Analyzing hyperspectral BRDF data of a grass lawn and watercress surface using an empirical model

This paper presents results from analyzing hyperspectral BRDF data of grass lawn and watercress. The intensity of the hotspot as a function of wavelength is determined from fitting an empirical (or rather phenomenological) model to the data. The model consists of a lambertian, bowlshape, hotspot and forward scattering component. An analytical, theoretically derived relation between the hotspot intensity and the lambertian component is given. The intensity of the multiple scattered radiation obtained from this relation can be explained qualitatively with the surface structures of the samples