Clementine Marcovici, 8/19/03

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Efficient representation of images in an over-complete basis
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Contrary to the common view, an 
over-complete basis can be as efficient as an orthogonal 
representation. The "efficiency" is measured in terms of empirical 
approximation bounds: with an appropriate ordering of coefficients, the 
error as a function of the number of coefficients used in the 
reconstruction decreases as fast (or faster) for the steerable pyramid 
as for orthogonal wavelets.