Efficient Impostor Manipulation for Real-Time Visualization of Urban Scenery

François X. Sillion 1 George Drettakis 1, * Benoit Bodelet 1
* Auteur correspondant
1 iMAGIS - Models, Algorithms and Geometry for Computer Generated Image Graphics
GRAVIR - IMAG - Graphisme, Vision et Robotique, Inria Grenoble - Rhône-Alpes
Abstract : Urban environments present unique challenges to interactive visualization systems, because of the huge complexity of the geometrical data and the widely varying visibility conditions. The paper introduces a new framework for real-time visualization of such urban scenes. The central concept is that of a dynamic segmentation of the dataset, into a local three dimensional model and a set of impostors used to represent distant scenery. A segmentation model is presented, based on inherent urban structures. A new impostor structure is introduced, derived from the level-of-detail approach. Impostors combine three-dimensional geometry to correctly model large depth discontinuities and parallax, and textures to rapidly display visual detail. We present the algorithm necessary for the creation of accurate and efficient three-dimensional impostors. The implementation of our algorithms allows interactive navigation in complex urban databases, as required by many applications.
Type de document :
Communication dans un congrès
D. Fellner and L. Szirmay-Kalos. Computer Graphics Forum (Proc. of Eurographics '97), 1997, Budapest, Hungary. 16, pp.207--218, 1997
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François X. Sillion, George Drettakis, Benoit Bodelet. Efficient Impostor Manipulation for Real-Time Visualization of Urban Scenery. D. Fellner and L. Szirmay-Kalos. Computer Graphics Forum (Proc. of Eurographics '97), 1997, Budapest, Hungary. 16, pp.207--218, 1997. 〈inria-00510095〉

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