摘要
为了解决水印盲检测中的水印定位问题,提出了一种在小波变换域中基于图像纹理特征和分形调制的盲水印算法。以熵值和方差等特征值作为划分图像块类型的依据,从中选择适当的区域嵌入水印。水印序列采用通过分形调制产生的分形序列。检测算法无需原始图像,只需要保留块嵌入位置作为密钥。实验结果证明,该算法具有很好的鲁棒性和不可见性。
To localize watermarking in blind detection, it is brought forward that a blind watermarking method is based on the information of texture and fractal modulation in discrete wavelet transform （DWT） domain. According to the spatial features of the host image such as entropy and variance, the image is divided into several kinds of blocks. The best embedding places are obtained based on the types of blocks. And watermarking is modulated into the fractal sequence and embedded into these blocks. To detect the watermarking, the embedding position of the watermarking is kept as a key. Experimental results show that the methods to make image distortion lower and be robust-easy to use.
出处
《计算机工程与设计》
CSCD
北大核心
2007年第16期3932-3934,共3页
Computer Engineering and Design
关键词
数字水印
纹理特征
离散小波变换
分形调制
版权保护
digital watermarking
information of textures
discrete wavelet transform
fractal modulation
copyright protection
