CN108540736A - Infrared laser illuminates the camera chain of Color License Plate - Google Patents
Infrared laser illuminates the camera chain of Color License Plate Download PDFInfo
- Publication number
- CN108540736A CN108540736A CN201810292114.6A CN201810292114A CN108540736A CN 108540736 A CN108540736 A CN 108540736A CN 201810292114 A CN201810292114 A CN 201810292114A CN 108540736 A CN108540736 A CN 108540736A
- Authority
- CN
- China
- Prior art keywords
- infrared laser
- license plate
- image
- light source
- control module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/33—Transforming infrared radiation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Closed-Circuit Television Systems (AREA)
- Studio Devices (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention discloses the camera chains that a kind of infrared laser illuminates Color License Plate, which includes Infrared laser emission device, image collecting device and control module；The Infrared laser emission device includes infrared laser light source and beam converter, the beam converter is placed between infrared laser light source and target license plate, the target license plate is connected by image collecting device with control module, and the control module also Infrared laser emission device is connected, infrared laser light source emits infrared laser light beam, infrared laser light beam is expanded into the beam and focus more than target license plate size after adjusting laser beam hot spot by beam converter, and is irradiated in target license plate；Described image harvester acquires the image information from target license plate, and is sent to control module.Advantage of the invention is that using infrared laser light beam, do not influenced by ambient visible light, no light pollution invisible to human eye, therefore the system Image Acquisition accuracy rate is high.
Description
Technical field
The present invention relates to the video camera systems that field of license plate recognition more particularly to a kind of infrared laser illuminate Color License Plate
System.
Background technology
Current motor vehicles are more and more, and automated intelligent Vehicle License Plate Recognition System is widely used to parking lot and highway
The fields such as charge station, greatly easy charge formality and automobile monitoring.Car plate camera chain in Vehicle License Plate Recognition System
Quality is directly related to the accuracy of license board information extraction, and car plate camera chain now on the market is easy by external environment
Influence, and there are light pollution when car plate is taken pictures.
Invention content
Shortcoming present in view of the above technology, the present invention provide a kind of camera shooting of infrared laser illumination Color License Plate
Machine system, the advantage of the system are to use infrared laser light beam, not influenced by ambient visible light, nothing invisible to human eye
Light pollution, the system Image Acquisition accuracy rate are high.
To achieve the above object, the present invention provides a kind of camera chain of infrared laser illumination Color License Plate, including red
Outer laser beam emitting device, image collecting device and control module；The Infrared laser emission device include infrared laser light source and
Beam converter, the beam converter are placed between infrared laser light source and target license plate, and the target license plate passes through figure
As harvester is connected with control module, and the control module also Infrared laser emission device is connected；
The infrared laser light source emits infrared laser light beam, and infrared laser light beam adjusts laser beam light by beam converter
It is expanded into the beam and focus more than target license plate size after spot, and is irradiated in target license plate；Described image harvester
The image information from target license plate is acquired, and is sent to control module, the control module processing infrared laser irradiation scattering
Black and white picture has been obtained after the information returned；
When if external world's visible light is brighter or when extraneous visible light deficiency, automobile lamp can be opened, and what is scattered in target license plate is visible
Light can be fainter, and what image collecting device obtained is car plate color information and faint detail pictures；
Control module handles color information and faint detail view of the black and white picture obtained by infrared laser with extraneous visible light scattering
As clearly car plate coloured image can be obtained after synthesis.
Wherein, the control module includes Infrared laser emission control unit and image processing unit, the infrared laser
Emission controlling unit is connected with infrared laser light source, and described image processing unit is connected with image collecting device, described
Infrared laser emission control unit controls the size of infrared laser light source transmitting light source, and described image processing unit is to Image Acquisition
Device the image collected information is handled.
Wherein, described image harvester includes picture receiver and accessory part, and described image receiver passes through auxiliary
Component is connected with image processing unit, is transmitted again after the processing that the collected light of described image receiver passes through accessory part
To image processing unit.
