| Information entropy | Average gradient | Edge strength | Variance | Color reducibility |
Original image | 13.3175 | 3.0172 | 20.9402 | 492.6031 | - |
Histogram Equation | 13.535 | 4.7693 | 21.6575 | 495.7654 | 0.4764 |
SSR | 14.2545 | 10.3790 | 73.4939 | 1489.5 | 0.6366 |
Improved algorithm | 15.2136 | 13.7727 | 97.7731 | 1981.7 | 0.6589 |
Proposed | 16.7572 | 13.5337 | 92.8732 | 2054.4 | 0.6976 |