An Edge-Based Macao License Plate Recognition System

DOI

10.2991/ijcis.2011.4.2.12How to use a DOI?

Keywords

License plate recognition, edge detection, projection, morphology, template matching.

Abstract

This paper presents a system to recognize Macao license plates. Sobel edge detector is employed to extract the vertical edges, and an edge composition algorithm is proposed to combine the edges into candidate plate regions. They are further examined on the existence of the character "M" by a verification algorithm. A row separation algorithm is also proposed to cater both one-row and two-row types of plates. Projection analysis and template matching methods are exploited to segment and recognize the characters. Various pre and post processing steps are proposed other than traditional implementation so as to improve the recognition accuracy. This work achieves a high recognition rate of 95%.

Copyright

© 2011, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - JOUR
AU  - Chi-Man Pun
AU  - Wai-Yiu Ho
PY  - 2011
DA  - 2011/04/01
TI  - An Edge-Based Macao License Plate Recognition System
JO  - International Journal of Computational Intelligence Systems
SP  - 244
EP  - 254
VL  - 4
IS  - 2
SN  - 1875-6883
UR  - https://doi.org/10.2991/ijcis.2011.4.2.12
DO  - 10.2991/ijcis.2011.4.2.12
ID  - Pun2011
ER  -