Enhancement of Decompressed Images at Low Bit Rates

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dc.citation.bibtexNameinproceedingsen_US
dc.citation.conferenceNameSPIE, Mathematical Imaging: Wavelet Applications in Signal Processing and Image Processing IIen_US
dc.contributor.authorGopinath, Ramesh A.en_US
dc.contributor.authorLang, Markusen_US
dc.contributor.authorGuo, Haitaoen_US
dc.contributor.authorOdegard, Jan E.en_US
dc.contributor.orgDigital Signal Processing (http://dsp.rice.edu/)en_US
dc.date.accessioned2007-10-31T00:45:07Z
dc.date.available2007-10-31T00:45:07Z
dc.date.issued1994-07-20en
dc.date.modified2004-01-22en_US
dc.date.note2004-01-09en_US
dc.date.submitted1994-07-20en_US
dc.descriptionConference Paperen_US
dc.description.abstractTransform coding at low bit rates introduces artifacts associated with the basis functions of the transform. For example, decompressed images based on the DCT (discrete cosine transform)- like JPEG<sup>16</sup> - exhibit blocking artifacts at low bit rates. This paper proposes a post-processing scheme to enhance decompressed images that is potentially applicable in several situations. In particular, the method works remarkable well in "deblocking" of DCT compressed images. The method is non-linear, computationally efficient, and spatially adaptive - and has the distint feature that it removes artifacts while yet retaining sharp features in the images. An important implication of this result is that images coded using the JPEG standard can be efficiently post-processed to give significantly improved visual quality in the images.en_US
dc.identifier.citationR. A. Gopinath, M. Lang, H. Guo and J. E. Odegard, "Enhancement of Decompressed Images at Low Bit Rates," 1994.
dc.identifier.doihttp://dx.doi.org/10.1117/12.188786en_US
dc.identifier.urihttps://hdl.handle.net/1911/19909
dc.language.isoeng
dc.subjectimage enhancement*
dc.subjectwavelet shrinkage*
dc.subjectjpeg*
dc.subjectimage restoration*
dc.subjectimage compression*
dc.subject.keywordimage enhancementen_US
dc.subject.keywordwavelet shrinkageen_US
dc.subject.keywordjpegen_US
dc.subject.keywordimage restorationen_US
dc.subject.keywordimage compressionen_US
dc.subject.otherWavelet based Signal/Image Processingen_US
dc.titleEnhancement of Decompressed Images at Low Bit Ratesen_US
dc.typeConference paper
dc.type.dcmiText
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