Title: Pyramidal Hemisphere Subdivision Radiosity. Formal Definition and Improvements
Authors: Jolivet, Vincent
Plemenos, Dimitri
Sbert, Mateu
Citation: WSCG '2000: Conference proceeding: The 8th International Conference in Central Europe on Computers Graphics, Visualization and Interaktive Digital Media '2000 in cooperation with EUROGRAPHICS and IFIP WG 5.10: University of West Bohemia, Plzen, Czech republic, February 7 - 10, 2000, p. 228-235.
Issue Date: 2000
Publisher: University of West Bohemia
Document type: konferenční příspěvek
URI: http://wscg.zcu.cz/wscg2000/Papers_2000/W59.pdf.zip
ISBN: 80-7082-612-6
Keywords: Monte Carlo;dělení hemisfér;heuristické vyhledávání;radiozita
Keywords in different language: radiosity;Monte Carlo;hemisphere subdivision;heuristic search
Abstract: In this paper a complete presentation of Pyramidal Hemisphere subdivision method is given. This method improves Monte Carlo radiosity by sending more rays towards selected directions. More precisely, we determine regions of the scene where the distribution of the energy must be done more accurately. The number of rays sent in a direction is function of a pyramidal region, defined by the center of the shooting patch and a spherical triangle on the surface of a hemisphere surrounding the patch, and the number of patches contained in this region. Thus, the rays shot from a patch have not all the same energy. This method allows us not only to obtain fine details much sooner and with lower cost, but also the overall efficiency is considerably increased. Next we present a new way to calculate the number of rays sent in a region by using a dynamic estimation of the visible patches in this region.
Rights: © University of West Bohemia
Appears in Collections:WSCG '2000: Conference proceeding

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