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Title

A Robust Multiscale B-spline Function Decomposition Process to Motion Transparency Estimation

Authors
Pingault, M.
Pellerin, D.
Published in IEEE Transactions on Image Processing. 2003, vol. 12, no. 11, p. 1416-1426
Abstract Motion transparency phenomena in image sequences are frequent, but classical methods of motion estimation are unable to deal with them. This paper describes a method for estimating optical flow by a generalization of the brightness constancy assumption to additive transparencies. The brightness constancy assumption is obtained by setting constant velocity fields during three images of a sequence. Thus, by a Taylor development to its second order, we reach an extension of the optical flow constraint equation. Since the equation is nonlinear, the Levenberg-Marquardt algorithm is used. In order to suppress the unavoidable aperture problem, a global model based on B-spline basis functions is applied with the aim of constraining optical flows. This description of motion allows us to work on a coarse to fine estimation of artificial image sequences that shows good convergence properties. It is also applied to natural image sequences.
Keywords convergence of numerical methodsimage sequencesmotion estimationnonlinear equationssplines (mathematics)
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Research groups Computer Vision and Multimedia Laboratory
Multimodal Interaction Group
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PINGAULT, M., BRUNO, Eric, PELLERIN, D. A Robust Multiscale B-spline Function Decomposition Process to Motion Transparency Estimation. In: IEEE Transactions on Image Processing, 2003, vol. 12, n° 11, p. 1416-1426. https://archive-ouverte.unige.ch/unige:47480

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Deposited on : 2015-03-03

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