Khanna, P; Slater, M; Mortensen, J; Yu, I; (2007) A non-parametric guide for radiance sampling in global illumination. In: Banissi, E and Sarfraz, M and Dejdumrong, N, (eds.) COMPUTER GRAPHICS, IMAGING AND VISUALISATION: NEW ADVANCES. (pp. 41 - 48). IEEE COMPUTER SOC
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Global illumination as described by the radiance and potential equations is essentially a sampling problem. This sampling has two elements: 'where' to sample and 'how' to sample. In this paper we propose an alternative method to non-parametrically simplify the problem of 'where' in the general case. We present a solid angle based uniform sampling scheme with an efficient conservative cull of solid angles not affecting the transfer of radiance between two surfaces. This construction also provides a geometric area bounds within which a surface can receive energy from another along directions contained in the solid angle. The technique can be used to illuminate a scene from a general emitter, including incident light fields. The method has several applications and advantages, with results showing good sampling efficiency and speed.
|Title:||A non-parametric guide for radiance sampling in global illumination|
|Event:||Conference on Computer Graphics, Imaging and Visualisation|
|Dates:||2007-08-14 - 2007-08-17|
|UCL classification:||UCL > School of BEAMS > Faculty of Engineering Science > Computer Science|
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