الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
Intellectual property protection of digital data has been an important task due to the rabid growth of multimedia data distribution and the wide availability of the information via global networks. Recently, digital watermarking has been proposed as a solution to the problem of resolving copyright ownership of multimedia content. For digital image watermarking scheme, to be an effective tool for intellectual property protection, it must satisfy the requirements of image quality, watermark robustness and capacity, embedding security and extraction flexibility. The work presented in this thesis is concerned with the mentioned requirements for designing a robust digital image watermarking algorithm for copyright protection.
This thesis introduces a high-capacity second generation based watermarking scheme, which takes the consideration of good image quality and blind extraction. Firstly, the host image is normalized by fast technique to resist geometric attacks and reduce the computational time. The normalized image is then transformed using parametric bi-orthogonal integer lifting wavelet transform (LWT) to increase security. Finally, the high-capacity watermark is embedded carefully into the salient features by utilizing least significant bits (LSBs) method to maximize the robustness and quality. Experimental results show the reliability of the proposed scheme against variety kinds of attacks including image processing attacks such as removal and interference and geometric attacks like rotation, scaling, shearing and cropping.