计算机工程 ›› 2010, Vol. 36 ›› Issue (2): 132-134.doi: 10.3969/j.issn.1000-3428.2010.02.047

• 安全技术 • 上一篇    下一篇

基于BTC与秘密共享的图像水印算法

姜明芳1,2,朱宁波1   

  1. (1. 湖南大学计算机与通信学院,长沙410082;2. 湖南第一师范学院图书馆,长沙 410205)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-01-20 发布日期:2010-01-20

Image Watermark Algorithm Based on BTC and Secret Sharing

JIANG Ming-fang1,2, ZHU Ning-bo1   

  1. (1. School of Computer and Communication, Hunan University, Changsha 410082;2. Library of Hunan First Normal University, Changsha 410205)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-01-20 Published:2010-01-20

摘要: 结合块截短编码与秘密共享,提出一种新的鲁棒图像水印算法。该算法利用BTC编码由原图像构建特征共享,利用水印图像与特征共享一起生成私有共享。由待验证图像构建的特征共享与私有共享一起恢复水印图像。私有共享的生成与特征共享有关,可实现对同一图像的多水印注册。特征共享的稳健性确保了算法的水印鲁棒性,水印嵌入没有引起图像质量的改变。实验结果表明该算法对一般信号处理攻击有较高的鲁棒性。

关键词: 图像水印技术, 块截短编码, 秘密共享

Abstract: A novel robust image watermark technology is presented by combining Block Truncation Coding(BTC) and secret sharing. The feature share of the original image constructed by BTC is combined with the watermark to generate the private share. In watermark extraction, the watermark can be retrieved by XOR operation between the private share and the feature share from the suspected image. The private share is dependent of the feature share, and it is possible to register multiple watermarks for a single host image, and the robustness of the feature share ensures the robustness of the watermark algorithm. This algorithm does not alter the host image when the private share is generated. Experimental results show high robustness of the proposed algorithm against common signal processing attacks.

Key words: image watermark technology, Block Truncation Coding(BTC), secret sharing

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