License plate localization based on edge detection and morphology

Abstract

This paper presents a new method based on edge detection and morphology for the license plate localization, in this method ,first pre-processing of license plate image, then using Sobel operator for edge detection, and then using mathematical morphology processing image, then according to the priori knowledge and license plate aspect ratio to get the exact location of the license plate, and finally use horizontal projection and vertical projection to accurate positioning of the license plate. Simulation results show that the algorithm speed, high accuracy, to achieve the desired effect. © 2011 Springer-Verlag.