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Real-Time Detection and Recognition of Road Traffic Signs

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2 Author(s)
Jack Greenhalgh ; Visual Information Laboratory, University of Bristol, Bristol , U.K. ; Majid Mirmehdi

This paper proposes a novel system for the automatic detection and recognition of traffic signs. The proposed system detects candidate regions as maximally stable extremal regions (MSERs), which offers robustness to variations in lighting conditions. Recognition is based on a cascade of support vector machine (SVM) classifiers that were trained using histogram of oriented gradient (HOG) features. The training data are generated from synthetic template images that are freely available from an online database; thus, real footage road signs are not required as training data. The proposed system is accurate at high vehicle speeds, operates under a range of weather conditions, runs at an average speed of 20 frames per second, and recognizes all classes of ideogram-based (nontext) traffic symbols from an online road sign database. Comprehensive comparative results to illustrate the performance of the system are presented.

Published in:

IEEE Transactions on Intelligent Transportation Systems  (Volume:13 ,  Issue: 4 )