Share Email Print

Proceedings Paper

Robust image watermarking scheme resilient to desynchronization attacks
Author(s): Changryoul Choi; Jechang Jeong
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Desynchronization attacks have been a particularly serious threat to watermarking applications. Therefore, there has been a concerted effort to solve this problem. It was Martin Kutter who first proposed to use watermark itself as a tool for estimating the affine transform parameters by its periodicity, what is called the self-reference scheme. His brilliant idea has led to many variations. This scheme is resistant to general geometric transform attacks and the 'reference' is more difficult to destroy than templates. However, this scheme has some drawbacks such as relatively low capacity and high computational complexity, especially in calculating the autocorrelation function. In this paper, we propose a robust watermarking scheme particularly resilient to desynchronization attacks by embedding the watermark periodically. We solve these two problems of the self-reference scheme. For the problem of low channel capacity, we propose to use a finite field sequence to partition a given block and M-ary modulation. For the other problem of high computational complexity, we introduce bit-wise computations in calculating the autocorrelation function. Also, we separate the estimation of a translation factor and affine transform factors, respectively, which results in performance improvement.

Paper Details

Date Published: 29 April 2002
PDF: 11 pages
Proc. SPIE 4675, Security and Watermarking of Multimedia Contents IV, (29 April 2002); doi: 10.1117/12.465290
Show Author Affiliations
Changryoul Choi, Hanyang Univ. (South Korea)
Jechang Jeong, Hanyang Univ. (South Korea)

Published in SPIE Proceedings Vol. 4675:
Security and Watermarking of Multimedia Contents IV
Edward J. Delp; Ping Wah Wong, Editor(s)

© SPIE. Terms of Use
Back to Top