利用辐射度模型实现冠层光合有效辐射分布  

3D distribution simulation of plant canopy photosynthetic active radiation based on radiosity

作　　者：段辉丽[1] 王晶晶 王芳洁[1] 

机构地区：[1]宜昌市测绘大队,湖北宜昌443000 [2]军事经济学院襄阳士官学校基础部,湖北襄阳441118

出　　处：《计算机工程与应用》2017年第23期184-189,共6页Computer Engineering and Applications

基　　金：国家高技术研究发展计划(863)(No.2012AA102002);福建省重点科技项目(No.2012N5006)

摘　　要：提出基于辐射度模型模拟单株虚拟植物冠层光合有效辐射分布的技术流程,采用半立方体算法计算辐射度模型的形状因子,逐步求精迭代法解辐射度线性方程组,计算虚拟植物模型任意空间位置的辐射度值和能量值。通过对比基于光线跟踪模型和辐射度模型模拟冠层太阳直射光合有效辐射,不仅发现基于两种模型的模拟结果具有较好的一致性,而且基于辐射度模型的模拟更具合理性。最后,分析冠层净光合速率进一步验证基于辐射度模型模拟冠层光合有效辐射的有效性。This paper proposes a method, which is based on radiosity simulating the 3 D distribution of photosynthetic active radiation of virtual plant canopy. Firstly, the radiosity model is obtained by using the semi-cube algorithm of form factor. Then, linear equations are solved by incremental refinement radiosity iterative solution method. Finally, the value of radiosity and energy of virtual plant model at any spatial location are calculated. Compared with ray tracing model simulating direct sun canopy PAR, the results of the radiation model are not only good and consistent, but also more reasonable. Analysis on canopy net photosynthetic rate further validates the effectiveness of the proposed method.

关 键 词：光合有效辐射 虚拟植物 辐射度模型 三维空间分布 三维可视化 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]