Mathematical Problems in Engineering / 2014 / Article / Fig 5

Research Article

TV+TV2 Regularization with Nonconvex Sparseness-Inducing Penalty for Image Restoration

Figure 5

Comparison of Shepp-Logan phantom image reconstruction from 9.36% DCT data. First column from up to down: original image, back projection image (PSNR = 56.9194, MSE = 0.1322, and SSIM = 0.2790), results of the TV method (PSNR = 65.1352, MSE = 0.0274, and SSIM = 0.9768), results of the TV+TV2 method (PSNR = 65.3658, MSE = 0.0189, and SSIM = 0.9820), and results of our proposed method (PSNR = 66.6062, MSE = 0.0142, and SSIM = 0.9896). Second column: close-up image in the red box. Third column: 3D close-up intensity profile in the red box. Fourth column: SSIM map.

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