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1、北京联合大学毕业设计（论文）外文原文及译文题目：午牌识别及MATLAB的介绍章学静陈竞I员I2009080403104林本心专业：电了工程指导教师:学院：电了系学号:班级：200908040301姓名:LPRandMATLABsoftwareisintroducedAutomaticlicenseplaterecognition(LPR)hasbeenapracticaltechniqueinthepastdecades・Numerousapplications,suchasautomatictollcollection,cri
2、minalpursuitandtrafficlawenforcement,havebeenbenefitedfromit・Althoughsomenoveltechniques,forexampleRFID(radiofrequencyidentification),WSN(wirelesssensornetwork),etc.,havebeenproposedforcarIDidentification,LPRonimagedataisstillanindispensabletechniqueincurrentintellig
3、enttransportationsystemsforitsconvenienceandlowcost・LPRisgenerallydividedintothreesteps:licenseplatedetection,charactersegmentationandcharacterrecognition.ThedetectionsteproughlyclassifiesLPandnon-LPregions,thesegmentationstepseparatesthesymbols/charactersfromeachoth
4、erinoneLPsothatonlyaccurateoutlineofeachimageblockofcharactersisleftfortherecognition,andtherecognitionstepfinallyconvertsgreylevelimageblockintocharacters/symbolsbypredefinedrecognitionmodels.AlthoughLPRtechniquehasalongresearchhistory,itisstilldrivenforwardbyvariou
5、sarisingdemands,themostfrequentoneofwhichisthevariationofLPstyles,forexample:(1)Appearancevariationcausedbythechangeofimagecapturingconditions・(2)Stylevariationfromonenationtoanother・(3)StylevariationwhenthegovernmentreleasesnewLPformat.Wesummedthemupintofourfactors,
6、namelyrotationangle,linenumber,charactertypeandformat,aftercomprehensiveanalysesofmulti-styleLPcharacteristicsonrealdata.Generallyspeaking,anychangeoftheabovefourfactorscanresultinthechangeofLPstyleorappearanceandthenaffectthedetection,segmentationorrecognitionalgori
7、thms.IfoneLPhasalargerotationangle,thesegmentationandrecognitionalgorithmsforhorizontalLPmaynotwork.IftherearemorethanonecharacterlinesinoneLP,additionallineseparationalgorithmisneededbeforeasegmentationprocess.Withthevariationofcharactertypeswhenweapplythemethodfrom
8、onenationtoanother,theabilitytore-definetherecognitionmodelsisneeded.Whatismore,thechangeofLPstylesrequiresthemethodtoadjustbyitsel
