基于无人机倾斜摄影测量的像控点布设方案及精度分析

Layout plan and accuracy analysis of image control points based on drone tilt photogrammetry

无人机倾斜摄影测量技术因其操作简单、灵活方便已在空间三维数据采集中得到迅猛发展。利用无人机进行倾斜摄影施测阶段的重要步骤之一就是像控点的布设。本文以绍兴市经开区某地为试验区域,利用大疆无人机搭载SONY-QX100数码相机进行航摄,获取试验区影像数据,重点设计了4种不同的像控点布设方案并对各像控点布设方案得到的成果进行精度分析。试验结果表明:各像控点布设方案的空三平差解算平面精度与模型成果平面精度受像控点个数与布设位置影响较小,空三平差解算高程精度与模型成果高程精度受像控点个数与布设位置影响较大。

The unmanned aerial vehicle tilt photogrammetry technology has rapidly developed in spatial 3D data acquisition due to its simple operation,flexibility,and convenience.One of the important steps in using drones for oblique photography during the survey phase is the placement of image control points.In this article,a certain area in the Economic and Technological Development Zone of Shaoxing City is taken as an experimental area,and a DJI drone equipped with a SONY-QX100 digital camera for aerial photography is used to obtain image data of the experimental area.It focuses on designing four different layout plans for image control points and analyzing the accuracy of the results obtained from each layout plan.The experimental results show that the accuracy of the spatial adjustment solution plane and the model result plane of each image control point layout plan are less affected by the number and layout position of the image control points,while the accuracy of the spatial adjustment solution elevation and the model result elevation are more affected by the number and layout position of the image control points.