Reversible transformations may improve the quality of reversible watermarking

Ajith M. Kamath

doi:10.1117/12.845993

27 January 2010 Reversible transformations may improve the quality of reversible watermarking

Ajith M. Kamath

Proceedings Volume 7541, Media Forensics and Security II; 75410C (2010) https://doi.org/10.1117/12.845993
Event: IS&T/SPIE Electronic Imaging, 2010, San Jose, California, United States

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.

Citation Download Citation

Ajith M. Kamath "Reversible transformations may improve the quality of reversible watermarking", Proc. SPIE 7541, Media Forensics and Security II, 75410C (27 January 2010); https://doi.org/10.1117/12.845993

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