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Proceedings Paper

Non-destructively reading out information embedded inside real objects by using far-infrared light
Author(s): Ayumi Okada; Piyarat Silapasuphakornwong; Masahiro Suzuki; Hideyuki Torii; Youichi Takashima; Kazutake Uehira
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Paper Abstract

This paper presents a technique that can non-destructively read out information embedded inside real objects by using far-infrared-light. We propose a technique that can protect the copyrights of digital content for homemade products using digital fabrication technologies such as those used in 3D printers. It embeds information on copyrights inside real objects produced by 3D printers by forming fine structures inside the objects as a watermark that cannot be observed from the outside. Fine structures are formed near the surface inside real objects when they are being fabricated. Information embedded inside real objects needs to be read out non-destructively. We used a technique that could non-destructively read out information from inside real objects by using far-infrared light. We conducted experiments where we structured fine cavities inside objects. The disposition of the fine domain contained valuable information. We used the flat and curved surfaces of the objects to identify them. The results obtained from the experiments demonstrated that the disposition patterns of the fine structures appeared on the surface of objects as a temperature profile when far-infrared light was irradiated on their surface. Embedded information could be read out successfully by analyzing the temperature profile images of the surface of the objects that were captured with thermography and these results demonstrated the feasibility of the technique we propose.

Paper Details

Date Published: 22 September 2015
PDF: 7 pages
Proc. SPIE 9599, Applications of Digital Image Processing XXXVIII, 95992V (22 September 2015); doi: 10.1117/12.2189486
Show Author Affiliations
Ayumi Okada, Kanagawa Institute of Technology (Japan)
Piyarat Silapasuphakornwong, Kanagawa Institute of Technology (Japan)
Masahiro Suzuki, Kanagawa Institute of Technology (Japan)
Hideyuki Torii, Kanagawa Institute of Technology (Japan)
Youichi Takashima, Nippon Telegraph and Telephone Corp. (Japan)
Kazutake Uehira, Kanagawa Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 9599:
Applications of Digital Image Processing XXXVIII
Andrew G. Tescher, Editor(s)

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