A Novel Directionlet-Based Image Denoising Method Using MMSE Estimator and Laplacian Mixture Distribution

Table 2

PSNR comparison (Gaussian noise) of the proposed method with other methods (in dB).

	5	10	20	30	50	75	100
Boat
Noisy	34.1172	28.1398	22.1890	18.7310	14.6045	11.7486	10.1119
SureShrink	32.8096	30.6670	27.8854	26.0042	23.1738	20.6964	19.3363
BayesShrink	35.7005	32.5481	29.1581	27.2197	24.9616	22.9441	21.4948
BLS-GSM	36.7329	33.4831	30.2994	28.4360	26.1782	24.5648	23.5208
K-SVD	37.2160	33.5918	30.3368	28.4117	25.8962	24.0504	22.7441
Proposed	37.6733	34.0517	30.7789	29.3584	26.6035	24.8389	23.6182
Peppers
Noisy	34.1349	28.1728	22.2225	18.7757	14.7374	11.8613	10.2132
SureShrink	33.4827	31.7831	29.1256	26.9193	24.2321	21.1825	19.6603
BayesShrink	36.1450	33.3432	30.1000	28.1650	25.9694	23.2449	21.7568
BLS-GSM	37.1139	33.9436	30.7529	28.6675	26.0842	24.2591	22.5839
K-SVD	37.7215	34.2628	30.8189	29.0493	26.1453	23.6957	21.8496
Proposed	37.1641	34.2156	31.5728	29.8722	27.4658	25.5356	24.1813
Couple
Noisy	34.1468	28.1501	22.1580	18.7253	14.5570	11.7173	10.1078
SureShrink	32.5729	28.9800	26.6306	24.9866	22.3759	20.2493	19.3832
BayesShrink	36.2527	32.2714	28.6094	26.8294	24.6925	22.8233	21.5051
BLS-GSM	36.9564	32.4654	29.3840	27.2101	24.7357	23.0515	21.5715
K-SVD	37.2685	33.4258	29.6725	27.5475	25.1199	23.4921	22.4298
Proposed	37.0631	33.0186	29.9705	27.7835	25.5059	23.9003	22.8189
Cameraman
Noisy	31.4893	27.0812	21.9267	18.8280	14.9846	12.2984	10.6453
SureShrink	33.6523	31.0300	27.9941	25.8978	22.8099	19.8985	18.7697
BayesShrink	38.2318	34.1862	30.4611	28.1938	25.0584	22.5210	20.4949
BLS-GSM	40.3564	36.5456	32.9820	29.8171	27.6347	25.0651	22.7713
K-SVD	40.9217	37.1257	33.2066	30.9474	28.4564	25.9567	24.0799
Proposed	40.8315	37.2493	33.4672	31.2645	28.8026	26.7494	25.2453
Lena
Noisy	30.0189	26.2837	21.3969	18.3500	14.5940	11.9378	10.3692
SureShrink	31.6837	29.7113	27.5191	25.9838	23.6352	21.2366	20.1037
BayesShrink	36.8307	33.4175	30.2196	28.5905	26.2983	24.0695	22.3581
BLS-GSM	38.4729	35.6441	32.5985	29.7101	28.1149	26.5862	25.6407
K-SVD	38.5806	35.4874	32.3522	30.4133	27.7653	25.7731	24.4709
Proposed	38.7493	35.8493	33.1672	31.2645	28.2026	26.4494	25.0453