Abstract
The sampling limitations associated with focal plane array imagers caused an aliased signal that corrupts the image. The aliased signal is a function of pre-sample blur, sampling frequency, and post-blur or image reconstruction. Previous experiments at the U.S. Army Night Vision and Electronic Sensors Directorate have quantified the effect of aliasing on the task of infrared target identification. Based on data from these experiments, the MTF Squeeze model was developed. The degraded performance due to under- sampling was modeled as an increase in system blur or, equivalently, a contraction or `squeeze' in the MTF. This paper describes the results of numerous sampling experiments.
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