CN201946113U - License plate recognition device with high-definition image snapshot function - Google Patents

Abstract

The utility model relates to a license plate recognition device with a high-definition image snapshot function, which comprises a snapshot image module and an image recognition module, wherein the snapshot image module is connected with an FPGA (field programmable gate array) module, a driving circuit module and a CCD (charge coupled device) module sequentially, and the FPGA module is provided with a trigger module and a light compensation control module. The license plate recognition device has the advantages of high quality image snapshot, high recognition rate of license plates, low operation cost, wide application range, good compatibility, etc.

Description

A kind of license plate identification device with high definition candid photograph image function

Technical field

The utility model relates to the road traffic field, particularly a kind of license plate identification device with high definition candid photograph image function.

Background technology

In today that road traffic system more and more tends to intelligent development, traffic information acquisition system is undoubtedly the basis of intelligent transportation system.In numerous data acquisition technologys, vehicle license recognition technology (License Plate Recognition--LPR) is a very important core technology.It is one is the special purpose computer vision system of object with the specific objective.Up to the present, General-Purpose Computer Vision System Research remains the difficult problem that current scientific circles do not capture as yet.Tracing it to its cause mainly is that current series machine structure is difficult to be fit to do artificial intelligent vision work fully, adds other various factorss, causes present vehicle license recognition effect not fully up to expectations.

Under ideal conditions, though existing license plate identification device can be finished the function of license plate identification, but put into when using in the daily life, vehicle license discrimination, accuracy of information are subjected to influences such as multiple factor such as weather, light, car plate be stained, and effect is had a greatly reduced quality and specifically had following 3 drawbacks:

One, candid photograph picture quality is low: the front end of electronic police is captured equipment and is mostly adopted civil equipment, and what frequency of utilization was maximum is the product of Olympus and Kodak's series.Because the digital camera that uses of electronic police is normal domestic equipment but not the technical grade product researched and developed as electronic police specially, so itself there are many defectives.Inapplicable continuous working in rugged surroundings, especially under situations such as sunshine direct projection, dazzle light direct projection, valid pixel is low, and imaging is clear inadequately.The license plate identification part, itself does not have secondary light source, needs in addition additional high-power secondary light source; Influenced by the existing drawback of the image scanning of SD video camera own, one two field picture resolution maximum of SD shot by camera has only the 768*576 pixel, pass through the staggered scanning of camera-scanning system again, the image maximum that actual acquisition is got off also has only the 768*288 pixel, and these factors directly cause image quality decrease; The image field range is little, can not satisfy the use of some special occasions.

Two, the license plate identification rate is low: can not work alone, and be by computer processor and picture pick-up device.Because the car plate identifying is serialized, the first step does not collect high-quality vehicle image information, can cause work such as subsequent images pre-service, character recognition differentiation, feature extraction to carry out, and greatly reduces the license plate identification rate.

Three, operating cost height, system's scope of application is little, poor compatibility.

The utility model content

The purpose of this utility model is to provide a kind of low, applied widely, compatible good license plate identification device with high definition candid photograph image function of picture quality height, license plate identification rate height and operating cost of capturing.

For achieving the above object, the utility model provides a kind of license plate identification device that high definition is captured image function that has, it comprises captures image module and picture recognition module, it is characterized in that: described candid photograph image module comprises successively the FPGA module that connects, drive circuit module, and CCD module, and wherein said FPGA module is provided with trigger module and light filling control module.

Further, described have high definition and capture the front of the license plate identification device of image function and be provided with camera lens, and described light filling control module is provided with the light filling stroboscope light, described light filling stroboscope light be arranged on described camera lens around.

Further, described picture recognition module comprises successively the CDS correlating double sampling circuit module that connects, PGA programmable gain amplifier module, ADC analog-to-digital conversion circuit module, and DSP digital signal processing module, and described correlating double sampling circuit module is connected with described CCD module.

Further, described license plate identification device with high definition candid photograph image function also comprises the output unit that is connected with the DSP digital signal processing module.

Further, described side with license plate identification device of high definition candid photograph image function also is provided with the positional information GPS module of obtaining vehicle.

Further, but described have high definition and capture the side of the license plate identification device of image function and also be provided with the keyboard jack that the donating bond dish inserts.

Further, described side with license plate identification device of high definition candid photograph image function also comprises 3G, GPRS or the CDMA module of transmission information.

The beneficial effects of the utility model are: adopt the FPGA module be provided with trigger module and light filling control module, and CCD module, can under multiple shutter speed, carry out sequence image and capture, can be when high vehicle speeds images acquired, do not lose car to greatest extent.Described light filling control module is provided with the light filling stroboscope light, makes the image resolution ratio of capturing be: 1360*1024.Thereby guarantee the quality of higher candid photograph image.But described picture recognition module efficient identification is damaged, tilts, hangs upside down, etc. special licence plate.Can adapt to various rugged surroundings weathers, realize round-the-clock continuous working.In addition, the license plate identification device with high definition candid photograph image function described in the utility model also has low, applied widely, the compatible good advantage of operating cost.

