Speckle noise reduction of SAR image based on DT-CWT
Min Xu · Cehui kexue · 2010
The existing of speckle noise severely affects the use of SAR image for people.This paper gave an image de-noising idea by Bayesian shrink based on DT-CWT.It obtained more direction characteristic by used DT-CWT,and shrank the coefficients to suppress the speckles by Bayesian MAP.The implementation showed that the method not only restrained the noise but also preserved the edge information of the image.