Journal of Geo-information Science, Volume. 22, Issue 10, 2088(2020)

A Comparative Study on the Classification of GF-1 Remote Sensing Images for Zhoukou Urban under the Four Identical Condition

Jie YE1, Fanxiao MENG1、*, Weiming BAI1, Bin ZHANG1, and Jinming ZHENG2
Author Affiliations
  • 1Henan Aero Geophysical Survey and Remote Sensing Center, Zhengzhou 450053, China
  • 2Northwest Institute of Nuclear Technology, Xi'an 710024, China
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    Figures & Tables(10)
    Fusion remote sensing image of GF-1 satellite for the main districts of Zhoukou acquired on April 17, 2018
    Workflow of object-based classification in the study area
    The distribution of training, verification sample and investigation site
    Comparison of pixel-based and object-based classification under three machine learning classifiers including CART, SVM and RF using GF-1 remote sensing image for classing the main district of Zhoukou urban
    Comparison of producer's accuracy and user's accuracy of pixel-based classification(under three machine learning classifiers including CART, SVM and RF) for Zhoukou urban at class level
    Comparison of producer's accuracy and user's accuracy of object-based classification(under three machine learning classifiers including CART, SVM and RF) for Zhoukou urban at class level
    Comparison of local details of pixel-based and object-based classification for Zhoukou urban under three machine learning classifiers including CART, SVM and RF
    • Table 1. The parameters of GF-1 satellite image

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      Table 1. The parameters of GF-1 satellite image

      参数2 m分辨率全色/8 m分辨率多光谱16 m分辨率多光谱
      光谱范围/μm全色0.45~0.90-
      多光谱0.45~0.520.45~0.52
      0.52~0.590.52~0.59
      0.63~0.690.63~0.69
      0.77~0.890.77~0.89
      空间分辨率/m全色216
      多光谱8
      幅宽/km60(2台相机)800(4台相机)
    • Table 2. Optimal feature set for object-based classifications

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      Table 2. Optimal feature set for object-based classifications

      特征类型特征名称物理意义
      光谱特征Mean RR波段均值
      Ratio RR波段比率
      quantile[50] (R)R波段分位数
      Max.diff.最大差值
      Standard deviation NIRNIR波段标准偏差
      HIS Transformation SaturationHIS空间饱和度
      形状特征AreaShape indexDensityElliptic FitCompactness(polygon)面积
      形状指数
      密度
      椭圆拟合率
      紧致度
      纹理特征GLCM Entropy(all.dir.)GLCM Homogeneity(all.dir.)灰度共生矩阵熵
      灰度共生矩阵均质性
      自定义特征NDWINDVI归一化水体指数
      归一化植被指数
    • Table 3. Confusion matrices and associated classifier accuracies based on pixel-based and object-based classifications under three machine learning classifiers including CART, SVM and RF using GF-1 remote sensing image for classing the main district of Zhoukou urban

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      Table 3. Confusion matrices and associated classifier accuracies based on pixel-based and object-based classifications under three machine learning classifiers including CART, SVM and RF using GF-1 remote sensing image for classing the main district of Zhoukou urban

      面向像元CART分类混淆矩阵面向对象CART分类混淆矩阵
      农业用地林草地水体湿地建筑用地交通用地总计UA/%农业用地林草地水体湿地建筑用地交通用地总计UA/%
      农业用地6460948377.10农业用地7130017594.67
      林草地4590537183.10林草地2610106495.31
      水体湿地0047805585.45水体湿地1050005198.04
      建筑用地1204513310051.00建筑用地21180109485.10
      交通用地00016395570.90交通用地4008688085.00
      总计8065518979总计8065518979
      PA/%80.0090.7792.1657.3049.37PA/%88.7593.8598.0489.8986.08
      OA=71.43% Kappa=0.64OA=90.66% Kappa=0.88
      面向像元SVM分类混淆矩阵面向对象SVM分类混淆矩阵
      农业用地林草地水体湿地建筑用地交通用地总计UA/%农业用地林草地水体湿地建筑用地交通用地总计UA/%
      农业用地7120438088.75农业用地7210137793.50
      林草地3630306991.30林草地1640316992.75
      水体湿地00480048100.00水体湿地0051105298.08
      建筑用地503603510358.25建筑用地5007948889.77
      交通用地10022416464.06交通用地2005717891.03
      总计8065518979总计8065518979
      PA/%88.7596.9294.1167.4251.90PA/%90.0098.46100.0088.7689.87
      OA=77.75% Kappa=0.71OA=92.58% Kappa=0.91
      面向像元RF分类混淆矩阵面向对象RF分类混淆矩阵
      农业用地林草地水体湿地建筑用地交通用地总计UA/%农业用地林草地水体湿地建筑用地交通用地总计UA/%
      农业用地6630958379.52农业用地7210017497.30
      林草地7620637879.49林草地1640306894.12
      水体湿地0049305294.23水体湿地00510051100.00
      建筑用地60250147269.44建筑用地5008279487.23
      交通用地10021577972.15交通用地2004717792.20
      总计8065518979总计8065518979
      PA/%82.5095.3896.0856.1872.15PA/%90.0098.46100.0092.1389.87
      OA=78.02% Kappa=0.72OA=93.40% Kappa=0.92
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    Jie YE, Fanxiao MENG, Weiming BAI, Bin ZHANG, Jinming ZHENG. A Comparative Study on the Classification of GF-1 Remote Sensing Images for Zhoukou Urban under the Four Identical Condition[J]. Journal of Geo-information Science, 2020, 22(10): 2088

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    Paper Information

    Received: Sep. 2, 2019

    Accepted: --

    Published Online: Apr. 23, 2021

    The Author Email: MENG Fanxiao (mengfx1030@163.com)

    DOI:10.12082/dqxxkx.2020.190483

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