  According to the character of Gaussian, we modify the Rank-Ordered Absolute
Differences (ROAD) to Rank-Ordered Absolute Differences of mixture of Gaussian
and impulse noises (ROADG). It will be more effective to detect impulse noise
when the impulse is mixed with Gaussian noise. Combining rightly the ROADG with
Optimal Weights Filter (OWF), we obtain a new method to deal with the mixed
noise, called Optimal Weights Mixed Filter (OWMF). The simulation results show
that the method is effective to remove the mixed noise.
