本文提出了一种使用直方图不变矩抗几何攻击零水印算法。该方法首先对图像直方图进行分析,然后计算该图像的直方图不变矩，最后使用直方图不变矩来构建水印系统。水印提取过程简单,只需计算所得图像的几个直方图不变量。文中给出了实验结果,并与基于几何矩不变量的算法进行了比较。经过仿真实验证明，该方法对于旋转、缩放等攻击具有很好鲁棒性的同时，对于普通的滤波、JPEG压缩攻击也具有很好的鲁棒性，且具有极低误检率。

This paper proposes a zero digital watermarking image algorithm using histogram invariant moments to resist geometric attacks .The construction of the watermark system for the original image is achieved by analyzing the histogram and computing the histogram invariant moments.Watermark extraction is simple,and only a few histogram invariant moments need to be calculated.The experimental results are compared with the results of the method based on the geometric moments.The simulation experiments demonstrate the proposed method is robust to rotation,scaling geometric attacks as well as to filtering,JPEG compression .so the proposed method is a simple,useful and credible algorithm.