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Thermal imaging of ear biometrics

Thermal imaging of ear biometrics. Steinar Watne. Thermal imaging of ear biometrics. Outline Introduction to biometrics Ear as biometric Research questions Experiment Pre-processing Preliminary results Conclusion. Thermal imaging of ear biometrics. Introduction to biometrics

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Thermal imaging of ear biometrics

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  1. Thermal imaging of ear biometrics Steinar Watne

  2. Thermal imaging of ear biometrics • Outline • Introduction to biometrics • Ear as biometric • Research questions • Experiment • Pre-processing • Preliminary results • Conclusion

  3. Thermal imaging of ear biometrics • Introduction to biometrics • Authentication • Airports • ATM • Buildings • Computer systems • Claiming identity and providing proof

  4. Thermal imaging of ear biometrics • Introduction to biometrics cont. (Proofs) • Something you have • Key • Token • Smart card • Something you know • Password • PIN code • Accepted or rejected

  5. Thermal imaging of ear biometrics • Introduction to biometrics cont. (Proofs) • Something you are • Behavioral • Gait • Signature • Physiological • Fingerprint • Iris • Ear • Never 100% match

  6. Thermal imaging of ear biometrics • Ear as biometric • Physiological • Feature capture • Normal images • Thermal images • Ear prints for criminal records • Seven characteristics

  7. Thermal imaging of ear biometrics • Ear as biometric cont. (Characteristics) • Universality • Permanence • Collectability • Performance • Acceptability • Circumvention • Uniqueness

  8. Thermal imaging of ear biometrics • Research questions • What techniques do already exist for ear authentication? • How good are our results using thermal images compared to results using existing methods?

  9. Thermal imaging of ear biometrics • Research questions cont. • Is it possible to determine differences in peoples ears by looking at a thermal image? • Do environmental factors, e.g. temperature, affect our results in any way?

  10. Thermal imaging of ear biometrics • Research questions cont. (Motivation) • Burge et al. propose thermal images • Difference in temperature • Easy to mask hair away

  11. Thermal imaging of ear biometrics • Experiment (Main) • 75 participants • 15 images • 3 sessions • Right ear • Temperature

  12. Thermal imaging of ear biometrics • Experiment (Main) cont. • Age • 19-65 yrs. • Gender • 11 female • Mean age: 27 yrs. • Std. dev. 9 • 64 male • Mean age: 28 yrs. • Std. dev. 9

  13. Thermal imaging of ear biometrics • Experiment (Sub) • 5 Participants • Cooled ears (10 minutes) • 2 initial images • Images taken each 15 seconds for 15 minutes (61 total) • How much time is needed before the ear is back to “normal”?

  14. Thermal imaging of ear biometrics • Pre-processing • SmartView • Palette • Scale selection • MatLab • Axis • Rotation • Cropping/resizing

  15. Thermal imaging of ear biometrics • Pre-processing cont. • SmartView • Palette • Scale selection • MatLab • Axis • Rotation • Cropping/resizing

  16. Thermal imaging of ear biometrics • Pre-processing cont. • SmartView • Palette • Scale selection • MatLab • Axis • Rotation • Cropping/resizing

  17. Thermal imaging of ear biometrics • Pre-processing cont. • SmartView • Palette • Scale selection • MatLab • Axis • Rotation • Cropping/resizing

  18. Thermal imaging of ear biometrics • Pre-processing cont. • SmartView • Palette • Scale selection • MatLab • Axis • Rotation • Cropping/resizing

  19. Thermal imaging of ear biometrics • Pre-processing cont. • SmartView • Palette • Scale selection • MatLab • Axis • Rotation • Cropping/resizing

  20. Thermal imaging of ear biometrics • Preliminary results • Commercial products • Image Comparer • ImageFinder • Weka • Algorithmic approaches • PCA • Distance metrics

  21. Thermal imaging of ear biometrics • Preliminary results • Image Comparer • Threshold at 70% • Not complete scores • What is going on behind the scenes?

  22. Thermal imaging of ear biometrics • Preliminary results • Image Comparer FAR FRR Threshold Threshold

  23. Thermal imaging of ear biometrics • Preliminary results • ImageFinder • Different filters • Difficult to tune • What is going on behind the scenes? • EER • 30% visual • 31% high contrast • 36% grayscale

  24. Thermal imaging of ear biometrics • Preliminary results • ImageFinder Visual High contrast Gray scale

  25. Thermal imaging of ear biometrics • Conclusion • Burge et al. does not seem to hold • Preliminary results

  26. Questions?

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