Sparse reconstructions from few noisy data: analysis of hierarchical Bayesian models with generalized gamma hyperpriors
Sparse reconstructions from few noisy data: analysis of hierarchical Bayesian models with generalized gamma hyperpriors
复制标题
来自少量噪声数据的稀疏重建:具有广义伽马超先验的分层贝叶斯模型分析
DOI:
10.1088/1361-6420/ab4d92
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发表时间:
2020
期刊:
影响因子:
2.1
通讯作者:
Strang, Alexander
中科院分区:
文献类型:
--
作者:
Calvetti, Daniela;Pragliola, Monica;Somersalo, Erkki;Strang, Alexander
Solving inverse problems with sparsity promoting regularizing penalties can be recast in the Bayesian framework as finding a maximum a posteriori (MAP) estimate with sparsity promoting priors. In the latter context, a computationally convenient choice of prior is the family of conditionally Gaussian hierarchical models for which the prior variances of the components of the unknown are independent and follow a hyperprior from a generalized gamma family. In this paper, we analyze the optimization problem behind the MAP estimation and identify hyperparameter combinations that lead to a globally or locally convex optimization problem. The MAP estimation problem is solved using a computationally efficient alternating iterative algorithm. Its properties in the context of the generalized gamma hypermodel and its connections with some known sparsity promoting penalty methods are analyzed. Computed examples elucidate the convergence and sparsity promoting properties of the algorithm.
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DOI:
--
发表时间:
2009-12
期刊:
2009 17th European Signal Processing Conference
影响因子:
--
作者:
S. D. Babacan;L. Mancera;R. Molina;A. Katsaggelos
通讯作者:
S. D. Babacan;L. Mancera;R. Molina;A. Katsaggelos
影响因子:
2.1
作者:
Calvetti, Daniela;Hakula, Harri;Somersalo, Erkki
通讯作者:
Somersalo, Erkki
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
D. Calvetti
通讯作者:
D. Calvetti
DOI:
10.1137/16m108272x
发表时间:
2017
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
D. Calvetti;F. Pitolli;J. Prezioso;E. Somersalo;B. Vantaggi
通讯作者:
B. Vantaggi
DOI:
10.1073/pnas.0437847100
发表时间:
2003-03-04
影响因子:
11.1
作者:
Donoho, DL;Elad, M
通讯作者:
Elad, M