当前位置:首页>南京>南京大学杜培军团队ISPRS最新成果 | WSPE弱监督框架融合SAM2+TabPFN,大规模农业地块提取效率翻倍

南京大学杜培军团队ISPRS最新成果 | WSPE弱监督框架融合SAM2+TabPFN,大规模农业地块提取效率翻倍

  • 2026-02-12 00:50:33
南京大学杜培军团队ISPRS最新成果 | WSPE弱监督框架融合SAM2+TabPFN,大规模农业地块提取效率翻倍

论文摘要

从超高分辨率(VHR)图像中大规模、细粒度地提取农业地块对精准农业至关重要。然而,传统的地块分割方法和全监督深度学习方法通常因昂贵的人工标注而面临可扩展性限制,而分割精度一般受分割架构表示复杂农业场景能力不足的限制。为应对这些挑战,本研究提出一种用于农业地块提取的弱监督方法(WSPE),该方法利用公开可用的10米分辨率图像和标签来指导0.5米农业地块的划定。WSPE框架整合了表格(表格先验数据拟合网络,TabPFN)和视觉基础模型(分割一切模型2,SAM2),以初步生成具有高几何精度的伪标签。这些伪标签通过基于课程学习的自适应噪声标签校正模块进一步细化以提高语义准确性。经过细化的知识被提炼到所提出的三分支柯尔莫哥洛夫 - 阿诺德增强边界感知网络(TKBNet)中,这是一种无需提示的端到端架构,能够快速推理和可扩展部署,其输出通过后处理向量化。在来自中国九个农业区的自建数据集、公共AI4Boundaries和FGFD数据集以及三个大规模区域:周口、衡水和丰城上评估了WSPE的有效性。结果表明,WSPE及其集成的TKBNet在具有不同农业场景的数据集上均实现了稳健的性能,大量的对比和消融实验验证了这一点。该弱监督方法实现了全监督性能的97.7%,大规模部署验证了其可扩展性和泛化能力,为细粒度、大规模农业地块测绘提供了一种实用解决方案。代码可在https://github.com/zhaowenpeng/WSPE获取。

关键图表

图 1.弱监督农业地块提取(WSPE)的整体技术路线图

图 2.Transformer - 知识增强骨干网络(TKBNet)的主要组件。F1- F4 为 ResNet-50 网络四个残差块的输出;DwConv 表示深度可分离卷积,GN 表示分组归一化,GAP 表示全局平均池化。
图 3.中国研究区分布图。红色五角星标记 12 个代表性样本点的地理位置,并展示对应区域 0.5 米分辨率谷歌地球卫星影像。
图 4.不同农业区下,弱监督农业地块提取(WSPE)、全监督农业地块提取(FSWSPE)与公开土地覆盖产品的农业地块提取结果定性对比。影像:0.5 米分辨率谷歌地球影像;EWC:欧空局全球土地覆盖产品;ELC:Eris 土地覆盖产品;DW:动态世界数据集;FSWSPE:全监督农业地块提取方法。

图 5.A-APD 数据集上,不同农业区下弱监督农业地块提取(WSPE)与多种标签高效方法的农业地块提取结果定性对比。影像:0.5 米分辨率谷歌地球影像;GT:真实标签。

图 6. F-APD 数据集上,Transformer - 知识增强骨干网络(TKBNet)与当前主流语义分割方法的定性对比。影像:0.5 米分辨率谷歌地球影像;GT:真实标签。

图 7.AI4Boundaries 数据集上,Transformer - 知识增强骨干网络(TKBNet)与当前主流语义分割方法的定性对比。影像:0.5 米分辨率谷歌地球影像;GT:真实标签。

图 8.FGFD 数据集上,Transformer - 知识增强骨干网络(TKBNet)与当前主流语义分割方法的定性对比。影像:0.5 米分辨率谷歌地球影像;GT:真实标签。

