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Light field image Coding using high-order intrablock prediction

dc.contributor.authorMonteiro, Ricardo J. S.
dc.contributor.authorNunes, Paulo J. L.
dc.contributor.authorRodrigues, Nuno M. M.
dc.contributor.authorFaria, Sérgio M. M. de
dc.date.accessioned2018-05-03T11:00:51Z
dc.date.available2018-05-03T11:00:51Z
dc.date.issued2017-10
dc.description.abstractThis paper proposes a two-stage high-order intrablock prediction method for light field image coding. This method exploits the spatial redundancy in lenslet light field images by predicting each image block, through a geometric transformation applied to a region of the causal encoded area. Light field images comprise an array of microimages that are related by complex geometric transformations that cannot be efficiently compensated by state-of-the-art image coding techniques, which are usually based on low-order translational prediction models. The two-stage nature of the proposed method allows us to choose the order of the prediction model most suitable for each block, ranging from pure translations to projective or bilinear transformations, optimized according to an appropriate rate-distortion criterion. The proposed higher order intrablock prediction approach was integrated into a high efficiency video coding (HEVC) codec and evaluated for both unfocused and focused light field camera models, using different resolutions and microlens arrays. Experimental results show consistent bitrate savings, which can go up to 12.62%, when compared to a lower order intrablock prediction solution and 49.82% when compared to HEVC still picture coding.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1109/JSTSP.2017.2721358pt_PT
dc.identifier.issn1932-4553
dc.identifier.urihttp://hdl.handle.net/10400.8/3231
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherInstitute of Electrical and Electronics Engineerspt_PT
dc.relation.publisherversionhttps://ieeexplore.ieee.org/document/7961268/pt_PT
dc.subjectImage codingpt_PT
dc.subjectLight field image processingpt_PT
dc.subjectHigh efficiency video codingpt_PT
dc.subjectRedundancypt_PT
dc.subjectPredictive modelspt_PT
dc.titleLight field image Coding using high-order intrablock predictionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FEEA%2F50008%2F2013/PT
oaire.citation.endPage1131pt_PT
oaire.citation.issue7pt_PT
oaire.citation.startPage1120pt_PT
oaire.citation.titleIEEE Journal of Selected Topics in Signal Processingpt_PT
oaire.citation.volume11pt_PT
oaire.fundingStream5876
person.familyNameM. M. Rodrigues
person.givenNameNuno
person.identifier.orcid0000-0001-9536-1017
person.identifier.scopus-author-id7006052345
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationb4ebe652-7f0e-4e67-adb0-d5ea29fc9e69
relation.isAuthorOfPublication.latestForDiscoveryb4ebe652-7f0e-4e67-adb0-d5ea29fc9e69
relation.isProjectOfPublicationf047085f-2057-404f-992e-a4f6ee3db7b3
relation.isProjectOfPublication.latestForDiscoveryf047085f-2057-404f-992e-a4f6ee3db7b3

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