(2018.07.02 10:00am N205)Jiehua Zhu:Semisoft Generalized I1I1 Greedy Algorithm for CT Image Reconstruction
Time：2018-06-25 Source：KLMM
Title： Semisoft Generalized I1I1 Greedy Algorithm for CT Image Reconstruction
Speaker： Jiehua Zhu (Georgia Southern University, USA)
Time&Venue： 2018.07.02 10:00am N205
Abstract:： In this talk, a generalized I1I1 greedy algorithm for signal and image recovery is first introduced. Its convergence and the superiority over the reweighted -minimization and greedy algorithms are demonstrated. Then this algorithm is extended as a semisoft generalized 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.
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