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,whichbringsahugeworkloadtotheimagegeometriccor

2、rectionthroughmanualgroundcontrolpoint(GCP)selection.GCPsautomaticallyselectedbasedonsoftwareisoneoftheeffectivemethodstocutdownmanualoperation.TheGCPsobtainedfromthatwayisgenerallyredundant.Inthispaper,aftersomeexistingmethodsaboutautomaticoptimizationofG

3、CParesummarized,anewmethodofautomaticoptimizationofGCPbasedonVoronoiDiagram(Thiessenpolygon)isproposed.ThismethodusestheratioofThiessenPolygonmax-minareageneratedbyGCPasthebasisandfilterGCPfromtheoverfulloneswithoutmanualsubjectivityforbetteraccuracy.Exper

4、imentsinthispaperalsodemonstratedtherelationshipbetweentheaccuracyofgeometriccorrectionandthedistributionofGCP.©2011PublishedbyElsevierLtd.Selectionand/orpeer-reviewunderresponsibilityoftheIntelligentInformationTechnologyApplicationResearchAssociation.©201

5、1PublishedbyElsevierLtd.Selectionand/orpeer-reviewunderresponsibilityof[nameorganizer]Keywords:GeometricCorrection;GCPDistribution;DelaunayTriangulation;ThiessenPolygon1.IntroductionRemotesensingisbeingusedinthedevelopmentofnationaleconomywidely.Duetothere

6、motesensingimagingmechanism,theimagescannotbeusedwithoutaseriesofpre-processes,suchasnoisefiltering,radiometriccorrection,geometriccorrection.Groundcontrolpoint(GCP)selectionisanimportantstepinthegeometriccorrectionofremotesensingimage.Theprecisionofgeomet

7、riccorrectiondependsonthequantity,accuracyanddistributionofthegroundcontrolpoint(GCP)[1].GCPisanimportantsourceoffundamentaldataintheaerialphotographandremotesensingimage'sGeometricCorrection[2].ThenumberofGCPsthatisneededintheprocessofGeometricCorrectioni

8、sdeterminedbydifferentkindsofreasons,including:methodoftheoriginalimagecorrection,thetypeoftheoriginalimageandtherequiredmappingaccuracyofthesoftwarethatisused.TherearemanywaystocollectGCP,mainlydistinguished