Journal
SIAM JOURNAL ON SCIENTIFIC COMPUTING
Volume 32, Issue 5, Pages 2710-2736Publisher
SIAM PUBLICATIONS
DOI: 10.1137/090774823
Keywords
total-variation; image restoration; image reconstruction; alternating direction method; augmented Lagrangian
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Funding
- HKRGC
- HKBU
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In this paper, we study alternating direction methods for solving constrained total-variation image restoration and reconstruction problems. Alternating direction methods can be implementable variants of the classical augmented Lagrangian method for optimization problems with separable structures and linear constraints. The proposed framework allows us to solve problems of image restoration, impulse noise removal, inpainting, and image cartoon+texture decomposition. As the constrained model is employed, we need only to input the noise level, and the estimation of the regularization parameter is not required in these imaging problems. Experimental results for such imaging problems are presented to illustrate the effectiveness of the proposed method. We show that the alternating direction method is very efficient for solving image restoration and reconstruction problems.
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