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Academic Journal of Engineering and Technology Science, 2024, 7(3); doi: 10.25236/AJETS.2024.070303.

LPD-YOLO: A Lightweight License Plate Detection Method with Strong Generalization Ability

Author(s)

Junhua Xu1, Jiawei Luo1, Jintu Wei1, Yiwen Luo1, Minhua Ye2, Junpeng Tang1, Ruihan Chen1, Xuewen Chen1, Di Ning3, Zhi Li1

Corresponding Author:
Zhi Li
Affiliation(s)

1School of Mathematics and Computer, Guangdong Ocean University, Zhanjiang, 524088, China

2College of Ocean Engineering and Energy, Guangdong Ocean University, Zhanjiang, 524088, China

3School of Economics, Guangdong Ocean University, Zhanjiang, 524088, China

Abstract

To detect common types of license plate, this paper proposes the LPD-YOLO algorithm based on YOLOv7 for license plate classification detection. The LPD -YOLO algorithm adopts the Content-Aware Reassembly of Features (CARAFE) upsampling operator to replace the nearest-neighbor interpolation method in YOLOv7, thereby improving the accuracy of object detection. Additionally, it introduces the Distribution Shifting Convolution (DSConv) module to replace some traditional convolutions in the YOLOv7 head network, achieving model lightweighting. Experimental results show that the LPD-YOLO algorithm achieves an mAP value of 91.72%, with a model computation of only 96G. This method features high accuracy and robustness, making it highly valuable in practical scenarios for license plate classification detection.

Keywords

Deep learning, License plate detection, YOLOv7, CARAFE, DSConv

Cite This Paper

Junhua Xu, Jiawei Luo, Jintu Wei, Yiwen Luo, Minhua Ye, Junpeng Tang, Ruihan Chen, Xuewen Chen, Di Ning, Zhi Li. LPD-YOLO: A Lightweight License Plate Detection Method with Strong Generalization Ability. Academic Journal of Engineering and Technology Science (2024) Vol. 7, Issue 3: 12-16. https://doi.org/10.25236/AJETS.2024.070303.

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