基于DWT和BEMD的图像水印嵌入算法

Image Watermark Embedding Algorithm Based on DWT and BEMD

信息隐藏是信息安全的一个新的重要内容,数字水印技术是信息隐藏技术研究领域的重要分支。鲁棒性和隐藏性是数字水印技术的关键。本文提出了一种基于离散小波变换和二维经验模式分解的图像数字水印算法,在嵌入水印前把水印进行Arnold变换,把水印信息置乱,消除像素的空间相关性,从而提高了水印信息的安全性和鲁棒性。实验结果表明,该水印算法具有很强的不可见性和抗几何处理的鲁棒性,算法简单且易于实现,具有很高的实用价值。

Hiding Information technology is a new important part of information security. And Digital watermarking technology is an important branch in the field of information hiding technology. Robustness and hiding are the key technologies of digital watermarking technology. We proposes an image digital watermark algorithm which combines Discrete Wavelet Transform（DWT） and Bi-dimensional Empirical Mode Decomposition（BEMD）. The security and the robustness of watermarking were improved by Arnold transform which scrambles watermarking information and eliminates pixel＇ s space relativity. The experimental results show that the watermarking algorithm has strong hiding and robustness for anti-attack. The proposed technique is really practical in the real world, and easy to realize.