Stéphane Grabli

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Figure 1: A programmable approach unifies the specification of line drawing styles, allowing for various complex styles descriptions. Left: Use of occlusion information to emphasize some parts in the scene. Right: A sketchy style based on the use of " construction lines ". Abstract This paper introduces a programmable approach to non-photorealistic line(More)
We introduce an image-based method for modeling a specific subject's hair. The principle of the approach is to study the variations of hair illumination under controlled illumination. The use of a stationary viewpoint and the assumption that the subject is still allows us to work with perfectly registered images: all pixels in an image sequence represent(More)
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt età la diffusion(More)
This article introduces a programmable approach to nonphotorealistic line drawings from 3D models, inspired by programmable shaders in traditional rendering. This approach relies on the assumption generally made in NPR that style attributes (color, thickness, etc.) are chosen depending on generic properties of the scene such as line characteristics or depth(More)
One subtle artifact which still often reveals the synthetic nature of a digital creature on screen is the stretching of a supposedly rigid feature, such as a dinosaur scale or a callus, under deformation. We introduce a technique which attempts to preserve the shape of user-defined features when a 3D mesh deforms. Our approach makes no restriction on the(More)
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