6 March 2015 Container weld identification using portable laser scanners
Author Affiliations +
J. of Electronic Imaging, 24(2), 023005 (2015). doi:10.1117/1.JEI.24.2.023005
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.
© 2015 SPIE and IS&T
Pierluigi Taddei, Gunnar Boström, David Puig, Victor Kravtchenko, Vítor Sequeira, "Container weld identification using portable laser scanners," Journal of Electronic Imaging 24(2), 023005 (6 March 2015). https://doi.org/10.1117/1.JEI.24.2.023005

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