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ID:32228061
大小:1.27 MB
页数:43页
时间:2019-02-01
《不停车收费系统中的车牌识别技术的研究》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、AbstractTheEYC(electronictollcollection)systemisanimportantbranchoftheIntelligentTransportationSystem.ItinvolvesthecallbackofinvestmentintransDortationconstruction;anditCanalleviatetrafficjamintollstation.Therefore,ETCsystemsarebeingdevelopedinmanycountriesastheear
2、liestapplicationinITS.ImageProcessingtechnologiesareintroducedinthispapertoimprovethefunctionsoftheETCsystem.KeytechnologiessuchasImageProcessingandPatternRecognitionareintensivelystudiedinthispaper.NumberPlateRecognitionismainlystudiedinthispaper,whichincludesfour
3、paas:ImagePreprocessing,NumberPlateLocation,CharacterSeglnentationandCharacterRecognition.Alloftheorientationalgorithmswhichwerecommonuseddealwithallthedataintheimage,butthatcarl’tmeettheneedofreal—timeinreal.timetrafficflow.Theorientationalgorithmgiveninthispaperc
4、andecreaseoperationtimesharply.Thesegmentationmethodswhichwerecommonused,suchasprojectionmethodandclusteringmethod,areliabletOtheinterferenceofcharacters’conglutination,thesegmentationmethodproposedinthispaperCansolvethisproblem.Inregardtothedeformedcharactersofthe
5、licenseplateandthevadedillurninationandnoisedisturbanceconditions,acharacterrecognitionmethodbasedonextendedone-classSVMisputforwardinthispaper,whichhasmanymerits,suchashi曲lyanti—interferencequality,hi豇lyrecognitionrate.Thedetailsinthispaperareasfollow:1.ImagePrepr
6、ocessing:someimageprocessingalgorithmsemployedinthispaper,includinggradtransform,differenceofimage,binarizationofimage,Houghtransform.areintroducedindetail.2.NumberPlateLocation:Firstly,aroughlocationschemebasedonscanninghorizontallyisproposed;thenanaccuratelylocat
7、ionschemebasedOffprescientknowledgeandtemplatematchingisproposed.3,CharacterSegmentation:Firstly,agradientNumberPlatecheckingmethodbasedonthechangingfrequencyofthenumberofjumpingdotsonhorizontalscanninglineisproposed;thenamethodbasedonhorizontalscanningisproposedtO
8、locatethetopandbottomboundaryofthecharacterstring;andthenthetemplateofcharacterstringonNumberPlateisdesignedbasedonthecharactel‘strings’IJstructu
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