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A method for automatic detection and recognition of road traffic signs

A technology of automatic detection and recognition method, applied in character and pattern recognition, instrument, calculation and other directions, can solve problems such as large amount of calculation, imbalance, affecting the performance of classifiers, etc.

Active Publication Date: 2020-07-31
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] The above-mentioned methods to achieve multi-classification have their advantages and disadvantages. The problem of the direct method is mainly to solve the optimal solution of multiple planes at one time, which leads to a large amount of calculation and can only be used in small projects.
However, the "one-class-to-remainder method" will inevitably produce a data set skew problem (positive and negative samples are seriously unbalanced) during the training process, which is the situation that most affects the performance of the trained classifier.

Method used

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  • A method for automatic detection and recognition of road traffic signs
  • A method for automatic detection and recognition of road traffic signs
  • A method for automatic detection and recognition of road traffic signs

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Experimental program
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Embodiment 1

[0171] A method for automatic detection and recognition of road traffic signs, realized based on an automatic detection and recognition system, the automatic detection and recognition system comprising, a traffic sign collection module, a traffic sign detection processing module and a traffic sign recognition module (the automatic detection and recognition system is based on a PC The hardware system of machine); Described road traffic sign automatic detection recognition method comprises steps as follows:

[0172] 1) The traffic sign collection module collects images above the road and on both sides of the road in the driving environment;

[0173] 2) The traffic sign detection processing module processes the image collected in step 1):

[0174] 2.1) using a bilinear interpolation algorithm to scale the image collected in step 1) to a uniform resolution size to obtain a second traffic environment image;

[0175] 2.2) performing branch processing on the second traffic environme...

Embodiment 2

[0228] As in the method for automatic detection and recognition of road traffic signs described in Embodiment 1, the difference is that the program of the traffic sign detection processing module runs in an image processor.

Embodiment 3

[0230] The road traffic sign automatic detection and recognition method as described in embodiment 2, the difference is that in the step 1), the traffic sign acquisition module captures images of the road above and both sides of the road in the driving environment in real time through the vehicle-mounted camera And store it in the memory for the image processor to read; the image acquisition rate of the vehicle-mounted camera is 30 frames per second; a software timer is set in the image processor, and the image information in the memory is read at an interval of t, t=30ms.

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Abstract

The invention relates to a method for automatic detection and recognition of road traffic signs. The present invention is realized based on an automatic detection and recognition system, and the automatic detection and recognition system includes a traffic sign collection module, a traffic sign detection and processing module and a traffic sign recognition module. The traffic sign collection module is used to collect driving video, and the traffic sign detection processing module processes the collected video, detects image frames containing traffic signs, and extracts regions of interest. The traffic sign recognition module is used to classify and recognize the extracted ROI images. The road traffic sign automatic detection and recognition method of the present invention has many types of traffic signs, high precision, high recognition accuracy, and good robustness; and effectively reduces the influence of illumination, geometric deformation, rotation, etc., and has high anti-interference ability.

Description

technical field [0001] The invention relates to a method for automatic detection and recognition of road traffic signs, which belongs to the technical field of environment perception assisted driving. Background technique [0002] With the continuous progress of society and economy, the construction of my country's road traffic network has been continuously and rapidly developed, the number of cars has increased, and the road traffic situation has become more and more complicated. Today, there are many types and quantities of traffic signs on or on the sides of the road. While the driver is concentrating on driving the car, he must also pay attention to various traffic signs set on the road, which puts forward higher requirements for the driver. For novices with unskilled driving skills, they often ignore traffic signs and cause illegal driving. Therefore, designing an automatic detection and recognition system for road traffic signs is of great significance for assisting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/62
CPCG06V20/582G06F18/2411G06F18/214
Inventor 田存伟陶承阳于会山黄慧郭生权
Owner LIAOCHENG UNIV