Robust digital image watermarking based on subsampling

被引：52
作者：
Lu, Wei [1 ]
Lu, Hongtao
Chung, Fu-Lai
机构：
[1] Shanghai Jiao Tong Univ, Dept Comp Sci & Engn, Shanghai 200030, Peoples R China
[2] Hong Kong Polytech Univ, Dept Comp, Kowloon, Hong Kong, Peoples R China
来源：
APPLIED MATHEMATICS AND COMPUTATION | 2006年 / 181卷 / 02期
基金：
中国国家自然科学基金;
关键词：
copyright protection; image watermarking; subsampling; chaotic map;
D O I：
10.1016/j.amc.2006.02.012
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
This paper presents a robust digital watermarking scheme for copyright protection of digital images. Four subimages are obtained from the host image by using subsampling. A binary watermark image is permutated using chaotic map and then is embedded into the DCT coefficients of two of the subimages which are selected according to a random coordinates sequence generated by a secret key. Watermark extraction is simply by comparing the DCT coefficients of the watermarked subimages and does not need original image. Experimental results show good robustness and security of the proposed scheme. (c) 2006 Elsevier Inc. All rights reserved.
引用
收藏
页码：886 / 893
页数：8
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