Refocusing distance of a standard plenoptic camera

2.50
Hdl Handle:
http://hdl.handle.net/10547/622845
Title:
Refocusing distance of a standard plenoptic camera
Authors:
Hahne, Christopher; Aggoun, Amar; Velisavljevic, Vladan; Fiebig, Susanne; Pesch, Matthias
Abstract:
Recent 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.
Affiliation:
University of Bedfordshire; ARRI Cine Technik
Citation:
C. Hahne, A. Aggoun, and V. Velisavljevic, S. Fiebig, and M. Pesch "Refocusing distance of a standard plenoptic camera," Opt. Express 24, Issue 19, 21521-21540 (2016).
Publisher:
Optics Society of America
Journal:
Optics Express
Issue Date:
19-Sep-2016
URI:
http://hdl.handle.net/10547/622845
Additional Links:
https://doi.org/10.1364/OE.24.021521
Type:
Article
Language:
en
Series/Report no.:
24; 19
Appears in Collections:
PhD e-theses

Full metadata record

DC FieldValue Language
dc.contributor.authorHahne, Christopheren
dc.contributor.authorAggoun, Amaren
dc.contributor.authorVelisavljevic, Vladanen
dc.contributor.authorFiebig, Susanneen
dc.contributor.authorPesch, Matthiasen
dc.date.accessioned2018-09-06T09:40:48Z-
dc.date.available2018-09-06T09:40:48Z-
dc.date.issued2016-09-19-
dc.identifier.citationC. Hahne, A. Aggoun, and V. Velisavljevic, S. Fiebig, and M. Pesch "Refocusing distance of a standard plenoptic camera," Opt. Express 24, Issue 19, 21521-21540 (2016).en
dc.identifier.urihttp://hdl.handle.net/10547/622845-
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.en
dc.language.isoenen
dc.publisherOptics Society of Americaen
dc.relation.ispartofseries24en
dc.relation.ispartofseries19en
dc.relation.urlhttps://doi.org/10.1364/OE.24.021521en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectlightfielden
dc.subjectrefocusingen
dc.subjectdistanceen
dc.subjectplenoptic cameraen
dc.titleRefocusing distance of a standard plenoptic cameraen
dc.typeArticleen
dc.contributor.departmentUniversity of Bedfordshireen
dc.contributor.departmentARRI Cine Techniken
dc.identifier.journalOptics Expressen
dc.type.qualificationnamePhDen_GB
dc.type.qualificationlevelPhDen
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