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
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 UCL > School of BEAMS > Faculty of Engineering Science |
| URI: | http://discovery.ucl.ac.uk/id/eprint/80011 |
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