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Cited by 2,394

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Efficient sparse coding algorithms

Lee, Honglak, Battle, Alexis, Raina, Rajat, Ng, Andrew Y.·2007·Advances in Neural Information Processing Systems 19

Abstract

Sparse coding provides a class of algorithms for finding succinct representations of stimuli; given only unlabeled input data, it discovers basis functions that capture higher-level features in the data. However, finding sparse codes remains a very difficult computational problem. In this paper, we present efficient sparse coding algorithms that are based on iteratively solving two convex optimization problems: an L1-regularized least squares problem and an L2-constrained least squares problem. We propose novel algorithms to solve both of these optimization problems. Our algorithms result in a significant speedup for sparse coding, allowing us to learn larger sparse codes than possible with previously described algorithms. We apply these algorithms to natural images and demonstrate that the inferred sparse codes exhibit end-stopping and non-classical receptive field surround suppression and, therefore, may provide a partial explanation for these two phenomena in V1 neurons. 1

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Metadata

Authors
Lee, H., Battle, A., Raina, R., & Ng, A. Y.
Venue
Advances in Neural Information Processing Systems 19
Publisher
The MIT Press
Published
2007-09-07
Pages
801-808
OpenAlex
W2113606819
Cited by
2,394
References
3
FWCI
117.59
Type
book chapter
Language
en
Open access
closed

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