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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea


  • Vol. 15, Iss. 1 — Mar. 1, 2011
  • pp: 30–37

Precision Evaluation of Three-dimensional Feature Points Measurement by Binocular Vision

Guan Xu, Xiaotao Li, Jian Su, Hongda Pan, and Guangdong Tian  »View Author Affiliations

Journal of the Optical Society of Korea, Vol. 15, Issue 1, pp. 30-37 (2011)

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Binocular-pair images obtained from two cameras can be used to calculate the three-dimensional (3D) world coordinate of a feature point. However, to apply this method, measurement accuracy of binocular vision depends on some structure factors. This paper presents an experimental study of measurement distance, baseline distance, and baseline direction. Their effects on camera reconstruction accuracy are investigated. The testing set for the binocular model consists of a series of feature points in stereo-pair images and corresponding 3D world coordinates. This paper discusses a method to increase the baseline distance of two cameras for enhancing the accuracy of a binocular vision system. Moreover, there is an inflexion point of the value and distribution of measurement errors when the baseline distance is increased. The accuracy benefit from increasing the baseline distance is not obvious, since the baseline distance exceeds 1000 mm in this experiment. Furthermore, it is observed that the direction errors deduced from the set-up are lower when the main measurement direction is similar to the baseline direction.

© 2011 Optical Society of Korea

OCIS Codes
(100.6890) Image processing : Three-dimensional image processing
(110.0110) Imaging systems : Imaging systems
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology

Original Manuscript: October 22, 2010
Revised Manuscript: December 30, 2010
Manuscript Accepted: January 20, 2011
Published: March 25, 2011

Guan Xu, Xiaotao Li, Jian Su, Hongda Pan, and Guangdong Tian, "Precision Evaluation of Three-dimensional Feature Points Measurement by Binocular Vision," J. Opt. Soc. Korea 15, 30-37 (2011)

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