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Table 5 Performance of proposed approach (CK+ 7 expressions)

From: Facial expression recognition and histograms of oriented gradients: a comprehensive study

	Ne	An	Di	Fe	Ha	Sa	Su
Ne	89.6	1.8	0	0	0	8.6	0
An	4.4	86.8	4.4	0	0	4.4	0
Di	0	5.4	92.9	1.7	0	0	0
Fe	0	0	0	93.9	4.1	0	2.0
Ha	0	0	0	0	100	0	0
Sa	0	0	1.8	0	0	98.2	0
Su	1.3	0	0	1.3	0	0	97.4

Average performances: recall = 94.1 %, precision = 94.3 %, accuracy = 98.5 %, F-score = 94.1 %. (orientation bins = 7, cell size = 7)
Ne Neutral, An Anger, Di Disgusted, Fe Fearful, Ha Happy, Sa Sad, Su Surprised

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