从模型迁移到知识泛化:定量遥感反演中的迁移学习研究进展

From Model Transfer to Knowledge Generalization: Research Progress of Transfer Learning in Quantitative Remote Sensing Inversion

  • 摘要: 遥感定量反演是地表环境监测与资源评估的关键技术。传统反演算法受“分布一致性”假设的限制,且受限于样本数量少、分布偏移等问题,跨域泛化能力有限。迁移学习为应对上述问题提供了有效途径,并在定量遥感反演中的应用得到广泛关注。首先,本文系统阐述了迁移学习的基本概念,对协变量偏移、先验偏移与概念偏移三类分布差异及其在遥感中的表现形式等进行了系统分类与总结。接着,从迁移策略角度出发,归纳总结了主流迁移学习方法的研究思路和适用场景。然后,通过对迁移学习在植被、水环境、土壤和大气等领域定量遥感反演场景的文献分析,探讨了迁移学习在定量遥感领域的应用成效,分析了面临的问题和挑战。最后对迁移学习技术的发展趋势进行了展望,以期为今后的相关研究提供参考。

     

    Abstract: Quantitative remote sensing inversion aims to estimate surface parameters using satellite observations, which play a crucial role in environmental monitoring and resource assessment. This process involves pixel-level estimation of continuous variables that describe surface structure, function, and state, offering high spatial precision essential for accurate enviro nmental analysis. However, traditional quantitative inversion algorithms often assume “consistent distribution” between the training and application domains and are heavily reliant on large, representative datasets. As a result, model generalization performance can degrade when faced with spatiotemporal distribution shifts or data scarcity. Transfer learning, an approach that involves transferring knowledge from a source domain to a target domain, offers a promising solution to this problem. This method has gained increasing popularity in the field of quantitative remote sensing as it enables models to adapt to new domains with li mited data by leveraging knowledge from similar domains. First, a systematic review of transfer learning applications in quantitative remote sensing inversion is provided, starting with an explanation of the basic concepts of transfer learning. The review cla ssifies and summarizes three main types of distribution shifts: covariate shift, prior shift, and concept shift, and discusses how th ese shifts manifest in remote sensing. This offers a comprehensive understanding of the challenges and solutions associated with applying transfer learning in this field. Second, a detailed classification and summary of transfer learning solution strateg ies are provided from a methodological perspective. Third, a literature analysis evaluates the use of transfer learning across various remote sensing domains, including vegetation, aquatic environments, soils, and the atmosphere. The review emphasizes the effectiveness of transfer learning in addressing issues such as data scarcity and domain adaptation, providing valuable insig hts into the practical challenges and successes encountered. Finally, future trends in transfer learning technology are explored, with suggestions for ongoing research and development to further enhance its applicability in remote sensing tasks.

     

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