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	Baumgart  [Baumgart  1973,   Baumgart  1974A  &   1974B]  has
developed  an alternate system for  descriptive computer vision based
on polyhderal  modeling  and  image  contouring.  Baumgart's  overall
design  idea may  be characterized  as an  inverse computer  graphics
approach  to  computer vision.  In  computer graphics,  the  world is
represented in sufficient  detail so that  the image forming  process
can be numerically simulated to generate synthetic television images;
in the inverse, perceived television pictures are anlaysed to compute
detailed geometric  models.   To  date,   polyhedra (such  as in  the
figure)   have  been  automatically  generated   by  intersection  of
silhouette cones from four views of a white plastic horse on  a black
turntable. The viewing conditions are necessarily favorably arranged,
but then the claimed results are honest.

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[Baumgart 1973] Bruce G. Baumgart, "Image Contouring and Comparing",
Stanford Artificial Intelligence Laboratory, Memo AIM-199, October 1973.

[Baumgart 1974A] Bruce G. Baumgart, "GEOMED - A Geometric Editor",
Stanford Artificial Intelligence Laboratory, Memo AIM-232, May 1974.

[Baumgart 1974B] Bruce G. Baumgart, "Geometric Modeling for Computer Vision",
Stanford Artificial Intelligence Laboratory, Memo AIM-249, October 1974.