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A method for locating traffic lights

A positioning method and traffic light technology, applied in traffic control systems, traffic flow detection, traffic control systems of road vehicles, etc., can solve problems such as accuracy reduction and failure

Active Publication Date: 2017-02-22
宁波中国科学院信息技术应用研究院 +1
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Problems solved by technology

[0004] At present, the traffic light recognition method adopted by the video surveillance system fixed at the traffic intersection is based on the premise of accurate traffic light positioning, and when the position of the traffic light in the video image shakes or shifts, this traffic light recognition method The accuracy rate will be greatly reduced or even completely invalid

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Embodiment Construction

[0049] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0050] A traffic light positioning method proposed by the present invention, its overall realization block diagram is as follows figure 1 As shown, it includes the following steps:

[0051] ① Define the smallest rectangular area where the traffic light is located in the nth frame of the intersection image currently to be processed in the traffic intersection monitoring video acquired in real time as the current target area, denoted as CT n ; put CT n The position in the intersection image of the nth frame is represented by CT n The coordinate position of the upper left corner pixel point in the intersection image of the nth frame is expressed as (x w ,y w ); and CT n The area of ​​is denoted as A light , A light =X×Y; Wherein, the initial value of n is 0, 0≤n≤N-1, and N represents the total frame number of the intersection image that co...

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Abstract

The invention discloses a traffic light positioning method, which expands the target area where the traffic light is located in advance, obtains the restricted area, performs binarization on the grayscale image of the restricted area, and extracts the area of ​​the bright area from the binarized image. The proportion, the number of small-area bright areas, the number of standard light area bright areas, the number of large-area bright areas, and the average gray value of dark areas, according to these features, the intersection image where the target area is located is judged day and night. If it is a night image , then use the binarized image to detect the signal light whose state is "bright", and adjust the position of the traffic light according to the position of the signal light; The position of the frame realizes the adjustment of the position of traffic lights; the advantages are low computational complexity, fast calculation speed, strong environmental adaptability, and simple implementation.

Description

technical field [0001] The invention relates to a computer vision recognition technology, in particular to a traffic light positioning method. Background technique [0002] With the progress of society and the development of economy, the intelligent transportation system formed by introducing pattern recognition and electronic information technology has attracted the general attention of governments and transportation departments of various countries. The recognition of traffic signs is an important part of the intelligent transportation system and an important academic branch of machine learning research, which involves many technical fields such as pattern recognition, image processing, digital signal processing, artificial intelligence, communication technology and information theory. At present, the identification of the status of traffic lights mainly relies on the video surveillance system installed at traffic intersections to obtain information such as whether the veh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/01G06K9/46
CPCG08G1/0175G06V20/40
Inventor 陈辰黄晁张从连袁小平戎鲁凯
Owner 宁波中国科学院信息技术应用研究院
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