title: Separable and error-free reversible data hiding in encrypted image with high payload.
abstract: This paper proposes a separable reversible data-hiding scheme in encrypted image which offers high payload and error-free data extraction. The cover image is partitioned into nonoverlapping blocks and multigranularity encryption is applied to obtain the encrypted image. The data hider preprocesses the encrypted image and randomly selects two basic pixels in each block to estimate the block smoothness and indicate peak points. Additional data are embedded into blocks in the sorted order of block smoothness by using local histogram shifting under the guidance of the peak points. At the receiver side, image decryption and data extraction are separable and can be free to choose. Compared to previous approaches, the proposed method is simpler in calculation while offering better performance: larger payload, better embedding quality, and error-free data extraction, as well as image recovery.
authors: Key Laboratory of Intelligent Computing & Signal Processing, Ministry of Education, Anhui University, No. 111 Jiulong Road, Hefei 230601, China.
authors: Zhaoxia
authors: Z
authors: Yin
authors: Key Laboratory of Intelligent Computing & Signal Processing, Ministry of Education, Anhui University, No. 111 Jiulong Road, Hefei 230601, China.
authors: Bin
authors: B
authors: Luo
authors: Department of Information Management, Yu Da University, No. 168 Hsueh-fu Road, Tanwen Village, Zaoqiao Township, Miaoli County 36143, Taiwan.
authors: Wien
authors: W
authors: Hong
mesh_terms: D000465:Algorithms; D016494:Computer Security; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D012815:Signal Processing, Computer-Assisted