• Remote Sensing Technology and Application
  • Vol. 39, Issue 2, 362 (2024)
Xingxia ZHOU*, Yingjie WANG, and Pan YANG
Author Affiliations
  • The Third Institute of Photogrammetry and Remote Sensing,Ministry of Natural Resources,Chengdu 610100,China
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    DOI: 10.11873/j.issn.1004-0323.2024.2.0362 Cite this Article
    Xingxia ZHOU, Yingjie WANG, Pan YANG. Extraction of Crop Information in Cloudy Areas based on Optical and Radar Remote Sensing Images[J]. Remote Sensing Technology and Application, 2024, 39(2): 362 Copy Citation Text show less
    Location of the study area and distribution of crop sample sites
    Fig. 1. Location of the study area and distribution of crop sample sites
    Technique flowchart
    Fig. 2. Technique flowchart
    The evaluation chart of segmentation scales
    Fig. 3. The evaluation chart of segmentation scales
    Comparison of the multi-scale segmentation
    Fig. 4. Comparison of the multi-scale segmentation
    Multi-temporal vegetation indices curves
    Fig. 5. Multi-temporal vegetation indices curves
    Spectral characteristics curves of March 27, 2021
    Fig. 6. Spectral characteristics curves of March 27, 2021
    Time series diagram of backscattering coefficient of summer crops in study area
    Fig. 7. Time series diagram of backscattering coefficient of summer crops in study area
    Classification result in study area
    Fig. 8. Classification result in study area
    月份4月5月6月7月8月9月10月
    大春
    水稻播种出苗移栽出叶孕穗乳熟成熟
    玉米播种出苗拔节抽雄吐丝乳熟成熟
    大豆播种发芽期开花期结荚期鼓粒期成熟期
    月份10月11月12月1月2月3月4月
    小春
    油菜播种幼苗期蕾薹期开花期成熟
    小麦播种出苗返青起身拔节开花乳熟成熟
    土豆播种休眠期发芽期幼苗期发棵期结薯期成熟
    Table 1. Phenological periods of major crops in study area
    获取卫星数据等级获取日期作物物候期
    Sentinel-2L2A2021-3-27小麦:拔节期;油菜:开花期;土豆:结薯期
    Sentinel-2L2A2021-5-1水稻:出苗期;玉米:出苗期;大豆:发芽期
    Sentinel-2L2A2021-8-9水稻:乳熟期;玉米:乳熟期;大豆:结荚期
    Sentinel-1L1 GRD2021-5-5水稻:移栽期;玉米:出苗期;大豆:发芽期
    Sentinel-1L1 GRD2021-6-4水稻:出叶期;玉米:拔节期;大豆:发芽期
    Sentinel-1L1 GRD2021-7-16水稻:孕穗期;玉米:乳熟期;大豆:结荚期
    Sentinel-1L1 GRD2021-8-21水稻:乳熟期;玉米:成熟期;大豆:鼓粒期
    Sentinel-1L1 GRD2021-9-2水稻:成熟期;玉米:收割; 大豆:成熟期
    Table 2. Satellite image acquisition time in study area
    类型水稻小麦油菜蔬菜瓜果玉米大豆土豆林地裸地水体
    训练样本像素个数1 9502 0587301 0025995194105262 4961 149
    验证样本像素个数8358823124302572221752251 069493
    Table 3. Numbers of pixels of major classes
    光谱指数计算公式对应Sentinel-2波段
    NDVIρnir-ρred/ρnir+ρredBand8, Band4
    NDVI705ρ750-ρ705/ρ750+ρ705Band6, Band5
    CIρ750-800/ρ690-725-1Band7, Band5
    Table 4. Vegetation index and expression
    时相05-0506-0407-16
    作物大豆玉米水稻大豆玉米水稻大豆玉米水稻
    VH极化协同性0.0630.0580.0660.0660.0760.0760.0660.0590.058
    对比度542.940805.612516.419447.363659.497398.219549.634998.754595.226
    均值126.654126.739126.805126.901126.699126.903126.684127.417126.779
    方差41.91842.33241.96441.82542.06142.19441.51642.69241.868
    VV极化协同性0.0670.0670.0760.0660.0590.0770.0650.0670.074
    对比度681.822952.752563.469768.137845.567502.185754.706824.972565.951
    均值126.642126.864126.705126.484126.447126.895126.992126.298126.696
    方差41.97142.39441.56841.71842.07241.90941.72042.62341.598
    时相08-2109-02
    作物大豆玉米水稻大豆玉米水稻
    VH极化协同性0.0560.0590.0570.0560.0500.055
    对比度627.889523.769617.753650.683798.284677.142
    均值126.424127.043126.716126.353126.829126.717
    方差41.37042.17341.60941.31342.59141.546
    VV极化协同性0.0680.0600.0710.0670.0750.071
    对比度713.262963.489614.435846.636779.433638.578
    均值126.581126.282126.797126.581126.515126.415
    方差41.12842.67541.74741.81642.73140.929
    Table 5. Time series of texture features of summer crops in study area
    类别生产者精度/%用户精度/%
    水体95.6893.86
    裸地89.7390.52
    果树86.9589.78
    蔬菜瓜果68.2161.20
    小麦-水稻93.0992.59
    油菜-水稻94.389.15
    土豆-玉米70.3560.7
    土豆-大豆62.4758.98
    总精度/%85.49
    Kappa系数0.81
    Table 6. The classification accuracy in study area
    Xingxia ZHOU, Yingjie WANG, Pan YANG. Extraction of Crop Information in Cloudy Areas based on Optical and Radar Remote Sensing Images[J]. Remote Sensing Technology and Application, 2024, 39(2): 362
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