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Computational Visual Media 2018, 4(3): 253-266 https://doi.org/10.1007/s41095-018-0116-x
Research Article | Open Access | Issue | Published: 04 August 2018

Traffic signal detection and classification in street views using an attention model

Show Author's Information Yifan Lu1,  Jiaming Lu1( ),  Songhai Zhang1,  Peter Hall2
TNList, Tsinghua University, Beijing 100084, China.
Department of Computer Science, University of Bath, United Kingdom.
Keywords:
Keywords  traffic light detection, traffic light benchmark, small object detection, CNN
Cite this article:
Lu Y, Lu J, Zhang S, et al. Traffic signal detection and classification in street views using an attention model. Computational Visual Media, 2018, 4(3): 253-266. https://doi.org/10.1007/s41095-018-0116-x
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Abstract Full text About this article

Abstract  Detecting small objects is a challenging task. We focus on a special case: the detection and classification of traffic signals in street views. We present a novel framework that utilizes a visual attention model to make detection more efficient, without loss of accuracy, and which generalizes. The attention model is designed to generate a small set of candidate regions at a suitable scale so that small targets can be better located and classified. In order to evaluate our method in the context of traffic signal detection, we have built a traffic light benchmark with over 15,000 traffic light instances, based on Tencent street view panoramas. We have tested our method both on the dataset we have built and the Tsinghua–Tencent 100K (TT100K) traffic sign benchmark. Experiments show that our method has superior detection performance and is quicker than the general faster RCNN object detection framework on both datasets. It is competitive with state-of-the-art specialist traffic sign detectors on TT100K, but is an order of magnitude faster. To show generality, we tested it on the LISA dataset without tuning, and obtained an average precision in excess of 90%.


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About this article

Traffic signal detection and classification in street views using an attention model

Show Author's information Yifan Lu1, Jiaming Lu1( ), Songhai Zhang1, Peter Hall2
TNList, Tsinghua University, Beijing 100084, China.
Department of Computer Science, University of Bath, United Kingdom.

Abstract

Abstract  Detecting small objects is a challenging task. We focus on a special case: the detection and classification of traffic signals in street views. We present a novel framework that utilizes a visual attention model to make detection more efficient, without loss of accuracy, and which generalizes. The attention model is designed to generate a small set of candidate regions at a suitable scale so that small targets can be better located and classified. In order to evaluate our method in the context of traffic signal detection, we have built a traffic light benchmark with over 15,000 traffic light instances, based on Tencent street view panoramas. We have tested our method both on the dataset we have built and the Tsinghua–Tencent 100K (TT100K) traffic sign benchmark. Experiments show that our method has superior detection performance and is quicker than the general faster RCNN object detection framework on both datasets. It is competitive with state-of-the-art specialist traffic sign detectors on TT100K, but is an order of magnitude faster. To show generality, we tested it on the LISA dataset without tuning, and obtained an average precision in excess of 90%.

Keywords: Keywords  traffic light detection, traffic light benchmark, small object detection, CNN

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Publication history

Revised: 09 March 2018
Accepted: 07 April 2018
Published: 04 August 2018
Issue date: September 2018

Copyright

© The Author(s) 2018

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 61772298), Research Grant of Beijing Higher Institution Engineering Research Center, and the Tsinghua–Tencent Joint Laboratory for Internet Innovation Technology.

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