Identification of velocity fields for geophysical fluids from a sequence of images

Didier Auroux; Jérôme Fehrenbach

inria-00328990, version 1

Identification of velocity fields for geophysical fluids from a sequence of images

Didier Auroux ()^a^, 1, Jérôme Fehrenbach () ²

N° RR-6675 (2008)

Résumé : We propose an algorithm to estimate the motion between two images. This algorithm is based on the nonlinear brightness constancy assumption. The number of unknowns is reduced by considering displacement fields that are piecewise linear with respect to each space variable, and the Jacobian matrix of the cost function to be minimized is assembled rapidly using a finite element method. Different regularization terms are considered, and a multiscale approach provides fast and efficient convergence properties. Several numerical results of this algorithm on simulated and real geophysical flows are presented and discussed.

a – Université Paul Sabatier - Toulouse III
1 : MOISE (INRIA Grenoble Rhône-Alpes / LJK Laboratoire Jean Kuntzmann)
CNRS : UMR5224 – INRIA – Laboratoire Jean Kuntzmann – Université Joseph Fourier - Grenoble I – Institut Polytechnique de Grenoble - Grenoble Institute of Technology
2 : Institut de Mathématiques de Toulouse (IMT)
Université Paul Sabatier [UPS] - Toulouse III – Université Toulouse le Mirail - Toulouse II – Université des Sciences Sociales - Toulouse I – Institut National des Sciences Appliquées (INSA) - Toulouse – CNRS : UMR5219

inria-00328990, version 1
http://hal.inria.fr/inria-00328990
oai:hal.inria.fr:inria-00328990
Contributeur : Didier Auroux <>
Soumis le : Vendredi 10 Octobre 2008, 13:46:11
Dernière modification le : Vendredi 17 Octobre 2008, 13:55:48

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