Post on 25-Jul-2015
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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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
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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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
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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