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Sparsity reconstruction using nonconvex TGpV-shearlet regularization and constrained projection

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  • Wu, Tingting
  • Ng, Michael K.
  • Zhao, Xi-Le

Abstract

In many sparsity-based image processing problems, compared with the convex ℓ1 norm approximation of the nonconvex ℓ0 quasi-norm, one can often preserve the structures better by taking full advantage of the nonconvex ℓp quasi-norm (0≤p<1). In this paper, we propose a nonconvex ℓp quasi-norm approximation in the total generalized variation (TGV)-shearlet regularization for image reconstruction. By introducing some auxiliary variables, the nonconvex nonsmooth objective function can be solved by an efficient alternating direction method of multipliers with convergence analysis. Especially, we use a generalized iterated shrinkage operator to deal with the ℓp quasi-norm subproblem, which is easy to implement. Extensive experimental results show clearly that the proposed nonconvex sparsity approximation outperforms some state-of-the-art algorithms in both the visual and quantitative measures for different sampling ratios and noise levels.

Suggested Citation

  • Wu, Tingting & Ng, Michael K. & Zhao, Xi-Le, 2021. "Sparsity reconstruction using nonconvex TGpV-shearlet regularization and constrained projection," Applied Mathematics and Computation, Elsevier, vol. 410(C).
  • Handle: RePEc:eee:apmaco:v:410:y:2021:i:c:s0096300321002605
    DOI: 10.1016/j.amc.2021.126170
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    References listed on IDEAS

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    1. Yang, Jing-Hua & Zhao, Xi-Le & Ji, Teng-Yu & Ma, Tian-Hui & Huang, Ting-Zhu, 2020. "Low-rank tensor train for tensor robust principal component analysis," Applied Mathematics and Computation, Elsevier, vol. 367(C).
    2. Zhongming Wu & Min Li & David Z. W. Wang & Deren Han, 2017. "A Symmetric Alternating Direction Method of Multipliers for Separable Nonconvex Minimization Problems," Asia-Pacific Journal of Operational Research (APJOR), World Scientific Publishing Co. Pte. Ltd., vol. 34(06), pages 1-27, December.
    3. Shama, Mu-Ga & Huang, Ting-Zhu & Liu, Jun & Wang, Si, 2016. "A convex total generalized variation regularized model for multiplicative noise and blur removal," Applied Mathematics and Computation, Elsevier, vol. 276(C), pages 109-121.
    4. Hanming Zhang & Linyuan Wang & Bin Yan & Lei Li & Ailong Cai & Guoen Hu, 2016. "Constrained Total Generalized p-Variation Minimization for Few-View X-Ray Computed Tomography Image Reconstruction," PLOS ONE, Public Library of Science, vol. 11(2), pages 1-28, February.
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    Cited by:

    1. Wu, Tingting & Huang, Chaoyan & Jia, Shilong & Li, Wei & Chan, Raymond & Zeng, Tieyong & Kevin Zhou, S., 2024. "Medical image reconstruction with multi-level deep learning denoiser and tight frame regularization," Applied Mathematics and Computation, Elsevier, vol. 477(C).

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