基于无人机倾斜摄影的白格堰塞区三维重建

为研究倾斜摄影技术在堰塞灾害现场的适用性,在介绍倾斜摄影的建模原理的基础上,阐述了无人机倾斜摄影的步骤要点,并在白格堰塞现场进行了无人机飞行作业。以无人机所采集的POS数据、图像数据为基础,进行了图像筛选、空中三角测量计算、点云稠密重建及点云三角化,完成了白格堰塞区三维数字模型重建。以数字高程模型、数字地表模型、正射影像等形式展示了白格堰塞区地貌,并测算了白格堰塞体形态、结构等方面的特征信息。结果表明,无人机倾斜摄影可以适应堰塞现场的复杂环境,具备快速进入目标区域、高效完成测绘任务的能力。

3D reconstruction of Baige landslide area based on UAV oblique photographs

In order to study the applicability of oblique photography in the field of damming hazard, the model construction principles of oblique photography were introduced, and the key steps of UAV oblique photography were expounded. Based on the POS data and image data collected by the UAV, image screening, air triangulation calculation, point cloud dense reconstruction and point cloud triangulation were carried out to complete the 3D digital model reconstruction, and the terrain of the Baige damming area is displayed in the form of digital elevation model, digital surface model and orthoimage. The morphology of the Baige dam is also measured. The results show that UAV oblique photography can well adapt to the complex environment of the damming site, and has the ability to access the target area quickly and complete the mapping task efficiently.