| Species - Surface | Class name | Class index | Number of images |
|---|---|---|---|
| Cedar - Transverse | Cedar-C | 0 | 3095 |
| Cedar - Longitudinal | Cedar-L | 1 | 2250 |
| Cypress - Transverse | Cypress-C | 2 | 3420 |
| Cypress - Longitudinal | Cypress-L | 3 | 3090 |
| Korean Pine - Transverse | KoreanPine-C | 4 | 3960 |
| Korean Pine - Longitudinal | KoreanPine-L | 5 | 3952 |
| Korean Red Pine - Transverse | KoreanRedPine-C | 6 | 3060 |
| Korean Red Pine - Longitudinal | KoreanRedPine-L | 7 | 3714 |
| Larch - Transverse | Larch-C | 8 | 3330 |
| Larch - Longitudinal | Larch-L | 9 | 3944 |