基于BP神經(jīng)網(wǎng)絡(luò)的車輛車牌識別系統(tǒng)的研究與實現(xiàn).pdf

1、分類號密級UDC學(xué)位論文基于BP神經(jīng)網(wǎng)絡(luò)的車輛車牌識別系統(tǒng)的研究與實現(xiàn)(題名和副題名)黃衛(wèi)華(作者姓名)指導(dǎo)教師姓名陳文宇副教授電子科技大學(xué)成都(職務(wù)、職稱、學(xué)位、單位名稱及地址)中請專業(yè)學(xué)位級別碩士專業(yè)名稱軟件工程論文提交日期2008.3論文答辯日期2008.5學(xué)位授予單位和日期電子科技大學(xué)答辯委員會土席評閱人2008年月日注l:注明《國際十進(jìn)分類法UDC》的類號。ABSTRACTABSTRACTTheLieensePlateReeo

2、gnition(LPR)systembecomesanimportantP叭ofhitelligentTrafficSystem(ITS)withther叩iddevelopmentofcomputerscienceariddigital加ageProeessing.LPRtechnologyeanusedinmanyfieldstoimProvemanagement，5automationgrade，suchaseleetrongin

3、g，PasseontrollingautomobilestreamSuPe1Tisingetc.MoreandmorePcoPleareataehingimptancetoitsint盯elatedteelmologyStudy.TheessentialtechnologyofLPRsystemliesinthedigitalimagePretreatmenttechnology，thePlateloeationtechnologyth

4、ePlateeharaeterrecognitionteelmology.ThisPaPerdiscussedaLPRsystemwhichaPPliesthecomPuterimageProeessingtechnology，thelieenseloeationtechnology，theeharacterdivisiontechnology，thelieenseacterrecognitionteehnologybasedonBPN

5、euralNetwkW0rks.垅hielelieensePlateloeation(LPL)acterseglnentationtechniquesarekeyteehnologiesofthevehielelieensePlatereeognitionsystern.InthisPaperanewarithmetieofPerpendieularedgedeteetionworksonlicensePlatelocation，aee

6、ordingtogeometriealfeaturesofPerpendicularedgewhiehbelongtolieensePlatecharacteristies.Fromtheimage，iteanconfirmthelikelihoodlieensePlateinquireelectaldistrictwithedgedetection.T七inkabouttheeharaetersgoometricalshaPe，wef

7、ilterthelicensePlateinquireeleetaldistriet，andloeatethelieensePlateloeation.Finall蘇thecharacteranglesareerectedbyHoughtransfmation，theaeter15seglllentedbyseglnentationalgorithm.LOeationandseglllentationProblemsaresolvede

8、ffeetivelyundercomPlexseenes.ThisPaPerdiseusstheneuralnetwkandrelatedtheies，whichfocusesonanalysisoftheneuralnetwksinCharaeterReeognitionapPlieation，thedesignofBPneuralnetwkelassifiersandextraetionofthelieensePlatecharac

9、ters.AllthecharacteristiesoftheeharimageareinPuttoBPnetwkandtheoutPutofBPwk15eodedbybinaryeode.HiddenlayernodesareidentifiedbytheinitialuseofhiddennodesinemPiriealfmula.Allofthisgreatlyredueethenumberofiterationsandthesi