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
CN104634784AActive Publication Date: 2015-05-20CHINA TELECOM CORP LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA TELECOM CORP LTD
Publication Date
2015-05-20

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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.
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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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