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Proceedings Paper

Robustness and security assessment of image watermarking techniques by a stochastic approach
Author(s): V. Conotter; G. Boato; C. Fontanari; F. G. B. De Natale
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Paper Abstract

In this paper we propose to evaluate both robustness and security of digital image watermarking techniques by considering the perceptual quality of un-marked images in terms of Weightened PSNR. The proposed tool is based on genetic algorithms and is suitable for researchers to evaluate robustness performances of developed watermarking methods. Given a combination of selected attacks, the proposed framework looks for a fine parameterization of them ensuring a perceptual quality of the un-marked image lower than a given threshold. Correspondingly, a novel metric for robustness assessment is introduced. On the other hand, this tool results to be useful also in those scenarios where an attacker tries to remove the watermark to overcome copyright issues. Security assessment is provided by a stochastic search of the minimum degradation that needs to be introduced in order to obtain an un-marked version of the image as close as possible to the given one. Experimental results show the effectiveness of the proposed approach.

Paper Details

Date Published: 10 February 2009
PDF: 10 pages
Proc. SPIE 7245, Image Processing: Algorithms and Systems VII, 72450Z (10 February 2009); doi: 10.1117/12.807357
Show Author Affiliations
V. Conotter, Univ. of Trento (Italy)
G. Boato, Univ. of Trento (Italy)
C. Fontanari, Univ. of Trento (Italy)
F. G. B. De Natale, Univ. of Trento (Italy)

Published in SPIE Proceedings Vol. 7245:
Image Processing: Algorithms and Systems VII
Nasser M. Nasrabadi; Jaakko T. Astola; Karen O. Egiazarian; Syed A. Rizvi, Editor(s)

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