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Proceedings Paper

Improving the robustness of nonadditive watermarks through optimum detection theory
Author(s): Alessandro Piva; Mauro Barni; Franco Bartolini; Vito Cappellini; Alessia De Rosa
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Paper Abstract

In this paper, a new watermarking system for copyright protection of digital images is presented. The method operates in the frequency domain, by embedding a pseudo-random sequence of real numbers in a selected set of DFT coefficients of the image. Moreover, the masking characteristics of the Human Visual System are exploited for watermark hiding and a synchronization pattern is introduced into the watermarked image to cope with geometrical attacks. By relying on statistical decision theory, a new decoding algorithm which is optimum for non-additive full-frame DFT watermarks is then derived. Experimental results highlight both the superiority of the novel detector scheme with respect to conventional correlation-based decoding, both the robustness of the overall system against a large set of attacks aiming at removing the watermark.

Paper Details

Date Published: 9 May 2000
PDF: 12 pages
Proc. SPIE 3971, Security and Watermarking of Multimedia Contents II, (9 May 2000); doi: 10.1117/12.384964
Show Author Affiliations
Alessandro Piva, Univ. degli Studi di Firenze (Italy)
Mauro Barni, Univ. degli Studi di Siena (Italy)
Franco Bartolini, Univ. degli Studi di Firenze (Italy)
Vito Cappellini, Univ. degli Studi di Firenze (Italy)
Alessia De Rosa, Univ. degli Studi di Firenze (Italy)

Published in SPIE Proceedings Vol. 3971:
Security and Watermarking of Multimedia Contents II
Ping Wah Wong; Edward J. Delp III, Editor(s)

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