Scattering in polarimetric millimetre-wave imaging scene simulation

Neil A. Salmon; Pete R. Coward

doi:10.1117/12.669049

19 May 2006 Scattering in polarimetric millimetre-wave imaging scene simulation

Neil A. Salmon, Pete R. Coward

Proceedings Volume 6211, Passive Millimeter-Wave Imaging Technology IX; 621107 (2006) https://doi.org/10.1117/12.669049
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

This paper describes the further development of a scene simulation model to include the phenomenology of scattering. Scattering gives rise to increased absorption within media and forward and backscatter leads to a modification of the subject illumination. The amount of scattering from objects is linked to the relation between the radiation wavelength and the composition of the objects. When the object surface roughness and the particulate composition is of the order of the radiation wavelength, scattering dominates. However, for longer wavelengths, reflections tend to be more specular in character and the wave propagating within the medium retains the spatial coherence. Imaging of people and man made objects in the low frequency band of the millimetre wave region appears to be associated with this longer wavelength regime. However, in moving up in frequency to the sub-millimetre wave band, the fibrous composition of clothing and hair is likely to change this imaging phenomenology. This paper investigates how scattering phenomena can be included in polarimetric scene simulation. Simulated images are shown for passive and active imaging to demonstrate the scattering phenomenology.

Citation Download Citation

Neil A. Salmon and Pete R. Coward "Scattering in polarimetric millimetre-wave imaging scene simulation", Proc. SPIE 6211, Passive Millimeter-Wave Imaging Technology IX, 621107 (19 May 2006); https://doi.org/10.1117/12.669049

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