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1. C=2 (shape from silhouettes)
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Volume
intersection [Baumgart 1974]
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For
more info: Rapid octree construction from image sequences.
R. Szeliski,
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CVGIP:
Image Understanding, 58(1):23-32, July 1993. (this paper is apparently
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not
available online) or
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W.
Matusik, C. Buehler, R. Raskar, L. McMillan, and S. J. Gortler, Image-Based
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Visual
Hulls, SIGGRAPH 2000 ( pdf 1.6 MB )
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2. C unconstrained, viewpoint constraints
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Voxel
coloring algorithm [Seitz & Dyer 97]
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3. General Case
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Space
carving [Kutulakos & Seitz 98]
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