直视型微光夜视仪分辨率的快速自动检测方法

摘要

This paper aims to realize the automatic resolution measurement of direct-view low-light level night vision device.Hough transform is used to detect the position-lines on a special-made resolution panel for getting the position of resolution patterns.Contrast is used as the threshold value to realize the automatic interpretation of resolution.In order to weaken the electronic noise and improve the accuracy of positioning,morphological algorithm and the method of averaging a number of pictures are used.The simulations and experiments show that the detection error of this method is not more than 1 group.The automatic detection device of resolution according to this principle can automatically detect the resolution of night vision device.The detection result is in conjunction with the result of human interpretation under normal circumstances.%为实现直视型微光夜视仪分辨率的自动检测,采用Hough变换的方法对特制的含有定位线的分辨率板图案进行定位,并利用对比度作为分辨率阈值来实现分辨率的自动判读.同时为了减弱电子噪声,提高Hough变换的定位精度,在图案定位过程中,利用形态学运算及多幅图像平均的方法.仿真及实验表明,该方法对分辨率检测的结果误差在1组以内.根据该原理制作的分辨率自动检测装置可实现对分辨率的自动检测,检测结果与正常情况下人眼判读结果一致.