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Advances in Multimedia
Volume 2012, Article ID 875759, 17 pages
http://dx.doi.org/10.1155/2012/875759
Research Article

Robust Signature-Based Copyright Protection Scheme Using the Most Significant Gray-Scale Bits of the Image

Cooperative Research Centre for Spatial Information, Department of Infrastructure Engineering, University of Melbourne, VIC 3010, Australia

Received 15 November 2011; Revised 2 March 2012; Accepted 27 March 2012

Academic Editor: Xian-Sheng Hua

Copyright © 2012 Mohammad Awrangjeb. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The most significant bit- (MSB-) plane of an image is least likely to change by the most signal processing operations. This paper presents a novel multibit logo-based signature, using the most significant gray-scale bits, which is then used to develop an extremely simple but robust copyright protection scheme, where images along with their signatures are sent to a trusted third party when a dispute arises. Different ways of processing the MSB-plane before calculating the robust signature have been developed. This paper then presents an innovative classifier-based technique to test the robustness and uniqueness of any signature-based scheme. A new MSB-based attack, which would defeat our scheme most, has also been proposed. Experimental results have clearly demonstrated the superiority of the proposed scheme showing the high robustness of different MSB-based signatures over the existing signature-based schemes.