A Constrained Algorithm Based NMF_α for Image Representation

Table 1

The comparison of classification accuracy rates on the ORL Database.

	Classification accuracy Ac() (%)
	CNMF
2	93.90	92.95	93.51 ± 0.09	92.14 ± 0.18	93.89 ± 0.91
3	86.20	84.33	85.71 ± 0.83	82.26 ± 1.23	86.21 ± 2.07
4	84.55	84.05	84.74 ± 0.56	83.02 ± 0.47	84.78 ± 0.36
5	80.16	78.38	80.10 ± 0.22	80.15 ± 0.18	80.16 ± 0.29
6	76.72	76.73	77.13 ± 0.28	77.60 ± 0.19	78.09 ± 0.40
7	81.14	79.04	80.34 ± 0.81	78.07 ± 0.88	82.15 ± 1.95
8	78.08	77.02	78.66 ± 0.69	78.77 ± 0.94	79.45 ± 1.33
9	83.19	82.23	83.57 ± 0.36	81.22 ± 0.21	85.19 ± 1.21
10	77.03	76.88	77.69 ± 0.12	77.75 ± 0.19	78.96 ± 0.73
Avg.	82.33	81.29	82.38	81.22	83.21