CN110428637A - A kind of road gate grasp shoot method and road gate capturing system - Google Patents
A kind of road gate grasp shoot method and road gate capturing system Download PDFInfo
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- CN110428637A CN110428637A CN201910673651.XA CN201910673651A CN110428637A CN 110428637 A CN110428637 A CN 110428637A CN 201910673651 A CN201910673651 A CN 201910673651A CN 110428637 A CN110428637 A CN 110428637A
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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
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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
- G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
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- 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
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
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- 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
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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Abstract
The embodiment of the present application discloses a kind of road gate grasp shoot method and road gate capturing system, round-the-clock light filling is carried out for realizing to car, to improve bayonet video capture effect.The embodiment of the present application method is applied to road gate capturing system, which includes laser light filling component and video camera, and wherein the video camera includes the first image-forming assembly and the second image-forming assembly；When vehicle passes through the candid photograph trigger device of the road gate, it is that the vehicle interior carries out light filling, and triggers the candid photograph frame of video camera output at this time which, which triggers the laser light filling component,.Wherein the light filling intensity of the laser light filling component is directly proportional to the light illumination of current environment；While the laser light filling component carries out light filling to the vehicle interior, which generates color image, which generates infrared image；Finally the road gate capturing system captures result according to the color image and infrared image output.
Description
Technical field
This application involves field of video monitoring more particularly to a kind of road gate grasp shoot methods and road gate to capture system
System.
Background technique
All-weather car is realized in present intelligent transportation system (Intelligent Traffic System, ITS)
Interior face snap has important social value to road monitoring.Multiply people this requires road video camera can see interior department clearly daytime
The face feature of member, while imaging cannot influence the normal identification of license plate.
In current ITS application scenarios, high-definition camera usually combines gas to expose flashing light and uses, and has preferable light filling at night
Effect；In strong reflective, the strong backlight scene of daytime, the especially very strong summer day of environment light, exposes flashing light and almost do not have light filling
Effect causes car dim unclear, can not obtain face information in form.Reason is glass for vehicle window, the water surface, high temperature road surface etc.
The reflex similar to mirror surface can be generated.Excessively high reflected light can make widow reflections information be much higher than interior face information, cause
See interior target can not clearly due to the insufficient light of entrance.
Therefore how interior light filling is carried out, and makes that interior to capture effect to reach clear state be urgently to be solved ask
Topic.
Summary of the invention
The embodiment of the present application provides a kind of road gate grasp shoot method and road gate capturing system, for realizing to vehicle
It is interior to carry out round-the-clock light filling, to improve bayonet video capture effect.
In a first aspect, the embodiment of the present application provides a kind of road gate grasp shoot method, it is applied to road gate capturing system,
Wherein the road gate capturing system includes laser light filling component and video camera, wherein the video camera include the first image-forming assembly and
Second image-forming assembly；When vehicle passes through the shooting trigger device of the road gate, which triggers this and swashs
Light light filling component is that the vehicle interior carries out light filling, and triggers the candid photograph frame of video camera output at this time.The wherein laser light filling
The light filling intensity of component is directly proportional to the light illumination of current environment, i.e. the light illumination of current environment is bigger, the laser light filling
The light filling intensity of component is bigger；While the laser light filling component carries out light filling to the vehicle interior, first image-forming assembly
Color image is generated, which generates infrared image；Finally the road gate capturing system is according to the color image
It is exported with the infrared image and captures result.
In the present embodiment, the candid photograph result can be output capture image be also possible to according to require for capture frame in
Content carry out identification output recognition result, specifically herein without limitation.
In technical solution provided by the embodiments of the present application, the activation light filling component is according to the light illumination pair of current environment
Light filling intensity is adjusted, i.e., when the light illumination of external environment is big, light filling intensity is also big, in this way can be in Qiang Fanguang, strong
In the case that backlight causes environment inside car dim, interior light intensity is effectively improved, so that interior candid photograph image reaches
Clear state；And in the light illumination hour of external environment, light filling intensity is also small, can effectively avoid vehicle outer in this way and car
Ambient light illumination difference is too big, to improve the whole effect for capturing image.It can be thus achieved so round-the-clock to car progress
Light filling, so that capturing image effect reaches consistent.
Optionally, which is vertical cavity surface emitting laser (Vertical Cavity Surface
Emitting Laser, VCSEL) laser chip array, wherein the VCSEL laser chip array is high-power V CSEL laser core
Chip arrays, specific Output optical power need to be greater than 25 watts (W).The VCSEL laser chip array may be designed as flash mode,
The flash duration of single light filling is within 10ms, and in specific embodiment, which can be according to video camera
The candid photograph time determine, need it is synchronous with the candid photograph of video camera so that the candid photograph image of car reaches clear state.
