Reversible data hiding based on multilevel histogram modification and pixel value grouping

摘要: Pixel value grouping helps to improve efficiency in exploiting block redundancy.Only the maximum and minimum of a can be chosen as to-be-shifted.Not only reference pixel but also results preserve after embedding. This paper proposes multilevel histogram modification based reversible data hiding scheme using new difference generation strategy called (PVG). It aims produce shaper by high correlation among pixels within block. After sorting, values are grouped according their distribution. For each set similar values, real or virtual will determined compute differences scope group next secret message is embedded through expansion By PVG, we success greatly reduce number to-be-shifted while producing sufficient EC hence less distortion introduced for embedding same payload. Moreover, achieved at decoder without any prior knowledge, which guarantees reversibility. Experimental demonstrate that our outperforms previous related state-of-the-art schemes.