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Compositing 3D images with antialiasing and various shading effects
March/April 1989 (vol. 9 no. 2)
pp. 21,22,23,24,25,26,27,28,29
A method is proposed for compositing 3-D images produced by different programs, taking depth order into consideration. The method can add the following effects to composited images: antialiased images with scaling are displayed by a simple algorithm; the algorithm can add shading effects due to various types of light, such as area sources and skylight; and ray tracing can be performed in localized regions, producing realistic results without the computational expense of ray tracing the whole image. In addition to the above processes, such shading effects as fog and texture mapping can be processed with conventional methods. Thus, it becomes possible to display complex scenes with various shading effects, using relatively small computers. The multiscanning method used for antialiasing and a data structure for processing it are described. Examples are presented to demonstrate the capability of the system.<>

1. T. Whitted and D.M. Weimer, "A Software Test-Bed for the Development of 3D Raster Graphics Systems,"Computer Graphics(Proc. SIGGRAPH), Vol. 15, No. 3, Aug. 1981, pp. 271-277.
2. F.C. Crow, "A More Flexible Image Generation Environment,"Computer Graphics(Proc. SIGGRAPH), Vol. 16, No. 3, July 1982, pp. 9-18.
3. T. Porter and T. Duff, "Compositing Digital Images,"Computer Graphics(Proc. Siggraph), Vol. 18, No. 3, July 1984, pp. 253-259.
4. T. Duff, "Compositing 3-D Rendered Images,"Computer Graphics(Proc. SIGGRAPH), July 1985, pp. 41-44.
5. K. Perlin, "An Image Synthesizer,"Computer Graphics(Proc. Siggraph), Vol. 19, No 3, July 1985, pp. 287-296.
6. E. Catmull, "A Hidden-Surface Algorithm with Antialiasing,"Computer Graphics(Proc. SIGGRAPH), Vol. 12, No. 3, Aug. 1978, pp. 6-11.
7. T. Nishita and E. Nakamae, "Half-Tone Representation of 3D Objects with Smooth Edge by Using a Multi-Scanning Method,"J. Information Processing(in Japanese), Vol. 25, No. 5, Sept. 1984, pp. 703-711.
8. F.C. Crow, "A Comparison of Antialiasing Techniques,"CG&A, Vol. 1, No. 1, Jan. 1981, pp. 40-48.
9. T. Nishita, T. Okamura, and E. Nakamae, "Shading Models for Point and Linear Sources,"ACM Trans. Graphics, Vol. 4, No. 2, Apr. 1985, pp. 124-146.
10. T. Nishita and E. Nakamae, "Half-Tone Representation of 3D Objects Illuminated by Area Sources or Polyhedron Sources,"IEEE Proc. COMPSAC 83, (microfiche only), CS Press, Los Alamitos, Calif., 1983, pp. 237-242.
11. T. Nishita and E. Nakamae, "Continuous Tone Representation of Three-Dimensional Objects Illuminated by Skylight,"Computer Graphics(Proc. SIGGRAPH), Vol. 20, No. 4, Aug. 1986, pp. 125-132.
12. L. Williams, "Casting Curved Shadows on Curved Surfaces,"Computer Graphics(Proc. SIGGRAPH), Vol. 12, No. 3, Aug. 1978, pp. 270-274.
13. H. Weghorst, G. Hooper, and D.P. Greenberg, "Improved Computational Methods for Ray Tracing,"ACM Trans. Graphics, Jan. 1984, pp. 52-69.
14. E. Nakamae, K. Tadamura, and T. Nishita, "Half-Tone Representation Using Local Ray Tracing,"J. Information Processing(in Japanese), Vol. 27, No. 11, Nov. 1986, pp. 1077-1085.
15. R. Cook, "Shade Trees,"Computer Graphics(Proc. SIGGRAPH), Vol. 18, No. 3, July 1984, pp. 223-231.

Index Terms:
data structures,computer graphics,data structure,computer graphics,3D images,depth order,composited images,antialiased images,shading effects,ray tracing,fog,texture mapping,multiscanning method,Displays,Light sources,Pixel,Buffer storage,Rendering (computer graphics),Solid modeling,Surface texture,Optical refraction,Shape,Ray tracing
Citation:
"Compositing 3D images with antialiasing and various shading effects," IEEE Computer Graphics and Applications, vol. 9, no. 2, pp. 21,22,23,24,25,26,27,28,29, March-April 1989, doi:10.1109/38.19048
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