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基于不同地面分辨率的无人机图像监测水稻白叶枯

赵高源, 张亚莉, 张子超, 李志勇, 邓继忠

赵高源, 张亚莉, 张子超, 等. 基于不同地面分辨率的无人机图像监测水稻白叶枯[J]. 华南农业大学学报, 2025, 46(1): 115-123. DOI: 10.7671/j.issn.1001-411X.202401003
引用本文: 赵高源, 张亚莉, 张子超, 等. 基于不同地面分辨率的无人机图像监测水稻白叶枯[J]. 华南农业大学学报, 2025, 46(1): 115-123. DOI: 10.7671/j.issn.1001-411X.202401003
ZHAO Gaoyuan, ZHANG Yali, ZHANG Zichao, et al. Monitoring rice bacterial blight based on UAV images of different ground sampling distances (GSD)[J]. Journal of South China Agricultural University, 2025, 46(1): 115-123. DOI: 10.7671/j.issn.1001-411X.202401003
Citation: ZHAO Gaoyuan, ZHANG Yali, ZHANG Zichao, et al. Monitoring rice bacterial blight based on UAV images of different ground sampling distances (GSD)[J]. Journal of South China Agricultural University, 2025, 46(1): 115-123. DOI: 10.7671/j.issn.1001-411X.202401003

基于不同地面分辨率的无人机图像监测水稻白叶枯

基金项目: 广东省现代农业产业共性关键技术研发创新团队项目(2023KJ133)
详细信息
    作者简介:

    赵高源,博士研究生,主要从事无人机遥感图像获取与处理研究,E-mail: 1797808078@qq.com

    通讯作者:

    邓继忠,教授,博士,主要从事农业航空遥感图像获取处理与农情分析、机器视觉与图像分析技术的应用、模式识别技术的应用等研究,E-mail: jz-deng@scau.edu.cn

  • 中图分类号: S252;S435.11

Monitoring rice bacterial blight based on UAV images of different ground sampling distances (GSD)

  • 摘要:
    目的 

    快速无损地监测水稻白叶枯并量化感染程度,从而指导田间作业。

    方法 

    利用无人机获取受白叶枯病菌Xanthomonas oryzae pv. oryzae感染的水稻冠层高分辨率图像,提取颜色和纹理特征,分别构建基于颜色、纹理特征以及两者融合的多元回归模型,对白叶枯感染等级进行预测。探究不同地面分辨率(Ground sampling distances,GSD)对不同模型精度的影响。

    结果 

    基于颜色特征的监测模型的决定系数(Coefficient of determination,R2)为85.9%,均方根误差(Root mean square error,RMSE)为1.43,相对均方根误差(Relative RMSE,RRMSE)为19.1%,相比基于纹理特征的模型,R2上升了2.4个百分点,RRMSE增加了4.6个百分点;与单一种类特征相比,基于颜色和纹理特征融合的预测模型(R2=89.6%,RMSE=1.06,RRMSE=15.1%)精度有较大的提升;通过构建不同GSD模型发现,当GSD为0.2 、0.5或0.8 cm时,模型精度较高,R2 均在80%以上。

    结论 

    从无人机捕获的低空遥感图像中提取的颜色和纹理特征可用于监测水稻白叶枯病,结果可为无人机遥感监测水稻白叶枯提供有效的技术支持。

    Abstract:
    Objective 

    In order to monitor rice bacterial blight quickly and non-destructively, and guide field operations.

    Method 

    High-resolution images of rice canopy under bacterial blight stress were acquired using utilized unmanned aerial vehicles (UAVs). Color features and texture features were extracted from the images, and multiple regression models based on color features, texture features, and the fusion of color and texture features were constructed to predict the infection level of rice bacterial blight. The influence of different ground sampling distances (GSD) on the accuracy of the models was also explored.

    Result 

    The determination coefficient (R2) of the monitoring model based on color features was 85.9%, root mean square error (RMSE) was 1.43 and relative RMSE (RRMSE) was 19.1%. The R2 had increased by 2.4 percentage points and RRMSE had increased by 4.6 percentage points compared with the model based on texture features. Compared with single-feature models, the prediction model based on the fusion of color and texture features (R2=89.6%, RMSE=1.06, RRMSE=15.1%) exhibited significant improvement in accuracy. By constructing models with different GSDs, it was found that when the GSD was 0.2, 0.5 or 0.8 cm, the models achieved higher accuracy with R2 all above 80%.

