License Vehicle Plates Localization Using Maximum Correlation

  • Regis C. P. Marques
  • Fátima N. S. Medeiros
  • Jilseph Lopes Silva
  • Cassius M. Laprano
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3138)

Abstract

In this paper we propose an automatic method to locate Brazilian license plates in digital images acquired from a real monitoring traffic system. The approach is based on the correlation between lines of the preprocessed image and a square wave form that resembles lines in the region of the pattern plate. The maximum correlation points out the horizontal and vertical crossing axes over the plate. Prior to locating plates, the post processing Min/Max scheme is applied to the binary images in order to diffuse segmentation remnant noise.

Keywords

Binary Image Character Recognition Maximum Correlation License Plate Gray Level Image 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    Comelli, P., Ferragina, P., Stabile, M.N., Stabile, F.: Optical Recognition of Motor Vehicle License Plates. IEEE Transactions on Vehicular Technology 44(4), 790–799 (1995)CrossRefGoogle Scholar
  2. 2.
    Naito, T., Tsukada, T., Yamada, K., Kozuka, K., Yamamoto, S.: Robust License-Plate Recognition Method for Passing Vehicles Under Outside Environment. IEEE Transactions on Vehicular Technology 49(6), 2309–2319 (2000)CrossRefGoogle Scholar
  3. 3.
    Malladi, R., Sethian, J.A.: Image Procesing: Flows under Min/Max Curvature and Mean Curvature. Graphical Models and Image Processing 59(2), 127–141 (1996)CrossRefMathSciNetGoogle Scholar
  4. 4.
    Sethian, J.A.: Level Set Methods and Fast Marching Methods: Evolving Interfaces in Computational Geometry-Fluid Mechanics. In: Computer Vision, and Materials Science, 2nd edn., Cambridge University Press, New York (1996)Google Scholar
  5. 5.
    Pratt, W.K.: Digital Image Processing, 2nd edn. John Wiley & Sons, New York (1991)MATHGoogle Scholar
  6. 6.
    Vázquez, M., Nakano, M., Pérez-Meana, H.: Automatic System for Localization and Recognition of Vehicle Plate Numbers. Journal of Applied Research and Technology 1(1), 63–77 (2003)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Regis C. P. Marques
    • 1
  • Fátima N. S. Medeiros
    • 1
  • Jilseph Lopes Silva
    • 1
  • Cassius M. Laprano
    • 1
  1. 1.UFC- DETIFortalezaBrazil

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