Image Steganography Based on Quantization-Embedders Combination

Quantization-embedder (QE) is the basic embedding manner, which is composed of partition function, quantization function, conversion function and encoding function. For achieving statistical security, a steganographcial method based on combination of QEs is proposed to preserve the distribution of stego signal toward that of cover signal, and a practical algorithm is implemented in prediction-error domain. Experimental results show that the proposed method has high preservation ability to keep statistical security.