摘要
从微光图像的成像过程出发,运用光谱积分建立了微光成像系统的统一模型,分析了日光与夜天光的光谱分布,深入讨论了地面光谱反射特性对成像的影响,对白天与夜间地面反射特性造成的日光图像与微光图像的对比度差异进行了对比研究。实验结果与理论分析达到了很好的一致,对微光图像分析和微光图像仿真有指导意义。
According to the procedure of low-light-level （LLL） imaging, a universal model of LLL imaging system was established by using expressions of spectral integrals. The spectrum distributions of sunlight and night sky radiation were analyzed. The effect of ground spectral reflectance on imaging was discussed deeply. And the difference of contrast between daytime image and LLL image caused by ground reflectance was studied. The results of experiments agree greatly with theoretical analysis. It is of momentous guidable significance for LLL image analysis and LLL image simulation.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2007年第4期436-439,共4页
Acta Armamentarii
关键词
光学
微光成像
地面光谱反射特性
日光图像
光谱分布
图像处理
optics
low-light-level imaging
ground spectral reflectance
daytime image
spectrum distribution
image processing
