Towards a "fingerprint" of paper network; separating forgeries from genuine by the properties of fibre structure
Takalo, J., Timonen, J., Sampo, J., Rantala, M., Siltanen, S., & Lassas, M. (2014). Towards a "fingerprint" of paper network; separating forgeries from genuine by the properties of fibre structure. In D. Burgess, G. Owen, H. Rana, R. Zamboni, F. Kajzar, & A. A. Szep (Eds.), Optics and Photonics for Counterterrorism, Crime Fighting, and Defence X; and Optical Materials and Biomaterials in Security and Defence Systems Technology XI (Article 92530A). SPIE - International Society for Optical Engineering. SPIE conference proceedings, 9253. https://doi.org/10.1117/12.2066809
Julkaistu sarjassa
SPIE conference proceedingsPäivämäärä
2014Tekijänoikeudet
© SPIE, The International Society for Optics and Photonics.
A novel method is introduced for distinguishing counterfeit banknotes from genuine samples. The method is based on analyzing differences in the networks of paper fibers. The main tool is a curvelet-based algorithm for measuring the distribution of overall fiber orientation and quantifying its anisotropy. The use of a couple or more appropriate parameters makes it possible to distinguish forgeries from genuine samples as concentrated point clouds in a two- or three-dimensional parameter space. Furthermore, the techniques of making watermarks is investigated by comparing genuine and counterfeit e50 banknotes. In addition, the so-called wire markings are shown to differ significantly from each other in all of investigated banknotes.
Julkaisija
SPIE - International Society for Optical EngineeringEmojulkaisun ISBN
978-1-62841-316-8Konferenssi
Optics and Photonics for Counterterrorism, Crime Fighting, and Defence; Optical Materials and Biomaterials in Security and Defence Systems TechnologyKuuluu julkaisuun
Optics and Photonics for Counterterrorism, Crime Fighting, and Defence X; and Optical Materials and Biomaterials in Security and Defence Systems Technology XIISSN Hae Julkaisufoorumista
0277-786XJulkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/24034569