. Author manuscript; available in PMC: 2014 Aug 26.

Published in final edited form as: IEEE Trans Image Process. 2008 Nov;17(11):2089–2101. doi: 10.1109/tip.2008.2004796

TABLE I.

Denoising Performance for Six Images With Four Different Noise Levels. Results are Shown for Algorithms Using Two Oriented SP Bands (top Half) Eight Oriented SP Bands(Bottom Half). Values Given are Averaged Over Five Trials. In Each Cell, Number on Left is for the OAGSM/NC Algorithm, Number on Right is for the GSM Algorithm. All Values Indicate PSNR, Computed as 20 log₁₀(255/σ_e), Where $σ_{e}^{2}$ is the Error Variance

σ (PSNR)	Lena	Barbara	Boats	House	Peppers
10 (28.13)	35.52 / 35.21	34.00 / 33.39	33.48 / 33.34	35.27 / 34.94	33.70 / 33.29
20 (22.11)	32.57/32.15	30.29 / 29.54	30.24 / 30.08	32.29/31.89	30.26 / 29.79
25 (20.17)	31.58/31.16	29.07 / 28.36	29.21 / 29.06	31.28/30.89	29.16 / 28.71
50 (14.15)	28.46 / 28.07	25.29 / 24.93	26.17 / 26.05	28.17 / 27.82	25.76 / 25.46
75 (10.63)	26.67 / 26.37	23.48 / 23.27	24.56 / 24.49	26.34 / 26.02	23.81 / 23.60
10 (28.13)	35.67 / 35.51	34.26 / 33.96	33.56 / 33.49	35.43 / 35.27	33.78 / 33.54
20 (22.11)	32.78 / 32.55	30.68 / 30.27	30.37 / 30.29	32.48 / 32.25	30.39 / 30.06
25 (20.17)	31.81 / 31.58	29.51 / 29.11	29.36 / 29.29	31.50/31.25	29.30 / 28.97
50 (14.15)	28.70 / 28.48	25.92 / 25.67	26.34 / 26.29	28.33 / 28.10	25.95 / 25.71
75 (10.63)	26.90 / 26.72	23.92 / 23.81	24.74 / 24.71	26.52 / 26.29	24.03 / 23.88