Multilevel Threshold Based Image Denoising in Curvelet Domain

In this paper, we propose a multilevel thresholding technique for noise removal in curvelet transform domain which uses cycle-spinning. Most of uncorrelated noise gets removed by thresholding curvelet coeffcients at lowest level, while correlated noise gets removed by only a fraction at lower levels, so we used multilevel thresholding on curvelet coe?cients. The threshold in the proposed method depends on the variance of curvelet coeffcients, the mean and the median of absolute curvelet coeffcients at a par...