一种新的彩色图像盲水印算法

为解决水印的盲提取问题并将水印技术应用到彩色图像中,提出了一种新的基于子带DCT（discrete cosine transform）系数量化的彩色图像盲水印算法.首先将彩色图像从RGB空间转换到YUV空间,然后在Y、U、V三分量的子带DCT系数中选取视觉重要系数并对其进行量化,完成水印的嵌入.水印的提取不需要原始图像.仿真实验证明,算法具有较高的透明性,并且对于常用的攻击方法（如有损压缩、高斯噪声、滤波和剪切等）具有很好的鲁棒性.

Novel color image blind watermarking algorithm

To solve the blind extracting problem of the watermark, and meet the color image watermarking application, a novel sub-band DCT coefficients quantization based color image watermarking algorithm was proposed. The algorithm firstly transforms the color image from RGB color space to YUV color space, selects the perceptually significant coefficients from the sub-band DCT coefficients, and quantifies them to accomplish the watermark embedding. The watermark can be detected without the original image. Experimental results show that the algorithm is robust to common attacks.