摘要
为了能够更好的满足水印的鲁棒性和不可见性,提出了一种基于关系的DWT域盲水印算法,首先对原始图像进行二级小波变换,在小波系数的中频子带中,根据比较中心系数与邻域系数均值关系的方法来嵌入水印,水印嵌入前进行了最优置乱处理,使得修改的中频系数最少,从而保证了较好的不可见性。在水印的提取过程中无需参考原始图像,实现了全盲检测。通过对嵌入水印的图像进行加入噪声、滤波、压缩以及裁剪等大量图像处理实验,均能正确检测出水印,结果表明算法具有很好的感知效果以及较强的鲁棒性,可用于数字图像的版权保护。
A blind watermarking algorithm based on the relationship of coefficients in DWT Domain is proposed. Firstly, the original image is decomposed through three - layer wavelet transform, then the watermark is embedded according to comparing the relationship of center and adjacent coefficients in the middle - frequency coefficients of o- riginal image. The watermark has been scrambled optimally before embedding to guarantee a better invisibility, and it can be extracted from the watermarked image without the original image. Most experimental results show that the proposed algorithm can attain robustness to common image processing and attacks, and it can also used to protect the copyright ownership of digital products.
出处
《计算机仿真》
CSCD
北大核心
2009年第7期146-148,255,共4页
Computer Simulation
关键词
数字水印
小波变换
关系
盲检测
Digital watermarking
Wavelet transform
Relationship
Blind detection
