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Abstract:
Image restoration is a core problem in computer vision and image processing. In this paper, we introduce a unified low-patch-rank minimization model, which possesses one nuclear norm regularization term promoting the low-patch-rankness, and two sparse regularization terms including the classical total variation (TV) norm and a general sparse term under certain transform such as discrete cosine transform. By setting balancing parameters, our unified model reduces to the classical TV-regularized low-patch-rank minimization model and yields a new non-TV-regularized low-patch-rank prior image restoration model. Due to the multi-block structure of the model, we introduce a three-block alternating minimization algorithm to find approximate solutions of the proposed models. A series of computational results on image inpainting and deblurring further show that our approaches are reliable to recover high-quality images from degraded ones. © 2022 Elsevier Inc.
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Source :
Applied Mathematical Modelling
ISSN: 0307-904X
Year: 2022
Volume: 112
Page: 786-799
5 . 0
JCR@2022
4 . 4 0 0
JCR@2023
ESI HC Threshold:66
JCR Journal Grade:1
CAS Journal Grade:1
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 0
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