Remote Sensing Technology and Application, Volume. 39, Issue 5, 1271(2024)
Extraction of Typical Vegetation Communities in Poyang Lake Wetland based on Time Series Sentinel-2 Images
Figures & Tables(10)
Fig. 3. Time series curve diagram of wetland information in protected areas
Fig. 5. Feature box plot based on statistical-temporal feature set
Fig. 7. Information area and proportion of wetlands in protected areas
Table 1.
Sentinel-2 spectral index description View tableView in ArticleTable 1.
Sentinel-2 spectral index description ID 特征 缩写 特征描述 1~136 光谱波段 B B2,B3,B4,B5,B6,B7,B8,B8A 137~153 传统光谱指数 NDVI NDVI=(B8-B4)/(B8+B4) 154~170 NDWI NDWI=(B3-B8)/(B3+B8) 171~187 SAVI SAVI=1.5×(B8-B4)/(B8+B4+0.5) 188~204 DVI DVI=B8-B4 205~221 RVI RVI=B8/B4 222~238 MASVI MASVI= 239~255 红边光谱指数 NDVIre1 NDVIre1=(B8-B5)/(B8+B5) 256~272 MTCI MTCI=(B6-B5)/(B5-B4) 273~289 MCARI2 MCARI2=((B6-B5)-0.2×(B6-B3))×(B6/B5) 290~306 IRECI IRECI=(B7-B4)/(B5/B6)
Table 2.
Feature selection View tableView in ArticleTable 2.
Feature selection 特征类型 名称 描述 特征提取 统计特征 Min 时间序列最小值 ee.Reducer.min() Max 时间序列最大值 ee.Reducer.max() StdDev 时间序的标准差 ee.Reducer.StdDev() median 时间序列的中值 ee.Reducer.median() 时间特征 Percentile10 时间序列在10%四分位数处的值 ee.Reducer.percentile([ 10 ,25 ,50,75,90])Percentile25 时间序列在25%四分位数处的值 Percentile50 时间序列在50%四分位数处的值 Percentile75 时间序列在75%四分位数处的值 Percentile90 时间序列在90%四分位数处的值 MeanInterval(0,10) 时间序列的平均值从0%到10% ee.Reducer.intervalMean(0,10) MeanInterval(10,25) 时间序列的平均值从10%到25% ee.Reducer.intervalMean(10,25) MeanInterval(25,50) 时间序列的平均值从25%到50% ee.Reducer.intervalMean(25,50) MeanInterval(50,75) 时间序列的平均值从50%到75% ee.Reducer.intervalMean(50,75) MeanInterval(75,90) 时间序列的平均值从75%到90% ee.Reducer.intervalMean(75,90) MeanInterval(90,100) 时间序列平均值从90%到100% ee.Reducer.intervalMean(90,100) MeanInterval(10,90) 时间序列的平均值从10%到90% ee.Reducer.intervalMean(10,90) MeanInterval(25,75) 时间序列的平均值从25%到75% ee.Reducer.intervalMean(25,75)
Table 3.
Classification result accuracy evaluation View tableView in ArticleTable 3.
Classification result accuracy evaluation 类别 菰 芦苇-南荻 水体 苔草-鶜草 滩涂 菰 77 6 0 7 0 芦苇-南荻 2 83 0 10 0 水体 3 0 103 0 11 苔草-鶜草 9 13 0 96 0 滩涂 0 0 7 0 66 PA(%) 85.56 87.37 88.03 81.36 90.41 UA(%) 84.62 81.37 93.64 84.96 85.71 Kappa:0.83 OA:86.21%
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Bin LI, Ai Zhu ZHANG, Gen Yun SUN, Zhao Jie PAN, Yang FU. Extraction of Typical Vegetation Communities in Poyang Lake Wetland based on Time Series Sentinel-2 Images[J]. Remote Sensing Technology and Application, 2024, 39(5): 1271
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Received: Jul. 11, 2022
Accepted: --
Published Online: Jan. 7, 2025
The Author Email: SUN Gen Yun (genyunsun@163.com)
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