An adaptive switching filter based on approximated variance for detection of impulse noise from color images

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Table 2 Various measuring criteria and their values at different values of α and η at different noise ratio, for the proposed filter for RVN

Values of α and η	RVN				RVN				RVN				RVN
	.10				.20				.80				.90
	NCD	PSNR	MAE	TIME	NCD	PSNR	MAE	TIME	NCD	PSNR	MAE	TIME	NCD	PSNR	MAE	TIME
Lower values of α
0.5, 0.5	0.0017	36.928	0.666	3.90	0.003	35.152	1.134	4.504	0.015	27.618	5.32	8.72	0.0219	25.981	6.84	9.52
0.4, 0.6	0.0016	37.063	0.655	3.95	0.003	35.161	1.147	4.560	0.018	27.239	5.67	9.07	0.0227	25.611	7.39	9.92
0.3, 0.7	0.0017	37.056	0.667	4.02	0.003	34.972	1.171	4.711	0.019	25.967	7.03	9.08	0.0253	24.105	9.48	9.90
Higher values of α
0.6, 0.4	0.0017	37.023	0.658	4.17	0.002	35.102	1.135	4.616	0.016	27.748	5.28	9.06	0.0212	26.237	6.65	9.85
0.7, 0.3	0.0018	37.017	0.660	4.04	0.003	35.042	1.143	4.623	0.017	27.707	5.23	9.06	0.0204	26.134	6.68	9.92
0.8, 0.2	0.0019	36.899	0.668	3.99	0.005	35.092	1.144	4.640	0.017	27.662	5.25	9.10	0.0215	25.980	6.73	9.92