Fingerprint Matching with Self Organizing Maps 307 X Fingerprint Matching with Self Organizing Maps Anastasia N. Ouzounoglou 1 , Pantelis A. Asvestas 2 and George K. Matsopoulos 1 1 School of Electrical and Computer Engineering National Technical University of Athens Greece 2 Department of Medical Instruments Technology School of Technological Applications Technological Educational Institute of Athens Greece 1. Introduction Fingerprint, namely the reproduction of a fingertip epidermis, produced when a finger is pressed against a smooth surface, is a human characteristic that has been systematically used for identication purposes for over 100 years. Fig. 1. Typical diagram of the fingerprint enrollment and identification processes. 19