06-Biometrics-Lecture2-Day2-11-00-12-30

06-Biometrics-Lecture2-Day2-11-00-12-30 - Continuing...

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1 Biometric Identity Verification http://scgwww.epfl.ch/courses Continuing Education – COST 2101 Training School Dr. Andrzej Drygajlo Speech Processing and Biometrics Group Signal Processing Institute Ecole Polytechnique Fédérale de Lausanne (EPFL) Center for Interdisciplinary Studies in Information Security (ISIS)
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2 Face Speaker Recognition Dynamic Signature Fingerprints Iris Hand Others Leading Biometric Technology
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3 Popular biometric characteristics (modalities) Fingerprint Voice Signature Face Iris Hand
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4 Dynamic Signature Recognition Generalities Feature extraction Signature models and templates Signature recognition errors Signature recognition systems Advantages and disadvantages of signature as biometric
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5 Identifiable biometric characteristics Biological traces DNA (DeoxyriboNucleic Acid), blood, saliva,etc. Biological (physiological) characteristics fingerprints, eye irises and retinas, hand palms and geometry, and facial geometry Behavioral characteristics dynamic signature , gait, keystroke dynamics, lip motion Com bined voice
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6 Comparison of biometric techniques ACCURACY COST Fingerprint Vo ice / Speech Signature Fa ce Hand Iris
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7 Signature Static off-line technology – document authentication Dynamic on-line technology – signal processing and pattern recognition
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8 Signatures Off-line or « static » signatures are scanned from paper documents, where they were written in conventional way. Off-line signature analysis can be carried out with a scanned image of the signature using a standard camera or scanner. On-line or « dynamic » signatures are written with an electronically instrumented device and the dynamic information (pen tip location through time) is usually available at high resolution, even when the pen is not in contact with the paper.
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9 PDA
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10 Super PDA The Delivery Information Acquisition Device -that Brown tablet you sign when receiving a package - is one hell of a PDA. The fourth version can handle personal (Bluetooth), local (802.11b), and wide (GPRS or CDMA) area wireless networking. It also has a dialup modem, an infrared scanner, GPS capability, 128 Mbytes of RAM, and a color screen. All UPS drivers carry the device for capturing and transmitting parcel pickup and delivery data.
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11 Digitizing Tablet
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12 Pen-Tablet System (WACOM) Pen (Stylus) Tablet
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13 Pen-Tablet System – How It Works? The WACOM stylus looks and feels like a pen yet contains no batteries or magnets. Instead it takes advantage of electro-magnetic resonance technology in which radio waves are sent to the stylus and returned for position analysis. In operation , a grid of wires below the screen alternates between transmit and receive modes (about every 20 μ s): In transmit mode , the electro-magnetic signal stimulates oscillation in the coil-and capacitor resonant circuit in the pen In receive mode , the energy of the resonant circuit oscillation in the pen is detected by the antenna grid. This is then analysed to
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This note was uploaded on 06/25/2009 for the course MATH MAT 400 taught by Professor Jamespotvein during the Fall '08 term at University of Toronto.

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06-Biometrics-Lecture2-Day2-11-00-12-30 - Continuing...

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