相机标定误差因素分析

分析了影响相机标定精度的一些主要因素,并给出了在这些因素影响下世界坐标重投影误差的分布曲线.仿真及实验表明在非线性相机模型的线性标定方法中,世界坐标的测量精度对相机标定精度有较大影响,标定图片数量15-20幅较合适.对相机标定中合理制作标定板、选择标定图片数量、快速高精度标定相机提供了有益帮助.

Analysis of Factors on the Error of the Camera Calibration

In order to improve the accuracy of camera calibration,the factors that influence it must be considered.Some main factors are analysed comprehensively.The curves of the distribution of the error of the feature points’ restructure of these factors are obtained.Computer simulation and real data experiments demonstrate that in the linear calibration method of nonlinear camera model,the precision of the feature points’ coordinates influence the calibration accuracy to a great extent;The appropriate calibrated image number is between 15 and 20.The research may provide reference for model planes making,calibrated image number determination and efficient camera calibrating.