Riesz Fractional Based Model for Enhancing License Plate Detection and Recognition

Raghunandan, K.S. and Shivakumara, Palaiahnakote and Jalab, Hamid Abdullah and Ibrahim, Rabha Waell and Kumar, Govindaraj Hemantha and Pal, Umapada and Lu, Tong (2018) Riesz Fractional Based Model for Enhancing License Plate Detection and Recognition. IEEE Transactions on Circuits and Systems for Video Technology, 28 (9). pp. 2276-2288. ISSN 1051-8215, DOI https://doi.org/10.1109/TCSVT.2017.2713806.

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Official URL: https://doi.org/10.1109/TCSVT.2017.2713806


One of the major causes of poor results in license plate recognition is low quality of images affected by multiple factors, such as severe illumination condition, complex background, different weather conditions, night light, and perspective distortions. In this paper, we propose a new mathematical model based on Riesz fractional operator for enhancing details of edge information in license plate images to improve the performances of text detection and recognition methods. The proposed model performs convolution operation of the Riesz fractional derivative over each input image by enhancing the edge strength in it. To test the performance of the proposed model, we conduct experiments on benchmark license plate image databases, namely, UCSD and ICDAR 2015-SR competition text image databases. Experimental results on enhancement show that the proposed model outperforms the existing baseline enhancement techniques in terms of quality measures. Furthermore, experimental results on text detection and recognition show that text detection and recognition rates are improved significantly after enhancement compared with before enhancement.

Item Type: Article
Funders: Natural Science Foundation of China under Grant 61672273, Grant 61272218, and Grant 61321491, Science Foundation for Distinguished Young Scholars of Jiangsu under Grant BK20160021, University of Malaya HIR under Grant UM.C/625/1/HIR/MoE/FCSIT/08 and Grant H-22001-00-B00008 from the Ministry of Education Malaysia
Uncontrolled Keywords: enhancement model; license plate recognition; license plate text detection; Low quality images; Riesz fractional order derivative
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: Faculty of Computer Science & Information Technology
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 18 Apr 2019 02:17
Last Modified: 18 Apr 2019 02:17
URI: http://eprints.um.edu.my/id/eprint/20991

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