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A method for detecting ambient light of a security monitoring camera

A technology for ambient light detection and security monitoring, used in image communication, TV, color TV components, etc.

Active Publication Date: 2020-05-12
TIANJIN TIANDI WEIYE INFORMATION SYST INTEGRATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention aims to propose a method for detecting ambient light of a security monitoring camera to solve the requirement of the security monitoring camera for low-light environment detection

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  • A method for detecting ambient light of a security monitoring camera
  • A method for detecting ambient light of a security monitoring camera
  • A method for detecting ambient light of a security monitoring camera

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Embodiment Construction

[0024] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0026] Such as figure 1 Shown light-sensitive photocurrent curve; Ambient light lower than 1lux is a non-linear curve, which can easily cause inaccurate detection. The technical scheme adopted in the present invention is as follows: figure 2 As shown, through the photosensitive plus Sensor exposure detection scheme, combined detection of ambient light, (the combination method is to read the illuminance value through the exposure of the camera’s Sensor during the day, and then use the photosensitive detection of the camera to detect the ambient light after converting to black and white) to solve the inaccurate low illumination, The single scheme is unstable. By using the Sensor exposure...

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Abstract

The invention provides a method for detecting ambient light of a security monitoring camera, which specifically includes the following steps: (1) detecting the ambient illuminance through the sensor exposure of the camera, and judging whether it is less than the set illuminance value; (2) turning on the infrared light if the set illuminance value is less than the set illuminance value Carry out supplementary light; (3) detect the ambient illuminance through the photosensitivity of the camera, and judge whether it is greater than the set illuminance value; (4) turn off the infrared light if it is greater than the set illuminance value. The present invention uses a photosensitive plus Sensor exposure detection scheme to combine detection of ambient light, read the illuminance value through the exposure of the camera’s Sensor during the day, and detect the ambient light intensity through the photosensitive camera after converting to black and white, so as to solve the problems of inaccurate low illumination and unstable single scheme.

Description

technical field [0001] The invention belongs to the technical field of security monitoring, and in particular relates to a method for detecting ambient light of a security monitoring camera. Background technique [0002] With the rapid development of physical network technology, more and more security monitoring products have appeared in people's lives, bringing more and more convenience to people's lives. The traditional camera's light detection of the surrounding environment is generally An ambient brightness sensor is added, but the single ambient light detection method is inaccurate. The single use of photosensitive detection has the advantage that it is not affected by infrared light. The disadvantage: it is not sensitive to low-light detection, and the detection accuracy is not enough for ambient light below 1lux; single use of Sensor Exposure detection, advantages: accurate detection, can detect ambient light below 1lux, disadvantages are easily affected by infrared l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/235
CPCH04N23/71H04N23/70H04N23/74
Inventor 王思俊刘琰瞿关明王玉喜
Owner TIANJIN TIANDI WEIYE INFORMATION SYST INTEGRATION CO LTD