NDLI: Correlation-based asymmetric watermark detector

Content Provider	IEEE Xplore Digital Library
Author	Tae Young Kim Taejeong Kim Hyuk Choi
Copyright Year	2003
Description	Author affiliation: Sch. of Electr. Eng., Seoul Nat. Univ., South Korea (Tae Young Kim; Taejeong Kim; Hyuk Choi)
Abstract	Asymmetric watermarking is second generation watermarking scheme which uses different keys for watermark embedders and detectors for public applications. Recently, many algorithms to render asymmetry were suggested: for example, eigenvector watermark, periodic watermark, neural network system, etc. A simple algorithm was proposed by Hartung and Girod (1997). They generated a detection key by substituting noise for a portion of a given embedding key and detected the watermarks by the usual correlation test. In this paper, we generalize their idea by the concept of the angle of the two keys. We study correlation detector structure for a transform based asymmetric watermarking scheme. We propose a secure transform to render asymmetry: random directional angle rotation after linear projection. We also address the merits and the drawbacks of the proposed system.
Sponsorship	IEEE Comput. Soc. Task Force on Inf. Technol. Bus. Appl
Starting Page	564
Ending Page	568
File Size	305614
Page Count	5
File Format	PDF
ISBN	0769519164
DOI	10.1109/ITCC.2003.1197591
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-04-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Watermarking Detectors Testing Neural networks Noise generators Additive noise Data processing Distributed power generation Spread spectrum communication Performance evaluation
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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