Research Article
Bidirectional Nonnegative Deep Model and Its Optimization in Learning
Table 1
The characteristics of the datasets.
| Datasets | Dimension () | Total number () | Number of classes |
| COIL20 | 1024 | 1440 | 20 | COIL100 | 1024 | 7200 | 100 | CMU PIE | 1024 | 2856 | 68 |
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