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Publications de A. Crouzil
Résultat de la recherche dans la liste des publications :
Article |
1 - A Multiresolution Approach for Shape from Shading Coupling Deterministic and Stochastic Optimization.
A. Crouzil et X. Descombes et J.D. Durou. IEEE Trans. Pattern Analysis ans Machine Intelligence, 25(11): pages 1416--1421, novembre 2003.
Note : Special section on `Energy minimization methods in computer vision and pattern recognition'
@ARTICLE{crouzilXDJDD,
|
| author |
= |
{Crouzil, A. and Descombes, X. and Durou, J.D.}, |
| title |
= |
{A Multiresolution Approach for Shape from Shading Coupling Deterministic and Stochastic Optimization}, |
| year |
= |
{2003}, |
| month |
= |
{novembre}, |
| journal |
= |
{IEEE Trans. Pattern Analysis ans Machine Intelligence}, |
| volume |
= |
{25}, |
| number |
= |
{11}, |
| pages |
= |
{1416--1421}, |
| note |
= |
{Special section on `Energy minimization methods in computer vision and pattern recognition'}, |
| pdf |
= |
{http://ieeexplore.ieee.org/iel5/34/27807/01240116.pdf?tp=&arnumber=1240116&isnumber=27807}, |
| keyword |
= |
{} |
| } |
|
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Rapport de recherche et Rapport technique |
1 - A Multiresolution Approach for Shape from Shading Coupling Deterministic and Stochastic Optimization.
A. Crouzil et X. Descombes et J.D. Durou. Rapport de Recherche 5006, INRIA, France, décembre 2003.
Mots-clés : Shape from shading, Recuit Simule, Optimisation, Multiresolution.
@TECHREPORT{Crouzil03,
|
| author |
= |
{Crouzil, A. and Descombes, X. and Durou, J.D.}, |
| title |
= |
{A Multiresolution Approach for Shape from Shading Coupling Deterministic and Stochastic Optimization}, |
| year |
= |
{2003}, |
| month |
= |
{décembre}, |
| institution |
= |
{INRIA}, |
| type |
= |
{Research Report}, |
| number |
= |
{5006}, |
| address |
= |
{France}, |
| url |
= |
{https://hal.inria.fr/inria-00071578}, |
| pdf |
= |
{https://hal.inria.fr/file/index/docid/71578/filename/RR-5006.pdf}, |
| ps |
= |
{https://hal.inria.fr/docs/00/07/15/78/PS/RR-5006.ps}, |
| keyword |
= |
{Shape from shading, Recuit Simule, Optimisation, Multiresolution} |
| } |
Résumé :
Le Shape from shading est un problème inverse mal posé pour lequel aucune méthode de résolution complètement satisfaisante n'a encore été proposée. Dans ce rapport technique, nous ramenons le à un problème d'optimisation. Nous montrons d'abord que l'approche déterministe fournit des algorithmes efficaces en termes de temps de calcul, mais est d'un intérêt limité lorsque l'énergie comporte des minima locaux très profonds. Nous proposons comme alternative une approche stochastique utilisant le recuit simulé. Les résultats obtenus dépassent largement ceux de l'approche déterministe. La contrepartie est l'extrême lenteur du processus d'optimisation. Pour cette raison, nous proposons une approche hybride qui combine les approches déterministe et stochastique dans un cadre de multi-résolution. |
Abstract :
Shape from shading is an ill-posed inverse problem for which there is no completely satisfactory solution in the existing literature. In this technical report, we address shape from shading as an energy minimization problem. We first show that the deterministic approach provides efficient algorithms in terms of CPU time, but reaches its limits since the energy associated to shape from shading can contain multiple deep local minima. We derive an alternative stochastic approach using simulated annealing. The obtained results strongly outperform the results of the deterministic approach. The shortcoming is an extreme slowness of the optimization. Therefore, we propose an hybrid approach which combines the deterministic and stochastic approaches in a multiresolution framework. |
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