Bounding Box Accuracy in Pedestrian Detection for Intelligent Transportation Systems

Llorca, David F.; Parra, Ignacio; Sotelo, Miguel Ángel; Revenga, Pedro
Year: 2006
Type of Publication: In Proceedings
Keywords: SVM-based classifier; bounding box accuracy; feature extraction methods; intelligent transportation systems; multicandidate generation mechanism; stereo-vision-based pedestrian detection; subtractive clustering attention mechanism; automated highways; feature ext
Book title: IEEE Industrial Electronics, IECON 2006 - 32nd Annual Conference on
Pages: 3486 -3491
Month: nov.
ISSN: 1553-572X
DOI: 10.1109/IECON.2006.347744
This paper describes a stereo-vision-based pedestrian detection system for intelligent transportation systems. The basic components of pedestrians are first located in the image and then combined with a SVM-based classifier. Generic obstacles are located using a subtractive clustering attention mechanism based on stereo vision. A by-components learning approach is proposed and different feature extraction methods are tested in order to better deal with pedestrian variability and justify what features are better to be learnt for pedestrian detection. Candidate selection mechanisms usually yield pedestrians with inaccurate bounding boxes. Then a decrease in detection rate takes place if the SVM classifier is trained only with well-fitted pedestrians. Using several off-line databases containing thousands of pedestrians samples the effect of bounding box accuracy is studied. A multi-candidate generation mechanism is also developed in order to enhance the single frame performance, decreasing the number of false positives due to inaccurate bounding boxes
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