Abstract
Most of the existing license plate localization algorithms have a parameter that is related to the size of the license plate. There is no parameter that is suitable for all the cases. In this paper, an algorithm is proposed to automatically compute the size-related parameter. Then a hierarchical system based on the self-adaptive parameter is proposed to locate license plates. Both connected component based methods and vertical edge based methods are used. The parameter is first used as the local window size to suppress the shadow. Then it is used to connect the discrete vertical edges to form a license plate region. The proposed system is used to locate license plates with shadow, and experiments are taken on images with different resolutions. The total localization accuracy achieves 94.40%. It can compete with the state-of-the-art methods and need not determine the optimal parameter by trial and error.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Anagnostopoulos, C.N.E., Anagnostopoulos, I.E., Loumos, V., Kayafas, E.: A license plate-recognition algorithm for intelligent transportation system applications. IEEE Trans. Intell. Transp. Syst. 7(3), 377–392 (2006)
Bernsen, J.: Dynamic thresholding of grey-level images. In: Proceedings of Eighth International Conference on Pattern Recognition, Paris, pp. 1251–1255 (1986)
Chen, Z., Chang, F., Liu, C.: Chinese license plate recognition based on human vision attention mechanism. Int. J. Pattern Recogn. Artif. Intell. 27(08), 1350024 (2013)
Dehshibi, M.M., Allahverdi, R.: Persian vehicle license plate recognition using multiclass adaboost. Int. J. Comput. Electr. Eng. 4(3), 355–358 (2012)
Jiao, J., Ye, Q., Huang, Q.: A configurable method for multi-style license plate recognition. Pattern Recogn. 42(3), 358–369 (2009)
Khurshid, K., Faure, C.: Comparison of Niblack inspired binarization methods for ancient documents. In: Document Recognition and Retrieval XVI, DRR, Document Recognition and Retrieval Conference, pp. 1–10 (2009)
Kittler, J., Illingworth, J.: Minimum error thresholding. Pattern Recogn. 19(1), 41–47 (1986)
Lalimi, M.A., Ghofrani, S., Mclernon, D.: A vehicle license plate detection method using region and edge based methods. Comput. Electr. Eng. 39(3), 834–845 (2013)
Li, B., Tian, B., Li, Y., Wen, D.: Component-based license plate detection using conditional random field model. IEEE Trans. Intell. Transp. Syst. 14(4), 1690–1699 (2013)
Niblack, W.: An introduction to digital image processing. Master’s thesis, Strandberg Publishing Company (1985)
Nistér, D., Stewénius, H.: Linear time maximally stable extremal regions. In: Forsyth, D., Torr, P., Zisserman, A. (eds.) ECCV 2008. LNCS, vol. 5303, pp. 183–196. Springer, Heidelberg (2008). doi:10.1007/978-3-540-88688-4_14
Otsu, N.: A threshold selection method from gray-level histograms. IEEE Trans. Syst. Man Cybern. 9(1), 62–66 (1979)
Peng, Y., Xu, M., Jin, J.S., Luo, S., Zhao, G.: Cascade-based license plate localization with line segment features and haar-like features. In: 2011 Sixth International Conference on Image and Graphics (ICIG), pp. 1023–1028 (2011)
Rasooli, M., Ghofrani, S., Fatemizadeh, E.: Farsi license plate detection based on element analysis and characters recognition. Int. J. Sig. Process. Image Process. Pattern Recogn. 4(4), 697–700 (2011)
Sauvola, J., Pietikainen, M.: Adaptive document image binarization. Pattern Recogn. 33(2), 225–236 (2000)
Wen, Y., Lu, Y., Yan, J., Zhou, Z., Deneen, K.M., Shi, P.: An algorithm for license plate recognition applied to intelligent transportation system. IEEE Trans. Intell. Transp. Syst. 12(3), 830–845 (2011)
Zheng, L., He, X., Samali, B., Yang, L.T.: An algorithm for accuracy enhancement of license plate recognition. J. Comput. Syst. Sci. 79(2), 245–255 (2013)
Acknowledgments
This research work was supported by China Natural Science Foundation (No: 61272304) and Zhejiang Provincial Natural Science Foundation of China (No. LY15F020024).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2017 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Dun, J., Zhang, S. (2017). System Locating License Plates with Shadow Based on Self-adaptive Window Size Technique. In: Yuan, H., Geng, J., Bian, F. (eds) Geo-Spatial Knowledge and Intelligence. GRMSE 2016. Communications in Computer and Information Science, vol 699. Springer, Singapore. https://doi.org/10.1007/978-981-10-3969-0_15
Download citation
DOI: https://doi.org/10.1007/978-981-10-3969-0_15
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-10-3968-3
Online ISBN: 978-981-10-3969-0
eBook Packages: Computer ScienceComputer Science (R0)