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Method and apparatus for automatic identification of traffic lights

A technology of automatic identification and traffic lights, applied in the field of intelligent transportation, can solve problems such as equipment installation and maintenance difficulties, and achieve the effect of low cost

Active Publication Date: 2012-09-12
中盟科技有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The main purpose of the present invention is to provide a method for automatically identifying traffic lights, aiming to solve the technical problem of difficult equipment installation and maintenance in the prior art

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  • Method and apparatus for automatic identification of traffic lights
  • Method and apparatus for automatic identification of traffic lights

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Embodiment Construction

[0030] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] refer to figure 1 , figure 1 It is a flowchart of an embodiment of the method for automatically identifying traffic lights in the present invention. Such as figure 1 As shown, the process includes the following steps:

[0032] Step S10, initializing the mean and variance of the three colors red, green and yellow in the intuitive color model HSV space; HSV space is the most commonly used color space for histograms. Its three components represent Hue, Saturation and Value respectively.

[0033] Step S20, designate the area where the signal light is located; since the position of the signal light in the image is relatively fixed, specifying the area can speed up the algorithm and avoid full-image search. In the embodiment of the present invention, the rectangular area where the signal light is located can be ...

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Abstract

The invention discloses a method for automatic identification of traffic lights, comprising the following steps of: initializing mean values and variances of the three colors red, green and yellow in HSV space; designating an area where the traffic lights are located; converting an input image from an RGB space to the HSV space; extracting the traffic light latent area, performing mathematical morphological treatment for the image and obtaining the distribution characteristics of chroma components of the traffic lights area; combining Gauss model with expectation maximization algorithm to determine mean values, variances and weight of the three Gauss models corresponding to the three colours according to the distribution characteristics of chroma components of the traffic lights area; calculating the probability of each point in traffic lights latent area belonging to the three colours according to the mean values, variances and weight of the three Gauss models, taking the colour with the maximum probability as the colour of current point and recording it; and counting the colour ratio of all pixel points in a certain connected domain, and taking the colour with the maximum ratio as the colour of the domain. The method can reduce difficulties in installation and maintenance.

Description

technical field [0001] The invention belongs to the field of intelligent transportation, in particular to a method and device for automatically identifying traffic lights. Background technique [0002] In coil-based electronic police, the status of traffic lights is mainly obtained through intersection signals. This method has the characteristics of accuracy and stability. However, with the widespread application of video-based electronic police equipment, the method of obtaining traffic light status through signal machines has problems such as difficult installation and maintenance of equipment, poor system compatibility, and relatively high system costs. Contents of the invention [0003] The main purpose of the present invention is to provide a method for automatically identifying traffic lights, aiming to solve the technical problem of difficult equipment installation and maintenance in the prior art. [0004] In order to achieve the purpose of the invention, the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06T7/00
Inventor 吴海东王翔鹰佘中华
Owner 中盟科技有限公司
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