PAGE2虹膜識別外文翻譯文獻虹膜識別外文翻譯文獻(文檔含中英文對照即英文原文和中文翻譯)外文：Thefirstchapter1.1TheresearchbackgroundofirisrecognitionBiometricsisatechnologyforpersonalidentificationusingphysiologicalcharacteristicsandbehaviorcharacteristicsinherentinthehumanbody.Canbeusedforthebiologicalcharacteristicsofbiologicalrecognition,fingerprint,handtypeface,iris,retina,pulse,earetc..Behaviorhasthefollowingcharacteristics:signature,voice,gait,etc..Basedonthesecharacteristics,ithasbeenthedevelopmentofhandshaperecognition,fingerprintrecognition,facialrecognition,irisrecognition,signaturerecognitionandotherbiometrictechnology,manytechniqueshavebeenformedandmaturetoapplicationof.

Biologicalrecognitiontechnologyina,hasalonghistory,theancientEgyptiansthroughidentificationofeachpartofthebodysizemeasuretocarryoutidentitymaybetheearliesthumanbasedontheearliesthistoryofbiometrics.ButthemodernbiologicalrecognitiontechnologybeganintwentiethCentury70timemetaphase,asbiometricdevicesearlyisrelativelyexpensive,soonlyahighersecuritylevelatomictest,productionbase.duetodecliningcostofmicroprocessorandvariouselectroniccomponents,precisiongraduallyimprove,controldeviceofabiologicalrecognitiontechnologyhasbeengraduallyappliedtocommerceauthorized,suchasaccesscontrol,attendancemanagement,managementsystem,safetycertificationfieldetc..

Allbiometrictechnology,irisrecognitioniscurrentlyusedasaconvenientandaccurate.Makingtwenty-firstCenturyisinformationtechnology,networktechnologyofthecentury,isalsothehumangetridoftraditionaltechnology,moreandmorefreedomofthecentury.Intheinformation,freeforthecharacteristicsofthecentury,biometricauthenticationtechnology,high-techastheendofthetwentiethCenturybegantoflourish,willplayamoreandmoreimportantroleinsociallife,fundamentallychangethehumanwayoflife.Characteristicsoftheiris,fingerprint,DNAthebodyitself,willgraduallyexistingpassword,key,becomepeoplelifestyle,insteadofatthesametime,personaldatatoensuremaximumsafety,maximizethepreventionofvarioustypesofcrime,economiccrime.

Irisrecognitiontechnology,becauseofitsuniqueintermsofacquisition,accuracyandotheradvantages,willbecomethemainstreamofbiometricauthenticationtechnologyinthefuturesociety.Applicationofsafetycontrol,thecustomsimportandexportinspection,e-commerceandotherfieldsinthefuture,isalsoinevitableinirisrecognitiontechnologyasthefocus.Thistrend,nowinvariousapplicationsaroundtheworldbegantoappearinthe.1.2ObjectiveandsignificanceofirisrecognitionIrisrecognitiontechnologyrisinginrecentyears,becauseofitsstrongadvantagesandpotentialcommercialvalue,drivenbysomeinternationalcompaniesandinstitutionshaveinvestedalotofmanpower,financialresourcesandenergyresearch.TheconceptofautomaticirisidentificationisfirstproposedbyFrown,thenDaugmanforthefirsttimeinthealgorithmbecomesfeasible.

Theirisisacoloredringinthepupilintheeyeoffabricshape,eachiriscontainsastructureliketheoneandonlybasedonthecrown,crystalline,filaments,spots,structure,concavepoint,ray,wrinklesandfringecharacteristic.Theirisisdifferentfromtheretina,retinalislocatedinthefundus,difficulttoimage,iriscanbeseendirectly,biometricidentificationtechnologycanobtaintheimageofirisfinewithcameraequipmentbasedonthefollowingbasis:Irisfibroustissuedetailsisrichandcomplicated,andtheformationandembryonictissueofirisdetailstheoccurrencestageoftheenvironment,havegreatrandomthe.Theinherentcharacteristicsofiristissueisdifferfrommantoman,evenidenticaltwins,thereisnorealpossibilityofcharacteristicsofthesame.

