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Calibrating a Structured Light Stripe System: A Novel Approach

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Abstract

The problem associated with calibrating a structured light stripe system is that known world points on the calibration target do not normally fall onto every light stripe plane illuminated from the projector. We present in this paper a novel calibration method that employs the invariance of the cross ratio to overcome this problem. Using 4 known non-coplanar sets of 3 collinear world points and with no prior knowledge of the perspective projection matrix of the camera, we show that world points lying on each light stripe plane can be computed. Furthermore, by incorporating the homography between the light stripe and image planes, the 4 × 3 image-to-world transformation matrix for each stripe plane can also be recovered. The experiments conducted suggest that this novel calibration method is robust, economical, and is applicable to many dense shape reconstruction tasks.

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Authors and Affiliations

  1. School of Information Technology, Murdoch University, Perth WA, 6150, Australia

    D.Q. Huynh

  2. The University of Western Australia, Perth, WA, 6907, Australia

    R.A. Owens

  3. Department of Biochemistry, The University of Western Australia, Perth, WA, 6907, Australia

    P.E. Hartmann

Authors
  1. D.Q. Huynh
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  2. R.A. Owens
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  3. P.E. Hartmann
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Huynh, D., Owens, R. & Hartmann, P. Calibrating a Structured Light Stripe System: A Novel Approach. International Journal of Computer Vision 33, 73–86 (1999). https://doi.org/10.1023/A:1008117315311

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  • DOI: https://doi.org/10.1023/A:1008117315311

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