STUDY ON THE ENHANCEMENT AND DENOISING OF MAMMOGRAMS
乳腺X线图像的增强与噪声抑制研究

A new algorithm for mammograms enhancement and denoising based on multiscale geometric analysis(MGA) was proposed.Firstly,mammograms were decomposed into different scales and directional subbands by using nonsubsampled contourlet transform(NSCT).After modeling the coefficients of each directional subbands and using generalized gaussian mixture model(GGMM) according to the statistical property of the transform coefficients,they were categorized into strong edges,weak edges and noise by Bayesian classifier.A ...