信息预处理的加密域大容量可逆图像信息隐藏

HIGH CAPACITY REVERSIBLE DATA HIDING IN ENCRYPTED IMAGES BY INFORMATION PREPROCESSING

采用数独变换和Arnold变换对原始图像加密,完全保留了图像的冗余空间。嵌入过程中,利用DES加密算法对信息进行了压缩预处理,平均压缩了1.5倍;采用最高有效位算法将压缩后的信息嵌入载密图像。接收者采用异或运算提取出秘密信息,同时根据误差值完全恢复载体图像。实验表明,提出的方法不仅能够实现大容量信息可逆隐藏,而且还能完全重构载体图像,是一种可以广泛应用的加密域信息隐藏方法。

In this paper,the cover image was encrypted by jointly using Sudoku and Arnold chaos encryption.The encrypted images retained the vacated room.In the embedding phase,we used DES algorithm to preprocess the information,and the binary bit strings were compressed by a factor of 1.5.The compressed information were embedded into the encrypted image by most significant bit(MSB)algorithm.The receiver extracted the information by XOR operator,and reconstructed the original image with error.The experimental results prove that the proposed method not only can realize RDHEI,but can also reconstruct the cover image completely,which is a widely used method on RDHEI.