Natural Image Enhancement Using a Biogeography Based Optimization Enhanced with Blended Migration Operator

Table 3

Discrete entropy 𝐻 compared with traditional IE techniques.

Image	WTHE	Fuzzy	GA	DE	PSO	BBO-BMO
Image 1	7.315	7.215	7.352	7.52	7.492	6.629
Image 2	7.808	7.774	7.798	7.478	7.497	7.774
Image 3	7.565	7.678	7.565	7.555	7.549	7.603
Image 4	7.438	7.558	7.543	7.552	7.604	6.881