Whentheirisarefullydeveloped,hechangesinpeople'slifeandtiny.Intheirisouter,withalayeroftransparentcornealitisseparatedfromtheoutsideworld.Somatureirislesssusceptibletoexternaldamageandchange.

Thesecharacteristicsoftheirishastheadvantages,theirisimageacquisition,thehumaneyeisnotindirectcontactwithCCD,CMOSandotherlightsensor,usesanontechnologyacquisitioninvasion.So,asanimportantbiometricidentityverificationsystem,irisrecognitionbyvirtueoftheiristextureinformation,stability,uniquenessandnonaggressive,moreandmoreattentionfrombothacademicandindustrialcircles.1.3StatusandapplicationofdomesticandforeignresearchonirisrecognitionIDC(InternationalDataGroup)statisticsshowthat:bytheendof2003,theglobalirisrecognitiontechnologyandrelatedproductsmarketcapacitywillreachthelevelof$2000000000.PredictedconservedsurveyChinabiometricauthenticationcenter:inthenext5years,onlyintheChinese,irisrecognitioninthemarketamountedto4000000000rmb.Withtheexpansionofapplicationoftheirisrecognitiontechnology,andtheapplicationintheelectroniccommercedomain,thisnumberwillexpandtohundredsofbillions.

ThedevelopmentofirisrecognitioncanbetracedbacktonineteenthCentury80's..In1885,ALPHONSEBERTILLONwillusethecriminalprisonthoughtsoftheapplicationofbiometricsindividualinParis,includingbiologicalcharacteristicsforuseatthetime:thesizeoftheears,feetinlength,iris.

In1987,ARANSAFIRandLEONARDFLOMDepartmentofOphthalmologyexpertsfirstproposedtheconcept,theuseofautomaticirisrecognitionirisimagein1991,USALosalaMossNationalLaboratoryJOHNSONrealizedanautomaticirisrecognitionsystem.

In1993,JOHNDAUGMANtoachieveahighperformanceautomaticirisrecognitionsystem.

In1997,thefirstpatentChineseirisrecognitionisapproved,theapplicant,WangJiesheng.

In2005,theChineseAcademyofSciencesInstituteofautomation,NationalLaboratoryofpatternrecognition,becauseofoutstandingachievement"inrecognitionof"irisimageacquisitionandaspects,wonthetwo"NationalTechnologyInventionPrize",thehighestlevelrepresentsthedevelopmentofirisrecognitiontechnologyinchina.

In2007November,"requirementsforinformationsecuritytechnologyinirisrecognitionsystem"(GB/T20979-2007)nationalstandardspromulgatedandimplemented,thedraftingunit:BeijingarithenInformationTechnologyCo.,ltd..

Applicationofsafetycontrol,thecustomsimportandexportinspection,e-commerceandotherfieldsinthefuture,isalsoinevitableinirisrecognitiontechnologyasthefocus.Thistrend,nowinvariousapplicationsaroundtheworldbegantoappearinthe.Inforeigncountries,irisrecognitionproductshavebeenappliedinawiderange.

InFebruary8,2002,theBritishHeathrowAirportbegantotestanadvancedsecuritysystem,thenewsystemcanscanthepassenger'seyes,insteadoftocheckpassports.Itisreported,thepilotschemeforaperiodoffivemonths,aBritishAirwaysandvirginAirlinespassengerscanparticipateinthistest.TheInternationalAirTransportAssociationinterestedintheresultsofthisstudyare,theyencouragetheHeathrowAirporttotest,throughtheirisboardingpassengerstodetermineitsidentityasaboardingpass.

