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Proceedings Paper

Lighting model for natural light in cloudy sky
Author(s): Chun Fan; Takeshi Agui; Hiroshi Nagahashi
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Paper Abstract

A new lighting model for natural light in cloudy sky is proposed. In order to represent cloudy scenes and the distribution of the natural light in the cloudy sky, the sky in the model is expressed by a part of a sphere which is called S surface. A layer, called C layer, is set just under the S surface to deal with the distribution of clouds. The natural light is supposed to be given by finite point light sources on the S surface, and three kinds of light components--direct light, scattering light and ambient light are used in each point light source to represent the natural light in various weather conditions. The spectrum in the model varies with the sun altitude.

Paper Details

Date Published: 22 March 1996
PDF: 6 pages
Proc. SPIE 2644, Fourth International Conference on Computer-Aided Design and Computer Graphics, (22 March 1996); doi: 10.1117/12.235505
Show Author Affiliations
Chun Fan, Tokyo Institute of Technology (Japan)
Takeshi Agui, Tokyo Institute of Technology (Japan)
Hiroshi Nagahashi, Tokyo Institute of Technology (Japan)


Published in SPIE Proceedings Vol. 2644:
Fourth International Conference on Computer-Aided Design and Computer Graphics
Shuzi Yang; Ji Zhou; Cheng-Gang Li, Editor(s)

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