一种抗裁剪和旋转的盲水印嵌入新方法

A Novel Embedding Game of Blind Watermarking Against Rotation and Shearing

在满足提取水印完整性的前提下,提出了一种可抗相应角度裁剪和旋转攻击的水印嵌入新方法,它以掩饰图像中心为对称点,将图像按一定角度要求划分成均等的若干块,其中每一块均可通过给定角度倍数的旋转与参考块重合。通过对水印的裁剪和旋转攻击方法的分析,给出将对称思想与多次嵌入方法相结合的解决方案,分析并证明了它对如上的角度裁剪和旋转攻击具有鲁棒性。具体介绍了实现水印时的嵌入策略,并讨论了嵌入量和鲁棒性之间的关系。本文提出的新方法,其特点是不依赖于工作域的选择,同时也与具体水印嵌入算法无关。试验结果表明它对于抵抗相应攻击具有有效性。

By studying the watermarking attacking, we propose a novel embedding game for the blind watermarking. This game is based on the extraction of the whole watermarking as follows: the cover image is split into many shares with respect to its center, each share of which can be exactly overlapped the comparable one by the some rotations. This game is robust to rotating and shearing. The game that integrates the symmetric game and the multi-embedding is given. The robustness to rotating and shearing of angles is also proved. Moreover, we present a method to realize the game and discuss the relationship between the robustness and the payload in the scheme. The method is independent of the transformation domain and the embedding algorithm. Our test results show that the game is valid.