一种基于DWT和SVD的双重水印算法

An Algorithm of Double-Level Watermarking Based on DWT and SVD

提出了一种基于离散小波变换(DWT)和奇异值分解(SVD)的双重水印算法,其所嵌入的水印是由两幅不同的水印图像组成,将其中的一幅水印图像嵌入到另一幅水印中得到双重水印图像,对双重水印图像进行Arnold变换,然后再将其嵌入到宿主图像中.当数字产品遭到恶意破解后,水印中仍然有一层水印信息,可以更好地维护版权信息.实验结果证明了该方法对于JPEG压缩、噪声、旋转、剪切等具有很好的鲁棒性.

An algorithm of double-level watermarking based on DWT and SVD is proposed in this paper. The embedded watermarking image constits of two different images. Firstly, one image is embedded into another, then Arnold transform is performed on the mixed image, which is later embedded into the host image. If the mixed watermarking information is got viciously, a level of deep-seated watermarking still remains to protect the copyright better. Experimental results a level of demonstrate that the proposed approach is robust against common signal processing such as JPEG compression, noise, rotation and cropping.