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1、ResearchHighPerformanceStructures:BuildingStructuresandMaterials—ReviewAdvancesinComputerVision-BasedCivilInfrastructureInspectionandMonitoringBillieF.SpencerJr.a,*,VedhusHoskerea,b,YasutakaNarazakiaaDepartmentofCivilandEnvironmentalEngineering,UniversityofIllinoisatUrbana-Champaign,Urba
2、na,IL61801-2352,USAbDepartmentofComputerScience,UniversityofIllinoisatUrbana-Champaign,Urbana,IL61801-2302,USA*Correspondingauthor.E-mailaddress:bfs@illinois.edu(B.F.SpencerJr.)ARTICLEINFOArticlehistory:Received02August2018Revised13October2018Accepted14November2018AvailableonlineKeywords
3、:StructuralinspectionandmonitoringArtificialintelligenceComputervisionMachinelearningOpticalflowABSTRACTComputervisiontechniques,inconjunctionwithacquisitionthroughremotecamerasandunmannedaerialvehicles(UAVs),offerpromisingnon-contactsolutionstocivilinfrastructureconditionassessment.Theu
4、ltimategoalofsuchasystemistoautomaticallyandrobustlyconverttheimageorvideodataintoactionableinformation.Thispaperprovidesanoverviewofrecentadvancesincomputervisiontechniquesastheyapplytotheproblemofcivilinfrastructureconditionassessment.Inparticular,relevantresearchinthefieldsofcomputerv
5、ision,machinelearning,andstructuralengineeringarepresented.Theworkreviewedisclassifiedintotwotypes:inspectionapplicationsandmonitoringapplications.Theinspectionapplicationsreviewedincludeidentifyingcontextsuchasstructuralcomponents,characterizinglocalandglobalvisibledamage,anddetectingch
6、angesfromareferenceimage.Themonitoringapplicationsdiscussedincludestaticmeasurementofstrainanddisplacement,aswellasdynamicmeasurementofdisplacementformodalanalysis.Subsequently,someofthekeychallengesthatpersisttowardsthegoalofautomatedvision-basedcivilinfrastructureandmonitoringarepresen
7、ted.Thepaperconcludeswithongoingworkaimedataddressingsomeofthesestatedchallenges.1.IntroductionMuchofthecriticalinfrastructurethatservessocietytoday,includingbridges,dams,highways,lifelinesystems,andbuildings,waserectedseveraldecadesagoandiswellpastitsdesignlife.Forexampl