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Combining Higher-Order Wavelets and Discontinuity Meshing: a Compact Representation for Radiosity

Nicolas Holzschuch 1 Laurent Alonso 2
1 ARTIS - Acquisition, representation and transformations for image synthesis
GRAVIR - IMAG - Laboratoire d'informatique GRAphique, VIsion et Robotique de Grenoble, Inria Grenoble - Rhône-Alpes, CNRS - Centre National de la Recherche Scientifique : FR71
2 ISA - Models, algorithms and geometry for computer graphics and vision
INRIA Lorraine, LORIA - Laboratoire Lorrain de Recherche en Informatique et ses Applications
Abstract : The radiosity method is used for global illumination simulation in diffuse scenes, or as an intermediate step in other methods. Radiosity computations using Higher-Order wavelets achieve a compact representation of the illumination on many parts of the scene, but are more expensive near discontinuities, such as shadow boundaries. Other methods use a mesh, based on the set of discontinuities of the illumination function. The complexity of this set of discontinuities has so far proven prohibitive for large scenes, mostly because of the difficulty to robustly manage a geometrically complex set of triangles. In this paper, we present a method for computing radiosity that uses higher-order wavelet functions as a basis, and introduces discontinuities only when they simplify the resulting mesh. The result is displayed directly, without post-processing.
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Submitted on : Monday, November 30, 2009 - 2:35:45 PM
Last modification on : Friday, February 26, 2021 - 3:28:03 PM
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Nicolas Holzschuch, Laurent Alonso. Combining Higher-Order Wavelets and Discontinuity Meshing: a Compact Representation for Radiosity. Eurographics Symposium on Rendering 2004 - EGSR 2004, Jun 2004, Norrköping, Sweden. pp.275-286. ⟨inria-00100041⟩

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