CN104408931A - Incomplete sign license plate identification system and method - Google Patents
Incomplete sign license plate identification system and method Download PDFInfo
- Publication number
- CN104408931A CN104408931A CN201410592336.1A CN201410592336A CN104408931A CN 104408931 A CN104408931 A CN 104408931A CN 201410592336 A CN201410592336 A CN 201410592336A CN 104408931 A CN104408931 A CN 104408931A
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- vehicle
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
- G08G1/0175—Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/50—Context or environment of the image
- G06V20/56—Context or environment of the image exterior to a vehicle by using sensors mounted on the vehicle
- G06V20/58—Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
- G06V20/584—Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads of vehicle lights or traffic lights
Abstract
The invention discloses an incomplete sign license plate identification system and method. The method comprises the following steps: a vehicle detection device monitors whether a vehicle goes into an image acquisition area and sends a trigger signal to an image acquisition device when detecting that the vehicle arrives at the area; the image acquisition device, after receiving the trigger signal sent by the vehicle detection device, acquiring a current video image; the vehicle identification device receiving the video image sent by the image acquisition device, positions a license plate position on the video image, segments characters in a license plate for identification and performs matching and comparison on the characters which cannot be identified in a unique mode so as to determine the characters; and then forming a license plate number. According to the invention, the number of the vehicle license plate whose characters are partially shielded can be accurately and timely identified.
Description
Technical field
The present invention relates to field of license plate recognition, particularly relate to a kind of incomplete symbol Vehicle License Plate Recognition System and method.
Background technology
VLPR (Vehicle License Plate Recognition, license plate recognition technology) can detect that the vehicle on monitored road surface also automatically extracts vehicle license information (containing Chinese character, English alphabet, arabic numeral and number plate color) and processes.VLPR, based on the technology such as Digital Image Processing, pattern-recognition, computer vision, analyzes the vehicle image of shot by camera or video sequence, obtains the number-plate number that each automobile is unique, thus complete identifying.Parking lot fee collection management, the measurement of magnitude of traffic flow Con trolling index, vehicle location, automobile burglar, high way super speed robotization supervision, electronic eye used for catching red light runner, toll station etc. function can be realized by some subsequent treatment means.VLPR, for safeguarding traffic safety and urban public security, prevents traffic jam, realizes the meaning that traffic automation management has reality.
In practical application, the discrimination of Vehicle License Plate Recognition System also with licence plate quality and shooting quality closely related, licence plate quality can be subject to the impact of various factors, and as got rusty, stained, paint flake, font are faded, licence plate is blocked; These influence factors reduce the discrimination of Car license recognition in varying degrees.Such as, in vehicle travel process, if by the bad section of the road conditions such as mud pit, often have dirt and splash on car plate, some numeral, letter on car plate are blocked, cause cannot accurately and timely identifying the correct number-plate number.
Summary of the invention
In order to solve the technical matters existed in background technology, the present invention proposes a kind of incomplete symbol Vehicle License Plate Recognition System and method, the number plate of vehicle realized partial character is blocked accurately and timely identifies.
The present invention proposes a kind of incomplete symbol Vehicle License Plate Recognition System, comprising:
Whether vehicle equipment, enter image acquisition region for monitor vehicle, when detecting that vehicle arrives this region, sends trigger pip to image capture device;
Image capture device, is connected with vehicle equipment, for receive vehicle equipment send trigger pip after gather current video image;
Car license recognition equipment, being connected with image capture device, for receiving the video image that image capture device sends, orienting licence plate position at this video image, Character segmentation in licence plate is out identified, matching ratio is carried out to determining character to the character that cannot uniquely identify; Then license number is formed.
Preferably, vehicle equipment is that peripheral hardware triggers, and refers to that adopting coil, infrared or other detecting devices to detect vehicle sends trigger pip by during signal.
Preferably, vehicle equipment is that video triggers, and refers to and adopts dynamic motion target sequence image analyzing and processing technology, detects track in real time and to get on the bus a moving state, find vehicle by time send trigger pip.
Preferably, Car license recognition equipment specifically comprises:
First judging unit, for judging whether all characters after splitting can uniquely be determined, if can uniquely determine, then illustrate that identifying normal character then directly forms license number and export, if cannot uniquely determine, then illustrate that None-identified goes out normal character;
Screening unit, is connected with the first judging unit, during for judging that some letter part is blocked, carrying out screening identify the part that is not blocked, then dope all possible character according to this character factor such as position, stroke trend partly that is not blocked;
Sequencing unit, is connected, for sorting according to possibility size to these characters with screening unit; By these prediction characters, combine with other factors such as vehicle appearance shape, color;
Confirmation unit, is connected with sequencing unit, for combined information is sent to information of vehicles storehouse, searches in the vehicle information database prestored, finds the vehicle of all information matches, thus determines the actual number plate information of this vehicle.
