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与传统光电成像系统成像质量的评价方法相比,最小可分辨对比度(MRC)能够更全面地反映光电成像系统的极限性能。它考虑了系统的灵敏度、噪声、目标空间频率以及人眼视觉特性等因素对系统阈值对比度的影响,可用于光电成像系统的视距估算。在分析微光ICCD成像系统工作原理的基础上,研制了新型微光ICCD成像系统MRC特性测试仪。以该系统为实验装置、以Weibull心理测量方程为理论基础设计了一种选择性靶标。基于选择性靶标,提出了一种基于强迫性选择MRC测量的新方法,利用该方法对微光ICCD成像系统进行了实际测量。该方法对建立微光ICCD成像系统MRC理论模型具有重要的指导意义,对直视型微光成像系统MRC特性的测量具有借鉴意义,对光电成像系统成像质量的评价具有重要的使用价值。
Compared with the evaluation method of the imaging quality of the traditional photoelectric imaging system, the minimum resolvable contrast ratio (MRC) can more fully reflect the limit performance of the electro-optical imaging system. It considers the influence of system sensitivity, noise, target spatial frequency and human visual characteristics on the threshold contrast of the system and can be used to estimate the line-of-sight of a photoelectric imaging system. On the basis of analyzing the operating principle of the microlight ICCD imaging system, a new microchromic ICCD imaging system MRC characteristic tester was developed. Using this system as an experimental device, a selective target was designed based on the Weibull psychometric equation. Based on the selective target, a new method based on forced selection MRC measurement was proposed. The method was used to measure the ICIC imaging system. The method has important guiding significance for establishing the MRC theoretical model of the microlight ICCD imaging system, and has reference significance for measuring the MRC characteristics of the direct-view microlouser imaging system. It has an important value in the evaluation of the imaging quality of the electrophotographic imaging system.