Owner INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventors BALMELLI, Laurent; BERNARDINI, Fausto; TAUBIN, Gabriel

Pub. Number AU-A-2003209106

PCT Number PCT/US03/04003

PCT Pub. Number WO2003/069543

Priority 60/356,441 12.02.02 US; 10/310,428 05.12.02 US

Filing date 10 February 2003

Wipo publication date 4 September 2003

G06K 009/36 Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints - Image preprocessing, i.e. processing the image information without deciding about the identity of the image

G06K 009/64 Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints - using simultaneous comparisons or correlations of the image signals with a plurality of references, e.g. resistor matrix

G06K 009/40 Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints - Noise filtering

G06K 009/42 Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints - Normalisation of the pattern dimensions

G06K 009/44 Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints - Smoothing or thinning of the pattern

G06K 009/46 Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints - Extraction of features or characteristics of the image

G06K 009/56 Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints

G06K 009/60 Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints - Combination of image acquisition and preprocessing functions