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Digital Watermarking using Of-axis Hologram  

김규태 (마크애니 부설연구소)
김종원 (상명대학교 소프트웨어학)
김수길 (호서대학교 전기정보통신공학)
최종욱 (마크애니 부설연구소)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.41, no.3, 2004 , pp. 183-194 More about this Journal
Abstract
We propose a now watermarking scheme that can be used to embed multiple bits and also resilient to geometrical transforms such as scaling, rotation, and cropping, based on off - axis holographic watermark that allows multiple watermark recovery without original content(cover image). The holographic watermark is that Fourier transformed digital hologram is embedded into cover image in the spatial domain. The proposed method has not only increased robustness with a stronger embedding but also imprescriptibility of the watermark in the evaluation process. To compare with the convention기 scheme, the spread spectrum, we embedded and recovered maximum 1,024 bits that consist of binary number over PSNR(peak signal-to-noise ratio) 39dB. And also, we computed robustness with BER(bit error rate) corresponding the above attack
Keywords
digital Watermarking; digital Hologram; Holographic Watermark; Geometrical Attack;
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