基于交比不变性的摄像机标定方法

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, adynamic 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.