线列探测器非均匀性对点目标检测的影响.pdfVIP

第31 卷 第2 期 红 外 技 术 Vol.31 No.2 2009 年 2 月 Infrared Technology Feb. 2009 线列探测器非均匀性对点目标检测的影响 1,2 1 郭杰锋 ，陈桂林 （1.中国科学院上海技术物理研究所，上海 200083 ；2. 中国科学院研究生院，北京 100039 ） 摘要：为了向点目标检测系统的非均匀性校正提供指标依据，从数学上推导并分析了线列探测器非均 匀性对点目标检测的影响，同时提出了一种仿真实验方法，得到了非均匀性对点目标信噪比和检测概 率的影响程度数据。实验结果表明，在信噪比小于 3 的情况下，非均匀性每增加 10%，点目标信噪比 下降约 3.6% ，检测概率平均下降约90.8%。在信噪比大于 3 的情况下，非均匀性每增加 10%，点目标 信噪比下降约 3.5% ，检测概率平均下降约34.8%。 关键字：非均匀性；点目标；检测；线列探测器；红外 中图分类号：TP75 文献标识码：A 文章编号：1001-8891(2009)02-0103-04 Influence of Nonuniformity of Line Array Detector on Point Target Detection GUO Jie-feng1,2，CHEN Gui-lin1 (1. Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China; 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China) Abstract ：In order to provide indicators to nonuniformity correction in point target detection system, the influence of nonuniformity of line array detector on point target detection is mathematically derived and analyzed. A method of simulation experiment is presented. Experimental data of signal to noise ratio of point target and probability of detection impacted by different degrees of nonuniformity is got. The results indicate that when signal to noise ratio is less than 3, each increase of 10% of nonuniformity will cause signal to noise ratio decrease 3.6% and probability of detection averagely decrease 90.8%. When signal to noise ratio is more than 3, each increase of 10% of nonuniformity will cause signal to noise ratio decrease 3.5% and probabilit