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Theses

Communication expressive de la forme au travers de l'éclairement et du rendu au trait

Romain Vergne 1, 2
2 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 : Expressive rendering aims at designing algorithms that allow to control the way images are created. More precisely, it provides the possibility to convey a specific message using a given style, even if non-physically based techniques have to be used. In this thesis, we propose a formalization for expressive rendering, by decomposing it into a message to convey in a 3D scene, and the style used to create the final image. We will concentrate our work on two topics that have a same message : object shape enhancement on dynamic scenes. In the first part of this thesis, we propose new solutions for exaggerating surface details through shading. We show how to extract relevant surface features by taking the human visual system into account. Our approach then allows to detect view-dependant surface details and provides automatic levels-of-detail on dynamic scenes. This message is used for modifying the way lights interact with 3D objects and for creating various styles, from minimal black and white toon shading to realistic rendering. In the second part of this thesis, we propose a new approach for conveying surface details using line-based rendering. We show that all kind of lines may be extracted via a single general definition, in a temporally and spatially coherent way. Next, we show how to apply an implicit stylization along the detected features, in order to obtain various styles and original effects. We discuss the limitations of both techniques in the third part of the thesis. We show that our perception of appearance is an essential element that have to be taken into account in future work. Messages and styles could evolute in a more coherent and intuitive model.
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Submitted on : Monday, May 23, 2011 - 2:32:23 PM
Last modification on : Tuesday, February 8, 2022 - 9:10:02 AM
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Romain Vergne. Communication expressive de la forme au travers de l'éclairement et du rendu au trait. Autre [cs.OH]. Université Sciences et Technologies - Bordeaux I, 2010. Français. ⟨tel-00595068⟩

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