基于无人机实景三维模型的真数字正射影像生成方法  

True digital orthophoto image generation method based on 3D model of UAV real

作　　者：成李博 段平[1,2,3] 李佳 姚永祥[1,2,3] 李晨 王云川 CHENG Libo;DUAN Ping;LI Jia;YAO Yongxiang;LI Chen;WANG Yunchuan(College of Tourism and Geographical Science,Yunnan Normal University,Kunming 650500,China;Key Laboratory of Resources and Environmental Remote Sensing for Universities in Yunnan,Kunming 650500,China;Center for Geospatial Information Engineering and Technology of Yunnan Province,Kunming 650500,China)

机构地区：[1]云南师范大学旅游与地理科学学院,云南昆明650500 [2]云南省高校资源与环境遥感重点实验室,云南昆明650500 [3]云南省地理空间信息工程技术研究中心,云南昆明650500

出　　处：《全球定位系统》2019年第4期25-32,共8页Gnss World of China

基　　金：国家自然科学基金(41961061);云南师范大学2019年度研究生科研创新基金;云南省高校高原山地资源环境遥感监测与评估科技创新团队项目

摘　　要：传统数字正射影像图(DOM)采用微分纠正方法消除相机倾斜与地形起伏所带来的投影误差,但会产生双重投影现象.真数字正射影像(TDOM)可有效解决DOM的双重投影问题.文中提出一种基于无人机影像的实景三维模型TDOM制作方法,首先通过无人机挂载五镜头相机获取航空摄影测量影像并生成实景三维模型;然后采集实景三维模型建筑物顶部轮廓边界线,并构建其三维体模型;最后基于建筑物顶部轮廓边界线三维体模型进行遮蔽检测和遮蔽补偿生成TDOM.以云南师范大学呈贡校区无人机影像实验数据验证了本文方法,实验表明本文的方法可作为一种生成高质量的TDOM方法.Digital Orthophoto Map(DOM)uses digital differential rectification method to eliminate projection error caused by tilted camera and topographic relief,but it can produce double projection phenomenon.True digital orthophoto map(TDOM)can effectively solve the double projection phenomenon of DOM.A method for making TDOM based on the real three-dimensional(3D)model of the Unmanned Aerial Vehicle(UAV)image is proposed.First,the aerial photogrammetry image acquired by UAV mounting five-lens camera and 3D model of real scene is generated.Then the top contour boundary line of the building is collected and its 3D volume model is constructed.Finally,TDOM is generated by occlusion detection and compensation based on 3D model of building top contour boundary line.The UAV image of Yunnan Normal University in Chenggong as experimental data is used as experimental data to verify the proposed method,and the experiments show that the method can be used to generate high quality TDOM.

关 键 词：无人机影像 真数字正射影像 实景三维模型 遮蔽检测 遮蔽补偿 

分 类 号：P231.2[天文地球—摄影测量与遥感]