摘要
提出一种在图像离散余弦变换(DCT)域内的信息隐藏算法。为了在基本保证隐秘图像视觉质量的前提下有效提高载体图像的信息隐藏量,该方法使用随机序列进行间隔控制,选择信息嵌入位,把随机序列的种子看成密钥,通过比较变换后的2个DCT系数完成信息的隐藏。试验结果表明,该算法可以兼顾秘密信息隐藏的不可见性和鲁棒性,密钥空间大,能够实现自适应隐藏和提取信息的盲检测。
This paper presents an information hiding algorithm in Discrete Cosine Transform（DCT） domain. In order to improve the embedding capacity of a cover-image while maintaining the stego-image quality acceptable, it uses the random sequence to carry out distance control, selects the bit in which the secret information is embedded, regards seed of the random sequence as key, and completes information hiding by comparing the two DCT coefficients changed. Experimental results show that the method can take into account invisibility and robusticity. It can provide larger key space, achieves the adaptive hiding of the information, and extracts the embedding data from the stego-image without referencing to the original cover-image.
出处
《计算机工程》
CAS
CSCD
北大核心
2009年第14期168-170,共3页
Computer Engineering
基金
新疆高校科研基金资助重点项目(XJEDU2007I07)
关键词
信息隐藏
随机序列
离散余弦变换系数
间隔控制
information hiding
random sequence
Discrete Cosine Transform（DCT） coefficient
distance control
