Adaptive Image Steganography by Reversible Data Hiding

摘要

An adaptive steganographic scheme is proposed in this paper. The adaptive quantization embedder is introduced and employed by block-wised fashion.We also constructed contrast-correlation distortion metric to optimally choose quantization steps for image blocks to guarantee more data being embed-ded in busy areas. Different form existing meth-ods, our scheme embeds the AQE parameters to-gether with message bits into the cover image by difference expanding algorithm. Simulation exper-iments show the proposed scheme can provide a good trade-off between the perceptibility and the capacity.