摘要
由于大型遥感卫星外壳具有多面体结构,产生了相邻面之间的照片采集重叠率低以及定向靶标局部可见等现象,最终导致摄影测量网络定向完整度低,测量精度降低。为此,提出一种针对大型立体结构的摄影测量网络定向方法。首先在五点法基础上利用局部图像对上的同名编码点解算图像对之间的相对外方位参数,然后以公共点数量和反投影误差最小作为依据,建立图像全局相对定向链路并扩展图片定向网络,从而实现多面体结构摄影测量图像网络的全局相对定向。使用所提方法对3.5 m×3.5 m×2.2 m的某遥感卫星壳体进行摄影测量,结果表明,所提方法的定向完整度和精度优于传统定向算法。所提方法能够为多面体航天器构件的摄影测量提供准确可靠的图片外方位参数初值,定向角度标准差小于0.0003 rad,平移量标准差小于0.7 mm。
The outer surface of large remote sensing satellites consists of polyhedral structure.The overlap rate between images of adjacent surfaces are very low and the orientation target is visible in just a few images.As a result,it is difficult to orient the whole photogrammetric image network.The measurement accuracy of such structure is low.A photogrammetric network orientation method for large three-dimensional(3 D)structures is proposed.The relative exterior orientation parameters between images are solved by the 5-point method using several coded targets.Then,a relative orientation link is built and extended to involve all the images by maximizing the number of coded targets.In this way,the back-projection error is minimized,and the global relative orientation of the photogrammetric image network of large 3 D structures is realized.The method is applied to photogrammetric measurement of the out surface of a 3.5 m×3.5 m×2.2 m remote sensing satellite.Results show that the orientation completion and accuracy of the method are better than those of the traditional methods.The method provides accurate and reliable initial estimation of exterior parameters for the photogrammetric images of large spacecraft components with 3 D structures.The standard deviation of exterior angle parameters is smaller than 0.0003 rad,and the standard deviation of translation parameters is smaller than 0.7 mm.
作者
韩首榜
董明利
孙鹏
燕必希
王君
Han Shoubang;Dong Mingli;Sun Peng;Yan Bixi;Wang Jun(Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument,Beijing Information Science&Technology University,Beijing 100192,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2020年第4期200-207,共8页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(51475046)
北京市教委科技计划重点项目(KZ201711232029)资助。
关键词
摄影测量
相对定向
五点法
测量网络
定向链路
遥感卫星外壳
photogrammetry
relative orientation
five-point method
measurement network
orientation link
remote sensing satellite outer surface