A Constrained Algorithm Based NMF_α for Image Representation

Table 3

The comparison of classification accuracy rates on the Yale Database.

	Ac() (%)
	CNMF
2	81.64	85.23	85.93 ± 0.65	84.18 ± 0.81	86.27 ± 2.46
3	68.48	76.91	77.14 ± 0.86	77.26 ± 0.42	79.01 ± 1.09
4	64.25	66.70	68.11 ± 0.67	66.12 ± 0.16	69.33 ± 2.23
5	65.82	67.71	69.14 ± 1.21	66.54 ± 1.01	70.57 ± 2.22
6	60.12	64.26	65.62 ± 0.94	63.70 ± 0.94	66.92 ± 1.41
7	59.25	62.47	63.97 ± 0.72	59.83 ± 0.38	65.23 ± 1.77
8	54.40	59.26	60.12 ± 0.31	56.76 ± 0.07	60.89 ± 1.28
9	54.85	57.30	58.08 ± 0.12	54.88 ± 0.14	58.98 ± 0.62
10	52.68	56.20	57.56 ± 0.03	53.83 ± 0.01	57.56 ± 0.73
Avg.	62.39	65.89	67.30	64.79	68.31