CAJ | 학술논문

二代扫描型热像仪的非均匀性校正（NUC）通常采用定点两点温度校正法或定点多点温度校正法，采用定点校正无法适应时间或环境的变化对探测器带来的影响，造成校正偏离，空间噪声增大。通过在成像光路中设置2个可控温的黑体完成探测器的实时校正，保证在不同时刻以及不同应用环境下，黑体的温度始终实时地跟随场景温度，校正系数实时更新，使非均匀性校正的输出误差有效降低。通过实际多个场景对比试验，采用传统定点校正，非均匀性噪声约为4．0，而该方法的噪声不大于2，有效降低50％。
이대소묘형열상의적비균균성교정（NUC）통상채용정점량점온도교정법혹정점다점온도교정법，채용정점교정무법괄응시간혹배경적변화대탐측기대래적영향，조성교정편리，공간조성증대。통과재성상광로중설치2개가공온적흑체완성탐측기적실시교정，보증재불동시각이급불동응용배경하，흑체적온도시종실시지근수장경온도，교정계수실시경신，사비균균성교정적수출오차유효강저。통과실제다개장경대비시험，채용전통정점교정，비균균성조성약위4．0，이해방법적조성불대우2，유효강저50％。
Non-uniformity correction (NUC) of 2nd generation scanning thermal imager usually utilizes the fixed two-point temperature calibration method or the fixed multi-point temperature calibration method .However ,the fixed-point correction cannot adapt to the changes of the de-tectors caused by the environment or time ,hence the calibration parameter is deviated and the space errors increase .We put forward a kind of real-time correction method by setting two controllable temperature blackbodies in the light path ,and the temperature of the blackbody always followed that of the scene in real time .So the correction parameter was updated in real time to effectively reduce the output error .With some contrast tests of the different scenes , results show that for the traditional fixed point correction ,the size of the nonuniformity noise is about 4 .0 ,w hile adopting the method of this paper ,the size of the noise is not greater than 2 ,effectively reduces 50% .