一种基于混沌变换和小波变换的零水印算法

A New Zero-watermark Algorithm Based on Chaotic Sequences and Wavelet Transform

根据零水印的概念,提出了一种基于混沌变换和小波变换相结合的水印生成算法。该方法不对原始图像作任何修改,在对原始水印混沌加密以后,利用小波变换低频系数特征实现水印的嵌入。试验证明,该方法解决了水印不可见性和鲁棒性之间的矛盾,具有很强的抗攻击能力。

According to the conception of zero - watermarking, this paper proposed a zero - watermarking algorithm based on chaotic sequences and wavelet transform. The method realized embedding watermark by obtaining the extracted watermark image through the encrypted watermark and low - frequency sub - image after wavelet transform. Experimental result shows that the method is more robustness and improves transparency and security.