This paper proposed different thresholds based on Bayesian framework for different subbands and orientations combined with improved soft threshold function.Meanwhile

this paper used two wavelets to get weighted average final image.Experiments show that this method remains more grain and raise PSNR form 0.1 to 1.45dB.It was effective when comparing with Visushrink

Sureshrink

Bayesshrink and Wiener filtering.