IrisrecognitionsystemAmerica"Iriscan"developedhasbeenappliedinthethreebusinessdepartmentofUnionBankofAmericanTexaswithin.Depositorstobeleftwithnothingwhatsoevertobanking,nobankcardpassword,nomorememoriestrouble.TheygetmoneyfromtheATM,acamerafirsteyeoftheusertoscan,andthenscantheimageintodigitalinformationanddatacheck,checktheuser'sidentity.

AmericaPlumstedschoolinNewJerseyhasbeeninthecampusinstalleddeviceofirisrecognitionforsecuritycontrolofanyschool,studentsandstaffarenolongerusecardsandcertificatesofanykind,aslongastheypassedintheiriscamerabefore,theirlocation,identityissystemidentification,allforeignworkersmustbeirisdataloggingtoenterthecampus.Atthesametime,throughthecentralloginandaccesscontrolsystemtocarryonthecontroltoenterthescopeofactivities.Aftertheinstallationofthesystem,variouscampusinviolationofrulesandinfringement,criminalactivityisgreatlyreduced,greatlyreducingthecampusmanagementdifficulty.

InAfghanistan,theUnitedNations(UN)andtheUnitedNationsUSAfederalagencyrefugeeagency(UNHCR)usingirisrecognitionsystemidentificationofrefugees,topreventthesamerefugeemultiplereceivereliefgoods.UsethesamesysteminrefugeecampsinPakistanandAfghanistan.Atotalofmorethan2000000refugeesuseirisrecognitionsystem,thissystemtoakeyrolefortheUnitedNationsfordistributionofhumanitarianaidfrom.

InMarch18,2003,AbuZabi(oneoftheArabiaandtheUnitedArabEmirates)announcedtheirisrecognitiontechnologyforexpelledforeignersiristrackingandcontrolsystembasedonthebordersopenedtheworld'sfirstsetofnationallevel,thissystembeganconstructionfrom2001,itspurposeistopreventallexpelledbyAbuZabitouristsandotherpersonneltoentertheAbuZabi.Withoutthissysteminthepast,duetotheuniquecharacteristicsofthesurfaceoftheArabs(HuXuduo),andthenumberoftheexpulsionofthenumerous,customsinspectionstaffisverydifficulttodistinguishbetweenwhatisadeportedperson.Byusingthissystem,illegalimmigration,allbeavoided,themaximumguaranteeofnationalsecurity.

KennedyInternationalAirportinNewJerseystate(JohnF.KennedyInternationalAirport)oftheirisrecognitionsysteminstalledonitsinternationalflightsfourthboardingport,300ofall1300employeeshavealreadystartedtousethesystemlogincontrol.Byusingthissystem,allcanentertotheapronpersonnelmustbeafterthesystemsafetycertificationofpersonnel.Unauthorizedwanttobreakthrough,thesystemwillautomaticallytakeemergencymeasurestotrytoforcethroughpersonnelclosedintheguardspace.Usingthissystem,thesafetygradeKennedyInternationalAirportrosefromB+toA+grade.TheKennedyInternationalAirporttotraveltootherpartsofthepassengershasincreasedby18.7%.

Generallyspeaking,theirisrecognitiontechnologyhasalreadybeguninallwalksoflifeinvariousformsofapplicationintheworld.Atthesametime,totheapplicationoftheirunitsofallhadseenandwhatsortsofsocialbenefitsandeconomicbenefitsarenotsee.Thistrendistoenhancethehighspeed,thenext10yearswillbegraduallyachievethecomprehensiveapplicationofirisrecognitionineachindustry.

