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Multiple Watermark for Authentication and Tamper Detection using Mixed scales DWT

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Author(s): M.El Hajji | H. Ouaha | K. Afdel | H. Douzi

Journal: International Journal of Computer Applications
ISSN 0975-8887

Volume: 28;
Issue: 6;
Start page: 34;
Date: 2011;
Original page

Keywords: Watermarking | Authentication | Content-Based | Wavelet

ABSTRACT
Authentication of multimedia contents is introduced as a tool to improve the security against unauthorized manipulation and misappropriation. The risks increased when dealing with an open environment like the Internet. This paper proposes a multiple watermarking techniques using dominant blocks of wavelet coefficients in mixed scales and moment invariant methods as a complementary safety measure. The logic of use the blocks dominants map is that local features such as contours or edges are unique to each image. In addition, these dominants blocks have proven to be useful in detecting possible alteration in the temperate region of the imagebased data.

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Tangokurs Rapperswil-Jona

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