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