The invention allows for a kind of incomplete symbol licence plate recognition method, comprise the following steps:
Whether vehicle equipment monitor vehicle enters image acquisition region, when detecting that vehicle arrives this region, sends trigger pip to image capture device;
Image capture device gathers current video image after receiving the trigger pip of vehicle equipment transmission;
Car license recognition equipment receives the video image that image capture device sends, and orienting licence plate position, the Character segmentation in licence plate is out identified, carrying out matching ratio to determining character to the character that cannot uniquely identify at this video image; Then license number is formed.
Preferably, the described character to cannot uniquely identify carries out matching ratio to determining character, specifically comprises:
Judge whether all characters after splitting can uniquely be determined, if can uniquely determine, then illustrate that identifying normal character then directly forms license number and export, if cannot uniquely determine, then illustrates that None-identified goes out normal character;
When judging that some letter part is blocked, screening is carried out to the part that is not blocked and identifies, then dope all possible character according to this character factor such as position, stroke trend partly that is not blocked;
These characters are sorted according to possibility size; By these prediction characters, combine with other factors such as vehicle appearance shape, color;
Combined information is sent to information of vehicles storehouse, searches in the vehicle information database prestored, find the vehicle of all information matches, thus determine the actual number plate information of this vehicle.
Preferably, also comprise:
Adopt coil, infrared or other detecting devices to detect vehicle and send trigger pip by during signal; Or adopt dynamic motion target sequence image analyzing and processing technology, detect track in real time and to get on the bus a moving state, find vehicle by time send trigger pip.
In the present invention, by not being blocked to character on car plate, part identifies, dopes all possible character, and sort according to possibility size to these characters according to factors such as its position, stroke trends; According to these prediction characters, combine with other factors such as vehicle appearance shape, color, search in the vehicle information database prestored, find the vehicle of all information matches, thus determine the actual number plate information of this vehicle.
Accompanying drawing explanation
Fig. 1 is the one incomplete symbol Vehicle License Plate Recognition System structural drawing that the embodiment of the present invention 1 proposes;
Fig. 2 is the one incomplete symbol licence plate recognition method process flow diagram that the embodiment of the present invention 2 proposes.
Embodiment
As shown in Figure 1, Fig. 1 is the one incomplete symbol Vehicle License Plate Recognition System structural drawing that the embodiment of the present invention 1 proposes.
With reference to Fig. 1, the embodiment of the present invention 1 proposes a kind of incomplete symbol Vehicle License Plate Recognition System, comprising:
Whether vehicle equipment 10, enter image acquisition region for monitor vehicle, when detecting that vehicle arrives this region, sends trigger pip to image capture device 20.Wherein, vehicle equipment 10 has two kinds of triggering modes: one is that peripheral hardware triggers, and refers to that adopting coil, infrared or other detecting devices to detect vehicle sends trigger pip by during signal; Another kind is that video triggers, and refers to and adopts dynamic motion target sequence image analyzing and processing technology, detects track in real time and to get on the bus a moving state, find vehicle by time send trigger pip.
Image capture device 20, is connected with vehicle equipment 10, for receive vehicle equipment 10 send trigger pip after gather current video image.
Car license recognition equipment 30, being connected with image capture device 20, for receiving the video image that image capture device 20 sends, orienting licence plate position at this video image, Character segmentation in licence plate is out identified, matching ratio is carried out to determining character to the character that cannot uniquely identify; Then license number is formed.Wherein, row matching ratio is to determining that character process specifically comprises: judge whether all characters after splitting can uniquely be determined, if can uniquely determine, then illustrate that identifying normal character then directly forms license number and export, if cannot uniquely determine, then illustrate that None-identified goes out normal character, and when judging that some letter part is blocked, screening can be carried out to the part that is not blocked to identify, the position of the part that is not then blocked according to this character, the factors such as stroke trend dope all possible character, and these characters are sorted according to possibility size, by these prediction characters, combine with other factors such as vehicle appearance shape, colors, combined information is sent to information of vehicles storehouse, searches in the vehicle information database prestored, find the vehicle of all information matches, thus determine the actual number plate information of this vehicle.
Wherein, Car license recognition equipment 30 specifically comprises:
Judging unit 31, for judging whether all characters after splitting can uniquely be determined, if can uniquely determine, then illustrate that identifying normal character then directly forms license number and export, if cannot uniquely determine, then illustrate that None-identified goes out normal character;
Screening unit 32, is connected with judging unit 31, during for judging that some letter part is blocked, carrying out screening identify the part that is not blocked, then dope all possible character according to this character factor such as position, stroke trend partly that is not blocked;
Sequencing unit 33, is connected, for sorting according to possibility size to these characters with screening unit 32; By these prediction characters, combine with other factors such as vehicle appearance shape, color;
Confirmation unit 34, is connected with sequencing unit 33, for combined information is sent to information of vehicles storehouse, searches in the vehicle information database prestored, finds the vehicle of all information matches, thus determines the actual number plate information of this vehicle.
