Two Efficient Algorithms for Orthogonal Nonnegative Matrix Factorization

Table 3

Comparison of ORE testing on image cat.

Rank J	Algorithm 1	Algorithm 2	Algorithm 3	Algorithm 4
5	1.1121 ± 0.3217		0.9992 ± 0.0001	0.9091 ± 0.3015
10	2.7271 ± 0.2473		0.9994 ± 0.0002	0.9524 ± 0.2182
15	4.3523 ± 0.1820		0.9996 ± 0.0001	0.9677 ± 0.1796
20	5.8419 ± 0.1556		0.9996 ± 0.0003	0.9756 ± 0.1562
25	7.8002 ± 0.1482		0.9997 ± 0.0002	0.9804 ± 0.1400
30	9.4566 ± 0.1331		0.9998 ± 0.0002	0.9836 ± 0.1280