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4 October 2020 Hyperspectral VIS/SWIR wide-field imaging for ink analysis
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Abstract
Hyperspectral imaging can reveal the slightest difference in the spectral response of seemingly identical inks. We have studied the reflectivity of the fundamental colors used in inkjet printers, and found distinctive spectral features depending on the supplier of the ink. We analysed discontinued bank notes, and identified discrepancies in the SWIR response of allegedly genuine notes of different ages. This may either reveal information on the history of the note as a legal tender, or reveal the fake nature of a note sold as genuine. These observations may be useful in the identification of high-fidelity counterfeit documents, or bank notes.
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© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vincent Cardin, Laura-Isabelle Dion-Bertrand, Frédérick Poirier, Stéphane Marcet, and Jacob Yvon-Leroux "Hyperspectral VIS/SWIR wide-field imaging for ink analysis", Proc. SPIE 11576, Hyperspectral Imaging and Applications, 1157609 (4 October 2020); https://doi.org/10.1117/12.2583450
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