基于小波域的自适应信息隐藏算法  

Adaptive Information Hiding Algorithm based on DWT

作　　者：马林[1] 赖惠成[1] 

机构地区：[1]新疆大学,新疆乌鲁木齐830046

出　　处：《通信技术》2010年第11期115-117,共3页Communications Technology

摘　　要：提出了一种基于小波域的自适应彩色信息隐藏算法。该算法通过对YCbCr色彩空间的Y分量低频系数(LY)进行纹理分析,以及利用R.G.B分量低频系数(LR.LG.LB)位面小块的复杂度来确定LR.LG.LB的嵌入强度及嵌入位置。嵌入前,先利用改进的幻方变换和logistic映射对秘密图像进行置乱处理,然后根据纹理分析和位面复杂度,用秘密图像的位面小块替换LR.LG.LB的位面小块,使秘密信息的位面小块和载体小波系数位面小块的复杂度较为相似。实验结果证明,该算法不仅具有理想的嵌入容量,而且隐蔽性也较好。A new adaptive information hiding algorithm in wavelet domain is proposed in this paper.The idea is that the texture of Y componet low-frequency coefficient（LY）in YCbCr color space is analyzed,and based on the complexity of R.G.B component low-frequency coefficient（LR·LG·LB）bit-plane blocks,the embeding intensity and location of LR·LG·LB is determined.First,the secret image is was scrambled with the improved magic transformation and the logistic mapping,then based on the texture analysis and bit-plane complexity,the bit-plane blocks of secret message are replaced with the LR·LG·LB bit-plane blocks of cover message,thus making the complexity of secret message bit-plane blocks similar to that of the bit-plane blocks of the carrier wavelet coefficients.The experimental results show that the proposed method has ideal embedded capacity,and is also of better imperceptibility.

关 键 词：幻方变换 混沌置乱 位面复杂度 纹理分析 整数提升小波变换 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]