A New Fast Algorithm for Constrained Four-Directional Total Variation Image Denoising Problem

Figure 2

Comparison of the different methods on the “Cameraman” image. (a) Original image; (b) noisy image, PSNR = 19.60 dB; (c) denoised image with GP, PSNR = 26.19 dB; (d) denoised image with FGP, PSNR = 26.19 dB; (e) denoised image with TGV, PSNR = 26.38 dB; (f) denoised image with NLTV, PSNR = 27.13 dB; (g) denoised image with 4-GP, PSNR = 27.41 dB; and (h) denoised image with 4-FGP, PSNR = 27.41 dB.

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