Computer-aided contact-less localization of latent fingerprints in low-resolution CWL scans

Authors:
Andrey Makrushin;Tobias Kiertscher;Robert Fischer;Stefan Gruhn;Claus Vielhauer;Jana Dittmann
Affiliations:
Otto-von-Guericke University of Magdeburg, Magdeburg, Germany,Brandenburg University of Applied Sciences, Brandenburg an der Havel, Germany;Brandenburg University of Applied Sciences, Brandenburg an der Havel, Germany;Brandenburg University of Applied Sciences, Brandenburg an der Havel, Germany;Brandenburg University of Applied Sciences, Brandenburg an der Havel, Germany;Brandenburg University of Applied Sciences, Brandenburg an der Havel, Germany;Otto-von-Guericke University of Magdeburg, Magdeburg, Germany
Venue:
CMS'12 Proceedings of the 13th IFIP TC 6/TC 11 international conference on Communications and Multimedia Security
Year:
2012

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Abstract

In forensic investigations, the recovering of latent fingerprints is one of the most essential issues. Driven by human experts, today this process is very time consuming. An automation of both examination of suspicious areas and acquisition of fingerprints lead on the one hand to the covering of larger surfaces and on the other hand to significant speed up of the evidence collection. This work presents an experimental study on capabilities of chromatic white-light sensor (CWL) regarding the contact-less localization of latent fingerprints on differently challenging substrates. The fully automatic CWL-based system is implemented from the acquisition through the feature extraction right up to the classification. The key objective of the work is to develop a methodological approach for the quantitative evaluation of the localization success. Based on the proposed performance measures, the optimal system parameters such as scan resolution, extracted features and classification scheme are specified dependent on the surface material. Our experiments from an actual project with the sensor industry partner show convincing localization performance on easy-to-localize and adequate performance on moderate-to-localize substrates. The hard-to-localize substrates require further improvements of the localization system.