基于整型小波变换的彩色图像盲水印算法*

针对多数图像水印算法将灰度图像嵌入宿主图像的研究现状，提出了一种基于整型小波变换将彩色数字水印嵌入到彩色宿主图像中的算法。本算法结合人眼的视觉掩蔽特性, 实现了数字水印嵌入位置的自适应确定，同时采用量化小波系数的方法将彩色水印嵌入到彩色图像YCrCb模式的Y分量中去，彩色水印的提取不需要原始水印和原始宿主图像。实验证明,水印具有良好的不可见性,并且对常见的图像处理操作具有很强的鲁棒性。

Blind digital watermarking algorithm for color image based on integer wavelet transform

Researched most of the images watermarking methods about gray image embedded into host image at present,this paper proposed a digital watermarking algorithm for color watermark embedded to color host image based on IWT (Integer Wavelet Transform).According to the human visual system peculiarity and quantizing the wavelet coefficient,embedded encrypted watermark adaptively into the Y luminance component of the YCrCb mode in IWT domain.The algorithm allows extracting watermark without the help of original watermark and host image. Experiment results show that the embedded watermark is invisible and robust against common image processing.