Scalable Online Convolutional Sparse Coding.
IEEE Transactions on Image Processing(2018)
摘要
Convolutional sparse coding (CSC) improves sparse coding by learning a shift-invariant dictionary from the data. However, most existing CSC algorithms operate in the batch mode and are computationally expensive. In this paper, we alleviate this problem by online learning. The key is a reformulation of the CSC objective so that convolution can be handled easily in the frequency domain, and much sma...
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关键词
Image coding,Convolution,Dictionaries,Sparse matrices,Convolutional codes,Optimization,Frequency-domain analysis
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