单镜头无人机倾斜摄影在DSM数学精度检测中的应用  

Application of single-lens UAV oblique photography in mathematical accuracy inspection of DSM

作　　者：常岑 段顺旭 CHANG Cen;DUAN Shunxu(Jiangsu Quality Supervision and Inspection Station for Surveying and Mapping Products,Nanjing,Jiangsu 210013,China)

机构地区：[1]江苏省测绘产品质量监督检验站,江苏南京210013

出　　处：《北京测绘》2024年第12期1665-1669,共5页Beijing Surveying and Mapping

基　　金：江苏省自然资源厅科技项目(2023019)。

摘　　要：针对实景三维场景中的数字表面模型(DSM)成果数学精度检验工作,常规检验方法效率低下,不能满足大范围DSM更新检查频率要求的问题,本文通过比较五镜头和单镜头倾斜摄影在数据获取效率、数据存储和使用成本等方面的优劣,确定采用单镜头无人机倾斜摄影技术对DSM数学精度进行检验。通过分析单镜头倾斜摄影建模中不同像控点布设数量对三维模型成果精度的影响,得到布设密度为400~600 m的像控点可保证模型精度。此外,进一步比较了单节点和多节点计算机在空三解算和三维模型建模上的效率,确定单节点解算空三,多节点构建三维模型的硬件配置方案。在此基础上,在实验区开展常规方法与倾斜三维模型方法在检验工作中的一致性比对,发现两种方法得到的检验结果基本一致,且倾斜三维模型方法能够大幅提高DSM数学精度的检验效率,可以满足大范围的DSM检验工作要求。The conventional methods for mathematical accuracy inspection of the digital surface model(DSM)results in realistic three-dimensional(3D)scenes are inefficient and fail to meet the requirements of frequent updates over large areas.This paper compared the advantages and disadvantages of five-lens and single-lens oblique photography in terms of data acquisition efficiency,data storage,and cost of use and determined the use of single-lens unmanned aerial vehicle(UAV)oblique photography for the mathematical accuracy inspection of DSM.By analyzing the impact of different numbers of control points laid out in the single-lens oblique photography modeling on the accuracy of the 3D model results,it was found that a control point density of 400-600 m could ensure model accuracy.Furthermore,the efficiency of single-node and multinode computers in aerial triangulation and 3D modeling was compared,determining the hardware configuration of singlenode computers for aerial triangulation and multi-node computers for 3D modeling.On this basis,a consistency comparison of the conventional method and the oblique 3D model method in the inspection work was carried out in the experimental area.The inspection results obtained by the two methods were basically consistent,and the oblique 3D model method could greatly improve the mathematical accuracy inspection efficiency of DSM,which can meet the requirements of large-area DSM inspection work.

关 键 词：单镜头 倾斜摄影 数字表面模型(DSM) 数学精度检测 

分 类 号：P237[天文地球—摄影测量与遥感]