Wherein, the accessory part includes the optical filter and use for ending the wavelength light incidence in addition to infrared laser
The lens group being arranged in order before and after the lens for assembling image beam or by multiple lens.
Wherein, the infrared laser light source uses laser diode LED or vertical cavity surface emitting laser VCSEL.
Wherein, the beam converter is diffusion sheet, lens, lens group or diffraction optical element DOE.
The beneficial effects of the invention are as follows：Compared with prior art, infrared laser provided by the invention illuminates Color License Plate
Camera chain, which includes mainly Infrared laser emission device, image collecting device and control module, and infrared laser is sent out
Injection device includes infrared laser light source and beam converter, and in order to obtain complete license plate image, infrared laser light beam needs to irradiate
Laser beam to entire target license plate, infrared laser light source outgoing cannot be met the requirements, it is necessary to which it is appropriate to be carried out to laser beam
Adjustment.Infrared laser light source can adjust laser beam hot spot after beam converter, by adding beam converter so that
Obtained license plate image is more complete；The color information of black and white picture obtained by infrared laser and extraneous visible light scattering and faint
Clearly car plate coloured image can be obtained after detail pictures synthesis so that obtained car plate colour information accuracy rate is high.This
The advantage of invention is, using infrared laser light beam, not influenced by ambient visible light, no light pollution invisible to human eye, because
This system Image Acquisition accuracy rate is high.
Description of the drawings
Fig. 1 is the structural schematic diagram that the infrared laser of the present invention illuminates the camera chain of Color License Plate；
Fig. 2 is that Infrared laser emission device laser beam propagates schematic diagram；
Fig. 3 is that image collecting device license board information collects schematic diagram.
Specific implementation mode
In order to more clearly state the present invention, the present invention is further described below in conjunction with the accompanying drawings.
Referring to Fig. 1, the camera chain of infrared laser illumination Color License Plate provided by the invention, including infrared laser hair
Injection device 1, image collecting device 2 and control module 3；The Infrared laser emission device includes infrared laser light source 11 and light beam
Converter 12, the beam converter are placed between infrared laser light source and target license plate 4, and the target license plate passes through image
Harvester is connected with control module, and the control module also Infrared laser emission device is connected；
The infrared laser light source emits infrared laser light beam, and infrared laser light beam adjusts laser beam light by beam converter
It is expanded into the beam and focus more than target license plate size after spot, and is irradiated in target license plate；Described image harvester
The image information from target license plate is acquired, and is sent to control module, the control module processing infrared laser irradiation scattering
Black and white picture has been obtained after the information returned；
When if external world's visible light is brighter or when extraneous visible light deficiency, automobile lamp can be opened, and what is scattered in target license plate is visible
Light can be fainter, and what image collecting device obtained is car plate color information and faint detail pictures；
Control module handles color information and faint detail view of the black and white picture obtained by infrared laser with extraneous visible light scattering
As clearly car plate coloured image can be obtained after synthesis.
Compared to the prior art, the camera chain of infrared laser illumination Color License Plate provided by the invention, system master
To include Infrared laser emission device, image collecting device and control module, and Infrared laser emission device includes infrared laser
Light source and beam converter, in order to obtain complete license plate image, infrared laser light beam needs to be irradiated to entire target license plate, infrared
The laser beam of laser light source outgoing cannot be met the requirements, it is necessary to carry out adjustment appropriate to laser beam.Infrared laser light source
Laser beam hot spot can be adjusted after beam converter, by adding beam converter so that obtained license plate image is more
Completely；Energy after black and white picture obtained by infrared laser is synthesized with the color information of extraneous visible light scattering and faint detail pictures
Obtain clearly car plate coloured image so that obtained car plate colour information accuracy rate is high.Advantage of the invention is that using
Infrared laser light beam, is not influenced by ambient visible light, invisible to human eye, no light pollution, therefore the system Image Acquisition is accurate
True rate is high.
