基于混沌和斜变换的卫星图像抗压缩隐藏传输  

Data hiding transmission method against compression for satellite image based on chaos and slant transform

作　　者：李晓博[1] 周诠[1] 

机构地区：[1]中国空间技术研究院西安分院空间微波技术重点实验室,陕西西安710100

出　　处：《计算机工程与设计》2013年第7期2301-2305,共5页Computer Engineering and Design

基　　金：国家重点实验室基金项目(9140C5303020601;9140C5305020706)

摘　　要：针对星上一些重要图像数据的传输问题,提出了一种基于混沌序列和斜变换的大容量卫星遥感图像抗压缩隐藏传输方法。通过利用混沌序列随机选取原始高分辨率遥感载体图像块,并对其进行斜变换后在斜变换域中高频系数中嵌入秘密图像的斜变换系数,对选取的载体图像块进行逆斜变换得到含密载体图像。含密载体图像在经过卫星数传系统有损数据压缩后下传,地面接收端可以从解压后的含密载体图像中正确提取秘密图像。实验结果表明,提出的隐藏算法可抵抗星上JPEG2000有损压缩,并在保证良好的不可见性的情况下获得了较高的嵌入容量,可应用于卫星数据传输。A data hiding transmission method against compression for satellite remote sen-sing image based on chaos sequence and slant transform is proposed for secret satellite remote sensing image transmission on board. High-resolution satellite remote sensing image blocks is selected by utilizing chaos sequence, and slant transform frequency coefficients of secret image is embedded in slant transform domain of relevant sub-blocks of the host image by modifying the slant transform middle and high frequency coefficients. Finally, stego-image is obtained by utilizing inverse slant transform with selected image blocks. The stego-image has gone through lossy compression on board is transmitted to earth station by satellite data transmission system, and the hidden data are extracted correctly at terrestrial station. Our experimental results show that the proposed scheme can achieve high performances in visual quality of stego-images, data embedding capacity, and stand against JPEG2000 lossy compression effectively. It is expected that the proposed scheme having these properties is deployed for satellite data transmission.

关 键 词：卫星数据传输 信息隐藏 混沌序列 斜变换 JPEG2000压缩 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]