在一定距离上观察地面目标时的发现概率,取决于目标的大小、形状,目标、背景的亮度及其亮度对比,大气透明条件,观察者的视觉特性和心理状态等因素,其中除大气透明状况随时间,地点而变化不定外,其他影响因素在一定条件下都是相对稳定或可以控制的,为了预测不同气象条件下不同等级伪装目标的发现概率,本文扼要阐述了 The probability of finding a ground target at a distance depends on factors such as the target’s size, shape, target, background brightness and brightness contrast, the transparency of the atmosphere, the observer’s visual characteristics and the state of mind, With the change of time and place, other influencing factors are relatively stable or can be controlled under certain conditions. In order to predict the probability of finding disguised targets at different levels under different weather conditions, this article briefly states