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遥感技术与应用  2013, Vol. 28 Issue (4): 610-617    DOI: 10.11873/j.issn.1004-0323.2013.4.610
图像与数据处理     
面向亚像元级积雪信息提取的MODIS影像波段融合方法研究
张宁丽1,2,范湘涛1,朱俊杰1
(1.中国科学院遥感与数字地球研究所,北京 100094;2.中国科学院大学,北京 100049)
A Study on MODIS Image Fusion Methods for Sub-pixel Snow Extraction
Zhang Ningli1,2,Fan Xiangtao1,Zhu Junjie1
(1.Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing 100094,China;
2.University of Chinese Academy of Sciences,Beijing 100049,China)
 全文: PDF(1848 KB)  
摘要:

MODIS影像因其共享性和时间序列的完整性而成为大区域积雪监测研究广泛使用的数据源,进行MODIS影像波段间融合,能够为积雪研究提供较高分辨率的影像数据源。为了充分利用MODIS影像250 m分辨率波段的空间和光谱信息,提取亚像元级的积雪面积,使用两种具有高光谱保真度的影像融合方法:基于SFIM变换和基于小波变换的融合方法,采取不同的波段组合策略,对MODIS影像bands 1~2和bands 3~7进行融合,并以Landsat TM影像的积雪分类图作为“真值”,对融合后影像进行混合像元分解得到的积雪丰度图的精度进行评价。结果表明:利用基于SFIM变换和小波变换方法融合后影像提取的积雪分类图精度较高,数量精度为75%,比未融合影像积雪分类图的精度提高了6%,表明MODIS影像波段融合是一种提取高精度积雪信息的有效方法。

关键词: MODIS影像融合积雪混合像元    
Abstract:

Because of its sharing and high time resolution,MODIS image has became the widely used data source in large area snow monitoring research.Fusion between MODIS image bands can provide a higher resolution image data source for snow study.In order to utilize the spatial and spectral information of MODIS 250m bands data effectively,this paper takes band 1 and/ or band 2 as the high resolution images and uses the remote sensing image fusion methods SFIM and wavelet transform to fuse bands 3~7.The fused image was input into the line spectral mixture model to extract snow area at sub-pixel scale.In addition,the accuracy of the extracted snow area was assessed by the Landsat TM snow maps,which was used as the “truth value”.The results show that the quantity accuracy of snow cover area gotten form fused image is 75% ,increased by 6% than that of generated form unfused image and band fuse of MODIS images is an effective way to extract high accuracy snow information.

Key words: MODIS    Image fuse    Snow cover    Mixture pixel
收稿日期: 2012-05-22 出版日期: 2013-08-14
:  TP 75  
基金资助:

国家973项目(2010CB951403)。

通讯作者: 范湘涛(1968-),男,湖南隆回人,研究员,主要从事数字地球基础理论与技术等方面的研究。E-mail:xtfan@ceode.ac.cn。    
作者简介: 张宁丽(1987-),女,陕西岐山人,硕士研究生,主要从事遥感信息提取与多学科综合应用方面的研究。E-mail:znl8311240@163.com。
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引用本文:

张宁丽,范湘涛,朱俊杰. 面向亚像元级积雪信息提取的MODIS影像波段融合方法研究[J]. 遥感技术与应用, 2013, 28(4): 610-617.

Zhang Ningli,Fan Xiangtao,Zhu Junjie. A Study on MODIS Image Fusion Methods for Sub-pixel Snow Extraction. Remote Sensing Technology and Application, 2013, 28(4): 610-617.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2013.4.610        http://www.rsta.ac.cn/CN/Y2013/V28/I4/610

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