A hybrid filter for the cancellation of mixed Gaussian noise and impulse noise

A hybrid filter for mixed noise cancellation is introduced in this paper. The proposed approach combines the advantages of the improved adaptive Wiener filter and bilinear interpolation filter, which can efficiently reduce both the white Gaussian noise and impulse noise. To select the corresponding filters with respect to the noise types, a novel method for impulse noise detection is also designed. Experimental and comparison results show that the proposed approach is particularly effective in removing the mixed Gaussian and impulse noises even with the severe contamination.