CN205992291U - A kind of license plate recognition device based on FPGA - Google Patents
A kind of license plate recognition device based on FPGA Download PDFInfo
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- CN205992291U CN205992291U CN201620467118.XU CN201620467118U CN205992291U CN 205992291 U CN205992291 U CN 205992291U CN 201620467118 U CN201620467118 U CN 201620467118U CN 205992291 U CN205992291 U CN 205992291U
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- wire
- fpga
- license plate
- fpga module
- image
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Abstract
The utility model discloses a kind of license plate recognition device based on FPGA, it includes photographic head, and photographic head is connected with FPGA module wire, and FPGA module is connected by wire with SDRAM memory and light-emitting diode display, and FPGA module is connected by wire with host computer；This utility model is identified to license plate image processing using FPGA module, have the advantages that small volume, low cost, recognition speed be fast, degree of accuracy is high, solve the problems, such as that existing license plate recognition device is difficult to active balance at aspects such as recognition speed, degree of accuracy, cost, development difficulties.
Description
Technical field
This utility model belongs to electronic control system field, more particularly, to a kind of license plate recognition device based on FPGA.
Background technology
Since the 90's of 20th century, along with the high speed development of Chinese national economy, increasingly the carrying of living standards of the people
Height, motor vehicles scale and quantity increase considerably, meanwhile, automobile crime and steal car case also showed increased.Due to car
Violate the traffic regulations, and the vehicle accident causing is of common occurrence, therefore, people increasingly pay attention to the traffic safety in city.
How applying effective means to carry out monitor in real time Traffic Information, to increasingly become relevant departments of China of interest
Focus.For the vehicle accident problem causing because violation is violating the regulations, people's application message acquisition technique, information processing skill
Art, information transmission technology etc. are developed road traffic monitoring system etc. highway communication can be carried out with monitor in real time and go forward side by side row information
The system of feedback carrys out the problem of solving road traffic.
Vehicle License Plate Recognition System is dedicated system theory on computer vision and technology being applied to vehicle license automatic identification,
It is that computer vision is processed and integrated application in intelligent transportation field for the mode identification technology, further related to inclusion image simultaneously
Process, artificial intelligence, theory of information, communication technology, engineering is in interior many gate techniques, so its existing important theoretical research meaning
Justice, it may have good actual application value.
In existing license plate recognition technology, implementation mainly has the pure software algorithm on PC platform, or ARM, DSP put down
Platform.System constructed by PC platform haves the shortcomings that volume is larger, poor real, and ARM, DSP platform have circuit design
The shortcomings of complicated, exploitation debugging is difficult, expansibility is poor is it is impossible to realize the side such as recognition speed, degree of accuracy, cost, development difficulty
The active balance in face.
Utility model content
The technical problems to be solved in the utility model is：A kind of license plate recognition device based on FPGA is provided, existing to solve
License plate recognition device is had to be difficult to the problem of active balance at aspects such as recognition speed, degree of accuracy, cost, development difficulties.
Technical solutions of the utility model：
A kind of license plate recognition device based on FPGA, it includes photographic head, and photographic head is connected with FPGA module wire, FPGA
Module is connected by wire with SDRAM memory and light-emitting diode display, and FPGA module is connected by wire with host computer.
Described photographic head is cmos image sensor.
Described FPGA module includes I2C sensor and cmos image collecting unit, cmos image collecting unit and image
Converting unit wire connects, and image conversion unit is connected with image pre-processing unit wire, and image pre-processing unit is controlled with SDRAM
Device wire processed connects, and sdram controller is connected with image identification unit wire, image identification unit and LED controller and USB
Blaster interface unit wire connects.
Sdram controller is multiport sdram controller.
The beneficial effects of the utility model：
This utility model is based on FPGA module, reads target image by cmos image sensor, image is delivered to CMOS
Image acquisition units and image pre-processing unit are stored in SDRAM memory after form conversion, pretreatment, image recognition
Unit reads the image information in SDRAM memory by multiport sdram controller, carries out image recognition, LED controller root
Show license board information in real time according to license plate recognition result, and host computer is sent to by USB Blaster interface unit recognition result；
Compared with existing license plate recognition device, this utility model is identified to license plate image processing using FPGA module, has body
Long-pending little, the advantages of low cost, recognition speed are fast, degree of accuracy is high, solve existing license plate recognition device in recognition speed, accurately
The aspects such as degree, cost, development difficulty are difficult to the problem of active balance.
