Recent trials results of a LWIR polarimeter
2009
The aim of this paper is to describe the results of various trials involving a high-resolution thermal imager that has been
designed to be sensitive to polarised radiation. Polarisation has the potential to discriminate man-made objects and
disturbed earth from background clutter. Polarisation combined with conventional thermal imaging within the one
camera offers the potential to significantly reduce false alarms in surveillance and detection applications. The camera
used during the trials is a technology demonstrator developed by Thales Optronics, UK. The camera operates in the longwave
infra red and has a QWIP polarisation-sensitive detector. The results presented in this paper include recent trials in
the UK and USA. The aim of the trials was to assess the utility in using a LWIR polarimeter for detection of difficult
objects from background clutter. Thermal and polarised images were captured and processed in order to detect
anomalies. Several polarisation-based discriminative imaging techniques are applied to trials imagery. The effect of the
diurnal cycle on the effectiveness of polarisation for object discrimination will be assessed.
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