热释电IRFPA非均匀性校正实验系统研究

 采用虚拟仪器技术，设计了基于LabVIEW软件平台的热释电IRFPA（红外焦平面阵列）非均匀性校正系统。该系统可通过控制面板选择校正算法，选取3种不同的标准像元的标准校正曲线。可以对IRFPA待校正的像元输出进行采集,对非均匀性参数进行测试，还可以进行非均匀性校正。系统通过三维波形以及图像的显示来观察校正前后对比，并能计算出校正前后的NU（非均匀性）值大小。对像元数为120×160的热释电IRFPA输出的视频信号进行了非均匀性校正实验，对非均匀性校正算法进行了统计对比，对仿真结果及数据进行了分析总结。经过校正实验验证了系统的可行性，结果证明基于平均值法的两点定标算法对热释电IRFPA非均匀性校正后的NU值是最小的。通过统计数据得出校正后的NU可平均下降30%。

Nonuniformity correction experiment system of pyroelectric IRFPA

By using the virtual instrument technology, non-uniformity correction system of pyroelectric infrared focal plane array (IRFPA) was designed based on LabVIEW software platform. The system can select correction algrithm by using the control panel, and choose three different normal pixels to make different standard correction curves. Moreover,it can be used to acquire the IRFPA pixels- output, test the non-uniformity parameter and correct the non-uniformity. The system can observe the correction contrast with the three-dimensional waveforms and images as well as compute the value of NU (non-uniformity). The non-uniformity correction experiment was done on  the 120×160 pyroelectric IRFPA video signals. Meaningwhile, the non-uniformity correction algorithms were compared, and the simulation data results were analysed. The feasibility of this system was validated. And it is indicated that the mean algorithm of the two point correction is the least for the pyroelectric IRFPA to correct non-uniformity. By the statistical data, it is proved that the value of NU can be averagely decreased by 30%.