基于异或-置乱框架的图像可逆数据隐藏仿真

针对因图像加密、解密过程中图像还原度较差,数据嵌入率较低,导致图像传输过程中图像质量差,安全性低的问题,提出一种基于异或-置乱框架的图像可逆数据隐藏方法。分析相邻像素间位异或-置乱法,使用位异或和像素位置置乱方式对初始图像做加密处理,得到初始加密图像,根据隐藏密钥特征选取一部分像素,利用替换方法把选取像素嵌入隐藏数据中,使用加密密钥将隐藏数据提取出来,最后通过邻域预测方式对加密图像做解密处理,并根据像素波动性算出各邻域模块最高位是否发生改变,还原初始图像。仿真结果表明,采用所提方法得到的图像还原性较好,数据嵌入率较高,可以有效保护图像传输中的安全,并保证图像质量,具有一定的实践价值。

Image Reversible Data Hiding Simulation Based on XOR-Scramble Frame

Due to poor image restoration and low data embedding rate during image encryption and decryption,this paper presented a method to hide the image reversible data based on XOR-scramble frame.At first,we analyzed the bitwise XOR-scrambling method between adjacent pixels,and then encrypted the initial image by bitwise XOR and pixel position scrambling,so as to obtain the initial encrypted image.According to the hidden key feature,we selected some pixels and used the replacement method to embed these pixels into the hidden data.After that,we extracted the hidden data by the encryption key.Finally,we used the neighborhood prediction method to decrypt the encrypted image.According to the pixel fluctuation,we calculated whether the highest bit of each neighborhood module changed.Finally,we restored the original image.Simulation results show that the image obtained by the proposed method has better reducibility and higher data embedding rate,which can effectively protect the image transmission security and ensure image quality.