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1、MahboubehShamsi,PutehBtSaad,SubariahBtIbrahim,WSEASTRANSACTIONSonCOMPUTERSAbdolrezaRasouli,NazeemaBtAbdulrahimANewAccurateTechniqueforIrisBoundaryDetectionMAHBOUBEHSHAMSI,PUTEHBTSAAD,SUBARIAHBTIBRAHIM,ABDOLREZARASOULI,NAZEEMABTABDULRAHIMFacultyofComputerScience&Informati
2、onSystemUniversityTechnologyMalaysiaSkudai,Johor,Malaysia-81310mahboubehshamsi@yahoo.com,drputeh@gmail.com,subariah@utm.my,rs.reza@gmail.com,iema_830619@yahoo.comAbstract:-TheIrisbasedidentificationsystemshavebeennoticedexceedingly,presently.Inthisprocess,theirisshouldbe
3、segmentedfromcapturedeyeimage.Thelowcontrastbetweenpupilandiris,usually,willhardenthesegmentingprocessandwilldecreasetheaccuracyofdetectingboundarybetweenthem.Inordertosegmenttheirismoreprecise,weproposeanewtechniqueusingadifferencefunctionandafactormatrix.Wealsomodifyth
4、esegmentationoperatortodetectthepupilandirisasellipseinsteadofcircle.Experimentsshowthattheproposedtechniquecansegmenttheirisregionandpupilregionprecisely.Basedonourresult,99.34%ofeyeshavebeensegmentedaccuratelyin1.24saveragely.Key-Words:-Daugman’smethod,AverageSquareShr
5、inking,DifferenceFunction,ContourFactorMatrix1Introductiontexturecontourcontrastbetweenthetworegions.IrisisthemostreliablebiometricinsecureHowever,thereisalowertexturecontrastbetweentransactionproposals.Irisinaneyeimageisirisregionandpupilregion.Hence,itisdifficulttositu
6、atedbetweenscleraandpupil.Beforeiriscanbeautomaticallydetecttheedgebetweenirisandpupilutilizedforaspecificapplication,ithastobe[1].localizedfirst.IrislocalizationisachallengingDaugman[2]usesadifferentialoperatorforordealduetoseveralreasonssuchasocclusionstolocatingthecir
7、culariris,pupilregionsandthearcsthepresenceofeyelidsandeyebrowsandalsodueoftheupperandlowereyelids.Thedifferentialtotheuneventexturalcontrast.Thetexturalcontrastoperatorisdefinedasbetweenscleraandirisishigh;converselythe∂I()x,ytexturecontrastbetweenirisandpupilislow.Them
8、axGδ()r∗∂∫r,xo,y0πrds(1)problemisfurtheraggravatedwiththepresenceof()r,x0,y0r2lightreflectioninthepupil
