基于改进亚仿射变换的图像信息隐藏算法  

Image Information Hiding Algorithm Based on Improved Sub-affine Transformation

作　　者：卢斌[1] 王冰[1] 

机构地区：[1]西北大学信息科学与技术学院,西安710127

出　　处：《计算机工程》2011年第11期164-166,169,共4页Computer Engineering

基　　金：陕西省科技攻关计划基金资助项目(200405-G25)

摘　　要：为改进仿射变换的自身安全性,提出一种基于改进亚仿射变换的图像融合信息隐藏算法。通过改进的亚仿射变换对秘密信息图像做预处理,将密钥从6个提升到8个,并结合Logistic混沌序列利用图像融合技术完成秘密信息的嵌入。实验表明,该亚仿射变换有较好的置乱效果和安全级别,而Logistic混沌序列相比于传统隐藏算法中的混合因子具有更大的密钥空间,能提高图像隐藏的安全性。An information hiding algorithm of image fusion technology is proposed based on the improved sub-affine transformation.This algorithm preprocesses the secret information image by using the improved sub-affine transformation,increases the key of the original algorithm from six to eight,and completes hiding secret information by using image fusion technology based on Logistic chaos sequences.Experimental results show that sub-affine transformation has good scrambling effect and safety level,and Logistic chaos sequence which enhances the security of image hiding compared with traditional hiding algorithm＇s blend factors have larger space.

关 键 词：信息隐藏 改进的亚仿射变换 LOGISTIC混沌序列 图像融合 

分 类 号：TN919.81[电子电信—通信与信息系统]