Generalized Algebraic Scene-based Nonuniformity Correction Algorithm
Optical Society of America
Journal of the Optical Society of America A
A generalization of a recently developed algebraic scene-based nonuniformity correction algorithm for focal plane array (FPA) sensors is presented. The new technique uses pairs of image frames exhibiting arbitrary one- or two-dimensional translational motion to compute compensator quantities that are then used to remove nonuniformity in the bias of the FPA response. Unlike its predecessor, the generalization does not require the use of either a blackbody calibration target or a shutter. The algorithm has a low computational overhead, lending itself to real-time hardware implementation. The high-quality correction ability of this technique is demonstrated through application to real IR data from both cooled and uncooled infrared FPAs. A theoretical and experimental error analysis is performed to study the accuracy of the bias compensator estimates in the presence of two main sources of error.
Ratliff, Bradley M.; Hayat, Majeed M.; and Tyo, J. Scott, "Generalized Algebraic Scene-based Nonuniformity Correction Algorithm" (2005). Electrical and Computer Engineering Faculty Research and Publications. 714.