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Robust Watermarking Algorithm to Resist Geometric Attacks

Author: GongZuo
Tutor: HanTaiLin
School: Changchun University of Science and Technology
Course: Information and Communication Engineering
Keywords: e-ticket digital digital watermarking technology digital image processing wavelet analysis robustness
CLC: TP309.7
Type: Master's thesis
Year: 2014
Downloads: 6
Quote: 0
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Abstract


With the rapid socio-economic development, sustainable development faces serious environmental problems, many places such as area, are beginning to implement a comprehensive promotion and application of electronic notes, however, because the electronic ticket is80%of disputes because the electronic voting fraud, and how ensure the uniqueness of an electronic ticket, completeness became critical. The use of digital watermarking to add is to protect the uniqueness of the electronic ticket is a good way. Thus enhancing the ability of the watermark damage resistance geometry’, the detected watermark has better robustness research has become critical.In this paper, based on digital watermarking based on the development in recent years, presents a wavelet-based watermark embedding and detection of digital image watermarking scheme. In digital image processing based on research from the Fourier transform to the wavelet transform, to transform continuous wavelet transform modulus maximum coefficient, Mexico hat, multi-scale analysis and Mallat decomposition and reconstruction algorithm. CWT resistance RST based digital image watermarking algorithm robust, select the domain of geometric invariant continuous wavelet transform domain as a digital watermark embedding domain, containing the enhanced digital watermark image while ensuring the security of the digital watermark invisibility, innovation in the digital watermark embedding and extraction process will change transform modulus maximum coefficient and use Mexico hat scaling achieve the desired effect.After testing and comparing experimental results show enhanced anti-watermark eliminate performance, making detection of the watermark has better robustness, concealment and security, with a geometry can effectively resist destruction capabilities.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality > Encryption and decryption
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