9 April 1999 DWT-based technique for spatio-frequency masking of digital signatures
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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.
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Mauro Barni, Mauro Barni, Franco Bartolini, Franco Bartolini, Vito Cappellini, Vito Cappellini, Alessandro Lippi, Alessandro Lippi, Alessandro Piva, Alessandro Piva, } "DWT-based technique for spatio-frequency masking of digital signatures", Proc. SPIE 3657, Security and Watermarking of Multimedia Contents, (9 April 1999); doi: 10.1117/12.344689; https://doi.org/10.1117/12.344689
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