摘要
针对Harris算子提取棋盘格角点存在的问题,提出基于单应矩阵的黑白棋盘格角点提取方法。方法首先通过人机交互确定角点提取范围以及计算单应矩阵;然后根据单应矩阵将物方平面上其他点映射到影像上以确定初始的角点位置;最后以初始点位为基准,根据最小距离法确定最终Harris算子角点提取结果。实验结果表明,文中提出算法能有效提取黑白棋盘格角点。
Aiming at the problem of chessboard＇s corner detection by Harris operator,it proposes one new algorithm of chessboard＇s corner detection based on homography matrix.Firstly,this algorithm determines the range of the corner extraction and computes homography matrix by interactive.Secondly,it projects other points from the object plane to the image plane according to the homography matrix for the purpose of determining the initial corner position.Finally,taking the initial point as the reference,the algorithm determines the final Harris operator corner extraction results by the minimum distance method.The experimental results show that,the proposed algorithm can effectively extract chessboard＇s corners.
出处
《测绘工程》
CSCD
2014年第8期36-39,共4页
Engineering of Surveying and Mapping
关键词
HARRIS算子
棋盘格角点
单应矩阵
最小距离
Harris operator
chessboard＇s corners
homography matrix
minimum distance method
