A Study Of Binary Image Watermark Based On The Chaotic And Genetic Algorithm

With the development of computer network and multimedia technology, multimedia data has gradually become an important way to get information. Subsequently, the side-effect is : some individuals or groups copied, transferred, amended and even sold the digital media without the permission of copyright owners, which greatly damaged the copyrights and commercial benefits of owners.Therefore, the problem how protect the copyright has become a hot in research work. To better accommodate the digital media's unique character. Satisfying the date security and copyright .People is searching for new technology and method.The encryption of digital image was derived from the early classical encryption theoties.The purpose of it was to change a given image into an out-of-order image in space domain or in frequency domain by a rule so that the real information of the image itself was hidden. Digital watermarking technology as an effective means of knowledge copyright protection is widely studied and used. It embeds some secret messages---watermarks into the media to protect the property or integrality of the working so that digital produces can resist being copied, tampered and so on.In the paper, main work is as follows:(1) Introduces the research situation and development prospect of the art of information hiding and digital watermarking; Describes the general character of digital watermarking; Summarizes the classification of digital watermarking system. Summarize the ideal of the frequency domain watermarking algorithm and spatial domain watermarking algorithm, and analyze the advantages and defaults; Builds the mosaic and check model of the watermarking algorithm; Presents the attack methods of watermarking.(2) Discuss the basic concept and treatment process of the Chaos and Cellular Automata., studies on the digital image encryption algorithms based on the watermark technology which produced by Cellular Automata.(3) In order to resolve the robustness of spacial domain in process of signal and the uncertainness of frequency domain in selecting the parameter and strength factor embedded, this paper brings up a novel digital watermarking based on genetic algorithms, improves the defaults of the frequency domain watermarking algorithm and spatial domain watermarking algorithm, A great lot of experiments show that it can recovery the watermarking image when the watermarking is aggressed. Compared with the technical background, it is of better invisibility and robustness.