A New Local Adaptive Wavelet Image De-noising Method
Shixin Li, Zhang Xinghui, Wang Jianming · 2011
In order to improve the signal to noise ratio of image, a local adaptive Wiener filter in wavelet domain is applied to a 2-D image. Several 1-D windows could be constructed on the direction character of sub-image in the filter window after wavelet transform. Then the adaptive filters could be obtained from the 1-D windows. With the effective weighted combination of filters in different 1-Dwindows, the sub-image local adaptive filters are generated. And the simulation of the adaptive filter shows it could remove the white noise of image and preserve the edge of images effectively.