Method for synchronizing focusing operation and zooming operation

Abstract

The invention discloses a method for synchronizing focusing operation and zooming operation. The method for synchronizing the focusing operation and the zooming operation is used for solving the problem that in the prior art, after the shooting object distance is changed due to scene changes, images are fuzzy to a great extent in the zooming process and after the zooming process is accomplished. The method for synchronizing the focusing operation and the zooming operation comprises the steps that in the zooming process, a switching mode for switching zooming tracking curves and a zooming tracking curve are determined, wherein the next cycle of rotation of a zooming motor and a focusing motor is driven according to the zooming tracking curve; the zooming tracking curves are switched, and the zooming motor and the focusing motor are driven to synchronously rotate according to the changed zooming tracking curve. Automatic focusing can be achieved in the zooming process, the situation that after multiplying power of an image is zoomed to form high multiplying power, the image is in a fuzzy state so that the focusing direction of automatic focusing operation cannot be easily judged is avoided, the difficulty of automatic focusing operation is reduced, and the focusing speed is increased.

Description

technical field [0001] The invention relates to the field of video monitoring, in particular to a method for synchronous focusing during zooming. Background technique [0002] The integrated camera has the functions of zooming and auto-focusing. It has a compact structure, is easy to use, and has a wide monitoring range. It has been widely used in the field of video surveillance. How to achieve fast zoom speed, fast and accurate focusing, and avoid image blurring are very important for integrated cameras. [0003] Since the zoom lens and focus lens in the integrated camera lens move separately, driven by the zoom motor and the focus motor respectively, during the zoom process, zoom tracking is required so that the focus lens changes synchronously according to the position of the zoom lens , so that the image can be clearly focused. [0004] The full zoom speed is the key performance of the integrated camera, which generally needs to be completed within 3 to 4 seconds. Ther...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method of synchronous focusing during the zooming process to solve the problem in the prior art that after the subject distance changes due to scene changes, the image is relatively blurred during the zooming process and after the zooming is completed. question

Images