Information hiding algorithm for palette images based on HVS

This article is based on Human Visual System (HVS). The carrier image is divided into three regions: the smooth region, the texture region and the fringe region. After the secret image being scrambled, the different merging coefficients are set in the respective region of the carrier image to mix the secret image and the carrier image together. According to the characteristics of the palette image, the scrambling coefficients are embedded into the carrier image palette to increase the confidentiality of the information. During carrier image partitioning, variation coefficient is introduced to describe the data dispersion degree of the image. Thus the stability of the threshold is enhanced, and a much better hiding effect on the secret information is achieved.