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首页> 外文会议>International Symposium on Plant Growth Modeling, Simulation, Visualization and their Applications; 20031013-20031016; Beijing; CN >Could Virtual Plants be Considered as Lambertian Objects in Dense Canopies?
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Could Virtual Plants be Considered as Lambertian Objects in Dense Canopies?

机译：在茂密的树冠中，可以将虚拟植物视为朗伯对象吗？

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摘要

Light absorption by plant organs determines the development of a canopy directly through photobiological processes and indirectly through its action on organ temperature. Recent radiative models enable light absorption to be estimated for each individual organs within a canopy. A limitation of the development of these models is the difficulty of measuring and accounting for the bidirectional optical properties of phytoelements. Thus most of these models rely on the Lambertian approximation. In this paper we attempt to evaluate this approximation for dense canopies in the solar spectrum. Simulations were performed with Monte-Carlo ray tracing for three canopies, three sun positions, and two spectral domains (PAR and NIR). Results prove the validity of the Lambertian approximation for the simulation of the absorption of light by plants in the studied domain.
机译：植物器官的光吸收直接通过光生物学过程决定了冠层的发育，并间接地通过其对器官温度的作用来决定冠层的发育。最近的辐射模型使得可以对树冠内每个器官的光吸收进行估算。这些模型的发展的局限性在于难以测量和解释植物元素的双向光学特性。因此，这些模型大多数都依赖于Lambertian近似。在本文中，我们尝试对太阳光谱中的密集树冠进行这种近似评估。使用蒙特卡洛射线追踪对三个遮篷，三个太阳位置和两个光谱域（PAR和NIR）进行了模拟。结果证明了Lambertian近似对于研究领域中植物吸收光的模拟的有效性。

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