Accurate 3D Target Positioning in Close Range Photogrammetry with Implicit Image Correction

Accuratethree-dimensional(3D)targetpositioningisofgreatimportanceinmanyindustrialapplications.Althoughvariousmethodsforreconstructing3Dinformationfromasetofimageshavebeenavailableintheliterature,fewofthempayenoughattentiontotheindispensableprocedures,suchastargetextractionfromimagesandimagecorrectionhavingstronginfluencesuponthe3Dpositioningaccuracy.Thisarticleputsforwardahigh-precisionellipsecenter(targetpoint)extractionmethodandanewimagecorrectionapproachwhichhasbeenintegratedintothe3Dreconstructionpipelinewithaconciseimplicitmodeltoaccuratelypensatesfortheimagedistortion.Themethodsareappliedtoacopyright-reservedcloserangephotogrammctricsystem.Realmeasuringexperimentsandindustrialapplicationshaveevidencedtheproposedmethods,whichcansignificantlyimprovethe3Dpositioningaccuracy.

ZhangLiyan,DuXiaoyu(CollegeofMechanicalandElectronicEngineering,NanjingUniversityofAeronauticsandAstronautics,Nanjing210016,China) 

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