使用现实的3D天花板模型来计算现场光拦截的重要性
Shunfu Xiao1, Shuaipeng Fei1, Qing Li1
1College of Land Science and Technology, China Agricultural University, Beijing, China.
Plant phenomics (Washington, D.C.)
|August 21, 2023
概括
现实的3D树冠模型 (RCM) 对于在作物中进行准确的光拦截测量至关重要. 虚拟3D树冠模型 (VCMs) 显示出显著的偏差,特别是在生长季后.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 遥感 遥感 遥感 遥感
背景情况:
- 准确量化树冠光线拦截对于优化作物产量和质量至关重要.
- 3D植物建模和光学模拟是评估辐射分布的关键工具.
- 现实的3D天花板模型 (RCM) 很难获得,这导致频繁使用虚拟3D天花板模型 (VCM).
研究的目的:
- 为了比较现实的3D天花板模型 (RCMs) 和虚拟的3D天花板模型 (VCMs) 之间的光拦截差异.
- 评估VCMs在表示现场规模光拦截动态方面的准确性.
主要方法:
- 从动作多视图立体 (SfM-MVS) 来使用无人机 (UAV) 横环斜 (CCO) 摄影和结构重建现实的3D玉米树冠模型 (RCM).
- 通过从RCM中复制1,4和8个单独的植物,创建三个虚拟3D树冠模型 (VCM-1,VCM-4,VCM-8).
- 在RCMs和VCMs之间计算和比较每单位面积 (DLI) 的每日光拦截.
主要成果:
- 与RCM相比,VCM显示了DLI的显著偏差,相对根平均平方误差 (rRMSE) 范围为15.48%至20.22%.
- 在VCM中增加复制植物的数量减少了错误,但即使在8个植物 (VCM-8) 中仍然存在显著差异.
- 在较晚的生长阶段 (播种后70天) 与较早的生长阶段 (播种后48天) 相比,RCM和VCM之间的差异更为明显.
结论:
- 虚拟3D树冠模型 (VCM) 提供了对树冠光线拦截的不准确估计,特别是在晚期的作物发育阶段.
- 现实的3D天花板模型 (RCM) 对于精确的现场规模的光拦截计算至关重要.
- 未来的研究应该专注于改善RCM的获取和集成,以实现更可靠的农业建模.
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