Patent ID: 6546122
Filing Date: 2003-04-08
Classification: G06K

Abstract:
A method for combining two templates, comprising:providing a first template having a first minutia set and a second template having a second minutia set; comparing said first template with said second template to obtain a matching minutia set; calculating registration parameters from said matching minutia set; translating all minutiae in said first minutia set using said registration parameters so that said first minutia set and said second minutia set are on the same coordinates; combining said first minutia set with said second minutia set to derive a combined minutia set; creating a first overlap region in said first minutia set, said first overlap region comprising at least matching minutiae for said first template in said matching minutia set; creating a second overlap region in said second minutia set, said second overlap region comprising at least matching minutiae for said second template in said matching minutia set, wherein creating said first overlap region and said second overlap region includes: creating a smallest possible rectangle enclosing said matching minutiae for said first template in said first minutia set; and creating a smallest possible rectangle enclosing said matching minutiae for said second template in said second minutiae set; and discarding minutiae in said first overlap region that are not part of said matching minutiae set; and discarding minutiae in said second overlap region that are not part of said matching minutiae set.