Title :
Algorithm for enhancing fingerprint images
Author :
Sherlock, B.G. ; Monro, D.M. ; Millard, K.
Author_Institution :
Saint Louis Univ., Cahotia, IL, USA
Abstract :
An original algorithm is presented for the high-quality enhancement of fingerprint images. Fingerprints are directionally smoothed using a position-dependent Fourier domain filter whose orientation is everywhere matched to the local ridge orientation. Thresholding then yields the enhanced image. Use of the proposed enhancement method within a working AFIS significantly improves speed and accuracy.
Keywords :
computerised picture processing; filtering and prediction theory; AFIS; automated fingerprint identification system; directional smoothing; fingerprint image enhancement algorithm; local ridge orientation; position-dependent Fourier domain filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921093