Digital watermarking technique for holography interference patterns in a transform domain |
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Authors: | Hyun-Jun Choi Young-Ho Seo Ji-Sang Yoo Dong-Wook Kim |
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Institution: | aKwangwoon University, 447-1, Welgye-1dong, Nowon-Gu, Seoul 139-701, Republic of Korea;bHansung University, Samsung-Dong 3ga, Sungbuk-Gu, Seoul 136-792, Republic of Korea |
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Abstract: | A digital holography interference pattern generated by a computer calculation (computer generated hologram, CGH) is one of the most expensive contents and its usage is being expanded. Thus, it is highly necessary to protect the ownership of a digital hologram. This paper introduces a watermarking scheme, a method to protect the ownership of digital holograms using the DCT domain data as the ones to be watermarked. This scheme shows very high imperceptibility and strong robustness against the anticipated attacks. We expect that the conclusions of this paper will be a very useful basis for further work in the area of electronic watermarking schemes for the digital holograms. |
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Keywords: | Optical image processing Computer-generated hologram Digital watermarking DCT |
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