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dc.contributor.authorLiew, AWC
dc.contributor.authorYan, H
dc.contributor.authorLaw, NF
dc.date.accessioned2017-05-03T15:20:20Z
dc.date.available2017-05-03T15:20:20Z
dc.date.issued2005
dc.date.modified2009-03-26T06:42:35Z
dc.identifier.issn1051-8215
dc.identifier.doi10.1109/TCSVT.2005.848303
dc.identifier.urihttp://hdl.handle.net/10072/21802
dc.description.abstractIt is well known that low bit rate block-based discrete cosine transform coded image exhibits visually annoying coding artifacts. In this paper, we proposed a projection onto convex sets (PCOS)-based deblocking algorithm using a novel region smoothness constraint set for graphic images containing objects with smooth regions. The smoothness constraint set is obtained by an explicit modeling of smooth regions in the image using a spatially adaptive thin-plate spline. In contrast to most deblocking algorithms which enforce smoothness just around the 8 8 block boundaries, our algorithm enforces smoothness in regions which could possibly span several blocks. We showed that convergence of our algorithm could be reached within one iteration. The performance of the proposed algorithm is evaluated visually and quantitatively in term of peak signal-to-noise ratios and the mean squared difference of slope metric, which measures the impact of the blocking effects, for several graphic images. The results show that our algorithm can effectively suppress blockiness in smooth regions while still preserving the sharpness of object edges.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent766284 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoeng
dc.publisherInstitute of Electrical and Electronics Engineers
dc.publisher.placeUnited States
dc.publisher.urihttp://tcsvt.polito.it/
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom795
dc.relation.ispartofpageto800
dc.relation.ispartofissue6
dc.relation.ispartofjournalIEEE Transactions on Circuits and Systems for Video Technology
dc.relation.ispartofvolume15
dc.rights.retentionY
dc.subject.fieldofresearchArtificial Intelligence and Image Processing
dc.subject.fieldofresearchElectrical and Electronic Engineering
dc.subject.fieldofresearchcode0801
dc.subject.fieldofresearchcode0906
dc.titlePOCS-based Blocking Artifacts Suppression using a Smoothness Constraint Set with Explicit Region Modeling
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyright© 2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
gro.date.issued2005
gro.hasfulltextFull Text
gro.griffith.authorLiew, Alan Wee-Chung


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