Fast super-resolution via dense local training and inverse regressor search
Regression-based Super-Resolution (SR) addresses the upscaling problem by learning a mapping function (i.e. regressor) from the low-resolution to the high-resolution manifold. Under the locally linear assumption, this complex non-linear mapping can be properly modeled by a set of linear regressors d...
| Autores: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/27529 |
| Acceso en línea: | https://hdl.handle.net/2117/27529 https://dx.doi.org/10.1007/978-3-319-16811-1_23 |
| Access Level: | acceso abierto |
| Palabra clave: | Computer vision Image processing Visió per ordinador Imatges -- Processament Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament de la imatge i del senyal vídeo Àrees temàtiques de la UPC::So, imatge i multimèdia::Creació multimèdia::Imatge digital |
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Fast super-resolution via dense local training and inverse regressor searchPérez-Pellitero, EduardoSalvador, JordiTorres-Xirau, IbanRuiz Hidalgo, Javier|||0000-0001-6774-685XRosenhahn, BodoComputer visionImage processingVisió per ordinadorImatges -- ProcessamentÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament de la imatge i del senyal vídeoÀrees temàtiques de la UPC::So, imatge i multimèdia::Creació multimèdia::Imatge digitalRegression-based Super-Resolution (SR) addresses the upscaling problem by learning a mapping function (i.e. regressor) from the low-resolution to the high-resolution manifold. Under the locally linear assumption, this complex non-linear mapping can be properly modeled by a set of linear regressors distributed across the manifold. In such methods, most of the testing time is spent searching for the right regressor within this trained set. In this paper we propose a novel inverse-search approach for regression-based SR. Instead of performing a search from the image to the dictionary of regressors, the search is done inversely from the regressors’ dictionary to the image patches. We approximate this framework by applying spherical hashing to both image and regressors, which reduces the inverse search into computing a trained function. Additionally, we propose an improved training scheme for SR linear regressors which improves perceived and objective quality. By merging both contributions we improve speed and quality compared to the state-of-the-art.Peer Reviewed20142014-11-0120152015-04-22journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/27529https://dx.doi.org/10.1007/978-3-319-16811-1_23reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/275292026-05-27T15:37:01Z |
| dc.title.none.fl_str_mv |
Fast super-resolution via dense local training and inverse regressor search |
| title |
Fast super-resolution via dense local training and inverse regressor search |
| spellingShingle |
Fast super-resolution via dense local training and inverse regressor search Pérez-Pellitero, Eduardo Computer vision Image processing Visió per ordinador Imatges -- Processament Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament de la imatge i del senyal vídeo Àrees temàtiques de la UPC::So, imatge i multimèdia::Creació multimèdia::Imatge digital |
| title_short |
Fast super-resolution via dense local training and inverse regressor search |
| title_full |
Fast super-resolution via dense local training and inverse regressor search |
| title_fullStr |
Fast super-resolution via dense local training and inverse regressor search |
| title_full_unstemmed |
Fast super-resolution via dense local training and inverse regressor search |
| title_sort |
Fast super-resolution via dense local training and inverse regressor search |
| dc.creator.none.fl_str_mv |
Pérez-Pellitero, Eduardo Salvador, Jordi Torres-Xirau, Iban Ruiz Hidalgo, Javier|||0000-0001-6774-685X Rosenhahn, Bodo |
| author |
Pérez-Pellitero, Eduardo |
| author_facet |
Pérez-Pellitero, Eduardo Salvador, Jordi Torres-Xirau, Iban Ruiz Hidalgo, Javier|||0000-0001-6774-685X Rosenhahn, Bodo |
| author_role |
author |
| author2 |
Salvador, Jordi Torres-Xirau, Iban Ruiz Hidalgo, Javier|||0000-0001-6774-685X Rosenhahn, Bodo |
| author2_role |
author author author author |
| dc.subject.none.fl_str_mv |
Computer vision Image processing Visió per ordinador Imatges -- Processament Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament de la imatge i del senyal vídeo Àrees temàtiques de la UPC::So, imatge i multimèdia::Creació multimèdia::Imatge digital |
| topic |
Computer vision Image processing Visió per ordinador Imatges -- Processament Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament de la imatge i del senyal vídeo Àrees temàtiques de la UPC::So, imatge i multimèdia::Creació multimèdia::Imatge digital |
| description |
Regression-based Super-Resolution (SR) addresses the upscaling problem by learning a mapping function (i.e. regressor) from the low-resolution to the high-resolution manifold. Under the locally linear assumption, this complex non-linear mapping can be properly modeled by a set of linear regressors distributed across the manifold. In such methods, most of the testing time is spent searching for the right regressor within this trained set. In this paper we propose a novel inverse-search approach for regression-based SR. Instead of performing a search from the image to the dictionary of regressors, the search is done inversely from the regressors’ dictionary to the image patches. We approximate this framework by applying spherical hashing to both image and regressors, which reduces the inverse search into computing a trained function. Additionally, we propose an improved training scheme for SR linear regressors which improves perceived and objective quality. By merging both contributions we improve speed and quality compared to the state-of-the-art. |
| publishDate |
2014 |
| dc.date.none.fl_str_mv |
2014 2014-11-01 2015 2015-04-22 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 AM http://purl.org/coar/version/c_ab4af688f83e57aa |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2117/27529 https://dx.doi.org/10.1007/978-3-319-16811-1_23 |
| url |
https://hdl.handle.net/2117/27529 https://dx.doi.org/10.1007/978-3-319-16811-1_23 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
application/pdf |
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reponame:UPCommons. Portal del coneixement obert de la UPC instname:Universitat Politècnica de Catalunya (UPC) |
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Universitat Politècnica de Catalunya (UPC) |
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UPCommons. Portal del coneixement obert de la UPC |
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UPCommons. Portal del coneixement obert de la UPC |
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| repository.mail.fl_str_mv |
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| _version_ |
1869415910965510144 |
| score |
15.300724 |