Reversible Data Hiding in Encrypted AMBTC Compressed Images
Signal processing in encrypted domain has attracted high attention during the needs of content security and privacy protection. Reversible data hiding in encrypted images (RDH-EI) also becomes a hot topic. However, most of the published techniques are designed for uncompressed images rather than JPEG-, VQ- and BTC-compressed images. In this paper, for the first time, a RDH-EI method for AMBTC images is proposed. In this method, the higher mean and lower mean of a triple in AMBTC compressed image is encrypted by using stream cipher with the same random bits. Therefore, the spatial correlation of a nature image is preserved and redundant space can be exploited by using the histogram of prediction error. Experimental results demonstrate that the proposed method can embed considerable bits while leave little distortion.
KeywordsSignal processing in encrypted domain Privacy protection Block Truncation Coding Reversible Data Hiding in Encrypted Images
This research work is partly supported by National Natural Science Foundation of China (61502009, 61525203, 61472235), China Postdoctoral Science Foundation (2016M591650), “Shu Guang” project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation, Anhui Provincial Natural Science Foundation (1508085SQF216), Key Program for Excellent Young Talents in Colleges and Universities of Anhui Province (gxyqZD2016011), Quality Engineering Program for Colleges and Universities in Anhui Province (2015jyxm042) and Undergraduates Training Foundation of Anhui University (J10118511269).
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