Rician noise removal via weighted nuclear norm penalization
Rician noise removal via weighted nuclear norm penalization
复制标题
通过加权核范数惩罚消除莱斯噪声
DOI:
10.1016/j.acha.2020.12.005
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发表时间:
2021-07
影响因子:
2.5
通讯作者:
Yuru Zou
中科院分区:
文献类型:
--
作者:
Jian Lu;Jiapeng Tian;Qingtang Jiang;Xiaoxia Liu;Zhenwei Hu;Yuru Zou
Rician noise is a common noise that naturally appears in Magnetic Resonance Imaging (MRI) images. Low rank matrix approximation approaches have been widely used in image processing, which takes advantage of the non-local self-similarity between patches in a natural image. The weighted nuclear norm minimization method as a low rank matrix approximation approach has shown to be an effective approach for image denoising. Inspired by this, we propose in this paper a maximum a posteriori (MAP) model with the weighted nuclear norm as a regularization constraint to remove Rician noise. The MAP data fidelity term has a Lipschitz continuous gradient and the weighted nuclear norm can be efficiently minimized. We propose an iterative weighted nuclear norm minimization algorithm (IWNNM) to solve the proposed non-convex model and analyze the convergence of our algorithm. The computational results show that our proposed method is promising in restoring images corrupted with Rician noise.
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DOI:
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Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention
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DOI:
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Set-Valued Analysis
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