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遥感技术与应用
遥感应用     
基于不同地形校正模型的影像反射率对比分析
吕利利1,颉耀文1,2,董龙龙3
1.兰州大学资源环境学院,甘肃 兰州730000;
2.兰州大学西部环境教育部重点实验室,甘肃 兰州730000;
3.北京航天宏图信息技术股份有限公司,北京100195
The Comparison of Reflectance based on Different Terrain Correction
Lü Lili1,Xie Yaowen1,2,Dong Longlong3#br#
(1.The Collage of Earth and Environment,Landzhou University,Lanzhou 730000,China;)
2.Key Laboratory of Western China’s Environmental System(Ministry of Education,Collage of Earth and Environment,Lanzhou 730000,China;
3.Beijing PIESAT Information Technology Co.Ltd.,Beijing 100195,China
 全文: PDF(9859 KB)  
摘要:
以甘肃省兰州市东南部的兴隆山地区为例,使用Landsat 8 OLI遥感影像,对研究区影像的各个波段分别进行余弦校正、C校正和改进型Minnaert校正,通过实地测量和对比影像的统计特征两种方法,对校正结果进行对比分析。结果发现:在可见光和短波红外波段,余弦模型的校正效果比较理想,C模型存在过度校正现象;而在近红外波段,使用C模型能够得到比较好的校正结果,余弦模型的过校正现象严重;从7个波段的整体校正效果来看,改进型Minnaert模型的校正效果较为理想。从校正前后不同地形特征的反射率变化可以看出,几种模型在小坡度的校正效果基本近似;模型的过校正现象主要发生在阴坡地区,而且随着坡度的增加,阴坡的过校正现象更加明显;改进型Minnaert模型的整体过校正现象较少,比较适合在坡度较大、地形较复杂地区的校正。
关键词: 遥感影像地形校正反射率    
Abstract:
Selecting the Xinglong Mountain which locates in the southeast of Lanzhou city,GanSu province as an example.Using the Landsat8 satellite image as the data source,the Cosine method,C and the modified Minnaert methods were used for each band in the study area.Comparing with the results of the field measurement reflectance and the statistical characteristics of image,the result showed that the cosine method has a perfect correction in the visible and short wave infrared wavelength,the C correction has a serious over\|correct,however.In the Near Infrared Wavelength,the better result obtained by C correction,and the cosine method has over\|correct otherwise.Comparing with the correct effect of whole bands,the modified Minnaert method has an ideal correct effect.The comparison of before and after correction we found that there is a smaller difference for three methods in the smaller slope,and the over correct is mostly in the south.What’s more,with the increase of the slope,the over correct is more obviously,but,there is a little over correct which used the modified Minnaert method in the whole area,it’s more suitable in large slope and the complicated area.
Key words: Remote sensing image    Terrain correction    Reflectance
出版日期: 2017-09-13
:  TP 79  
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引用本文:

吕利利,颉耀文,董龙龙. 基于不同地形校正模型的影像反射率对比分析[J]. 遥感技术与应用, 10.11873/j.issn.1004-0323.2017.4.0751.

Lü Lili,Xie Yaowen,Dong Longlong. The Comparison of Reflectance based on Different Terrain Correction. Remote Sensing Technology and Application, 10.11873/j.issn.1004-0323.2017.4.0751.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2017.4.0751        http://www.rsta.ac.cn/CN/Y2017/V32/I4/751

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