Reversible Data Hiding in Encrypted Images Based on Bit-plane Compression of Prediction Error

Abstract

As a technology that can protect the information on the original image of being disclosed and accurately extract the embedded information, the reversible data hiding in encrypted images (RDHEI) has been widely concerned by researchers. One of the current challenges is how to further improve the performance of the RDHEI method. In this paper, a highcapacity RDHEI method based on bit plane compression of prediction error is proposed. Firstly, the image owner calculates the prediction error of the original image, next rearranges and compresses the obtained bit plane of prediction error, so as to reserve the room for embedding information, and then uses the encryption key to encrypt the prediction error after vacating the room. The information hiding device encrypts the additional information by the information hiding key, and embeds additional information into the encrypted image. Finally, the image receiver extracts the additional information and recovers the image according to the acquired key. This paper makes full use of the correlation between neighboring pixels and obtains high capacity. Experimental results show that this method can provide higher embedding capacity than state-of-the-art methods.