【摘要】 根据图像的灰度值表示范围,应用位平面分解的方法,将其转化为若干个二值图像,将需要隐藏的图像进行置乱后,用其替换某一个位平面,而隐藏到图像中去.提取时,将该位平面提取出来,并进行逆置乱变换,即可恢复隐藏的二值图像.该算法的特点是隐藏效果好,提取时不需要原始图像.在置乱时,以一维置乱算法为基础,提出了两种新的置乱算法,算法可适应用AM×N(M≠N)数据矩阵.除置乱效果好外,算法安全性也很高.更多还原

【Abstract】 Based on the image’s gray value coverage,this article applies the algorithms of bit plane decomposition to transform it into some two values image.When the image that needs hidden the picture in the same size as the carrier image is hashed,a certain bit plane is taken out and anti-hashed, after which the concealed two values picture can be recovered.The advantage of this method lies in its hidden effects and the original picture can be absent during the process of taking out.In the process of hashing,based on one dimension hashing algorithms,this article puts forward two new hashing methods which can be applied to A_M×N,（M≠N） matrix and whose security is highly guaranteed.更多还原