Fast design of efficient dictionaries for sparse representations

Rusu, Cristian (2012) Fast design of efficient dictionaries for sparse representations. In: 2012 IEEE International Workshop on Machine Learning for Signal Processing. IEEE, Santander, pp. 1-5. ISBN 9781467310260

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Abstract

One of the central issues in the field of sparse representations is the design of overcomplete dictionaries with a fixed sparsity level from a given dataset. This article describes a fast and efficient procedure for the design of such dictionaries. The method implements the following ideas: a reduction technique is applied to the initial dataset to speed up the upcoming procedure; the actual training procedure runs a more sophisticated iterative expanding procedure based on K-SVD steps. Numerical experiments on image data show the effectiveness of the proposed design strategy.

Item Type:	Book Section
Subjects:	Q Science > QA Mathematics > Electronic computers. Computer science T Technology > T Technology (General) > Information Technology > Electronic computers. Computer science
Divisions:	School of Computing > Staff Research and Publications
Depositing User:	Caoimhe Ní Mhaicín
Date Deposited:	03 Jul 2018 11:36
Last Modified:	03 Jul 2018 11:36
URI:	https://norma.ncirl.ie/id/eprint/3058

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