| HAL : hal-00659019, version 1 |
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| 7th International Symposium on Visual Computing - ISVC2011, Las Vegas : United States (2011) |
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| Adaptive Discrete Laplace Operator |
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| Christophe Fiorio 1Christian Mercat 2, 3 |
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| (2011) |
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| Diffusion processes capture information about the geometry of an object such as its curvature, symmetries and particular points. The evolution of the diffusion is governed by the Laplace-Beltrami operator which presides to the diffusion on the manifold. In this paper, we define a new discrete adaptive Laplacian for digital objects, gener- alizing the operator defined on meshes. We study its eigenvalues and eigenvectors recovering interesting geometrical informations. We discuss its convergence towards the usual Laplacian operator especially on lat- tice of diamonds. We extend this definition to 3D shapes. Finally we use this Laplacian in classical but adaptive denoising of pictures preserving zones of interest like thin structures. |
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| 1 : | Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier (LIRMM) |
| CNRS : UMR5506 – Université Montpellier II - Sciences et techniques | |
| 2 : | Institut Camille Jordan (ICJ) |
| CNRS : UMR5208 – Université Claude Bernard - Lyon I – Ecole Centrale de Lyon – Institut National des Sciences Appliquées (INSA) - Lyon | |
| 3 : | Sciences et Société ; Historicité, Éducation et Pratiques (EA S2HEP) |
| Université Claude Bernard - Lyon I : EA4148 – École Normale Supérieure - Lyon | |
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| INFO/ARITH ARITH |
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| Domaine | : | Informatique/Traitement des images |
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| Liste des fichiers attachés à ce document : | |||||
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| hal-00659019, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00659019 | |
| oai:hal.archives-ouvertes.fr:hal-00659019 | |
| Contributeur : Christian Mercat | |
| Soumis le : Jeudi 12 Janvier 2012, 09:15:24 | |
| Dernière modification le : Jeudi 12 Janvier 2012, 09:33:34 | |