An improved nonuniformity correction algorithm for IRFPA
To improve nonuniformity correction real-time performance of infrared focal plane arrays (IRFPA), a novel compression nonuniformity correction algorithm is proposed. In this paper the basic principle of the proposed algorithm are expounded, and its real-time performance is tested by hardware. Experimental results show that the proposed algorithm has the less calculation and the higher speed than traditional nonuniformity correction algorithm based on blackbody, and this helps to realization of real-time nonuniformity correction of IRFPA.
METHOD OF NONUNIFORMITY CORRECTION FOR IRFPA WITH NONLINEAR RESPONSE
Aiming at the nonlinearity of photoresponse characteristic in infrared focal plane arrays,a approach of nonuniformity correction for IRFPA,named "curve-beeline" correction,was proposed,and the correction formula was given.The simulation results show that it has perfect performance of high precision,and less calculation.Only a few parameters are needed to storage and it is easy to implement by hardware circuit.
Digital implementation of scene based non-uniformity correction for microscan-mode infrared cameras
A real-time implementation of scene-based non-uniformity correction (SBNUC) using a digital technique is proposed for microscan-mode staring infrared cameras. Most SBNUC algorithms, without sensor motion, cannot be applied to stationary scenes because of image blurring and fading. Using a microscanning effect, coupled with a modified version of Scribner's algorithm, the proposed technique can correct the artefacts and non-uniformities in real-time.