Adjacency effect to hyperspectral signatures in field spectroscopy: The influence of pixel size and polarization of light energy

Accurate measurement and characterization of fluctuations in the remote sensing data from satellite, airborne or in situ measurement are important. The adjacency effect increases the reflection of the target pixel from nearby pixels and path scattering. There are many mathematic models and atmospheric correction methods, which could remove the adjacency effect from the satellite and airborne imaginary, but few discusses are made about the influence of adjacency effect on field spectroscopy. If we consider the variable come from the measure distance, which means the size of the target pixel, as the measure distance increases, it increase the path scattering such as unpolarized reflectance come from nearby pixels. Owing to the atmosphere and solar irradiance change varyingly in outdoor measurements, the research is indoor test under artificial light source to reduce the effect of uncertainties by measuring the reflectance of light energy from spectroradiometer. The influence of pixel sizes is evaluated on the adjacency effect from different background canopy density and selective absorption by polarizer.