1 / 22

Fingerprint Recognition by Matching of Gabor filter-based Patterns

Fingerprint Recognition by Matching of Gabor filter-based Patterns. Diplomarbeit Aufgabensteller: Prof. Dr. Bernd Radig Betreuer: Dipl. Inf. Matthias Wimmer. Biometrics. Idea: Authentification of human beings using physical characteristics. History of the use of fingerprints:

marianelah
Download Presentation

Fingerprint Recognition by Matching of Gabor filter-based Patterns

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fingerprint Recognition by Matching of Gabor filter-based Patterns Diplomarbeit Aufgabensteller: Prof. Dr. Bernd Radig Betreuer: Dipl. Inf. Matthias Wimmer

  2. Biometrics Idea: Authentification of human beings using physical characteristics History of the use of fingerprints: 19th century: Uniqueness of fingerprints 1998: FBI - IAFIS, Integrated Automatic Fingerprint Identification System Technische Universität München Markus Huppmann

  3. Authentification (Workflow) • Enrollment • Detection of unique attributes • Creation of the template • Matching: Comparison of the template with other templates → Matching score → Decision: Acceptance or rejection (threshold) Technische Universität München Markus Huppmann

  4. Minutiae Matching (1) Fingerprint recognition using ridge singularities: - Ridge bifurcation - Ridge ending Technische Universität München Markus Huppmann

  5. Minutiae Matching (2) Technische Universität München Markus Huppmann

  6. Minutiae Matching (3) Matching: → Matchingscore Technische Universität München Markus Huppmann

  7. Problems • Fingerprints of dry or wet fingers • Non-overlapping areas → Global approach: Pattern Matching Technische Universität München Markus Huppmann

  8. Pattern Matching Gabor filter-based Pattern Matching • Normalization • Segmentation • Reference point detection • Gabor filter • Creation of the Feature Map • Matching Technische Universität München Markus Huppmann

  9. Reference Point Detection • Reference point defined as the point, where the ridges possess the highest curvature • Orientation map Technische Universität München Markus Huppmann

  10. Gabor Filter (1) Sinusoid multiplied by a Gaussian function Technische Universität München Markus Huppmann

  11. Gabor Filter (2) Gabor filter in direction 0° Technische Universität München Markus Huppmann

  12. Gabor Filter (3) Technische Universität München Markus Huppmann

  13. Creation of the Feature Map Tessellation → Template Technische Universität München Markus Huppmann

  14. Creation of the Feature Map Technische Universität München Markus Huppmann

  15. Matching (1) Comparison of the feature maps: Similar feature maps → low distance → "good" matching score → acceptance Technische Universität München Markus Huppmann

  16. Matching (2) Technische Universität München Markus Huppmann

  17. Matching (3) Different feature maps → high distance → "bad" matching score → rejection Technische Universität München Markus Huppmann

  18. Matching (4) Technische Universität München Markus Huppmann

  19. Tests • Database of 80 fingers with 4 fingerprints per finger • 2 Tests: • Genuine test: Matching of every fingerprint of the same finger (1A:1B, 1A:1C, 1A:1D, 1B:1C, … , 1C:1D) → "good" matching scores • Imposter test: Matching of the first fingerprint of every set with the first fingerprint of the other sets (1A:2A, 1A:3A, … , 79A:80A) → "bad" matching scores Technische Universität München Markus Huppmann

  20. Biometric benchmarks • FAR: false acceptance rate • FRR: false rejection rate • EER: equal error rate optimal threshold where FAR = FRR Technische Universität München Markus Huppmann

  21. Test results equal error rate = 1.88 % Technische Universität München Markus Huppmann

  22. Questions? Technische Universität München Markus Huppmann

More Related