【摘要】 数字水印技术被视为数字产品版权保护的一种新方法。利用奇异值分解(singularvaluedecomposition,SVD)的良好性能以及双密钥调制的特点,提出了一个新的基于SVD的数字图像水印算法。首先将图像进行分块,然后通过各个图像子块的SVD变换获得奇异值,将各子块的奇异值组成向量后再采用双密钥调制方式嵌入水印。水印的提取不需要原始图像。实验结果表明该算法具有良好的鲁棒性和不可见性。更多还原

【Abstract】 Digital watermarking is deemed as a novel technique for copyright protection of digital product and has aroused extensive in-terests in recent years. A new digital image watermarking algorithm based on block singular value decomposition (SVD) is proposedby incorporating SVD and two-key modulation. The singular values of each image sub-block is gained to form a vector by applying theSVD procedure. Then a watermark is embedded by modulating the vectors in terms of two secret keys. The algorithm recovers the wa-termark without any reference to the original image. Experimental results show that the new watermarking method performs well in bothimperceptibility and robustness.更多还原