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Camera Adaptive Focus Control Device, Method, and Computer-Readable Storage Medium

A focus control and control device technology, applied in image communication, TV, color TV components and other directions, can solve problems such as incorrect focus, camera virtual focus, etc., to overcome camera virtual focus, simple algorithm, and reduce post-maintenance. cost effect

Active Publication Date: 2021-07-02
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the object of the present invention is to provide a camera adaptive focus control device, method and computer-readable storage medium, to solve the camera virtual focus easily caused by the existing locomotive video surveillance system in a vibrating operating environment, and the Technical defect of incorrect focus caused by regrouping and decomposing

Method used

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  • Camera Adaptive Focus Control Device, Method, and Computer-Readable Storage Medium
  • Camera Adaptive Focus Control Device, Method, and Computer-Readable Storage Medium
  • Camera Adaptive Focus Control Device, Method, and Computer-Readable Storage Medium

Examples

Experimental program
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Embodiment 1

[0055] as attached figure 1 As shown, an embodiment of a camera adaptive focusing control device, the control device 10 specifically includes:

[0056] The active focus displacement value acquisition unit 1 acquires the active focus stepping motor displacement value St of the camera 100; the camera focusing script starts an active focusing with the aperture fully open and full focal length scanning, and obtains the current stepping motor displacement value after the action ends As the active focus stepper motor displacement value St;

[0057] The first comparison unit 2 compares the displacement value St of the active focusing stepping motor with the displacement value S0 of the stepping motor at the initial quasi-focus position, and if the difference between the two is greater than or equal to the universal quasi-focus position fluctuation threshold Wth, the active focusing step is discarded Enter the motor displacement value, retain the initial quasi-focus position stepping...

Embodiment 2

[0068] as attached figure 2 As shown, an embodiment of a camera adaptive focusing method specifically includes the following steps:

[0069] S10) Obtaining the displacement value St of the active focus stepping motor;

[0070] S20) Compare the active focus stepping motor displacement value St with the initial quasi-focus position stepping motor displacement value S0, if the difference between the two is greater than or equal to the universal quasi-focus position fluctuation threshold Wth, discard the active focus stepping motor displacement value St, retain the initial quasi-focus position stepper motor displacement value S0; if the difference between the two is less than the universal quasi-focus position fluctuation threshold Wth, then retain the active focus stepper motor displacement value St;

[0071] S30) Compare the stepping motor displacement value retained in the previous step with the universal quasi-focus position stepping motor displacement value Sc, and if the d...

Embodiment 3

[0111] as attached image 3 As shown, an embodiment of a video camera 100 specifically includes: the control device 10 described in Embodiment 1, the stepping motor 20 and the optical lens group 30 . The control device 10 adjusts the displacement of the stepping motor 20 , and the stepping motor 20 drives the optical lens group 30 to perform focusing operation.

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Abstract

The invention discloses a camera self-adaptive focusing control device, method and computer-readable storage medium, respectively acquiring active focus position, initial quasi-focus position, pan-focus position stepping motor displacement value, and universal quasi-focus position stepping motor Displacement value and fluctuation threshold. The comparison interval is composed of the universal focus position stepping motor displacement value plus or minus the fluctuation threshold. If only one of the initial quasi-focus position and the active focus stepping motor displacement value falls into this interval, select the value falling into this interval; if both If it falls into this range, the displacement value of the active focus stepping motor is selected preferentially; if none of them fall into this range, the displacement value of the stepping motor at the pan-focus position is selected. Move the stepper motor to the final selected displacement position and perform small-scale active focus correction. The invention can solve the technical problems of camera virtual focus easily caused by the existing locomotive video monitoring system under the vibration operation environment, and incorrect focus caused by locomotive regrouping and unmarshalling.

Description

technical field [0001] The present invention relates to the technical field of video surveillance, in particular to an adaptive focus control device, method, computer-readable storage medium, a camera including the computer-readable storage medium and its application in a road condition camera of a locomotive video surveillance system. Background technique [0002] At present, the existing camera focusing schemes are mainly aimed at auto-focusing and continuous tracking focusing for a single best effect. In the specific application environment of the road condition camera of the locomotive video surveillance system, because the locomotive is in the vibration environment for a long time, the focus position of the stepper motor will gradually change slightly, resulting in virtual focus. Focusing, maintenance is very troublesome. At the same time, the locomotives are frequently grouped and decomposed, and the field of view in front of them will change greatly. When they are de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232
CPCH04N23/67
Inventor 张平余志浩吕宇吴可夫皮志超张彭辉加玉涛梁兴元
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD