| GF-2影像中不同水体指数模型提取精度及稳定性分析 |
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| 引用本文： | 刘双童,王明孝,杨树文,杨明泽,杨立华.GF-2影像中不同水体指数模型提取精度及稳定性分析[J].测绘通报,2019,0(8):135-139. |
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| 作者姓名： | 刘双童 王明孝 杨树文 杨明泽 杨立华 |
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| 作者单位： | 兰州交通大学测绘与地理信息学院,甘肃兰州730070;甘肃省地理国情监测工程实验室,甘肃兰州730070;兰州精准地形沙盘模型智能制造有限公司,甘肃兰州730020;68029部队博士后科研工作站,甘肃兰州,730020;兰州交通大学测绘与地理信息学院,甘肃兰州730070;甘肃省地理国情监测工程实验室,甘肃兰州730070;兰州精准地形沙盘模型智能制造有限公司,甘肃兰州,730020 |
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| 基金项目： | 国家重点研发计划（2017YFB0504201）；国家自然科学基金（41761082） |
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| 摘 要： | 针对GF-2卫星影像数据的特点，选取了临夏回族自治州境内两个不同研究区域，分别采用单波段阈值法、归一化差分植被指数法（NDVI）及其他3种水体提取指数法（NDWI、SWI、MSWI）对两个研究区进行水体提取试验。通过分析比较各水体指数模型中阈值对水体提取精度和稳定性的影响，发现研究区1（城区）中单波段阈值法提取效果最高达到71.29，且稳定性较好。研究区2（山区）中MSWI方法提取精度最高为95.76，稳定性较单波段法次之。本文试验为GF-2影像在不同区域进行水体提取时选择不同模型及阈值时提供可靠的参考依据。
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| 关 键 词： | GF-2卫星 水体提取 阈值 稳定性 |
| 收稿时间： | 2018-11-19 |
| 修稿时间： | 2019-01-21 |
Extraction accuracy and stability analysis of different water body index models in GF-2 images |
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| LIU Shuangtong,WANG Mingxiao,YANG Shuwen,YANG Mingze,YANG Lihua.Extraction accuracy and stability analysis of different water body index models in GF-2 images[J].Bulletin of Surveying and Mapping,2019,0(8):135-139. |
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| Authors: | LIU Shuangtong WANG Mingxiao YANG Shuwen YANG Mingze YANG Lihua |
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| Institution: | 1. Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China;2. Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Gansu Province, Lanzhou 730070, China;3. Lanzhou Precision Sand Table Model Intelligent Manufacturing Co., Ltd., Lanzhou 730020, China;4. Post-Doctor Research Center of 68029 Troops, Lanzhou 730020, China |
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| Abstract: | According to the characteristics of GF-2 satellite image data, two different research areas in Linxia Hui Autonomous Prefecture are selected, and uses single-band threshold method, normalized difference vegetation index method (NDVI) and three other water body extraction index methods (NDWI, SWI, MSWI) water body extraction test in two study areas. the effects of threshold values on the accuracy and stability of water extraction in each water body index model are analyzed and compared. It is found that the single-band threshold method in the study area 1 (urban area) has the highest extraction effect of 71.29%, and the stability is good. The extraction accuracy of the MSWI method in the second (mountain) of the study area is up to 95.76%, and the stability is second to that of the single-band method. This experiment provides a reliable reference for GF-2 images when selecting different models and thresholds for water extraction in different regions. |
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| Keywords: | GF-2 satellite water body extraction threshold stability |
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