无人机贴近摄影测量技术在城市建筑三维精细建模中的应用研究

Research on the Application of UAV Proximity Photogrammetry Technology in 3D Fine Modeling of Urban Buildings

本文通过无人机正射摄影测量得到的空三点云进行贴近摄影航线规划,无人机按照贴近摄影测量航线进行数据采集,高效、精准地获取建筑物的摄影测量资料,应用摄影测量处理软件建立测区实景三维模型,用来解决常规倾斜摄影生产出的模型成果经常会出现凹凸不平、建筑物墙体扭曲、悬浮物等问题。同时利用多次采集影像和提高重叠率的方法解决在建模时出现的模型的重建完整率低、模型的空洞多或者模型缺失的问题,建立高精度模型。

In this paper, the aerial triangular point cloud obtained by the UAV orthophotogrammetry is used to plan the proximity photographic route, and the UAV collects data according to the proximity photogrammetry route, so as to obtain the photogrammetry data of the building efficiently and accurately, and the photogrammetry processing software is used to establish the real-life 3D model of the survey area, which is used to solve the problems of unevenness, distortion of building walls, and suspended matter in the model results produced by conventional oblique photography. At the same time, the method of multiple image acquisition and increasing the overlap rate is used to solve the problems of low reconstruction integrity rate, many cavities or missing models of the model during modeling, and establish a high-precision model.