| 基于LiDAR数据和Quickbird影像的树高提取方法及应用 |
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| 引用本文： | 王臻,吴连喜,苏伟,孙崇利.基于LiDAR数据和Quickbird影像的树高提取方法及应用[J].安徽农业科学,2011,39(23):14089-14093. |
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| 作者姓名： | 王臻 吴连喜 苏伟 孙崇利 |
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| 作者单位： | 1. 东华理工大学核资源与环境教育部重点实验室,江西南昌,330013
2. 中国农业大学信息与电气工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金项目(40801128);核资源与环境教育部重点实验室开放基金项目(081212) |
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| 摘 要： | 为了有效提取树冠边界、树冠顶点和树高信息,提出了一种考虑下层木高度的树高查找模型。该模型通过基于数学形态学的分水岭方法分割滤波处理后的LiDAR数据和Quickbird影像获取树冠边界;取树冠内最高点作为树冠顶点,提取树高;并利用W eibull函数预测下层木高度。试验结果表明,该方法能够自动有效地提取树冠边界,树高信息与野外实测的高度信息的R2=0.93,W eibull函数预测R2=0.93,能够满足实际应用的需求。
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| 关 键 词： | 分水岭分割 LiDAR 半方差函数 Weibull函数 |
A LiDAR Based Tree Height Model and Its Application |
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| Institution: | WANG Zhen et al(Key Laboratory of Nuclear Resources and Environment(East China Institute of Technology),Ministry of Education,Nanchang,Jiangxi 330013) |
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| Abstract: | In order to effectively extract the crown boundary and the tree height information,a suppressed trees considering tree height model was found.Tree boundary was obtained by mathematical morphology based on watershed segmentation worked on the LiDAR data after filtering and Quickbird images.The highest point of extraction trees were considered as crown apex.Weibull distribution was used to predicted height distribution of the suppressed trees.The results showed that the method can automatically and effectively extract the crown border,comparing the height by the model and field-measured with R2=0.93 and Weibull function used with R2=0.93.The accuracy showed good fulfillment with the requirement of practical application. |
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| Keywords: | Watershed segmentation LiDAR Semivariance function Weibull function |
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