基于Matlab的数字水印系统的GUI设计

数字水印技术为数字信息安全和版权提供了一种有效的保护措施。本文通过小波变换和离散余弦变换的方法，首先对载体彩色图像进行小波变换，然后对变换后载体图像的低频子带再进行离散余弦变换，最后将彩色水印图像嵌入到离散变换的直流系数上。结果证明，在抗噪声攻击、JPEG压缩、小幅度剪切方面利用Matlab软件构建的数字水印系统可达到效果良好，稳健性强。

A watermarking system based on Matlab GUI design

Digital watermarking technology for digital information security and copyrights provides an effective protection measures. In this paper, through the method of wavelet transform and discrete cosine transform,firstly wavelet transform is used in host color image, then discrete cosine transform is used in the low frequency of wavelet transform. In the end, the color watermark image is embedded into the DC-coefficient of discrete cosine transform. The experimental results show that the proposed digital watermarking system which was used by Matlab is better and robust in adding noise,JPEG compression and a little cropping.