基于离散余弦变换的数字水印算法

Digital watermarking algorithm based on DCT

针对数字产品的版权保护问题,提出了一种基于离散余弦变换的数字水印算法;通过对水印攻击原理的分析,提出了由认证中心分密钥和作者分密钥组成的水印密钥生成方案,较好地解决了水印在抵抗解释攻击方面问题,提高了水印信息的安全性。实验结果表明,该算法不仅具有良好的不可见性,而且对JPEG压缩、高斯噪声和图像剪切等攻击有理想的鲁棒性。

A digital watermarking algorithm based on DCT is proposed about copyright protection of the digital products. A key producing scheme is proposed by attestation center key and author key after analying the principle of watermarking attack, it can solve the explanation attack well and improve the watermarking security. The experiment results show that watermarking embedded by the algorithm is invisible and robust enough to JPEG compressing, Gause noise and the explanation attack, and so on.