无人机倾斜摄影测量在立交桥三维重建中的应用

Application of UAV tilt photogrammetry in 3D reconstruction of overpass

本文介绍了无人机倾斜摄影测量技术及涉及的关键技术,首先通过设计的无人机航线采集某立交桥高重复度的倾斜影像,然后对采集影像数据的处理流程及利用采集影像数据进行立交桥三维建模的技术流程进行了详细阐述,并建立了立交桥场景的三维可测量模型。通过测量选取的实地点坐标并与桥模型上对应点位坐标进行精度对比,结果表明通过无人机采集的倾斜影像制作的实三维景模型精度可靠,平面和高程精度均符合规范要求,可应用于立交桥等建筑的实际工程中。

This paper introduces the UAV tilt photogrammetry technology and its key technologies.Firstly,the high repetition rate oblique image of an overpass is collected through the designed UAV route.Secondly,the processing flow of the collected image data is described in detail,and the technical process of using the collected image data for the 3 D modeling of the overpass is also described in detail.Finally,the 3D measurable model of the overpass scene is established.By comparing the accuracy of the selected real site coordinates with the corresponding point coordinates on the bridge model,the results show that the accuracy of the real 3 D scene model is reliable,which is made by the inclined image collected by UAV,and the plane and elevation accuracy meet the requirements of the specification,which can be applied to the practical engineering of overpass and other buildings.