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 wavelet contrast is presented.

• 为了提供较大的秘密信息嵌入量和保持较好的载密图像质量,提出了一种基于自组织特征映射神经网络和小波对比度的图像密写。