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A method and device for auto-focusing

A technology for automatic focusing and focusing of signals, which is applied to parts of color TVs, parts of TV systems, TVs, etc., and can solve problems such as manual and tedious focusing work.

Active Publication Date: 2017-12-05
山东浪潮数字能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the current method of focusing the laser night vision device, after each turning the angle of the laser night vision device or adjusting the shooting distance of the laser night vision device, it is necessary to manually carry out tedious focusing work

Method used

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  • A method and device for auto-focusing
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  • A method and device for auto-focusing

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Embodiment Construction

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] like figure 1 As shown, an embodiment of the present invention provides an automatic focusing method, including:

[0042] Step 101: Set the variable num, and set the initial value of the variable num to the first eigenvalue;

[0043] Step 102: Real-time detection of whether at least one of the focal length and position of the camera has changed, if yes, execute step 103, otherwise continue to execute step 102;

[0044] Step 103: increasing the ...

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PUM

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Abstract

The present invention provides an automatic focusing method and device, the method comprising: setting a variable num, and setting the initial value of the variable num to the first characteristic value; detecting in real time whether at least one of the focal length and the position of the camera changes; If so, increase the current value of the variable num by a predetermined value; judge in real time whether the current value of the variable num is the first characteristic value; if not, form a focus signal, and subtract the current value of the num The predetermined value; controlling the camera to focus according to the focus signal. The device includes: a first setting unit, a detection unit, a calculation unit, a first judgment unit, a signal generator and a controller. This solution can realize the automatic focus of the camera.

Description

technical field [0001] The invention relates to the field of video monitoring, in particular to an automatic focusing method and device. Background technique [0002] For safety precautions or to record related processes, surveillance cameras are used more and more widely. For example, shopping malls, traffic intersections, and factories are all equipped with surveillance cameras to record corresponding illegal or criminal acts and provide evidence for public security organs to handle cases. In order to obtain a larger monitoring range and clearer images, laser night vision devices are generally used for monitoring at present. Laser night vision devices include infrared laser illuminator, zoom lens, infrared camera and pan / tilt. After the pan / tilt of the camera is rotated or the camera lens is zoomed in, the object captured by the camera changes, and the laser night vision device needs to be refocused to obtain the clearest video image. [0003] At present, laser night visi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232
Inventor 肖时航梁华勇于治楼
Owner 山东浪潮数字能源科技有限公司