CLC number:
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2023-03-17
Cited: 0
Clicked: 1636
Zonghan MU, Yong QIN, Chongchong YU, Yunpeng WU, Zhipeng WANG, Huaizhi YANG, Yonghui HUANG. Adaptive cropping shallow attention network for defect detection of bridge girder steel using unmanned aerial vehicle images[J]. Journal of Zhejiang University Science A, 2023, 24(3): 243-256.
@article{title="Adaptive cropping shallow attention network for defect detection of bridge girder steel using unmanned aerial vehicle images",
author="Zonghan MU, Yong QIN, Chongchong YU, Yunpeng WU, Zhipeng WANG, Huaizhi YANG, Yonghui HUANG",
journal="Journal of Zhejiang University Science A",
volume="24",
number="3",
pages="243-256",
year="2023",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2200175"
}
%0 Journal Article
%T Adaptive cropping shallow attention network for defect detection of bridge girder steel using unmanned aerial vehicle images
%A Zonghan MU
%A Yong QIN
%A Chongchong YU
%A Yunpeng WU
%A Zhipeng WANG
%A Huaizhi YANG
%A Yonghui HUANG
%J Journal of Zhejiang University SCIENCE A
%V 24
%N 3
%P 243-256
%@ 1673-565X
%D 2023
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2200175
TY - JOUR
T1 - Adaptive cropping shallow attention network for defect detection of bridge girder steel using unmanned aerial vehicle images
A1 - Zonghan MU
A1 - Yong QIN
A1 - Chongchong YU
A1 - Yunpeng WU
A1 - Zhipeng WANG
A1 - Huaizhi YANG
A1 - Yonghui HUANG
J0 - Journal of Zhejiang University Science A
VL - 24
IS - 3
SP - 243
EP - 256
%@ 1673-565X
Y1 - 2023
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2200175
Abstract: bridges are an important part of railway infrastructure and need regular inspection and maintenance. Using unmanned aerial vehicle (UAV) technology to inspect railway infrastructure is an active research issue. However, due to the large size of UAV images, flight distance, and height changes, the object scale changes dramatically. At the same time, the elements of interest in railway bridges, such as bolts and corrosion, are small and dense objects, and the sample data set is seriously unbalanced, posing great challenges to the accurate detection of defects. In this paper, an adaptive cropping shallow attention network (ACSANet) is proposed, which includes an adaptive cropping strategy for large UAV images and a shallow attention network for small object detection in limited samples. To enhance the accuracy and generalization of the model, the shallow attention network model integrates a coordinate attention (CA) mechanism module and an alpha intersection over union (α-IOU) loss function, and then carries out defect detection on the bolts, steel surfaces, and railings of railway bridges. The test results show that the ACSANet model outperforms the YOLOv5s model using adaptive cropping strategy in terms of the total mAP (an evaluation index) and missing bolt mAP by 5% and 30%, respectively. Also, compared with the YOLOv5s model that adopts the common cropping strategy, the total mAP and missing bolt mAP are improved by 10% and 60%, respectively. Compared with the YOLOv5s model without any cropping strategy, the total mAP and missing bolt mAP are improved by 40% and 67%, respectively.
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