采用均值和模运算变换域图像水印算法  

A Transform Domain Image Watermarking Algorithm Using Mean Value and Modular Arithmetic

作　　者：王雪瑞[1] 周岩[1] 

机构地区：[1]河南工程学院计算机学院,郑州451191

出　　处：《西安文理学院学报（自然科学版）》2017年第1期47-51,55,共6页Journal of Xi’an University(Natural Science Edition)

摘　　要：为了满足数字版权保护的要求,在离散小波变换和数字水印技术的基础上,提出了一种采用均值和模运算的图像水印算法,利用均值嵌入水印,均值的稳定性高于单一数据,大大提高了水印的鲁棒性.对图像采用小波分解法,再把其低频子带划分成不重叠的系数块,最后采用调制系数块均值修改小波系数并完成水印信息的嵌入.仿真实验结果:在含水印图像的峰值信噪比大于35 d B时,相似度NC接近于1,通过与已有算法进行对比,说明了该算法具有较好的鲁棒性.In order to meet the requirement of digital copyright protection, by using of mean val- ue and modular arithmetic, an image watermarking algorithm based on the discrete wavelet transform and the digital watermarking technology is proposed. This algorithm uses mean em- bedding watermark, the stability of its mean value is higher than that of single data, and the ro- bustness of the watermark is greatly improved. In this algorithm, the wavelet decomposition method is applied to the image, then the low frequency sub-band is divided into non-overlap- ping coefficient blocks. Finally, the mean value of the modulation coefficient blocks is used to modify the wavelet coefficient, and the watermark information is embedded. The simulation re- suits show that when the peak signal to noise ratio of watermarked image is greater than 35 dB, the similarity of NC is close to 1. Compared with the existing algorithms, it is proved that the algorithm has good robustness.

关 键 词：版权保护 模运算 图像水印 变换域 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论]