摘要
为了验证时-空过采样系统对点目标探测的优越性,设计了红外点目标成像仿真及实验系统,研究并验证了时-空过采样获得的点目标图像形状、能量分布特点。首先,对比分析了时-空过采样系统与常规采样系统对点目标扫描成像原理;然后,对时-空过采样系统成像过程建立模型,通过仿真研究该系统对点目标的成像特点;最后,设计红外点目标成像实验并对实验数据进行分析。仿真及实验结果证明了时-空过采样克服了单采样对点目标成像能量分散的问题,图像信噪比至少提高2倍以上,且验证了经时-空过采样后,点目标像素之间具有特定的相关规律。利用时-空过采样的点目标成像特点,可为点目标的快速检出提供有利条件。
Temporal-spatial Oversampling （TSO） system has unique advantage for infrared point target detection. Infrared point target imaging simulations and experiments were designed. The shapes and energy distribution of point target in infrared image which were taken by TSO and ordinary sampling systems were researched. The point target imaging features were verified by the simulations and experiment results. First, principle of TSO system for point target imaging was compared with principle of ordinary sampling system, the main difference of the two sampling system was the arrangement of infrared detector＇s pixels. The arrangement of pixels in TSO system used half-sensor-alignment to improve the efficiency of point target energy collection. Then, imaging models of TSO and ordinary sampling system were built for simulations of point target imaging by two systems. The two systems characteristics were researched by simulations. And also the statistical characteristics of maximum pixels were analyzed. Simulation results show TSO system can get more stable point target imaging. Finally, infrared point target imaging experiments of two system were designed. The experiment results show that the temporalspatial oversampling system can overcome the bad influence have special characteristics in temporal-spatial oversampling infrared point target detection more effectively. by phase noise. And the target images also system. These characteristics can make the
出处
《红外与激光工程》
EI
CSCD
北大核心
2015年第10期3124-3129,共6页
Infrared and Laser Engineering
关键词
时-空过采样
红外点目标探测
扫描成像
Temporal-Spatial Oversampling
infrared point target detection
scanning imaging
作者简介
张文昱（1982-），男，工程师，硕士，主要从事红外点目标探测方面的研究。Email：wenyu713@126．com
