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3D Reconstruction by Shadow Carving: Theory and Practical Evaluation

Summary: 3D Reconstruction by Shadow Carving: Theory
and Practical Evaluation
Silvio Savarese Marco Andreetto Holly Rushmeier
Fausto Bernardini Pietro Perona
IBM T. J. Watson Research Center
P.O. Box 704, Yorktown Heights, NY 10598
California Institute of Technology
Mail stop 136-93, Pasadena, CA 91125
November 30, 2005
Cast shadows are an informative cue to the shape of objects. They are partic-
ularly valuable for discovering object's concavities which are not available from
other cues such as occluding boundaries. We propose a new method for recovering
shape from shadows which we call shadow carving. Given a conservative estimate
of the volume occupied by an object, it is possible to identify and carve away re-
gions of this volume that are inconsistent with the observed pattern of shadows.
We prove a theorem that guarantees that when these regions are carved away from


Source: Abu-Mostafa, Yaser S. - Department of Mechanical Engineering & Computer Science Department, California Institute of Technology


Collections: Computer Technologies and Information Sciences