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Proceedings Paper

Perceptual hash based blind geometric synchronization of images for watermarking
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Paper Abstract

In this work, we consider the problem of blind geometric synchronization of images for watermarking. Existing solutions involve insertion of periodic templates, geometrically-invariant domains, and feature-point-based techniques. However, security leakage and poor watermark detection performance under under lossy geometric attacks are some known disadvantages of these methods. Different from above, recently a perceptual-hash-based secure and robust image synchronization scheme has been proposed. Although it has some promising results, it requires a series of heavy computations which prevents it from being employed in real time (or near real time) applications and from being extended to wider range of geometric attack models. In this paper, we focus on the computational efficiency of this scheme and introduce a novel randomized algorithm which conducts geometric synchronization much faster.

Paper Details

Date Published: 18 March 2008
PDF: 8 pages
Proc. SPIE 6819, Security, Forensics, Steganography, and Watermarking of Multimedia Contents X, 68191G (18 March 2008); doi: 10.1117/12.764994
Show Author Affiliations
Baris Coskun, Polytechnic Univ. (United States)
M. Kivanç Mihçak, Bogaziçi Univ. (Turkey)


Published in SPIE Proceedings Vol. 6819:
Security, Forensics, Steganography, and Watermarking of Multimedia Contents X
Edward J. Delp; Ping Wah Wong; Jana Dittmann; Nasir D. Memon, Editor(s)

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