Title: Semisoft Generalized Total Variation Minimization for Image Reconstruction in Computed Tomography
Speaker: Jiehua Zhu（朱洁华）, Department of Mathematical Sciences, Georgia Southern University
时间: 9:00-10:00, 26/06/2018
Abstract: In this talk, a generalized l1 greedy algorithm for signal and image recovery is first introduced. Its convergence and the superiority over the reweighted l1 -minimization and l1 greedy algorithms are demonstrated. Then this algorithm is extended as a semisoft generalized l1 greedy algorithm by adapting the wavelet technique of semisoft thresholding. The extended algorithm is applied to image reconstruction by incorporating it into the BCPCS framework, resulting in a semisoft generalized total variation minimization algorithm for computed tomography (CT). Numerical tests indicate the proposed algorithm improves the image reconstruction for CT.