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Odstraňování artefaktů JPEG komprese obrazových dat / Removal of JPEG compression artefacts in image data

This thesis is concerned with the removal of artefacts typical for JPEG im- age compression. First, we describe the mathematical formulation of the JPEG format and the problem of artefact removal. We then formulate the problem as an optimization problem, where the minimized functional is obtained via Bayes' theorem and complex wavelets. We describe proximal operators and algorithms and apply them to the minimization of the given functional. The final algorithm is implemented in MATLAB and tested on several test problems. 1

Identiferoai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:341236
Date January 2014
CreatorsLopata, Jan
ContributorsKučera, Václav, Šroubek, Filip
Source SetsCzech ETDs
LanguageCzech
Detected LanguageEnglish
Typeinfo:eu-repo/semantics/masterThesis
Rightsinfo:eu-repo/semantics/restrictedAccess

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