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Geometrical approach for rectification of single-lens stereovision system with a triprism

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Abstract

This paper proposes a new method for rectification of single-lens stereovision system with a triprism. The image plane of this camera will capture three different views of the same scene behind the filter in one shot. These three sub-images can be taken as the images captured by three virtual cameras which are generated by the three Face (3F) filter (triprism). A geometry-based method is proposed to determine the pose of virtual cameras and obtain the rotational and translational transformation matrix to real camera. At the same time, the parallelogram rule and refraction rule are employed to determine the desired sketch ray functions. Followed by this, the rectification transformation matrix which applied on the images captured using the system is computed. The approach based on geometry analysis of ray sketching is significantly a simpler implementation: it does not require the usual complicated calibration process. Experimental results are presented to show the effectiveness of the approach.

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Acknowledgments

The authors would like to thank Dr. Yong Xiao for providing the original Single-lens stereovision system.

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Authors and Affiliations

  1. Department of Mechanical Engineering, National University of Singapore, EA #04-06, Singapore, 117576, Singapore

    Daolei Wang, Kah Bin Lim & Wei Loon Kee

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  1. Daolei Wang
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  2. Kah Bin Lim
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  3. Wei Loon Kee
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Correspondence to Daolei Wang.

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Wang, D., Lim, K.B. & Kee, W.L. Geometrical approach for rectification of single-lens stereovision system with a triprism. Machine Vision and Applications 24, 821–833 (2013). https://doi.org/10.1007/s00138-012-0467-8

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  • DOI: https://doi.org/10.1007/s00138-012-0467-8

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