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Robust Search-Free Car Number Plate Localization Incorporating Hierarchical Saliency

Safaei, A, Tang, HL and Sanei, S (2016) Robust Search-Free Car Number Plate Localization Incorporating Hierarchical Saliency Journal of Computer Science & Systems Biology, 9 (3). pp. 93-103.

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Abstract

There are two major shortcomings associated with presently implemented automatic license plate recognition (ALPR) systems: first, processing images with complex background is time-consuming and second, the results are not sufficiently accurate. To overcome these problems and also to achieve a robust recognition of multiple car number plates, saliency detection based on the ALPR system is used in this paper and also an improved and more effective definition of saliency is presented. In this new approach, the notion of the directionality of the edges using Gabor filtering and the detection of the patterns of numbers using L1-norm have been added to the traditional saliency detection method. The proposed algorithm was tested on 660 images; some consisting of two or more cars. A detection accuracy of 94.77% and an average execution time of 40 ms for 600 × 800 images are the marked outcomes. The proposed SB-ALPR method outperforms most of the state of the art techniques in terms of execution time and accuracy, and can be used in real-time applications. Also, unlike some recently introduced saliency-based ALPR methods, our two-stage saliency detection approach exploits smaller numbers of sample sizes to reduce the computation cost.

Item Type: Article
Subjects : Computing
Divisions : Faculty of Engineering and Physical Sciences > Computing Science
Authors :
AuthorsEmailORCID
Safaei, AUNSPECIFIEDUNSPECIFIED
Tang, HLUNSPECIFIEDUNSPECIFIED
Sanei, SUNSPECIFIEDUNSPECIFIED
Date : 5 April 2016
Identification Number : 10.4172/jcsb.1000225
Copyright Disclaimer : © 2016 Safaei A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Uncontrolled Keywords : Automatic license plate recognition, Gabor filter, L1- norm, Saliency map detection, Search-free
Depositing User : Symplectic Elements
Date Deposited : 28 Jul 2016 14:03
Last Modified : 28 Jul 2016 14:03
URI: http://epubs.surrey.ac.uk/id/eprint/811511

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