摘要
针对传统的扩频技术隐蔽性和鲁棒性的缺陷,本文提出了一种基于fourier变换域上的信息隐藏方法。此方法在秘密图象的预处理时先对秘密图象进行扩频然后对相同频率上嵌入的秘密信息进行混沌置乱,秘密图象的象素值随机的分布在不同原图象块的不同中频频段中,随机性使得信息隐藏的隐蔽性更强,分散性使得信息隐藏更抗局部攻击。这种方法有效的提高了信息隐藏的鲁棒性、隐蔽性。
An information-hiding technology based on FOURIER transformationaldomain is out forward against the concealment of frequency amplifying technology and the shortage of Robustness. When pre-processing a secret image by using this technology,the image will first be amplified in frequency,the secret mesage imbedded in the same frequency will then be chaotically scrambled,the pixels of the secret image will be randomly distributed amoong different pieces of images with different frequencies,and the image wil be concealed in a more secret way. This technology effectively enhances information＇s Robustness and concealment.
出处
《渤海大学学报（自然科学版）》
CAS
2008年第4期399-402,共4页
Journal of Bohai University:Natural Science Edition
关键词
扩频
混沌置乱
盲提取
图像处理
信息隐藏
FOURIER变换
frequency amplification
chaotic scrambling
blind extraction
image processing
information hiding
FOURIER transformation
