Radiosity in Flatland
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Date
1992
Authors
Journal Title
Journal ISSN
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Publisher
Blackwell Science Ltd and the Eurographics Association
Abstract
The radiosity method for the simulation of interreflection of light between diffuse surfaces is such a common image synthesis technique that its derivation is worthy of study. We here examine the radiosity method in a two dimensional, flatland world. It is shown that the radiosity method is a simple finite element method for the solution of the integral equation governing global illumination. These two-dimensional studies help explain the radiosity method in general and suggest a number of improvements to existing algorithms. In particular, radiosity solutions can be improved using a priori discontinuity meshing, placing mesh boundaries on discontinuities such as shadow edges. When discontinuity meshing is used along with piecewise-linear approximations instead of the current piecewise-constant approximations, the accuracy of radiosity simulations can be greatly increased.
Description
@article{10.1111:1467-8659.1130181,
journal = {Computer Graphics Forum},
title = {{Radiosity in Flatland}},
author = {Heckhert, Paul S.},
year = {1992},
publisher = {Blackwell Science Ltd and the Eurographics Association},
ISSN = {1467-8659},
DOI = {10.1111/1467-8659.1130181}
}