Impulse Noise Removal by L1 Weighted Nuclear Norm Minimization

Jian Lu, Yuting Ye, Yiqiu Dong, Xiaoxia Liu, Yuru Zou

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Abstract

In recent years, the nuclear norm minimization (NNM) as a convex relaxation of the rank minimization has attracted great research interest. By assigning different weights to singular values, the weighted nuclear norm minimization (WNNM) has been utilized in many applications. However, most of the work on WNNM is combined with the l2data-fidelity term, which is under additive Gaussian noise assumption. In this paper, we introduce the L1-WNNM model, which incorporates the l1-data-fidelity term and the regularization from WNNM. We apply the alternating direction method of multipliers (ADMM) to solve the non-convex minimization problem in this model. We exploit the low rank prior on the patch matrices extracted based on the image non-local self-similarity and apply the L1-WNNM model on patch matrices to restore the image corrupted by impulse noise. Numerical results show that our method can effectively remove impulse noise.
Original languageEnglish
JournalJournal of Computational Mathematics
Volume41
Pages (from-to)1171-1191
ISSN1991-7139
DOIs
Publication statusPublished - 2023

Keywords

  • Image denoising
  • Weighted nuclear norm minimization
  • l 1 -data-fidelity term
  • Low rank analysis
  • Impulse noise

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