ISSN: 0022-1198
CODEN: JFSCA
Page Count: 13

Operational Experience of Fingermark Enhancement by Frequency Domain Filtering
Jackson, GR
Research Scientist and Forensic Photographer, Research and Development Section, Metropolitan Police Forensic Science Laboratory,

Bramble, SK
Research Scientist and Forensic Photographer, Research and Development Section, Metropolitan Police Forensic Science Laboratory,

(Received 25 October 1993; accepted 4 January 1994)

Abstract

Fourier transformation of an image and subsequent filtering in the frequency domain has been found to be an effective way to improve images of fingermarks on interfering backgrounds. Examples are given of success in reducing periodic backgrounds that would otherwise have prevented fingermark identification. In addition, it has been found that better background suppression is obtained when high-resolution images are used.

Keywords:
forensic science, fingerprints, digital image processing, Fourier transform, charge-coupled devices

Paper ID: JFS13674J
DOI: 10.1520/JFS13674J
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