摘要
本文简述了机载LiDAR系统相机检校的基本原理,分析了影响相机检校精度的因素,并在此基础上利用实验数据对相机检校精度和正射影像精度之间的关系进行分析讨论。实验结果表明两者之间不是简单的线性关系,相机检校随着自身精度的高低对正射影像精度的提高有不同的影响,当空三解算外方位元素时的中误差从0.6522降到0.4851的过程中,正射影像精度提高较快;当空三解算中误差降低到0.4851时,正射影像的精度较难通过提高相机检校精度来提高。
This paper briefly described the basic principle of airborne liDAR system camera calibration, analyzed the impact fac- tors of camera calibration precision, and discussed the relationship between camera calibration precision and ortho image precision on the basis of experimental data. The experiment showed it is not a simple linear relationship, and the camera calibration plays a different role in ortho image precision with its own precision. In this experiment, when the mean square error of analytical aerotriangulation, whose aim is to calculate the exterior orientation dements, was decreased from 0. 6522 to 0. 4851, the ortho image precision was in- creased faster. What＇ s more, when the mean square error was down to 0. 4851, the ortho image precision could hardly be improved by the camera calibration.
出处
《测绘科学》
CSCD
北大核心
2013年第5期103-104,125,共3页
Science of Surveying and Mapping
