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http://hdl.handle.net/2445/9222
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DC Field | Value | Language |
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dc.contributor.author | Núñez de Murga, Jorge, 1955- | cat |
dc.contributor.author | Llacer, Jorge | cat |
dc.date.accessioned | 2009-08-28T08:23:48Z | - |
dc.date.available | 2009-08-28T08:23:48Z | - |
dc.date.issued | 1998 | cat |
dc.identifier.issn | 0365-0138 | cat |
dc.identifier.uri | http://hdl.handle.net/2445/9222 | - |
dc.description.abstract | In this paper we present a Bayesian image reconstruction algorithm with entropy prior (FMAPE) that uses a space-variant hyperparameter. The spatial variation of the hyperparameter allows different degrees of resolution in areas of different statistical characteristics, thus avoiding the large residuals resulting from algorithms that use a constant hyperparameter. In the first implementation of the algorithm, we begin by segmenting a Maximum Likelihood Estimator (MLE) reconstruction. The segmentation method is based on using a wavelet decomposition and a self-organizing neural network. The result is a predetermined number of extended regions plus a small region for each star or bright object. To assign a different value of the hyperparameter to each extended region and star, we use either feasibility tests or cross-validation methods. Once the set of hyperparameters is obtained, we carried out the final Bayesian reconstruction, leading to a reconstruction with decreased bias and excellent visual characteristics. The method has been applied to data from the non-refurbished Hubble Space Telescope. The method can be also applied to ground-based images. | eng |
dc.format.extent | 14 p. | cat |
dc.format.mimetype | application/pdf | eng |
dc.language.iso | eng | eng |
dc.publisher | EDP Sciences | cat |
dc.relation.isformatof | Reproducció del document publicat a http://dx.doi.org/10.1051/aas:1998259 | cat |
dc.relation.ispartof | Astronomy and Astrophysics Supplement Series, 1998, vol. 131, núm. 2, p. 167-180. | cat |
dc.relation.uri | http://dx.doi.org/10.1051/aas:1998259 | - |
dc.rights | (c) The European Southern Observatory, 1998 | cat |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Processament de dades | cat |
dc.subject.classification | Anàlisi de dades | cat |
dc.subject.classification | Estadística bayesiana | cat |
dc.subject.other | Image processing | eng |
dc.subject.other | Data analysis | eng |
dc.title | Bayesian image reconstruction with space-variant noise suppression | eng |
dc.type | info:eu-repo/semantics/article | eng |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 500848 | cat |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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500848.pdf | 491.38 kB | Adobe PDF | View/Open |
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