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A Noise Removal Model with Anisotropic Diffusion based on Visual Gradient

In recent years considerable amount of researchers have been devoted to anisotropic diffusion method and achieved a series of important development. However, human visual system which perceived and interpreted images has been paid little attention to in all these models. In this paper, we define a visual gradient, which is looked as a generalization of the image gradient. After that we substitute the visual gradient for the image gradient in the anisotropic diffusion model to keep to some extent consistent with human visual system for the first time. Finally numerical results show the proposed method’s performance.