一种倾斜影像外方位元素计算方法

发布时间：2018-01-13 07:42

本文关键词：一种倾斜影像外方位元素计算方法　出处：《测绘科学技术学报》2016年03期 　论文类型：期刊论文

【摘要】：提出一种利用相机POS数据和少量影像数据标定倾斜相机间位置关系并计算倾斜影像粗略外方位元素的方法。首先对选取的垂直和倾斜影像进行影像匹配,获得精确同名点坐标;然后垂直影像同名点对前方交会获得地面点坐标,接着倾斜影像后方交会获得其外方位元素;最后利用倾斜和垂直影像的外方位元素标定子相机间的相对关系,并根据相对关系求出所有倾斜影像的外方位元素。采用AMC580倾斜影像数据进行试验,结果表明:提出方法可求得所有倾斜影像的粗略外方位元素,并验证了外方位元素的直接对地定位精度,证明了该方法的可行性。
[Abstract]:This paper presents a method of calibrating the position relationship between tilted cameras using camera POS data and a small amount of image data, and calculates the rough external azimuth elements of tilted images. Firstly, the selected vertical and inclined images are matched. The exact coordinates of the points with the same name are obtained; Then the vertical image points with the same name meet in front to obtain the ground point coordinates, and then the oblique image rear rendezvous obtains its external azimuth elements. Finally, the relative relationship between the subcameras is calibrated by the external azimuth elements of the tilt and vertical images, and all the external azimuth elements of the tilt images are obtained according to the relative relations. The experiments are carried out with the AMC580 tilt image data. The results show that the proposed method can obtain rough outer-azimuth elements of all oblique images, and verify the accuracy of direct-to-ground localization of outer-azimuth elements, which proves the feasibility of this method.
【作者单位】：信息工程大学;国网河南省电力公司郑州供电公司;
【基金】：国家自然科学基金项目(41401534)
【分类号】：P23
【正文快照】： 目前,GPS/IMU系统已经广泛应用于摄影测量领域,并向小型化、低成本方向发展,这使简易摄影测量装置携带定位定向辅助设备成为了可能。倾斜摄影测量系统沿用常规航摄仪集成GPS/IMU系统的方式,即垂直相机和GPS/IMU系统硬件设备安装位置相对固定,执行航摄任务时可通过GPS/IMU系统

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