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Journal of Electrical and Computer EngineeringVolume 2010 2010, Article ID 348321, 6 pages

Research Article

College of Liberal Arts, Kwangwoon University, 447-1, Welgye-1Dong, Nowon-Gu, Seoul 139-701, South Korea

Deptartment of Information and Communications Engineering, Anyang 5-Dong, Manan-Gu, Anyang, Gyeonggi-do, 430-714, South Korea

Department of Electronic Engeering, Kwangwoon University, 447-1, Welgye-1Dong, Nowon-Gu, Seoul 139-701, South Korea

Department of Electronic Materials Engeering, Kwangwoon University, 447-1, Welgye-1Dong, Nowon-Gu, Seoul 139-701, South Korea

Received 19 October 2009; Revised 8 February 2010; Accepted 13 February 2010

Academic Editor: Liang-Gee Chen

Copyright © 2010 Young-Ho Seo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We propose a watermark embedding and extracting method for blind watermarking. It uses the characteristics of a scalar quantizer to comply with the recommendation in JPEG, MPEG series, or JPEG2000. Our method performs embedding of a watermark bit by shifting the corresponding frequency transform coefficient the watermark position to a quantization index according to the value of the watermark bit, which prevents from losing the watermark information during the data compression process. The watermark can be embedded simultaneously to the quantization process without an additional process for watermarking, which means it can be performed at the same speed to the compression process. In the embedding process, a Linear Feedback Shift Register LFSR is used to hide the watermark informations and the watermark positions. The experimental results showed that the proposed method satisfies enough robustness and imperceptibility that are the major requirements for watermarking.





Autor: Young-Ho Seo, Hyun-Jun Choi, Ji-Sang Yoo, and Dong-Wook Kim

Fuente: https://www.hindawi.com/



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