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1、ISPRSJournalofPhotogrammetryandRemoteSensing67(2012)35–44ContentslistsavailableatSciVerseScienceDirectISPRSJournalofPhotogrammetryandRemoteSensingjournalhomepage:www.elsevier.com/locate/isprsjprsImprovingclassificationaccuracyofairborneLiDARintensitydatabygeometriccalibra
2、tionandradiometriccorrectionaa,⇑bbWaiYeungYan,AhmedShaker,AymanHabib,AnaPaulaKerstingaDepartmentofCivilEngineering,RyersonUniversity,350VictoriaStreet,Toronto,Ont.,CanadaM5B2K3bDepartmentofGeomaticsEngineering,UniversityofCalgary,2500UniversityDriveNW,Calgary,AB,CanadaT2
3、N1N4articleinfoabstractArticlehistory:Airbornelightdetectionandranging(LiDAR)systemsareusedtomeasuretherange(distancefromtheReceived21April2011sensortothetarget)andtheintensitydata(thebackscatteredenergyfromthetarget).LiDARhasbeenReceivedinrevisedform11October2011usedext
4、ensivelytomodelthetopographyoftheEarthsurface.Nowadays,LiDARsystemsoperatinginAccepted12October2011thenear-infraredspectralrangearealsogaininghighinterestforlandcoverclassificationandobjectrec-ognition.LiDARsystemrequiresgeometriccalibration(GC)andradiometriccorrection(RC
5、)inordertomaximizethebenefitfromthecollectedLiDARdata.ThispaperevaluatestheimpactoftheGCandtheKeywords:RCoftheLiDARdataonlandcoverclassification.Theprocedureincludestheuseofaquasi-rigorousLiDARmethodfortheGCandtheradar(range)equationfortheRCoftheLiDARdata.Thegeometriccalib
6、rationGeometriccalibrationRadiometriccorrectionprocedureisusedtoadjustthecoordinatesofthepointcloudbyremovingtheimpactofbiasesintheIntensitydatasystemparametersaswellasderivingcorrectedrangesandscanangles(intheabsenceofthesystem’sClassificationrawmeasurements)fortheRCproc
7、ess.Thegeometricallycalibratedrangesandscananglesarethenusedtocorrecttheintensitydatafromtheatmosphericattenuationandbackgroundbackscatteringbasedontheradar(range)equation.Theatmosphericattenuation,whichhasnotbeenfullyaddressedinthepre-viousliterature,ismodeledbyconsider
8、ingtheparametersofabsorptionaswellasscatteringderivedfromexistingempiricalmodelsandpublic(free)molecula
