PACANOWSKI, Romain; RAYNAUD, Mickaël; LACOSTE, Julien; GRANIER, Xavier; REUTER, Patrick; SCHLICK, Christophe; POULIN, Pierre

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Licence d’utilisation du document

PACANOWSKI, Romain
Visualization and manipulation of complex data on wireless mobile devices [IPARLA ]
Laboratoire Bordelais de Recherche en Informatique [LaBRI]
Département d'Informatique et de Recherche Opérationnelle [Montreal] [DIRO]

RAYNAUD, Mickaël
Visualization and manipulation of complex data on wireless mobile devices [IPARLA ]
Laboratoire Bordelais de Recherche en Informatique [LaBRI]

LACOSTE, Julien
Laboratoire Informatique de l'Université de Pau et des Pays de l'Adour [LIUPPA]

Langue

Communication dans un congrès

Ce document a été publié dans

The 9th International Symposium on Virtual Reality, Archaeology and Cultural Heritage VAST (2008): Short and Project Paper, 2008-12-02, Braga. 2008

Résumé en anglais

Cultural Heritage scenes usually consist of very large and detailed 3D objects with high geometric complexity. Even the raw visualization of such 3D objects already involves a large amount of memory and computation time. When trying to improve the sense of immersion and realism by using, global illumination techniques the demand on these resources becomes prohibitive Our approach uses regular grids combined with a vector-based representation to efﬁciently capture low-frequency indirect illumination. A ﬁxed set of irradiance vectors is stored in 3D textures (for complex objects) and in 2D textures (for mostly planar objects). The vector-based representation offers additional robustness against local variations of the geometry. Consequently, the grid resolution can be set independently of geometric complexity, and the memory footprint can therefore be reduced. The irradiance vectors can be precomputed on a simpliﬁed geometry. For interactive rendering, we use an appearance preserving simpliﬁcation of the geometry. The indirect illumination within a grid cell is interpolated from its associated irradiance vectors, resulting in an everywhere-smooth reconstruction.< Réduire

URI

https://oskar-bordeaux.fr/handle/20.500.12278/198112

Project ANR

Nature virtuelle: représentations hybrides pour la modélisation, la simulation, la visualisation, et la transmission de scènes naturelles animées. - ANR-05-MMSA-0004

Origine

Importé de hal

Unités de recherche

Laboratoire Bordelais de Recherche en Informatique (LaBRI) - UMR 5800