| 梁其福,兰新国,马超,王娟.芒果树冠层体积提取方法研究[J].中国南方果树,2025,54(5): |
| 芒果树冠层体积提取方法研究 |
| Research on canopy volume extraction methods for mango trees |
| 投稿时间：2024-05-08 修订日期：2024-08-20 |
| DOI：10.13938/j.issn.1007-1431.20240249 |
| 中文关键词: 芒果树 冠层体积 倾斜摄影 激光雷达 |
| 英文关键词:Mango tree Canopy volume Oblique photography LiDAR. |
| 基金项目:国家自然科学基金青年项目（32201670）;海南省重点研发计划项目（ZDYF2022XDNY273）; 海南省重点研发计划项目（ZDYF2020195） |
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| 中文摘要: |
| 目前，我国芒果产业受地域分布和冠层自然生长方式的影响，通过人工测量提取冠层结构特征的方式在精度和效率方面已无法满足需求。这导致作物冠层结构对航空施药沉积的影响机理不明确，因此研究一种迅速且精确地提取芒果树冠层结构特征的方法至关重要。因此，使用无人机倾斜摄影技术与激光雷达技术对芒果树冠层体积进行提取，结果确立了激光雷达技术作物冠层体积准确性的基准方法，最佳体积算法为三维凹包法。在此基础上，对使用无人机倾斜摄影技术提取的芒果树冠层的体积提取方法进行了评估。评估结果显示，最佳体积提取方法为凹包切片法，其R2和RMSE分别为0.960和1.368 m3。通过上述方法证明：激光雷达技术与无人机倾斜摄影技术皆可应用于芒果树冠层结构特征提取，但无人机倾斜摄影技术能够更便捷、迅速的对芒果树冠层结构特征进行提取。 |
| 英文摘要: |
| At present, by the influence of geographical distribution and the natural growth mode of the canopy in China""s mango industry, the way of extracting canopy structure characteristics through manual measurement can no longer meet the demand in terms of accuracy and efficiency. It resulted in an unclear mechanism for the influence of crop canopy structure on aerial application deposition， so it was crucial to investigate a method to rapidly and accurately extract canopy structure characteristics of mango trees. Therefore, in this paper, the canopy volume of mango trees was extracted using drone tilt-photography and LiDAR technology and the results establish a baseline method for crop canopy volume accuracy by LiDAR technology, with the best volume algorithm being the 3D concave packet method. Based on this, this paper also evaluates a volumetric extraction method for mango tree canopies extracted using drone tilt photography. The evaluation showed that the best method was the concave packet slicing method with R2 and RMSE of 0.960 and 1.368 m3, respectively. Through the above methods, it is proved that both LiDAR technology and drone tilting photography technology can be used to extract structural features of mango tree canopy, but drone tilting photography technology can be more convenient and rapid to extract structural features of mango tree canopy. |
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