灯光干扰对微光成像系统性能的影响

根据灯光干扰源作用微光成像系统的两种途径，建立了灯光干扰辐射传输模型；分析了灯光干扰对微光成像系统响应特性的影响，建立了灯光干扰辐射能量与系统响应特性的量化关系模型；以实测和理论计算数据为基础构建了仿真平台，实现了灯光干扰下微光成像的模拟仿真，并对仿真图像的灰度均值、均方误差和相关函数进行了计算，结果表明微光成像质量与灯光干扰源位置和亮度有直接关系，且灯光干扰源位置的不同会导致灰度相关函数变化趋势的差异；进行了灯光干扰实验，实验结果和模拟结果的成像质量变化趋势基本一致，同时实验结果表明灯光干扰会导致目标与背景成像对比度增大，且随着干扰距离增大到一定距离后，逐渐减小至小于无干扰时。

Performance of low-light-level imaging system under light interference

Based on two ways of light interference to LLL(Low-light-level) imaging system, the transmission model of light interference was established. Response characteristics of LLL imaging system was also analysed, and quantitative relation model of light radiant energy with response characteristics was also established. With simulation platform designed based on the data of theory and practice, low-light-level imaging under light interference was simulated. Computing results of gray mean, mean-square error and correlation function indicate that the quality of low-light-level imaging is directly related to the position and lightness of light interference source. The different position also can lead to different trend of correlation function. The light interference experiment was carried out, whose results were in agreement with simulation. It also indicate that the contrast between target and background is increased under light interference. And it is gradually decreased with increasing interference distance untill less then without interference.