摘要目前，由于大气的散射与吸收是不可避免的，所以消除大气对遥感信号的影响是获得真实准确信息至关重要的一步。原始图像包括地表，大气和太阳的信息，如果想要了解某一物体表面的光谱信息，就必须将它的反射得到的信息从大气和太阳中分离出来。国内外提出的大气校正方法有黑暗像元法、线性回归法、辐射传输模型、直方图匹配法等等[1]。,本文是使用ENVI5。1软件中的大气校正模块，对研究区——徐州地区Landsat5遥感图像进行辐射定标，采用多种大气校正方法对遥感图像进行大气校正，根据比较水体、植被校正前后的光谱曲线图和植被指数（Normalized Difference Vegetation Index，NDVI）的结果图像并结合研究区的密度分割图，总结得到适合的大气校正方法，改善研究区遥感图像质量,提取到真实有效的地表信息，为更好地发展徐州尽一份自己的贡献。遥感技术获取的信息大，范围广，节省人力、物力、时间和干扰因素等，已经成为科学研究的重要手段。80672

毕业论文关键词：大气校正、陆地卫星、归一化植被指数，可见光-近红外遥感

Abstract At present, due to the scattering and absorption of the atmosphere is inevitable, so the elimination of the impact of the atmosphere on the remote sensing signal is a crucial step to obtain true and accurate information。 The original image including surface, atmospheric and solar information, if you want to understand the spectral information of an object surface, it must be separated from the reflection information of its atmospheric and solar information[9]。 The atmospheric correction method with dark pixel method, linear regression method, radiative transfer model, histogram matching method [2]。 in this paper, is the correction module of ENVI5。1 software used in the study area, the atmospheric Landsat5 remote sensing images of Xuzhou area using a variety of radiometric calibration, atmospheric correction method of atmospheric correction of remote sensing image, according to the comparison of water, vegetation before and after correction of spectral curve and vegetation index (Normalized Difference Vegetation Index, NDVI) the result of image combined with the features of the study area, are summarized for atmospheric correction methods, improve the image quality of the study area, to effectively extract true Information for the better development of Xuzhou to make their own contribution。 Remote sensing technology to obtain the information, a wide range, saving manpower, material resources, time and interference factors, etc。, has become an important means of scientific research。

Key words：Atmospheric Correction，Landsat，NDVI，Vis-NIR Remote Sensing

目   录

摘   要 I

Abstract II

1  概述 1

1。1  研究的目的和意义 1

1。2  国内外研究现状 1

1。3  论文的组织结构 2

2  遥感图像大气校正的基本理论与方法 3

2。1  光学遥感成像原理 3

2。2  大气对遥感的影响 3

2。3  大气校正的常用方法 5

3  研究区与数据源 7

3。1  研究区概况 7

3。2  卫星遥感数据源 7

4  数据处理与结果分析