Automatic hard thresholding for sparse signal reconstruction from NDE measurements Dogandžić, Aleksandar Qiu, Kun
dc.contributor.department Center for Nondestructive Evaluation 2018-02-13T06:11:05.000 2020-06-30T01:25:46Z 2020-06-30T01:25:46Z Fri Jan 01 00:00:00 UTC 2010 2013-02-12 2009-07-01
dc.description.abstract <p>We propose an automatic hard thresholding (AHT) method for sparse‐signal reconstruction. The measurements follow an underdetermined linear model, where the regression‐coefficient vector is modeled as a superposition of an unknown deterministic sparse‐signal component and a zero‐mean white Gaussian component with unknown variance. Our method demands no prior knowledge about signal sparsity. Our AHT scheme approximately maximizes a generalized maximum likelihood (GML) criterion, providing an approximate GML estimate of the signal sparsity level and an empirical Bayesian estimate of the regression coefficients. We apply the proposed method to reconstruct images from sparse computerized tomography projections and compare it with existing approaches.</p>
dc.description.comments <p>Copyright 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.</p> <p>This article appeared in <em>AIP Conference Proceedings </em>1211 (2010): 806–813 and may be found at <a href=""></a>.</p>
dc.identifier archive/
dc.identifier.articleid 1072
dc.identifier.contextkey 3689948
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath cnde_conf/62
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 01:17:43 UTC 2022
dc.subject.disciplines Materials Science and Engineering
dc.subject.disciplines Structures and Materials
dc.subject.keywords nondestructive testing
dc.subject.keywords numerical analysis
dc.subject.keywords matrix algebra
dc.subject.keywords nondestructive evaluation
dc.subject.keywords QNDE
dc.title Automatic hard thresholding for sparse signal reconstruction from NDE measurements
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isOrgUnitOfPublication f2b877c3-5654-4c6a-9e64-6c944f9f02b6
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