一种基于伪随机序列水印的二维倒谱域图像水印算法

An image watermarking algorithm in the 2-D cepstrum domain based on a pseudo-random sequence watermark

将二维倒谱变换引入到图像水印算法,提出了一种新的倒谱域数字图像水印算法.该算法将一伪随机序列作为水印嵌入到宿主图像的二维倒谱系数中,水印检测不需要原始图像.计算机仿真结果表明所提方法满足水印的不可感知性,且可抵抗多种水印攻击,如JPEG压缩、加性和乘性噪声干扰、滤波以及其他图像处理操作等.

Digital watermarking can provide copyright protection and authentication to the owners or users of multimedia. The two major popular algorithms are in the space domain and transform domain. In order to further improve the robustness of the image watermarking algorithms, a 2-dimensional cepstrum transform is introduced in image watermarking algorithms and a novel image watermarking scheme in the eepstrum domain is proposed in this paper. A pseudo random sequence is used as the watermark and is embedded into the host image in its 2-dimensional cepstrum domain. The embedded watermark can be detected without the original image. Extensive computer simulation results show that the proposed algorithm meets the imperceptibness and is robust to a few kinds of watermarking attack, such as JPEG compression, additive and multiplicative noise, filtering and some other image processing operations.