As shown in Figure 2, Fig. 2 is the one incomplete symbol licence plate recognition method process flow diagram that the embodiment of the present invention 2 proposes.
With reference to Fig. 2, the embodiment of the present invention 2 proposes a kind of incomplete symbol licence plate recognition method, comprises the following steps:
Step 101, whether vehicle equipment monitor vehicle enters image acquisition region, when detecting that vehicle arrives this region, sends trigger pip to image capture device;
Step 102, image capture device gathers current video image after receiving the trigger pip of vehicle equipment transmission;
Step 103, Car license recognition equipment receives the video image that image capture device sends, and orienting licence plate position, the Character segmentation in licence plate is out identified, carrying out matching ratio to determining character to the character that cannot uniquely identify at this video image; Then license number is formed.
The described character to cannot uniquely identify carries out matching ratio to determining character, specifically comprises:
Judge whether all characters after splitting can uniquely be determined, if can uniquely determine, then illustrate that identifying normal character then directly forms license number and export, if cannot uniquely determine, then illustrates that None-identified goes out normal character;
When judging that some letter part is blocked, screening is carried out to the part that is not blocked and identifies, then dope all possible character according to this character factor such as position, stroke trend partly that is not blocked;
These characters are sorted according to possibility size; By these prediction characters, combine with other factors such as vehicle appearance shape, color;
Combined information is sent to information of vehicles storehouse, searches in the vehicle information database prestored, find the vehicle of all information matches, thus determine the actual number plate information of this vehicle.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (7)
1. an incomplete symbol Vehicle License Plate Recognition System, is characterized in that, comprising:
Whether vehicle equipment (10), enter image acquisition region for monitor vehicle, when detecting that vehicle arrives this region, sends trigger pip to image capture device (20);
Image capture device (20), is connected with vehicle equipment (10), after receiving trigger pip that vehicle equipment (10) sends, gather current video image;
Car license recognition equipment (30), be connected with image capture device (20), for receiving the video image that image capture device (20) sends, licence plate position is oriented at this video image, Character segmentation in licence plate is out identified, matching ratio is carried out to determining character to the character that cannot uniquely identify; Then license number is formed.
2. incomplete symbol Vehicle License Plate Recognition System according to claim 1, is characterized in that, vehicle equipment (10) is that peripheral hardware triggers, and refers to that adopting coil, infrared or other detecting devices to detect vehicle sends trigger pip by during signal.
3. incomplete symbol Vehicle License Plate Recognition System according to claim 1, it is characterized in that, vehicle equipment (10) is video triggering, refer to and adopt dynamic motion target sequence image analyzing and processing technology, get on the bus a moving state in real-time detection track, find vehicle by time send trigger pip.
4. incomplete symbol Vehicle License Plate Recognition System according to claim 1, is characterized in that, Car license recognition equipment (30) specifically comprises:
Judging unit (31), for judging whether all characters after splitting can uniquely be determined, if can uniquely determine, then illustrate that identifying normal character then directly forms license number and export, if cannot uniquely determine, then illustrate that None-identified goes out normal character;
Screening unit (32), be connected with judging unit (31), during for judging that some letter part is blocked, screening being carried out to the part that is not blocked and identifies, then dope all possible character according to this character factor such as position, stroke trend partly that is not blocked;
Sequencing unit (33), is connected, for sorting according to possibility size to these characters with screening unit (32); By these prediction characters, combine with other factors such as vehicle appearance shape, color;
Confirmation unit (34), be connected with sequencing unit (33), for combined information is sent to information of vehicles storehouse, search in the vehicle information database prestored, find the vehicle of all information matches, thus determine the actual number plate information of this vehicle.
5. an incomplete symbol licence plate recognition method, is characterized in that, comprise the following steps:
Whether vehicle equipment monitor vehicle enters image acquisition region, when detecting that vehicle arrives this region, sends trigger pip to image capture device;
Image capture device gathers current video image after receiving the trigger pip of vehicle equipment transmission;
Car license recognition equipment receives the video image that image capture device sends, and orienting licence plate position, the Character segmentation in licence plate is out identified, carrying out matching ratio to determining character to the character that cannot uniquely identify at this video image; Then license number is formed.
