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基于圆柱多段拟合的隧道中轴线提取方法研究为题目,写不少于1200的论文 Abstract Theextractionofthetunnelcenterlineisanimportanttaskintunnelengineering.Inthispaper,amethodforextractingthetunnelcenterlinebasedoncylindricalmultisegmentfittingisproposed.Thismethodcaneffectivelyandaccuratelyextractthecenterlineofthetunnelbytakingintoaccountthecharacteristicsofthetunnelandthecurvatureofthetunnelaxis.Firstly,thepointclouddataofthetunnelispreprocessedtoremovenoiseandoutliers.Then,theroughcenterlineofthetunnelisextractedbasedontheleastsquaresfittingalgorithm.Finally,thecylindricalmultisegmentfittingalgorithmisusedtorefinethecenterline,andthefinalresultisobtainedbyoptimizingthefittingparameters. Keywords:tunnelcenterline,cylindricalmultisegmentfitting,leastsquaresfitting,pointclouddata Introduction Thetunnelcenterlineisthemostimportantcomponentintunnelengineering,asitdirectlyaffectsthesafetyandcostoftunnelconstruction.Accurateextractionofthetunnelcenterlinecanprovideimportantsupportfortunnelconstruction,operation,andmaintenance.Withthedevelopmentoflaserscanningtechnologyandphotogrammetrytechnology,thecollectionoftunnelpointclouddatahasbecomemoreandmoreefficientandaccurate.However,theefficientandaccurateextractionofthetunnelcenterlinefromthelargeamountofpointclouddatahasbecomeachallenge. Severalmethodshavebeenproposedfortheextractionoftunnelcenterline.Thesemethodscanbebroadlycategorizedintothreetypes:single-linefittingmethods,multiple-linefittingmethods,andcurvedsurfacefittingmethods.Single-linefittingmethodsaresimpleandefficient,buttheiraccuracyislimited.Multiple-linefittingmethodsaremoreaccuratethansingle-linefittingmethods,buttheyaremorecomplexandinefficient.Curvedsurfacefittingmethodscanaccuratelyextractthecenterlineofthetunnel,buttheyrequiremorecomputationalresourcesandaremorecomplextoimplement. Inthispaper,weproposeamethodforextractingthetunnelcenterlinebasedoncylindricalmultisegmentfitting.Themethodtakesintoaccountthecharacteristicsofthetunnelandthecurvatureofthetunnelaxis,andcaneffectivelyandaccuratelye