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Explicit Shift-Invariant Dictionary Learning

Rusu, Cristian and Dumitrescu, Bogdan and Tsaftaris, Sotirios A. Explicit Shift-Invariant Dictionary Learning. IEEE Signal Processing Letters, 21 (1). pp. 6-9. ISSN 1070-9908 (2014)

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In this letter we give efficient solutions to the construction of structured dictionaries for sparse representations. We study circulant and Toeplitz structures and give fast algorithms based on least squares solutions. We take advantage of explicit circulant structures and we apply the resulting algorithms to shift-invariant learning scenarios. Synthetic experiments and comparisons with state-of-the-art methods show the superiority of the proposed methods.

Item Type: Article
Identification Number: 10.1109/LSP.2013.2288788
Uncontrolled Keywords: Dictionary learning; Shift-invariant learning; Sparse representations
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Z Bibliography. Library Science. Information Resources > Z004 Books. Writing. Paleography
Research Area: Computer Science and Applications
Depositing User: Ms T. Iannizzi
Date Deposited: 20 Nov 2013 11:11
Last Modified: 20 Nov 2013 11:11
URI: http://eprints.imtlucca.it/id/eprint/1917

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