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Improved Patch-based View Rendering for Focused Plenoptic Cameras with Extended Depth-of-Field

2021-01Comunicação em conferência Acesso aberto
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datacite.subject.fosCiências Naturais::Ciências da Computação e da Informação
datacite.subject.fosEngenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática
datacite.subject.sdg10:Reduzir as Desigualdades
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
dc.contributor.authorFilipe, Jose N.
dc.contributor.authorAssuncao, Pedro A. A.
dc.contributor.authorTavora, Luis M. N.
dc.contributor.authorFonseca-Pinto, Rui
dc.contributor.authorThomaz, Lucas A.
dc.contributor.authorFaria, Sergio M. M.
dc.date.accessioned2026-04-09T10:45:10Z
dc.date.available2026-04-09T10:45:10Z
dc.date.issued2021-01
dc.descriptionEISBN - 978-9-0827-9705-3
dc.descriptionDate of Conference: 18-21 January 2021
dc.descriptionLink para o documento: https://new.eurasip.org/Proceedings/Eusipco/Eusipco2020/pdfs/0000680.pdf
dc.description.abstractThis paper proposes a patch-based framework to improve view rendering from light fields captured by focused plenoptic cameras with extended depth-of-field. A three-step approach is performed to minimise discontinuities across neighbouring patches and to maximise the information captured from different types of micro-lens. Firstly, the useful patch size of each micro-image is determined to limit the contribution of low light intensity regions into the rendered images. Secondly, anisotropic inpainting is applied to smooth the discontinuities between neighbouring patches. Thirdly, a multi-focus image fusion algorithm is used to efficiently combine the information captured by the different types of micro-lens comprising plenoptic cameras with extended depth-of-field. Significant improvements are obtained in the rendered views, by reducing visible discontinuities between adjacent micro-images, while at the same time increasing the average sharpness of image content by 20%, measured by the Energy of Laplacian (i.e., a focus metric), in comparison to the conventional rendering approach, which always selects the best focused lens type.eng
dc.description.sponsorshipThis work was supported by Programa Operacional Regional do Centro, project PLenoISLA POCI-01-0145-FEDER-028325 and by FCT/MCTES through national funds and when applicable co-funded EU funds under the project UIDB/EEA/50008/2020, Portugal.
dc.identifier.citationJ. N. Filipe, P. A. A. Assuncao, L. M. N. Tavora, R. Fonseca-Pinto, L. A. Thomaz and S. M. M. Faria, "Improved Patch-based View Rendering for Focused Plenoptic Cameras with Extended Depth-of-Field," 2020 28th European Signal Processing Conference (EUSIPCO), Amsterdam, Netherlands, 2021, pp. 680-684, doi: https://doi.org/10.23919/Eusipco47968.2020.9287562.
dc.identifier.doi10.23919/eusipco47968.2020.9287562
dc.identifier.eissn2076-1465
dc.identifier.isbn978-1-7281-5001-7
dc.identifier.isbn978-9-0827-9705-3
dc.identifier.issn2219-5491
dc.identifier.urihttp://hdl.handle.net/10400.8/16080
dc.language.isoeng
dc.peerreviewedyes
dc.publisherIEEE Canada
dc.relation.hasversionhttps://ieeexplore.ieee.org/document/9287562
dc.relation.ispartof2020 28th European Signal Processing Conference (EUSIPCO)
dc.rights.uriN/A
dc.subjectPatch-based rendering
dc.subjectFocused plenoptic camera
dc.subjectExtended depth-of-field
dc.titleImproved Patch-based View Rendering for Focused Plenoptic Cameras with Extended Depth-of-Fieldeng
dc.typeconference paper
dspace.entity.typePublication
oaire.citation.conferenceDate2021-01
oaire.citation.conferencePlaceAmsterdam, Netherlands
oaire.citation.endPage684
oaire.citation.startPage680
oaire.citation.titleEuropean Signal Processing Conference
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameAssunção
person.familyNamede Oliveira Pegado de Noronha E Távora
person.familyNameFonseca-Pinto
person.familyNameThomaz
person.familyNameFaria
person.givenNamePedro
person.givenNameLuís Miguel
person.givenNameRui
person.givenNameLucas
person.givenNameSergio
person.identifier.ciencia-id6811-3984-C17B
person.identifier.ciencia-id121C-FADA-D750
person.identifier.ciencia-id681D-C547-B184
person.identifier.ciencia-id8815-4101-28DD
person.identifier.orcid0000-0001-9539-8311
person.identifier.orcid0000-0002-8580-1979
person.identifier.orcid0000-0001-6774-5363
person.identifier.orcid0000-0002-1004-7772
person.identifier.orcid0000-0002-0993-9124
person.identifier.ridA-4827-2017
person.identifier.ridK-9449-2014
person.identifier.ridC-5245-2011
person.identifier.scopus-author-id6701838347
person.identifier.scopus-author-id26039086400
person.identifier.scopus-author-id14027853900
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This paper proposes a patch-based framework to improve view rendering from light fields captured by focused plenoptic cameras with extended depth-of-field. A three-step approach is performed to minimise discontinuities across neighbouring patches and to maximise the information captured from different types of micro-lens. Firstly, the useful patch size of each micro-image is determined to limit the contribution of low light intensity regions into the rendered images. Secondly, anisotropic inpainting is applied to smooth the discontinuities between neighbouring patches. Thirdly, a multi-focus image fusion algorithm is used to efficiently combine the information captured by the different types of micro-lens comprising plenoptic cameras with extended depth-of-field. Significant improvements are obtained in the rendered views, by reducing visible discontinuities between adjacent micro-images, while at the same time increasing the average sharpness of image content by 20%, measured by the Energy of Laplacian (i.e., a focus metric), in comparison to the conventional rendering approach, which always selects the best focused lens type.
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