A multi-level additive distortion method for security improvement in palette image steganography

Yi Chen, Hongxia Wang, Yunhe Cui, Guowei Shen, Chun Guo, Yong Liu, Hanzhou Wu

Abstract: Highlights•A index-level cost and pixel-level cost based additive distortion method is proposed.•Designing the distortion function for palette image steganography improves security.•Our proposed method can be implemented in multi- and single-frame palette images.