Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/13214
Title: Multifractal wavelet filter of natural images
Author: Turiel Martínez, Antonio M.
Parga, Néstor
Keywords: Física mèdica
Òptica
Dinàmica de fluids
Biological and medical physics
Optics
Fluid dynamics
Issue Date: 2000
Publisher: American Physical Society
Abstract: Natural images are characterized by the multiscaling properties of their contrast gradient, in addition to their power spectrum. In this Letter we show that those properties uniquely define an intrinsic wavelet and present a suitable technique to obtain it from an ensemble of images. Once this wavelet is known, images can be represented as expansions in the associated wavelet basis. The resulting code has the remarkable properties that it separates independent features at different resolution level, reducing the redundancy, and remains essentially unchanged under changes in the power spectrum. The possible generalization of this representation to other systems is discussed.
Note: Reproducció digital del document publicat proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevLett.85.3325
It is part of: Physical Review Letters, 2000, vol. 85, núm. 15, p. 3325-3328
URI: http://hdl.handle.net/2445/13214
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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