1. A method of removing noise from image frames captured by an infrared imaging device, the method comprising: receiving an intentionally blurred image frame, wherein the blurred image frame comprises blurred thermal image data associated with a scene and noise introduced by the infrared imaging device; determining, for each row of the blurred image frame, a corresponding row fixed pattern noise (FPN) correction term; determining, for each column of the blurred image frame, a corresponding column FPN correction term; applying the row and column FPN correction terms to the blurred image frame to provide a corrected blurred image frame; processing the corrected blurred image frame to determine a plurality of non-uniformity correction (NUC) terms to reduce a portion of the noise comprising spatially uncorrelated fixed pattern noise (FPN); and applying the NUC terms to the captured image frames.