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Brendt Wohlberg, "Efficient Algorithms for Convolutional Sparse Representations", IEEE Transactions on Image Processing, vol. 25, no. 1, doi:10.1109/TIP.2015.2495260, pp. 301--315, Jan 2016

Abstract

When applying sparse representation techniques to images, the standard approach is to independently compute the representations for a set of overlapping image patches. This method performs very well in a variety of applications, but results in a representation that is multi-valued and not optimised with respect to the entire image. An alternative representation structure is provided by convolutional sparse representation, in which a sparse representation of an entire image is computed by replacing the linear combination of a set of dictionary vectors by the sum of a set of convolutions with dictionary filters. The resulting representation is both single-valued and jointly optimised over the entire image. While this form of sparse representation has been applied to a variety of problems in signal and image processing and computer vision, the computational expense of the corresponding optimisation problems has restricted application to relatively small signals and images. This paper presents new, efficient algorithms that substantially improve on the performance of other recent methods, contributing to the development of this type of representation as a practical tool for a wider range of problems.

BibTeX Entry

@article{wohlberg-2016-efficient,
author = {Brendt Wohlberg},
title = {Efficient Algorithms for Convolutional Sparse Representations},
year = {2016},
month = Jan,
urlpdf = {http://math.lanl.gov/~brendt/Publications/Docs/wohlberg-2016-efficient.pdf},
urlcode = {http://math.lanl.gov/~brendt/Software/SPORCO/},
journal = {IEEE Transactions on Image Processing},
volume = {25},
number = {1},
doi = {10.1109/TIP.2015.2495260},
pages = {301--315}
}