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Protecting Digital-Image Copyrights: A Framework
January/February 1999 (vol. 19 no. 1)
pp. 18-24
Digital watermarks have been proposed to protect legal owners from piracy--illegal copying and retransmission. However, many research problems remain open, and watermarking techniques are themselves vulnerable to piracy. This article collects fundamental watermarking concepts and offers a general watermarking framework for protecting the copyright of digital products. Registration of watermarked products is proposed for developing a trustworthy overall protection system.

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George Voyatzis, Ionnis Pitas, "Protecting Digital-Image Copyrights: A Framework," IEEE Computer Graphics and Applications, vol. 19, no. 1, pp. 18-24, Jan.-Feb. 1999, doi:10.1109/38.736465
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