An Active Vision System for On-Line Traffic Sign Recognition

Jun MIURA  Tsuyoshi KANDA  Shusaku NAKATANI  Yoshiaki SHIRAI  

IEICE TRANSACTIONS on Information and Systems   Vol.E85-D   No.11   pp.1784-1792
Publication Date: 2002/11/01
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Issue on Information System Technologies for ITS)
traffic sign recognition,  active vision,  real-time vision,  ITS,  

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This paper presents an active vision system for on-line traffic sign recognition. The system is composed of two cameras, one is equipped with a wide-angle lens and the other with a telephoto lens, and a PC with an image processing board. The system first detects candidates for traffic signs in the wide-angle image using color, intensity, and shape information. For each candidate, the telephoto-camera is directed to its predicted position to capture the candidate in a larger size in the image. The recognition algorithm is designed by intensively using built-in functions of an off-the-shelf image processing board to realize both easy implementation and fast recognition. The results of on-road experiments show the feasibility of the system.