Description of drawings

Fig. 1 meets a kind of structural representation that high definition is captured the license plate identification device of image function that has of the present utility model;

Fig. 2 is the described stereographic map with license plate identification device of high definition candid photograph image function of Fig. 1;

Fig. 3 is described another visual angle stereographic map with license plate identification device of high definition candid photograph image function of Fig. 1.

Below in conjunction with accompanying drawing the utility model patent is described in further detail.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.But content of the present utility model is not only limited to so.

Referring to Fig. 1 and Fig. 2, meet a kind of license plate identification device that high definition is captured image function that has of the present utility model, it comprises captures image module 1 and picture recognition module 2.Described candid photograph image module 1 comprises successively the FPGA module 11 that connects, drive circuit module 12, and CCD module 13.Wherein said FPGA module 11 is provided with trigger module 111 and light filling control module 112.Described light filling control module 112 is provided with lightfilling stroboscope light 113.

Described picture recognition module 2 comprises successively the CDS correlating doublesampling circuit module 21 that connects, PGA programmable gain amplifier module 22, ADC analog-to-digital conversion circuit module 23, and DSP digital signal processing module 24, and described CDS correlating double sampling circuit module is connected with described CCD module 13.Described license plate identification device with high definition candid photograph image function also comprises the output unit 3 that is connected with DSP digital signal processing module 24.

Described have high definition and capture the front of the license plate identification device of image function and be provided with camera lens 4, and described light filling control module 112 is provided with lightfilling stroboscope light 113, described lightfilling stroboscope light 113 be arranged on described camera lens 4 around.

Please refer to Fig. 3 and Fig. 2, described license plate identification device with high definition candid photograph image function is provided with positional information GPS module 5 and thekeyboard jack 6 that obtains vehicle in the one side.Describedkeyboard jack 6 can insert a keyboard 8 be used for initialization system, regulating system parameter, be provided with or provide when breaking down manual candid photograph button to the function of system in system.Described license plate identification device with high definition candid photograph image function also is provided with 3G, GPRS or the CDMA module 7 of transmission information in its another side.

Described in the utility model have high definition and capture the license plate identification device of image function and adopt the FPGA module that is provided with trigger module and light filling control module, and CCD module, can carry out sequence image under multiple shutter speed captures, can be when high vehicle speeds images acquired, do not lose car to greatest extent.Described light filling control module is provided with the light filling stroboscope light, makes the image resolution ratio of capturing be: 1360*1024.Thereby guarantee the quality of higher candid photograph image.But described picture recognition module efficient identification is damaged, tilts, hangs upside down, etc. special licence plate.Can adapt to various rugged surroundings weathers, realize round-the-clock continuous working.In addition, the license plate identification device with high definition candid photograph image function described in the utility model also has low, applied widely, the compatible good advantage of operating cost.

Above embodiment only is used to illustrate the utility model, but not is used to limit the utility model.

Claims (7)

1. one kind has the license plate identification device that high definition is captured image function, it comprises captures image module (1) and picture recognition module (2), it is characterized in that: described candid photograph image module (1) comprises successively the FPGA module (11) that connects, drive circuit module (12), and CCD module (13), and wherein said FPGA module (11) is provided with trigger module (111) and light filling control module (112).

2. the license plate identification device with high definition candid photograph image function as claimed in claim 1, it is characterized in that: described front with license plate identification device of high definition candid photograph image function is provided with camera lens (4), described light filling control module (112) is provided with light filling stroboscope light (113), described light filling stroboscope light (113) be arranged on described camera lens (4) around.

3. the license plate identification device with high definition candid photograph image function as claimed in claim 1, it is characterized in that: described picture recognition module (2) comprises successively the CDS correlating double sampling circuit module (21) that connects, PGA programmable gain amplifier module (22), ADC analog-to-digital conversion circuit module (23), and DSP digital signal processing module (24), and described CDS correlating double sampling circuit module (21) is connected with described CCD module (13).

4. the license plate identification device with high definition candid photograph image function as claimed in claim 3 is characterized in that: also comprise the output unit (3) that is connected with DSP digital signal processing module (24).

5. as claim 1,2,3 or 4 described license plate identification devices with high definition candid photograph image function, it is characterized in that: described side with license plate identification device of high definition candid photograph image function also is provided with the positional information GPS module (5) of obtaining vehicle.

6. as claim 1,2,3 or 4 described license plate identification devices, it is characterized in that with high definition candid photograph image function: but described side with license plate identification device of high definition candid photograph image function also is provided with the keyboard jack (6) that the donating bond dish inserts.

7. as claim 1,2,3 or 4 described license plate identification devices with high definition candid photograph image function, it is characterized in that: described side with license plate identification device of high definition candid photograph image function also is provided with 3G, GPRS or the CDMA module (7) of transmission information.

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