An Overcomplete Dictionary Learning Algorithm for Tensor Sparse Representation (医用画像)
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概要
- 論文の詳細を見る
Recently sparse coding has received expressions of interest in the field of pattern recognition. Most existing methods take the data-as-vector formulation, and deal with images (the second order tensor) or volume (the third order tensor) by vectorization. However, such kind of vectorization will lose the original structure of the data and reduce the reliability of post processing, leading a poor representation. In this paper, we propose a new algorithm of overcomplete dictionary learning for tensor sparse coding, named K-CPD, by extension of K-SVD from vector formulation to tensor formulation. A multilinear orthogonal matching pursuit (MOMP) algorithm is also developed for calculating sparse representation of tensor signal. We evaluate the performance of K-CPD for image denoising, and the results demonstrate that the proposed method surpasses the conventional methods.
- 一般社団法人電子情報通信学会の論文
- 2012-05-10
著者
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Chen Yen-wei
College Of Information And Science Ristumeikan University
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Chen Yen-wei
College of Information Science and Engineering, Ritsumeikan University
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DUAN Guifang
Global Innovation Research Institute, Ritsumeikan University
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DENG Junping
College of Information Science and Engineering, Ritsumeikan University
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