Leaf polarized 3-D vector RT modeling simulation based on Monte Carlo sampling

Abstract

To simulate precisely leaf light polarization, we propose to adopt VRT formalism to leaves based on the MC forward ray tracing. Two phenomena are taken into account; (i) decrease by absorption within the different tissues governed by absorption coefficients; (ii) reflection or transmittance in interface between tissues that is governed by the refractive indexes. Rays travel generally long distance before exiting the medium, leading to long running time. To reduce it, we develop a model to predict the average ray effect. Moreover, as hyper-spectral simulations are useful, a new MC weighted sampling is proposed to simulate close wavelengths using the same tracing. Alike, multi-angular measurements are simulated together based on ray origin progressive forget.