SAR Image Denosing Based on Wavelet-Domain Gaussian-Cauchy Mixture Model
Jun Zhang, Song Hong · Journal of the Graduate School of the Chinese Academy of Sciences · 2006
SαS(Symmetric alpha-Stable) model is an accurate image model in wavelet-domain.But this method needs lots of computation.In this paper,a new model,Gaussian-Cauchy model,was proposed on the base of SαS model.Using this model characterizing the real-world images prior model can reduce computations obviously.In addition,the logarithm transformation changes its statistical characteristic,so we must adjust the mean in the process.Experimental results show that there is almost no difference between this model and SαS model in edges,SNR(signal to noise ratio) and subjective visual effect.