一种基于二维倒谱变换的数字水印

A new digital watermarking algorithm in Cepstrum domain

提出了一种基于二维倒谱系数能量的数字图像水印新算法。倒谱域水印算法克服了水印嵌入时频段选择的限制,增大了水印嵌入的信息量,避免了块效应。该算法利用置乱变换预先对水印图像进行处理,更加提高水印的抗剪切性和鲁棒性,实验结果表明:算法对于JPEG压缩、剪切、加噪等方面都有很好的抗攻击性。

A new digital image-watermarking algorithm based on the 2-dimension Cepstrum transformation is presented. The new algorithm increases the quantity of tile embedded information. This method for the copyright protection demonstrates the improved robustness against the JPEG compression, image cropping, scaling and noising in comparison with the existing watermarking algorithms. The original image and key are needed to extract the watermarking signal.