非制冷红外探测器非均匀性的校正方法

Nonuniform correction method for uncooled infrared detector

两点温度定标校正算法是非制冷红外探测器的有效的非均匀性校正技术。根据焦平面特性和两点算法,提出一种采用两级存储结构的现场可编程门阵列实现途径:流水运算,采用分级存储校正系数和并行结构运算部件。仿真和试验证明:这种方法具有高速、系数存储大容量、可扩展的特点,适合于大阵列非制冷红外焦平面的实时校正。

The algorithm of the two-point temperature correction is a effective nonuniform correction technique for uncooled IR detector. According to the characteristics of focal plane array (FPA) and the nonuniform correction algorithm, a new method basing on two-level memory structure implemented with field programmable gate array is proposed for the real-time correction of IR FPA, in which pipeline operation is used and the correction data is stored in two-level memories. Both simulation and experimental results indicate that the method has the characteristics of high speed,great capacity and exparisibility,and is suitable for real-time correction of uncooled infrared focal plane array.