资源描述：
《基于小波变换的车牌识别.docx》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、ISSN:2277-3754ISO9001:2008CertifiedInternationalJournalofEngineeringandInnovativeTechnology(IJEIT)Volume2,Issue5,November2012WaveletTransformBasedVehicleLicensePlateIdentificationDr.S.LKumar,K.VelusamyDr.V.VidyaDeviProfessorandHOD,MechanicalEngineering,
2、AssociateProfessor,MechanicalEngineering,Professor,ElectronicsandcommunicationEngineeringANNAIMATHAMMALSHEELAENGINEERINGCOLLEGEErumapatty,NamakkalDistrict-637013Tamilnadu,India.Abstract—Theadvancedtechnologydemandsnewmethodologytofulfillthehumanneed.Toa
3、voidthetheftinvehiclesteelingautomationandtestingisexpandingNumberplateisusedtoidentifythevehicle.AutomationisamustAutomaticNumberPlateRecognitionisidentifyingthevehicle.Theobjectiveistodesignanefficientautomaticauthorizedvehicleidentificationsystembyus
4、ingthevehiclenumberplate.Thesystemisimplementedontheentranceofahighlyrestrictedareasforsecuritye.g.Parliament,militaryzones,SupremeCourtetc.Inthisstudy,asimplealgorithmispresentedforvehicle’slicenseplaterecognitionsystem.IndexTerms—NumberPlateRecognitio
5、n,OpticalCharacterRecognition.VehicleIdentification,WaveletTransform.I.INTRODUCTIONTherearemanywaystoDecompositionofasignalintoconstituentparts.Someare:Fourierseries:harmonicsinusoids,singleintegerindexFouriertransform(FT),nonharmonicsinusoids,singlerea
6、lindexWalshdecomposition:―harmonic‖squarewaves,singleintegerindexKarhunen-Loevedecomposition,eigenfunctionsofcovariance;singlerealindexShort-TimeFT(STFT):windowed,nonharmonicsinusoids;doubleindexprovidestime-frequencyviewpointFTOnlyGiveswhatFrequencyCom
7、ponentsExistintheSignalnTheTimeandFrequencyInformationcannotbeSeenattheSameTimenTime-frequencyRepresentationoftheSignalisNeededbutWaveletTransformistime-compactedwaves,doubleindex,providestime-frequencyviewDecomposessignalintermsofduration-limited,band-
8、passcomponentshigh-frequencycomponentsareshort-duration,wide-band,low-frequencycomponentsarelonger-duration,narrow-bandcanprovidecomboofgoodtime-frequencylocalizationandorthogonallyButtheSTFTcan‘tdothis.Moreprecisely,waveletsgive
