Automatic license-plate recognition

Introduction. The problem of automatic license plate recognition is considered. Its solution has many potential applications from safety to traffic control. The work objective was to develop an intelligent recognition system based on the application of deep learning algorithms, such as convolution n...

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Main Authors: A. V. Poltavskii, T. G. Yurushkina, M. V. Yurushkin
Format: Article
Language:Russian
Published: Don State Technical University 2020-03-01
Series:Advanced Engineering Research
Subjects:
Online Access:https://www.vestnik-donstu.ru/jour/article/view/1640
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author A. V. Poltavskii
T. G. Yurushkina
M. V. Yurushkin
author_facet A. V. Poltavskii
T. G. Yurushkina
M. V. Yurushkin
author_sort A. V. Poltavskii
collection DOAJ
description Introduction. The problem of automatic license plate recognition is considered. Its solution has many potential applications from safety to traffic control. The work objective was to develop an intelligent recognition system based on the application of deep learning algorithms, such as convolution neural networks that consider automotive standards for license plates in various countries and continents, and are tolerant to camera locations and quality of input images, as well as to changing lighting, weather conditions, and license plate deformations.Materials and Methods. An integrated approach for the problem solution based on the application of convolution neural network composition is proposed. An experimental analysis of neural network models trained to meet the requirements of the universal license plate recognition task was conducted. Based on it, models that showed the best ratio of quality and speed were selected. Quality of the system is provided through the optimization of various models with different modifications. In particular, convolution neural networks were trained using images from several datasets. In addition, to obtain the best results, the models used were pre-trained on a specially generated synthetic dataset.Results. The paper presents numerical experiments, the results of which imply the superiority of the developed algorithm over the commercial OpenALPR package on public datasets. In particular, on the 2017-IWT4S-HDR_LP-dataset, license plate recognition accuracy was 94 percent, and on the Application-Oriented License Plate dataset, 86 percent.Discussion and Conclusions. The resulting algorithm can be used to automatically detect and recognize license plates. The experiments show that the algorithm quality meets or exceeds quality of the commercial OpenALPR package. The developed algorithm quality can be improved through increasing the training dataset, which does not require the participation of the developer.
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spelling doaj-art-31e447888b784aaba5f48fd31f53773d2025-08-20T03:57:12ZrusDon State Technical UniversityAdvanced Engineering Research2687-16532020-03-01201939910.23947/1992-5980-2020-20-1-93-991457Automatic license-plate recognitionA. V. Poltavskii0T. G. Yurushkina1M. V. Yurushkin2Southern Federal UniversityDon State Technical UniversitySouthern Federal UniversityIntroduction. The problem of automatic license plate recognition is considered. Its solution has many potential applications from safety to traffic control. The work objective was to develop an intelligent recognition system based on the application of deep learning algorithms, such as convolution neural networks that consider automotive standards for license plates in various countries and continents, and are tolerant to camera locations and quality of input images, as well as to changing lighting, weather conditions, and license plate deformations.Materials and Methods. An integrated approach for the problem solution based on the application of convolution neural network composition is proposed. An experimental analysis of neural network models trained to meet the requirements of the universal license plate recognition task was conducted. Based on it, models that showed the best ratio of quality and speed were selected. Quality of the system is provided through the optimization of various models with different modifications. In particular, convolution neural networks were trained using images from several datasets. In addition, to obtain the best results, the models used were pre-trained on a specially generated synthetic dataset.Results. The paper presents numerical experiments, the results of which imply the superiority of the developed algorithm over the commercial OpenALPR package on public datasets. In particular, on the 2017-IWT4S-HDR_LP-dataset, license plate recognition accuracy was 94 percent, and on the Application-Oriented License Plate dataset, 86 percent.Discussion and Conclusions. The resulting algorithm can be used to automatically detect and recognize license plates. The experiments show that the algorithm quality meets or exceeds quality of the commercial OpenALPR package. The developed algorithm quality can be improved through increasing the training dataset, which does not require the participation of the developer.https://www.vestnik-donstu.ru/jour/article/view/1640object detection and recognitionconvolution neural networksdata generation and augmentationlicense plate recognition
spellingShingle A. V. Poltavskii
T. G. Yurushkina
M. V. Yurushkin
Automatic license-plate recognition
Advanced Engineering Research
object detection and recognition
convolution neural networks
data generation and augmentation
license plate recognition
title Automatic license-plate recognition
title_full Automatic license-plate recognition
title_fullStr Automatic license-plate recognition
title_full_unstemmed Automatic license-plate recognition
title_short Automatic license-plate recognition
title_sort automatic license plate recognition
topic object detection and recognition
convolution neural networks
data generation and augmentation
license plate recognition
url https://www.vestnik-donstu.ru/jour/article/view/1640
work_keys_str_mv AT avpoltavskii automaticlicenseplaterecognition
AT tgyurushkina automaticlicenseplaterecognition
AT mvyurushkin automaticlicenseplaterecognition