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dc.contributor.authorHahne, Christopher
dc.contributor.authorAggoun, Amar
dc.contributor.authorVelisavljevic, Vladan
dc.contributor.authorFiebig, Susanne
dc.contributor.authorPesch, Matthias
dc.date.accessioned2017-03-09T15:40:53Z
dc.date.available2017-03-09T15:40:53Z
dc.date.issued2016-09-08
dc.identifier.citationHahne, C., Aggoun, A., Velisavljevic, V., Fiebig, S., and Pesch, M. (2016) 'Refocusing distance of a standard plenoptic camera', Optics Express, 24 (19)
dc.identifier.issn1094-4087
dc.identifier.doi10.1364/OE.24.021521
dc.identifier.urihttp://hdl.handle.net/2436/620414
dc.description.abstractRecent developments in computational photography enabled variation of the optical focus of a plenoptic camera after image exposure, also known as refocusing. Existing ray models in the field simplify the camera’s complexity for the purpose of image and depth map enhancement, but fail to satisfyingly predict the distance to which a photograph is refocused. By treating a pair of light rays as a system of linear functions, it will be shown in this paper that its solution yields an intersection indicating the distance to a refocused object plane. Experimental work is conducted with different lenses and focus settings while comparing distance estimates with a stack of refocused photographs for which a blur metric has been devised. Quantitative assessments over a 24 m distance range suggest that predictions deviate by less than 0.35 % in comparison to an optical design software. The proposed refocusing estimator assists in predicting object distances just as in the prototyping stage of plenoptic cameras and will be an essential feature in applications demanding high precision in synthetic focus or where depth map recovery is done by analyzing a stack of refocused photographs.
dc.language.isoen
dc.publisherThe Optical Society (OSA)
dc.relation.urlhttps://www.osapublishing.org/abstract.cfm?URI=oe-24-19-21521
dc.subjectLens system design
dc.subjectPhotography
dc.subjectImage reconstruction techniques
dc.subjectComputational imaging
dc.titleRefocusing distance of a standard plenoptic camera
dc.typeJournal article
dc.identifier.journalOptics Express
dc.date.accepted2016-05-31
rioxxterms.funderUniversity of Wolverhampton
rioxxterms.identifier.projectUoW090317AA
rioxxterms.versionAM
rioxxterms.licenseref.urihttps://creativecommons.org/CC BY-NC-ND 4.0
rioxxterms.licenseref.startdate2018-03-01
dc.source.volume24
dc.source.issue19
dc.source.beginpage21521
dc.source.endpage21540
refterms.dateFCD2018-10-19T08:34:27Z
refterms.versionFCDAM
refterms.dateFOA2018-03-01T00:00:00Z
html.description.abstractRecent developments in computational photography enabled variation of the optical focus of a plenoptic camera after image exposure, also known as refocusing. Existing ray models in the field simplify the camera’s complexity for the purpose of image and depth map enhancement, but fail to satisfyingly predict the distance to which a photograph is refocused. By treating a pair of light rays as a system of linear functions, it will be shown in this paper that its solution yields an intersection indicating the distance to a refocused object plane. Experimental work is conducted with different lenses and focus settings while comparing distance estimates with a stack of refocused photographs for which a blur metric has been devised. Quantitative assessments over a 24 m distance range suggest that predictions deviate by less than 0.35 % in comparison to an optical design software. The proposed refocusing estimator assists in predicting object distances just as in the prototyping stage of plenoptic cameras and will be an essential feature in applications demanding high precision in synthetic focus or where depth map recovery is done by analyzing a stack of refocused photographs.


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