一种基于Arnold和量化的DCT域盲水印算法
A DCT domain blind watermarking algorithm based on Arnold and quantification
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摘要: 提出了一种基于Arnold和量化的DCT域盲水印算法:水印嵌入前先进行Arnold混沌置乱,以减少像素间的相关性并提高水印的安全性;嵌入时,根据待嵌入的水印位的值而采用不同的方法对子块中频系数进行量化;提取时,根据嵌入水印的系数的特性,提取出水印,水印提取过程不需要原始图像的参与,实现了盲提取.实验证明,该算法对于常见的攻击具有很好的鲁棒性和不可见性.Abstract: A DCT domain blind watermarking algorithm was proposed based on Arnold and quantification.Firstly Arnold chaotic scrambling to the watermarking is conducted before the embedding to reduce the correlation between pixels and improve the security of the watermarking;then according to the bit values of watermarking which is to be embedded,different methods are used to quantize the frequency coefficient of each sub-block;and then based on the coefficient characteristics of embedding watermarking,the watermarking is extracted in which the watermarking extraction process does not require the original image so as to achieved the blind extraction.Numbers of experiments show that the algorithm has good robustness and transparency in cope with common attacks.
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Key words:
- Amold scrambling /
- DTC domain /
- blind watermarking algorithm
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