Recovering missing coefficients in DCT-transformed images

Li, Shujun; Karrenbauer, Andreas; Saupe, Dietmar; Kuo, C.-C. Jay

Recovering missing coefficients in DCT-transformed images

Dateien

Saupe etal.pdfGröße: 176.28 KBDownloads: 242

Datum

2011

Autor:innen

Li, Shujun

Karrenbauer, Andreas

Saupe, Dietmar

Kuo, C.-C. Jay

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Informatik und Informationswissenschaft
Zukunftskolleg

Publikationstyp

Beitrag zu einem Konferenzband

Publikationsstatus

Published

Erschienen in

Proceedings of 18th IEEE International Conference on Image Processing, 2011. IEEE, 2011, pp. 1537-1540. eISSN 1522-4880. ISBN 978-1-4577-1304-0. Available under: doi: 10.1109/ICIP.2011.6115738

Zusammenfassung

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.

Fachgebiet (DDC)

004 Informatik

Konferenz

18th IEEE International Conference on Image Processing (ICIP), 2011, 11. Sep. 2011 - 14. Sep. 2011, Brussels, Belgium

Zitieren

ISO 690

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. IEEE, 2011, pp. 1537-1540. eISSN 1522-4880. ISBN 978-1-4577-1304-0. Available under: doi: 10.1109/ICIP.2011.6115738

BibTex

@inproceedings{Li2011-09Recov-17262,
  year={2011},
  doi={10.1109/ICIP.2011.6115738},
  title={Recovering missing coefficients in DCT-transformed images},
  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}
}

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Kommentar zur Publikation

4 pages, 4 figures

Universitätsbibliographie

Ja