General Hough transformation-based method for detecting position of traffic signal lamp

A generalized Hough transform, traffic signal technology, applied in the field of traffic signal position detection in video images, can solve the problems of lack of practicability and unsatisfactory accuracy.

Active Publication Date: 2012-02-15
FUDAN UNIV
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Problems solved by technology

These methods are very good at solving the factors of color instability. However, because standard two-dimensional geometric figures are used to describe the traffic light model, this is quite different from the traffic light imaging result

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  • General Hough transformation-based method for detecting position of traffic signal lamp
  • General Hough transformation-based method for detecting position of traffic signal lamp
  • General Hough transformation-based method for detecting position of traffic signal lamp

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[0048] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0049] figure 1 The flow chart of the traffic light position detection algorithm based on the generalized Hough transform is given. The partial image of the traffic light is used as the template, and the image sequence to be detected is used as the input. The specific steps are as follows:

[0050] 1. First convert the image to be detected and the template image into a grayscale image, using formula (10).

[0051] 2. Use the canny operator [8] to obtain the grayscale image in and The derivative of the direction, and then calculate the gradient size and direction of the grayscale image acc...

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Abstract

The invention belongs to the technical field of digital image processing and pattern recognition and discloses a general Hough transformation-based method for detecting the position of a traffic signal lamp, which comprises the following steps: by taking an image sequence as input, calculating image gradient information by adopting a first-order differential operator on an image by using image gradation; establishing a traffic lamp shape describing function; defining mapping from an image point to the space of an accumulator; and searching the extreme value of the space of the accumulator to acquire the coordinates of the traffic lamp to provide positional information for traffic lamp state identification. The general Hough transformation-based method for detecting the position of the traffic signal lamp can cope with the significant change of illumination, is insensitive to the influence caused by image sampling color cast and can cope with the traffic lamp with various common shapes.

Description

technical field [0001] The invention belongs to the technical field of digital image processing and pattern recognition, in particular to a method for detecting the position of a traffic signal light in a video image. technical background [0002] With the continuous development of the economy, the urban population and the number of motor vehicles are increasing rapidly. The incidence of traffic accidents and the number of deaths due to traffic accidents every year are very alarming. One of the important reasons is that motor vehicle drivers drive illegally outside the sight of the traffic police. The situation is very common. In order to manage traffic more extensively and provide traffic police with off-site law enforcement capabilities, the electronic police system has emerged as an important component of the Intelligent Transportation System (Intelligent Transportation System). It realizes all-weather and large-scale management requirements for urban roads, and at the s...

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Application Information

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IPC IPC(8): G08G1/097G06K9/00
Inventor 鲁帅冯瑞金城薛向阳
Owner FUDAN UNIV
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