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HoloMarking: Digital Watermarking Method using Fresnel Hologram  

Choi, Hyun-Jun (광운대학교 융합미디어 연구소)
Seo, Young-Ho (광운대학교 융합미디어 연구소)
Yoo, Ji-Sang (광운대학교 융합미디어 연구소)
Kim, Dong-Wook (광운대학교 융합미디어 연구소)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.6C, 2009 , pp. 604-610 More about this Journal
Abstract
This paper propose a digital watermarking method for digital contents which satisfies both the invisibility and the robustness to attacks to prohibit counterfeiting, modification, illegal usage and illegal re-production of video contents. This watermarking algorithm insert a watermark(digital hologram) by generated using Fresnel transform which improve the robustness. The inserting positions of the watermark choose by considering the frequency property of an image and a watermark. Also the amount of watermarking for watermark bit decide by considering the level of 2DDWT. This algorithm was implemented by C++ and experimented for invisibility and robustness with optical system. The experiment results showed that the method satisfied enough the invisibility of the inserted watermark and robustness against attacks. For the general attacks, the error rate of the extracted watermark was less than 15%, which is enough in robustness against the attacks.
Keywords
Digital Watermarking; Digital Hologram; Content Security; Fresnel Transform; DWT;
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