一种基于分块的二值图像信息隐藏算法

提出了一种新颖的基于分块的二值图像信息隐藏算法，算法首先计算出原始图像中每个像素的可修改度，并通过置乱来均衡可修改像素在图像中的分布；将置乱后的二值图像分块，提取每块图像的特征值，组成二值的特征矩阵，对特征矩阵再进行分块，根据特征矩阵块进行信息嵌入，若要嵌入的信息与特征矩阵块中的某一特征值不相匹配时，则通过翻转与该特征值对应的图像块中最适合修改的一个像素来实现对此特征值的间接修改，实验结果表明，该隐藏算法信息嵌入量适中，隐藏信息的图像具有良好的视觉透明性，系统的安全性也较高。

Data hiding algorithm for binary images based on image partition

A new data hiding algorithm for binary images based on image partition is proposed. The flippability of each pixel is computed through a rule. Shuffling is applied in order to average the spatial distribution of pixels that are suitable for flipping. The shuffled image is then divided into blocks and feature value extracted from each block is organized into a binary matrix. The binary matrix is again divided into blocks, according to which the secret message is embedded. Whenever some feature value needs to be modified, the algorithm can find the most suitable pixel in the corresponding image block and flip it. The experiments prove that the algorithm can embed moderate amount of secret message, the perceptual transparence is good, and the security is satisfactory as well.