自动亮度控制对微光电视系统强光适应性的影响  

Influence of automatic brightness control on the adaptation of low-light-level TV to high light

作　　者：郭冰涛[1] 王晓蕊[1] 荆卫国[2] 王小兵[2] 黄晓敏[1] 

机构地区：[1]西安电子科技大学技术物理学院 [2]中国人民解放军63870部队

出　　处：《强激光与粒子束》2013年第10期2582-2586,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(61007014);航空科学基金项目(2010181004)

摘　　要：定量分析了自动亮度控制对微光电视系统强光适应性的影响。结合系统信号响应特性,建立了自动亮度控制作用后强光能量与系统成像对比度的关系模型;充分考虑系统动态范围、增益特性、灰度量化等因素,建立了自动亮度控制电路作用后系统响应特性的定量表征模型。基于上述模型,建立了引入自动亮度控制后强光作用微光系统成像的数字仿真模型,并基于模拟输出图像定量分析了不同能量强光对系统侦察性能的影响。理论分析及实验仿真结果表明:自动亮度控制的引入,能够扩大微光系统的动态范围,增强微光电视系统的适用性,但同时导致系统随着强光光亮度增大,成像灰度及对比度下降,侦察性能下降。The influence of automatic brightness control on the adaptation of low-light-level TV to high light is quantitatively analyzed. First, combined with signal response characteristics, the relationship between the high light energy and the system ima- ging contrast is established. Then, simultaneously considering dynamic range, gain characteristic and gray level quantization, a feature quantitative model of low-light-level TV imaging after automatic brightness control operation is built. Finally, the digital simulation model of the imaging of the system which is disturbed by high light with automatic brightness control circuit, is estab- lished on the basis of the model aforementioned. Furthermore, an analysis of the effect of high light with different energy on the investigation ability of the system is deduced based on the analog output image. The theoretical analysis and experimental simula- tion results show that, the automatic brightness control expands the dynamic range and enhances the usability of the system, but it results in the declination of imaging quality and reconnaissance performance of the system.

关 键 词：自动亮度控制 微光电视 强光适应性 数字仿真 

分 类 号：TN221[电子电信—物理电子学]