A License Plate Detection Algorithm Using Edge Features

  • Mostafa Ayoubi Mobarhan
  • Asadollah Shahbahrami
  • Saman Parva
  • Mina Naghash Asadi
  • Atefeh Ahmadnya Khajekini
Part of the Advances in Intelligent and Soft Computing book series (AINSC, volume 166)


License Plate Detection (LPD) is a main step in an intelligent traffic management system. Based on many techniques have been proposed to extract license plate of different vehicles in different condition. Finding a technique that provides a good accuracy with a good time response time is difficult. In this paper, we propose a technique for LPD. The proposed technique uses the edge features to find the rows position of the license plate. In order to find the column positions, we find the small blue color part at the left of the license plates in the determined rows position. Our experimental results for different image database show that an accuracy of 96.6 percent can be achieved.


License Plate Detection Edge Detection 


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  1. 1.
    Ozbay, S., Ercelebi, E.: Automatic Vehicle Identification by Plate Recognition. In: World Academy of Science Engineering and Technology, pp. 222–225 (2005)Google Scholar
  2. 2.
    Wu, M.K., Wei, J.S., Shih, H.C.: License Plate Detection Based on 2-Level 2D Haar Wavelet Transform and Edge Density Verification. In: IEEE Int. Symposium on Industrial Electronics, pp. 1699–1704 (2009)Google Scholar
  3. 3.
    Nguyen, C., Ardabilian, M., Chen, L.: Unifying Approach for Fast License Plate Localization and Super-Resolution. In: Int. Conf. on Pattern Recognition, pp. 376–379 (2010)Google Scholar
  4. 4.
    Akoum, A., Daya, B., Chauvet, P.: Two Neural Networks for License Number Plates Recognition. Journal of Theoretical and Applied Information Technology, 25–32 (2005)Google Scholar
  5. 5.
    Irecki, D., Bailey, D.G.: Vehicle Registration Plate Localization and Recognition. In: Proc. of the Electronics New Zealand Conf. ENZCon’OI, New Plymouth, New Zealand, pp. 236–247 (2001)Google Scholar
  6. 6.
    Deb, K., Chae, H., Jo, K.: Vehicle License Plate Detection Method Based on Sliding Concentric Windows and Histogram. Journal of Computers 4(8), 771–777 (2009)CrossRefGoogle Scholar
  7. 7.
    Chang, S., Chen, L., Chung, Y., Chen, S.: Automatic License Plate Recognition. In: IEEE Int. Conf. Intelligent Transportation Systems, pp. 236–249. IEEE Computer Society Press (2004)Google Scholar
  8. 8.
    Shi, X., Zhao, W., Shen, Y.: Automatic License Plate Recognition System Based on Color Image Processing. In: Gervasi, O., Gavrilova, M.L., Kumar, V., Laganá, A., Lee, H.P., Mun, Y., Taniar, D., Tan, C.J.K. (eds.) ICCSA 2005, Part IV. LNCS, vol. 3483, pp. 1159–1168. Springer, Heidelberg (2005)CrossRefGoogle Scholar
  9. 9.
    Cano, J., Perez-cortes, J.C.: Vehicle License Plate Segmentation in Natural Images. In: Perales, F.J., Campilho, A.C., Pérez, N., Sanfeliu, A. (eds.) IbPRIA 2003. LNCS, vol. 2652, pp. 142–149. Springer, Heidelberg (2003)CrossRefGoogle Scholar
  10. 10.
    Yanamura, Y., Goto, M., Nishiyama, D., Soga, M., Nakatani, H., Saji, H.: Extraction and Tracking of The License Plate Using Hough Transform and Voted Block Matching. In: IEEE Intelligent Vehicles Symposium, pp. 243–246 (2003)Google Scholar
  11. 11.
    Kang, D.: Dynamic Programming Based Method for Extraction of License Plate Numbers of Speeding Vehicles on The Highway. Journal of Automotive Technology 10(2), 205–210 (2009)CrossRefGoogle Scholar
  12. 12.
    Tahir, A., Habib, H.A., Khan, M.F.: License Plate Recognition Algorithm for Pakistani License Plates. Canadian Journal on Image Processing and Computer Vision 1(2), 16–21 (2010)Google Scholar
  13. 13.
