In this paper, we design a watermark algorithm to resist geometric attacks, which used LPT's characters to resist the scale, translation attack and used the exhaustive search method to oppose rotation attack.
In this paper, we design a watermark algorithm to resist geometric attacks, which used LPT's characters to resist the scale, translation attack and used the exhaustive search method to oppose rotation attack.
本文利用数极坐标变换的性质，消除平移和缩放对水印的威胁，用搜索的方法来应对旋转攻击，设计并实现了一种新的抗几何攻击的水印算法。