DocumentCode :
1221598
Title :
Real-Time Speed Sign Detection Using the Radial Symmetry Detector
Author :
Barnes, Nick ; Zelinsky, Alexander ; Fletcher, Luke S.
Author_Institution :
Nat. ICT Australia, Canberra, ACT
Volume :
9
Issue :
2
fYear :
2008
fDate :
6/1/2008 12:00:00 AM
Firstpage :
322
Lastpage :
332
Abstract :
Algorithms for classifying road signs have a high computational cost per pixel processed. A detection stage that has a lower computational cost can facilitate real-time processing. Various authors have used shape and color-based detectors. Shape-based detectors have an advantage under variable lighting conditions and sign deterioration that, although the apparent color may change, the shape is preserved. In this paper, we present the radial symmetry detector for detecting speed signs. We evaluate the detector itself in a system that is mounted within a road vehicle. We also evaluate its performance that is integrated with classification over a series of sequences from roads around Canberra and demonstrate it while running online in our road vehicle. We show that it can detect signs with high reliability in real time. We examine the internal parameters of the algorithm to adapt it to road sign detection. We demonstrate the stability of the system under the variation of these parameters and show computational speed gains through their tuning. The detector is demonstrated to work under a wide variety of visual conditions.
Keywords :
object detection; road safety; road vehicles; traffic engineering computing; radial symmetry detector; real-time speed sign detection; road signs; road vehicle; shape-based detectors; sign deterioration; Detection; fast radial symmetry; real time; road sign;
fLanguage :
English
Journal_Title :
Intelligent Transportation Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
1524-9050
Type :
jour
DOI :
10.1109/TITS.2008.922935
Filename :
4523929
Link To Document :
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