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Proceedings Paper

Characterization of geometric distortions attacks in robust watermarking
Author(s): Xavier Desurmont; Jean-Francois Delaigle; Benoit Macq
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Paper Abstract

Robust image watermarking algorithms have been proposed as methods for discouraging illicit copying and distribution of copyright material. Having robustness to pixels modifications in mind, many watermarking designers use techniques coming from the communications domain such as spread spectrum to embed hidden information, be it in the spatial or in the transform domain. There exist numerous attacks dedicated to make watermarking algorithms inefficient that degrade images by geometric distortions. One solution to counter them is to add synchronization information. In this paper we present an analysis of this type of distortions and we propose a metric to estimate the distortion undergone by an image. This metric is content independent, invariant to global translation, rotation and scaling, which can be considered as non-meaningful transformations. To demonstrate the relevance of this metric, we compare some of its results with the subjective degradation of the image produced by the Stirmark software.

Paper Details

Date Published: 22 June 2004
PDF: 9 pages
Proc. SPIE 5306, Security, Steganography, and Watermarking of Multimedia Contents VI, (22 June 2004); doi: 10.1117/12.523635
Show Author Affiliations
Xavier Desurmont, Multitel A.S.B.L. (Belgium)
Jean-Francois Delaigle, Multitel A.S.B.L. (Belgium)
Benoit Macq, Univ. catholique de Louvain (Belgium)


Published in SPIE Proceedings Vol. 5306:
Security, Steganography, and Watermarking of Multimedia Contents VI
Edward J. Delp; Ping W. Wong, Editor(s)

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