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Adrian G. Bors, Ioannis Pitas. Embedding Parametric Digital Signatures in Images, EUSIPCO-96, September. Vol. III 1996. [.Z]   ABSTRACT: A new approach to digital image signatures (water­ marks) is proposed in this study. An image signature algorithm consists of two stages : signature casting and signature detection. In the first stage, small changes are embedded in the image which afterwards are identified in the second stage. After chosing certain pixel blocks from the image, a constraint is embedded among their Discrete Cosine Transform (DCT) coefficients. Two dif­ ferent embedding rules are proposed. The first one em­ ploys a linear type constraint among the selected DCT coefficients and the second assigns circular detection re­ gions, similar to the vector quantization techniques. The resistance of the digital signature to JPEG compression and to filtering are analyzed. | Neil's Homepage | Steganography | JJTC Main Page | Send comments to nfj(at)jjtc(dot)com. Copyright, ©1995-2008, Neil F. Johnson. All Rights Reserved. Steganography and Digital Watermarking Cryptography and Encryption The Codebreakers Research in Cryptography Related Topics and Issues Documents, News and Publications Security Newsgroups Security Tools and Archives Organizations in Security and Privacy Other Security Links -------------------------------------------- Main Security Page Neil's Home Page JJTC Home Page Center for Secure Information Systems Site Map -------------------------------------------- Cryptanalysis Cryptography and Encryption Documents, News and Publications Government Agencies Interest and User Groups Journals Network Security Newsletters Organizations in Security and Privacy Related Security Topics and Issues Research in Cryptography Security Page Security Applications Security Newsgroups Security Software Security Tools and Archives Special Events and Announcements Steganography and Digital Watermarking Steganography Documents Usenet Security Newsgroups Vendors Other Security Links