基于圆谐-傅里叶矩的数字水印算法

Digital Watermark Algorithm Based on Harmonic-Fourier Moment

针对几何攻击对数字水印的巨大破坏性,提出一种抗几何攻击水印算法,将水印信息隐藏于图像圆谐-傅里叶矩的幅度变化中。进行水印检测时只要比较受攻击图像的圆谐-傅里叶矩与密钥的差别,就能提取到水印序列。实验结果表明,该算法对旋转攻击、缩放、JPEG压缩和其他噪声攻击具有良好鲁棒性。

Aiming at the serious destructiveness of geometrical attack to digital watermark,this paper proposes a geometrical attack resisted watermark algorithm.This algorithm hides the watermark information among Harmonic-Fourier moment variation of the image.The watermark sequence can be extracted by comparing the Harmonic-Fourier moment of the attacked image with the key during the watermark detection.Experimental results show that the algorithm is robustness to rotation attacks,scaling,JPEG compression and other noise attacks.