A Spiking Neural Network Based Cortex-Like Mechanism and Application to Facial Expression Recognition

Table 2

Recognition accuracy of illumination variant facial expression dataset results (with and without normalization).

Name			CUN facial	Expression subset
		Un-normalized			Normalized
		Illumination Angle			Illumination Angle		Ave
Degree	0^∘	45^∘	90^∘	0^∘	45^∘	90^∘
Pose	H/Sa/Su/D/F/A	H/Sa/Su/D/F/A	H/Sa/Su/D/F/A	H/Sa/Su/D/F/A	H/Sa/Su/D/F/A	H/Sa/Su/D/F/A	(%)
0^∘	85/76/79/67/65/82	57/53/55/55/48/63	66/57/58/62/51/59	85/76/79/67/65/82	66/52/65/59/47/66	67/55/61/56/47/62	63/64
30^∘	67/65/61/53/42/57	53/51/50/51/43/55	51/55/58/55/50/48	66/59/60/72/48/62	60/65/59/52/45/56	46/45/40/45/32/42	53/53
45^∘	63/56/52/55/35/51	45/55/47/45/43/50	44/42/42/45/43/40	66/43/50/51/52/55	58/53/57/51/42/55	48/44/39/40/38/43	47/49
60^∘	48/46/44/47/38/45	42/45/45/45/32/41	36/36/33/35/35/39	57/52/45/49/59/61	50/45/44/49/40/51	41/40/36/35/22/32	40/45
90^∘	33/33/33/33/17/33	33/37/31/35/25/33	37/30/31/25/18/32	38/39/37/33/40/42	36/33/40/33/38/33	35/37/35/35/31/33	31/36
Average; (%)	59/55/54/51/40/54	46/48/46/46/38/48	47/44/45/44/39/44	62/54/54/54/53/60	54/50/53/49/42/52	47/44/42/42/34/42	47/49
Notes	H-Happiness	Sa-Sadness	Su-Surprise	D-Disgust	F-Fear	A-Anger