基于嵌入模版的抗几何攻击的数字水印改进算法

An improved digital watermarking Algorithm based on Embedded template against geometric-attacks

提出一种改进的基于嵌入模板的抗几何攻击的数字水印算法。算法中的嵌入模板既可以标识变换的参数,也可以标识移动的坐标,以便于评估几何失真程度和提高水印恢复的效率。本算法在水印的鲁棒性和不可察觉性之间寻找一个平衡点,并在水印检测时实现盲检测。实验结果表明,该算法可以从全局和局部或非线性几何攻击中恢复失真,是实用和有效的。

A new algorithm improving watermarking robustness based on embedded template is proposed in this paper. The embedding template in algorithm allows identifying both the transformation parameters and translation coordinates, so that can estimate distortions and maximize watermark recovery effectiveness. The algorithm has found a good balance between the robustness and imperceptible of the algorithm, and realized the blind detectioh. Experiment results show that this algorithm can restore distortion caused by global and local or no- linear geometrical attack, and it is practical and effective.