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Resistor Array IR Scene Projector Non-uniformity Real-time Correction
Author(s): 
Pages: 521-526
Year: Issue:  7
Journal: Infrared Technology

Keyword:  resistor arrayIR scene projectorinfrared imagehardware-in-the-loop simulation;
Abstract: Resistor array is a kind of emissive IR scene projector. In order to improve the quality of projected image and enhance the credibility of simulation, the non-uniformity of the resistor array need to be corrected. The structure and mechanism analysis of resistor array indicates that the non-uniformity represents a fix pattern spatial noise. Research of radiant pixels response presents a nonlinear characteristic of resistor array. The essence of non-uniformity is the difference between radiant pixels’ response. The non-uniformity was corrected by adjusting the inputs of each radiant pixel according to test data acquired previously. The nonlinearity was preprocessed to decrease the demand of test data for non-uniformity correction. Piecewise linear interpolation was applied to realize on-line non-uniformity correction algorithm and improve the real-time quality of the algorithm. Numeric simulation results indicate that the algorithm can reduce the non-uniformity to 1% below and satisfy the frame rate up to 200Hz in 128×128 and 256×256 pixels format. The non-uniformity correction method presented can meet the demand of infrared image hardware-in-the-loop simulation for image quality and frame rate.
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