Local Contrast Enhancement Utilizing Bidirectional Switching Equalization of Separated and Clipped Subhistograms

Table 2

SNS values obtained from nine input images.

	Original	GHE [1]	BOHE [12]	CLAHE [15]	LCE-BSESCS
Image 1	3.4545	7.7319	13.2477	9.5568	6.3514
Image 2	2.2514	7.2053	20.6303	18.9394	8.0975
Image 3	5.0863	10.4602	18.2116	12.6374	7.8931
Image 4	3.9052	15.9535	23.8075	14.9450	6.5358
Image 5	5.2880	7.0348	19.8410	13.8103	7.4881
Image 6	7.8513	13.6009	22.8940	14.1334	9.1318
Image 7	1.3906	20.8070	30.4298	20.1688	5.2793
Image 8	0.5047	20.4854	44.9306	32.5611	3.5101
Image 9	1.0342	12.8723	21.9976	17.5813	3.8881
Average	3.4185	12.9057	23.9989	17.1482	6.4639