COMPARISON OF METHODS FOR AUTOMATIC LICENSE NUMBER RECOGNITION

Authors

  • V. Shevchenko O.M. Beketov National University of Urban Economy in Kharkiv
  • V. Bredikhin O.M. Beketov National University of Urban Economy in Kharkiv
  • Т. Senchuk O.M. Beketov National University of Urban Economy in Kharkiv
  • V. Verbytska Kharkiv National Automobile and Highway University

DOI:

https://doi.org/10.33042/2522-1809-2022-4-171-7-11

Keywords:

automatic recognition, license plates, localization, normalization, segmentation, character recognition

Abstract

The paper is devoted to the problem of automatic detection and recognition of license plates, the solution of which has many potential applications, from security to traffic management. The purpose of this work was to compare the methods of finding and recognizing car number plates, based on the application of deep learning algorithms, which takes into account different regional standards of car number plates, video quality, different speeds of vehicles, the location of the camera in relation to the vehicle license plate, defects of the car number plate (pollution , deformation), as well as changes in external lighting conditions. The advantages and disadvantages of localization and segmentation of car number plates on cars using image binarization, Viola–Jones and Harr methods are given. It was determined that adaptive approaches are better due to the possibility of compensating the impact of obstacles on different areas of the image, for example, the distribution of shadows due to the heterogeneity of illumination. It was determined that many methods in real algorithms rely directly or indirectly on the presence of number limits. Even if the limits are not used when the number is determined, they have the possibility to be used for further analysis. The methods of templates, image histograms, and contour analysis were compared to identify familiar features in the image (segmentation). It is shown that an effective approach for recognition of car license plates can be based on the application of the methods of Viola-Jones, Harr, the analysis of brightness histograms and the SVM method. Formulated conclusions on the effectiveness of the implementation of each of the procedures were confirmed as a result of conducting experiments with the developed software in the python 3 language using the cv2 computer vision library. The described approach makes it possible to obtain a fairly high recognition accuracy at different angles of rotation of the license plate relative to the camera.

Author Biographies

V. Shevchenko, O.M. Beketov National University of Urban Economy in Kharkiv

master of the 2nd year of the educational and scientific institute of energy, information and transport infrastructure

V. Bredikhin, O.M. Beketov National University of Urban Economy in Kharkiv

p.h.d., Department of Computer Science and Information Technology

Т. Senchuk, O.M. Beketov National University of Urban Economy in Kharkiv

Senior Lecturer, Department of Computer Science and Information Technology

V. Verbytska, Kharkiv National Automobile and Highway University

PhD, Department of Accounting and Taxation

References

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Обкладинка том 4 № 171 (2022)

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Published

2022-10-17

How to Cite

Shevchenko, V., Bredikhin, V., Senchuk Т., & Verbytska, V. (2022). COMPARISON OF METHODS FOR AUTOMATIC LICENSE NUMBER RECOGNITION. Municipal Economy of Cities, 4(171), 7–11. https://doi.org/10.33042/2522-1809-2022-4-171-7-11

Issue

Vol. 4 No. 171 (2022): Series: Engineering science and architecture

Section

статьи

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