Tomoyuki Nishita
Abstract
The effect of shadows and interreflection created by room obstructions is an important factor in the continuous tone representation of interiors. For indirect illumination, in most cases a uniform ambient light has been considered, even though the interreflection gives very complex effects with the shaded images.The proposed method for indirect lighting with shadows results in the following advanced points:1) The indirect illuminance caused by the surfaces of objects such as ceilings, floors, walls, desks, bookcases etc. gives added realism to images.2) The proposed method is suitable for every type of light source such as point sources, linear sources, and area sources.
- 1 Bui-Tuong,Fhong : Illumination for Computer- Generated Pictures, Comm. ACM, Vol.18, No.6 (1975) pp. 311-317. Google Scholar
Digital Library
- 2 Cook, R.L. and Torrance, K.E.: A Reflectance Model for Computer Graphics, ACM Trans. on Graphics, Vol.l, No.i(1982) pp.7-24. Google ScholarDigital Library
- 3 Blinn, J.F. and Newell, M.E.: Texture and Reflection in Computer Generated Images, Comm. ACM, Vol.19, No. i0(1976) pp~542-546. Google ScholarDigital Library
- 4 Illuminating Engineering Society of North America, IES LIGHTING HANDBOOK Reference Volume (1981).Google Scholar
- 5 Takahashi, Ishino et al. : Computer Method for Predetermining Illuminance in an Interior Lighting Installation, Journal of Illuminating Institute of Japan(Japanese), Voi.54, No.12 (1970) pp.697-707.Google Scholar
- 6 Jensen, P. and Lewin, I. : The Effect of Room Obstructions on the Calculation of Interreflected Components, IES Tech. Conf. Priprint _No. 29(1982).Google Scholar
- 7 Goral, C .M., Torrance ,K. E. , Greenberg,D. P. and Battaile, B. : Modeling the Interaction of Light Between Diffuse Surfaces, Computer Graphics, Vol.18,No.3(1984 ) pp.213-222. Google ScholarDigital Library
- 8 Nishita, T., Okamura,I. and Nakamae,E.: Shading Models for Point and Linear Sources, submitted for publication(TOG) (1983). Google ScholarDigital Library
- 9 Nishita, T. and Nakamae, E. : Half-Tone Representation of 3-D Objects Illuminated by Area Sources or Polyhedron Sources, Proceedings of The IEEE Computer Society' s International Computer Software and Applications Conference (COMPSAC) (1983) pp. 237-241.Google Scholar
- 10 Nishita, T. and Nakamae,E. : An Algorithm for Half-tone Representation of Three-Dimensional Objects, Information Processing in Japan, Vol.14 (1974) pp.93-99.Google Scholar
- 11 Nishiata, T. and Nakamae,E. : Half-Tone Representation of 3-D Objects with Smooth Edges by Using a Multi-Scanning Method,Transactions of Information Processing Society of Japan (Japanese), Vol. 25, No.5(1984) pp.703-Tll.Google Scholar
- 12 Crow, F.C. : Shadow Algorithms for Computer Graphics, Computer Graphics, Vol.ll, No.2(1977) pp. 242-247. Google ScholarDigital Library
Index Terms
- Continuous tone representation of three-dimensional objects taking account of shadows and interreflection
Recommendations
Modeling the interaction of light between diffuse surfaces
A method is described which models the interaction of light between diffusely reflecting surfaces. Current light reflection models used in computer graphics do not account for the object-to-object reflection between diffuse surfaces, and thus ...
Continuous tone representation of three-dimensional objects taking account of shadows and interreflection
SIGGRAPH '85: Proceedings of the 12th annual conference on Computer graphics and interactive techniquesThe effect of shadows and interreflection created by room obstructions is an important factor in the continuous tone representation of interiors. For indirect illumination, in most cases a uniform ambient light has been considered, even though the ...
Continuous tone representation of three-dimensional objects illuminated by sky light
SIGGRAPH '86: Proceedings of the 13th annual conference on Computer graphics and interactive techniquesNatural lighting models to date have been limited to calculation of direct sunlight. However, this paper proposes an improved model for natural lighting calculations that adequately considers both direct sunlight and scattered light caused by clouds and ...
Comments