弱目标检测系统中红外焦平面阵列非均匀性校正算法的研究

提出了一种在弱目标检测系统中,线列或面阵红外焦平面的非均匀校正算法-基于可变积分时间和均衡噪声的两点现场校正算法.该算法充分结合了基于标定的校正算法和基于景象的校正算法的优点,考虑了焦平面阵列在不同积分时间下暗电流的变化、有效地均衡了各探测单元的噪声影响,使目标的信噪比达到了最佳效果.实验结果表明该方法在校正性能和对弱目标的提取能力上要明显优于两点校正算法.

STUDY ON IRFPA NONUNIFORMITY CORRECTION IN DIM TARGET DETECTION SYSTEM

A new method,named 'two point IRFPA nonuniformity correction method based on integration adjustment and noise equilibrium',to correct IRFPA nonuniformity in dim target detection system was presented.This method fully takes advantages of both demarcate-based and scene-based IRFPA nonuniformity correction methods.By considering dark current va-(riance) and noise characteristics of every detector cell into consideration,this method gives optimal S/N performance.Experiment results show that its performance is more perfect than that of two-point correction algorithm.