File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Discrete cosine transform domain restoration of defocused images

TitleDiscrete cosine transform domain restoration of defocused images
Authors
Issue Date1998
PublisherOptical Society of America. The Journal's web site is located at http://ao.osa.org/journal/ao/about.cfm
Citation
Applied Optics, 1998, v. 37 n. 26, p. 6213-6218 How to Cite?
AbstractIn discrete-cosine-transform-based (DCT-based) compressions such as JPEG it is a common practice to use the same quantization matrix for both encoding and decoding. However, this need not be the case, and the flexibility of designing different matrices for encoding and decoding allows us to perform image restoration in the DCT domain. This is especially useful when we have severe limitations on the computational power, for instance, with in-camera image manipulation for programmable digital cameras. We provide an algorithm that compensates partially for a defocus error in image acquisition, and experimental results show that the restored image is closer to the in-focus image than is the defocused image. © 1998 Optical Society of America.
Persistent Identifierhttp://hdl.handle.net/10722/154768
ISSN
2010 Impact Factor: 1.707
References

 

DC FieldValueLanguage
dc.contributor.authorLam, EYen_US
dc.contributor.authorGoodman, JWen_US
dc.date.accessioned2012-08-08T08:30:34Z-
dc.date.available2012-08-08T08:30:34Z-
dc.date.issued1998en_US
dc.identifier.citationApplied Optics, 1998, v. 37 n. 26, p. 6213-6218en_US
dc.identifier.issn0003-6935en_US
dc.identifier.urihttp://hdl.handle.net/10722/154768-
dc.description.abstractIn discrete-cosine-transform-based (DCT-based) compressions such as JPEG it is a common practice to use the same quantization matrix for both encoding and decoding. However, this need not be the case, and the flexibility of designing different matrices for encoding and decoding allows us to perform image restoration in the DCT domain. This is especially useful when we have severe limitations on the computational power, for instance, with in-camera image manipulation for programmable digital cameras. We provide an algorithm that compensates partially for a defocus error in image acquisition, and experimental results show that the restored image is closer to the in-focus image than is the defocused image. © 1998 Optical Society of America.en_US
dc.languageengen_US
dc.publisherOptical Society of America. The Journal's web site is located at http://ao.osa.org/journal/ao/about.cfmen_US
dc.relation.ispartofApplied Opticsen_US
dc.titleDiscrete cosine transform domain restoration of defocused imagesen_US
dc.typeArticleen_US
dc.identifier.emailLam, EY:elam@eee.hku.hken_US
dc.identifier.authorityLam, EY=rp00131en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0001541823en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0001541823&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume37en_US
dc.identifier.issue26en_US
dc.identifier.spage6213en_US
dc.identifier.epage6218en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridLam, EY=7102890004en_US
dc.identifier.scopusauthoridGoodman, JW=7402288924en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats