基于奇异值分解的DWT域多重数字水印算法

提出的基于矩阵奇异值分解的DWT域的数字水印算法利用Hadamard正交变换使多个水印编码互不干扰,利用奇异值分解有效地降低水印的嵌入量并有效提高水印嵌入的品质,使水印的稳健性和不可见性之间达到很好的平衡。实验结果表明,该算法实现的水印具有良好的不可见性,并对常见的图像处理和噪声干扰具有很好的稳健性。

An algorithm of multiple watermarking based on block singular value decomposition in wavelet domain

In this paper a multiple watermarking algorithm based on the singular value decomposition of matrix in DWT domain is presented.This algorithm enables multiple watermark encoding not interfere with each other by using Hadamard orthogonal transform,which can effectively reduce the watermark embedding capacity and improve the quality of watermark embedding by using the singular value decomposition of matrix.Thus the relation between robustness and imperceptibility can be well balanced.The experiment results show that this algorithm can give better image quality and better robust against noise and commonly used image processing techniques.