光电成像目标光学特性和捕获率研究

Research on optical properties and capture efficiency of photoelectric imaging target

针对复杂环境光电跟踪成像系统的目标跟踪性能不稳定问题,根据目标自身成像辐射特性和目标运动特点,建立跟踪成像系统目标特性模型,利用光度学知识建立光电成像系统内部噪声影响的对比度阈值函数,依据目标探测距离、目标尺寸、环境照度以及成像面阵CCD自身特性,建立光电成像系统目标跟踪捕获率的计算模型。通过计算与分析,给出不同背景照度、不同的曝光量、光照度等因素条件下的系统捕获率,不同目标对比度和不同距离的目标探测概率、辨认概率和识别概率之间的关系,验证了所建立的捕获率计算函数是科学的。

Aiming at the instability problem of the target tracking performance of the photoelectric tracking imaging system in complex environment,this paper establishes the target characteristic model of the tracking imaging system according to the characteristics of the target＇s own imaging radiation and the target motion,deduces the contrast threshold function of the internal noise effect of the photoelectric imaging system by the photometric knowledge.Based on the target detection distance,target size,ambient illumination and the characteristics of the imaging area array CCD,a calculation model for the target tracking acquisition rate of the photoelectric imaging system is established.Through calculation and analysis,gives out the system capture rate under different background illumination,different exposure,illumination and other factors,analyzes the relationship between the target detection probability,recognition probability and recognition probability of different target contrasts and different distances,results verify scientific of the established capture rate calculation function.