A Traffic Sign Detection Method Based on Adaptive Threshold

An adaptive threshold, traffic sign technology, applied in instruments, character and pattern recognition, computer parts and other directions, can solve problems such as low detection efficiency, inability to meet the detection rate requirements of traffic sign recognition systems, and affecting the performance of detection algorithms
CN104732211BActive Publication Date: 2017-12-08HANGZHOU DIANZI UNIV
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Patent Information

Authority / Receiving Office
CN Ā· China
Patent Type
Patents(China)
Current Assignee / Owner
HANGZHOU DIANZI UNIV
Publication Date
2017-12-08

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Abstract

The invention discloses a traffic sign detection method based on an adaptive threshold. The present invention first adopts the red and blue method to preprocess the image to obtain the red and blue gray scale image, and then performs multiple threshold value processing on the gray scale image. In each thresholding process, contour detection is performed on the binary image generated by the thresholding process; then, according to the shape characteristics of the traffic sign, geometric constraints and sign contour matching of Hu invariant moments are performed, and the current threshold image is obtained by filtering and screening. The set of suspected traffic sign areas; finally, the multiple thresholding results are combined, and the final traffic sign ROI is determined according to the frequency of detection of the outline area of ā€‹ā€‹the sign. The present invention enables the traffic sign candidate area in the image to obtain a better threshold processing effect, has the characteristics of threshold self-adaptation, not only has high detection efficiency and time performance, but also well solves the adaptability problem under different lighting conditions .
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Description

technical field

[0001] The invention belongs to the technical field of traffic sign recognition, and relates to an efficient traffic sign detection method in traffic sign recognition of vehicle-mounted video images, in particular to a traffic sign detection method based on an adaptive threshold. Background technique

[0002] With the rapid development of transportation, traffic safety is becoming more and more important. Subsystems such as pedestrian detection and traffic sign recognition in Advanced Driver Assistance Systems are important methods to reduce vehicle traffic accidents, and traffic sign detection is a key part of the traffic sign recognition system, which affects traffic sign recognition. The system recognizes the important factors of efficiency and real-time performance.

[0003] The traffic sign recognition system can be divided into two stages: detection and classification recognition. According to the different characteristics of traffic signs used, the de...

Claims

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