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INTRODUCTION

Research hotspots in biometrics

Verifying match between two finger prints

Optical technology- Most widely used

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BIOMETRICSDefinition

Basic steps involved

Parameters required-Universality

Uniqueness

Permanence

Acceptability

Performance

Collectability

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FINGERPRINT RECOGNITION SYSTEM

Presence of ridges and valleys

Ridges- unique to each individual

Fingerprint- unique even in case of identical twins

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COMPARISON BETWEEN BIOMETRIC TECHNIQUES

5Fig 1: Comparison [1]

OPTICAL SENSORS

Heart of an optical sensor- CCD camera

Array of light sensitive diodes- Photosites

CCD camera takes image of your finger

Direct Imaging

Three dimensional imaging6

CONVENTIONAL METHODS

FTIR method

In-finger light dispersion method

Optical fiber sensor method

Electro optical sensor method7

FTIR METHOD

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Fig 2: FTIR method [2]

IN-FINGER LIGHT DISPERSION METHOD

9Fig 3: In finger light dispersion method [3]

OPTICAL FIBER SENSOR METHOD

10Fig 4: Optical Fiber Sensor Method [6]

ELECTRO OPTICAL SENSOR METHOD

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Fig 5: Electro Optical Sensor Method [6]

OPTICAL TRANSMITTANCE METHOD

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Fig 5: Optical transmittance method [3]

IMAGES OF A WET FINGER FORMED BY CONVENTIONAL METHODS

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Fig 6: Images output by conventional sensor [3]

IMAGES OF A WET FINGER FORMED BY OPTICAL TRANSMITTANCE METHOD

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Fig 7: Image output by optical transmittance [3]

SPOOFING

Fingerprint- Unique

Stealing and duplicating fingerprint-Spoofing

How to prevent spoofing?

Analysis of Optical properties of skin

Skin response to scattering and absorption at various wavelengths

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ANTI SPOOFING TECHNIQUES

Camera solution

Laser solution

Causation of optical changes

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CAMERA SOLUTION

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Fig 8: Camera solution [4]

LASER SOLUTION

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Fig 9: Laser Solution [4]

CAUSATION OF OPTICAL CHANGES

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Fig 10: Causation of optical changes [5]

COMPARISON-OPTICAL AND

CAPACITIVE SENSORS

Sensor surface

Overall durability

Imaging area, resolution, size

Cost effectiveness 20

APPLICATION OF BIOMETRIC OPTICAL SENSORS

Security for computers and networks

Banking and finance industry

Smart cards and e-passports

Military identification

Electronic commerce

Employee attendance system

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ADVANTAGES OF OPTICAL SENSORS

Compact and light weight in design

Accurate

Identification process is easy

Low cost

No high level changes in environment

Durable

Maintenance free22

CONCLUSION

More secure

Optical sensing- more reliable

Spoofing can even be prevented

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REFERENCES [1] D. Maltoni, D. Maio, A. K. Jain, and S. Prabhakar, Handbook Of

Fingerprint Recognition, 2nd Edition, Springer, 2009. [2] Biometric recognition: Sensor Characteristics and image quality

IEEE Instrumentation and Measurement Magazine June 2011 [3] Fingerprint Authentication Using Optical Characteristics in a

Finger

SICE-ICASE International Joint Conference [4] Liveness Detection for Biometric Systems based on papillary

lines

International Journal of Security and Its Applications, Volume 2 [5] New Experiments with Optical Liveness Testing Methods

Journal of Information Hiding and Multimedia Signal Processing, Oct 2010

[6] Marie Sandstraom, Liveness Detection in Fingerprint Recognition Systems

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THANK YOU

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