大家知道,用电滤波将电信号从电噪声中取出来,是很有效的。空间滤波就是一种与这种电滤波相应的滤波,电滤波是一种只有与经过时间相应的一维滤波作用的滤波器,而空间滤波则用来取出二维画面中的光学辐射体,至少具有二维滤波的作用。构成空间滤波有二种方法。一种适用于激光光源之类的相干光,已经有很多很好的解说。因此,本文只介绍适用于非相干光的空间滤波。为容易理解起见,先看一下光学探测或跟踪系统。为了探测或标定辐射目标,系统 As you know, it is very effective to remove the electrical signal from the electrical noise by using electrical filtering. Spatial filtering is a filter corresponding to such an electrical filter, which is a filter that operates only with a one-dimensional filter over time, while spatial filtering is used to extract the optical radiator in a two-dimensional picture, at least With two-dimensional filter effect. There are two ways to form spatial filtering. There is already a lot of good commentary on a type of coherent light suitable for use with a laser light source. Therefore, this article only introduces the spatial filtering suitable for incoherent light. For ease of understanding, take a look at the optical detection or tracking system. In order to detect or calibrate the radiation target, the system