This code is the implementation of the paper "An Improved Reversible Data Hiding in Encrypted Images Using Parametric Binary Tree Labeling".
This work proposes an improved reversible data hiding scheme in encrypted images using parametric binary tree labeling(IPBTL-RDHEI), which takes advantage of the spatial correlation in the entire original image but not in small image blocks to reserve room for hiding data. Then the original image is encrypted with an encryption key and the parametric binary tree is used to label encrypted pixels into two different categories. Finally, one of the two categories of encrypted pixels can embed secret information by bit replacement. According to the experimental results, compared with several state-of-the-art methods, the proposed IPBTL-RDHEI method achieves higher embedding rate and outperforms the competitors. Due to the reversibility of IPBTL-RDHEI, the original plaintext image and the secret information can be restored and extracted losslessly and separately.
这项工作提出了一种改进的使用参数二叉树标记（IPBTL-RDHEI）的加密图像中可逆数据隐藏方案，该方案利用了整个原始图像而不是小图像块中的空间相关性来为隐藏数据保留空间。 然后，使用加密密钥对原始图像进行加密，然后使用参数二叉树将加密后的像素标记为两个不同的类别。 最后，两类加密像素之一可以通过位替换嵌入秘密信息。 根据实验结果，与几种最先进的方法相比，提出的IPBTL-RDHEI方法具有更高的嵌入率，并且性能优于竞争对手。 由于IPBTL-RDHEI具有可逆性，因此可以无损且独立地恢复和提取原始明文图像和秘密信息。
@article{wu2019improved,
title={An improved reversible data hiding in encrypted images using parametric binary tree labeling},
author={Wu, Youqing and Xiang, Youzhi and Guo, Yutang and Tang, Jin and Yin, Zhaoxia},
journal={IEEE Transactions on Multimedia},
year={2019},
publisher={IEEE}
}