Color Enhancement in Endoscopic Images Using Adaptive Sigmoid Function and Space Variant Color Reproduction

Table 14

Comparisons of CEF indices with other color reproduction works.

Image number	[23, 24]	[21]	[22]	Proposed
1	1.1059	0.5987	0.5118	1.7784
2	1.0991	0.7481	0.5997	1.6599
3	1.1007	0.6187	0.6001	1.8413
4	1.1972	0.5249	0.4991	1.7749
Average of 60 endoscopic images	1.1391	0.5149	0.4977	1.5621