一种统计特性的数字水印算法

Watermarking algorithm based on statistical property

提出一种鲁棒的DCT域盲水印算法,将DCT系数进行特殊的自定义排列分组,并根据奇偶差实现水印的最优化嵌入。该算法突破了传统的分块、寻找合适中频系数模式,解决了合适中频系数难找且嵌入容量小的问题。实验表明该算法计算简单,且具有良好的不可见性,并且在抵抗噪声和JPEG压缩攻击方面具有较强的鲁棒性。

A novel robust blind watermarking algorithm in DCT domain was proposed. The DCT coefficients are arranged in a specific way, and then the watermark is embedded based on odd-even difference for optimal embedding. This algorithm works in a new pattern other than block-division and search of the DCT coefficients in the middle frequencies in the traditional pattern, which can overcome the problem in searching suitable coefficients in the middle frequencies for watermark embedding and the small embedding capacity. Experimental results show that the algorithm is simple and good at perceptual transparency as well as robustness against noise and JPEG compression.