112 search results - page 16 / 23 » On Sparsity and Overcompleteness in Image Models |
139
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TSP
2010
14 years 8 months ago
2010
Abstract--In this paper, we investigate various channel estimators that exploit channel sparsity in the time and/or Doppler domain for a multicarrier underwater acoustic system. We...
NIPS
2007
15 years 2 months ago
2007
It has been shown that adapting a dictionary of basis functions to the statistics of natural images so as to maximize sparsity in the coefficients results in a set of dictionary ...
ICASSP
2009
IEEE
15 years 8 months ago
2009
IEEE
Automatic image tagging is important yet challenging due to the semantic gap and the lack of learning examples to model a tag’s visual diversity. Meanwhile, social user tagging ...
105
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IGARSS
2009
14 years 11 months ago
2009
Many problems in remote sensing can be modeled as the minimization of the sum of a data term and a prior term. We propose to use a new complex wavelet based prior and an efficient...
112
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DCC
2004
IEEE
16 years 25 days ago
2004
IEEE
It is well-known that wavelet transforms provide sparse decompositions over many types of image regions but not over image singularities/edges that manifest themselves along curve...