Reversible Data Hiding in Encrypted Images Based on Reserving Room After Encryption and Multiple Predictors
Reversible Data Hiding in Encrypted Images Based on Reserving Room After Encryption and Multiple Predictors
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DOI：
10.1109/icassp.2018.8461362
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发表时间：
2018-04
期刊：
影响因子：
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通讯作者：
Ioan-Catalin Dragoi;D. Coltuc
中科院分区：
文献类型：
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作者：
Ioan-Catalin Dragoi;D. Coltuc
提出了一种新的加密后腾出空间的可逆数据隐藏方案。通过位翻转随机形成的像素组的预选位平面，将隐藏数据嵌入到加密的主图像中。本文的主要新奇是使用多个预测在一个自适应的过程中检测原始和修改后的像素。四个预测器用于四个邻居的上下文中，即四个像素的平均值，基于局部梯度的加权平均值，中值和中点。提供了实验结果。与现有的先加密后保留空间的方案相比，该方案在保证较高的嵌入比特率的同时，降低了失真。
This paper proposes a new vacating room after encryption reversible data hiding scheme. Hidden data is embedded into the encrypted host image by bit-flipping a preselected bitplane of a randomly formed pixel group. The major novelty of the paper is the use of multiple predictors in an adaptive procedure for detecting between original and modified pixels. Four predictors are used on a context of four neighbors, namely the average of the four pixels, a weighted average based on local gradients, the median and the midpoint. Experimental results are provided. Compared with the state-of-the-art reserving room after encryption schemes, the proposed approach provides higher embedding bit-rates at lower distortion.