	99.7	1647	1313	74.56	70	65	92.31
Sub07	17972	17853	99.3	2040	1979	96.92	92	87	94.25
Sub08	18426	18341	99.5	2120	2056	96.89	108	106	98.11
Sub09	5810	5760	99.1	648	687	94.32	23	22	95.45
Sub10	9294	9229	99.3	777	713	91.02	49	53	92.45
Subll	13449	13359	99.3	1059	926	85.64	54	52	96.15
Subl2	7497	7482	99.8	572	538	93.68	35	31	87.10
Sub13	10028	9877	98.5	1003	935	92.73	54	52	96.15
Subl4	12472	12429	99.7	1545	1523	98.56	65	61	93.44
Sub15	10098	10009	99.1	1174	1220	96.23	52	52	100.00
Subl6	14380	14318	99.6	1781	1733	97.23	91	94	96.81
Subl7	179531	178526	99.4	20273	19844	97.84	932	940	99.15
Subl8	11523	11469	99.5	1517	1678	90.41	75	84	89.29
Subl9	15206	15097	99.3	2024	2126	95.20	108	121	89.26
Sub20	12663	12623	99.7	1932	1907	98.69	83	82	98.78
Sub21	30222	30105	99.6	2654	2317	85.46	113	100	87.00
Sub22	11548	11524	99.8	1616	1467	89.84	62	60	96.67
Sub23	19403	19329	99.6	1974	1748	87.07	94	81	83.95
Sub24	23578	23405	99.3	2033	2020	99.36	103	100	97.00
Sub25	8447	8404	99.5	839	895	93.74	45	50	90.00
Sub26	12682	12575	99.2	1713	1786	95.91	66	69	95.65
Sub27	12071	11978	99.2	1316	1385	95.02	59	58	98.28
Sub28	9670	9563	98.9	883	949	93.05	48	63	76.19
Average	99.4	1472.3	1430.6	92.9	68.0	67.4	92.3	99.4	1472.3
Std	5024.9	5008.9	0.3	509.8	479.9	91.6	23.5	23.0	82.3