Sparsity for Image Denoising with Local and Global Priors

Table 1

PSNR/SSIM of denoising images using different models with 3 noise levels.

	NLM		NL-TV		NLMPCA		NLMSAP		R-NL		-NLM
	PSNR	SSIM	PSNR	SSIM	PSNR	SSIM	PSNR	SSIM	PSNR	SSIM	PSNR	SSIM
Lena	31.53	0.89	31.35	0.91	31.52	0.90	31.90	0.92	32.04	0.91	32.08	0.92
Boat	29.30	0.85	29.67	0.90	29.45	0.76	29.60	0.88	29.92	0.88	29.95	0.90
Barbara	30.09	0.92	28.77	0.91	28.59	0.82	30.37	0.93	29.76	0.93	30.16	0.93
Man	28.48	0.87	29.53	0.89	29.21	0.86	29.57	0.87	29.26	0.89	29.64	0.90
Cameraman	29.00	0.77	29.60	0.85	29.42	0.72	29.69	0.84	30.19	0.82	30.28	0.82
House	32.23	0.73	32.20	0.84	31.55	0.81	32.48	0.85	32.69	0.79	32.88	0.86
Peppers	29.69	0.80	30.16	0.85	29.70	0.77	30.77	0.87	30.78	0.84	30.87	0.87
Couple	29.14	0.90	29.29	0.90	29.46	0.79	29.31	0.88	—	—	29.63	0.91
Hill	29.50	0.88	29.66	0.88	29.68	0.83	29.40	0.85	—	—	29.78	0.88
Fingerprint	26.81	0.97	26.86	0.95	27.30	0.83	27.43	0.95	—	—	27.56	0.95
Mandrill	25.63	0.89	25.62	0.87	26.07	0.77	25.94	0.86	—	—	26.17	0.89
Monarch	29.20	0.86	29.30	0.89	28.63	0.83	29.58	0.90	—	—	29.70	0.90
Average	29.22	0.86	29.34	0.88	29.22	0.81	29.67	0.88	—	—	29.89	0.89
Lena	29.52	0.84	29.38	0.86	29.48	0.84	29.76	0.88	30.10	0.86	30.31	0.89
Boat	27.39	0.78	27.70	0.84	27.80	0.70	27.53	0.81	27.98	0.82	28.11	0.85
Barbara	27.80	0.87	26.52	0.86	26.60	0.77	27.90	0.88	27.50	0.88	27.93	0.89
Man	26.69	0.80	27.80	0.84	27.26	0.82	27.60	0.81	27.36	0.83	28.20	0.85
Cameraman	27.35	0.70	27.36	0.78	27.51	0.66	27.70	0.79	28.12	0.75	28.25	0.79
House	29.64	0.73	29.92	0.79	29.45	0.74	29.99	0.80	30.70	0.75	30.74	0.82
Peppers	27.90	0.74	27.90	0.79	27.84	0.71	28.44	0.82	28.53	0.78	28.60	0.82
Couple	26.62	0.80	27.24	0.84	26.85	0.74	26.92	0.80	—	—	27.44	0.84
Hill	27.50	0.79	27.92	0.82	27.80	0.78	27.53	0.78	—	—	27.96	0.82
Fingerprint	24.73	0.88	24.88	0.91	25.10	0.76	24.95	0.89	—	—	25.42	0.92
Mandrill	23.65	0.76	23.78	0.81	23.87	0.75	23.72	0.75	—	—	23.99	0.81
Monarch	27.07	0.77	27.12	0.83	26.48	0.75	27.21	0.85	—	—	27.56	0.84
Average	27.16	0.79	27.29	0.83	27.17	0.75	27.44	0.82	—	—	27.88	0.85
Lena	28.10	0.80	27.93	0.82	27.90	0.80	28.21	0.84	28.77	0.83	28.79	0.85
Boat	26.03	0.72	26.37	0.79	26.19	0.69	26.03	0.76	26.61	0.76	26.78	0.81
Barbara	26.07	0.82	25.36	0.81	24.65	0.69	26.03	0.83	25.72	0.83	26.35	0.85
Man	25.38	0.73	26.56	0.79	26.26	0.76	26.29	0.76	26.04	0.78	26.85	0.80
Cameraman	26.00	0.63	26.05	0.73	26.03	0.59	26.13	0.79	26.70	0.72	26.83	0.79
House	27.93	0.68	28.28	0.74	27.87	0.69	27.89	0.76	29.05	0.71	29.18	0.72
Peppers	26.33	0.68	26.32	0.73	26.39	0.63	26.62	0.78	26.85	0.75	26.99	0.74
Couple	25.46	0.90	29.29	0.90	29.46	0.79	29.31	0.88	—	—	29.63	0.91
Hill	26.28	0.76	26.73	0.77	26.88	0.72	26.36	0.73	—	—	26.98	0.78
Fingerprint	23.46	0.89	23.51	0.88	23.54	0.69	23.04	0.82	—	—	23.75	0.88
Mandrill	22.37	0.75	22.56	0.74	22.66	0.68	22.24	0.66	—	—	22.74	0.74
Monarch	25.21	0.68	25.41	0.77	24.95	0.68	25.48	0.80	—	—	25.99	0.77
Average	25.72	0.74	25.90	0.78	25.77	0.69	25.81	0.77	—	—	26.43	0.80