High-performance Chinese multiclass traffic sign detection via coarse-to-fine cascade and parallel support vector machine detectors

Faliang Chang; Chunsheng Liu

doi:10.1117/1.JEI.26.5.053020

12 October 2017 High-performance Chinese multiclass traffic sign detection via coarse-to-fine cascade and parallel support vector machine detectors

Faliang Chang, Chunsheng Liu

Author Affiliations +

Journal of Electronic Imaging, Vol. 26, Issue 5, 053020 (October 2017). https://doi.org/10.1117/1.JEI.26.5.053020

Abstract

The high variability of sign colors and shapes in uncontrolled environments has made the detection of traffic signs a challenging problem in computer vision. We propose a traffic sign detection (TSD) method based on coarse-to-fine cascade and parallel support vector machine (SVM) detectors to detect Chinese warning and danger traffic signs. First, a region of interest (ROI) extraction method is proposed to extract ROIs using color contrast features in local regions. The ROI extraction can reduce scanning regions and save detection time. For multiclass TSD, we propose a structure that combines a coarse-to-fine cascaded tree with a parallel structure of histogram of oriented gradients (HOG) + SVM detectors. The cascaded tree is designed to detect different types of traffic signs in a coarse-to-fine process. The parallel HOG + SVM detectors are designed to do fine detection of different types of traffic signs. The experiments demonstrate the proposed TSD method can rapidly detect multiclass traffic signs with different colors and shapes in high accuracy.

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Faliang Chang and Chunsheng Liu "High-performance Chinese multiclass traffic sign detection via coarse-to-fine cascade and parallel support vector machine detectors," Journal of Electronic Imaging 26(5), 053020 (12 October 2017). https://doi.org/10.1117/1.JEI.26.5.053020

Received: 21 June 2017; Accepted: 21 September 2017; Published: 12 October 2017

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KEYWORDS

Sensors

Image enhancement

Image processing

Feature extraction

RGB color model

Computer vision technology

Detection and tracking algorithms

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