Modified biased anisotropic diffusion processing of noisy color images

In this paper a new approach to the problem of noise reduction in color images is presented. The novel technique is based on a modification of the biased anisotropic diffusion. In the modified iterative scheme, the original noisy signal embedded in the biased anisotropic diffusion framework is replaced by an image processed by a nonlinear multichannel filter. The experiments revealed, that the proposed solution significantly excels over the standard anisotropic diffusion methods in case of the mixed Gaussian and impulse noise contaminating the color image. The main benefits of the proposed approach are its rapid convergence to the final stable state, low computational complexity and good performance in complex noise scenarios.