摘要:
为了给地质灾害调查中无人机(unmanned aerial vehicle,UAV)遥感影像处理软件的选择提供参考,对国内外使用较多的DPGfid,PixelGrid,DPMatrix和Inpho等4款软件进行了评价.以固定翼无人机搭载的Cannon 5DMARKⅡ相机获取的江西省龙南县丘陵地区1个架次644张无人机影像作为实验数据,由同一操作者在同一实验环境下分别使用上述4款软件进行了影像预处理、空三平差、数字高程模型(digital elevation model,DEM)生产及数字正射影像图(digital orthophoto map,DOM)生产等实验,从软件功能、效率、成果质量及操作流程等方面进行了对比分析.研究结果表明:4款软件都具有完整的无人机遥感影像处理功能.在利用原始数据生成正射影像的处理效率方面,从高到低依次是Inpho,DPMatrix,DPGrid和PixelGrid;在地质灾害应急调查方面,比较适宜使用DPGrid和DPMatrix进行快速拼图,而对于地质灾害详查,4款软件都能满足需要,其中DPGrid和PixelGrid更方便进行精度控制;在数据处理方面,影像匀光匀色适宜使用Inpho和DPGrid,DEM和DOM成果编辑适宜使用DPGrid.
Abstract:
Unmanned aerial vehicle (UAV) remote sensing has a great application potential in geological disasters monitoring.A plenty of software for UAV image processing has appeared on the market in recent years.In order to provide a valuable reference for choosing UAV image processing software for geological disasters monitoring,the authors evaluated the mostly used software DPGrid,PixelGrid,DPMatrix and Inpho.A block of 644 UAV images of hilly areas acquired in Longnan County of Jiangxi Province by Cannon 5D MARK Ⅱ camera on board a fixed-wing UAV at a flying height of 600 m were used as test data.The preprocessing,aerial triangulation,DEM and DOM generation of these images were performed by one operator using the aforementioned software in the same test environment,then these kinds of software were analyzed in terms of function efficiency,product quality and workflow.The results show that all of these kinds of software have complete UAV image processing capability and the order of processing efficiency from high to low is Inpho,DPMatrix,DPGrid and PixelGrid.For geological disasters emergency survey,it' s better to use DPGrid and DPMatrix to generate fast mosaic.For detailed geological disasters survey,all of these kinds of software can meet the requirement while DPGrid and PixelGrid are more suitable for precision control,Inpho and DPGrid are more suitable for brightness balance and color adjustment,and DPGrid is more suitable for editing DEM and DOM.
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