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An oblivious robust digital watermark technique for still images using DCT phase modulation

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2 Author(s)
Alturki, F. ; Center for Signal & Image Process., Georgia Inst. of Technol., Atlanta, GA, USA ; Mersereau, R.

Digital watermarking is the process of secretly embedding a short sequence of information inside a digital source without changing its perceptual quality. We present a new oblivious digital watermarking method for copyright protection of still images. The technique is based on modifying the sign of a subset of low frequency DCT magnitude coefficients. The robustness to a number of standard image processing attacks is demonstrated using the criteria of the latest Stirmark test

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Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on  (Volume:6 )

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