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森林的组成、结构及其动态变化一直是林业遥感研究的一个热点,森林冠层结构对太阳辐射能量分布以及植被冠层的生物物理参数有非常重要的影响.针对计算机模拟模型难以用于大尺度的森林场景模拟和森林参数反演等问题,基于针叶枝简化的方法,分析了利用辐射度模型(RGM)进行森林冠反射特性研究,将森林生长模型(ZELIG)和L-系统结合进行三维虚拟森林场景建模,进而利用RGM模型模拟它们在可见光和近红外波段的双向反射率因子(BRF),并将模拟光谱和长白山研究区的多角度CHRIS(the compact high resolution imaging spectrometer)数据进行了比较.结果表明:模型模拟的5个角度光谱和图像光谱基本吻合.这将对利用RGM模型和多角度CHRIS数据进行森林冠层结构参数的反演具有重要的参考价值.
The composition, structure and dynamic changes of the forest have always been a hot topic in the field of remote sensing of forestry. The canopy structure of the forest has a very important influence on the solar radiation energy distribution and the biophysical parameters of the vegetation canopy. For the computer simulation model, Forest landscape simulation and forest parameter inversion. Based on the simplified method of coniferous shoots, the study on the reflection characteristics of canopy using radiantness model (RGM) is analyzed, and the three-dimensional virtual model of forest growth model (ZELIG) and L- And then use the RGM model to simulate their bidirectional reflectance factor (BRF) in the visible and near-infrared bands and compare the simulated spectra with the CHRIS (the compact high resolution imaging spectrometer) data from the Changbai Mountain study area The results show that the 5 angle spectra and the image spectra of the model are basically consistent, which will be of great reference value for the inversion of the canopy structure parameters using the RGM model and multi - angle CHRIS data.