Information
- Publication Type: Conference Paper
- Workgroup(s)/Project(s):
- Date: January 2007
- Booktitle: WSCG
- Date (from): 29. January 2007
- Date (to): 1. February 2007
- Editor: Vaclav Skala
- ISBN: 978-80-86943-02-2
- Lecturer: Georg Zotti
- Location: Plzen
- Pages (from): 23
- Pages (to): 30
- Publisher: University of West Bohemia
- Keywords: Verification, Skylight
Abstract
The Preetham skylight model is currently one of the most widely used
analytic models of skylight luminance in computer graphics.
Despite its widespread use, very little work has been carried out to verify the results generated by the model, both in terms of the luminance patterns it generates, and in terms of numerical reliability and stability.
We have implemented the model in Mathematica, visualise and discuss those parameter ranges which exhibit problematic behaviour, and compare the computed luminance values with references from literature, especially the 15 standard skylight distributions of the CIE 2003 Standard General Sky.
We also performed luminance measurements on real cloudless skies, and compare these measurements to the predictions of the model.
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BibTeX
@inproceedings{zotti-2007-wscg,
title = "A Critical Review of the Preetham Skylight Model",
author = "Georg Zotti and Alexander Wilkie and Werner Purgathofer",
year = "2007",
abstract = "The Preetham skylight model is currently one of the most
widely used analytic models of skylight luminance in
computer graphics. Despite its widespread use, very little
work has been carried out to verify the results generated by
the model, both in terms of the luminance patterns it
generates, and in terms of numerical reliability and
stability. We have implemented the model in Mathematica,
visualise and discuss those parameter ranges which exhibit
problematic behaviour, and compare the computed luminance
values with references from literature, especially the 15
standard skylight distributions of the CIE 2003 Standard
General Sky. We also performed luminance measurements on
real cloudless skies, and compare these measurements to the
predictions of the model.",
month = jan,
booktitle = "WSCG ",
editor = "Vaclav Skala",
isbn = "978-80-86943-02-2",
location = "Plzen",
publisher = "University of West Bohemia",
pages = "23--30",
keywords = "Verification, Skylight",
URL = "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-wscg/",
}