基于DCT的自适应多重彩色图像盲水印算法

针对现有图像水印算法的一些不足,提出了一种基于离散余弦变换的自适应多重彩色图像盲水印算法。该算法根据彩色载体图像内容特点,将预处理后的不同二值图像水印自适应地嵌入到其绿色分量的离散余弦变换低频系数和中频系数,实现了不同水印在彩色载体图像中的嵌入及盲提取。实验结果表明,该算法在保证不可觉察性的前提下能够较好地抵抗各类常规攻击,具有良好的稳健性。

An adaptive color image blind multi-watermark algorithm based on DCT

Abstract: An adaptive multi-color image blind watermarking algorithm based on discrete cosine transform for some shortcomings of the existing image watermarking algorithm. The algorithm according to the color vector image content features, after pretreatment of the type of binary image watermark adaptively embedded into the green component of the discrete cosine transform low-frequency coefficient and intermediate frequency coefficients, the type of watermark embedding and blind extraction of the color vector image. The experimental results show that the algorithm under the premise of not aware of better able to resist all kinds of conventional attack, and it has a good robustness.