In the present embodiment, the control module 3 includes Infrared laser emission control unit and image processing unit, described
Infrared laser emission control unit is connected with infrared laser light source, and described image processing unit is connected with image collecting device
It connects, the size of the Infrared laser emission control unit control infrared laser light source transmitting light source, described image processing unit pair
Image acquisition device to image information handled.Certainly, control module is not limited to the structure of above-mentioned appearance, also
It may include other component.
In the present embodiment, described image harvester 2 includes picture receiver 23 and accessory part, and described image receives
Device is connected by accessory part with image processing unit, the place that the collected light of described image receiver passes through accessory part
Image processing unit is transmitted further to after reason.The accessory part includes for ending the wavelength light incidence in addition to infrared laser
Optical filter 21 and the lens 22 for assembling image beam or the lens group by being arranged in order before and after multiple lens.It is described infrared
Laser light source uses laser diode LED or vertical cavity surface emitting laser VCSEL.The beam converter is diffusion sheet, thoroughly
Mirror, lens group or diffraction optical element DOE.
Fig. 2 is that Infrared laser emission device laser beam propagates schematic diagram, in order to obtain complete license plate image, infrared laser light
Beam needs to be irradiated to entire car plate, and the laser beam of infrared laser light source outgoing cannot be met the requirements, it is necessary to laser beam into
Row adjustment appropriate.Infrared laser light source 11 emits the laser beam of infrared band, this light beam after beam converter 2 by that can adjust
Whole laser beam hot spot.Infrared laser light source and beam converter are mutually matched, the outgoing of different infrared laser light sources
Laser facula is not quite similar, and beam converter is also just corresponding different.
Fig. 3 is that image collecting device license board information collects schematic diagram, and the image information light returned on car plate is more miscellaneous, passes through
The light beam that other wave bands can be filtered out after optical filter 21, to reduce the influence of other light.In order to collect enough car plates
Information, general receiving aperture all can be bigger, but the photosensitive region of picture receiver part 23 all very littles, it is therefore desirable to lens 22
Or lens group assembles light.
The operation principle of the present invention is that：Using infrared laser illuminate obtain car plate coloured image mechanism be：By infrared
What back scattered information was obtained through image collecting device after laser irradiation car plate is black and white picture, this black and white picture has car plate
Detailed information but no color information, are not influenced by extraneous visible light；When extraneous visible light is brighter or extraneous visible light
Automobile lamp can be opened when insufficient, and the visible light scattered on car plate can be fainter, and what image collecting device obtained is car plate color
Multimedia message and faint detail pictures；The color information of black and white picture obtained by infrared laser and extraneous visible light scattering and faint thin
Clearly car plate coloured image can be obtained after section image synthesis.
Disclosed above is only several specific embodiments of the present invention, but the present invention is not limited to this, any ability
What the technical staff in domain can think variation should all fall into protection scope of the present invention.
Claims (6)
1. a kind of camera chain of infrared laser illumination Color License Plate, which is characterized in that including Infrared laser emission device, figure
As harvester and control module；The Infrared laser emission device includes infrared laser light source and beam converter, the light
Beam converter is placed between infrared laser light source and target license plate, and the target license plate passes through image collecting device and control mould
Block is connected, and the control module also Infrared laser emission device is connected；
The infrared laser light source emits infrared laser light beam, and infrared laser light beam adjusts laser beam light by beam converter
It is expanded into the beam and focus more than target license plate size after spot, and is irradiated in target license plate；Described image harvester
The image information from target license plate is acquired, and is sent to control module, the control module processing infrared laser irradiation scattering
Black and white picture has been obtained after the information returned；
When if external world's visible light is brighter or when extraneous visible light deficiency, automobile lamp can be opened, and what is scattered in target license plate is visible
Light can be fainter, and what image collecting device obtained is car plate color information and faint detail pictures；
Control module handles color information and faint detail view of the black and white picture obtained by infrared laser with extraneous visible light scattering
As clearly car plate coloured image can be obtained after synthesis.
