摘要
航空摄影测量以及无人机摄影等高空摄影作业对CCD相机的各种几何光学参数有很高的要求,参数的一个毫米或者一个像元的误差往往会导致地面数米甚至数十米的误差,因此相机参数的高精度检校是航空摄影测量数据几何处理的关键步骤。使用直接线性变换(DLT)、单片空间后方交会以及多片空间后方交会的方法对成像仪进行检校,并进行比较分析得出多片空间后方交会优于单片空间后方交会的结论,利用像点坐标差和多片空间前方交会的方法进一步验证了多片空间后方交会检校结果的可靠性和精确性。
High altitude photographic work such as aerial photogrammetry and UAV photography has very high demands on geometric optical parameters of the CCD camera. As one millimeter or one pixel error of geometric optical parameter tends to cause the error of a few meters or even dozens of meters on the ground, the camera＇ s high- precision geometric optical parameter calibration is a crucial step for data geometric process after aerial photogrammetry. In this paper, the initial value of inner orientation elements （the main distance and principal point offset） and the exterior orientation elements （three elements in a straight -line and three angles elements） were acquired by DLT method, and then the single - image space resection and multi - image space resection methods were used to get the geometric optical parameters of the camera. It is concluded that the multi - image space resection is superior to the single -image space resection.
出处
《国土资源遥感》
CSCD
2011年第1期21-25,共5页
Remote Sensing for Land & Resources
基金
中国科学院重大方向性创新项目(编号:KZCX0622)资助
关键词
几何检校
多片空间后方交会
CCD相机
空间前方交会
Camera geometric calibration
Multi - image space resection
CCD camera
Space forward intersection
