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A non-parametric guide for radiance sampling in global illumination

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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Abstract

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.

Type:Proceedings paper
Title:A non-parametric guide for radiance sampling in global illumination
Event:Conference on Computer Graphics, Imaging and Visualisation
Location:Bangkok, THAILAND
Dates:2007-08-14 - 2007-08-17
ISBN-13:978-0-7695-2928-8
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Computer Science

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