Method of Controlling Automatic Focusing of Motorized Zoom Lens

Abstract

The present invention discloses a method of controlling the automatic focus of the electric change lens. This method includes the following steps: the electric change lens is powered on and initialized; the zero zero -zero point and the focus zero point are found.Back to the default zero point from the factory; according to the memory of power off, the zoom to the memory multiple; focusing on the focus curve, and executing the automatic focus after the memory focus;Change the command zoom to the corresponding multiple; according to the focus tracking curve of different focal lengths, the real -time driver focuses on the corresponding focus position.The invention automatically adjusts the focus process in the focus process, which can ensure that the camera screen of the entire zoom process is clear and no need to adjust the focus; and a lens can use multiple scenarios, no manual disassembly, only software adjustment, module automatic adjustment of the module automatic adjustmentFocus to ensure that the picture is 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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