摘要
基于灰关联的理论思想以及信息隐藏的特点,文中定义了一种新型的灰关联系数的计算方法,并在此定义的基础上提出了一种新的基于彩色图像的信息隐藏算法。该算法通过对原始载体图像DWT域中LH和HL频带的系数进行调整,将秘密数据隐藏到彩色载体图像各个颜色分量的LH和HL频带系数上,根据系数间的灰关联系数大小对秘密信息进行提取,提取时不需要覆盖图像,实现了秘密信息的盲提取。实验结果表明,该算法不仅具有较好的透明性,而且能够对一些常见的攻击如叠加噪声、几何剪切、JPEG压缩、滤波等均具有较好的鲁棒性。
According to grey relation theory and the characteristic of information hiding, a new calculation method for grey relation coefficient was defined. Furthermore, and a new information hiding algorithm based on color image was proposed. This algorithm justified LH and HL frequency band coefficients in DWT（Discrete Wavelet Transform） of original carrier image and hid the secret data in LH and HL frequency band coefficients of color carrier image＇s every color weight. The secret data was extracted according to grey relation coefficient and the cover image was not needed. The experimental results show that the algorithm is not only invisible, but also robust against various signal processing such as noise adding, cropping, JPEG compression, and filtering.
出处
《计算机应用》
CSCD
北大核心
2006年第9期2153-2155,共3页
journal of Computer Applications
基金
航空科学基金资助项目(04F53035)
关键词
灰关联
信息隐藏
盲提取
离散小波变换
grey relation
information hiding
blind testing
DWT（Discrete Wavelet Transform）
