Table 13: Comparisons of CEF indices with other enhancement works.

Image numberAHE [11]CLAHE [12]HBF [13]BPDFHE [14]Proposed

10.96201.11971.03551.01491.7329
20.96231.09891.00771.00371.8897
30.94461.17161.07511.05471.8812
40.99461.20091.19131.10031.7443

Average of 60 endoscopic images0.96611.15741.06141.04111.7477