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Fragile watermarking based on encoding of the zeroes of the z-transform

Ho, ATS, Zhu, XZ, Shen, J and Marziliano, P (2008) Fragile watermarking based on encoding of the zeroes of the z-transform IEEE T INF FOREN SEC, 3 (3). 567 - 569. ISSN 1556-6013

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In this paper, a new fragile watermarking method for digital image authentication is proposed based on the zero locations of the z-transform. The z-transform domain is a new transform space for fragile watermark embedding. Our watermarking method is designed by exploiting the sensitivity of the positions of the zeroes of the z-transform around the unit circle to any change made on the host image. The watermarking system can localize the portions of a watermarked image that have been tampered with with high accuracy. In addition, the newly proposed scheme is more secure than normal least-significant bits-based fragile watermarking techniques. Experimental results as well as the theoretical analysis demonstrated the fragility and accuracy of the new method.

Item Type: Article
Uncontrolled Keywords: authentication, fragile watermarking, z-transform, IMAGE AUTHENTICATION
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research
Depositing User: Melanie Hughes
Date Deposited: 12 Aug 2010 09:35
Last Modified: 23 Sep 2013 18:36

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