Article: High-resolution lightfield photography using two masks

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Publisher Website: 10.1364/OE.20.010971
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Title	High-resolution lightfield photography using two masks
Authors	Xu, Z1 Ke, J1 Lam, EY1
Keywords	After-images Camera sensor Computational photography High resolution Imaging capabilities
Issue Date	2012
Publisher	Optical Society of America. The Journal's web site is located at http://www.opticsexpress.org
Citation	Optics Express, 2012, v. 20 n. 10, p. 10971-10983 [How to Cite?] DOI: http://dx.doi.org/10.1364/OE.20.010971
Abstract	A major theme of computational photography is the acquisition of lightfield, which opens up new imaging capabilities, such as focusing after image capture. However, to capture the lightfield, one normally has to sacrifice significant spatial resolution as compared to normal imaging for a fixed sensor size. In this work, we present a new design for lightfield acquisition, which allows for the capture of a higher resolution lightfield by using two attenuation masks. They are positioned at the aperture stop and the optical path respectively, so that the four-dimensional (4D) lightfield spectrum is encoded and sampled by a two-dimensional (2D) camera sensor in a single snapshot. Then, during post-processing, by exploiting the coherence embedded in a lightfield, we can retrieve the desired 4D lightfield with a higher resolution using inverse imaging. The performance of our proposed method is demonstrated with simulations based on actual lightfield datasets. © 2012 Optical Society of America.
ISSN	1094-4087 2011 Impact Factor: 3.587 2011 SCImago Journal Rankings: 1.956
DOI	http://dx.doi.org/10.1364/OE.20.010971
References	References in Scopus

DC Field	Value
dc.contributor.author	Xu, Z
dc.contributor.author	Ke, J
dc.contributor.author	Lam, EY
dc.date.accessioned	2012-08-08T08:35:12Z
dc.date.available	2012-08-08T08:35:12Z
dc.date.issued	2012
dc.description.abstract	A major theme of computational photography is the acquisition of lightfield, which opens up new imaging capabilities, such as focusing after image capture. However, to capture the lightfield, one normally has to sacrifice significant spatial resolution as compared to normal imaging for a fixed sensor size. In this work, we present a new design for lightfield acquisition, which allows for the capture of a higher resolution lightfield by using two attenuation masks. They are positioned at the aperture stop and the optical path respectively, so that the four-dimensional (4D) lightfield spectrum is encoded and sampled by a two-dimensional (2D) camera sensor in a single snapshot. Then, during post-processing, by exploiting the coherence embedded in a lightfield, we can retrieve the desired 4D lightfield with a higher resolution using inverse imaging. The performance of our proposed method is demonstrated with simulations based on actual lightfield datasets. © 2012 Optical Society of America.
dc.description.nature	published_or_final_version
dc.identifier.citation	Optics Express, 2012, v. 20 n. 10, p. 10971-10983 [How to Cite?] DOI: http://dx.doi.org/10.1364/OE.20.010971
dc.identifier.doi	http://dx.doi.org/10.1364/OE.20.010971
dc.identifier.epage	10983
dc.identifier.hkuros	200968
dc.identifier.issn	1094-4087 2011 Impact Factor: 3.587 2011 SCImago Journal Rankings: 1.956
dc.identifier.issue	10
dc.identifier.scopus	eid_2-s2.0-84861120126
dc.identifier.spage	10971
dc.identifier.uri	http://hdl.handle.net/10722/155759
dc.identifier.volume	20
dc.language	eng
dc.publisher	Optical Society of America. The Journal's web site is located at http://www.opticsexpress.org
dc.publisher.place	United States
dc.relation.ispartof	Optics Express
dc.relation.references	References in Scopus
dc.rights	This paper was published in [Optics Express] and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-20-10-10971]. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
dc.rights	Creative Commons: Attribution 3.0 Hong Kong License
dc.subject	After-images
dc.subject	Camera sensor
dc.subject	Computational photography
dc.subject	High resolution
dc.subject	Imaging capabilities
dc.title	High-resolution lightfield photography using two masks
dc.type	Article

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Author Affiliations

The University of Hong Kong