Ms. Quanyu Wang Profile

Quanyu Wang

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Proceedings Article | 23 November 2022 Paper

Traffic sign detection based on improved YOLOv5

Mingkui Zhang, Quanyu Wang

Proceedings Volume 12454, 124540Y (2022) https://doi.org/10.1117/12.2659125

KEYWORDS: Target detection, Detection and tracking algorithms, Feature extraction, Target recognition, Image processing

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Aiming at the problems of locating and identifying impediment for minor targets as well as unpromising detection accuracy, a traffic sign detection algorithm based on improved YOLOv5 is propounded in this paper. First, the Addition of the Coordinate Attention Mechanism module behind the backbone network enables the model to effectively capture the relationship between location information and channels, thereby more accurately locates the area of interest. Then a detection layer is introduced into the network structure, and the feature map is continued to be upsampled after the 17th layer of the original algorithm network structure, so that the feature map continues to expand, and a feature map of 160 *160 size is obtained at the 19th layer and the feature map of the second layer of the backbone network is spliced and integrated. This results in a larger feature map for the detection of small targets. Finally, α -CIoU loss is used to replace the original CIoU positioning loss function in the model training stage to obtain higher quality anchor frame. Experiments are performed on the TT100K dataset, compared to the original YOLOv5 algorithm, the proposed algorithm improves accuracy by 3.9%, recall rate by 5.5% and mAP by 4.6% under the premise of less speed reduction, which still meets the requirements of real-time detection.

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