2. the camera chain of infrared laser illumination Color License Plate according to claim 1, which is characterized in that the control
Module includes Infrared laser emission control unit and image processing unit, the Infrared laser emission control unit and infrared laser
Light source is connected, and described image processing unit is connected with image collecting device, the Infrared laser emission control unit control
The size of infrared laser light source processed transmitting light source, the image information that described image processing unit arrives image acquisition device into
Row processing.
3. the camera chain of infrared laser illumination Color License Plate according to claim 2, which is characterized in that described image
Harvester includes picture receiver and accessory part, and described image receiver is connected by accessory part with image processing unit
It connects, image processing unit is transmitted further to after the processing that the collected light of described image receiver passes through accessory part.
4. the camera chain of infrared laser illumination Color License Plate according to claim 3, which is characterized in that the auxiliary
Component includes the optical filter for ending the wavelength light incidence in addition to infrared laser and the lens for assembling image beam
Or the lens group by being arranged in order before and after multiple lens.
5. the camera chain of infrared laser illumination Color License Plate according to claim 1, which is characterized in that described infrared
Laser light source uses laser diode LED or vertical cavity surface emitting laser VCSEL.
6. the camera chain of infrared laser illumination Color License Plate according to claim 1, which is characterized in that the light beam
Converter is diffusion sheet, lens, lens group or diffraction optical element DOE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292114.6A CN108540736A (en) | 2018-04-03 | 2018-04-03 | Infrared laser illuminates the camera chain of Color License Plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292114.6A CN108540736A (en) | 2018-04-03 | 2018-04-03 | Infrared laser illuminates the camera chain of Color License Plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108540736A true CN108540736A (en) | 2018-09-14 |
Family
ID=63482283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810292114.6A Pending CN108540736A (en) | 2018-04-03 | 2018-04-03 | Infrared laser illuminates the camera chain of Color License Plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108540736A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110428637A (en) * | 2019-07-24 | 2019-11-08 | 华为技术有限公司 | A kind of road gate grasp shoot method and road gate capturing system |
| CN110490187A (en) * | 2019-05-31 | 2019-11-22 | 杭州海康威视数字技术股份有限公司 | Car license recognition equipment and method |
| CN113615936A (en) * | 2021-08-31 | 2021-11-09 | 浙江奥云数据科技有限公司 | Intelligent system for shoe customization |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130265438A1 (en) * | 2012-04-09 | 2013-10-10 | Sony Corporation | Imaging apparatus, imaging method, and camera system |
| CN104407488A (en) * | 2014-12-19 | 2015-03-11 | 咸洋 | Laser-assisted vehicle information shooting device and shooting method |
| CN104966071A (en) * | 2015-07-03 | 2015-10-07 | 武汉烽火众智数字技术有限责任公司 | Infrared light supplement based night license plate detection and recognition method and apparatus |
| CN204719324U (en) * | 2015-05-08 | 2015-10-21 | 山东神戎电子股份有限公司 | A kind of laser night-vision device penetrating plated film vehicle glass |
| CN105578063A (en) * | 2015-07-14 | 2016-05-11 | 宇龙计算机通信科技(深圳)有限公司 | Image processing method and terminal |
| CN106060364A (en) * | 2016-07-28 | 2016-10-26 | 浙江宇视科技有限公司 | Optical fog-penetrating color image acquisition method and camera |
| CN106572339A (en) * | 2016-10-27 | 2017-04-19 | 深圳奥比中光科技有限公司 | Image collector and image collecting system |
