License Plate Detection Using Neural Networks

Authors:
Luis Carrera;Marco Mora;José Gonzalez;Francisco Aravena
Affiliations:
Les Fous du Pixel Image Processing Research Group Department of Computer Science, Catholic University of Maule, Talca, Chile;Les Fous du Pixel Image Processing Research Group Department of Computer Science, Catholic University of Maule, Talca, Chile;TUTELKAN, Talca, Chile;TUTELKAN, Talca, Chile
Venue:
IWANN '09 Proceedings of the 10th International Work-Conference on Artificial Neural Networks: Part II: Distributed Computing, Artificial Intelligence, Bioinformatics, Soft Computing, and Ambient Assisted Living
Year:
2009

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Abstract

This work presents a new method for license plate detection using neural networks in gray scale images. The method proposes a multiple classification strategy based on a Multilayer Perceptron. It consists of many classifications of one image using several shifted window grids. If a pixel belongs or not to the licence plate is determined by the most frequent answer given by the different classifications. The result becomes more precise by means of morphological operations and heuristic rules related to shape and size of the license plate zone. The whole method detects the license plates precisely with a low error rate under non-controlled environments.