05-Biometrics-Lecture5-Part2-2008-10-20

05-Biometrics-Lecture5-Part2-2008-10-20 - Master SC...

Info iconThis preview shows pages 1–17. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Biometrics http://scgwww.epfl.ch/courses Master SC – Information and Communication Security 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)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Fingerprint Recognition Generalities Applications Fingerprints and their images History of fingerprints Fingerprint sensing Fingerprint features Fingerprint matching Fingerprint enhancement Performance evaluation Synthetic fingerprint generation
Background image of page 2
3 Fingerprint Sensing Sweep systems Touch systems
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Fingerprint Sensing Optical scanner CMOS scanner
Background image of page 4
5 Fingerprint Sensing Internal reflection optical sensor Sheet prism optical sensor Sensor based on optical fibers Electro-optical fingerprint sensor
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 Fingerprint Sensing Capacitive (CMOS ) sensing Other solid-state sensors: -Thermal -Electric-field -Piezoelectric Ultrasound sensor
Background image of page 6
7 On-line fingerprint scanners – single finger
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8 On-line fingerprint scanners – multi finger
Background image of page 8
9 TBS – The Surround Imager (touchless)
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
10 TBS – The Surround Imager (touchless) 3D Imaging (correct) 2D imaging (wrong)
Background image of page 10
11 Fingerprint Recognition Generalities Applications Fingerprints and their images History of fingerprints Fingerprint sensing Fingerprint features Fingerprint matching Fingerprint enhancement Performance evaluation Synthetic fingerprint generation
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
12 Terminology
Background image of page 12
13 Level 1 features – singularities (core points) Left loop Right loop Whorl Arch Tented arch core delta
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
14 Coarse representation – Level 1 features Level 1 refers to the overall pattern formed by the flow of papillary ridges on the papillary surface.
Background image of page 14
15 Singular point detection Fingerprint image gradient maps G x 50 100 150 200 250 300 50 100 150 200 250 300 350 400 G y 50 100 150 200 250 300 50 100 150 200 250 300 350 400 Average square gradient maps G' x 50 100 150 200 250 50 100 150 200 250 300 350 G' y 50 100 150 200 250 50 100 150 200 250 300 350 Average Square Gradient method : gradient vector lengths are squared and their angles doubled
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
a.) 50 100 150 50 100 150 200 b.) 50 100 150 50 100 150 200 c.) 50 100 150 50 100 150 200 d.) 50 100 150 50 100 150 200 Example of singular point detection in a low quality fingerprint: a) vertical sign map, b) horizontal sign map, c) finding intersection points of the quadrant change boundaries, d) singular point detection. K. Kryszczuk, A. Drygajlo, "Singular point
Background image of page 16
Image of page 17
This is the end of the preview. Sign up to access the rest of the document.

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- Toronto.

Page1 / 57

05-Biometrics-Lecture5-Part2-2008-10-20 - Master SC...

This preview shows document pages 1 - 17. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online