几种图像数据隐藏方法的比较研究  

Comparative Study of Some Image Data Hiding Methods

作　　者：金聪[1,2,3] 彭嘉雄[1] 

机构地区：[1]华中科技大学图像识别与图像识别与人工智能研究所,图像信息处理与智能控制教育部重点实验室,武汉430074 [2]华中师范大学计算机科学系,武汉430079 [3]中国科学院研究生院信息安全国家重点实验室,北京100039

出　　处：《信号处理》2004年第2期127-132,共6页Journal of Signal Processing

基　　金：国家自然科学基金项目资助(F60085002);中国科学院信息安全国家重点实验室开放课题基金(No.03-02);湖北省教育厅重点基金项目资助(2003A012)

摘　　要：近年来,图像数据隐藏技术得到了突飞猛进的发展,得到了很多鼓舞人心的成果。在图像隐藏技术中,使用最多的图像嵌入规则有三种:加法嵌入规则、乘法嵌入规则以及基于融合技术的图像嵌入规则。本文对这三种图像嵌入规则的性能进行了分析和研究,通过比较我们发现,如果将图像隐藏过程看作是一个水印信道模型,则基于融合技术的图像嵌入规则所能隐藏的信息量远远高于另两种嵌入规则,而乘法嵌入规则其水印信道容量不受原始图像DCT系数标准差变化的影响,因此,在原始图像DCT系数标准差不稳定的情况下,采用乘法嵌入规则是一个好的选择。Though image data hiding (Digital watermarking) as a tool for copyright protection is quite recent, a great deal of research has been carried out mainly addressing the development of robust, yet unperceivable, watermarking strategies. As it is now becoming evident, however, other important issues have to be analyzed in order to make watermark-based copyright protection feasible. Among them, the analysis and comparison of the performance of additive embedding method, multiplicative embedding method and fusion embedding method plays a mayor role. In this paper, the watermarking is assumed to consist in the modification of a set of full-frame DCT coefficients. The watermark channel is modeled by letting the watermark be the signal and the original image DCT coefficients the noise introduced by the channel. To derive the capacity of each coefficient, the channel transition matrix is computed. An evaluation of the number of bits that can be hidden within an digital image by means of frequency domain watermarking, using three embedding methods respectively, is given. These computative results are derived by using three embedding methods, respectively. Experimental results show that the performance of fusion embedding method is the best.

关 键 词：图像隐藏 嵌入规则 版权保护 信道容量 信息隐藏 

分 类 号：TN911.73[电子电信—通信与信息系统]