摘要
由于数字图像的加密安全性较低,导致图像可逆信息隐藏效果较差、隐藏传送时间较长,为此提出二维混沌映射图像可逆信息隐藏传送方法。依据二维混沌映射原理,分析其左映射与右映射的处理过程,通过像素点的不同取值,完成图像的映射和折叠处理;采用可逆信息隐藏的加权系数与八位无符号量化法,生成灰度可逆信息隐藏图像,将二维混沌映射的次数作为密钥,应用扩散函数与密钥对隐藏图像可逆信息进行加密,获取加密图像,通过网络资源平台发送方将加密图像传送至接收方,实现图像可逆信息隐藏传输。仿真结果表明,所提方法不仅能够达成初始图像可逆信息的有效隐藏与加密,且可逆信息隐藏传送时间较短。
Due to low security of digital image encryption,the information hiding effect of reversible image is poor and the transmission time is long.Therefore,a method of hiding transmission for reversible information in two-dimensional chaotic mapping image was proposed.According to the principle of two-dimensional chaotic mapping,the processes of left mapping and right mapping were analyzed.The image was mapped and folded by different values of pixel.The weighted coefficient of reversible information hiding and 8-bit unsigned quantization were used to generate the gray reversible information hiding image.The number of two-dimensional chaotic maps was used as the key.Moreover,the diffusion function and key were used to encrypt the reversible information and thus to obtain the encrypted image.After that,the encrypted image was transmitted to the receiver through the sender of network resource platform.Finally,the reversible information hiding transmission was achieved.Simulation results prove that the proposed method not only achieves effective hiding and encryption for the reversible information in initial image,but also reduces the transmission time of reversible information.
作者
吴婷
阳溶冰
WU Ting;YANG Rong-bing(School of Computer Science,Zhongyuan University of Technology,Zhengzhou Henan 450007,China;University of Mining and Technology,Xuzhou Jiangsu 221116,China)
出处
《计算机仿真》
北大核心
2020年第11期184-188,共5页
Computer Simulation
基金
国家自然科学基金项目(U1404606)。
关键词
二维混沌映射
图像可逆信息
隐藏传送
加权系数
Two-dimensional chaotic map
Reversible image information
Hidden transmission
Weighting coefficients