6. incomplete symbol licence plate recognition method according to claim 5, is characterized in that, the described character to cannot uniquely identify carries out matching ratio to determining character, specifically comprises:
Judge whether all characters after splitting can uniquely be determined, if can uniquely determine, then illustrate that identifying normal character then directly forms license number and export, if cannot uniquely determine, then illustrates that None-identified goes out normal character;
When judging that some letter part is blocked, screening is carried out to the part that is not blocked and identifies, then dope all possible character according to this character factor such as position, stroke trend partly that is not blocked;
These characters are sorted according to possibility size; By these prediction characters, combine with other factors such as vehicle appearance shape, color;
Combined information is sent to information of vehicles storehouse, searches in the vehicle information database prestored, find the vehicle of all information matches, thus determine the actual number plate information of this vehicle.
7. incomplete symbol licence plate recognition method according to claim 5, is characterized in that, also comprise:
Adopt coil, infrared or other detecting devices to detect vehicle and send trigger pip by during signal; Or adopt dynamic motion target sequence image analyzing and processing technology, detect track in real time and to get on the bus a moving state, find vehicle by time send trigger pip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410592336.1A CN104408931A (en) | 2014-10-29 | 2014-10-29 | Incomplete sign license plate identification system and method |
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| CN201410592336.1A CN104408931A (en) | 2014-10-29 | 2014-10-29 | Incomplete sign license plate identification system and method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105321352A (en) * | 2015-11-16 | 2016-02-10 | 深圳市哈工大交通电子技术有限公司 | A motor vehicle license plate blocking violation detection and evidence obtaining method |
| CN105844266A (en) * | 2016-06-12 | 2016-08-10 | 桂林金铱星科技发展有限公司 | Occlusion and alteration-preventing license plate recognition system and method |
| CN106056919A (en) * | 2016-08-09 | 2016-10-26 | 成都联众智科技有限公司 | License-plate automatic identification system |
| CN106354516A (en) * | 2016-09-27 | 2017-01-25 | 浙江宇视科技有限公司 | Method and device for tracking equipment |
| US9773194B2 (en) | 2016-01-28 | 2017-09-26 | Longsand Limited | Select type of test image based on similarity score to database image |
| CN108229483A (en) * | 2018-01-11 | 2018-06-29 | 中国计量大学 | Based on the doorplate pressed characters identification device under caffe and soft triggering |
| CN110046615A (en) * | 2019-04-12 | 2019-07-23 | 太原理工大学 | A kind of mining assistant conveyance information of vehicles automatic identifying method |
| CN110502990A (en) * | 2019-07-17 | 2019-11-26 | 上海展湾信息科技有限公司 | The method and system of data acquisition are carried out using image procossing |
| CN110867083A (en) * | 2019-11-20 | 2020-03-06 | 浙江宇视科技有限公司 | Vehicle monitoring method, device, server and machine-readable storage medium |
| CN111914833A (en) * | 2020-06-05 | 2020-11-10 | 华南理工大学 | Moving vehicle license plate recognition system and method |
| CN112184928A (en) * | 2015-09-28 | 2021-01-05 | 西安艾润物联网技术服务有限责任公司 | Parking lot vehicle access control method and device |
| CN113554893A (en) * | 2021-07-16 | 2021-10-26 | 山东新一代信息产业技术研究院有限公司 | Parking space early warning method, equipment and medium based on artificial intelligence |
| CN114220273A (en) * | 2021-12-23 | 2022-03-22 | 东方世纪科技股份有限公司 | Road safety prompting and alarming method and system |
| CN115116152A (en) * | 2022-06-21 | 2022-09-27 | 江苏重行信息科技有限公司 | ZigBee-based intelligent parking lot charging management system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112184928A (en) * | 2015-09-28 | 2021-01-05 | 西安艾润物联网技术服务有限责任公司 | Parking lot vehicle access control method and device |
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| CN108229483A (en) * | 2018-01-11 | 2018-06-29 | 中国计量大学 | Based on the doorplate pressed characters identification device under caffe and soft triggering |
| CN110046615A (en) * | 2019-04-12 | 2019-07-23 | 太原理工大学 | A kind of mining assistant conveyance information of vehicles automatic identifying method |
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| CN111914833A (en) * | 2020-06-05 | 2020-11-10 | 华南理工大学 | Moving vehicle license plate recognition system and method |
| CN111914833B (en) * | 2020-06-05 | 2022-01-11 | 华南理工大学 | Moving vehicle license plate recognition system and method |
| CN113554893A (en) * | 2021-07-16 | 2021-10-26 | 山东新一代信息产业技术研究院有限公司 | Parking space early warning method, equipment and medium based on artificial intelligence |
| CN114220273A (en) * | 2021-12-23 | 2022-03-22 | 东方世纪科技股份有限公司 | Road safety prompting and alarming method and system |
| CN115116152A (en) * | 2022-06-21 | 2022-09-27 | 江苏重行信息科技有限公司 | ZigBee-based intelligent parking lot charging management system |
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Application publication date: 20150311 |