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Cited by 757

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Comparing Measures of Sparsity

Hurley, Niall, Rickard, Scott·2009·IEEE Transactions on Information Theory

Abstract

Sparsity of representations of signals has been shown to be a key concept of fundamental importance in fields such as blind source separation, compression, sampling and signal analysis. The aim of this paper is to compare several commonly-used sparsity measures based on intuitive attributes. Intuitively, a sparse representation is one in which a small number of coefficients contain a large proportion of the energy. In this paper, six properties are discussed: (Robin Hood, Scaling, Rising Tide, Cloning, Bill Gates, and Babies), each of which a sparsity measure should have. The main contributions of this paper are the proofs and the associated summary table which classify commonly-used sparsity measures based on whether or not they satisfy these six propositions. Only two of these measures satisfy all six: the pq-mean with p les 1, q > 1 and the Gini index.

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Metadata

Authors
Hurley, N., & Rickard, S.
Venue
IEEE Transactions on Information Theory
Published
2009-10
Volume
55
Issue
10
Pages
4723-4741
ISSN
  • 0018-9448 (ISSN-L)
  • 1557-9654
OpenAlex
W2111854888
Cited by
757
References
1
FWCI
13.49
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Comparing Measures of Sparsity. https://app.cochat.ai/papers/10.1109/tit.2009.2027527
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Hurley, N., & Rickard, S. (2009). Comparing Measures of Sparsity. IEEE Transactions on Information Theory. https://doi.org/10.1109/tit.2009.2027527

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