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• W2059311958 abstract "In this paper, we propose an efficient dictionary learning algorithm for sparse representation of given data and suggest a way to apply this algorithm to 3-D medical image denoising. Our learning approach is composed of two main parts: sparse coding and dictionary updating. On the sparse coding stage, an efficient algorithm named multiple clusters pursuit (MCP) is proposed. The MCP first applies a dictionary structuring strategy to cluster the atoms with high coherence together, and then employs a multiple-selection strategy to select several competitive atoms at each iteration. These two strategies can greatly reduce the computation complexity of the MCP and assist it to obtain better sparse solution. On the dictionary updating stage, the alternating optimization that efficiently approximates the singular value decomposition is introduced. Furthermore, in the 3-D medical image denoising application, a joint 3-D operation is proposed for taking the learning capabilities of the presented algorithm to simultaneously capture the correlations within each slice and correlations across the nearby slices, thereby obtaining better denoising results. The experiments on both synthetically generated data and real 3-D medical images demonstrate that the proposed approach has superior performance compared to some well-known methods." @default.
• W2059311958 created "2016-06-24" @default.
• W2059311958 creator A5065061505 @default.
• W2059311958 creator A5067097659 @default.
• W2059311958 creator A5090531606 @default.
• W2059311958 date "2012-02-01" @default.
• W2059311958 modified "2023-09-27" @default.
• W2059311958 title "An Efficient Dictionary Learning Algorithm and Its Application to 3-D Medical Image Denoising" @default.
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• W2059311958 doi "https://doi.org/10.1109/tbme.2011.2173935" @default.
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