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Proceedings Paper

Comparative assessment of semifragile watermarking techniques
Author(s): Oezguer Ekici; Baris Coskun; Umut Naci; Bulent Sankur
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Paper Abstract

Semi-fragile watermarking techniques aim to prevent tampering and fraudulent use of modified images. A semi-fragile watermark monitors the integrity of the content of the image but not its exact representation. Thus the watermark is designed so that if the content of the image has not been tampered with, and so long as the correct key is known and the image ha sufficiently high quality, the integrity is proven. However if some parts of the image is replaced by someone who does not possess the key, the watermark information will not be reliably detected, which can be taken as evidence of forgery. In this paper we compare the performance of nine semi-fragile watermarking algorithms in terms of their miss probability under forgery attack, and in terms of false alarm probability under mild, hence non-malicious signal processing operations that preserve the content and quality of the image. We propose desiderata for semi-fragile watermarking algorithms and indicate the promising algorithms among existing ones.

Paper Details

Date Published: 12 November 2001
PDF: 12 pages
Proc. SPIE 4518, Multimedia Systems and Applications IV, (12 November 2001); doi: 10.1117/12.448202
Show Author Affiliations
Oezguer Ekici, Bogazici Univ. (Turkey)
Baris Coskun, Bogazici Univ. (Turkey)
Umut Naci, Bogazici Univ. (Turkey)
Bulent Sankur, Bogazici Univ. (Turkey)

Published in SPIE Proceedings Vol. 4518:
Multimedia Systems and Applications IV
Andrew G. Tescher; Bhaskaran Vasudev; V. Michael Bove, Editor(s)

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