Recovering missing coefficients in DCT-transformed images

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LI, Shujun, Andreas KARRENBAUER, Dietmar SAUPE, C.-C. Jay KUO, 2011. Recovering missing coefficients in DCT-transformed images. 18th IEEE International Conference on Image Processing (ICIP), 2011. Brussels, Belgium, 11. Sep 2011 - 14. Sep 2011. In: Proceedings of 18th IEEE International Conference on Image Processing, 2011. 18th IEEE International Conference on Image Processing (ICIP), 2011. Brussels, Belgium, 11. Sep 2011 - 14. Sep 2011. IEEE, pp. 1537-1540. eISSN 1522-4880. ISBN 978-1-4577-1304-0

@inproceedings{Li2011-09Recov-17262, title={Recovering missing coefficients in DCT-transformed images}, year={2011}, doi={10.1109/ICIP.2011.6115738}, isbn={978-1-4577-1304-0}, isbn={978-1-4577-1304-0}, publisher={IEEE}, booktitle={Proceedings of 18th IEEE International Conference on Image Processing, 2011}, pages={1537--1540}, author={Li, Shujun and Karrenbauer, Andreas and Saupe, Dietmar and Kuo, C.-C. Jay}, note={4 pages, 4 figures} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/17262"> <dcterms:bibliographicCitation>Paper presented at: 18th IEEE International Conference on Image Processing (ICIP 2011), 11.-14. September, 2011, Brussels, Belgium</dcterms:bibliographicCitation> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-12-01T12:34:26Z</dc:date> <dc:creator>Saupe, Dietmar</dc:creator> <dc:rights>deposit-license</dc:rights> <dcterms:abstract xml:lang="eng">A general method for recovering missing DCT coefficients in DCT-transformed images is presented in this work. We model the DCT coefficients recovery problem as an optimization problem and recover all missing DCT coefficients via linear programming. The visual quality of the recovered image gradually decreases as the number of missing DCT coefficients increases. For some images, the quality is surprisingly good even when more than 10 most significant DCT coefficients are missing. When only the DC coefficient is missing, the proposed algorithm outperforms existing methods according to experimental results conducted on 200 test images. The proposed recovery method can be used for cryptanalysis of DCT based selective encryption schemes and other applications.</dcterms:abstract> <dc:language>eng</dc:language> <dc:contributor>Karrenbauer, Andreas</dc:contributor> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-12-01T12:34:26Z</dcterms:available> <dc:contributor>Saupe, Dietmar</dc:contributor> <dc:contributor>Kuo, C.-C. Jay</dc:contributor> <dc:creator>Li, Shujun</dc:creator> <dc:creator>Karrenbauer, Andreas</dc:creator> <dcterms:rights rdf:resource="http://nbn-resolving.org/urn:nbn:de:bsz:352-20140905103605204-4002607-1"/> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/17262"/> <dc:creator>Kuo, C.-C. Jay</dc:creator> <dc:contributor>Li, Shujun</dc:contributor> <dcterms:issued>2011-09</dcterms:issued> <dcterms:title>Recovering missing coefficients in DCT-transformed images</dcterms:title> </rdf:Description> </rdf:RDF>

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