The de-noising method by threshold based on wavelet transform is only used to remove Gaussian White Noise and invalid to remove impulse noise This paper proposes the de-noising method that combines wavelet adaptive threshold algorithm and median filter.This method can effectively remove fixed noises of the Gaussian White Noise and impulse noise.The simulation experiment shows that the Peak Signal-Noise Ratio of de-noising image is increased 1~2 dB,and the validity of this algorithm is demonstrated.
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