基于DC分量和AC分量相结合的数字水印技术  

Digital watermarking technology based on DC and AC components

作　　者：孙见青[1] 汪荣贵[1] 李守毅[1] 

机构地区：[1]合肥工业大学计算机与信息学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2007年第7期825-828,共4页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(60575023);教育部博士点基金资助项目(20050359012)

摘　　要：文章提出了一种将DC分量与AC分量相结合的数字水印新方法,该方法将原始图像分块并根据人眼视觉系统纹理掩蔽特性,提取出原图像每块的纹理特征,由该纹理特征在原图像的每块DC系数和3个AC系数上嵌入水印。实验结果证明,该方案自适应性好、嵌入的水印的信息量大,并且对图像处理和常见的图像攻击具有很好的稳健性。A watermarking algorithm based on the DC and AC components is proposed. The original image is divided into blocks first, and the texture feature of the image is extracted according to the feature of texture masking of the human vision system. Then the watermark image is embedded in the DC coefficient and three AC coefficients of every block image according to the texture feature. Experiment results show that the proposed algorithm has good self-adaptivity, that the embedded watermarks are very robust against noise and commonly used image processing techniques, and that the size of the watermark image is very large.

关 键 词：数字水印 DC分量 AC分量 纹理特征 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]