An Analytical Model for Skylight Polarisation

Information

• Publication Type: Conference Paper
• Workgroup(s)/Project(s):
  • Skydome
• Date: June 2004
• ISBN: 3-905673-12-6
• Publisher: ?
• Lecturer: Alexander Wilkie
• Editor: Alexander Keller and Henrik Wann Jensen
• Booktitle: Proceedings of the Eurographics Symposium on Rendering
• Pages: 387 – 399
• Keywords: skylight rendering, polarisation

Abstract

Under certain circumstances the polarisation state of the illumination can have a significant influence on the appearance of scenes; outdoor scenes with specular surfaces -- such as water bodies or windows -- under clear, blue skies are good examples of such environments. In cases like that it can be essential to use a polarising renderer if a true prediction of nature is intended, but so far no polarising skylight models have been presented. This paper presents a plausible analytical model for the polarisation of the light emitted from a clear sky. Our approach is based on a suitable combination of several components with well-known characteristics, and yields acceptable results in considerably less time than an exhaustive simulation of the underlying atmospheric scattering phenomena would require.

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BibTeX

@inproceedings{Wilkie-2004-AMS,
  title =      "An Analytical Model for Skylight Polarisation",
  author =     "Alexander Wilkie and Robert F. Tobler and Christiane
               Ulbricht and Georg Zotti and Werner Purgathofer",
  year =       "2004",
  abstract =   "Under certain circumstances the polarisation state of the
               illumination can have a significant influence on the
               appearance of scenes; outdoor scenes with specular surfaces
               -- such as water bodies or windows -- under clear, blue
               skies are good examples of such environments. In cases like
               that it can be essential to use a polarising renderer if a
               true prediction of nature is intended, but so far no
               polarising skylight models have been presented.    This
               paper presents a plausible analytical model for the
               polarisation of the light emitted from a clear sky. Our
               approach is based on a suitable combination of several
               components with well-known characteristics, and yields
               acceptable results in considerably less time than an
               exhaustive simulation of the underlying atmospheric
               scattering phenomena would require.",
  month =      jun,
  isbn =       "3-905673-12-6",
  publisher =  "?",
  editor =     "Alexander Keller and Henrik Wann Jensen ",
  booktitle =  "Proceedings of the Eurographics Symposium on Rendering",
  pages =      "387--399",
  keywords =   "skylight rendering, polarisation",
  URL =        "https://www.cg.tuwien.ac.at/research/publications/2004/Wilkie-2004-AMS/",
}