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Method and device for controlling supplementary light

A control method and fill light technology, which can be applied to televisions, closed-circuit television systems, color TV components, etc., and can solve problems such as the cycle switch of fill lights

Active Publication Date: 2020-05-26
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a supplementary light control method and device, which is used to solve the problem in the prior art that the supplementary light is always in a cycle switch state due to a large amount of light reflected by the reflector

Method used

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  • Method and device for controlling supplementary light
  • Method and device for controlling supplementary light
  • Method and device for controlling supplementary light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] figure 1 A schematic diagram of a supplementary light control process provided by an embodiment of the present invention, the process includes the following steps:

[0045] S101: Acquire a first preset number of consecutive first images, and an analog-to-digital converter ADC sampling value output by a photoresistor corresponding to each first image.

[0046] The supplementary light control method provided by the embodiment of the present invention is applied to an electronic device, and the electronic device may be a PC, a tablet computer or the like, or may be an image acquisition device.

[0047] The image acquisition device can perform image acquisition, and a photoresistor can be installed in the image acquisition device. The photoresistor can output the ADC sampling value corresponding to the image collected by the image acquisition device by sensing the brightness of the environment. The ADC sampling value can be a voltage value or is the current value. The gre...

Embodiment 2

[0053] In order to accurately determine whether each ADC sampling value obtained meets the preset conditions for changing the state of the fill light, on the basis of the above-mentioned embodiments, in the embodiment of the present invention, the determination of whether each ADC sampling value obtained All meet the preset conditions for changing the state of the fill light. If yes, change the current state of the fill light. If not, keep the current state of the fill light including:

[0054] When the supplementary light is turned off, it is judged whether each ADC sampling value is less than the preset first threshold, if not, keep the supplementary light off, if yes, turn on the supplementary light;

[0055] When the supplementary light is turned on, it is judged whether each ADC sampling value is greater than the preset second threshold, if not, keep the supplementary light turned on, if yes, turn off the supplementary light; wherein, the first The threshold is less than ...

Embodiment 3

[0064] In order to make the control of turning off the fill light more accurate, on the basis of the above embodiments, in the embodiment of the present invention, before turning off the fill light, the method further includes:

[0065] Acquiring a second preset number of consecutive second images, and for each second image in the consecutive second images, determining the brightness of the second image according to the brightness value of each pixel in the second image Average value, according to the brightness average value of the second image, determine the first environmental reference brightness value of the second image; determine whether the first environmental reference brightness value of the second image is smaller than a predetermined second environmental reference brightness value;

[0066] If the first environment reference brightness value of each second image is smaller than the second environment reference brightness value, the step of turning off the fill light...

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Abstract

The invention discloses a supplementary light control method and device, the method comprising: acquiring a first preset number of continuous first images, and sampling by an analog-to-digital converter ADC outputted by a photosensitive resistor corresponding to each first image Value; determine whether each ADC sampling value obtained meets the preset conditions for changing the state of the fill light, if yes, change the current state of the fill light, if not, maintain the current state of the fill light. Since in the embodiment of the present invention, the ADC sampling values ​​corresponding to the first preset number of consecutive first images are obtained, when the continuous ADC sampling values ​​all meet the preset conditions for changing the state of the supplementary light, the supplementary light is changed. Otherwise, keep the current state of the fill light, so as to avoid the problem that the fill light is always on and off due to the large amount of light reflected by the reflector.

Description

technical field [0001] The invention relates to the technical field of video monitoring, in particular to a method and device for controlling a supplementary light. Background technique [0002] At present, the security industry has higher and higher requirements for the imaging quality of cameras in low-light scenes at night, and cameras with fill lights have appeared, which can effectively supplement the ambient brightness in low-light scenes and ensure the imaging quality of color images at night . [0003] However, when this type of camera with fill light faces some highly reflective scenes, the light of the fill light is reflected back to the camera by a large amount of reflective objects, and the photoresistor on the camera senses that the ambient brightness is very high, and the voltage signal rises. At this time, the scene is a daytime scene, and the camera responds by turning off the supplementary light; after turning off the supplementary light, the photoresistor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/235H04N7/18H05B47/11
CPCH04N7/18H05B47/10H04N23/74
Inventor 邵一轶卢二利陈明珠
Owner ZHEJIANG DAHUA TECH CO LTD
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