Table 4.

Performance of proposed approach (CK+ 6 expressions)

	An	Di	Fe	Ha	Sa	Su
An	88.6	4.5	2.4	0	4.5	0
Di	5.6	89.0	1.8	1.8	0	1.8
Fe	0	0	100	0	0	0
Ha	0	0	0	100	0	0
Sa	0	0	0	0	100	0
Su	1.3	0	1.3	0	0	97.4

Average performances: recall = 95.9 %, precision = 95.8 %, accuracy = 98.8 %, F-score = 95.8 %. (orientation bins = 7, cell size = 7)

An Anger, Di Disgusted, Fe Fearful, Ha Happy, Sa Sad, Su Surprised