Undetectable JPEG Image Batch Reversible Data Hiding with Content-adaptive Payload Allocation

As an efficient way to achieve covert storage in clouds, batch image data hiding attracts increasing attention in recent years. Reversible data hiding which can completely restore the original covers after data extraction brings about novel advantages for JPEG image-based covert storage. However, due to the specific manipulation on DCT coefficients, existing JPEG image reversible data hiding cannot meet the requirement of se-cure covert storage. Therefore, the undetectability of batch JPEG image reversible data hiding deserves investigation. In this paper, we propose an undetectable JPEG image batch reversible data hiding method, in which a content-adaptive payload allocation strategy is designed to enhance the undetectability and guarantee the reversibility. Experimental results show the superiority of this proposed method compared with the state-of-the-art related methods.