Digital Watermarking Matlab code
2016-08-23
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For color image, Hypercomplex presents a color image Watermarking algorithm in the frequency domain. It passed on the Hypercomplex Fast Fourier transform with a color image, in a very complex frequency-domain select the appropriate band watermark, and modify the values of the symmetry coefficient, enable watermark graphics you can still use the red, green, and blue values of the color images for transmission. Analysis shows that the proposed method by means of a complex number inverse Fourier transform, you can bring the error diffusion to the image watermarking, and was distributed to each of the red, green, and blue color components, so as to realize the digital watermark is not easy to perceive and secure a good combination. This also puts the watermark data is "cross-redundancy embedded" rule, in order to further improve the robustness of digital watermarking. Last experimental results proved the superiority of this algorithm
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