基于Pix4Dmapper软件的大疆Phantom4 RTK正射影像图精度分析

Accuracy Analysis of DJI Phantom4 RTK Orthophoto Based on Pix4Dmapper Software

针对无人机正射影像图精度分析,提出一种基于Pix4Dmapper软件的大疆Phantom4 RTK正射影像图精度分析方法。该方法以大疆精灵4 RTK为例,利用Pix4Dmapper软件对其飞行的照片数据进行解算,针对同一作业区域比较了3D倾斜摄影飞行模式和2D正射飞行模式所产生的正射影像在平面精度和高程精度上的差异;分析了低空飞行模式下,采用像控点参与解算对成果精度的影响。实验结果表明,Phantom4 RTK在低空2D正射影像飞行模式下可以达到免像控生产正射影像图和地形图的要求,为无人机正射影像图精度分析提供了一种新思路。

Aiming at the accuracy analysis of UAV orthophoto,a precision analysis method of DJI Phantom4 RTK orthophoto based on Pix4Dmapper software is presented.Taking DJI Phantom4 RTK as an example,this method uses Pix4Dmapper software to solve the photo data of its flight,and compares the difference in plane accuracy and elevation accuracy of orthophoto generated by 3D oblique photography flight mode and 2D ortho flight mode for the same operation area.The influence of image control points on the accuracy of results is analyzed in low altitude flight mode.Experiments results show that Phantom4 RTK can meet the requirements of producing orthophoto and topographic map without image control in low altitude 2D orthophoto flight mode,which provides a new idea for the accuracy analysis of UAV orthophoto.