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Stylisation temporellement cohérente d'animations 3D basée sur des textures

Abstract : This PhD thesis deals with expressive rendering, a sub-field of computer graphics which aims at defining creation and processing tools to stylize images and animations. It has applications in all the fields that need depictions more stylized than photographs, such as entertainment (e.g., video games, animated films, cartoons), virtual heritage, technical illustration, etc. A crucial criterion to assert the quality of an image is the absence of visual artifacts. While already true for traditional art, this consideration is especially important in computer graphics. Indeed the intrinsic discrete nature of an image can lead to artifacts. This is even more noticeable during animations, as temporal artifacts are added to spatial ones. The goal of this thesis is twofold: (1) To formalize and measure these artifacts by taking into account human perception; (2) To propose new interactive methods to stylize 3D animations. First we present a set of techniques to ensure the coherence of line drawings extracted form 3D animated scenes. Then we propose two methods to stylize shaded regions, which allow to create a wide variety of patterns. The shared ground layer of all these approaches is the use of temporally varying textures to represent the simulated media (e.g., watercolor pigments, brush strokes). Finally we describe two user studies aiming at evaluating the quality of the results produced by such techniques.
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Submitted on : Friday, October 7, 2011 - 12:17:47 PM
Last modification on : Thursday, March 26, 2020 - 8:49:16 PM
Document(s) archivé(s) le : Sunday, January 8, 2012 - 2:26:03 AM

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  • HAL Id : tel-00630112, version 1

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Pierre Bénard. Stylisation temporellement cohérente d'animations 3D basée sur des textures. Mathématiques générales [math.GM]. Université Grenoble Alpes, 2011. Français. ⟨NNT : 2011GRENM024⟩. ⟨tel-00630112⟩

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