Fig. 3
Visual comparisons of denoising results on Boat image corrupted by additive white Gaussian noise with standard deviation 50: a TV-based regularization [28] (PSNR = 22.95 dB; SSIM = 0.456); b NLM [38] (PSNR = 24.63 dB; SSIM = 0.589); c R-NL [56] (PSNR = 25.42 dB; SSIM = 0.647); d NCSR model [66] (PSNR = 26.48 dB; SSIM = 0.689); e LRA_SVD [78] (PSNR = 26.65 dB; SSIM = 0.684); f WNNM [58] (PSNR = 26.97 dB; SSIM = 0.708)