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Proceedings Paper

Visibility enhancement and validation of segmented latent fingerprints in crime scene forensics
Author(s): Andrey Makrushin; Tobias Kiertscher; Mario Hildebrandt; Jana Dittmann; Claus Vielhauer
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Paper Abstract

Forensic investigators are permanently looking for novel technologies for fast and effective recovering of latent fingerprints at a crime scene. Traditionally, this work is done manually and therefore considered very time consuming. Highly skilled experts apply chemical reagents to improve visibility of traces and use digital cameras or adhesive tape to lift prints. Through an automation of the surface examination, larger areas can be investigated faster. This work amplifies the experimental study on capabilities of a chromatic white-light sensor (CWL) regarding the contact-less lifting of latent fingerprints from differently challenging substrates. The crucial advantage of a CWL sensor compared to taking digital photographs is the simultaneous acquisition of luminance and topography of the surface, extending the standard twodimensional image processing to the analysis of three-dimensional data. The paper focuses on the automatic validation of localized fingerprint regions. In contrast to statistical features from luminance data, previously used for localization, we propose the streakiness of a pattern as the basic feature indicating the fingerprint presence. Regions are analyzed for streakiness using both luminance and topography data. As a result, the human experts significantly save time by dealing with a limited number of approved fingerprints. The experiments show that the validation performance in terms of equal error rate does not exceed 6% even on very challenging substrates regarding high-quality fingerprints.

Paper Details

Date Published: 22 March 2013
PDF: 12 pages
Proc. SPIE 8665, Media Watermarking, Security, and Forensics 2013, 866508 (22 March 2013); doi: 10.1117/12.2003661
Show Author Affiliations
Andrey Makrushin, Otto-von-Guericke-Univ. Magdeburg (Germany)
Fachhochschule Brandenburg (Germany)
Tobias Kiertscher, Fachhochschule Brandenburg (Germany)
Mario Hildebrandt, Otto-von-Guericke-Univ. Magdeburg (Germany)
Jana Dittmann, Otto-von-Guericke-Univ. Magdeburg (Germany)
Claus Vielhauer, Otto-von-Guericke-Univ. Magdeburg (Germany)
Fachhochschule Brandenburg (Germany)

Published in SPIE Proceedings Vol. 8665:
Media Watermarking, Security, and Forensics 2013
Adnan M. Alattar; Nasir D. Memon; Chad D. Heitzenrater, Editor(s)

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