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ID:36738937
大小:2.97 MB
页数:9页
时间:2019-05-14
《大范围倾斜多视影像连接点自动提取的区域网平差法-闫利》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第45卷第3期测绘学报Vol.45,No.32016年3月ActaGeodaeticaetCartographicaSinicaMarch,2016引文格式:闫利,费亮,叶志云,等.大范围倾斜多视影像连接点自动提取的区域网平差法[J].测绘学报,2016,45(3):310-317.DOI:10.11947/j.AGCS.2016.20140673.YANLi,FEILiang,YEZhiyun,etal.AutomaticTie-pointsExtractionforTriangulationofLarge-scaleObliqueMulti-viewImages[J]
2、.ActaGeodaeticaetCartographicaSinica,2016,45(3):310-317.DOI:10.11947/j.AGCS.2016.20140673.大范围倾斜多视影像连接点自动提取的区域网平差法闫利,费亮,叶志云,夏旺武汉大学测绘学院,湖北武汉430079AutomaticTie-pointsExtractionforTriangulationofLarge-scaleObliqueMulti-viewImagesYANLi,FEILiang,YEZhiyun,XIAWangSchoolofGeodesyandGeomatics,Wuhan
3、University,Wuhan430079,ChinaAbstract:Anewtie-pointsextractionandbundleblockadjustmentmethodforlarge-scalemulti-viewobliqueimagesispresented.Firstly,exteriororientationdatagainedbyPOSareusedtorectifyobliqueimagesandpredictimagecorrespondences,whichcanbematchedusingSIFTalgorithm.Secondly,an
4、unorderedfeaturetrackingmethodreliesonunion-findalgorithmareadaptedtodetectthemulti-viewcorrespondences.Aftertie-pointsextracted,bundleadjustmentaredonewithPOSandcontrolpointsdatatreatedasweightedmeasurement.Intheexperimentpart,threekindsofobliqueimages,takenbyassembledlightweightobliques
5、ystem,UltraCamandSWDC-5,areusedtotestthealgorithmabove.Theresultsshowthatourmethodcanadaptthepopularobliquesystemsathomeandabroad,whichcanprocessover2000imagesatatime.Andtheprecisionofobliquetriangulationisbetterthanthetraditionalverticaltriangulation,withanaccuracyof0.75GSDinhorizontaldi
6、rection,2.0GSDinelevationdirection.Keywords:obliqueimages;automatictriangulation;bundleblockadjustment;tie-pointsextractionFoundationsupport:TheNationalKeyTechnologyResearchandDevelopmentProgramoftheMinistryofScienceandTechnologyofChina(No.2012BAJ23B00);TheFundamentalResearchFundsfortheCe
7、ntralUniversities(No.2015214020201)摘要:提出了一种大范围倾斜多视影像自动连接点提取和光束法区域网平差算法。首先利用POS数据对倾斜影像进行矫正并预测候选像对,使用SIFT特征进行影像匹配;然后利用并查集数据结构实现多视影像间连接点对应关系的快速确定;最后将POS数据和控制点数据作为带权观测值进行平差解算。选取3种典型的倾斜相机系统(组装轻量级倾斜相机、国产SWDC-5相机、微软UltraCam相机)进行了试验,结果表明,本文算法能够适应国内外流行的倾斜摄影系统,且一次性可处理的影像数目超过2
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