InChina,duetotheChineseembargoandiristechnologyitselfandthedifficultyindomesticcannotdevelopproducts.Sofar,therehasnotbeenarealapplicationofirisrecognitionsystem.However,manydomesticunitsareexpressedusingstrongintention,especiallythe"9·11"later,securityantiterrorismconsciousnesshasbecomethemostconcernedproblemsinthefieldofaviation,finance.Irisrecognitionsystemisamajorairlinecompanies,majorfinancialinstitutionsandothersecuritymechanisms(suchasaerospacebureau)becomethefocusofattentionofobjectandotherkeynationalsecurityagency.Aswiththetrendofdevelopmentintheworld,irisrecognitiontechnologywillinthenearfutureinapplicationChinasetoffclimax.Thesecondchapterofintroductionofirisrecognitiontechnology2.1Technologyofbiologicalfeaturerecognitionbasedon2.1.1Presentstatusanddevelopmentofbiologicalfeaturerecognition“9.11"eventisanimportantturningpointinthedevelopmentofbiometricidentificationtechnologyintheworld,theimportanceofitmakesgovernmentsmoreclearlyawareofthebiologicalrecognitiontechnology.Traditionalidentityrecognitiontechnologiesinthefaceofdefectantiterrorismhasshown,thegovernmentbeganalarge-scaleinvestmentintheresearchandapplicationofbiometrictechnology.Atthesametime,thepublicunderstandingofbiologicalrecognitiontechnologywith"9.11"exposurerateandgreatlyimprovethe.

Thetraditionalmethodofindividualidentificationistheidentityofthepeoplewithknowledge,identityobjectsrecognition.Theso-calledidentity:knowledgereferstotheknowledgeandmemorysystemofpersonalidentification,cannotbestolen,andthesystemiseasytoinstall,butoncetheidentificationknowledgestolenorforgotten,theidentityofeasilybeingfakeorreplaced,thismethodatpresentinawiderangeofapplications.Forexample:theusernameandpassword.Theso-calledidentityitems:referstotheperson,masteritems.Althoughitisstableandreliable,butmainlydependontheouterbody,lostorstolenidentificationitemsonceproofofidentity,theidentityofeasilybeingfakeorreplaced,forexample:keys,certificates,magneticcard,ICcardetc..

Biometricidentificationtechnologyisrelatedtophysicalcharacteristics,someoneusingpriorrecordofbehavior,toconfirmwhetherthefacts.Biometricidentificationtechnologycanbewidelyusedinallfieldsofsociety.Forexample:acustomercameintothebank,hedidnottakebankcard,alsodidnotrememberthepassworddirectlydrawing,whenhewasdrawinginthedrawingmachine,acameratoscanonhiseyes,andthenquicklyandaccuratelycompletetheuseridentificationanddealwithbusiness.Thisistheapplicationoftheirisrecognitionsystemofmodernbiologicalidentificationtechnology."".

America"9.11"aftertheincident,theantiterroristactivityhasbecometheconsensusofgovernments,itisveryimportanttostrengthenthesecurityanddefensesecurityattheairport,someairportsUSAcaninthecrowdoutaface,whetherheIsitright?Wanted.Thisistheapplicationofmoderntechnologyinbiologicalfeaturerecognition"facialrecognitiontechnology".

Comparedwiththetraditionalmeansofidentityrecognition,biometricidentityrecognitiontechnologyingeneralhasthefollowingadvantages:

(1)thesecurityperformanceisgood,noteasytocounterfeitorstolen.

(2)carry,wheneverandwhereverpossible,thereforemoresafetyandsecurityandotheridentificationmethod.

Forthebiologicalinformationofbiometricrecognition,itsbasicnaturemustmeetthefollowingthreeconditions:universality,uniquenessandpermanency.

Theso-calleduniversality,referstoanyindividualhasthe.Uniqueness,isinadditiontootherthanhimself,otherpeopledidnothaveany,namelydifferent.Theso-calledpermanent,referstothecharacterdoesnotchangeovertime,namely,life-long.

Featureselectionoforganismswithmorethanthreeproperties,isthefirststepofbiologicalrecognition.

