A Real-time LPR Deployment Scheme on Edge Devices via INT8 Quantization and TensorRT Optimization

作者

  • Xi Chen Chongqing Jianzhu College 作者
  • Jiajia Chen Chongqing Jianzhu College 作者

DOI:

https://doi.org/10.65455/nygma907

关键词:

License Plate Recognition (LPR), YOLOV5, Edge Computing, INT8 Quantization

摘要

Real-time license plate recognition (LPR) on edge devices is heavily constrained by hardware limits. This study focuses on the efficient deployment of a real-time Chinese license plate recognition system, which plays a crucial role in intelligent traffic management and automated toll collection. Despite substantial progress in artificial intelligence and deep learning algorithms, achieving real-time performance remains a challenge because of the limited computational resources of practical hardware platforms. To overcome this limitation, a two-stage model optimization approach is proposed and integrated with NVIDIA deployment toolkits to accelerate inference with only marginal accuracy loss. The proposed work delivers a high-performance license plate recognition system and demonstrates that hardware-aware model optimization is essential for achieving efficient and practical real-time deployment.

参考

[1]LAROCA R, SEVERO E, ZANLORENSI L A, et al. A robust real-time automatic license plate recognition based on the YOLO detector//International Joint Conference on Neural Networks. Rio de Janeiro, Brazil: IEEE, 2018: 1-10. DOI: https://doi.org/10.1109/IJCNN.2018.8489629

[2]MASOOD S Z, SHU G, DEHGHAN A, et al. License plate detection and recognition using deeply learned convolutional neural networks [Z/OL]. arXiv:1703.07330, 2017. https://arxiv.org/abs/1703.07330.

[3]LI H, WANG P, SHEN C. Towards end-to-end car license plate detection and recognition with deep neural networks. IEEE Transactions on Intelligent Transportation Systems, 2019, 20(3): 1126-1136. DOI: https://doi.org/10.1109/TITS.2018.2847291

[4]SELMI Z, HALIMA M B, PAL U, et al. DELP-DAR system for license plate detection and recognition. Pattern Recognition Letters, 2020, 129: 213-223. DOI: https://doi.org/10.1016/j.patrec.2019.11.007

[5]MINH H T, MAI L, MINH T V. Performance evaluation of deep learning models on embedded platform for edge AI-based real-time applications//8th NAFOSTED Conference on Information and Computer Science. Hanoi, Vietnam: IEEE, 2021: 350-355.

[6]BUI T Q V, NGUYEN V T, KIM S H. Real-time object detection for autonomous driving using deep learning on edge devices. Sensors, 2021, 21(7): 2520.

[7]NAGEL M, FOURNARAKIS M, AMJAD R A, et al. A white paper on neural network quantization [Z/OL]. arXiv:2106.08295, 2021. https://arxiv.org/abs/2106.08295.

[8]NVIDIA Corporation. NVIDIA TensorRT Developer Guide. Santa Clara, CA, USA: NVIDIA Corporation, 2023.

[9]REDMON J, DIVVALA S, GIRSHICK R, et al. You only look once: Unified, real-time object detection//IEEE Conference on Computer Vision and Pattern Recognition. Las Vegas, NV, USA: IEEE, 2016: 779-788. DOI: https://doi.org/10.1109/CVPR.2016.91

[10]REDMON J, FARHADI A. YOLO9000: Better, faster, stronger//IEEE Conference on Computer Vision and Pattern Recognition. Honolulu, HI, USA: IEEE, 2017: 7263-7271. DOI: https://doi.org/10.1109/CVPR.2017.690

[11]XIAO B, GUO J, HE Z. Real-time object detection algorithm of autonomous vehicles based on improved YOLOv5s. Scientific Programming, 2021, 2021: 1-9. DOI: https://doi.org/10.1109/CVCI54083.2021.9661149

[12]JOCHER G, CHAURASIA A, STOKEN A, et al. ultralytics/yolov5: v7.0—YOLOv5 SOTA realtime instance segmentation [Z/OL]. Zenodo, 2022. https://doi.org/10.5281/zenodo.7347926.

[13]LI H, SHEN C. Reading car license plates using deep convolutional neural networks and LSTMs [Z/OL]. arXiv:1601.05610, 2016. https://arxiv.org/abs/1601.05610.

[14]ZHERZDEV S, GRUZDEV A. LPRNet: License plate recognition via deep neural networks [Z/OL]. arXiv:1806.10447, 2018. https://arxiv.org/abs/1806.10447.

[15]XU Z, YANG W, MENG A, et al. Towards end-to-end license plate detection and recognition: A large dataset and baseline//European Conference on Computer Vision Workshops. Munich, Germany: Springer, 2018: 261-277. DOI: https://doi.org/10.1007/978-3-030-01261-8_16

[16]KAMILARIS A, BRINK C V D, KARATSIOLIS S. Training deep learning models via synthetic data: Application in unmanned aerial vehicles//IEEE International Conference on Big Data. Los Angeles, CA, USA: IEEE, 2019: 6089-6091. DOI: https://doi.org/10.1007/978-3-030-29930-9_8

[17]GHOLAMI A, KIM S, DONG Z, et al. A survey of quantization methods for efficient neural network inference [Z/OL]. arXiv:2103.13630, 2021. https://arxiv.org/abs/2103.13630.

[18]LIANG T, GLOSSNER J, WANG L, et al. Pruning and quantization for deep neural network acceleration: A survey. Neurocomputing, 2021, 461: 370-403. DOI: https://doi.org/10.1016/j.neucom.2021.07.045

[19]ZHOU Y, YANG K. Exploring TensorRT to improve real-time inference for deep learning//IEEE International Conference on Artificial Intelligence and Computer Applications. Dalian, China: IEEE, 2022: 201-206.

[20]AGUILAR A H, BONILLA-ROBLES J C, ZAVALA-DÍAZ J C, et al. Real-time video image processing through GPUs and CUDA and its future implementation in real problems in a smart city//IEEE International Conference on Engineering Veracruz. Boca del Río, Mexico: IEEE, 2019: 1-6.

[21]GUO H, TIAN B, YANG Z, et al. DeepStream: Bandwidth efficient multi-camera video streaming for deep learning analytics//IEEE International Conference on Multimedia and Expo Workshops. Brisbane, Australia: IEEE, 2023: 1-6.

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已出版

2026-07-20

##submission.dataAvailability##

The data that support the findings of this study are available from the corresponding author upon reasonable request.