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SIGGRAPH
1994
ACM

A framework for the analysis of error in global illumination algorithms

10 years 3 days ago
A framework for the analysis of error in global illumination algorithms
In this paper we identify sources of error in global illumination algorithms and derive bounds for each distinct category. Errors arise from three sources: inaccuracies in the boundary data, discretization, and computation. Boundary data consist of surface geometry, reflectance functions, and emission functions, all of which may be perturbed by errors in measurement or simulation, or by simplifications made for computational efficiency. Discretization error is introduced by replacing the continuous radiative transfer equation with a finite-dimensional linear system, usually by means of boundary elements and a corresponding projection method. Finally, computational errors perturb the finite-dimensional linear system through imprecise form factors, inner products, visibility, etc., as well as by halting iterative solvers after a finite number of steps. Using the error taxonomy introduced in the paper we examine existing global illumination algorithms and suggest new avenues of research....
James Arvo, Kenneth E. Torrance, Brian E. Smits
Added 10 Aug 2010
Updated 10 Aug 2010
Type Conference
Year 1994
Where SIGGRAPH
Authors James Arvo, Kenneth E. Torrance, Brian E. Smits
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