CN1529276A

CN1529276A - Device and method for automatically identifying registration number for motor vehicle

Info

Publication number: CN1529276A
Application number: CNA2003101048527A
Authority: CN
Inventors: 董慧颖
Original assignee: Shenyang Polytechnic College
Current assignee: Shenyang Polytechnic College
Priority date: 2003-10-17
Filing date: 2003-10-17
Publication date: 2004-09-15

Abstract

The device comprises infrared sensor, A/D convertor, image collector, image convertor, computer and controlling center. The infrared sensor through A/D convertor is connected to computer. Control signal end of the computer connected to image collector controls image collection in realtime. Video images collected by image collector through image convertor are converted in a frame by a frame and a field by field to digital image transferred to computer. Working procedure is as following: (1) selecting, (2) there is a car or not, (3) collecting, (4) searching and positioning, (5) segmenting, (6) is segmented correctly, (7) normalization, (8) classifying and recognizing (9) result sent to control center. Advantages of the invention are simple structure, accurate recognition, easy of operation and low cost. The invention is suitable to automatic dynamic recognizing license plate of car, goods No. of shipping container, No. of train in realtime.

Description

Motor vehicle trade mark automatic identification equipment and recognition methods

Technical field

The present invention relates to a kind of motor vehicle trade mark recognition technology, particularly a kind of motor vehicle trade mark automatic identification equipment and recognition methods.

Background technology

At present, the automatic identification of the motor vehicle trade mark, in traffic administration, social security etc. are all paid much attention to, the particularly monitoring violating the regulations of expressway tol lcollection, vehicle supervision department, vehicle recovery, the vehicle management of senior house biotope, the identification management of station terminal container, train article No. etc. is not widely used, mostly be artificial or semi-automatic processing at present, i.e. waste of manpower, poor accuracy, efficient is low.Therefore, be sought after developing simple in structure, accuracy is high, cost is low, easy to operate, and can Real-time and Dynamic the device of automatic identification maneuver license plate number.

Summary of the invention

The objective of the invention is the problem that exists at existing motor vehicle trade mark identification, a kind of simple in structure, motor vehicle trade mark automatic identification equipment and recognition methods that accuracy is high, easy to operate are provided.

The present invention is by infrared sensor, A/D converter, image acquisition device, image converter, computing machine and control center form, infrared sensor links to each other with computing machine by A/D converter, the control signal end of computing machine links to each other with image acquisition device again, realization is to the control of image real-time acquisition, the video image that image acquisition device is gathered is sent into computing machine frame by frame or by being converted to digital picture by image converter, after machine is handled as calculated, the license plate number recognition result is given the relevant vehicle management department of control center, charge department and public security management department etc., also can show and monitor simultaneously, described image acquisition device is a video camera, and working routine of the present invention is: (1) is selected; (2) is there car not? there is car to start image acquisition device, otherwise awaits orders; (3) gather the image acquisition device images acquired; Whether (4) regional location of license plate number in image promptly searched in the search location, and judges the image background color, reverse according to the background color decision of car plate, and unification is the black matrix wrongly written or mispronounced character, if white gravoply, with black engraved characters, then counter-rotating; (5) cut apart, the single character of license plate number separately, judge cut apart complete not? recover to cut apart again otherwise proofread and correct; (6) cut apart correctly not? if then carry out normalization, otherwise cut apart again; (7) normalization is normalized to equirotal standard input character image with character picture; (8) Classification and Identification, identification letter and numeral or Chinese character; (9) result gives control center with result.

Simple in structure, accurate, the easy to operate and low cost and other advantages of identification that the present invention has is applicable to that the Real-time and Dynamic of license plate, container article No., train article No. is discerned automatically.

Description of drawings

Fig. 1 is a structured flowchart of the present invention;

Fig. 2 is a workflow diagram of the present invention;

Among the figure: 1 infrared sensor, 2 A/D converters, 3 video cameras, 4 image converters, 5 computing machines, 6 control modules, 7 control centers.

Embodiment:

As shown in the figure, further specify technical scheme of the present invention and working routine in conjunction with example.

Motor vehicle trade mark automatic identification equipment and recognition methods, this automatic identification equipment and recognition methods are by infrared sensor 1, A/D converter 2, video camera 3, image converter 4, computing machine 5, control module 6 and control center 7 constitute, infrared sensing 1 device links to each other with computing machine 5 by A/D converter 2, the control signal end of computing machine 5 links to each other with video camera 3 again, realization is to the control of image real-time acquisition, the video image that video camera 3 is gathered is sent into computing machine 5 frame by frame or by being converted to digital picture by image converter 4, after machine 5 is handled as calculated, the license plate number recognition result is delivered to the relevant vehicle management department of control center 7, charge department and public security management department etc. also can show and monitor simultaneously.Working routine of the present invention is: at first (1) is selected, and selects to adopt license plate identification, still train article No. identification of container article No. identification; (2) is there car not? monitoring by infrared sensor has judged whether car, if car is arranged then images acquired, otherwise waits for; (3) gather, computing machine is by the camera acquisition image, and image converter converts the video image that collects to digitized image; (4) handle digitized image search location, and the position at search car plate place, and accurate location are carried out background color according to the image of car plate locating area and judged whether decision reverses, and unifiedly is the black matrix wrongly written or mispronounced character, if white gravoply, with black engraved characters, then counter-rotating; (5) cut apart, the character of institute's locating area is cut apart, cut apart the back and judge whether each single character is complete character, if not, then proofread and correct and recover and cut apart again, cut apart correctly not if then judge; (6) cut apart correctly not? if then carry out normalized, otherwise cut apart again; (7) normalization is equirotal standard character image with the character normalizing, as 32 * 20, and 38 * 26,36 * 24 etc., M * N image; (8) Classification and Identification, identification letter and numeral or Chinese character; (9) result gives control center with result.

Claims

1, motor vehicle trade mark automatic identification equipment and recognition methods, it is characterized in that, this device is by infrared sensor, A/D converter, image acquisition device, image converter, computing machine and control center form, infrared sensor links to each other with computing machine by A/D converter, the control signal end of computing machine links to each other with image acquisition device again, realization is to the control of image real-time acquisition, the video image that image acquisition device is gathered is sent into computing machine frame by frame or by being converted to digital picture by image converter, after machine is handled as calculated, give control center with the license plate number recognition result, also can show and monitor simultaneously.

2, motor vehicle trade mark automatic identification equipment and recognition methods according to claim 1 is characterized in that, the working routine of identification is automatically:

(1) selects;

(2) is there car not? there is car to start image acquisition device, otherwise awaits orders;

(3) gather the image acquisition device images acquired;

Whether (4) regional location of license plate number in image promptly searched in the search location, and judges the image background color, reverse according to the background color decision of car plate, and unification is the black matrix wrongly written or mispronounced character, if white gravoply, with black engraved characters, then counter-rotating;

(5) cut apart, the single character of license plate number separately, judge cut apart complete not? recover to cut apart again otherwise proofread and correct;

(6) cut apart correctly not? if then carry out normalization, otherwise cut apart again;

(7) normalization is normalized to equirotal standard input character image with character picture;

(8) Classification and Identification, identification letter and numeral or Chinese character;

(9) result gives control center with result.