摘要
无人机倾斜摄影三维模型的精度是衡量模型质量好坏的重要指标.常规的倾斜摄影三维建模需要先布设像控点,作业效率低且维护成本高.无像控建模不需要布设像控点,航测效率高,但精度较低.本文以南京信息工程大学东苑为实验区,研究了一种像控后处理倾斜摄影三维建模方法.结果表明:1)基于像控后处理建立的三维模型与常规方法建立的三维模型精度基本相同,平面中误差、高程中误差均小于0.05 m,满足高效率、高精度、低成本的建模要求;2)像控后处理建模避免了制作和维护像控点的过程,同时基于已有高精度三维模型选择像控点并提取坐标,提升了像控点选择的科学性并降低了外业测点的工作量;3)该方法在城市、乡镇及其他道路丰富地区高精度三维实景模型定期更新上具有较好的普适性.
Accuracy is an important indicator of the three-dimensional(3D)model of UAV oblique photography.Conventional modeling need to deploy Ground Control Points(GCPs),which is inefficient and costly.Control-free modeling does not require GCPs,which is efficient but not accurate.Here,we propose a 3D modeling approach for oblique photography with post-processed image control.The study was carried out in the east area of Nanjing University of Information Science&Technology.The results show that both the 3D models established by conventional modeling and post-processed image control modeling are accurate,with plane errors and elevation errors less than 0.05 m,meeting the modeling requirements of high efficiency,high precision and low cost.However,the post-processed image control modeling avoids the making and maintaining of the image control points,instead,it deploys the existing high-precision 3D model to select image control points and extract the coordinates.The proposed approach can be applied to regular updating of high-precision 3D real scene models for cities,towns,roads,etc.
作者
程建荣
王春
代文
李敏
周毅阳
CHENG Jianrong;WANG Chun;DAI Wen;LI Min;ZHOU Yiyang(School of Remote Sensing&Geomatics Engineering,Nanjing University of Information Science&Technology,Nanjing 210044;School of Geographic Information and Tourism,Chuzhou University,Chuzhou 239000;School of Geographical Sciences,Nanjing University of Information Science&Technology,Nanjing 210044;Anhui Key Laboratory of Real Geographical Environment,Chuzhou University,Chuzhou 239000)
出处
《南京信息工程大学学报(自然科学版)》
CAS
北大核心
2023年第4期488-495,共8页
Journal of Nanjing University of Information Science & Technology(Natural Science Edition)
基金
安徽高校自然科学研究重大项目(KJ2021ZD0130)
滁州市“113”产业创新团队(实景地理环境智能科技产业创新)。
关键词
倾斜摄影
像控点
三维实景模型
像控后处理
精度
oblique photography
image control point
realistic 3D model
post-processed image control
precision