Inaddition,therearetwoimportantindexesinbiologicalrecognitiontechnology.Therejectionrateandrecognitionrate.Adjustingtherelationofthesetwovaluesisveryimportant.Therejectrate,theso-calledfalserejection,thisvalueishigh,usefrequencyislow,theerrorrecognition,itsvalueishigh,safetyisrelativelyreduced.Sointhebiologicalidentificationofanyadjustment,thetwoindexisacannotabandontheprocess.Thechoiceofrangesize,relatedtothebiologicalidentificationisfeasibleandavailable.

Andtechnologyofidentityrecognitionbasedonirisfeaturenowappears,itisthedevelopmentofbiometricidentificationtechnologyquickly,duetoitsuniqueness,stability,convenienceandreliability,sotheformationofbiometricidentificationtechnologyhastheprospectsfordevelopment.

Generallyspeaking,thebiologicalrecognitionsystemconsistsof4steps.Thefirststep,theimageacquisitionsystemofcollectingbiometricimage;thesecondstep,thebiologicalcharacteristicsofimagepreprocessing(location,normalization,imageenhancementandsoon);thethirdstep,featureinformationextraction,convertedintodigitalcode;thefourthstep,thegenerationoftestcodeanddatabasetemplatecodetocompare,makeidentification。2.1.2Currentlyseverallargebiologicalfeaturerecognitiontechnologythefingerprintrecognitiontechnology

Fingerprintidentificationtechnologyoriginallyusedincriminalfield,afterthetwentiethCentury,fingerprintrecognitiontechnologyhasbeenacceptedbythewholeworld.Atpresent,aroundtheworldhaveestablishedthefingerprintautomaticrecognitionsystemoffingerprintdatabaseandcrime.Thecriminalinvestigationunderstandingopportunitynow,fingerprintidentificationtechnologyhasbeenappliedinfacilitiesmanagementrequiresahighdegreeofsecurity,asthemosttraditional,biologicalfeaturerecognitionmethodisthemostmature.

Fingerprintidentificationisthefingerprintoftheruggedfingerendpositiveskintexture.Eachfingerprinttextureinthepattern,thebreakpointandcrosspointoneacharenotidentical,istheonly,andthesameforlife.Fingerprintcanbebroadlydividedintotwocategories:thegeneralfeaturesandlocalfeatures.Overallfeaturescanbedirectlyobservedwiththenakedeyegrainpattern:ring(loop),archtype(arch),spiraltype(whorl),namelywecommonlyknownasthebucket,dustpan,doubleskip.Butthosebasicpatternclassificationandrecognitionisstillfarfromenough.Inpracticalapplications,oftensomeonefingerprintextractionnodes(oftenappearintheinterrupt,fingerprintridgebifurcationorturning)thelocalfeatureinformation,identityauthentication.Informationfeaturesoffingerprintminutiaeofuptomorethan150,butsomedetailsareextremelyrare,thereare7typesofnodes:commonendpoint(alineendhere),bifurcationpoint(astripeonthesplitintotwoormorelines),bifurcationpoints(fromtwoparallellinesonthis),isolatedpoint(aspecialshortlines,sothatithasbecomeapoint(a),ringlinessplitintotwo,immediatelymergedintoone,aloopformed),shortlines(theshorterendbutdoesnotbecomeabitlines).Oneofthemosttypicalandthemostcommonlyusedistheendpointandbifurcationpoints,intheautomaticfingerprintidentificationtechnology,generallyonlytodetectthenumberofthesetwotypesofnodes,andcombinedwiththecurvatureposition,directionandregionallinesnode,getfingerprintfeatureonly.Thequalityoffingerprintrecognitionaccuracyandtheinputfingerprintimagehasaveryimportantrelationship.Duetonoise,unevencontactandotherreasons,mayleadtofingerprintimageacquisitionhasmanydistortion,deformation.Intheanalysisoffingerprint,featurealotofsuspiciouswillproduce,floodedtherealfeaturepoint,sothesmoothing,filtering,binarization,thinning,twoimageprocessingmethodstoimprovethegrainclarity,anddeletealotofnoisedamagearea.Fingerprintimageenhancementgenerallyusethefollowinglink,normalizing,orientationimageestimation,frequencyestimation,template,filter.

