信息隐藏系统---将文本隐藏到图片（附任务书）

信息隐藏系统---将文本隐藏到图片 摘要 信息隐藏是一门新兴学科，是各国研究者所关注和研究的热点。其原理是利用载体中存在的冗余信息来隐藏秘密对象，以实现保密通信或者实现数字签名和认证。隐写术是信息隐藏的一个重要分支,时空域的隐写术算法简单 ，应用方便。本论文依据图像的视觉冗余特性研究时域的基于最低有效位的隐写方法。文章首先讨论了图像的置乱变换、差错控制编码等预处理方法，然后说明了早期的图像隐藏方法和BMP图像的格式和隐藏的算法及一些相关的内容.最给出基于最低有效位的隐写方法的算法和流程，并且通过编程实现。最后进一步研究了数据嵌入的位置问题，并讨论了一种能对抗压缩的变换域信息隐藏方法。实验结果表明，该方法简单有效，能对抗被动攻击者，并能够实现无损恢复。 关键词 信息隐藏 隐写术 时域 毕业设计（论文）外文摘要 Title The information conceals the system Text this were concealed the picture inside Abstract It is a newly arisen course that information conceal, is an all countries researcher a concern with the investigative hot point.Its principle is a redundancy information to makes use of to carry to exsits in to conceal the secret object, toing realize to keep secret the correspondence or realize arithmetic figure signature with attestation.The Conceal writes is Conceal that an important branch that the information conceal, the timespace area write the calculate way of simple,application convenience.Area when this thesis study according to the sense of vision redundancy characteristic of the picture of according to the Conceal of the lowest valid writes the method.The article discussed first the picture places the disorderly transformation, amiss control codes etc. prepares to handle method, then explain the picture of the earlier period conceal the method with the picture of BMP format with hidden calculate way and related contents in some.Give most according to lowest valid a calculate way for of Conceal writing method with process, and pass to weave the distance realizes.Further studied the inlaid position in data problem finally, and discussed a kind of resist the compressed transformation area information conceal the method.Experiment the result expresses, combining can realize to have no the instauration of Damage. Keywords: The information conceals The Conceal write The hour area