一种基于DWT与SVD的数字图像水印算法

利用小波变换和矩阵奇异值的固有特性,提出了一种基于小波变换和奇异值分解的数字图像水印算法.算法对原始载体图像进行小波变换和奇异值分解;对水印图像进行Arnold变换和奇异值分解;把分解后的水印信息嵌入到分解后的原始载体图像中,再进行相应的变换处理,得到嵌有水印的图像.实验结果表明,该算法具有良好的安全性和鲁棒性.

A Digital Image Watermarking Algorithm Based on DWT and SVD

Using the characteristics of discrete wavelet transform (DWT) and singular value decomposition(SVD), a digital image watermarking algorithm based on DWT and SVD is proposed. The original image is transformed by DWT and SVD and the watermarking image is processed by Arnold transform and SVD. The watermarking image processed is embedded the original image decomposed. Then the image embedded by watermarking is gained through the corresponding transform. Experimental results show that the watermarking algorithm performs well in security and robustness.