Application Of Non-linear Theory In Digital Watermarking And Simulation Plants

In this paper, based on the chaos and fractal theory which is the kernel of the non-linear theory, the research has studied the application of the non-linear theory in digital watermarking and simulation of the scenery as follows:Based on the Hilbert fractal curve and Iterative Chaotic Map with Infinite Collapses (ICMIC) a novel image spatial domain digital watermarking algorithm is proposed. The proposed scheme considers the features of the human vision system (HVS) very richly. By dealing with the original image the texture domain can be separated from the original image very easily. By using the strategy of minimizing changes of host image pixels and statistical method, we achieve the results that the digital watermarking is sightless. The experimental results show that the algorithm has better robustness and fidelity.Using the theory of chaos encryption and DWT, a binary image wavelet watermarking algorithm is improved. First, the original watermarks are scrambled by the chaos mapping and fractal curve which makes the watermarks have the trait of the cryptogram. Then, the watermarks are embedded into the wavelet coefficients by using the improved binary operation methods. The detection process uses the statistical method and does not need the original image. The final experiment results demonstrate the validity of the scheme.Based on the fractal image encoding and decoding theory, a novel fractal image digital watermarking algorithm is presented. The watermarks are embedded into every pixel of the range block which makes the tampering become very hard. Using the strategy of the best match in the embedding process, the complexity is minished. The reconstructed image has been showed very clearly. Simulation results show the superior performance of the methods and demonstrate the robustness against the image attack.Based on the single-formula of the L-systems, we proposed the theory of the pseudo L-systems which is the multi-formula. When the randomicity of the edges is considered we can get the ideal scenery. The theory of the context-sensitive L-systems is also extended. When the controlling parameters are considered the pictures can be changed artificially. Here, we get much living and dynamic scenery.