MRI Denoising Based on a Non-Parametric Bayesian Image Sparse Representation Method
MRI Denoising Based on a Non-Parametric Bayesian Image Sparse Representation Method
复制标题
基于非参数贝叶斯图像稀疏表示方法的MRI去噪
DOI:
10.4028/www.scientific.net/amr.219-220.1354
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发表时间:
2011-03
期刊:
影响因子:
--
通讯作者:
Liu Hui
中科院分区:
文献类型:
--
作者:
Chen Xian-bo;Ding Xing-hao;Liu Hui
Magnetic Resonance images are often corrupted by Gaussian noise which highly affects the quality of MR images. In this paper, a Non-Parametric hierarchical Bayesian image sparse representation method is proposed to wipe out Gaussian distribution noise coupling in MR images. In this method a spike-slab prior is imposed on sparse coefficients, and a redundant dictionary is learned from the corrupted image. Experimental results show that the method not only improves the effect of MRI denoising, but also can obtain good estimation of the noise variance. Compared to non-local filter method, this model shows better visual quality as well as higher PSNR.
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DOI:
--
发表时间:
2009-12
期刊:
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影响因子:
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DOI:
10.1109/icassp.2010.5495174
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2010-03
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2010 IEEE International Conference on Acoustics, Speech and Signal Processing
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