Method for detecting round traffic sign

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...

AI Technical Summary

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, including color classification template generation based on spatial distance before detection and image segmentation and circle matching. The steps of traffic sign detection are as follows:

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