| Discriminator | Threshold value |
| Mean homogeneity | T > 0.7 |
| Grey level image to binary image | T < 0.4 |
| CVR | T < 0.17 |
| NDVI | 0 < T < 0.3 |
| Histogram | T < 0.7 |
| Mean blue | 15 < T < 150 |
| NRI | T < 0.5 |