Patent ID: 6480617
Filing Date: 2002-11-12
Classification: A61B,G06K,G07C

Abstract:
A method of identifying fingerprints, the method comprising the steps of:acquiring a test image comprising a number of test points each having a pixel value related to a three-dimensional structure of the fingerprints, and defining a test surface; determining significant points among said number of test points; for each of the significant points, determine respective pixel values of an array of test points surrounding the significant point, the array being a test region surrounding the significant point; and verifying local region similarities between the test regions surrounding said significant points and corresponding reference regions of a reference image comprising a number of reference points with pixel values so as to define a reference surface; wherein for each of the significant points, verifying the local region similarity comprises computing an integral norm of the test region and the corresponding reference region by performing a double summation of magnitudes of differences between the pixel values of the test points of the test region and the pixel values of the corresponding reference region.