Composite method for image adaptive wiener filtering
Xing Jing-hong · Computer Engineering and Applications Journal · 2010
Using the characteristics of wavelet domain adaptive Wiener filtering and spatial domain adaptive Wiener filtering,this paper presents a combined filtering method based on an adaptive Wiener filtering in wavelet domain and an adaptive Wiener filter in spatial domain.Firstly a pre-denoised image is obtained with the thresholding denoising in wavelet domain and the residual noise variance of that is re-estimated.Then an adaptive Wiener filtering in spatial domain is applied to the reconstruct-ed image to improve the accuracy.Computer simulation results show that,compared with a separate wavelet and spatial domain Wiener filteringt,he mean squared error of the proposed method is the smallest and it obtains better denoising results.