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.
