Title:
Edge directed resolution enhancement and demosaicing

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dc.contributor.advisor Altunbasak, Yucel
dc.contributor.author Pekkucuksen, Ibrahim Ethem en_US
dc.contributor.committeeMember AlRegib, Ghassan
dc.contributor.committeeMember Gunturk, Bahadir
dc.contributor.committeeMember Ma, Xiaoli
dc.contributor.committeeMember McClellan, James
dc.contributor.department Electrical and Computer Engineering en_US
dc.date.accessioned 2012-02-17T19:15:30Z
dc.date.available 2012-02-17T19:15:30Z
dc.date.issued 2011-08-19 en_US
dc.description.abstract The objective of the proposed research is to develop high performance, low computational complexity resolution enhancement and demosaicing algorithms. Our approach to both problems is to find creative ways to incorporate edge information into the algorithm design. However, in contrast with the usual edge directed approaches, we do not try to detect edge presence and orientation explicitly. For the image interpolation problem, we study the relationship between low resolution and high resolution pixels, and derive a general interpolation formula to be used on all pixels. This simple interpolation algorithm is able to generate sharp edges in any orientation. We also propose a simple 3 by 3 filter that quantifies local luminance transition and apply it to the demosaicing problem. Additionally, we propose a gradient based directional demosaicing method that does not require setting any thresholds. We show that the performance of this algorithm can be improved by using multiscale gradients. Finally, we address the low spectral correlation demosaicing problem by proposing a new family of hybrid color filter array (CFA) patterns and a local algorithm that is two orders of magnitude faster than a comparable non-local solution while offering the same level of performance. en_US
dc.description.degree PhD en_US
dc.identifier.uri http://hdl.handle.net/1853/42734
dc.publisher Georgia Institute of Technology en_US
dc.subject Demosaicing en_US
dc.subject Color filter array interpolation en_US
dc.subject CFA pattern design en_US
dc.subject Edge directed interpolation en_US
dc.subject Resolution enhancement en_US
dc.subject Image interpolation en_US
dc.subject.lcsh Resolution (Optics)
dc.subject.lcsh Image processing
dc.subject.lcsh Algorithms
dc.title Edge directed resolution enhancement and demosaicing en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.corporatename School of Electrical and Computer Engineering
local.contributor.corporatename College of Engineering
relation.isOrgUnitOfPublication 5b7adef2-447c-4270-b9fc-846bd76f80f2
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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