Fingerprint Verification Bhushan D Patil PhD Research Scholar Department of Electrical Engineering...
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Transcript of Fingerprint Verification Bhushan D Patil PhD Research Scholar Department of Electrical Engineering...
Fingerprint VerificationFingerprint Verification
Bhushan D PatilPhD Research Scholar Department of Electrical EngineeringIndian Institute of Technology, BombayPowai, Mumbai 400076
Introduction Biometric: A human generated signal or attribute for authenticating a person’s identity Different biometric features 1.Face 2.Fingerprint 3.Iris 4.Signature 5.voice
Why Fingerprint
The advantages of using fingerprint fingerprint identification is one of the most
reliable identification technique Its validity is justified It is most commonly used biometrics technique
Basic Approaches
Minutia Based Approach
Image Based Approach
Automated Fingerprint Automated Fingerprint Identification SystemIdentification System
Fingerprint ClassificationFingerprint Classification
SignaturesSignatures
Use signatures to determine if two fingerprints are from same finger Ridge Endings Ridge Bifurcations
These are termed “minutia”
MinutiaeMinutiae
Minutiae Point Pattern Minutiae Point Pattern MatchingMatching
Desired Information Correspondences
between template and input F.P. are known
There are no deformations (translations, rotation, non-linear deformations)
Each minutia is exactly localized
Real Situation No correspondence is
known beforehand There are deformations Spurious minutiae are
present in templates and input images
Some minutiae are missed
On-Line F.P. Verification On-Line F.P. Verification SystemSystem
Minutia ExtractionMinutia Extraction
Estimation of Orientation Field
Identify fingerprint region
Ridge extraction
Cleaning ridge segments
Minutia extraction
Estimation of Orientation FieldEstimation of Orientation Field Orientation is the angle formed by the ridges with the horizontal axis Find the local orientation of the ridge in small areas of the image StepsDivide image into blocks of size WxW
Compute gradients [Gx Gy]at each pixel in blockOrientation at each block
Minutia ExtractionMinutia Extraction
Ridge Ending
Ridge Bifurcation
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1
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Minutia MatchingMinutia Matching
Point Pattern Alignment
Matching
Scoring
MATLAB Implementation
GUI demo……….