Brief description
Fig. 1 is this utility model structural representation；
Fig. 2 is this utility model FPGA structure schematic diagram.
Specific embodiment：
A kind of license plate recognition device based on FPGA, it includes photographic head, and photographic head is connected with FPGA module wire, FPGA
Module is connected by wire with SDRAM memory and light-emitting diode display, and FPGA module is connected by wire with host computer.
Described photographic head is cmos image sensor.
Described FPGA module includes I2C sensor and cmos image collecting unit, cmos image collecting unit and image
Converting unit wire connects, and image conversion unit is connected with image pre-processing unit wire, and image pre-processing unit is controlled with SDRAM
Device wire processed connects, and sdram controller is connected with image identification unit wire, image identification unit and LED controller and USB
Blaster interface unit wire connects.
FPGA module is connected with host computer by USB Blaster interface unit.
FPGA module is connected with light-emitting diode display by LED controller.
Sdram controller is multiport sdram controller.
Photographic head is cmos image sensor, the TRDB-D5M photographic head being provided using Terasic company.TRDB-D5M takes the photograph
As head has 500W pixel, it is connected by GPIO with FPGA module.Meanwhile, TRDB-D5M photographic head has I2C interface, permissible
By I2C agreement, the inner parameter of this photographic head and external parameter are demarcated.Additionally, TRDB-D5M imageing sensor is
Luminous energy can be effectively converted to voltage signal, be equipped with a small amount of control signal by the pel array of 2592H × 1944V, just can be straight
It is connected on the pin of chip and obtain 10 RGB image initial datas.
FPGA module adopt altera corp Cyclone III series EP3C10E144C8N chip, it can compatibility how electric
Pressure I/O, device kernel and I/O individually power.Its utilize TSMC 65nm low-power consumption technique, and provide abundant logic,
Memorizer and DSP function.EP3C10E144C8N contains 120K logical block（LEs）, 288 Digital Signal Processing（DSP）Multiplication
Device, memorizer reaches 4Mbits, is very beneficial for the structure of system.
LED controller, primarily to producing the control signal of light-emitting diode display, the recognition result of car plate is shown in real time
To on light-emitting diode display.
Claims (3)
1. a kind of license plate recognition device based on FPGA, it include photographic head it is characterised in that：Photographic head and FPGA module wire
Connect, FPGA module is connected by wire with SDRAM memory and light-emitting diode display, FPGA module is with host computer by wire even
Connect；Described FPGA module includes I2C sensor and cmos image collecting unit, and cmos image collecting unit is single with image conversion
First wire connects, and image conversion unit is connected with image pre-processing unit wire, and image pre-processing unit is led with sdram controller
Line connects, and sdram controller is connected with image identification unit wire, image identification unit and LED controller and USB Blaster
Interface unit wire connects.
2. a kind of license plate recognition device based on FPGA according to claim 1 it is characterised in that：Described photographic head is
Cmos image sensor.
3. a kind of license plate recognition device based on FPGA according to claim 1 it is characterised in that：Sdram controller is
Multiport sdram controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620467118.XU CN205992291U (en) | 2016-05-23 | 2016-05-23 | A kind of license plate recognition device based on FPGA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620467118.XU CN205992291U (en) | 2016-05-23 | 2016-05-23 | A kind of license plate recognition device based on FPGA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205992291U true CN205992291U (en) | 2017-03-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620467118.XU Expired - Fee Related CN205992291U (en) | 2016-05-23 | 2016-05-23 | A kind of license plate recognition device based on FPGA |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205992291U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020056545A1 (en) * | 2018-09-17 | 2020-03-26 | 深圳鲲云信息科技有限公司 | Ai implementation method using fpga hardware, and related product |
| CN112750313A (en) * | 2020-12-31 | 2021-05-04 | 上海易维视科技有限公司 | FPGA-based video acquisition and parking lot license plate recognition system and method |
-
2016
- 2016-05-23 CN CN201620467118.XU patent/CN205992291U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020056545A1 (en) * | 2018-09-17 | 2020-03-26 | 深圳鲲云信息科技有限公司 | Ai implementation method using fpga hardware, and related product |
| CN111527747A (en) * | 2018-09-17 | 2020-08-11 | 深圳鲲云信息科技有限公司 | Method for realizing AI (Artificial Intelligence) by adopting FPGA (field programmable Gate array) hardware and related product |
| CN112750313A (en) * | 2020-12-31 | 2021-05-04 | 上海易维视科技有限公司 | FPGA-based video acquisition and parking lot license plate recognition system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170301 |