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Proceedings Paper

Reversible transformations may improve the quality of reversible watermarking
Author(s): Ajith M. Kamath
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Paper Abstract

We investigate the use of reversible pre-embedding transformations to enhance reversible watermarking schemes for images. We are motivated by the observation that a (non-reversible) sorting transformation dramatically increases the quality of the embedding when combined with a reversible watermark based on a generalized integer transform. In one example we obtain a PSNR gain of 23 dB using the pre-sorting approach over the regular embedding method for the same payload size. This may provide opportunities for increasing the embedding capacity by trading off the quality for a larger payload size. We test several reversible sorting approaches but these do not provide us any gain in the watermarking capacity or quality.

Paper Details

Date Published: 27 January 2010
PDF: 11 pages
Proc. SPIE 7541, Media Forensics and Security II, 75410C (27 January 2010); doi: 10.1117/12.845993
Show Author Affiliations
Ajith M. Kamath, Digimarc Corp. (United States)

Published in SPIE Proceedings Vol. 7541:
Media Forensics and Security II
Nasir D. Memon; Jana Dittmann; Adnan M. Alattar; Edward J. Delp, Editor(s)

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