標題: All-frequency precomputed radiance transfer using spherical radial basis functions and clustered tensor approximation
作者: Tsai, Yu-Ting
Shih, Zen-Chung
資訊工程學系
Department of Computer Science
關鍵字: real-time rendering;illumination;precomputed radiance transfer;spherical radial basis functions;tensor approximation;non-linear optimization
公開日期: 1-七月-2006
摘要: This paper introduces a new data representation and compression technique for precomputed radiance transfer (PRT). The light transfer functions and light sources are modeled with spherical radial basis functions (SRBFs). A SRBF is a rotation-invariant function that depends on the geodesic distance between two points on the unit sphere. Rotating functions in SRBF representation is as straightforward as rotating the centers of SRBFs. Moreover, high-frequency signals are handled by adjusting the bandwidth parameters of SRBFs. To exploit inter-vertex coherence, the light transfer functions are further classified iteratively into disjoint clusters, and tensor approximation is applied within each cluster. Compared with previous methods, the proposed approach enables real-time rendering with comparable quality under high-frequency lighting environments. The data storage is also more compact than previous all-frequency PRT algorithms.
URI: http://dx.doi.org/10.1145/1141911.1141981
http://hdl.handle.net/11536/12079
ISSN: 0730-0301
DOI: 10.1145/1141911.1141981
期刊: ACM TRANSACTIONS ON GRAPHICS
Volume: 25
Issue: 3
起始頁: 967
結束頁: 976
顯示於類別:期刊論文


文件中的檔案:

  1. 000239817400058.pdf