Structural Similarity Based Information Hiding

An information hiding algorithm based on the structural similarity is presented. In the proposed algorithm, given an original image, and hidden some information in the original image without taking into account the HVS (Human Visual System), then get a stego image. Two images are divided into some sub-blocks with the same size. Then the structure similarity of the corresponding block is calculated. If the structural similarity is greater than a threshold, the sub-block information from the stego image is extracted, and hidden this information into the corresponding block of original image.