Polarization behavior of paints doped with silicone light diffusion agent

Parameter-based imaging from passive multispectral polarimetric measurements

“…The typical materials that would make up the container and the car hood are plastic and aluminum (or maybe carbon fiber) but it is likely that paint on these objects is actually being observed. In this case, the estimated values show some similarity to the paints studied previously [7,[13][14]23,36].…”

“…We assume the diffuse scattering is completely unpolarized and Lambertian where the light encounters enough multiple scattering events within the bulk of the material that the scattering directions and polarization state are uniformly random. In general, the diffuse scattering may exhibit some polarization and directional preference due to the re-emergence processes [23], but the assumptions of unpolarized and Lambertian scattering are reasonable especially for remote sensing scenarios where the target's surface roughness is typically large compared to the incident wavelength [9][10][11][12][13][14][15][16][17][18][19][20][21][22]. In contrast, the surface scattering that develops based on a microfacet model, can produce a directional lobe and polarization preference.…”