CCTV CCTV System and Method for improving Recognition of Car Number by Using dynamic Thresholds

CCTV CCTV System and Method for improving Recognition of Car Number by Using dynamic Thresholds

Disclosed are a CCTV system and a vehicle number recognition method thereof. According to the present invention, the CCTV system can recognize a vehicle number by binarizing a brightness value of pixels belonging to a vehicle number area of a vehicle image to extract the number belonging to the fore...

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Hauptverfasser: KIM KYUNG LOK, LEE BUB KI
Format: Patent
Sprache:eng ; kor
Schlagworte:
CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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LEE BUB KI
description Disclosed are a CCTV system and a vehicle number recognition method thereof. According to the present invention, the CCTV system can recognize a vehicle number by binarizing a brightness value of pixels belonging to a vehicle number area of a vehicle image to extract the number belonging to the foreground from the background. At this time, a threshold value which is a reference of a vehicle number binarization is based on a brightness value distribution chart of the pixels obtained by dividing each row of the pixels, so as to minimize the influence of a shade, even if a vehicle license plate is shaded, and to increase a recognition rate of the vehicle number. CCTV 시스템 및 그 차량번호 인식방법이 개시된다. 본 발명에 따른 CCTV 시스템은 차량 이미지의 차량번호 영역에 속하는 픽셀의 밝기 값을 이진화함으로써 배경으로부터 전경에 속하는 번호를 추출하는 방식으로 차량 번호를 인식할 수 있다. 이때, 차량 번호 이진화의 기준이 되는 문턱값을 픽셀 행별로 구한 픽셀의 밝기값 분포도를 기준으로 하기 때문에 차량번호판에 음영이 생기더라도 음영에 의한 영향을 최소화할 수 있으며, 그만큼 차량번호 인식율을 높인다.
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subjects CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
title CCTV CCTV System and Method for improving Recognition of Car Number by Using dynamic Thresholds
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