图 9.弱监督农业地块提取(WSPE)框架的消融实验结果定性对比。影像:0.5 米分辨率谷歌地球影像;GT:真实标签;配置 M1-M10 对应表 4 中报告的实验设置。

图 10.自适应修正触发器的实证验证与伪标签误差的可视化修正结果。

图 11.弱监督农业地块提取(WSPE)框架不同阶段特征的 t - 分布随机邻域嵌入(T-SNE)可视化。

图 12.随机森林(Random Forest)、极端梯度提升(XGBoost)、类别梯度提升(CatBoost)及其平均值的训练样本量消融曲线。上图为归一化的 ROC 曲线下面积(ROC-AUC),下图为 F1 分数,均以训练样本数量为横坐标绘制。

图 13.中国九大农业区上,TabPFN、极端梯度提升(XGBoost)、类别梯度提升(CatBoost)与随机森林(Random Forest)的 ROC 曲线及综合指标雷达图。

图 14.跨尺度伪标签优化的分步贡献定性对比。影像:0.5 米分辨率谷歌地球影像;GT:真实标签;步骤 1:土地覆盖先验初始化(LCPI);步骤 2:土地覆盖先验初始化→迭代类别细化(ICR);步骤 3:土地覆盖先验初始化→迭代类别细化→迭代噪声去除(INR);步骤 4:土地覆盖先验初始化→迭代类别细化→迭代噪声去除→跨尺度提示生成(CPG);步骤 5:土地覆盖先验初始化→迭代类别细化→迭代噪声去除→跨尺度提示生成→基于 SAM2 的伪标签优化(SPR)。

图 15.Transformer - 知识增强骨干网络(TKBNet)的消融实验结果定性对比。影像:0.5 米分辨率谷歌地球影像;GT:真实标签;(a-f)三种数据集上不同模型的分割结果对比,红色表示假阳性,蓝色表示假阴性;(g-h)对应的梯度加权类激活映射(Grad-CAM)热力图。

图 16.三种基准数据集上,Transformer - 知识增强骨干网络(TKBNet)与分支替换变体的定性对比。对最后一个特征提取层应用梯度加权类激活映射(Grad-CAM)进行可视化。

图 17.语义分割模型的精度 - 效率权衡分析。左图为平均交并比(mIoU)与参数量的关系,右图为平均交并比与推理速度的关系;红色五角星表示 Transformer - 知识增强骨干网络(TKBNet),蓝色圆点表示通用分割模型,黄色圆点表示遥感专用分割方法;平均交并比为 F-APD、FGFD、AI4Boundaries 三个数据集的平均值。

图 18.弱监督农业地块提取(WSPE)框架在三个大规模研究区的制图与矢量化结果。(a)周口;(b)衡水;(c)丰城;最左侧列展示全监督弱监督农业地块提取(F-WSPE)的大规模农业地块提取结果,其余列展示放大后的局部结果及对应的矢量化成果。

图 19.复杂农业条件下弱监督农业地块提取(WSPE)框架的代表性失效案例。INR:迭代噪声去除;CPG:跨尺度提示生成;SPR:基于 SAM2 的伪标签优化。

END

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  1. CONNECT:[ UseTime:0.000431s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000550s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000988s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000766s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000482s ]
  6. SELECT * FROM `set` [ RunTime:0.000187s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000547s ]
  8. SELECT * FROM `article` WHERE `id` = 471276 LIMIT 1 [ RunTime:0.002239s ]
  9. UPDATE `article` SET `lasttime` = 1770899829 WHERE `id` = 471276 [ RunTime:0.012687s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000273s ]
  11. SELECT * FROM `article` WHERE `id` < 471276 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.009648s ]
  12. SELECT * FROM `article` WHERE `id` > 471276 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.007480s ]
  13. SELECT * FROM `article` WHERE `id` < 471276 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.011119s ]
  14. SELECT * FROM `article` WHERE `id` < 471276 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.015832s ]
  15. SELECT * FROM `article` WHERE `id` < 471276 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.012723s ]
0.142521s