一种基于两次Radon变换检测棋盘方格点的新算法

提出了一种新的方格角点检测算法。通过连续两次Radon变换，找出角点所在的直线位置，再利用线性拟合方法对得到的直线进行校正，最后线性求解出角点的坐标。该方法最大的特点是能够自动地在正确区域找出所求方格角点，而无需人机交互，这对于动态校准的研究具有重要的意义。通过实际的应用，验证了该方法的正确性和可靠性。

A New Algorithm for Chessboard Grid Corners Detection Based on Two Successive Radon Transform

A novel method for grid corner detection is proposed. Two successive radon transform is adopted to find the lines grid comers lie on. Then linear fit technique is used to rectify these lines. Finally grid comers are acquired by solving the algebraic equations. The most attractive point of the method is that the region of the grid comers can be automatically detected. Thus the technique through interactive mode to select corners is not necessary, which is important to the study of dynamic calibration. It is proved, through the actual application, that the method presented in this paper is correct and reliable.