Research Article
A Constrained Algorithm Based NMFα for Image Representation
Table 4
The comparison of normalized mutual information on the Yale Database.
| | Normalized mutual information (%) | CNMF | | | | |
| 2 | 48.99 | 59.66 | 59.73 ± 0.39 | 58.17 ± 0.17 | 61.11 ± 1.82 | 3 | 42.90 | 53.52 | 53.58 ± 0.73 | 52.75 ± 0.93 | 54.49 ± 1.74 | 4 | 47.80 | 53.60 | 53.66 ± 0.18 | 52.99 ± 0.65 | 54.58 ± 1.64 | 5 | 53.99 | 57.49 | 57.56 ± 0.07 | 56.21 ± 0.06 | 58.58 ± 2.32 | 6 | 50.63 | 55.88 | 56.15 ± 0.07 | 55.40 ± 0.08 | 57.62 ± 1.09 | 7 | 53.03 | 57.60 | 57.88 ± 0.22 | 57.27 ± 0.16 | 59.05 ± 1.89 | 8 | 50.83 | 56.52 | 56.93 ± 0.13 | 56.20 ± 0.13 | 58.98 ± 1.46 | 9 | 53.08 | 55.30 | 55.98 ± 0.73 | 54.81 ± 0.81 | 56.15 ± 1.20 | 10 | 52.84 | 56.73 | 57.43 ± 0.16 | 56.41 ± 0.41 | 58.30 ± 1.11 |
| Avg. | 50.45 | 56.26 | 56.54 | 55.58 | 57.65 |
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