Information Hiding Algorithms Researching Based On Gray Images

As the developing of the informationization in the world, the communication and transfer with the information is more and more frequently. So, how to insure the security of the communication is very important. Now, Encryption is very popular. But wih the enhancing of the computer's capacity, the Encryption is being challenged. People is doubtful of the Encryption. The encrypted information looks like desultorily, and people can not understand directly. It is the distinct clue of the important information and the braker can find that easily and try to decode it. Fortunately, in recent years a new technology was borned. It is named Information Hiding. Using the Encryption, the meaning of the information is hided, and using the Information Hiding, the existing of the information is hided. The secrect information is embedded in a exoteric carrier, the breaker is difficult to find the secrect information, even if the breaker find it, he can not extract the right information easily.The researches of the paper include the pretreatment technology, the human vision system, the image disorder technology and the error correction code. The pretreatment technology can encode the secrect information and also can enhance the robusticity. The paper is study with the algorithms of the gray image, there are base in the space domain and the transfer domain. The transfer algorithms include the DCT method and the DWT method. The space algorithms include the LSB method and the SVM method. The results were given in the paper.