Algorithm for enhancing fingerprint images

27 August 1992

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 28 (18) , 1720-1721
https://doi.org/10.1049/el:19921093

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

AFIS
LOCAL RIDGE ORIENTATION
AUTOMATED FINGERPRINT IDENTIFICATION SYSTEM
DIRECTIONAL SMOOTHING
POSITION-DEPENDENT FOURIER DOMAIN FILTER
FINGERPRINT IMAGE ENHANCEMENT ALGORITHM

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