In order to improve the security of steganography system

an image steganography method based on Minimizing Embedding Impact and Syndrome-Trellis Codes is proposed. First

a distortion function in discrete wavelet transform(DWT) domain was designed according to human visual system and integer lifting wavelet transform

which is mainly concerned about the influences of frequency

luminance

and texture masking factor to the cover distortion. Then

the Syndrome-Trellis Codes are combined with the distortion function to propose the steganography method

to make sure that the embedding impact on the cover minimizing and centralizing is in the un-sensitivity domain. Experiments show that the proposed approach maintains a good visual quality of the stego-image and has a high security against steganalysis in space and wavelet domain. The security capacity can be about 0.4 bits/pixel.