| 针对二值图像分块奇偶密写的统计分析 |
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| 引用本文： | 梁光岚,王朔中,张新鹏. 针对二值图像分块奇偶密写的统计分析[J]. 上海大学学报(自然科学版), 2007, 13(3): 221-224 |
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| 作者姓名： | 梁光岚 王朔中 张新鹏 |
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| 作者单位： | 上海大学,通信与信息工程学院,上海,200072;上海大学,通信与信息工程学院,上海,200072;上海大学,通信与信息工程学院,上海,200072 |
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| 摘 要： | 一种实现简单的二值图像密写方法是将图像分为2×2的小块后利用边缘块的奇偶性来隐藏秘密信息.将含密图像以不同行列作边界分块时，图像块像素和的直方图存在明显差异，且非边缘块的数目变化较大.这一异常会暴露秘密信息的存在.通过将含密图像错位分块后作二次密写，并统计不同分块方式下非边缘块数目的变化量，可估计出嵌入量.该方法容易实现，实验验证了该方法的有效性.
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| 关 键 词： | 二值图像密写 密写分析 直方图 |
| 文章编号： | 1007-2861（2007）03-0221-04 |
| 收稿时间： | 2006-09-13 |
| 修稿时间： | 2006-09-13 |
Statistical Analysis of Binary Image against Block Parity Steganography |
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| LIANG Guang-lan,WANG Shuo-zhong,ZHANG Xin-peng. Statistical Analysis of Binary Image against Block Parity Steganography[J]. Journal of Shanghai University(Natural Science), 2007, 13(3): 221-224 |
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| Authors: | LIANG Guang-lan WANG Shuo-zhong ZHANG Xin-peng |
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| Affiliation: | School of Communication and Information Engineering, Shanghai University, Shang hai 200072,China |
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| Abstract: | An effective data hiding method for binary images divides the cover image into 2-by-2 blocks and embeds 1 bit in each edge block by making use of the parity of the block-sum.In this paper a steganalytic scheme is described against this technique.The proposed scheme uses difference between histograms of the block-sum when the block border is changed.By removing the top row and the left-most column to crop the suspected image,a test embedding is performed.This is used for estimating the initial embedding rate.Simulation results show that the proposed method can provide a satisfactory estimate of the embedding capacity. |
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| Keywords: | data hiding steganalysis block histogram |
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