Research Article
Color Enhancement in Endoscopic Images Using Adaptive Sigmoid Function and Space Variant Color Reproduction
Table 13
Comparisons of CEF indices with other enhancement works.
| | Image number | AHE [11] | CLAHE [12] | HBF [13] | BPDFHE [14] | Proposed |
| | 1 | 0.9620 | 1.1197 | 1.0355 | 1.0149 | 1.7329 | | 2 | 0.9623 | 1.0989 | 1.0077 | 1.0037 | 1.8897 | | 3 | 0.9446 | 1.1716 | 1.0751 | 1.0547 | 1.8812 | | 4 | 0.9946 | 1.2009 | 1.1913 | 1.1003 | 1.7443 |
| | Average of 60 endoscopic images | 0.9661 | 1.1574 | 1.0614 | 1.0411 | 1.7477 |
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