DITHERLESS NON-UNIFORMITY COMPENSATION FOR INFRARED DETECTOR ARRAYS WITH RECURSIVE SPATIAL LOW PASS FILTERING

A non-dither spatio-temporal low pass filter method for compensating non-uniformity of the responses of detector elements of an infrared detector array. The methods can be used for one-dimensional scanning arrays and for two-dimensional staring arrays. (FIGS. 3 and 6). First it is determined whether the scene and the detector array have sufficient relative motion for use of a spatio-temporal low pass filter type non-uniformity compensation (NUC) algorithm. If so the NUC algorithm is applied, which recursively uses both spatial and temporal information from near neighbors as a basis to correct fixed pattern noise on the detector array.