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PRL
2007
180views more  PRL 2007»
11 years 4 months ago
Symmetric hash functions for secure fingerprint biometric systems
Securing biometrics databases from being compromised is one of the most important challenges that must be overcome in order to demonstrate the viability of biometrics based authen...
Sergey Tulyakov, Faisal Farooq, Praveer Mansukhani...
JMIV
1998
130views more  JMIV 1998»
11 years 4 months ago
Topological Numbers and Singularities in Scalar Images: Scale-Space Evolution Properties
Singular points of scalar images in any dimensions are classified by a topological number. This number takes integer values and can efficiently be computed as a surface integral ...
Stiliyan Kalitzin, Bart M. ter Haar Romeny, Alfons...
COMGEO
2006
ACM
11 years 5 months ago
An exact and efficient approach for computing a cell in an arrangement of quadrics
We present an approach for the exact and efficient computation of a cell in an arrangement of quadric surfaces. All calculations are based on exact rational algebraic methods and ...
Elmar Schömer, Nicola Wolpert
CAGD
2008
99views more  CAGD 2008»
11 years 5 months ago
Topology and arrangement computation of semi-algebraic planar curves
We describe a new subdivision method to efficiently compute the topology and the arrangement of implicit planar curves. We emphasize that the output topology and arrangement are g...
Lionel Alberti, Bernard Mourrain, Julien Wintz
VIP
2001
11 years 6 months ago
Fingerprint Classification Based on Extraction and Analysis of Singularities and Pseudoridges
In this paper, we introduce a new approach to fingerprint classification based on both singularities and traced pseudoridge analysis. Since noise exists in most of the fingerprint...
Qinzhi Zhang, Kai Huang, Hong Yan
CGI
2004
IEEE
11 years 9 months ago
Computing Polygonal Surfaces from Unions of Balls
We present a new algorithm for computing a polygonal surface from a union of balls. The method computes and connects the singular points of a given union of balls in an efficient ...
Roger C. Tam, Wolfgang Heidrich
ICB
2007
Springer
134views Biometrics» more  ICB 2007»
11 years 11 months ago
Singular Points Analysis in Fingerprints Based on Topological Structure and Orientation Field
Abstract. As an important feature of fingerprints, singular points (includingcores and deltas) not only represent the local ridge pattern characteristics, but also determine the to...
Jie Zhou, Jinwei Gu, David Zhang
ICPR
2006
IEEE
12 years 6 months ago
Singular point detection in fingerprints using quadrant change information
Automatic localization of singular points in fingerprints is of critical importance in many algorithms. Existing methods of detecting singular points often require tedious ad-hoc ...
Andrzej Drygajlo, Krzysztof Kryszczuk
CVPR
2009
IEEE
13 years 11 days ago
Curvature and Singularity Driven Diffusion for Oriented Pattern Enhancement with Singular Points
Oriented patterns, e.g. fingerprints, consist of smoothly varying flow-like patterns, together with important singular points (i.e. cores and deltas) where the orientation change...
Qijun Zhao (The Hong Kong Polytechnic University),...
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