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Proceedings Paper

DWT-based technique for spatio-frequency masking of digital signatures
Author(s): Mauro Barni; Franco Bartolini; Vito Cappellini; Alessandro Lippi; Alessandro Piva
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Paper Abstract

The growth of the Internet and the diffusion of multimedia applications requires the development of techniques for embedding identification codes into images, in such a way that it can be granted their authenticity and/or protected the copyright. In this paper a novel system for image watermarking, which exploits the similarity exhibited by the Digital Wavelet Transform with respect to the models of the Human Visual System, for robustly hiding watermarks is presented. In particular, a model for estimating the sensitivity of the eye to noise, previously proposed for compression applications, is used to adapt the watermark strength to the local content of the image. Experimental results are shown supporting the validity of the approach.

Paper Details

Date Published: 9 April 1999
PDF: 9 pages
Proc. SPIE 3657, Security and Watermarking of Multimedia Contents, (9 April 1999); doi: 10.1117/12.344689
Show Author Affiliations
Mauro Barni, Univ. degli Studi di Siena (Italy)
Franco Bartolini, Univ. degli Studi di Firenze (Italy)
Vito Cappellini, Univ. degli Studi di Firenze (Italy)
Alessandro Lippi, Univ. degli Studi di Firenze (Italy)
Alessandro Piva, Univ. degli Studi di Firenze (Italy)


Published in SPIE Proceedings Vol. 3657:
Security and Watermarking of Multimedia Contents
Ping Wah Wong; Edward J. Delp, Editor(s)

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