本科毕业论文---research on impact of ground control point distribution on image geometric rectification based on voronoi diagram论文.doc

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1、ResearchonImpactofGroundControlPointDistributiononImageGeometricRectificationBasedonVoronoiDiagramAbstractWiththedevelopmentofremotesensingsatellites,thedataquantityofremotesensingimageisincreasingtremendously,whichbringsahugeworkloadtotheimagegeometriccorrectionthrou

2、ghmanualgroundcontrolpoint(GCP)selection.GCPsautomaticallyselectedbasedonsoftwareisoneoftheeffectivemethodstocutdownmanualoperation.TheGCPsobtainedfromthatwayisgenerallyredundant.Inthispaper,aftersomeexistingmethodsaboutautomaticoptimizationofGCParesummarized,anewmeth

3、odofautomaticoptimizationofGCPbasedonVoronoiDiagram(Thiessenpolygon)isproposed.ThismethodusestheratioofThiessenPolygonmax-minareageneratedbyGCPasthebasisandfilterGCPfromtheoverfulloneswithoutmanualsubjectivityforbetteraccuracy.Experimentsinthispaperalsodemonstratedthe

4、relationshipbetweentheaccuracyofgeometriccorrectionandthedistributionofGCP.©2011PublishedbyElsevierLtd.Selectionand/orpeer-reviewunderresponsibilityoftheIntelligentInformationTechnologyApplicationResearchAssociation.©2011PublishedbyElsevierLtd.Selectionand/orpeer-revi

5、ewunderresponsibilityof[nameorganizer]Keywords:GeometricCorrection;GCPDistribution;DelaunayTriangulation;ThiessenPolygon1.IntroductionRemotesensingisbeingusedinthedevelopmentofnationaleconomywidely.Duetotheremotesensingimagingmechanism,theimagescannotbeusedwithoutaser

6、iesofpre-processes,suchasnoisefiltering,radiometriccorrection,geometriccorrection.Groundcontrolpoint(GCP)selectionisanimportantstepinthegeometriccorrectionofremotesensingimage.Theprecisionofgeometriccorrectiondependsonthequantity,accuracyanddistributionofthegroundcont

7、rolpoint(GCP)[1].GCPisanimportantsourceoffundamentaldataintheaerialphotographandremotesensingimage'sGeometricCorrection[2].ThenumberofGCPsthatisneededintheprocessofGeometricCorrectionisdeterminedbydifferentkindsofreasons,including:methodoftheoriginalimagecorrection,th

8、etypeoftheoriginalimageandtherequiredmappingaccuracyofthesoftwarethatisused.TherearemanywaystocollectGCP,mainlydistinguished