    Zamani, A., Movahedi, M.: Car Plate Identification Using Morphology and Constant Moments Transform. In: Conf. Ferdowsi University, Mashhad, Iran (2007)Google Scholar
  14. 14.
    Kasaei, H., Kasaei, M., Kasaei, A.: New Morphology-Based Method for Robust Iranian Car Plate Detection and Recognition. Journal of Computer Theory and Engineering 2(2), 264–268 (2010)CrossRefGoogle Scholar
  15. 15.
    Abolghasemi, M., Ahmadifard, A.: A Car Plate Identification System Base on LFT Transform. In: Conf. Ferdowsi University, Mashhad, Iran (2007)Google Scholar
  16. 16.
    Kamat, V., Ganesan, S.: An Efficient Implementation of the Hough Transform for Detecting Vehicle License Plates Using DSP’s. In: IEEE Real-Time Technology and Application Symposium, RTAS, pp. 58–72 (1995)Google Scholar
  17. 17.
    Kang, J., Kang, M., Park, C., Kim, J., Choi, Y.: Implementation of Embedded System for Vehicle Tracking and License Plates Recognition Using Spatial Relative Distance. In: 26th Int. Conf. on Information Technology Interfaces, pp. 167–172 (2004)Google Scholar
  18. 18.
    Bellas, N., Chai, S.M., Dwyer, M., Linzmeier, D.: FPGA Implementation of A License Plate Recognition Soc Using Automatically Generated Streaming Accelerators. In: 20th Int. Parallel and Distributed Processing Symposium, IPDPS, pp. 8–19 (2006)Google Scholar
  19. 19.
    Park, E.A.: OCR in A Hierarchical Feature Space. IEEE Transactions on Pattern Analysis and Machine Intelligence, 400–407 (2000)Google Scholar
  20. 20.
    Bailey, D.G., Irecki, D., Lim, B.K., Yang, L.: Test Bed for Number Plate Recognition Applications. In: Proc. of the First IEEE International Workshop on Electronic Design, Test and Applications, DELTA 2002, pp. 501–503 (2002)Google Scholar
  21. 21.
    Chen, Z., Wang, G., Liu, J., Liu, C.: Automatic License Plate Location and Recognition Based on Feature Salience. Int. Journal of Computational Cognition 5(2), 1–9 (2007)Google Scholar
  22. 22.
    Mahini, H., Kasaei, S., Dorri, F.: An Efficient Features-Based License Plate Localization Method. In: Proc. of IEEE Int. Conf on Pattern Recognition, ICPR, pp. 841–844 (2006)Google Scholar
  23. 23.
    Zheng, D., Zhao, Y., Wang, J.: An Efficient Method of License Plate Location. Pattern Recognition Letters, 2431–2438 (2005)Google Scholar
  24. 24.
    Pan, X., Ye, X., Zhang, S.: A Hybrid Method for Robust Car Plate Character Recognition. Engineering Applications of Artificial Intelligence, 963–972 (2005)Google Scholar
  25. 25.
    Parasuraman, K., Kumar, P.: An Efficient Method for Indian Vehicle License Plate Extraction and Character Segmentation. In: IEEE Int. Conf. on Machine Vision and Humanmachine Interface, pp. 447–452 (2010)Google Scholar
  26. 26.
    Duan, J., Qiu, G.: Novel Histogram Processing for Color Image Enhancement. In: IEEE Int. Conf. Image Graph, pp. 55–58 (2004)Google Scholar
  27. 27.
    Abolghasemi, V., Ahmadyfard, A.: A Fast Algorithm for License Plate Detection. In: Conf. on Advances in Visual Information Systems, pp. 468–477 (2007)Google Scholar
  28. 28.
    Abolghasemi, V., Ahmadyfard, A.: An Edge-based Color-aided Method for License Plate Detection. Image and Vision Computing, 1134–1142 (2009)Google Scholar
  29. 29.
    Kolour, H.S., Shahbahrami, A.: An Evaluation of License Plate Recognition Algorithms. International Journal of Digital Information and Wireless Communications (IJDIWC), 247–253 (2011)Google Scholar

Copyright information

© Springer-Verlag GmbH Berlin Heidelberg 2012

Authors and Affiliations

  • Mostafa Ayoubi Mobarhan
    • 1
  • Asadollah Shahbahrami
    • 1
  • Saman Parva
    • 1
  • Mina Naghash Asadi
    • 1
  • Atefeh Ahmadnya Khajekini
    • 1
  1. 1.Computer Engineering Department, Faculty of EngineeringUniversity of GuilanRashtIran

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