A adaptive de-noising method used to image with mixed noises
WU You-fu · Information technology newsletter · 2007
The de-noising method by threshold based on wavelet transform is only used to remove Gaussian white noise and invalid to remove impulse noise,and orthogonal wavelet transform can get result with Gauss noise,but may produce artifacts on discontinuities of signal.Which causes image edge distortion seriously. The reason is that the de-noising algorithm lacks of wavelet translation invariant.This paper proposes the de-noising method that the median filter in company with the stationary wavelet adaptive threshold algorithm at the same time,this method can effectively remove fixed noises of the Gaussian white noise and impulse noise.The validity of algorithm is proved.