Direction field of fingerprint image and its optimization with the help of relaxation procedures

Abstract

Direction field building has an exclusive importance for common process of the classification analysis in up-to- date automatic fingerprint identification systems. All characteristics of this analysis strongly depend on direction field reliability. That’s why effective technologies development for the optimization of direct field is the actual problem. In this work we pay attention to the smoothing procedures of relaxation type, which use the gradient disbalance minimization principle.