New Representations toward more User-Friendly 3D Synthesis

Xavier Granier 1, 2
1 IPARLA - Visualization and manipulation of complex data on wireless mobile devices
Université Sciences et Technologies - Bordeaux 1, Inria Bordeaux - Sud-Ouest, École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB), CNRS - Centre National de la Recherche Scientifique : UMR5800
Abstract : In this document, we explore the different steps usually required for image synthesis. The main focus of this exploration is to take as much as possible users into account. The creation of 3D images relies first on the definition of a collection of 3D models and on their relative positions. For this purpose, we explore sketch-based modeling tools for 3D meshes, extending the use of shape curves from silhouettes to profile, and exposing all the different steps of the reconstruction process together with the underlying representation. We also explore the use of such tools when users are standing in front of large displays. Once the object geometry is defined, users have to work on designing its appearance, result of the interaction of light with its reflective material and geometry. We introduce a new BRDF model and its modeling tools to extend the range of possible lighting effects. Since the object shape participate also the shading perception, we also introduce a shape descriptor to extract continuous information of convexity and curvedness. This real-time analysis is used to re-introduce them in different shading styles. Finally, we introduce a new lighting representation that may be used for user edition of global illumination. This representation is based on a regular grid of vector quantities storing the incoming lighting. The combination of volumetric and vector representation make it suitable for all algorithms that have to deal with the geometric complexity of 3D scenes.
Document type :
Habilitation à diriger des recherches
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https://tel.archives-ouvertes.fr/tel-00434045
Contributor : Xavier Granier <>
Submitted on : Friday, November 20, 2009 - 3:58:56 PM
Last modification on : Saturday, October 26, 2019 - 10:58:09 PM
Long-term archiving on : Thursday, June 30, 2011 - 11:58:12 AM

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  • HAL Id : tel-00434045, version 1

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Xavier Granier. New Representations toward more User-Friendly 3D Synthesis. Human-Computer Interaction [cs.HC]. Université Sciences et Technologies - Bordeaux I, 2009. ⟨tel-00434045⟩

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