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Proceedings Paper

Sphereo: Determining Depth Using Two Specular Spheres And A Single Camera
Author(s): Shree K. Nayar
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Paper Abstract

This paper proposes a method for determining the depth of points in a three-dimensional scene. The concept is to use two spheres with highly specular surfaces to obtain two different perspectives of the scene. Both spheres are viewed by a single stationary camera, and each sphere reflects the world around it into the camera. Correspondence between points on the two spheres is established by matching features such as edges and image intensities, as in traditional stereopsis. Depth is recovered from each pair of corresponding points by triangulation. The use of a single fixed camera avoids the undesirable complexities that characterize the stereo calibration procedure. The measurable range of the system is greatly enhanced by the use of specular spheres and is not limited by the field of view of the camera. Experiments were conducted to determine the accuracy in depth measurement and the feasibility of practical implementation. The technique presented in this paper has been named "SPHEREO" as it uses two SPHeres, rather than two cameras, to emulate stEREOpsis.

Paper Details

Date Published: 7 March 1989
PDF: 10 pages
Proc. SPIE 1005, Optics, Illumination, and Image Sensing for Machine Vision III, (7 March 1989); doi: 10.1117/12.949051
Show Author Affiliations
Shree K. Nayar, Carnegie Mellon University (United States)

Published in SPIE Proceedings Vol. 1005:
Optics, Illumination, and Image Sensing for Machine Vision III
Donald J. Svetkoff, Editor(s)

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