A POSTPROCESSING METHOD FOR THE DIRECTIONAL FIELD OF FINGERPRINT
This work is supported by National Natural Science Foundation of China, under Grant Number 60175008, Foundation for University Key Teacher by the Ministry of Education and Natural Science Foundation of Fujian Province under Grant Number A0110004.
An efficient method for postprocessing of the directional field is presented. Utilizing the coherence of the squared gradients, our algorithm firstly clears off the background/noise block in the directional field and then smoothes the directional field. Through this method, we can get accurate directional field. The efficiency of this method is illustrated by experiment.