Automatic deviation correction method and system for optical axis of machine core of camera

Abstract

The invention discloses an automatic deviation correction method for an optical axis of a machine core of a camera. The automatic deviation correction method comprises the steps of preparing a background object on which cross curves are drawn, adjusting the multiplying power of the camera to the minimum and adjusting relative positions of the camera and the background object to enable the background object to be fill with the frame of the camera; controlling the multiplying power of the camera to the maximum; enabling the intersection of the cross curves in the camera frame to be overlapped with the intersection of the cross curves in the background object; finding the position of the intersection of the cross curves in the background object and calculating an optical axis deviation pixel difference value between the position of the intersection of the cross curves in the background object and the intersection of the cross curves of the camera frame in horizontal and vertical directions and in the presence of each multiplying power; judging whether the optical axis deviation pixel difference value between the position of the intersection of the cross curves in the background object and the intersection of the cross curves of the camera frame in the horizontal and vertical directions and in the presence of one test multiplying power is as same as the difference value in the presence of the last test multiplying power; if not, recording; and sending the recorded optical axis deviation pixel difference value to the camera. The automatic deviation correction method and system for the optical axis of the machine core of the camera are automatic and simple; and cost is saved.

Description

technical field [0001] The invention relates to the field of video security monitoring, in particular to a method and system for automatically correcting the optical axis of a camera core. Background technique [0002] The general camera movement has the function of zooming, that is, the function of zooming in and out on the object being photographed. When the zoom of the camera movement changes, the optical axis will shift. In layman's terms, the optical axis shift is when an object is seen at the center of the screen at a certain magnification, but after zooming in or out, the object is usually not still at the center, but toward the center of the screen. Up, down, left or right shifted, this shift is the optical axis shift. Optical axis offset can cause large errors in the camera system and needs to be corrected. To correct the optical axis offset, the optical axis offset must be measured first. To correct the optical axis offset, the magnitude of the optical axis offs...

AI Technical Summary

Problems solved by technology

However, since each camera produced is different, it is necessary to calibrate the optical axis of each camera before measurement, and then manually measure the data for each camera, and then input the data into the camera. bring a lot of work

Moreover, if the measured data is too much, it will be time-consuming and error-prone, and if the measured data is small, the fitted mathematical function will not be accurate enough, and the calculated optical axis deviation will be inaccurate

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