一种基于小波的盲提取信息隐藏

提出了一种基于小波的盲提取信息隐藏算法。将载体进行小波分解，根据低频区域小波系数的重要比特位选择中频区域隐秘信息的嵌入位置。再将经过了预处理的隐秘信息映射到已确定的嵌入位置，最终通过小波反变换生成含有隐秘信息的伪对象。提取则是嵌入的反过程。试验表明此方法的隐藏效果较好，伪对象与原始载体的区别不易被人眼察觉。提取时不需要原始载体，具有一定的抗攻击性。

A Blind Data Hiding Algorithm Based on Wavelet Transform

This paper proposes a data hiding method for digital information with the spatial frequency features of wavelet transform.According to the important bits of the low frequency coefficients,it chooses the positions in the blocks,which are divided from the middle frequency coefficients.Then,it sets the secret information,which is modulated before,in these positions.Finally,it can gain the pretend object,which contain the secret information,by IDWT transform.The picking up secret information method is the reverse hiding method.The experimentation result indicated that this method was good for hiding data,and it's difficult for eyes to distinguish whether or not these contained the secret.It needn't the original carrier object for picking up secret and has better robustness against general operation of digital information.