Nearest Neighbour Corner Points Matching Detection Algorithm
1 College of Electrical and Information Engineering, Hunan University, Changsha, Hunan, China
2 Hunan Keyshare Information Technology Co., Ltd, Changsha, Hunan, China
Accurate detection towards the corners plays an important part in camera calibration. To deal with the instability and inaccuracies of present corner detection algorithm, the nearest neighbour corners match-ing detection algorithms was brought forward. First, it dilates the binary image of the photographed pictures, searches and reserves quadrilateral outline of the image. Second, the blocks which accord with chess-board-corners are classified into a class. If too many blocks in class, it will be deleted; if not, it will be added, and then let the midpoint of the two vertex coordinates be the rough position of corner. At last, it precisely locates the position of the corners. The Experimental results have shown that the algorithm has obvious advantages on accuracy and validity in corner detection, and it can give security for camera calibration in traffic accident measurement.
Key words: nearest neighbour corners / detection algorithms / camera calibration
© Owned by the authors, published by EDP Sciences, 2015
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