Title: Container Weld Identification using Portable Laser Scanners
Citation: JOURNAL OF ELECTRONIC IMAGING vol. 24 no. 2 p. 023005
Publisher: IS&T & SPIE
Publication Year: 2015
JRC N°: JRC78422
ISSN: 1017-9909
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC78422
DOI: 10.1117/1.JEI.24.2.023005
Type: Articles in periodicals and books
Abstract: Abstract. Identification and integrity verification of sealed containers for security applications can be obtained by employing noninvasive portable optical systems. We present a portable laser range imaging system capable of identifying welds, a byproduct of a container’s physical sealing, with micrometer accuracy. It is based on the assumption that each weld has a unique three-dimensional (3-D) structure which cannot be copied or forged. We process the 3-D surface to generate a normalized depth map which is invariant to mechanical alignment errors and that is used to build compact signatures representing the weld. A weld is identified by performing cross correlations of its signature against a set of known signatures. The system has been tested on realistic datasets, containing hundreds of welds, yielding no false positives or false negatives and thus showing the robustness of the system and the validity of the chosen signature.
JRC Directorate:Nuclear Safety and Security

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