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Segmentation and crown parameter extraction of indiviudal trees in an airborne TomoSAR point cloud

机译:机载TomoSAR点云中单个树的分割和树冠参数提取

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摘要

The analysis of individual trees is an important field of research in the forest remote sensing community. While the current state-of-theart mostly focuses on the exploitation of optical imagery and airborne LiDAR data, modern SAR sensors have not yet met the interest\udof the research community in that regard. This paper describes how several critical parameters of individual deciduous trees can be extraced from airborne multi-aspect TomoSAR point clouds: First, the point cloud is segmented by unsupervised mean shift clustering.\udThen ellipsoid models are fitted to the points of each cluster. Finally, from these 3D ellipsoids the geometrical tree parameters location, height and crown radius are extracted. Evaluation with respect to a manually derived reference dataset prove that almost 86% of all trees are localized, thus providing a promising perspective for further research towards individual tree recognition from SAR data.
机译:对树木的分析是森林遥感界的重要研究领域。虽然当前的最新技术主要集中在光学图像和机载LiDAR数据的开发上,但现代SAR传感器尚未满足研究界在这方面的兴趣。本文描述了如何从机载多方面TomoSAR点云中推导出单个落叶树的几个关键参数:首先,通过无监督平均漂移聚类对点云进行分割。\ ud然后将椭圆模型拟合到每个簇的点。最后,从这些3D椭圆体中提取几何树参数位置,高度和冠部半径。对手动导出的参考数据集的评估证明,几乎所有树木中的86%都已本地化,因此为从SAR数据识别单个树木提供了广阔的前景。

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