第二代Curvelet变换域的信息隐藏方法  

Information Hiding Method of Second Generation Curvelet Transform

作　　者：王晨毅[1] 王建军[1] 

机构地区：[1]复旦大学电子工程系,上海200433

出　　处：《信息与电子工程》2008年第2期105-110,共6页information and electronic engineering

摘　　要：提出了一种基于第二代Curvelet变换的信息隐藏方法。该方法以数字图像作为掩体介质,根据Curvelet子带内各向异性尺度关系选择部分系数,并对其实部和虚部分别进行量化嵌入。引入了误差控制编码以减少误码,在提取秘密信息时不需要参考原掩体介质,实现了密文的盲提取。与DCT域Jsteg算法和小波域量化索引调制算法进行比较,结果表明,提出的算法具有较高图像质量和更大的嵌入容量。A novel information hiding method based on second generation Curvelet Transform is proposed. The method uses digital images as the host media and chooses the coefficients to be embedded according to the anisotropy scaling relation in Curvelet subbands. Secret information are embedded into both the real and imaging part of the coefficients. Error Control Coding（ECC） is used for lower bit error rate and blind secret extraction is also achieved. Compare the proposed algorithm with the existing Jsteg method in DCT domain and Quantization Index Modulation（QIM） method in wavelet domain, and the experimental results show that the new algorithm has better image quality and larger embedding capacity.

关 键 词：图像隐写 CURVELET变换 各向异性尺度关系 量化 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]