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异质虹膜图像的鲁棒识别 Title:RobustRecognitionofHeterogeneousIrisImages Abstract: Irisrecognitiontechnologyhasgainedsignificantattentioninrecentyearsduetoitshighaccuracyanduniqueness.However,theperformanceofirisrecognitionsystemscanbelimitedwhendealingwithheterogeneousirisimages.Heterogeneousirisimagesrefertoimagescapturedunderdifferentconditionssuchaschangesinillumination,imageresolution,occlusion,andsensornoise,whichcansignificantlyaffecttherecognitionaccuracy.Inthispaper,weproposearobustrecognitionapproachforheterogeneousirisimages,aimingtoimprovetheperformanceofirisrecognitionsystemsinadverseconditions. 1.Introduction Irisrecognitionhasbeenwidelyadoptedasanefficientandsecurebiometricauthenticationmethod.Theuniquenessandstabilityofirispatternsmakethemidealforidentityverification.However,real-worldscenariosoftenposechallengestoirisrecognitionsystemsduetovariationsinimageacquisitionconditions.Thisnecessitatesthedevelopmentofrobustrecognitionmethodsforheterogeneousirisimages. 2.ChallengesinHeterogeneousIrisRecognition Heterogeneousirisimagesencompassabroadrangeofvariabilities,includingchangesinillumination,imageresolution,occlusion,andsensornoise.Thesefactorscansignificantlydegradetheperformanceofirisrecognitionalgorithmsandchallengetheirrobustness.Thissectiondiscussesthechallengesassociatedwitheachofthesevariations. 2.1IlluminationVariations Changesinilluminationcanleadtoinconsistentirisappearances,includingshadoweffects,reflections,andoverlybrightordarkimages.Traditionalirisrecognitionalgorithmsaresensitivetosuchchanges,resultingindegradedrecognitionaccuracy. 2.2ImageResolutionVariations Heterogeneousirisimagesmayhavedifferentresolutionsduetovariationsinimagingdevicesordistancetothecamera.Low-resolutionimagesoftensufferfromlossofdetail,makingextractionofuniqueirisfeatureschallenging. 2.3Occlusion Occlusions,suchaseyeglasses,contactlenses,orpartialeyelidcoverage,canhinderaccurateirisrecognition.Occlusionsintroduceadditionaltextureandshapevariations,makingitdifficulttoextractr