    Conclusion 

    The color and texture features extracted from low-altitude remote sensing images captured by UAVs can be used for monitoring rice bacterial blight. The results can provide effective technical support for UAV remote sensing monitoring of rice bacterial blight.

  • 图  1   白叶枯分割操作流程图

    Figure  1.   Rice bacterial blight Segmentation Operation Flowchart

    图  2   水稻白叶枯4个感染等级样本

    Figure  2.   Samples of four infection levels in rice bacterial blight

    图  3   基于颜色特征(a)、纹理特征(b)和两者融合(c)的白叶枯感染率预测模型精度检验

    Figure  3.   Accuracy evaluation of prediction model of bacterial blight infection rate based on color features (a), texture features (b) and their fusion (c)

    图  4   不同GSD条件下白叶枯4个感染等级样本

    Figure  4.   Samples of four infection levels in rice bacterial blight under different GSD conditions

    图  5   区域尺度水稻白叶枯感染等级分布

    Figure  5.   Regional scale distribution of rice bacterial blight infection levels

    表  1   水稻白叶枯HSV颜色特征参数1)

    Table  1   HSV color features parameters of rice bacterial blight

    叶片感染等级
    Infection level of rice leaves
    $ {{\boldsymbol{H}}}_{{\boldsymbol{P}}} $ $ {{\boldsymbol{S}}}_{{\boldsymbol{P}}} $ $ {{\boldsymbol{V}}}_{{\boldsymbol{P}}} $
    $ {{\boldsymbol{\mu}} }_{{\boldsymbol{H}}} $ $ {{\boldsymbol{\delta}} }_{{\boldsymbol{H}}} $ $ {{\boldsymbol{\mu}} }_{{\boldsymbol{S}}} $ $ {{\boldsymbol{\delta}} }_{{\boldsymbol{S}}} $ $ {{\boldsymbol{\mu}} }_{{\boldsymbol{V}}} $ $ {{\boldsymbol{\delta}} }_{{\boldsymbol{V}}} $
    健康 Healthy 44.33 1110.57 129.16 8109.449 95.41 7645.89
    轻微 Slight 41.73 1241.46 139.03 9516.93 83.03 7882.55
    中度 Moderate 40.59 1164.32 143.80 9241.22 88.44 8289.44
    严重 Serious 39.62 1166.58 148.84 9263.31 89.82 8817.79
     1) $ {{\boldsymbol{H}}}_{{\boldsymbol{P}}} $、$ {{\boldsymbol{S}}}_{{\boldsymbol{P}}} $、$ {{\boldsymbol{V}}}_{{\boldsymbol{P}}} $分别表示图像H、S、V颜色分量;$ {\boldsymbol{\mu}} $表示HSV各分量的一阶矩阵;$ {\boldsymbol{\delta}} $表示HSV各分量的二阶矩阵。
     1) $ {{\boldsymbol{H}}}_{{\boldsymbol{P}}} $, $ {{\boldsymbol{S}}}_{{\boldsymbol{P}}} $ and $ {{\boldsymbol{V}}}_{{\boldsymbol{P}}} $ represent the color components H, S, and V of the image, respectively; μ represents the first-order moment of each HSV component, and δ represents the second-order moment of each HSV component.
    下载: 导出CSV

    表  2   不同GSD条件下白叶枯感染等级预测精度

    Table  2   Prediction accuracy of bacterial blight infection levels under different GSD conditions

    特征
    Feature
    地面分辨率/cm
    GSD
    决定系数/%
    R2
    均方根误差
    RMSE
    相对均方根误差/%
    RRMSE
    颜色
    Color
    0.1 85.9 1.43 19.1
    0.2 88.1 1.19 18.6
    0.5 85.8 0.86 25.9
    0.8 80.9 0.51 28
    1.0 74.0 0.43 62.0
    纹理
    Texture
    0.1 83.5 1.02 14.5
    0.2 84.6 0.93 13.2
    0.5 82.4 0.67 19.1
    0.8 74.6 0.17 12.1
    1.0 68.8 0.15 22.6
    颜色和纹理融合
    Fusion of color and texture
    0.1 89.6 1.06 15.1
    0.2 91.9 1.15 14.7
    0.5 86.6 0.32 10.1
    0.8 84.9 0.98 41.7
    1.0 73.8 0.12 23.1
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-01-01
  • 网络出版日期:  2024-12-08
  • 发布日期:  2024-12-12
  • 刊出日期:  2025-01-09

目录

    Corresponding author: DENG Jizhong, jz-deng@scau.edu.cn

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