Review of the Reversible Data Hiding in Encrypted Image
摘要
This article reviews recent advancements in Reversible Data Hiding in Encrypted Image (RDHEI), a technique that embeds auxiliary data in encrypted images while preserving the original image's integrity. Recent innovations aim to maximize embedding capacity and minimize image distortion by utilizing redundant space in encrypted images. These methods are classified into Reserving Room Before Encryption (RRBE) and Vacating Room After Encryption (VRAE). The paper examines techniques such as Redundant Space Transfer, Adaptive Coding, Pixel Difference Encoding, Exact Extraction, and Run-length Encoding, comparing their performance. RDHEI shows promise for privacy protection, secure communication, and data management, with future research focusing on enhancing embedding capacity, algorithmic efficiency, and exploring new applications.