基于细节点的指纹识别算法分析与实现

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1、北京T．qk人学T学硕。}：学位论文-l^s，!／^●AbstractWiththedevelopmentofelectroniccomputerandinformationtechnology,theidentificationtechnologyusingbiometrichavedrawnmoreattention．Duetotheuniquenessandinvariability,fingerprintsidentificationisbecomingoneofthesaftest，mostconvenie

2、ntandmostreliabletechnologyofidentificationreplacingthetraditionalmeansofidentification．Bntbecauseofthenonlinearfactorssuchasnoiseandelasticityaboutfingerprintimageandother,aswellastheconfidentialityofmanydocumentsduetocommercialinterests，anidealmethodoffingerp

3、rintidentificationisstillaveryimportantSubjectathome．Thepapergivesadetailedstudyonpartofthealgorithmoffingerprintimagepre—processing，featureextractionandfingerprintimagematching．Intheprocessofthepre—processingoffingerprintimages，thepaperusesformulatoevaluatethe

4、directionmarketofafingerprintimage，andusesthefilterswiththeinformationofdirectionstoprocessfiltering，thenUSeSlocalthresholdmethodasbinarizationalgorithmprocessingfingerprintimage．Thepaperuseaparallelprocessingalgorithmbasedonindextabletothinningprocessing，which

5、Cangethi曲-qualityfingerprintskeleton．Inthinningprocessing，joinrelatedoperationstoremoveburrandshort—term，whichcanraisedeffectivelytheimagequality．Inthestageoffingerprintfeatureextraction，featureextractionisundergonewiththemethodofaneighborhoodcodeRidgetrackinga

6、lgorithm．Foralargenumberofcounterfeitfeaturesafterfingerprintfeatureextraction，thefingerprintpseudo—filteralgorithmbasedonlocalstructureinformationisusedtofilterallkindsofpseudo··characteristi--CS，andtheexperimentalresultsshowthatgoodresultshavebeenachieved．Int

7、hestageoffingerprintimagematching，apatternmatchingalgorithmbasedonasimilartriangleisintroducedtothepattemmatchingalgorithmbasedonthepointmodel，andeffectofidentificationhasbeenachieved．Thispaperrealizestheentirefingerprintidentificationsystemalgorithmusingprogra

8、mlanguageoncomputer．Theexperimentalresultsshowthatthefingerprintrecognitionprocessingalgorithmsimprovedbythispaperfulfilltheirrespectivefimctionsverywellandhaveachivedthedes