Abstract
Maintaining a database with the type, location, and direction of traffic signs is a labor-intensive part of asset management for many road authorities. Today there are high-quality cameras in cell-phones that can add location (EXIF) metadata to the images. This makes it efficient and cheap to collect large geo-located imagery datasets. Detecting traffic signs from imagery is also much simpler today due to the availability of several high-quality open-source object-detection solutions. In this paper, we use the detection of traffic signs to find both the location and the direction of physical traffic signs. Five approaches to cluster the detections are presented. An extensive experimental evaluation shows that it is important to consider both the location and the direction. The evaluation is done on a novel dataset with 21,565 images that is available free for download. This includes the ground-Truth location of 277 traffic signs and all source code. The conclusion is that traffic signs are detected with an F1 score of 0.8889, a location accuracy of 5.097-meter (MAE), and a direction accuracy of ± 11.375°(MAE). Only data from two trips are needed to get these results.
Original language | English |
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Title of host publication | Proceedings of 17th International Symposium on Spatial and Temporal Databases, SSTD 2021 |
Number of pages | 10 |
Publisher | Association for Computing Machinery |
Publication date | 23 Aug 2021 |
Pages | 34-43 |
ISBN (Electronic) | 9781450384254 |
DOIs | |
Publication status | Published - 23 Aug 2021 |
Event | 17th International Symposium on Spatial and Temporal Databases, SSTD 2021 - Virtual, Online, United States Duration: 23 Aug 2021 → 25 Aug 2021 |
Conference
Conference | 17th International Symposium on Spatial and Temporal Databases, SSTD 2021 |
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Country/Territory | United States |
City | Virtual, Online |
Period | 23/08/2021 → 25/08/2021 |
Bibliographical note
Publisher Copyright:© 2021 Owner/Author.
Keywords
- clustering
- GPS
- imagery
- traffic sign