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Article: Digital restoration of defocused images in the wavelet domain

TitleDigital restoration of defocused images in the wavelet domain
Authors
Issue Date2002
PublisherOptical Society of America. The Journal's web site is located at http://ao.osa.org/journal/ao/about.cfm
Citation
Applied Optics, 2002, v. 41 n. 23, p. 4806-4811 How to Cite?
AbstractMany cameras nowadays are equipped with an autofocus mechanism that attempts to take pictures at the best possible focus. However, there are situations in which the pictures are still out of focus, such as when the photographer has mistakenly focused at a wrong position or when the focusing region consists of objects of different depths and therefore confuses the autofocus system. With a digital camera, we can attempt to use digital image-restoration techniques to bring the pictures back into focus. We design an algorithm that restores the image by digitally enhancing the corresponding frequency bands. We employ the restoration in the wavelet domain so that this restoration scheme can be compliant with JPEG 2000, which is positioned to succeed JPEG as the next image-compression standard and has the potential to be widely adopted by the digital photography industry owing to its many advanced features. © 2002 Optical Society of America.
Persistent Identifierhttp://hdl.handle.net/10722/73543
ISSN
2010 Impact Factor: 1.707
References

 

DC FieldValueLanguage
dc.contributor.authorLam, EYen_HK
dc.date.accessioned2010-09-06T06:52:21Z-
dc.date.available2010-09-06T06:52:21Z-
dc.date.issued2002en_HK
dc.identifier.citationApplied Optics, 2002, v. 41 n. 23, p. 4806-4811en_HK
dc.identifier.issn0003-6935en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73543-
dc.description.abstractMany cameras nowadays are equipped with an autofocus mechanism that attempts to take pictures at the best possible focus. However, there are situations in which the pictures are still out of focus, such as when the photographer has mistakenly focused at a wrong position or when the focusing region consists of objects of different depths and therefore confuses the autofocus system. With a digital camera, we can attempt to use digital image-restoration techniques to bring the pictures back into focus. We design an algorithm that restores the image by digitally enhancing the corresponding frequency bands. We employ the restoration in the wavelet domain so that this restoration scheme can be compliant with JPEG 2000, which is positioned to succeed JPEG as the next image-compression standard and has the potential to be widely adopted by the digital photography industry owing to its many advanced features. © 2002 Optical Society of America.en_HK
dc.languageengen_HK
dc.publisherOptical Society of America. The Journal's web site is located at http://ao.osa.org/journal/ao/about.cfmen_HK
dc.relation.ispartofApplied Opticsen_HK
dc.rightsApplied Optics. Copyright © Optical Society of America.en_HK
dc.titleDigital restoration of defocused images in the wavelet domainen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0003-6935&volume=41&spage=4806&epage=4811&date=2002&atitle=Digital+Restoration+Of+Defocused+Images+In+The+Wavelet+Domainen_HK
dc.identifier.emailLam, EY:elam@eee.hku.hken_HK
dc.identifier.authorityLam, EY=rp00131en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0037055691en_HK
dc.identifier.hkuros81390en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037055691&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume41en_HK
dc.identifier.issue23en_HK
dc.identifier.spage4806en_HK
dc.identifier.epage4811en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLam, EY=7102890004en_HK

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