Time-frequency and time-scale vector fields for deforming time-frequency and time-scale representations | Zendy

Laurent Daudet | Zendy; Marcela Morvidone | Zendy; Bruno Torrésani | Zendy

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<title>Time-frequency and time-scale vector fields for deforming time-frequency and time-scale representations</title>

Author(s) -

Laurent Daudet,

Marcela Morvidone,

Bruno Torrésani

Publication year - 1999

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.366763

Subject(s) - time–frequency analysis , time–frequency representation , deblurring , scale (ratio) , basis (linear algebra) , vector field , algorithm , computer science , focus (optics) , field (mathematics) , mathematics , geometry , artificial intelligence , physics , pure mathematics , telecommunications , image processing , image (mathematics) , optics , quantum mechanics , image restoration , radar

International audienceWe study local deformations of time-frequency and timescale representations, in the framework of the so-called reassignment methods, which aim at " deblurring " time-frequency representations. We focus on deformations generated by appropriate vector fields defined on time-frequency or time scale plane, and constructed on the basis of geometric and group-theoretical arguments. Such vector fields may be used as such for signal analysis (as quantities generalizing instantaneous frequency or group delay) in the framework of reassignment algorithms

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