一种基于分块的DCT域数字图像水印算法

A block-based DCT algorithm of digital image watermarking

本文提出了一种有效的基于分块的DCT域数字图像水印算法。该算法首先对水印图像进行置乱处理,再将变换后的水印图像嵌入到DCT变换后的原始图像中。实验证明该算法具有很好的鲁棒性和不可见性,并能有效地抵抗JPEG压缩和旋转几何攻击。

This paper proposes an effective block- based DCT algorithm of digital image watermarking. Firstly the algorithm scrambles the watermark, and then embeds the transformed watermark in DCT domain of the original image. Experiments demonstrated that the algorithm is robust and invisible, and can effectively resist the attacks of JPEG compression and rotation.