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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...
Sub-pixel detection of target points is the performance bottleneck in camera calibration. Traditional algorithms are computational expensive or low precision when we do camera calibration in sport video analysis. In this paper, we propose a new algorithm to detect the grid-like target (i.e. tennis court in TV broadcasting). It has 3 parts: (1) color histogram based interested point classifier making...
In this work, we propose a framework to build a billiards tutoring system based on broadcasting nine-ball video analysis. A robust table detection module is developed by mapping the displayed video frames to a predefined billiard table model. In addition, we detect balls and trace their positions at every time instant. The real-world spatial relationships between the table and the balls are used to...
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