小型四旋翼无人机序列影像三维重建实验

Experiment on 3D Reconstruction of Small Four-rotor UAV Series Images

传统航空影像三维重建受到时效性、成本等限制,而无人机三维重建技术是解决中小范围三维地形问题的有效手段。基于小型四旋翼无人机航拍序列影像开展了三维重建实验。首先分析了小型无人机航拍三维重建流程的特点,随后重点讨论了无人机三维重建中涉及的关键问题,包括无人机飞行姿态控制、航速、航高、重叠度和拍照模式选择等,最后对比了不同软件的重建结果。实验结果表明,通过优化控制无人机飞行姿态、航高、航速、重叠度等因素,选择合理的序列影像获取模式,在不同的软件中均可完成精度较高的精细地物三维重建。

Traditional 3D reconstruction from aviation images is limited by timelines and cost,while the 3D reconstruction technology using UAV images is an effective means to solve small and medium range 3D terrain.This study focuses on 3D reconstruction experiments of small four-rotor UAV series images.At first,the characteristics of 3D reconstruction flowchart of small unmanned aerial vehicles are analyzed.Then key issues involved in 3D reconstruction are discussed,including UAV’s flight attitude,speed,overlap,and camera mode selection.Finally,the reconstruction results of different software are compared.The experimental results suggest that by optimizing the control of UAV’s flight attitude,altitude,speed,overlap and other factors,and a good series images acquisition mode,high-precision 3D reconstruction of fine features can be completed by different software.