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Stereo and Specular Reflection

Published: 01 February 1998 Publication History

Abstract

The problem of accurate depth estimation using stereo in the presence of specular reflection is addressed. Specular reflection, a fundamental and ubiquitous reflection mechanism, is viewpoint dependent and can cause large intensity differences at corresponding points, resulting in significant depth errors. We analyze the physics of specular reflection and the geometry of stereopsis which lead to a relationship between stereo vergence, surface roughness, and the likelihood of a correct match. Given a lower bound on surface roughness, an optimal binocular stereo configuration can be determined which maximizes precision in depth estimation despite specular reflection. However, surface roughness is difficult to estimate in unstructured environments. Therefore, trinocular configurations, independent of surface roughness are determined such that at each scene point visible to all sensors, at least one stereo pair can produce correct depth. We have developed a simple algorithm to reconstruct depth from the multiple stereo pairs.

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Published In

cover image International Journal of Computer Vision
International Journal of Computer Vision  Volume 26, Issue 2
Feb. 1998
72 pages
ISSN:0920-5691
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Kluwer Academic Publishers

United States

Publication History

Published: 01 February 1998

Author Tags

  1. correspondence
  2. depth estimation
  3. image matching
  4. specular reflection
  5. stereo

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