基于彩色QR码的信息无损提取隐藏算法  

Lossless information extraction and hiding algorithm based on color QR code

作　　者：李志茹 陈元枝[2] 姜文英[1] 张维纳 LI Zhiru;CHEN Yuanzhi;JIANG Wenying;ZHANG Weina(School of Electronic Engineering and Automation,Guilin University of Electronic Technology,Guilin 541004,China;School of Optoelectronic Engineering,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学电子工程与自动化学院,广西桂林541004 [2]桂林电子科技大学光电工程学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2023年第1期56-62,共7页Journal of Guilin University of Electronic Technology

基　　金：广西自动检测技术与仪器重点实验室基金(YQ20106)。

摘　　要：针对当前信息隐藏算法中秘密图像大多是信息量较小的二值图像或灰度图像,提取的秘密图像是有损的等问题,提出一种适用于较大编码容量的彩色QR码的无损提取信息隐藏算法。该算法先对载体图像三通道分解,将三分量分为4×8互不重叠的块,通过DCT变换获得分块的低频分量;彩色QR码通过Arnold置乱后,采用Logistic映射加密,将加密彩色QR码三通道分解,隐藏于彩色载体图像相应分块的低频分量中,并对DCT隐藏算法中由数据类型转换产生的舍入误差进行隐藏,在秘密图像提取过程中用于误差补偿。实验结果表明,该算法有效地完成了彩色QR码的加密隐藏与无损提取,具有较好的不可见性及安全性,该法亦适用于普通彩色秘密图像。In the current information hiding algorithms,most of the secret images are binary images or gray-scale images,and the extracted secret images are not lossless.A lossless information hiding algorithm for color QR codes with large coding capacity is proposed.Firstly,the carrier image is decomposed into three channels,then each channel is divided into blocks separately.The low-frequency components of the block areas are obtained by DCT transformation.Color QR code is scrambled by Arnold,and then encrypted by Logistic mapping,the three channels of encrypted color QR code are hidden in the low-frequency components of corresponding channel blocks of color carrier image.The rounding errors caused by data type transformation in the process of DCT hiding algorithm is hidden,which are used for data compensation in the process of secret image extraction.The experimental results show that the algorithm can effectively complete the hidden and lossless extraction of color QR code and common color secret image,and has good invisibility and security.

关 键 词：信息隐藏 图像加密 ARNOLD置乱 LOGISTIC映射 DCT 无损提取 舍入误差 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]