Table 2 Statistics of the six databases
From: Double regularized matrix factorization for image classification and clustering
Database | No. of images | No. of features | No. of classes |
|---|---|---|---|
Extended YaleB | 2432 | 32 × 32 | 38 |
CMU PIE | 1632 | 32 × 32 | 24 |
AR | 1400 | 32 × 32 | 14 |
JAFFE | 213 | 32 × 32 | 10 |
ORL | 400 | 32 × 32 | 40 |
COIL20 | 1440 | 32 × 32 | 20 |