无人机影像中的无控制高程信息提取方法研究

A method of extracting elevation without GCPs based on UAV images

本文提出了一种基于无人机影像获取高程信息的方法,该方法无需地面控制点数据,只利用无人机的飞控数据以及相机自身的参数。文中推导了不同飞行状况下的几何计算模型,并利用真实的无人机数据进行实验和误差分析,证明了该方法的可行性。最后还将地物点的高程扩展到其所在的平面中,改善了直观观测效果。实验表明,本文提出的方法能够大大提高获取地物高程信息的效率。

This paper put forward a method to extract elevation information from UAV images only using GPS/POS data and several parameters of the camera, without involving any Ground Control Points （GCPs） . Geometric models under different flight attitudes were derived, and a real-data experiment was designed to verify the feasibility and precision of this method. In addition, image seg- mentation was used to expand the elevations of points into corresponding planes. The experiment proved the proposed method to be ef- fective to get elevation information of ground objects.