Controlling method of motor zoom lens automatic focusing

Abstract

The invention discloses a controlling method of motor zoom lens automatic focusing. The method comprises the following steps that initialization is carried out after the motor zoom lens is electrified; a zoom zero point and a focusing zero point are searched separately, and both zoom position and focusing position of the motor zoom lens are returned to zero points of factory default; according to power-off memory, the motor zoom lens is zoomed to memory multiple; after the focusing follows a focusing curve to memory focus, automatic focusing is implemented; the motor zoom lens is in a standby state and waits for a zoom demand; according to the zoom demand, the motor zoom lens is zoomed to the corresponding multiple; according to focusing tracking curves with different focal lengths, the focusing is driven in real time to the corresponding focusing position. According to the controlling method of motor zoom lens automatic focusing, automatic focus regulation is carried out in the focal length regulation process, clear camera pictures in the whole zooming process can be guaranteed, and focus regulating again is not needed; besides, a lens can be used in a plurality of scenes, the manual disassembly is not needed, only the software regulation is needed, focus can be adjusted by a module automatically, and the pictures are kept clear.

Description

technical field [0001] The invention relates to the technical field of security monitoring, in particular to a method for controlling automatic focusing of an electric zoom lens. Background technique [0002] In the existing conventional security monitoring, the network camera is an integrated product assembled from the camera module and the housing lens and other accessories. In the conventional monitoring, fixed-focus lenses and zoom lenses are mainly used at present: lenses with fixed focal length, and according to different If the scene requires it, choose lenses with different focal lengths. A zoom lens, a lens can have multiple focal lengths, and the focal length can be selected according to the needs of different scenes. Zoom lenses are divided into manual focus lenses and electric zoom lenses. Manual focus lens needs to manually adjust the focal length of the lens to adapt to different scenes; electric zoom lens, the lens focus is adjusted through software. [000...

AI Technical Summary

Problems solved by technology

[0003] Existing network modules use lenses with a fixed focal length, which can only monitor scenes within a fixed distance; lenses with manual focus need to be manually adjusted at the camera end, which is not timely and extremely inconvenient to operate

Basically, for the above two types of lenses, if you need to adjust the monitoring distance, the operation is as follows: 1. Dismantling the machine, disadvantages: manpower consumption; 2. Lens replacement or focal length adjustment, disadvantages: manpower consumption and material costs; 3. Refocusing; 4. , The machine is reinstalled, the operation is very complicated, there are many repetitive tasks, and the efficiency is low

[0004] However, the existing motorized lens still needs to adjust the focus after the focal length is adjusted by software. At most, the program or device for controlling the lens can achieve a few special focus points for a fixed scene. Once the scene changes, it needs to be reset. Although the cost of changing lenses is eliminated, there is still a lot of calibration time and inefficiency

[0005] Therefore, the existing focusing methods on the market cannot meet the needs of the market

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