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Atmospheric visibility monitoring method and device

A technology of atmospheric visibility and atmospheric light value, applied in the field of communication, can solve problems such as inability to monitor around the clock, difficult maintenance, and high price

Active Publication Date: 2015-05-20
CHINA TELECOM CORP LTD
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  • Summary
  • 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

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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 of the embodiments of the present invention, not all of them. 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 co...

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Abstract

The invention discloses an atmospheric visibility monitoring method and device. In the monitoring method, the video images took by a camera are received and used to determine the atmospheric light value of a green dark channel and recognize the red-blue card areas in the video images; in the recognized red-blue card areas, a pixel (p) is selected for monitoring, the brightness value and atmospheric light value of a pixel responding to the pixel (p) in the green dark channel are utilized to calculate the atmospheric transmission coefficient; the atmospheric transmission coefficient and corresponding distance information are used to calculate the atmospheric extinction coefficient, and finally the atmospheric visibility of the position where the camera took the pictures can be determined according to the atmospheric extinction coefficient. The provided method and device can effectively monitor the atmospheric visibility by using existed monitor cameras without installing any expensive visibility instrument.

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...

Claims

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Application Information

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