As the traditional pure anisotropic diffusion model(1order derivative used by the gradient) brings "staircase effect" by excessive diffusion in smooth regions
and the 4-order PDE(2-order derivative used by the Laplacian) model suffers poor denoising effect
an adaptive image denoising model of anisotropic diffusion based on fractional derivative was proposed.As a locally adaptive process
the proposed model adopts different regularization constraints in different parts of the image.Experimental results show that the new model not only efficiently remove noise
but also retain the edge and detail information.Better quality and visual effects of the image is achieved with this model.
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references
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