关键词: 密写, SOM, HVS

Abstract: To provide larger capacity of the hidden secret data and to maintain a better visual quality of stego-image，a novel steganographic method based on SOM and HVS is presented.The contrast and texture sensitivity were used as feature vector，and by SOM，the pixels were classified into the sensitive class and the less sensitive class.More secret data could be embedded in the pixels of less sensitive class，while less secret data could be embedded in the pixels of sensitive class.From the experimental results，compared with SOC，the proposed method hides much more information and maintains a better visual quality of stego-image.

Key words: steganographic method, Self-Organizing Map（SOM）, Human Visual System（HVS）