Quick measurement of multi-optical axis line-of-sight deviations

Multi-camera is widely used in systems such as optoelectronic pods and security cameras; However, the optical axis deviation problem in multi-camera systems has a great impact on the measurement precision and accuracy of the system. When calibrating a multi-optical axis system, conventional methods usually take a long time and have limited accuracy. In order to solve the problem of accuracy and speed of multi-optical axis line-of-sight deviation measurement, this paper proposes a fast measurement method for multi-optical axis line-of-sight deviation. The gray matrix inter-correlation algorithm is utilized for rapid and precise calibration of the optical axes across multiple cameras. A reference point on the optical axis of one camera is selected as a benchmark, and a small template is extracted from its vicinity to be matched with images from other cameras. This process allows for the determination of differences between the reference point and the optical axes in other cameras, enabling measurement of their line-of-sight deviations. In this study, experiments were conducted using Electro-Optical Targeting System and inserted-axis detector to illustrate this process with two optical axes. At the same time, it solves the problem that the inserted-axis detector camera is not parallel to the axis, and ensures the consistency of the optical axis and the inserted axis. The experimental results show that this paper's method has a high accuracy.