摘要
欲保证基于摄影测量的汽车行驶跑偏在线自动测试系统的测试精度,需对测试用CCD相机进行精确标定。CCD相机标定常用的算法有空间后方交会法和直接线性变换(DLT)法等2种。通过对2种相机标定方法基本原理的分析,结合汽车行驶跑偏在线自动测试系统的特点,从相机标定精度和稳定性出发,探讨了相机标定算法的选用原则及控制点类型对标定精度的影响等问题,并通过试验验证了汽车行驶跑偏测试系统采用三维控制点和DLT标定算法可获得更好的相机标定精度。
An accurate calibration to the CCD measurement camera is needed in order to ensure the high testing precision of automatic on line vehicle driving wandering test system.There are two common methods for CCD camera calibration,namely spatial resection and direct linear transformation（DLT）.By analyzing the basic theories of the two calibration methods and the features of the testing system,the selection rule of the calibration method as well as the influence of control point type on calibration accuracy are studied according to the accuracy and stability of the calibration.After lots of experiments,three dimensional control points and DLT calibration methods are chosen to make a better calibration.
出处
《汽车技术》
北大核心
2011年第8期46-50,共5页
Automobile Technology
关键词
行驶偏移
测试系统
相机标定
控制点
Driving wandering
Test system
Camera calibration
Control points
