面向位平面的自嵌入式可逆数据隐藏方法

Self-embedded Reversible Data Hiding Method for Bit Plane

针对现有加密图像可逆数据隐藏方法中存在的嵌入率低、直接解密后失真率高的问题,提出了一种面向位平面的自嵌入式的加密图像可逆数据隐藏方法.在图像加密阶段,通过块置换、位平面置换及流加密的方法加密原始图像.在信息嵌入阶段,低位平面被划分成同一像素块和非同一像素块,进行块重排后,利用块内像素间的相关性进行信息嵌入,可以获得较大的信息嵌入空间.在接收阶段利用密钥实现数据提取,图像解密和图像无损恢复的分离操作.实验结果表明该算法易于实现,具有较高的信息嵌入率并且直接解密后可以获得近似的原始图像.

Aiming at the problems of low embedded rate and high distortion rate after direct decryption in existing encrypted image reversible data hiding methods,a bit plane-oriented self-embedded encrypted image reversible data hiding method is proposed.In the image encryption stage,the original image is encrypted by block replacement,bit plane replacement,and stream encryption.In the information embedding stage,the low-level plane is divided into the same pixel block and non-same pixel block.After the block rearrangement,the correlation between the pixels in the block is used for information embedding to obtain a larger space for information embedding.In the receiving stage,the key is used to separate data extraction,image decryption and image lossless recovery.Experimental results show that the algorithm is easy to implement,has a high information embedding rate and can obtain approximate original images after direct decryption.