专业英语指纹识别ppt课件

1、12电信本1班王文琪、王程玉、石胜欧Fingerprint recognitionlWomen clerical employees of the Los Angeles Police Department being fingerprinted and photographed in 1928.Access Control SystemAttendance SystemComputerMobile PhoneIdentity Card Fingerprint recognition or fingerprint Fingerprint recognition or fingerprint a

2、uthentication refers to authentication refers to the automated method of verifying a match the automated method of verifying a match between two human fingerprints. Fingerprints between two human fingerprints. Fingerprints are one of many forms of biometrics used are one of many forms of biometrics

3、used to identify individuals and verify their identify.to identify individuals and verify their identify.Refinement sampling Fingerprint sensorsOpticalUltrasonicCapacitance Passive capacitance Active capacitanceThe epidermis layerThe dermis layerCharge-coupled Device(CCD)OpticalRF(Radio Frequency) s

4、ensorRF signalUltrasonicCapacitanceCapacitanceSilicon materialMjiIVMeanjiIVMARAR),(),(200N(i ,j)=otherwiseVMeanjiIVMARAR20),(0normalizedFig.1 Effect of fingerprint gamma controller normalizationThe processing of fingerprint1010)()(kiikiiriinnrprTSEqualizing:Fig.2 Effect of fingerprint gamma controller equalizingThe processing of fingerprint),(),(),(),(22jiVjiVjiVjicohcyX),(),(2),(2222vuGvuGjiVywiwiuwjwjvxx),(),(),(222222vuGvuGjiVywiwiuwjwjvxy),(),(),(222222vuGvuGjiVywiwiuwjwjvxcFig.3 Effect drawing of fingerprint divisionThe processing of fingerprintDivision: Binaryzation Filtering