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Table 1 The SNR, MSSIM of the restored "Lena" images by using four models. The numbers in the bracket under the "MSSIM" column refer to the total iteration number of the algorithm.

From: Image Variational Denoising Using Gradient Fidelity on Curvelet Shrinkage

Noise standard Noisy image Curvelet shrinkage method "TV" Model "TVGF" Model Proposed model
deviation SNR (dB) MSSIM SNR (dB) MSSIM SNR (dB) MSSIM SNR (dB) MSSIM SNR (dB) MSSIM
20 7.59 0.34 16.62 0.86 16.76 0.85 (1923) 15.68 0.82 (969) 17.26 0.88 (486)
25 5.63 0.27 15.70 0.84 15.68 0.82 (2290) 14.75 0.77 (1115) 16.36 0.86 (615)
30 4.04 0.22 14.95 0.82 14.81 0.80 (2991) 13.79 0.71 (1135) 15.58 0.85 (763)
35 2.70 0.18 14.29 0.81 13.92 0.76 (3000) 12.88 0.67 (1142) 14.92 0.84 (898)
40 1.54 0.15 13.72 0.79 12.94 0.71 (3000) 12.01 0.61 (1151) 14.36 0.82 (1033)