一种新的摄像机线性标定方法

A New Camera Linear Calibration Method

传统摄像机线性标定Faugeras方法具有简单易实现的优点,然而其模型在求解时未考虑摄像机的特性,只当成一般数学问题求解,造成误差较大,特别是求解的图像中心点与实际的图像中心有较大偏差。为此提出一种新的摄像机线性标定方法,把图像中心作为光轴中心点,在认为该参数已知的情况下,可有效避免其他参数产生较大误差。将参数分开求解,分步获得摄像机参数,并对部分参数进行优化。实验结果表明,提出的这种新的线性标定法相较于Faugeras方法有了一定提升,标定精度较高且计算速度较快。

The Faugeras method of the traditional camera linear calibration has the advantages of simple and easy to implement.However,its model does not consider the characteristics of the camera when it is solved. It was only served as a general mathematical solution.In particular,the solved center of the image was deviateed from the actual image center.Therefore,a new linear calibration method of camera was proposed.Taking the center of the image as the center point of the optical axis in the case that this parameter was known,the greater errors of other parameters can be effectively avoided.The parameters were solved separately,obtained step by step,and some were optimized.The experimental results showed that the proposed new linear calibration method has a certain improvement compared with the Faugeras method and the calibration accuracy was high and the calculation speed was fast.