Adaptation of Space-Mapping Methods for Object Location Estimation to Camera Setup Changes -- A New Study

  • Authors:

  • Chih-Jen Wu;Wen-Hsiang Tsai

  • Affiliations:

  • Institute of Computer Science and Engineering, National Chiao Tung University, Taiwan;Institute of Computer Science and Engineering, National Chiao Tung University, Taiwan and Department of Information Communication, Asia University, Taiwan

  • Venue:
  • KES '09 Proceedings of the 13th International Conference on Knowledge-Based and Intelligent Information and Engineering Systems: Part II
  • Year:
  • 2009

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Abstract

A new space-mapping method for object location estimation which is adaptive to camera setup changes in various applications is proposed. The location of an object appearing in an image is estimated by mapping image coordinates of object points to corresponding real-world coordinates using a mapping table, which is constructed in two stages, with the first for establishing a basic table using bilinear interpolation and the second for adapting it to changes of camera heights and orientations. Analytic equations for such adaptation are derived based on image formation and camera geometry properties. Good experimental results are shown to prove the feasibility of the proposed method.