Fingerprintidentificationhasuniversality,uniqueness,permanenceandhighsecurityadvantages,thedevelopmentofthetechnologytothematureperiod,thefalserejectionrateandfalseacceptancerateofcompliance,evenonthepartoftheincompletefingerprintcanalsobeidentified,itisinsufficient,becausethefingerprintrecognitiontechnologyoriginallyusedinthefieldofcrimeinvestigation,somepeopleareafraidof"thefingerprintrecord".Inaddition,thebiologicalfeatureidentification,themostfundamentalisthecounterfeitingproblem,suchastheleftfingermarkuserfingerprint,andthesefingermarkisusedtocopythefingerprintcan.Facerecognitiontechnology

Facialrecognitiontechnologyanalyzesfaceimageswithcomputer,extractseffectiverecognitioninformationfrom,atechniqueusedto"identify"theidentity.Facialrecognitiontechnologythatiscausedbythestronginteresttoresearchersintheearly60'softhetwentiethCentury,somepriorknowledgebutearlyfacerecognitionrequirespeople.EnteredintwentiethCenturyafter90years,highperformancecomputer,facerecognitionmethodisamajorbreakthrough,toentertherealmachineautomaticrecognitionstage.

Comparedwithfingerprintrecognition,irisrecognition,facerecognitionismoredirectandfriendly,hasabroadapplicationprospectintheidentification,filemanagement,videoretrievaletc..Now,domesticandforeignhadtheautomaticfacerecognitionsystemoftheproduct,suchasaGermancompanydevelopedSiemens"andvisualaccesscontrolsystem(FaceVACS)",forthesecurityaccesscontrolsystem,therecognitionrateiscloseto100%.However,theaccuracyoffacerecognitioniseasilyaffectedbyillumination,pose,expression,occlusion,ageandotherfactors.

EngineeringfacialrecognitiontechnologyAmericanDoDhasshownthat:theimagecollectionandrecognitionintheconstraintconditionsofratecanreachmorethan95%,butinthenonrestraintenvironment,therecognitionratedroppedsharply.Therefore,wefromtheconstraintandnonrestraintenvironmenttwoapproachestothestudyoffacerecognition.

Facerecognitioninconstrainedenvironments,generallyfocusedon2Dfacialimagerecognitionstill.Themainresearchdirectionofresearchmethodsbasedonthewholeandtheresearchmethodbasedonfeatureanalysis.

Theoverallresearchapproachbasedonconsideringtheoverallattributeofthemodel,itnotonlypreservesthetopologyrelationbetweenfacecomponents,butalsoretainthecomponentitself,includingthecommonlyusedmethods:eigenfacemethod,SVDdecompositionmethod,matchingmethod,elasticgraphmatchingmethod,ahiddenMarkovmodelmethodandneuralnetworkanalysisoffacedensitycontouranalysis.

Methodbasedonfeatureanalysisispresentedthroughthelocalcontourinformationandgraylevelinformation,relativeratiosofthefacialreferencepointandotherfacefacialfeatureshapeeraserbookorcategoryparameterstogetherconstitutethefeaturevector.Basedonthefeaturevectorssuchaseyes,mouthandotherpartsandtheextractionof.

Facialrecognitionofunconstrainedenvironment,poseandilluminationvariationsisthemainfactoraffectingrecognition.Usuallyusesomespecialmethodstoimprovetherobustnessofsystemidentification.Suchasthedeformationmodelmethod,multianglemethod,3Dmodelmethod,imagecaremethod.Amongthem,3Dfacerecognitionandattention,the3Dfacereconstruction,headtracking,threefacerecognition,facialexpressionanalysisandsynthesisof4levels.Atpresent,facethreefacerecognitionalgorithmproblemisimagedataaredifficulttoobtain,theproblemistoolarge,themassstoragedatamodelingtime.

