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Accurate Direct Illumination Using Iterative Adaptive Sampling
May/June 2006 (vol. 12 no. 3)
pp. 353-364
ASCII Text
x 
 
Michael Donikian, Bruce Walter, Kavita Bala, Sebastian Fernandez, Donald P. Greenberg, "Accurate Direct Illumination Using Iterative Adaptive Sampling," IEEE Transactions on Visualization and Computer Graphics, vol. 12, no. 3, pp. 353-364, May/June, 2006.
 
 
BibTex
x
 
@article{ 10.1109/TVCG.2006.41,
author = {Michael Donikian and Bruce Walter and Kavita Bala and Sebastian Fernandez and Donald P. Greenberg},
title = {Accurate Direct Illumination Using Iterative Adaptive Sampling},
journal ={IEEE Transactions on Visualization and Computer Graphics},
volume = {12},
number = {3},
issn = {1077-2626},
year = {2006},
pages = {353-364},
doi = {http://doi.ieeecomputersociety.org/10.1109/TVCG.2006.41},
publisher = {IEEE Computer Society},
address = {Los Alamitos, CA, USA},
}
 
 
RefWorks Procite/RefMan/Endnote
x 
 
TY - JOUR
JO - IEEE Transactions on Visualization and Computer Graphics
TI - Accurate Direct Illumination Using Iterative Adaptive Sampling
IS - 3
SN - 1077-2626
SP353
EP364
EPD - 353-364
A1 - Michael Donikian,
A1 - Bruce Walter,
A1 - Kavita Bala,
A1 - Sebastian Fernandez,
A1 - Donald P. Greenberg,
PY - 2006
KW - Raytracing
KW - Monte Carlo
KW - shadowing.
VL - 12
JA - IEEE Transactions on Visualization and Computer Graphics
ER -
 

Abstract—This paper introduces a new multipass algorithm for efficiently computing direct illumination in scenes with many lights and complex occlusion. Images are first divided into 8\times 8 pixel blocks and for each point to be shaded within a block, a probability density function (PDF) is constructed over the lights and sampled to estimate illumination using a small number of shadow rays. Information from these samples is then aggregated at both the pixel and block level and used to optimize the PDFs for the next pass. Over multiple passes the PDFs and pixel estimates are updated until convergence. Using aggregation and feedback progressively improves the sampling and automatically exploits both visibility and spatial coherence. We also use novel extensions for efficient antialiasing. Our adaptive multipass approach computes accurate direct illumination eight times faster than prior approaches in tests on several complex scenes.

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Index Terms:
Raytracing, Monte Carlo, shadowing.
Citation:
Michael Donikian, Bruce Walter, Kavita Bala, Sebastian Fernandez, Donald P. Greenberg, "Accurate Direct Illumination Using Iterative Adaptive Sampling," IEEE Transactions on Visualization and Computer Graphics, vol. 12, no. 3, pp. 353-364, May-June 2006, doi:10.1109/TVCG.2006.41
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