In this paper, we investigate camera calibration in soccer field using a field model defined according to FIFA standards. The proposed algorithm searches for homographic transform matrix for best correspondence between world coordinate and image coordinate systems. To find this matrix, some static markers are required in image and field. A good proposal for these markers is the intersections of lines in field and image. These points are transferred to Simulated Annealing algorithm then it searches for the best correspondence between image and field lines. In this work, we have tested several frames of soccer games and have obtained fairly good results.

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