基于DCT变换的数字水印研究及其MATLAB实现

Study on digital watermark based on DCT and the realization on MATLAB simulation

数字水印技术是在数字产品的版权保护中起着非常重要的作用。概括了数字水印技术的现状及其基本原理,提出了一种基于离散余弦变换(DCT)的数字水印算法,并用MATLAB对水印的嵌入和提取进行了仿真实验。结果表明,该方法具有良好的隐蔽性和鲁棒性。

The technique of digital watermark plays an important role in the protection of copyright of digital products.This paper sums up the status of the technique of digital watermark and its fundamental,and proposes a digital watermarking algorithm based on DCT,then gives out the experiment of the DCT algorithm on MATLAB.The result proves the masking and robustness of the algorithm.