Premium
Precomputed Radiance Transfer Field for Rendering Interreflections in Dynamic Scenes
Author(s) -
Pan Minghao,
Wang Xinguo Liu Rui,
Peng Qunsheng,
Bao Hujun
Publication year - 2007
Publication title -
computer graphics forum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 120
eISSN - 1467-8659
pISSN - 0167-7055
DOI - 10.1111/j.1467-8659.2007.01071.x
Subject(s) - radiance , rendering (computer graphics) , computer science , global illumination , computation , computer graphics (images) , light field , computer vision , real time rendering , high dynamic range , image based modeling and rendering , artificial intelligence , remote sensing , dynamic range , algorithm , geography
In this paper, we introduce a new representation – radiance transfer fields (RTF) – for rendering interreflections in dynamic scenes under low frequency illumination. The RTF describes the radiance transferred by an individual object to its surrounding space as a function of the incident radiance. An important property of RTF is its independence of the scene configuration, enabling interreflection computation in dynamic scenes. Secondly, RTFs naturally fit in with the rendering framework of precomputed shadow fields, incurring negligible cost to add interreflection effects. In addition, RTFs can be used to compute interreflections for both diffuse and glossy objects. We also show that RTF data can be highly compressed by clustered principal component analysis (CPCA), which not only reduces the memory cost but also accelerates rendering. Finally, we present some experimental results demonstrating our techniques.