Abstract
In this paper, we consider ℓ2,p(0 < p < 1) regularized total variation with overlapping group sparsity prior for image restoration with impulse noise. The proposed prior inherits the advantages of a total variation regularizer to preserve edges and reduce the staircase effect, meanwhile promoting group-level sparseness. Since the new model is nonsmooth and nonconvex, we utilize the proximal alternate minimization method to solve it by drawing support from the half-quadratic scheme to deal with the constituted ℓ2-ℓ2,p subproblems. In addition, we also provide the convergence analysis for the used numerical methods. Experimental results demonstrate that the new approach outperforms representative gradient-based methods in terms of both visual perception and numerical indexes.
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This work is supported by the National Natural Science Foundation of China under grant 12071196.
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Li, R., Zheng, B. The ℓ2,p regularized total variation with overlapping group sparsity prior for image restoration with impulse noise. Numer Algor 91, 1779–1814 (2022). https://doi.org/10.1007/s11075-022-01322-x
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DOI: https://doi.org/10.1007/s11075-022-01322-x