像控点设计方案对正射影像与三维倾斜模型的精度影响

The influence of different image control point design schemes on the accuracy of orthophoto and 3D tilt model

无人机航空摄影测量的出现,使得传统测绘复杂、繁重的外业工作发生了革命性的改变。像控点的布设对于无人机摄影测量显得尤为重要,以至于布设方案的优化设计直接影响后期4D产品及三维模型的精度。本文选取建筑物较高、地形较平坦的校园为研究区域,通过优化设计不同的像控点布设方案,利用多旋翼无人机搭载五镜头相机获取研究区域的影像数据,并分别采用不同数据处理系统进行空中加密,来获取研究区域的4D产品及倾斜三维模型,通过分别对数字正射影像(DOM)、数字表面模型(DSM)及三维模型成果的精度分析,为后续实际工作中像控点的布设提供技术支撑及建议。

The emergence of unmanned aerial vehicle(UAV)aerial photogrammetry has revolutionized the complex and heavy field work of traditional surveying and mapping.The layout of image control points is particularly important for UAV photogrammetry,so that the optimal design of layout scheme directly affects the accuracy of later four-dimensional(4D)products and three-dimensional(3D)models.In this paper,the campus with high buildings and flat terrain was selected as the research area.By optimizing the layout scheme of different image control points,the multi rotor UAV was equipped with a five lens camera to obtain the image data of the research area,and different data processing systems were used for aerial encryption to obtain the 4D products and inclined 3D models of the research area.Through the accuracy analysis of digital orthophoto map(DOM),digital surface model(DSM)and 3D model results respectively,it could provide technical support and suggestions for the layout of image control points in subsequent practical work.