扫描型焦平面热成像系统的亚像元处理算法研究

STUDY ON SUB-PIXEL PROCESSING ALGORITHM FOR SCANNING FPA THERMAL IMAGING SYSTEM

通过对垂直方向具有光学微扫描的288×4焦平面热成像过程的分析研究,提出了一种可实现亚像元成像处理算法,在垂直扫描的方向可使探测器传递函数的截止频率提高一倍,可明显改善系统成像质量和作用距离.算法简单,处理工作量小,易于实现实时处理.算法的实现对提高扫描型热成像系统的技术战术性能指标具有重要意义.

Based on an analysis of imaging process of 288 ×4 FPA （Focal Plane Array） thermal imaging system with vertical micro-scanning, a processing algorithm for realizing sub-pixel imaging was proposed. The method doubles the cut-off frequency in vertical MTF （ Modulate Transfer Function） of the detector, and markedly improves the system imaging quality and action range. The algorithm is simple, the amount of treatment is small, and a real time processing is easily achieved. The realization of this algorithm has great significance in improving technological tactic performance of thermal imaging systems.