Parameter Estimation for Range Finding Algorithm of Equidistance Stereo Catadioptric Mirrors


Young-Ho Choi, Min-Goo Kang, Moon-Shin Zo, Journal of Information Processing Systems Vol. 8, No. 5, pp. 117-124, Oct. 2007  


Keywords: Equidistance catadioptric mirror, range finding algorithm, stereo images
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Abstract

Catadioptric mirrors are widely used in automatic surveillance system. The major drawback of catadioptric mirror is its unequal image resolution. Equidistance catadioptric mirrir can be the solution to this problem. The exact axial alignment and the exact mount of mirror are the sources that can be avoided but the focal length variation is inevitable. In this paper, the effects of focal length variation on the computation of depth and height of object' point are explained and the effective and simple focal length finding algorithm is presented. First two object's points are selected, and the counterparts on the other stereo image are to be found using MSE criterion. Using four pixel distance from the image center, the assumed focal length is calculated. If the obtained focal length is different from the exact focal length, 24mm, the focal length value is modified by the proposed method. The method is very simple and gives the comparable results with the earlier sophisticated method.


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Cite this article
[APA Style]
Choi, Y., Kang, M., & Zo, M. (2007). Parameter Estimation for Range Finding Algorithm of Equidistance Stereo Catadioptric Mirrors. Journal of Internet Computing and Services, 8(5), 117-124.

[IEEE Style]
Y. Choi, M. Kang, M. Zo, "Parameter Estimation for Range Finding Algorithm of Equidistance Stereo Catadioptric Mirrors," Journal of Internet Computing and Services, vol. 8, no. 5, pp. 117-124, 2007.

[ACM Style]
Young-Ho Choi, Min-Goo Kang, and Moon-Shin Zo. 2007. Parameter Estimation for Range Finding Algorithm of Equidistance Stereo Catadioptric Mirrors. Journal of Internet Computing and Services, 8, 5, (2007), 117-124.