文章从入口段亮度计算公式的物理意义和公式中的参数研究两方面论述察觉对比法，主要是小目标可见度与最小察觉对比、小目标可见度与入口段亮度的关系。在此基础上论述关于对比显示系数的研究，从对比显示系数与最低亮度阈值的关系、对比显示系数的计算机模拟与编程计算两角度入手，并以此作为实验室实验和现场实测的依据。%In this article, the perceived contrast method is discussed from two aspects. One is the physical meaning of threshold zone luminance formula, the other is study of the parameters in the formula. There are two main details should be seriously considered:the relationship between small target visibility and the mini⁃mum required perceived contrast;the connection between threshold zone luminance and small target visibility. On the base of the argument, the research of contrast revealing coefficient should be carried out from two per⁃spective. One perspective is the relationship between contrast revealing coefficient and minimum luminance threshold, the other is computer simulation and programming to calculate contrast revealing coefficient. Then these research work can be considered as the basis of further laboratory experiment and field measurement.
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