【作者】 李莉莉；

【导师】 白桂欣；

【作者基本信息】 大连海事大学 ， 电子科学与技术， 2010， 硕士

【摘要】 星载微波辐射计在海洋、大气等遥感探测方面具有重要作用,由于受到天线尺寸和重量的限制,星载微波辐射计的空间分辨率通常都比较低,限制了它的应用,因此出于应用的目的,利用微波辐射计空间分辨率增强算法来得到较高分辨率的图像很有必要。本文首先介绍了微波辐射计的应用及国内外的发展过程,通过学习微波辐射计在各个领域的应用,发现微波遥感技术在现今社会中是一项不可缺少的重要手段,但也发现了很多不足,如空间分辨率低的问题。本文主要是围绕这一问题展开的。在了解了微波辐射计的基础上介绍了两种增强微波辐射计空间分辨率的算法：图像反卷积算法和BG反演算法。其中着重介绍了BG反演算法,也是本课题的重点。由于缺少星载微波辐射图像的资料,因此可以模拟生成一个微波辐射图像,用天线方向图函数对模拟图像进行取样,得到一个模糊的取样图像,再利用BG算法对该取样图像进行增强处理,并对增强前后进行了比较,结果表明该算法能增强微波辐射计的空间分辨率。本文还对BG算法做了进一步的拓展研究,即把BG算法扩展到极化效应中,在水平极化和垂直极化的基础上对该算法进行了简单的介绍。论文还对系统指标：测温灵敏度和系统线性度进行了简单的描述,以及在实验室充足的条件下怎样进行指标的验证。最后,对本论文的研究工作加以总结概括,本论文的研究工作为下一步利用该算法进行微波辐射遥感图像处理,并进一步在该算法基础上扩展微波遥感图像处理功能打下了基础。更多还原

【Abstract】 Spaceborne microwave radiometer in the ocean and atmosphere remote sensing has an important role, due to antenna size and weight restrictions, spaceborne microwave radiometer spatial resolution is always lower than limit its application, the application for The purpose of the use of microwave radiometer spatial resolution enhancement algorithm to obtain higher resolution images necessary.This thesis describes the application of microwave radiometer and development at home and abroad, through the study of microwave radiometer applications in various fields, we found that microwave remote sensing technology is an indispensable tool in today’s society, also found many deficiencies, such as the problem of low spatial resolution. This article is carried out around this issue. To understand the basis of the microwave radiometer introduced two microwave radiometer spatial resolution enhancement algorithm:Image Deconvolution Algorithm and the BG Inversion Algorithm. Which focuses on the BG inversion algorithm, is also the focus of this issue. Spaceborne microwave radiation due to the lack of information images, so you can generate a simulated image of microwave radiation with antenna function for sampling the analog image to get a blurred image sampling, re-use of the BG algorithm for image enhancement processing samples, and were compared before and after on the increase, the results show that the algorithm can enhance the spatial resolution of microwave radiometers. This article also made a BG algorithm more extensive study, that the BG algorithm is extended to the polarization effect in water, in horizontal polarization and vertical polarization on the basis of the algorithm is a simple introduction. Thesis on system indicators:temperature sensitivity and linearity of the system was verified.Finally, the research work of this paper to summarize summary of the research work in this thesis using the algorithm for the next microwave remote sensing image processing, and further expansion in the algorithm based on microwave remote sensing image processing foundation.更多还原