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Proceedings Paper

Application of a Fourier-transform infrared imaging system to deciphering obliterated writings for forensic purposes
Author(s): Shigeru Sugawara
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Paper Abstract

A new method of deciphering obliterated writing is proposed in this paper. Inks with a peak at 1620 cm-1 were used for writing characters on paper, and information protection stamps were then used to obliterate them. Conventional detection methods consisting of visible and near-infrared spectroscopic photography and fluorescent photography of wavelength between 0.4–1.0 μm were compared with a novel method using infrared spectroscopic imaging with a 16-element mercury cadmium telluride array detector. The samples of obliterated writing could not be detected by the conventional methods, but could by the new method. Therefore, this new method is very useful for deciphering obliterated writing.

Paper Details

Date Published: 29 May 2014
PDF: 7 pages
Proc. SPIE 9073, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XV, 90730D (29 May 2014); doi: 10.1117/12.2049894
Show Author Affiliations
Shigeru Sugawara, National Research Institute of Police Science (Japan)

Published in SPIE Proceedings Vol. 9073:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XV
Augustus Way Fountain III, Editor(s)

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