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Proceedings Paper

Shape from active shadow motion
Author(s): Lei Wang; James J. Clark
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Paper Abstract

We propose an active vision technique for recovering object shape and absolute position information. The algorithm relies on the controlled motion of a point light source and reasonable assumptions on the general shape of the objects. The sequence of shadow images created by the illuminant is used to produce the surface information. In this approach the light source is not at infinity and light rays are not parallel. For the case of objects with `sharp' edges, our approach requires only solving a linear system of equations. We provide a sensitivity analysis as a basis for robust estimation of surface shape and depth values. Simulations and experiments are performed to demonstrate the efficacy of the algorithm.

Paper Details

Date Published: 6 August 1993
PDF: 12 pages
Proc. SPIE 2056, Intelligent Robots and Computer Vision XII: Active Vision and 3D Methods, (6 August 1993); doi: 10.1117/12.150206
Show Author Affiliations
Lei Wang, Harvard Univ. (United States)
James J. Clark, Harvard Univ. (United States)


Published in SPIE Proceedings Vol. 2056:
Intelligent Robots and Computer Vision XII: Active Vision and 3D Methods
David P. Casasent, Editor(s)

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