基于DCT的图像盲水印算法研究与实现

本文提出一种基于DCT变换的数字图像盲水印嵌入算法,通过对水印图像进行置乱加密与随机产生嵌入位置来保证水印安全性,实验证明此算法具有较好的不可见性,能够抵御JPEG压缩、高斯模糊、均值滤波、椒盐噪声、部分剪切的攻击,具有较好的鲁棒性。盲水印嵌入算法中,对嵌入水印的提取不需要原始图像,这给数字图像的版权检测提供了便利,可用于Internet的数字图像的版权保护。

Research and Implementation of Blind Watermarking Algorithm of Images Based on DCT

This paper gives out a blind watermarking algorithm for digital image based on DCT. This algorithm encrypts the watermark image and chooses embed-position randomly for the sake of security. The experimental results indicate that the algorithm is imperceptibility and robust to some common attacks. In fact, blind watermarking algorithm can pick up watermark without original image, which conveniences the copyright protection of digital image communicated on Internet.