摘要
提出了一种基于二维DCT变换的图像信息隐藏方法,经过二维DCT变换后的图像能量集中在低频部分,考虑到人眼的视觉特性,图像的高频部分可视为视觉冗余部分,可以把有用信息隐藏在变换载体图像的高频部分,即以牺牲图像高频信息来达到信息隐藏的效果,通过MATLAB实现这一思想,对隐藏后的图像质量做了特征分析,并对下一步实验做出了设想.
A method of the image information hiding based on two-dimensional DCT transform is proposed. After the two-dimensional DCT transform being made, the image energy concentrates in low-frequency while the high-frequency part can be regarded as vision redundant, considering the visual characteristics of the man＇s eyes, the useful information can be hided in the transformation of the vector image＇s high-frequency part, name- ly by sacrificing the image＇s high frequency information to achieve the effect of information hiding. Through realizing this idea by MATLAB, the quality of the image is analyzed and the next step of the experiment is conceived.
出处
《光电技术应用》
2009年第3期63-66,共4页
Electro-Optic Technology Application
关键词
信息隐藏
DCT变换
视觉特性
information hiding
DCT transformation
visual characteristic
