Radiance Space, as Represented by the Visibility 2-Skeleton

Jared Hoberock 1 Samuel Hornus 2 John Hart 3
2 ALICE - Geometry and Lighting
Inria Nancy - Grand Est, LORIA - ALGO - Department of Algorithms, Computation, Image and Geometry
Abstract : Since radiance in a vacuum remains constant along rays, the radiance in a scene's free space can be represented as a real function over the space of maximal segments. This space is four dimensional and orga- nized by the visibility complex. To date only the 0-D and 1-D cells of the visibility complex have been constructed and implemented. In order to use this topological space to support radiance samples for image-based rendering, form-factor computations, global illumination and shadowing, we also need to construct its 2-D cells. This paper expands the frontier of our understanding of the visibility complex by constructing and im- plementing its 2-D cells. We demonstrate the capabilities of these 2-cells by using them to organize sparse illumination samples in a scene. These samples interpolate only within the boundaries of the 2-cells, thus avoid- ing aliasing while respecting sharp changes in illumination.
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Communication dans un congrès
ToponVis 2009, Feb 2009, Snowbird, United States. 2009
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Jared Hoberock, Samuel Hornus, John Hart. Radiance Space, as Represented by the Visibility 2-Skeleton. ToponVis 2009, Feb 2009, Snowbird, United States. 2009. 〈hal-00924259〉

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