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Vehicle License Plate Recognition System using DCT and LVQ
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Soowhan Han (Dept. of Multimedia Engineering, College of Engineering, Dongeui University)
Vol. 8, No. 1, Page: 15 ~ 25
Abstract
This paper proposes a vehicle license plate recognition system, which has relatively a simple structure and is highly tolerant of noise, by using the DCT(Discrete Cosine Transform) coefficients extracted from the character region of a license plate and the LVQ(Learning Vector Quantization) neural network. The image of a license plate is taken from a captured vehicle image based on RGB color information, and the character region is derived by the histogram of the license plate and the relative position of individual characters in the plate. The feature vector obtained by the DCT of extracted character region is utilized as an input to the LVQ neural classifier fur the recognition process. In the experiment, 109 vehicle images captured under various types of circumstances were tested with the proposed method, and the relatively high extraction rate of license plates and recognition rate were achieved.
Show/Hide Detailed Information in Korean
DCT와 LVQ를 이용한 차량번호판 인식 시스템
한수환 (동의대학교 공과대학 멀티미디어공학과)
Abstract
본 논문에서는 차량 번호판에서 추출된 문자영역의 DCT(Digital Cosine Transform) 계수와 LVQ(Learning Vector quantization) 신경회로망을 이용하여 상대적으로 간결한 구조로 잡음의 영향을 적게 받는 차량 번호판 인식 시스템을 제안하였다. 입력된 차량영상의 RGB칼라정보를 이용하여 번호판 영역을 추출하고 추출된 번호판의 히스토그램과 문자의 상대적 위치정보를 병합하여 문자영역을 추출하였다. 이렇게 추출된 문자영역의 명암도 영상에 DCT를 적용하여 얻은 특징 벡터를 LVQ신경회로망의 입력으로 사용하여 인식 과정을 수행한다. 본 논문의 실험과정에서는 다양한 환경에서 촬영된 109대의 자가용 차량영상에 대하여 제안된 시스템을 실험하였으며 상대적으로 높은 번호판 영역 추출율과 인식률을 보였다.
Cite this article
JIIS Style
Han, S., , "Vehicle License Plate Recognition System using DCT and LVQ", Journal of Intelligence and Information Systems, Vol. 8, No. 1 (2002), 15~25.

IEEE Style
Soowhan Han, "Vehicle License Plate Recognition System using DCT and LVQ", Journal of Intelligence and Information Systems, vol. 8, no. 1, pp. 15~25, 2002.

ACM Style
Han, S.,, 2002. Vehicle License Plate Recognition System using DCT and LVQ. Journal of Intelligence and Information Systems. 8, 1, 15--25.
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@article{Han:JIIS:2002:125,
author = {Han, Soowhan},
title = {Vehicle License Plate Recognition System using DCT and LVQ},
journal = {Journal of Intelligence and Information Systems},
issue_date = {June 2002},
volume = {8},
number = {1},
month = Jun,
year = {2002},
issn = {2288-4866},
pages = {15--25},
url = {},
doi = {},
publisher = {Korea Intelligent Information System Society},
address = {Seoul, Republic of Korea},
}
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%1 125
%A Soowhan Han
%T Vehicle License Plate Recognition System using DCT and LVQ
%J Journal of Intelligence and Information Systems
%@ 2288-4866
%V 8
%N 1
%P 15-25
%D 2002
%R
%I Korea Intelligent Information System Society