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首页> 外文期刊>Journal of visual communication & image representation >Privacy-preserving reversible data hiding based on quad-tree block encoding and integer wavelet transform
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Privacy-preserving reversible data hiding based on quad-tree block encoding and integer wavelet transform

机译：基于四树块编码和整数小波变换的隐私保留可逆数据

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摘要

Applications on the cloud server have matured, and protecting the privacy of the content owner has attracted more attention. Privacy-Preserving Reversible data hiding (PP-RDH) is an efficient technique for embedding additional data into an encrypted image. In this paper, we propose a privacy-preserving reversible data hiding scheme using the quad-tree partition and Integer Wavelet Transform (IWT) techniques. Our scheme focuses on improving the embedding rate and quality of the recovered image when a 2 x 2-sized, block-based image encryption method is applied to ensure relative higher security. On this basis, the IWT technique transforms the encrypted image, and coefficients in three high frequency subbands are converted into 8-bit binary system. Then, the quad-tree partition technique encodes each 8 x 8-sized coefficient block, since there are many zeroes in the front bit planes. The experimental results indicated that our proposed scheme significantly improved the embedding rate, and guaranteed lossless image recovery and data extraction.
机译：云服务器上的应用程序已经成熟，并保护内容所有者的隐私引起了更多的关注。保留隐私可逆数据隐藏（PP-RDH）是将附加数据嵌入到加密图像中的有效技术。在本文中，我们提出了一种使用四边形分区和整数小波变换（IWT）技术的隐私保留可逆数据隐藏方案。我们的计划专注于提高恢复图像的嵌入率和质量，当应用了2×2大小的基于块的图像加密方法以确保相对更高的安全性。在此基础上，IWT技术将加密图像转换，三个高频子带中的系数被转换为8位二进制系统。然后，四边形分区技术编码每个8×8大小的系数块，因为前位平面中有许多零。实验结果表明，我们的建议方案显着提高了嵌入率，保证了无损图像恢复和数据提取。

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