KR960042444A

KR960042444A - Recognition Processing Device for Automobile License Plate Using Multi-Mask Technique and Its Method

Info

Publication number: KR960042444A
Application number: KR1019960044991A
Authority: KR
Inventors: 송광원; 엄성용; 김광섭; 홍정철
Original assignee: 송병남; 기아정보시스템 주식회사
Priority date: 1996-10-10
Filing date: 1996-10-10
Publication date: 1996-12-21

Abstract

차량의 존재여부를 감지한 뒤에 이를 전기적인 신호로 변환하여 출력하는 차량 감지부와, 차량이 감지되는 경우에 차량을 촬영함으로써 차량에 대한 영상 데이터를 생성하여 출력하는 카메라부와, 상기한 차량 감지부에 의해서 차량이 감지되는 경우에 상기한 카메라부로부터 입력되는 영상 데이터를 읽어들여서, 영상 데이터 중에서 확률이 가장 높은 라인부터 검색을 시작하여 미분처리 및 필터링을 하여 에지를 추출하고, 상기한 에지를 이용하여 숫자영역을 검색한 뒤에, 영역별로 적응형이진화 및 라벨링을 통하여 문자 및 숫자의 영역을 추출하고, 다중 마스크를 이용하여 숫자 및 문자의 특징을 추출하여 신경 회로망에 입력시킴으로써 문자 및 숫자를 인식하는 제어부와, 프로그램 및 데이터가 저장되어 있는 메모리로 이루어지며, 신경 회로망을 이용하여 문자 인식을 하면서, 다중 마스크를 이용하여 오인식유발이 의심스러운 영역에 가중치를 더해줌으로써 인식률을 향상시킨 다중마스크기법을 이용한 자동차 번호판의 인식 처리장치 및 그 방법을 제공한다.A vehicle detection unit which detects the presence of a vehicle and converts it into an electrical signal and outputs the electric signal; a camera unit which generates and outputs image data of the vehicle by photographing the vehicle when the vehicle is detected; and detecting the vehicle. When the vehicle is detected by the unit, the image data input from the camera unit is read, the search is started from the line with the highest probability among the image data, differential processing and filtering are performed, and the edge is extracted. After retrieving the numerical domain by using the adaptive binarization and labeling for each domain, the character and the numerical domain are extracted, and the character and the character are extracted using multiple masks and input into the neural network to recognize the characters and numbers. A control unit and a memory in which programs and data are stored, and a neural network As used in the character recognition, using a multi-mask provides misrecognized causing the suspicious region by giving a weight added by the multi-mask techniques that improve the recognition rate of the license plate recognition processing apparatus for and method.

Description

Recognition Processing Device for Automobile License Plate Using Multi-Mask Technique and Its Method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 이 발명의 실시예에 따른 다중마스크 기법을 이용한 자동차 번호판의 인식처리장치의 블럭 구성도이다. 제2도의 (A)∼(E)는 이 발명의 실시예에 따른 다중마스크 기법을 이용한 자동차 번호판의 인식 처리장치의 숫자영역 검색과정을 설명하기 위한 도면이다. 제3도는 이 발명의 실시예에 따른 다중마스크 기법을 이용한 자동차 번호판의 인식처리장치의 숫자후보 검색과정을 설명하기 위한 블럭 구성도이다. 제4도는 이 발명의 실시예에 따른 다중마스크 기법을 이용한 자동차 번호판의 인식처리장치의 문자 및 숫자 영역추출 과정을 설명하기 위한 도면이다.1 is a block diagram of an apparatus for recognizing a license plate of a vehicle using a multiple mask technique according to an exemplary embodiment of the present invention. 2 (A) to (E) are diagrams for explaining a numerical area search process of a recognition plate recognition apparatus of a license plate using a multiple mask technique according to an embodiment of the present invention. 3 is a block diagram illustrating a number candidate search process of a recognition plate processing apparatus for a license plate using a multi-mask technique according to an embodiment of the present invention. 4 is a view for explaining a process of extracting letters and numbers from a license plate recognition processing apparatus using a multi-mask technique according to an embodiment of the present invention.

Claims

A vehicle detection unit which detects the presence of a vehicle and converts it into an electrical signal and outputs the electric signal; a camera unit which generates and outputs image data of the vehicle by photographing the vehicle when the vehicle is detected; and detecting the vehicle. When the vehicle is detected by the unit, the image data input from the camera unit is read, the search is started from the line with the highest probability among the image data, differential processing and filtering are performed, and the edge is extracted. After retrieving the numerical domain by using the adaptive binarization and labeling for each domain, the character and the numerical domain are extracted, and the character and the character are extracted using multiple masks and input into the neural network to recognize the characters and numbers. And a memory in which a program and data are stored. Recognition processing device of a license plate with a multiple mask method according to claim.

The apparatus of claim 1, further comprising a display unit for displaying a recognition result on a screen.

Detecting the presence of a vehicle and taking a picture of the vehicle when the vehicle is detected, inputting image data of the vehicle, and reading the image data to start searching from the line with the highest probability among the image data to perform differential processing and filtering. Extracting edges, searching for numeric regions using the edges, and extracting regions of letters and numbers through adaptive binarization and labeling for each region; and numbers and characters using multiple masks. And extracting a feature of the character, and recognizing the character and the number by inputting the characteristic of the number and the character into the neural network.

※ Note: The disclosure is based on the initial application.