Study on fast calibration method of photoelectric sighting

In order to solve the problems of complex operation and insufficient environmental adaptability in the traditional zero calibration process of sight, a fast calibration scheme of photoelectric sight is proposed. A rod insertion calibration device based on collimator is used and the collimator image collected by CCD is processed in this scheme. Through the image processing method of adaptive threshold Canny edge detection and Hough transform fitting, and the feature point acquisition method of point clustering, the center position of the cross image is obtained, and the deflection angle between the optical axis of the sight and the muzzle axis is calculated. Analysis and experimental results show that the average calibration error of this method is within 0.1mil. Compared with the traditional gun calibration process, this calibration method can achieve higher cold chamber calibration efficiency and environmental adaptability.