Vehicle License Plate Detection and Characters Recognition

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1、硕士留学生学位论文VehicleLicensePlateDetectionandCharactersRecognition作者姓名MUHAMMADSALMANInformationandCommunication学科专业Engineering指导教师Prof.YangJunMeiElectronicandInformation所在学院Engineering论文提交日期2018–06-21VehicleLicensePlateDetectionandCharactersRecognitionADissertationSubmittedfor

2、theDegreeofMasterCandidate：MuhammadSalmanSupervisor：Prof.YangJunMeiSouthChinaUniversityofTechnologyGuangzhou,China分类号：TP393学校代号：10561学号：201622856334华南理工大学硕士学位论文VehicleLicensePlateDetectionandCharactersRecognition作者姓名：MUHAMMADSALMAN指导教师姓名、：Prof.YangJunMei申请学位级别：学科专业名称：Info

3、rmationandCommunicationEngineering研究方向：论文提交日期：2018年05月27日论文答辩日期：2018年06月02日学位授予单位：华南理工大学学位授予日期：年月日答辩委员会成员：主席：委员：ABSTRACTAutomaticlicenseplaterecognition(ALPR)isimageprocessingtechnologyandhotresearchareainintelligenttransportationsystemanditshowsasignificantroleinmanyappl

4、ications.InALPRsystemlicenseplatedetectionfromtheoriginalimageisthemostimportantphase.Itisverychallengingbecauseofthevarietyofplatelayoutsandthenon-uniformoutsidelightingconditionsduringimageacquisition.Imageprocessingtechniqueiswidelyusedforlicenseplatedetection.Averityo

5、ftechniquesisproposedintheliteraturebuttheyarehavingaccuracyproblems.Inthiswork,wedevelopalicenseplatedetectionmethodusingaKNN(K-nearestneighbor)classifierwithcontour.Thesystemfindsallpossiblecontourintheimageandperformsroughcharactersearchingatdifferentscalesandanalysest

6、hecontourwidth,height,andareatotakearoughideawhetherthecontourcanbeacharacterornot.Theresultsofourapproachshowthatthismethodiscomparativelyimperviousto:1)variationsinlighting,2)licenseplateshapes,3)cameraperspective,4)shadowimagesand5)backgroundvariations.Thesystemisteste

7、dwithon150realtimeimages,capturedincampuspremisesandimagesdownloadedfrominternetunderdifferentilluminationconditionsandwegot96%results.Afterthelocalizationoflicenseplates,thealignmentofplatesiscarriedout.Basically,thisalignmenttechniquefindstheneighboroftheboundingboxofth

8、edetectedareaandfindouttheidealedgesitewheretheouterregionisquitedifferentfromtheinnerregionofth