采用前置栅网滤波的天基红外成像点目标探测技术  

Point target detection of SBIRS based on front wire grid filtering

作　　者：夏润秋[1] 金伟其[1] 刘斌[1] 黄倩[1] 

机构地区：[1]北京理工大学光电学院光电成像技术与系统教育部重点实验室,北京100081

出　　处：《红外与激光工程》2011年第10期1829-1834,共6页Infrared and Laser Engineering

基　　金：国家自然科学基金(60877060);十一五总装预研项目(404050301)

摘　　要：天基红外成像预警大多属于点目标探测,如何在复杂背景及随机点噪声条件下实现点目标的有效探测和跟踪是天基红外预警技术重点研究内容。研究了新型前置栅网滤波热成像理论,分析了基于前置栅网滤波形成特定衍射斑对天基红外成像点目标探测的影响,利用Matlab对栅网的滤波效果进行了模拟仿真,所得仿真图像与实验图像的衍射强度分布具有较好的一致性;并在相同点目标能量条件下,对点目标及其前置栅网滤波衍射图案进行了人眼视觉探测实验,初步分析表明了其对于点目标探测和跟踪的有效性,为进一步研究和发展高性能的天基红外成像技术提供了一种新途径。Space-based infrared system （SBIRS） for early warning usually uses point target detection. Obviously, effective detection and tracking of point target in cluttered background is not easy to realize. The method of solving this problem is one of the key research directions at present. The imaging principle of thermal imaging system with a front wire grid filtering was studied, and the influence of its diffraction spot on the point detection of SBIRS was analyzed. Then, the effect of wire grid filtering was simulated by Matlab and the result was similar to the true image. At last, an experiment of human eye detecting to point target and diffraction pattern by wire grid filtering which had been set the same total energy was carried out. The experiment shows its validity of improving point target detection and tracking. It is a new way to conduct further research and development of high-performance SBIRS.

关 键 词：热成像 前置栅网 衍射 点目标 探测 跟踪 

分 类 号：TN216[电子电信—物理电子学]