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Proceedings Paper

Reassigned scalograms and their fast algorithms
Author(s): Patrick Flandrin; Eric Chassande-Mottin; Patrice Abry
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Paper Abstract

Reassignment is a technique which consists in moving the computed value of a time-frequency or time-scale energy distribution to a different location in the plane, so as to increase its readability. In the case of scalograms (squared modulus of wavelet transforms), a general form is given for the reassignment operators and their properties are discussed with respect to the chosen wavelet. Characterization of local singularities after reassignment is investigated by simulation and some examples (from mathematics and physics) are presented in order to support the usefulness of the approach. Since reassigning a scalogram amounts to compute two extra wavelet transforms, it is finally shown how this can be achieved in a fast and efficient way within a multiresolution framework.

Paper Details

Date Published: 1 September 1995
PDF: 12 pages
Proc. SPIE 2569, Wavelet Applications in Signal and Image Processing III, (1 September 1995); doi: 10.1117/12.217571
Show Author Affiliations
Patrick Flandrin, CNRS-Ecole Normale Superieure de Lyon (France)
Eric Chassande-Mottin, CNRS-Ecole Normale Superieure de Lyon (France)
Patrice Abry, CNRS-Ecole Normale Superieure de Lyon (France)


Published in SPIE Proceedings Vol. 2569:
Wavelet Applications in Signal and Image Processing III
Andrew F. Laine; Michael A. Unser, Editor(s)

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