基于遥感影像特征的自适应二维信息隐藏盲算法

An Adaptive Blind Algorithm for 2-Dimension Secrete Information Hiding Based on Feature of Remote Sensing Image

为实现遥感影像中机密信息的隐藏,该文提出了一种自适应于遥感影像特征的机密信息隐藏算法。该算法首先对遥感影像中的机密信息进行分割和提取,然后对遥感影像中提取机密信息后的空白影像块进行灰度补值,制造抹去机密信息后的伪遥感影像;然后借鉴数字水印的思想,利用HVS特性,将机密影像块以不可见的方式自适应地嵌入到伪遥感影像中,从而生成隐藏了机密信息的伪遥感影像;并且该算法在提取机密信息和恢复遥感影像时,不需要原始遥感影像,是一种盲算法。对于信息隐藏算法,不可见性和信息隐藏量是最重要的,而鲁棒性则在其次。实验结果表明:该算法不仅具有较强的透明性和较大的信息隐藏量,而且对于JPEG有损压缩、中值滤波、附加噪声、伸缩、裁剪和旋转等各种影像处理攻击均具有较强的鲁棒性。此外,该算法对隐藏了机密信息后的伪遥感影像的各种应用,如边缘检测和影像分类等均没有影响。

In order to hide se cr ete information in remote sensing image,this paper proposes an algorithm for se crete information hiding which is adaptive to the feature of remote sensing imag e.Firstly,the paper segments and extracts the secrete information in remote se nsing image,and makes supplement of gray values in the area corresponding with the secrete information and then produces the disguised remote sensing image wh ich is wiped off secrete information.Then the paper uses for reference the idea of digital watermarks and feature of HVS(Human Visual System)and embeds the s ecrete sub -image imperceptibly and adaptively into the disguised remote sensin g image to produce the disguised remote sensing image in which there hides secre te sub -image.In addition,during the course of extracting secrete information and resuming the remote sensing image,this algorithm dosen't need the original remote sensing image and is a blind one.To those algorithms for information h iding,imperceptivity and amount of hidden information are the most important and robustness is less.And experimental results show that this algorithm is not only quite transparent and has a good effect for large amount of secrete info rmation hiding,but also has a strong robustness against such image attacks as JPEG lossy compression,median filtering,noise adding,scaling,cropping and ro tation.Furthermore this algorithm has no influence on such applications as edge detection and image classification of the disguised remote sensing image which has hidden the secrete information.