基于快速曲波变换的图像水印算法

提出了一种新的基于曲波变换的数字图像水印算法。首先,利用快速曲波变换对原始载体图像进行多分辨率分解,并对待嵌入的水印图像进行Arnold置乱;然后,根据人类视觉特征和曲波系数分布特点,将水印信息嵌入到原始图像的中高频系数中。实验结果表明,该算法具有好的不可见性和安全性,对噪声、裁剪、滤波、JPEG压缩等攻击有好的鲁棒性。

Image Watermarking Algorithm based on Fast Curvelet Transform

A digital image watermarking algorithm based on fast curvelet transform is proposed.Firstly,the carrier image is decomposed by fast curvelet transform,and then the watermarking image is scrambled by Arnold transform.Secondly,according to the human visual characters and curvelet coefficients the binary watermarking image is embedded into the medium frequency coefficients.Experiment results show that the proposed algorithm has good performance in both invisibility and security,and also of good robustness to the noise,cropping,filtering,JPEG compression and other attacks.