一种无人机倾斜摄影测绘研究

Research on a kind of UAV tilt photogrammetry

基于无人机倾斜摄影测绘获得的多视点图像具有高重叠、多角度的特点,提出了一种改进的无人机多片前方交会倾斜立体测绘方案。自动选择多幅底高较好的图像对,在多幅图像中找到具有相同像点的同一地物进行立体测绘,从而提高整体测绘精度。以某区域247幅无人机倾斜摄影图像为例,对所提方法进行仿真验证。结果表明,所提方法平均达标率为55.39%,平均精度为0.0436 m。与传统方法相比,达标率提高了18.1%,平均精度提高了0.0777 m。

In order to improve the limited coordinate accuracy of traditional UAV mapping,in the process of multiple imaging,considering the characteristics of high overlap and multi angle of multi view images obtained by UAV tilt photogrammetry,an improved UAV multi-slice forward intersection tilt stereo mapping scheme are proposed.It can automatically select multiple image pairs with better bottom height,and find the same ground object with the same image point in multiple images for three-dimensional mapping,so as to improve the overall mapping accuracy.In the simulation stage,247 tilt camera images of UAV in a certain area are taken as an example to verify the proposed scheme.The simulation results show that the average compliance rate of this method is 55.39%and the average accuracy is 0.0436 m.Compared with the traditional method,the standard rate is increased by 18.1%,and the average accuracy is improved by 0.0777 m.