Abstract: In various embodiments, a method and system for compensating non-uniformities among detector elements of a detector array, without the use of dither mirrors or requirement of scene motion for non-uniformity correction achieved by computing scene spatial gradient and temporal gradient of image frames of the scene captured by the detector array at different times, and utilizing both the scene spatial and temporal gradients in detailed local gradient processing. Such local gradient processing may include computing masks to preserve spatial scene details, while eliminating scene noise (e.g., fixed pattern noise) from the captured image frames and correcting non-uniformity among detector elements.

Abstract: In various embodiments, a method and system for compensating non-uniformities among detector elements of a detector array, without the use of dither mirrors or requirement of scene motion for non-uniformity correction achieved by computing scene spatial gradient and temporal gradient of image frames of the scene captured by the detector array at different times, and utilizing both the scene spatial and temporal gradients in detailed local gradient processing. Such local gradient processing may include computing masks to preserve spatial scene details, while eliminating scene noise (e.g., fixed pattern noise) from the captured image frames and correcting non-uniformity among detector elements.

Abstract: 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.

Abstract: 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.