By Juergen Seitz
Electronic Watermarking for electronic Media discusses the recent features of electronic watermarking in a global context. Approached not just from the technical aspect, however the company and criminal aspects in addition, this ebook discusses electronic watermarking because it pertains to many components of electronic media. large in its procedure, electronic Watermarking for electronic Media offers a entire review no longer supplied by way of any texts. scholars in details know-how, legislation, multimedia layout, and economics will all locate precious fabric right here. yet this publication isn't really constrained to simply scholars. Artists, composers, legal professionals, and publishers will all locate price during this electronic watermarking ebook.
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Extra info for Digital Watermarking for Digital Media
Multimedia watermarking techniques. Proceedings of the IEEE, 87(7), 1079–1107. , & Girod, B. (1999, January). Spread spectrum watermarking: Malicious attacks and counterattacks. Proceedings of SPIE Electronic Imaging ’99, Security and Watermarking of Multimedia Contents, San Jose, CA. T. (1999, September). Performance measures for image watermarking schemes. Proceedings of the Fifth Baiona Workshop on Emerging Technologies in Telecommunications, Baiona, Spain. eece. ). International Intellectual Property Alliance, Country Reports.
2001), first, the 128-bit hash of all the DCT coefficients is calculated. A number of middle-frequency coefficients are then selected from each DCT block. The least significant bits of the selected coefficients are losselessly compressed when the coefficients are scanned in a secretly determined order. The lossless compression stops when enough space has been created for embedding the hash. The compressed bit stream and the hash are then concatenated and replace the LSBs of the selected coefficients.
The powerful StirMark attack has been designed by a research group at the University of Cambridge (Anderson, Petitcolas, & Kuhn, 1999). The attack simulates image distortions that commonly occur when a picture is printed, photocopied, and rescanned. The image is slightly stretched and compressed by random amounts, a small amount of noise is added (Fridrich, 1998). Comparable applications are the mosaic and histogram attacks. The mosaic attack assembles and reassembles the watermarked image. The histogram attack describes attacks on simple watermarks methods.