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基于点云数据的古建筑多层级BIM构建.docx

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基于点云数据的古建筑多层级BIM构建 1.Introduction Inrecentyears,theapplicationofbuildinginformationmodeling(BIM)inthearchitecturalfieldhasreceivedconsiderableattention.TraditionalBIMmodelingismainlybasedongeometricmodels,whichmaynotfullyreflectthedetailedinformationofhistoricalbuildingssuchastheircultural,socialandarchitecturalcharacteristics.Inordertoaddresstheselimitations,theBIMmodelingbasedonpointclouddatahasemergedasapromisingapproachtoimprovethedigitizationandpreservationofhistoricalbuildings. Inthispaper,wefocusonthemulti-levelBIMmodelingofhistoricalbuildingsbasedonpointclouddata.ThemotivationofthisresearchistoconstructacomprehensiveandaccurateBIMmodelofthehistoricalbuilding,whichisrequiredforvariousapplications,suchasconservation,restoration,planning,andmanagement.Weproposeamulti-levelBIMmodelingframeworkthatcancapturethedetailedinformationofthebuildingatdifferentlevelsofresolution.Inthefollowingsections,weintroducethebackground,challenges,andsolutionsofmulti-levelBIMmodelingbasedonpointclouddataforhistoricalbuildings. 2.Background Historicalbuildingsrepresentasignificantculturalheritagethatneedstobepreservedandmaintainedforfuturegenerations.Thesebuildingsoftenhavecomplexgeometries,high-leveldetails,andintricatedecorationsthatcannotbefullycapturedbytraditionalBIMmodelingmethods.Therefore,amoreadvancedapproachisneededtocreateanaccurateandcomprehensiveBIMmodelofthehistoricalbuilding. Pointclouddataisawidelyusedtechnologyforthedigitizationofphysicalobjectsandenvironments,includinghistoricalbuildings.Itisathree-dimensionalrepresentationofaphysicalobjectorscene,generatedbyscanningtheobjectusingalaserscannerorphotogrammetry.Pointclouddataprovidesahighlevelofdetailandaccuracy,makingitanidealsourceforBIMmodelingofhistoricalbuildings. 3.ChallengesandSolutions TheBIMmodelingofhistoricalbuildingsbasedonpointclouddatafacessomemajorchallengesduetothecomplexityofthebuildingandthelargeamountofdatagenerated.Thesechallengesinclude: 3.1.DataNoiseandInaccuracy Thepointclouddatageneratedbylase