基于单应性矩阵的棋盘格角点检测研究

摘要

To satisfy the chessboard＇s comer detection in three-dimension vision measurement, a detection algorithm based on homography was presented. First, the comers＇ bounding quadrangle＇s four comers were selected, then all the comers＇ initial coordinates were obtained through homography map. At last, all the comers were located more accurately utilizing interpolated value, Harris operator, Forstner operator and SVD methods. In calibration board comer detection experiment, this method achieved good detection result.%针对三雏视觉测量中棋盘格标定板的角点检测，给出了基于单应性矩阵这一计算机视觉重要工具为基础的检测方法。首先通过点选得到待测角点外接四边形的4个角点坐标，接着利用单应性矩阵映射得到所有角点的初始位置，最后综合内插值法、Harris算子、Forstner算子、SVD方法等方法对所有角点进一步精确定位。实验表明．该方法对棋盘格角点位置检测效果好，能够满足实际应用要求。