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A Weighted Two-Level Bregman Method with Dictionary Updating for Nonconvex MR Image Reconstruction
Nonconvex optimization has shown that it needs substantially fewer measurements than l (1) minimization for exact recovery under fixed transform/overcomplete dictionary. In this work, two efficient numerical algorithms which are unified by the method named weighted two-level Bregman method with dict...
| Autores principales: | , , , , |
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
| Publicado: |
Hindawi Publishing Corporation
2014
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| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4241317/ https://www.ncbi.nlm.nih.gov/pubmed/25431583 http://dx.doi.org/10.1155/2014/128596 |