(3)recognitionofhandshape

AmericaaviationbrigadeBureauofairpilotsatthestartoftheaircraft,precisioninstrumenttomeasurethehandshapedpocketbypalmfeature(fingerlength,widthandthicknessofthepalm)recognitionisthepilotintheoperation,itasabiologicalfeaturerecognitiontechnologyisdeveloping,becausemustweartheinstrumentinthehandsoflargesizeonlyuse,America,participatingenterprisesless,thepriceishigher,alltheseproblemsneedtobefurtherstudied.

(4)thevoicerecognitiontechnology

Speakerrecognitionisthedifferencebetweenpersonalvoicetoautomaticallydeterminewhetherthepersonis.Eachsoundisinfluencedbytheirphysical,dialect,environment.Theadvantageofvoiceprintrecognitionwithoutpriorregistration,withsmallpsychologicalrecognition,andthedeviceissimple,generalcomputercandealwithweakvoice;foreasycollection,canbeusedforpubliccommunicationlinemonitoringbythestatesecuritydepartment'sattention.Theshortageisthechangeoftoneorambientnoiseischangingthesoundmay,rejectionrate,errorrateishigh.handwritingrecognitiontechnology

Handwritingrecognitionisoneofthepersonalidentificationtechnology.Handwritingitselfonlystaticinformation,tobethesameaswhenitisnecessarytoconsiderthestaticinformation,alsowanttoconsidertheorderofstrokes,penpressuredynamicinformation.Peopleinwritingmaynotbeexactlythesamebehavior,itisinfluencedbyphysiological,psychologicalandotherfactors,therearecorrespondingpoints,therearealsodifferences.Therefore,samplesandmaterialscannotbe100%identical,thereisalsothepossibilitytoidentify.Handwritingrecognitioncomparedwithothermethods,theusers'psychologicalresistanceofsmall,highsuccessfulrate,lowprice;combiningwithotherhandwritingrecognitionwiththeexistingfinancialsystemandtosomeextentalsotheattention.Buttherecognitionaccuracyisaffectedbyhandwritinginfluence,itisverydifficulttoautomaticallyidentifyessentialdifferencesandnonessentialdifferences.2.2IrisrecognitiontechnologybasedonthebriefintroductionBiometricidentificationinevitablerejectionanderroridentificationproblem.Therefore,inordertoimprovethematchingaccuracy,toprovidesupplementaryschemeonmanyoccasions,inordertopreventthisfromhappening,butmanyprofessionalbelievesthatthisissueisnotimportant,comparedwiththetraditionalmethods,biologicalfeaturerecognitiontechnologyismoresafeandreliable.

Somebiologicalfeaturerecognitiontechnologygenerallyneedtobettersignalacquisitiondeviceandthecomputingplatform,althoughsomeyearstheirpriceshavedeclinedsignificantly,buttheyarestillmoreexpensivethantraditionalmeans,ofcourse,suchexpensivealsonoreturn,itbringsmoresecurity.

Sofar,thereisnotasinglebiometrictechnologycanmeettherequirementsofbethepinkofperfection.Accordingtothecomparison,basedonbiometricswefoundthat,regardlessoftheaccuracy,orfromtheacquisitionandantifakeandpermanent,irisrecognitionandsoinownhigheradvantageinseveraltheidentification,irisrecognitionhasbecome,wasstudiedinmostcountriesandscientificresearchpersonnelproblems,alongwiththethedevelopmentofComputerScienceandtechnology,irisrecognitiontechnologyhasrisentoahigherlevel.

Basedonthefeatureofirisrecognitionandotherimagebasedrecognition,therearefourmaincomponents:andrecognitionofirisimageacquisition,imagepreprocessing,irisfeatureextraction,matching.(1)theacquisit