Separable Reversible Data Hiding in Encrypted Images Based on Difference Histogram Modification

Separable Reversible Data Hiding in Encrypted Images Based on Difference Histogram Modification
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基于差分直方图修正的加密图像可分离可逆数据隐藏

DOI:
10.1155/2019/7480147
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发表时间:
2019-06
影响因子:
--
通讯作者:
Su Shubing
Su Shubing
中科院分区:
计算机科学4区
文献类型:
--
作者:
Xu Dawen;Su Shubing

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提出一种基于邻域预测的高效加密图像可逆数据隐藏方法,包括图像加密、加密域可逆数据隐藏和隐藏数据提取。首先将封面图像划分为不重叠的块,然后通过模运算对每个块中的像素值进行加密。因此,满足特定条件的块中的线性预测差异在加密前后是一致的,保证数据提取与图像解密完全分离。另外,利用块中三个相邻像素的线性加权来预测当前像素,可以提高预测精度。不知道原始图像内容的数据隐藏者可以基于预测差直方图修改来嵌入附加数据。数据提取和图像恢复没有任何错误。实验结果证明了该方案的可行性和效率。
In this paper, an efficient reversible data hiding method for encrypted image based on neighborhood prediction is proposed, which includes image encryption, reversible data hiding in encrypted domain, and hidden data extraction. The cover image is first partitioned into non-overlapping blocks, and then the pixel value in each block is encrypted by modulo operation. Therefore, the linear prediction difference in the block that satisfies the specific condition is consistent before and after encryption, ensuring that data extraction is completely separable from image decryption. In addition, by using the linear weighting of three adjacent pixels in the block to predict the current pixel, the prediction accuracy can be improved. The data-hider, who does not know the original image content, may embed additional data based on prediction difference histogram modification. Data extraction and image recovery are free of any error. Experimental results demonstrate the feasibility and efficiency of the proposed scheme.
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