Adaptive Image Enhancement Using Entropy-Based Subhistogram Equalization

Table 2

PSNR calculated for the test images.

Image	BBHE	DSIHE	RMSHE	MMBEBHE	RSIHE	DHE	BHEPL	ESIHE	MMSICHE	BHEMHB	Proposed
F16	18.3412	20.9870	21.8760	24.4849	22.1130	20.7826	21.6876	22.8690	23.6437	23.9420	27.5627
Aerial	18.3726	19.7078	19.3277	24.0514	24.4368	24.1023	23.8672	23.6780	25.2106	24.4635	26.1423
Butterfly	23.7126	23.2012	24.9133	23.5086	27.2658	26.7627	26.3412	27.9320	28.0131	28.2672	29.3826
Fish	21.3122	20.1459	19.7673	22.0862	24.9780	27.1671	23.2674	25.4060	26.0126	26.4010	28.6235
Lena	23.1417	23.5663	22.1785	22.7730	24.8000	27.9726	23.2672	25.7990	27.1211	26.5950	30.2516
Portofino	19.1426	21.7635	22.6540	25.3268	21.3264	25.1324	20.2673	22.2420	24.3746	24.5865	26.3410