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Contrôle Automatique de Qualité pour l' Éclairage Global

Xavier Granier 1, 2 
1 REVES - Rendering and virtual environments with sound
CRISAM - Inria Sophia Antipolis - Méditerranée
2 iMAGIS - Models, Algorithms and Geometry for Computer Generated Image Graphics
GRAVIR - IMAG - Laboratoire d'informatique GRAphique, VIsion et Robotique de Grenoble, Inria Grenoble - Rhône-Alpes
Abstract : In this thesis, we present a new approach which integrates hierarchical radiosity with clustering with a particle tracing method, thus simulating all global illumination phenomena. Initially, we show how this integration is possible. We restrict particle tracing only to light exchanges for which this is necessary. To achieve this, we use the link structure created by hierarchical radiosity with clustering. This structure can be regarded as a subdivision of the space of light exchanges. We then explain how to integrate the energy of these particles into the normal radiosity solution. This unified algorithm allows automaticdetection of the regions where particle tracing is required. It also allows smooth and natural variation between a first fast solution offering initial visualization of the final result, and a higher quality solution, but with higher computation time. The second contribution of this thesis is to show how our unified approach can deal with dynamic scenes. We introduce a spatial structure to efficiently detect which particles are affected by object motion and which particles should thus be re-emitted. This detection also uses the link structure. To accelerate and improve the result, we introduce a new reconstruction method for light effects due to particles, using textures. The algorithm thus presented allows fast incremental updates for dynamic scenes. The third contribution is a final gather method. In this approach, we gather the information contained in a solution from our unified method, and we then use it to compute very high quality images, with all global illumination effects.
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Submitted on : Tuesday, November 30, 2010 - 7:19:41 PM
Last modification on : Friday, March 25, 2022 - 11:10:34 AM
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  • HAL Id : tel-00524825, version 2



Xavier Granier. Contrôle Automatique de Qualité pour l' Éclairage Global. Synthèse d'image et réalité virtuelle [cs.GR]. Université Joseph-Fourier - Grenoble I, 2001. Français. ⟨tel-00524825v2⟩



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