“A shading model for atmospheric scattering considering luminous intensity distribution of light sources” by Nishita, Miyawaki and Nakamae
Conference:
Type(s):
Title:
- A shading model for atmospheric scattering considering luminous intensity distribution of light sources
Presenter(s)/Author(s):
Abstract:
Studio spotlights produce dazzling shafts of light, while light scattered from fog illuminated by automobile headlights renders driving difficult. This is because the particles in the illuminated volume become visible by scattering light. A shading model for scattering and absorption of light caused by particles in the atmosphere is proposed in this paper. The method takes into account luminous intensity distribution of light sources, shadows due to obstacles, and density of particles. The intensity at a viewpoint is calculated by integration of light scattered by particles between the viewpoint and a given point on an object. The regions to be treated in this manner are localized by considering illumination volumes and shadow volumes caused by obstacles in the illumination volumes.
References:
1. Warn, D.J.: Lighting Controls for Synthetic Images, Computer Graphics, Voi. 17, No.3 (1983) pp.13-21.
2. Nishita, T., Okamura,I. and Nakamae,E.: Shading Models for Point and Linear Sources, ACM Trans. on Graphics, Vol.4, No.2 (1986) pp.124-146
3. Nishita, T. and Hakamae, E.: Half-Tone Representation of 3-D Objects Illuminated by Area Sources or Polyhedron Sources, IEEE, Proc. of COMPSAC (1983) pp.237-241.
4. Nishita, T. and Nakamae, E. : Continuous Tone Representation of Three-Dimensional Objects Illuminated by Sky Light, Computer Graphics, Voi,19, No. 3 (1986) pp.23-30.
5. Blinn, J. F.: Light Reflection Functions for Simulation of Clouds and Dusty Surfaces, Computer Graphics, Voi. 16, No.3 (1982) pp.21- 29.
6. KaJiya, J.T. and Von Herzen, B.P.: Ray Tracing Volume Densities, Computer Graphicsj Voi.18, No.S (1984) pp.165-174.
7. Max, ~, L.: Atmospherical Illumination and Shadows, Computer Graphics, Vol.20, No.4 (1986) pp.117-124.
8. IES : IES Lighting Handbook Reference Volume, (1981) p.6-6.
9. Gibbons,M.G.: Radiation Received by Uncollimated Receiver from a 4~ Source, J. Opt. Soe. of America, Vol.~8, No.8 (1958) pp.550-555.
10. Nakamae, E., Harada,K,, Ishizaki,T, Nishita,T.: A Montage; The Overlaying of the Computer Generated Images onto a Background Photograph, Computer Graphics, Vol.20, No.3 (1986) pp.207- 214.
11. Crow, F. : Shadow Algorithms for Computer Graphics, Computer Graphics, Voi.11, No.3 (1977) pp.242-248.
12. Nakamae, E. and Nishita, T. : An Hidden Line Elimination of Polyhedra, Information Processing in Japan, Voi~12 (1972) pp.134- 141.
13. Gardner, Y.G. : Visual Simulation of Clouds, Computer Graphics, Voi.19, No.3 (1985) pp.297-303.