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1、基于马耳可夫链的车牌识别（LicenseplaterecognitionbasedonMarkovchain）Articlenumber:1007-2276(2001)02-0102-06AutomaticlicenseplaterecognitionbasedonHiddenMarkovmodelChenYouren,ZhaoZhengxiao(Instituteofimageprocessingandpatternrecognition,ShanghaiJiaoTongUniversity,Shanghai200030)Abstract:inthispaper,
2、anewmethodoflicenseplatecharacterrecognitionisproposed,andthetwo-dimensionalhiddenMarkovmodelisusedtorecognizetheHanintheplateThepseudo-two-dimensionalhiddenMarkovmodel(P2D-HMM)isusedtorecognizethecharactersinthelicenseplateandtheArabianumeral.ThealgorithmisapplicableIndifferentcharact
3、ersize,charactertilt,foulingandsoon,theabilitytoresistnoiseisstrong.Thecorrectrateofcharacterrecognitionisover94%Technicalrequirements.Keywords:intelligenttransportation;licenseplaterecognition;hiddenMarkovmodelCLCnumber:TP391,documentidentificationcode:BAutomatic,recognition,of,vehicl
4、e,licenseBased,on,hidden,Markov,modelCHENYou-renZHAOZheng-xiao(Institute,of,Image,Processing&Pattern,Recognition,Shanghai,Jiaotong,University,Shanhai,200030,China)Abstract:In,this,paper,a,newalgorithmto,recognize,characters,in,vehicle,license,,plate,based,on,hiddenMarkov,model(HMM),is,
5、presented.,the,method,two-dimensional,hiddenMarkovmodel(2D-HMM),is,In,usedTo,recognize,Chinese,characters,and,pseudotwo-dimensional,hiddenMarkovmodel(P2D-HMM),is,used,to,rec-Ognize,English,characters,and,numbers.,is,proved,thatthis,algorithm,It,can,be,used,,to,recognize,varisized,char-
6、Acters,with,high,tolerance,to,and,blur,and,its,character,recognition,accuracy,distortion,is,above,,94%.,It,canBe,put,into,practical,use.Keywords:Intelligenttraffic;Vehiclelicenserecognition;hiddenMarkovmodel1IntroductionWiththedevelopmentofmoderntraffic,moreandmorecountriesattachimport
7、ancetotheintelligenttransportationsystem.TheautomaticlicenseplaterecognitioniscomputervisionandpatternrecognitiontechnologyOneoftheresearchsubjectsinthefieldofintelligenttransportation.Automaticlicenseplaterecognitiontechnologyincludestwokeytechnologies:licenseplatelocationandcharact
