Method for detecting round traffic sign

A technology for traffic signs and detection methods, which is applied to instruments, character and pattern recognition, computer parts, etc., can solve problems such as slow calculation speed, and achieve the effect of fast execution speed and increased accuracy

Active Publication Date: 2013-11-27
INST OF AUTOMATION CHINESE ACAD OF SCI
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Problems solved by technology

[0017] In order to solve the problem of slow calculation speed of color and shape classification methods, the present invention proposes a fast circular traffic sign detection method, inc

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  • Method for detecting round traffic sign
  • Method for detecting round traffic sign
  • Method for detecting round traffic sign

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0029] The invention discloses a circular traffic sign detection method used in the field of vehicle auxiliary driving or automatic driving. The present invention can obtain the position of the circular traffic sign from the image for subsequent content recognition of the traffic sign. The invention takes the image sensor installed above the vehicle as the information acquisition source, and uses the method based on image segmentation and shape matching to detect the circular traffic sign. The invention includes a method for generating color classification templates based on spatial distance before detection, an image segmentation method during detection, and a traffic sign detection method for circular matching, wherein ...

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Abstract

The invention discloses a method for detecting a round traffic sign. The method comprises the steps that S1, sample point division is conducted on color samples according to illumination components to acquire sample subsets, and corresponding color classification templates of the sample subsets are generated after division is conducted; S2, an original image is cut through the color classification templates; S3, two-level shape matching operation is conducted on the shape of each single-communication region in the cut image and the shape of the round traffic sign. According to the method, the spatial distance method that the color classification templates are generated by the color sample points is used for image cutting; the round traffic sign is fast positioned regarding to a non-shielding two-level shape matching system and a shielding two-level shape matching system; the calculated amount of color classification is transferred to a color template generation stage before detection from a detection stage, and color classification precision can be improved through increase of the templates. According to the method, detection can be finished through the partially shielded two-level round shape matching system.

Description

technical field [0001] The invention relates to the technical field of vehicle assisted driving, in particular to a fast circular traffic sign detection method for a real-time system. Background technique [0002] Traffic signs are facilities that convey information to road users in color, shape, characters, graphics, etc., and are used to manage traffic, and play an important role in traffic. [0003] According to their functions, traffic signs are divided into two categories: main signs and auxiliary signs. [0004] Primary signs include: [0005] 1. Warning signs: signs that warn vehicles and pedestrians to pay attention to road traffic; mostly yellow triangles; [0006] 2. Prohibition signs: signs that prohibit or restrict traffic behavior of vehicles and pedestrians; mostly red circles; [0007] 3. Instruction signs: signs indicating that vehicles and pedestrians should follow; most of them are blue circles; [0008] 4. Guidance sign: a sign that conveys road direct...

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Application Information

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IPC IPC(8): G06K9/00G06K9/34
Inventor 汤淑明孙涛
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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