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Courbes, cylindres et métamorphoses pour l'image de synthèse

Francis Lazarus 1
1 SYNTIM - Image Analysis and Synthesis
Inria Paris-Rocquencourt
Abstract : The Morphing of two shapes is often used in computer animations. Generally morphing techniques make use of 2D methods such as image composition. Actually, there are still many practical and technical problems when trying to morph 3D objects such as polyhedral meshes. We propose a morphing technique adapted to tubular objects. A skeleton curve is associated with each object in order to define a cylindrical parametrisation. The transformation of the skeleton curves of two objects jointly with their parametrisation are the main components of the method. In this context, we focus our attention on two particular points\,: In order to animate the curves we introduce a method of interpolating polylines based on a regular homotopy in Lie groups. Furthermore, associating a skeleton curve to an object may be quite tricky. Hence, we propose a tool to construct such a curve whose definition is original and is based on a combinatorial analogy with the Morse theory. These studies finally lead us to elaborate an interactive tool for 3D morphing. This tool is characterized by its ease of used and by its intuitive parameters.
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https://tel.archives-ouvertes.fr/tel-00006284
Contributor : Francis Lazarus <>
Submitted on : Thursday, June 17, 2004 - 6:40:40 PM
Last modification on : Friday, May 25, 2018 - 12:02:05 PM
Long-term archiving on: : Friday, April 2, 2010 - 8:02:58 PM

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  • HAL Id : tel-00006284, version 1

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Francis Lazarus. Courbes, cylindres et métamorphoses pour l'image de synthèse. Modélisation et simulation. Université Paris-Diderot - Paris VII, 1995. Français. ⟨tel-00006284⟩

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