Abstract
To alleviate the problems of slow speed and weak correction ability of existing license plate correction methods under complex conditions, this paper presents a faster license plate positioning method based on the color component combination and color region fusion and develops a more accurate correction algorithm of blue license plate using probabilistic Hough transform and perspective transform. The proposed methods utilize the characteristics of white characters on the blue background of the Chinese license plate. Color component combination in HSV and RGB color spaces and image thresholding are first performed to obtain the background region of the blue license plate and its character region. Then, both regions are fused to obtain complete and accurate license plate region. And finally, edge detection, probabilistic Hough transform, and perspective transform are performed to achieve rapid license plate correction. Experimental results show that average correction time of blue license plate obtained by the proposed method is 0.023 s, and the average correction rate is 95.0%.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsReferences
Rui, T., Shen, C., Zhang, J.: A fast algorithm for license plate orientation correction. Comput. Eng. 30(13), 122–124 (2004)
Ge, H., Fang, J., Zhang, X.: Research on license plate location and tilt correction algorithm in License plate recognition system. J. Hangzhou Dianzi Univ. 27(2) (2007)
Wang, S., Yin, J., Xu, J., Li, Z., Liang, J.: A fast algorithm for license plate recognition correction. J. Chang. Univ. (Nat. Sci. Ed.) 30(04), 76–86 (2018)
Wang, N.: License plate location and slant correction algorithm. Ind. Control. Comput. 27(11), 25–26 (2014)
Ji, J., Cheng, Y., Wang, J., Luo, J., Chang, H.: Rapid correction of slant plate in license plate recognition. Technol. Econ. Guid. 26(35), 68 (2018)
Lu, H., Wen, H.: License plate positioning and license plate correction method under different degrees of inclination. Mod. Ind. Econ. Inf. 6(05), 69–71 (2016)
Stephens, R.S.: Probabilistic approach to the Hough transform. Image Vis. Comput. 9(1), 66–71 (1991)
Niu, Y.: Discussion about perspective transform. J. Comput.-Aided Des. Comput. Graph. 13(6), 549–551 (2001)
Liu, W., Anguelov, D., Erhan, D., et al.: SSD: single shot multibox detector. In: European Conference on Computer Vision, pp. 21–37. Springer, Cham (2016)
Zheng, K., Zheng, C., Guo, S., Cheng, K.: Research on fast location algorithm of license plate based on color difference. Comput. Appl. Softw. 34(05), 195–199 (2017)
Otsu, N.: A threshold selection method from gray-level histograms. IEEE Trans. Syst. Man Cybern. 9(1), 62–66 (2007)
Canny, J.: A computational approach to edge detection. In: In Readings in Computer Vision, pp. 184–203. Morgan Kaufmann (1987)
Author information
Authors and Affiliations
Corresponding authors
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Wu, J., Yu, Z., Zhang, Z., Li, Z., Liu, W., Yu, J. (2020). A Method for Precise Positioning and Rapid Correction of Blue License Plate. In: Pan, JS., Li, J., Tsai, PW., Jain, L. (eds) Advances in Intelligent Information Hiding and Multimedia Signal Processing. Smart Innovation, Systems and Technologies, vol 157. Springer, Singapore. https://doi.org/10.1007/978-981-13-9710-3_45
Download citation
DOI: https://doi.org/10.1007/978-981-13-9710-3_45
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-13-9709-7
Online ISBN: 978-981-13-9710-3
eBook Packages: Intelligent Technologies and RoboticsIntelligent Technologies and Robotics (R0)