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Atmospheric visibility monitoring method and device

A technology of atmospheric visibility and atmospheric light value, which is applied in the field of communication and can solve the problems of inability to monitor all-weather, high price, and difficult maintenance.

Active Publication Date: 2018-01-05
CHINA TELECOM CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the visual inspection method is more affected by subjective factors and cannot be monitored around the clock
[0006] The instrumental method is a method of monitoring atmospheric visibility by using transmission type, scattering type and laser radar measuring instruments, but it is subject to high price, difficult maintenance and disadvantages.

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  • Atmospheric visibility monitoring method and device
  • Atmospheric visibility monitoring method and device
  • Atmospheric visibility monitoring method and device

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Embodiment Construction

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0056] The relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0057] At the same time, it should be understood that, for the convenience of d...

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Abstract

The invention discloses a method and a device for monitoring atmospheric visibility. Among them, in the atmospheric visibility monitoring method, the video image captured by the camera is received, the atmospheric light value on the green dark channel is determined using the video image, and the red and blue card areas in the video image are identified. In the identified red and blue card areas, select For the pixel point p used for monitoring, use the brightness value and atmospheric light value of the pixel point corresponding to the pixel point p in the green dark channel to calculate the atmospheric transmission coefficient, use the atmospheric transmission coefficient and the corresponding distance information to calculate the atmospheric extinction coefficient, according to the atmospheric The extinction coefficient determines the atmospheric visibility value at the camera point where the video image was captured. Therefore, the effective monitoring of atmospheric visibility can be realized by using the existing surveillance cameras without deploying expensive visibility instruments.

Description

technical field [0001] The invention relates to the field of communications, in particular to a method and device for monitoring atmospheric visibility. Background technique [0002] Atmospheric visibility is an index reflecting the transparency of the atmosphere. It is generally defined as the maximum ground horizontal distance that a person with normal eyesight can see clearly the outline of the target under the weather conditions at that time. It is closely related to people's production and life, especially an important factor affecting road traffic safety. Due to the uncertainty of rain and fog weather, it is particularly important to monitor atmospheric visibility in some urban roads and densely populated areas. [0003] In addition, with the construction of monitoring systems in safe cities and other cities, the current monitoring points in cities are densely distributed. Combining existing video monitoring points with atmospheric visibility monitoring will help guid...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/85
Inventor 胡豆豆许正锋张园
Owner CHINA TELECOM CORP LTD
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