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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Abstract
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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