FIXED-POINT

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REDUCING STAIRCASING ARTIFACTS IN SPECT RECONSTRUCTION BY AN INFIMAL CONVOLUTION REGULARIZATION被引量:1
《Journal of Computational Mathematics》2016年第6期626-647,共22页Zhifeng Wu Si Li Xueying Zeng Andrzej Krol 
The purpose of this paper is to investigate the ability of the infimal convolution regular- ization in curing the staircasing artifacts of the TV model in the SPECT reconstruction. We formulate the problem of SPECT re...
关键词:SPECT Infimal Convolution Regularization Staircasing Artifacts Fixed-pointProximity Algorithm. 
FIXED-POINT CONTINUATION APPLIED TO COMPRESSED SENSING:IMPLEMENTATION AND NUMERICAL EXPERIMENTS被引量:7
《Journal of Computational Mathematics》2010年第2期170-194,共25页Elaine T.Hale 
supported by an NSF VIGRE grant (DMS-0240058);supported in part by NSF CAREER Award DMS-0748839 and ONR Grant N00014-08-1-1101;supported in part by NSF Grant DMS-0811188 and ONR Grant N00014-08-1-1101
Fixed-point continuation (FPC) is an approach, based on operator-splitting and continuation, for solving minimization problems with l1-regularization:min ||x||1+uf(x).We investigate the application of this a...
关键词:l1 regularization Fixed-point algorithm CONTINUATION Compressed sensing Numerical experiments. 
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