High-capacity reversible data hiding in encrypted images by prediction error
High-capacity reversible data hiding in encrypted images by prediction error
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DOI：
10.1016/j.sigpro.2014.04.032
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发表时间：
2014-11
期刊：
影响因子：
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通讯作者：
Xiaotian Wu;Wei Sun
中科院分区：
文献类型：
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作者：
Xiaotian Wu;Wei Sun
近年来，加密图像信号处理因其隐私保护特性而受到学术界的广泛关注。加密图像中的可逆数据隐藏是一种在不访问原始图像内容的情况下将附加数据嵌入到加密图像中的技术，嵌入的数据可以被提取，并且可以将加密图像恢复为原始图像。本文提出了两种采用预测误差的可逆加密图像数据隐藏方法，即联合方法和可分离方法。在联合方法中，数据提取和图像重建同时进行。可逆性、错误提取位数显着提高，同时保持恢复图像的良好视觉质量，特别是当嵌入率较高时。在可分离方法中，数据提取和图像恢复是分开的。可分离方法还为高负载嵌入提供了改进的可逆性和恢复图像的良好视觉质量。
In recent years, signal processing in encrypted images received much attention from academia due to the privacy preserving property. Reversible data hiding in encrypted images is a technique that embedded additional data into an encrypted image without accessing the content of the original image, the embedded data can be extracted and the encrypted image can be recovered to the original one. In this paper, two reversible data hiding methods in encrypted images, namely a joint method and a separable method, are introduced by adopting prediction error. In the joint method, data extraction and image reconstruction are performed at the same time. The reversibility, number of incorrect extracted bits are significantly improved while maintaining good visual quality of recovered image, especially when embedding rate is high. In the separable method, data extraction and image recovery are separated. The separable method also provides improved reversibility and good visual quality of recovered image for high payload embedding.