一种基于小波变换和DCT量化的彩色图像盲水印算法  

A Blind Watermarking Algorithm for Color Image Based on Wavelet Transform and DCT Quantization

作　　者：王楠[1] 王晅[1] 赵杰[1] 何冰[1] 

机构地区：[1]陕西师范大学物理与信息技术学院,陕西西安710062

出　　处：《沈阳大学学报》2008年第3期96-98,102,共4页

摘　　要：采用YIQ色彩空间,把载体亮度分量Y进行小波分解,将水印数据嵌入其低频子带的DCT系数中去.嵌入水印前采用置乱变换将水印图像置乱,消除像素间的空间相关性,提高算法的抗攻击能力.结果表明,该算法对常见的噪声、滤波、剪切、JPEG压缩等攻击有较强的鲁棒性.The RGB space model of original color image is transformed to YIQ model and component Y is transformed by DWT, and then the watermark is embedded in low frequency in DCT domain. Before embedding the watermark, the image confusion method is used to eliminate the correlation of each pixel and the proposed method is improved to resist all kinds of attacks. The experiment shows that the method is robust to adding noise, filtering, cropping and JPEG compression.

关 键 词：数字水印 YIQ色彩空间 小波变换 离散DCT变换 图像置乱 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]