航空摄影测量影像定向的若干探讨

doi:10.11867/j.issn.1001-8166.2007.08.0828

地球科学进展 ›› 2007, Vol. 22 ›› Issue (8): 828 -834. doi: 10.11867/j.issn.1001-8166.2007.08.0828

航空摄影测量影像定向的若干探讨

袁修孝 ^1,2

1.武汉大学遥感信息工程学院，湖北武汉 430079; 2.武汉大学测绘遥感信息工程国家重点实验室，湖北武汉 430079

收稿日期:2007-04-02 修回日期:2007-06-25 出版日期:2007-08-10
通讯作者: 袁修孝(1963-)，男，湖北阳新人，教授，主要从事航空航天遥感高精度对地目标定位理论与方法、高分辨率卫星遥感影像几何处理、影像变化检测与数据更新等研究.E-mail：yxxqxhyw@public.wh.hb.cn E-mail:yxxqxhyw@public.wh.hb.cn
基金资助:
教育部新世纪优秀人才支持计划项目“无控制点航空遥感对地目标定位”(编号：NCET-04-0662)；教育部长江学者和创新团队发展计划—创新团队项目“武汉地球空间信息创新平台”（编号：IRT0438）资助.

Some Investigations of Image Orientation in Aerial Photogrammetry

YUAN Xiu-xiao ^1,2

1. School of Remote Sensing and Information Engineering, Wuhan University; 2. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China

Received:2007-04-02 Revised:2007-06-25 Online:2007-08-10 Published:2007-08-10

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简要叙述了现行航空摄影测量的作业模式和关键技术要求，分析了直接利用航摄像片外方位元素恢复立体模型所得到的目标点物空间位置精度以及模型点的上下视差。经对带有双频动态GPS数据的1∶2 500～1∶60 000各种摄影比例尺的覆盖多种地形航摄像片的试验表明，由摄影测量加密所获取的影像外方位元素可直接用于4D产品生产中的影像定向，而由POS系统提供的影像外方位元素还难以直接用于摄影测量测图。 

关键词: 全球定位系统（GPS）, 立体模型恢复, 精度, 航空摄影测量, 定位定姿系统（POS）

Aerial photogrammetry is the science and technology for obtaining threedimensional spatial information about the Earth surface from aerial images. The key point of this issue is the rapid and accurate determination of image's position and attitude. This goal is met by aerial triangulation based on well distributed ground control points (GCPs) in conventional photogrammetry. With the wide application of global positioning system (GPS) and position and orientation system (POS), image exterior orientation elements can be acquired at the instant of imaging. Therefore, the stereo model reconstitution and direct georeferencing are becoming a new topic in aerial photogrammetry. Aerial triangulation evolves and progresses towards digital mapping without GCPs. This paper describes the operational issues and basic technical requirements of modern aerial photogrammetry. The accuracy of photogrammetric point determination and the yparallax at corresponding model points are analyzed when stereo models are reconstituted by using the exterior orientation elements of aerial images. Real aerial photographs, at image scales from 1∶2 500 to 1∶60 000, with POS data taken over various topographic forms in China were processed by our POSsupported bundle block adjustment program WuCAPS. The empirical results verified that the accuracy of the exterior orientation elements from bundle block adjustment met the requirements of the specifications of topographic mapping. However, the accuracy of the exterior orientation elements determined by POS failed to meet the requirements of the specifications of topographic mapping.

Key words: Accuracy., Aerial photogrammetry, Global Positioning System (GPS), Position and orientation system (POS), Stereo model reconstitution

中图分类号:

P231

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