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Image compressed sensing based on non-convex low-rank approximation

Published: 01 May 2018 Publication History

Abstract

Nonlocal sparsity and structured sparsity have been evidenced to improve the reconstruction of image details in various compressed sensing (CS) studies. The nonlocal processing is achieved by grouping similar patches of the image into the groups. To exploit these nonlocal self-similarities in natural images, a non-convex low-rank approximation is proposed to regularize the CS recovery in this paper. The nuclear norm minimization, as a convex relaxation of rank function minimization, ignores the prior knowledge of the matrix singular values. This greatly restricts its capability and flexibility in dealing with many practical problems. In order to make a better approximation of the rank function, the non-convex low-rank regularization namely weighted Schatten p-norm minimization (WSNM) is proposed. In this way, both the local sparsity and nonlocal sparsity are integrated into a recovery framework. The experimental results show that our method outperforms the state-of-the-art CS recovery algorithms not only in PSNR index, but also in local structure preservation.

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  • (2022)Truncated γ norm-based low-rank and sparse decompositionMultimedia Tools and Applications10.1007/s11042-022-12509-881:27(38279-38295)Online publication date: 1-Nov-2022

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Published In

cover image Multimedia Tools and Applications
Multimedia Tools and Applications  Volume 77, Issue 10
May 2018
1427 pages

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Kluwer Academic Publishers

United States

Publication History

Published: 01 May 2018

Author Tags

  1. Image compressed sensing
  2. Low-rank approximation
  3. Non-convex optimization
  4. Weighted Schatten p-norm

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  • (2022)Truncated γ norm-based low-rank and sparse decompositionMultimedia Tools and Applications10.1007/s11042-022-12509-881:27(38279-38295)Online publication date: 1-Nov-2022

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