摘要
提出了一种基于小波包变换(WPT)和离散余弦变换(DCT)的彩色图像双水印算法:首先将彩色图像由RGB色彩空间转化为YCbCr色彩空间,并提取其亮度分量Y,然后对亮度分量Y进行三层小波包变换产生64个子带,结合人眼的视觉特性,根据不同子带的特点,选取出合适的子带用来嵌入水印,对不同特点的子带采用不同的嵌入算法,将置乱后的水印嵌入到选定的子带中。理论分析与仿真结果表明,该算法具有很好的鲁棒性和不可见性。
A dual watermarking algorithm for colored images based on wavelet packet transform （WPT） and discrete cosine transform is proposed in this paper.Convert the color image from RGB space model image into YCbCr space model image first,then the luminance component Y is chosen and decomposed by three wavelet packet transform.Different sub-band using different embedding algorithm Combination of visual characteristics.Theoretical analysis and experiment results show that the watermark generated with the proposed algorithm is imperceptible and of great robustness.
出处
《微计算机信息》
2010年第14期189-191,共3页
Control & Automation
关键词
双水印
小波包变换
DCT变换
盲检测
dual watermarking
wavelet packet transform
DCT transform
blind detection
