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dc.contributor.authorJavidnia, Hossein
dc.contributor.authorCorcoran, Peter
dc.date.accessioned2018-10-08T13:06:53Z
dc.date.available2018-10-08T13:06:53Z
dc.date.issued2018-04-06
dc.identifier.citationJavidnia, Hossein, & Corcoran, Peter (2018). Application of preconditioned alternating direction method of multipliers in depth from focal stack. Journal of Electronic Imaging, 27(2), 17. doi: 10.1117/1.JEI.27.2.023019en_IE
dc.identifier.issn1560-229X
dc.identifier.urihttp://hdl.handle.net/10379/14582
dc.description.abstractPostcapture refocusing effect in smartphone cameras is achievable using focal stacks. However, the accuracy of this effect is totally dependent on the combination of the depth layers in the stack. The accuracy of the extended depth of field effect in this application can be improved significantly by computing an accurate depth map, which has been an open issue for decades. To tackle this issue, a framework is proposed based on a preconditioned alternating direction method of multipliers for depth from the focal stack and synthetic defocus application. In addition to its ability to provide high structural accuracy, the optimization function of the proposed framework can, in fact, converge faster and better than state-of-the-art methods. The qualitative evaluation has been done on 21 sets of focal stacks and the optimization function has been compared against five other methods. Later, 10 light field image sets have been transformed into focal stacks for quantitative evaluation purposes. Preliminary results indicate that the proposed framework has a better performance in terms of structural accuracy and optimization in comparison to the current state-of-the-art methods. (C) 2018 SPIE and IS&Ten_IE
dc.description.sponsorshipThe research work presented here was funded under the Strategic Partnership Program of Science Foundation Ireland (SFI) and cofunded by SFI and FotoNation Ltd. Project ID: 13/SPP/I2868 on “Next Generation Imaging for Smartphone and Embedded Platforms.”en_IE
dc.formatapplication/pdfen_IE
dc.language.isoenen_IE
dc.publisherSociety of Photo-optical Instrumentation Engineers (SPIE)en_IE
dc.relation.ispartofJournal Of Electronic Imagingen
dc.subjectFocal stacken_IE
dc.subjectDepthen_IE
dc.subjectRegularizationen_IE
dc.subjectSynthetic defocusen_IE
dc.subjectSPLITTING METHODen_IE
dc.subjectFOCUSen_IE
dc.subjectALGORITHMSen_IE
dc.subjectRECONSTRUCTIONen_IE
dc.subjectSELECTIONen_IE
dc.subjectRECOVERYen_IE
dc.subjectDEFOCUSen_IE
dc.titleApplication of preconditioned alternating direction method of multipliers in depth from focal stacken_IE
dc.typeArticleen_IE
dc.date.updated2018-09-27T13:35:47Z
dc.identifier.doi10.1117/1.JEI.27.2.023019
dc.local.publishedsourcehttps://doi.org/10.1117/1.JEI.27.2.023019en_IE
dc.description.peer-reviewedpeer-reviewed
dc.contributor.funderScience Foundation Irelanden_IE
dc.contributor.funderFotoNation Ltden_IE
dc.internal.rssid14663567
dc.local.contactPeter Corcoran, Electrical & Electronic Eng, Room 3041, Engineering Building, Nui Galway. 2764 Email: peter.corcoran@nuigalway.ie
dc.local.copyrightcheckedYes
dc.local.versionSUBMITTED
dcterms.projectinfo:eu-repo/grantAgreement/SFI/SFI Strategic Partnership Programme/13/SPP/I2868/IE/Next Generation Imaging for Smartphone and Embedded Platforms/en_IE
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