摘要
近年来无人机倾斜摄影技术逐渐成熟,产品越来越丰富。为快速、高效的生产高精度的空三加密结果、数字正射影像图(DOM)、密集点云数据、实景三维模型等数字测绘产品,提出一种利用低空无人机倾斜摄影测量生产途径。以西北大学长安校区为实验区,利用Md4-1000型四旋翼无人机搭载五镜头相机进行倾斜摄影飞行试验,通过多视影像匹配、空三加密、影像密集匹配、构建三角网、纹理映射等技术生成空中三角测量、实景三维模型、DOM等成果。通过实测数据分别验证正视影像空中三角测量、正视影像联合倾斜影像空中三角测量、DOM、实景三维模型的精度。结果表明,基于倾斜影像生产的数字测绘成果满足高精度的需求,对其进一步应用具有指导意义。
In recent years,the oblique photography technology of unmanned aerial vehicle has been developing gradually and producing more and more abundant products.A production method that uses oblique photogrammetry of low-altitude unmanned aerial vehicle was proposed to rapidly and effectively produce digital mapping products with high accuracy,such as three-dimensional triangulation results,digital orthophoto map(DOM),dense point cloud data,and realist 3D model,etc.Based on the experimental site Chang'an Campus of Northwest University,the Md4-1000 quad-rotor unmanned aerial vehicle equipped with a five-lens camera was used to carry out oblique photography flight test,and the results of aerial triangulation,realistic three-dimensional model,and DOM were obtained by means of multiple image matching,three-dimensional triangulation,image-intensive matching,construction of triangulation network,texture mapping and other technologies.Through the measured data,the accuracy of the front image aerial triangulation,front image and oblique image aerial triangulation,DOM and realistic 3D models were verified.It turned out that the digital mapping results based on the oblique image meet the high-precision demand and have guiding significance for its further application.
作者
李欢
Li Huan(College of Geological Engineering and Geomatics,Chang'an University,Xi'an 710064,China)
出处
《甘肃科学学报》
2020年第2期27-33,共7页
Journal of Gansu Sciences
基金
国家自然科学基金项目(41301386)
长安大学中央高校基本科研业务费专项(300102269205)。
