Table 3.
Descriptions of two databases used in our research.
| SDU-DB | PolyU-DB | |||
|---|---|---|---|---|
| Original images | # of images | 3816 | 1872 | |
| # of people | 106 | 156 | ||
| # of hands | 2 | 1 | ||
| # of fingers | 3 (index, middle, and ring fingers) |
2 (index and middle fingers) |
||
| # of classes (# of images per class) |
636 (6) |
312 (6) |
||
| Data augmentation for training | Finger shape image | # of images | 230,868 (318 classes × 6 images × 121 times) |
113,256 (156 classes × 6 images × 121 times) |
| Finger-vein image | # of images | 48,972 | 24,024 | |
| # of images for genuine matching |
24,486 (6 images × (13 times − 1) × 318 classes) |
12,012 (6 images × (13 times − 1) × 156 classes) |
||
| # of images for imposter matching (Random selection) |
24,486 | 12,012 | ||