| CN107563971A (en) * | 2017-08-12 | 2018-01-09 | 四川精视科技有限公司 | A kind of very color high-definition night-viewing imaging method |
-
2018
- 2018-04-03 CN CN201810292114.6A patent/CN108540736A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130265438A1 (en) * | 2012-04-09 | 2013-10-10 | Sony Corporation | Imaging apparatus, imaging method, and camera system |
| CN104407488A (en) * | 2014-12-19 | 2015-03-11 | 咸洋 | Laser-assisted vehicle information shooting device and shooting method |
| CN204719324U (en) * | 2015-05-08 | 2015-10-21 | 山东神戎电子股份有限公司 | A kind of laser night-vision device penetrating plated film vehicle glass |
| CN104966071A (en) * | 2015-07-03 | 2015-10-07 | 武汉烽火众智数字技术有限责任公司 | Infrared light supplement based night license plate detection and recognition method and apparatus |
| CN105578063A (en) * | 2015-07-14 | 2016-05-11 | 宇龙计算机通信科技(深圳)有限公司 | Image processing method and terminal |
| CN106060364A (en) * | 2016-07-28 | 2016-10-26 | 浙江宇视科技有限公司 | Optical fog-penetrating color image acquisition method and camera |
| CN106572339A (en) * | 2016-10-27 | 2017-04-19 | 深圳奥比中光科技有限公司 | Image collector and image collecting system |
| CN107563971A (en) * | 2017-08-12 | 2018-01-09 | 四川精视科技有限公司 | A kind of very color high-definition night-viewing imaging method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110490187A (en) * | 2019-05-31 | 2019-11-22 | 杭州海康威视数字技术股份有限公司 | Car license recognition equipment and method |
| CN110490187B (en) * | 2019-05-31 | 2022-04-15 | 杭州海康威视数字技术股份有限公司 | License plate recognition device and method |
| CN110428637A (en) * | 2019-07-24 | 2019-11-08 | 华为技术有限公司 | A kind of road gate grasp shoot method and road gate capturing system |
| CN113615936A (en) * | 2021-08-31 | 2021-11-09 | 浙江奥云数据科技有限公司 | Intelligent system for shoe customization |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20120002045A1 (en) | Non-retro-reflective license plate imaging system | |
| CN108540736A (en) | Infrared laser illuminates the camera chain of Color License Plate | |
| CN207530934U (en) | A kind of dual camera module with infrared imaging function | |
| US8358337B2 (en) | Pupil detection device and pupil detection method | |
| JP4297876B2 (en) | Imaging apparatus, light source control method, and computer program | |
| EP1993279A3 (en) | Modulated light trigger for license plate recognition cameras | |
| AU8409091A (en) | Surveillance apparatus particularly for use in viewing vehicle number-plates | |
| CN105737054B (en) | A kind of projection head lamp system for motor vehicle | |
| CN103543575A (en) | Image acquisition device and light source assisted photographing method | |
| CN110428637A (en) | A kind of road gate grasp shoot method and road gate capturing system | |
| CN105044899A (en) | Night vision device based on low light level imaging and implementation method thereof | |
| CN109475023B (en) | Light control device | |
| CN201097067Y (en) | Video camera device | |
| CN104469116A (en) | Star level bayonet all-in-one machine | |
| CN206908701U (en) | A kind of Vehicular night vision system | |
| CN204559711U (en) | Image monitoring system | |
| US6370335B1 (en) | Flash unit for 3D photography | |
| CN203191671U (en) | Hunting camera and illumination automatic regulating system thereof | |
| CN102192787A (en) | Infrared imaging detection system | |
| CN204719324U (en) | A kind of laser night-vision device penetrating plated film vehicle glass | |
| CN108944658A (en) | A kind of new vehicle Intelligent light system and its method of operation | |
| CN204256339U (en) | A kind of laser assisted information of vehicles capturing apparatus | |
| CN105122315A (en) | Image-capturing system for capturing images of features of an identification document | |
| CN109963084B (en) | Infrared camera lighting device for pedestrian detection | |
| CN212305473U (en) | Image acquisition device for road vehicle safety detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180914 |