Modélisation et rendu d'images réalistes de paysages naturels

Christophe Chaudy 1
1 iMAGIS - Models, Algorithms and Geometry for Computer Generated Image Graphics
GRAVIR - IMAG - Graphisme, Vision et Robotique, Inria Grenoble - Rhône-Alpes
Abstract : Today, realistic image synthesis of natural landscapes still remains a challenge in the field of computer graphics. Although convincing visual models of plants exist, they cannot be integrated in very large scenes with numerous natural elements. We present a model to create and render several types of fuzzy objects such as trees, grass and clouds. This model bypasses the geometric complexity problem and offers facilities to define natural structures. Particle systems are used to build the object geometry and a finite state automata to control the particle behaviour. So, the branch geometry, the leaf position and other geometric parameters are defined by the particle trajectory in the 3D space. Furthermore, a natural landscape scene may be composed of many elements, we propose fast and precise methods, based on multi-texture representation, to efficiently render multi-resolution vegetation elements. All these models are simple and fast and thus, very suitable to be integrated in a natural landscape rendering system. We present such a specialized architecture dedicated to the rendering of realistic images over an heterogeneous computer network.
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Christophe Chaudy. Modélisation et rendu d'images réalistes de paysages naturels. Interface homme-machine [cs.HC]. Université Joseph-Fourier - Grenoble I, 1997. Français. ⟨tel-00004925⟩

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