5 August 2015 Writing trace identification using ultraviolet Fourier-transform imaging spectroscopy technique
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Conventional identification methods of writing traces commonly utilize imaging or spectroscopic techniques which work in visible to near infrared range or short-wave infrared range. Yet they cannot be applied in identifying the erased writing traces. In this study, we perform a research in identification of erased writing traces applying an ultraviolet Fouriertransform imaging spectrometer. Experiments of classifying the reflected ultraviolet spectra of erasable pens are made. The resulting hyperspectral images demonstrate that the erased writing traces on printing paper can be clearly identified by this ultraviolet imaging spectrometer.
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Hang Lyu, Hang Lyu, Ningfang Liao, Ningfang Liao, Wenmin Wu, Wenmin Wu, Yasheng Li, Yasheng Li, Bin Cao, Bin Cao, } "Writing trace identification using ultraviolet Fourier-transform imaging spectroscopy technique", Proc. SPIE 9618, 2015 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 961804 (5 August 2015); doi: 10.1117/12.2193286; https://doi.org/10.1117/12.2193286

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