期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：1992
卷号：XXIX Part B7
页码：26-34
出版社：Copernicus Publications
摘要：A Monte Carlo ray tracing system, known as 'the Advanced RAdiometric RAy Tracer' (ARARAT) has been developed asa tool for simulating radiance as measured by remote sensing instruments. The system takes 3-D geometric models ofvegetation and/or surfac~ topographic data (Digital Elevation Model- DEM) with associated radiometric attributes, andrenders a scene for given illumination conditions for a given set of sensor characteristics.ARARAT has been designed primarily for use with plant geometric data generated with the UCL Botanical PlantModelling System to provide a simulation system capable of realistically simulating directional radiance and reflectanceto allow investigations of the dependence of the signal received at a remote sensing instrument on the complexradiometric and geometric properties of plant canopies.The design philosophy and implementation of ARARAT are discussed in this paper, with reference to Monte Carlomethods of estimating the integral of the radiance rendering equation.Results of simulated maize (Zea mais) canopy reflectance are presented for the simple rendering case of singly-scattereddirectional radiance, and compared with values measured in the field.
关键词：Bidirectional Reflectance Distribution Function; Canopy Simulation; Monte Carlo Ray Tracing
