A Novel Scheme for Text Information Hiding into a Carrier Image Based on BCH Code and HVS Model

摘要

The issue of security becomes more and more important in the process of information transmission. The paper proposes a novel transmission scheme for text information by hiding it into a carrier image. Firstly, we use ASCⅡ codes to represent the text information and encode these information codes by BCH code before transmitting them. Secondly, we divide the carrier image into 8×8 blocks and transform every block by two-dimensional DCT, calculate JND value of every DCT coefficient and choose the hiding coefficients. Finally, we hide the information codes into the selected coefficients in DCT domain. The process of extracting information codes is the inverse. We do many experiments to prove our scheme to be secure and easy to operate.