基于DOM成果的航测软件对比分析

Comparative Analysis of Aerial Survey SoftwareBased on DOM Results

数字正射影像图(DOM)作为目前最受关注的新型地图之一,具有测量精度高、判读性强、直观性强、信息量全等特点。基于无人机航摄像片数据,结合摄影测量软件进行DOM生产是目前的常用方式。基于Smart3D、PhotoScan及Pix4Dmapper 3种数字摄影测量软件,从操作性、清晰度、相机检校误差等方面对3种软件所生产得到的DOM进行了对比分析。结果表明:Smart3D在处理房屋纹理方面效果好,适用于房屋局部较分散的地形;PhotoScan在影像的匀色方面效果更佳,且高程精度较高,适用于地形起伏较大地区的无人机影像;Pix4Dmapper操作简单,全自动能力强,空三精度高,平面精度较好,适用于平原地区。本文结果可为基于无人机航拍数据生产DOM等数字产品中航测软件的选择提供参考。

Digital Orthophoto Map(DOM)is one of the new maps attracting the most attention at present,which is significantly characterized by characteristics of high measurement accuracy,strong interpretation,strong intuitiveness and complete information.Based on UAV aerial camera data,DOM production combined with photogrammetry software is currently a common way.Based on the three-digital photogrammetry softwares of Smart3D,PhotoScan and Pix4Dmapper,the DOM produced by the three softwares was comparatively analyzed in terms of operability,sharpness,and camera calibration errors.The results indicate that,smart3D had a good effect in processing house textures,and was suitable for the local scattered terrain of the house;PhotoScan was better in the uniform color of the image,and the elevation accuracy was higher,which was suitable for drone images in areas with large undulations;Pix4Dmapper was suitable for plain areas,with simple operation,strong automatic ability,high accuracy of three-dimensional,good plane accuracy.The results of this study can provide references for the selection of aerial survey software in the production of digital products such as DOM based on drone aerial data.