| 利用RADARSAT SWA SAR和LANDSAT TM的互补信息确定洪水水体范围 |
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| 引用本文： | 杨存建,周成虎.利用RADARSAT SWA SAR和LANDSAT TM的互补信息确定洪水水体范围[J].自然灾害学报,2001,10(2):79-83. |
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| 作者姓名： | 杨存建 周成虎 |
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| 作者单位： | 1. 云南大学生态学与地植物学研究所;中国科学院遥感应用研究所再生室
2. 中国科学院 |
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| 基金项目： | 国家自然科学基金和长江水利委员会联合资助项目(50099620)；博士后基金和国土环境遥感时空信息分析与数字地球相关理论技术问题研究资助项目(KZCX-Y-02) |
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| 摘 要： | 从RADARSAT SAR图像中自动提取洪水水体，一直是一个急需解决而又未能得到解决的问题。主要困难是由于阴影与水体严重相混淆。为此，本文研究发现,通过RADARSAT SWA SAR图像和LANDSAT TM图像上的互补信息，利用RADARSAT SWA SAR图像和LANDSAT TM图像上的水体和阴影进行复合处理，可以从RADARSAT SWA SAR图像上准确、半自动提取洪水水体范围。研究结果表明，该方法不仅适用于平地洪水水体范围的半自动提取，而且更适用于包含山区的大范围洪水水体的半自动提取。
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| 关 键 词： | 洪水水体范围 互补信息 RADARSAT SWA SAR图像 半自动提取 阴影 雷达图像 |
| 文章编号： | 1004-4574(2001)02-0079-05 |
| 修稿时间： | 2000年10月9日 |
Application of
complementary information of RADARSAT SWA SAR and LANDSAT TM in deciding the flood extent |
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| YANG Cun-jian,ZHOU Cheng-hu.Application of
complementary information of RADARSAT SWA SAR and LANDSAT TM in deciding the flood extent[J].Journal of Natural Disasters,2001,10(2):79-83. |
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| Authors: | YANG Cun-jian ZHOU Cheng-hu |
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| Abstract: | Extracting the flood extent from RADARSAT SAR data is an important problem urgently needing to be resolved. Up to now, the problem has not been fully resolved. The difficulty of the problem is the confusion between flood water body and mountain shade. A new method by using complementary information to solve it was proposed here. The shade and water body from TM imagery were fused with the water body from RADANSAT SAN with the objects of extracting flood extant from RADARSAT SAR imagery. The flood extent can be accurately and semi-automatically extracted from RADARSAT SAR with the method. It is showed that the method is not only suitable for plain area, but also suitable for mountain area. |
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| Keywords: | flood extent complementary information RADARSAT SAR imagery semi-automatical extraction |
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