基于交比不变性的摄像机标定方法  

Method for camera calibration based on cross-ratio invariability

作　　者：李进明[1,2] 林意 

机构地区：[1]江南大学数字与媒体学院,江苏无锡214122 [2]江南大学信息工程学院,江苏无锡214122

出　　处：《计算机工程与设计》2011年第3期1126-1129,共4页Computer Engineering and Design

摘　　要：针对传统棋盘格模板制作过程复杂、精度要求高的问题,提出了一种动态的基于交比不变性的摄像机标定方法。对两幅同源图像中的直线信息进行提取,运用顶点交比序列的唯一性来完成两图像中直线的匹配,从而准确实现了点与点的动态标定。实验结果表明,该方法鲁棒性较好,在自然环境下,对于标定固定位置的摄像机也能运用,表现出了良好的效果,具有广泛的应用性。Aimed at the problems of the complicated process of fabrication and high-precision for X-corner template,a dynamic method based on the principle of cross-ratio invariance for camera calibration is proposed.Firstly,line feature in two homologous images are picked up,then the uniqueness of the sequence of vertical cross-ratio is used to match two images straight to accurately achieve dynamic calibration for point-to-point.Experimental results show that the method has better robustness,this method is fit for calibrating fixed camera in natural environment and as well display positive effects.So it has a wide range of application.

关 键 词：棋盘格模板 交比不变性 摄像机标定 顶点交比序列 动态标定 鲁棒性 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]