Soil signature simulation of complex mixtures and particle size distributions

摘要: Soil reflectance signatures were modeled using the digital imaging and remote sensing image gen- eration model Blender three-dimensional (3-D) graphic design software. Using these tools, geometry, radiometry, chemistry of quartz magnetite exploited to presence particle size porosity effects in visible shortwave infrared spectrum. physics engines within 3-D software, physical representations granular soil scenes created. Each scene char- acterized a specific distribution density. Chemical optical properties pure mag- netite assigned particles based on size. This work presents describe an observed phase-angle dependence beach sand Bidirectional simulated for targets varying provides validation phenomenological trade space between density complex, heterogeneous mixtures. It also confirms suggestion that directional can be defined by intimate mixtures depend pore spac- ing. The study demonstrated combining realistic target geometry spectral measurements magnetite, could without functional data fitting or rigorous analysis material dynamics. research does not use traditional function-based models sim- ulation. combination physically viable structure, first-principles ray-tracing enables ability represent signature changes have been experimental observations. © Authors. Published SPIE under Creative Commons Attribution 3.0 Unported License. Distribution reproduction this whole part requires full attribution original publication, including its DOI. (DOI: 10.1117/1.OE.54.9.094103)