arXiv:2411.12897cs.LGcs.CV2024-11

用3D雷达数据和机器学习区分北欧八种树种,提升森林分类精度。

Tree Species Classification using Machine Learning and 3D Tomographic SAR -- a case study in Northern Europe

  • 基于3D层析SAR数据提取高度信息,用表格型机器学习模型分类
  • 在不同极化与几何配置下,分类准确率最高达86.4%
  • 结合激光雷达数据验证高度预测可靠性,适合林业管理应用

树种分类在自然保护、森林清查与管理中至关重要。过去四十年,遥感技术被广泛用于树种识别,合成孔径雷达(SAR)成为关键技术。本研究采用TomoSense 3D层析数据集,利用不同入射角采集的单视复数(SLC)图像生成地形三维表示。重点评估多种表格型机器学习模型,基于层析图像强度推导的高度信息对八种树种进行分类。分析了不同极化与地理分割配置下的表现,比较了各类模型性能,并通过贝叶斯优化进行参数调优。同时引入激光雷达(LiDAR)点云数据作为真实树高代理,提供模型预测对应的高度统计信息,以评估层析数据在树种分类中高度预测的可靠性。

原文摘要 · Abstract (English)

Tree species classification plays an important role in nature conservation, forest inventories, forest management, and the protection of endangered species. Over the past four decades, remote sensing technologies have been extensively utilized for tree species classification, with Synthetic Aperture Radar (SAR) emerging as a key technique. In this study, we employed TomoSense, a 3D tomographic dataset, which utilizes a stack of single-look complex (SLC) images, a byproduct of SAR, captured at different incidence angles to generate a three-dimensional representation of the terrain. Our research focuses on evaluating multiple tabular machine-learning models using the height information derived from the tomographic image intensities to classify eight distinct tree species. The SLC data and tomographic imagery were analyzed across different polarimetric configurations and geosplit configurations. We investigated the impact of these variations on classification accuracy, comparing the performance of various tabular machine-learning models and optimizing them using Bayesian optimization. Additionally, we incorporated a proxy for actual tree height using point cloud data from Light Detection and Ranging (LiDAR) to provide height statistics associated with the model's predictions. This comparison offers insights into the reliability of tomographic data in predicting tree species classification based on height.

树种分类3D SAR机器学习林业遥感

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