| Images | Light intensity | Threshold | SIFT CPs | RI-SIFT CPs |
| 1 | Low | 75 | 775 | 342 |
| 2 | Moderate | 50 | 1125 | 424 |
| 3 | Higher | 50 | 883 | 547 |
| Noon | Highest (Noon) | Noon | Noon | Noon |
| 4 | Less than Noon | 50 | 804 | 706 |
| 5 | Moderate | 75 | 883 | 547 |
| 6 | Lowest | 100 | 681 | 469 |