一种大容量的二值图像信息隐藏算法

High Capacity Information Hiding Algorithm in a Binary Host Image

针对二值图像取值形式为二值和信息隐藏量少的特点,提出一种在能在各种二值图像中进行大容量信息隐藏的方法.该方法将二值图像分割成大小为2×2的图像块,再根据每个块黑白像素的个数的不同,自适应地确定可嵌入隐藏信息的比特数,以尽量减少对载体图像的修改痕迹,隐藏信息的提取不需原始载体图像及其它辅助信息,是一种完全的盲提取.实验表明该算法在不明显引入修改痕迹的情况下,可显著提高信息隐藏量,比常用的二值图像信息隐藏算法的隐藏容量大一倍以上.

Based on the characteristics of binary image whose value is 0 or 1 and in which just less information can be hidden, A large capacity hiding information scheme is proposed. In this scheme we divides the binary image into blocks of size 2 × 2, and then determine adaptively the bit number which can be embedded in it in order to reduce the negative impact to it according to the difference of black pixel number and white pixel number. Extracting hidden information is absolutely blind Extracting without the original host image and other information. Experiment demonstrates that this scheme sufficiently increases hidden information capacity more than percent 100 compared with the general hiding information algorithm.