基于二值化图像构造的零水印版权保护方案*

利用零水印概念提出一种公钥体制的图像内容版权保护方案。该方案不对原始图像数据作任何修改，使得传统意义水印的稳健性、安全性和不可感知性之间的矛盾用一种特殊的方法得到了解决。水印实现完全依赖于对图像重要特征的构造方法。选择原始图像的二值化比特图作为重要特征，利用逻辑运算变换与加密实现版权标志的存在。其算法简单、隐藏信息量大、安全性好。实验结果证明：其稳健性非常优越，完全能实现版权保护功能。

New zero watermark copyright protection scheme based on binary bitmap

This paper proposed a new image copyright protection public key scheme based on zero watermarking concept. Due to not modifying any digital data in original image, resolved the traditional problem between robust and imperceptivity or security. Watermark was constructed based on important image feature. Selected the bitmap of original map as important feature and proposed a new public key image copyright protection scheme based zero watermark. The algorithm is simple and provided high hiding capacity as well as good security. Experimental results show that the method is more robustness than many classical watermarking embedding techniques and can be used for copyright protection.