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Table 3 A variety of image denoising algorithms are compared for Lena image

From: A parameter-adaptive iterative regularization model for image denoising

Gauss white noise σ 10 15 20 25 30
Wavelet + wiener 30.65 28.06 26.94 25.48 24.39
Hard threshold of curvelet 31.67 29.58 28.47 26.43 24.97
Soft threshold of curvelet 31.99 30.76 29.78 28.79 26.34
Block threshold of curvelet 32.76 32.33 31.09 29.57 28.08
Our method 33.97 33.68 32.59 30.14 29.64