摘要
依据灭点理论,推导了空间铅垂线与航空影像的空间姿态角之间的关系及其相应的误差方程式,并分析了铅垂线辅助的单像空间后方交会和单模型绝对定向中所需的控制点数。最后,通过实际数据的试验研究了铅垂线辅助的单像空间后方交会和单模型绝对定向的精度与可靠性。试验结果表明,在传统的单像空间后方交会和单模型绝对定向中引入铅垂线约束条件,不仅定向精度与传统的基于控制点的绝对定向精度相当,而且可以减少所需的控制点数以及定向精度对控制点分布的依赖性。
The absolute orientation of aerial imagery over urban areas combined with vertical lines is discussed. According to the theory of vanishing point, the relationship between the spatial vertical lines and azimuth angles of the aerial imagery, and the corresponding error equation of the vertical lines have been deduced. Then the necessary control points number of the single photo space resection and absolute orientation of the single stereo-model has also been aniysised. The test results show that, while the vertical line constrains has been applied in the single photo space resection and single stereo-model absolute orientation, not only the accuracy of the absolute orientation is the same as the traditional absolute orientation with control points only, but also the necessary control points number and the dependency of the layout of the control points have been reduced. The work presented provides a new way for the calculation of the exterior orientation parameters of the aerial imagery over urban areas.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2007年第3期197-200,共4页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(40371099)
关键词
铅垂线
灭点
方位元素
绝对定向
vertical lines
vanishing point
exterior orientation parameters
absolute orientation
