Lingfeng Qu1, Hongjie He1, Shanjun Zhang2, Fan Chen1, *
CMC-Computers, Materials & Continua, Vol.65, No.3, pp. 2623-2638, 2020, DOI:10.32604/cmc.2020.09723
Abstract Reversible data hiding in encrypted images (RDH-EI) technology is widely
used in cloud storage for image privacy protection. In order to improve the embedding
capacity of the RDH-EI algorithm and the security of the encrypted images, we proposed
a reversible data hiding algorithm for encrypted images based on prediction and adaptive
classification scrambling. First, the prediction error image is obtained by a novel
prediction method before encryption. Then, the image pixel values are divided into two
categories by the threshold range, which is selected adaptively according to the image
content. Multiple high-significant bits of pixels within the threshold range are… More >
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