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Light field image coding with flexible viewpoint scalability and random access

2021-05Journal article Restricted access
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dc.contributor.authorMonteiro, Ricardo J. S.
dc.contributor.authorRodrigues, Nuno M. M.
dc.contributor.authorFaria, Sérgio M. M.
dc.contributor.authorNunes, Paulo J. L.
dc.date.accessioned2021-03-18T17:10:14Z
dc.date.available2021-03-18T17:10:14Z
dc.date.issued2021-05
dc.date.updated2021-03-18T10:52:38Z
dc.description.abstractThis paper proposes a novel light field image compression approach with viewpoint scalability and random access functionalities. Although current state-of-the-art image coding algorithms for light fields already achieve high compression ratios, there is a lack of support for such functionalities, which are important for ensuring compatibility with different displays/capturing devices, enhanced user interaction and low decoding delay. The proposed solution enables various encoding profiles with different flexible viewpoint scalability and random access capabilities, depending on the application scenario. When compared to other state-of-the-art methods, the proposed approach consistently presents higher bitrate savings (44% on average), namely when compared to pseudo-video sequence coding approach based on HEVC. Moreover, the proposed scalable codec also outperforms MuLE and WaSP verification models, achieving average bitrate saving gains of 37% and 47%, respectively. The various flexible encoding profiles proposed add fine control to the image prediction dependencies, which allow to exploit the tradeoff between coding efficiency and the viewpoint random access, consequently, decreasing the maximum random access penalties that range from 0.60 to 0.15, for lenslet and HDCA light fields.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.image.2021.116202pt_PT
dc.identifier.issn0923-5965
dc.identifier.slugcv-prod-2482522
dc.identifier.urihttp://hdl.handle.net/10400.8/5522
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationPOCI-01-0145-FEDER028325pt_PT
dc.relationScalable Light Field Representation and Coding for Immersive Systems
dc.relationInstituto de Telecomunicações
dc.subjectLight field image codingpt_PT
dc.subjectViewpoint scalabilitypt_PT
dc.subjectViewpoint random accesspt_PT
dc.subjectHEVCpt_PT
dc.titleLight field image coding with flexible viewpoint scalability and random accesspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleScalable Light Field Representation and Coding for Immersive Systems
oaire.awardTitleInstituto de Telecomunicações
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F136953%2F2018/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50008%2F2020/PT
oaire.citation.startPage116202pt_PT
oaire.citation.titleSignal Processing: Image Communicationpt_PT
oaire.citation.volume94pt_PT
oaire.fundingStreamOE
oaire.fundingStream6817 - DCRRNI ID
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.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.cv.cienciaid6917-B121-4E34 | Nuno Miguel Morais Rodrigues
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationb4ebe652-7f0e-4e67-adb0-d5ea29fc9e69
relation.isAuthorOfPublication.latestForDiscoveryb4ebe652-7f0e-4e67-adb0-d5ea29fc9e69
relation.isProjectOfPublication2dd2e18b-2b7c-41d5-84d6-42e2a5ba7da0
relation.isProjectOfPublication0836c6a6-afd0-499e-8a16-612dd27ec1dc
relation.isProjectOfPublication.latestForDiscovery0836c6a6-afd0-499e-8a16-612dd27ec1dc

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