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ID:37394436
大小:7.44 MB
页数:61页
时间:2019-05-23
《基于视频监控的车速检测算法研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、广东工业大学硕士学位论文基于视频监控的车速检测算法研究姓名:唐国侠申请学位级别:硕士专业:信号与信息处理指导教师:李扬20080501广东工业大学工学硕士论文AbstractWiththerapiddevelopmentofsocietyandeconomy,thetrafficsystembecomesmoreandmorecomplex.Inordertoprovideallkindsofreal—timetrafficinformationtothemanagementoftrafficsystemforachievingefficientmanagementandmakin
2、gfulluseofthetrafficsystem,thestudyonreal—timetrafficinformationcollectionsystembasedonvideoimageprocessinghasbeenbecomingafocus.Asanimportantsubsystemofreal-timetrafficinformationcollectionsystem,thepapermakestherunningspeedofvehiclesasthestudyinganddetectingobjectandmainlystudiesonthedetecti
3、ngalgorithmsofreal-timespeedandotherrelatedones.Thepurposeofthissubjectistoimprovethedetectingmethodsofreal-timespeedandprovidemoreefficientreferencestoincreasetheautomaticandmodernizingtrafficmanagementlevels.Thispaperfocusesondevelopingaflexibleandreliablesystemtodetectthereal—timespeedofthe
4、trafficflowparametersthroughimagesequences.Thevehicledetectionisbasedontheroadway,whichsetsavirtuallineandavirtual-looparea,liketheinductiveloopsensor,todetectthetrafficflowparameters.Thekeyideaofthesystemisconvertingthe2-dimensionaldigitalimageto1-dimensionaldetectionsignalbyvirtualdetectionl
5、inepreprocessing,whichreducescomputationload.Thetraitofthismethodisonlyprocessinglittleimageareawithinvirtuallineorvirtual-loopandavoidingvehicletrackingin2-dimensionalimage,hencethetimecostofcalculationandthecomputationburthenisrecuced.Analgorithmwhichisusedtoestimatethetranslationofamovingob
6、jectinspatialdomainaccordingtoitsFouriertransformspectrumisalsoproposedinthepaper.BasedonshifttheoremofFouriertransformandauto—registration,thealgorithmdirectlyestimatesthetranslation、jl,iththephasespectrumdifferencebetweencontinuousimagesofamovingobjectinpolarcoordinatesystem.Vehiclevelocityu
7、=s/At(whereSisthedisplacementofvehicleandAtistheintervalbetweentwocontinuousimages)iscalculatedcorresponding.ItcangivetheIIAbs订actdisplacementofamovingtargetwitharesolutionlessthan1pixel,henceitcanbeusedtomeasurevehiclevelocity谢tll11i曲p
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