摘要
目的为得到更优的数字图像隐藏算法。方法鉴于在DCT域进行数字图像隐藏经常会出现“方块效应”以及人眼视觉系统的特点,提出基于视觉敏感度的图像隐藏算法,所用的混合参数序列由混沌动力系统的混沌映射产生。结果该算法按均匀块将一幅数字图像在DCT域隐藏于另一幅图像中。结论数值实验结果表明该算法易行、有效,隐藏后的图像效果好,而且能抵抗剪切等攻击,有一定程度的鲁棒性。
Aim In order to hide a secret image in a known image. Methods Considering the block effects of image-hiding in DCT domain and the characteristics of human vision system, a new scheme of image hiding is provided using of chaotic sequence and the characteristics of human vision system. In this scheme the chaotic sequence is used as blending parameters. According to the frequency response of human vision system, one image is classified into many different blocks. Results Because different blocks are blended with different parameter, image quality can be guaranteed. Conclusion Results of analytic experiments show that not only this scheme of digital image information hiding can be easily realized and is effective, but also the algorithm is robust and can resist many attacks such as cropping.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第5期741-746,共6页
Journal of Northwest University（Natural Science Edition）
基金
国家自然科学基金资助项目(60372072)
关键词
数字图像隐藏
DCT变换
人眼视觉系统
混合
混沌序列
复合换位变换
digital image information hiding
DCT domain
human vision system
blending
chaotic sequence
complex transposition permutation
