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arXiv 2409.09451cs.CVcs.LG

面向作物类型映射的基础模型通用性研究

On the Generalizability of Foundation Models for Crop Type Mapping

University of Illinois at Urbana-Champaign(伊利诺伊大学厄巴纳-香槟分校)

Yi-Chia Chang, Adam J. Stewart, Favyen Bastani, Piper Wolters, Shreya Kannan, George R. Huber, Jingtong Wang, Arindam Banerjee

AI总结:

本文评估了三种EO基础模型在五个大洲的五个作物分类数据集上的表现,发现专为Sentinel-2设计的SSL4EO-S12在通用性上表现更优,且需900张图像以缓解类别不平衡问题。

摘要:

预训练使用自监督学习的基础模型在多种下游任务中展现出强大的迁移学习能力,包括语言理解、文本生成和图像识别。遥感领域已产生几种直接在多光谱卫星影像上预训练的基础模型,用于精准农业、野火和干旱监测及自然灾害响应。然而,很少有研究探讨这些模型在新地理区域的泛化能力,以及地理空间偏见问题——即在数据丰富的发达国家训练的模型可能难以转移到数据稀缺的发展中国家。本文评估了三种流行的EO基础模型,SSL4EO-S12、SatlasPretrain和ImageNet,在五个大洲的五个作物分类数据集上的表现。结果表明,专为Sentinel-2设计的预训练权重,如SSL4EO-S12,在通用性上优于ImageNet等通用预训练权重。虽然仅100张标注图像就足以达到高整体准确率,但900张图像才足以缓解类别不平衡并提高平均准确率。

英文摘要:

Foundation models pre-trained using self-supervised learning have shown powerful transfer learning capabilities on various downstream tasks, including language understanding, text generation, and image recognition. The Earth observation (EO) field has produced several foundation models pre-trained directly on multispectral satellite imagery for applications like precision agriculture, wildfire and drought monitoring, and natural disaster response. However, few studies have investigated the ability of these models to generalize to new geographic locations, and potential concerns of geospatial bias -- models trained on data-rich developed nations not transferring well to data-scarce developing nations -- remain. We evaluate three popular EO foundation models, SSL4EO-S12, SatlasPretrain, and ImageNet, on five crop classification datasets across five continents. Results show that pre-trained weights designed explicitly for Sentinel-2, such as SSL4EO-S12, outperform general pre-trained weights like ImageNet. While only 100 labeled images are sufficient for achieving high overall accuracy, 900 images are required to mitigate class imbalance and improve average accuracy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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