The VCSEL laser chip array emitter collimation laser light source, can be improved light filling efficiency, to improve light filling effect.
Optionally, which can be binocular focusing video camera, in this way first image-forming assembly and the second imaging group
Part is respectively a wherein mesh for the binocular focusing video camera.Wherein, first image-forming assembly include the first camera, polarizing film,
Near infrared prevention piece and the first imaging sensor, wherein the polarizing film and the near infrared prevention piece in first camera and are somebody's turn to do
Between first imaging sensor.The front-rear position of the polarizing film and the near infrared prevention piece is herein without limitation.Second imaging
Component includes second camera, infrared narrow-band filter and the second imaging sensor, wherein the infrared narrow-band filter be located at this second
Between camera and second imaging sensor.In the present embodiment, which uses binocular focusing video camera
Cost can be reduced on the basis of guaranteeing output two-way image.
Optionally, the laser light filling component of the road gate capturing system is VCSEL laser chip, wherein the VCSEL swashs
Optical chip array is high-power V CSEL laser chip array, and specific Output optical power needs to be greater than 25 watts (W).The camera shooting
Machine can be binocular focusing video camera, and first image-forming assembly and second image-forming assembly are respectively binocular fixed-focus camera shooting in this way
A wherein mesh for machine.Wherein, which includes the first camera, polarizing film, near infrared prevention piece and the first image
Sensor, wherein the polarizing film and the near infrared prevention piece are between first camera and first imaging sensor.This is partially
Shake piece and the near infrared prevention piece front-rear position herein without limitation.Second image-forming assembly includes second camera, infrared
Narrow-band filter and the second imaging sensor, wherein the infrared narrow-band filter is located at the second camera and second image sensing
Between device.Wherein, the central wavelength of the VCSEL laser chip array is infrared ray wave band, therefore the VCSEL laser chip array
For carrying out infrared light filling to second image-forming assembly.At this moment, the middle cardiac wave of the infrared narrow-band filter in second image-forming assembly
The long central wavelength with the VCSEL laser chip array matches.For example, the central wavelength of the VCSEL laser chip array is
940 nanometers (nm), then the central wavelength of the infrared narrow-band filter is also 940nm.
It optionally, include that the first camera, polarizing film, near infrared prevention piece and the first image pass in first image-forming assembly
When sensor, which can switch over according to the light illumination of current environment with the near infrared prevention piece and combine；It can also be with
Combination is switched over according to the time.Specific embodiment can be such that the road gate capturing system obtains the light of current environment
Illumination；Then when the light illumination is greater than preset threshold, which is determined in first image-forming assembly
Polarizing film is worked at the same time near infrared prevention piece；When the light illumination is less than the preset threshold, the road gate capturing system
Determine the near infrared prevention piece work in first image-forming assembly.The preset threshold can be by user's setting themselves, can also root
It is determined according to the imaging effect of color image.Simultaneously in the present embodiment, which can use double optical filters
Switch (IR-CUT) device switches over the combination of the polarizing film and near infrared prevention piece.
Optionally, the road gate capturing system according to the color image and the infrared image output capture result when,
Can specifically following scheme be used:
In a kind of possible implementation, which obtains the light illumination of current environment；Then at this
When light illumination is greater than preset threshold, which exports the infrared image respectively and the color image is used as and is somebody's turn to do
Capture result；When the light illumination is less than second preset threshold, the road gate capturing system is by the infrared image and is somebody's turn to do
Color image carries out double light fusions and generates candid photograph image, and exports the candid photograph image, and the candid photograph image is as the candid photograph result.
In another way, which carries out double light with the color image for the infrared image and merges life
At candid photograph image, and the candid photograph image is exported, the candid photograph image is as the candid photograph result.
In the present embodiment, for the road gate capturing system when carrying out double light fusion, which can be with
Interior enhancing and license plate overexposure inhibition processing are carried out to infrared image, then again by processed infrared image and color image into
Row fusion generates the candid photograph image.License plate overexposure inhibit processing concrete mode can there are two types of, a kind of mode is the road an outpost of the tax office
Mouth capturing system can be based on the laggard driving board enhancing in intelligent algorithm positioning licence plate region.Another way is the road gate
Two kinds of images are transformed into color space encoder (yuv space) by capturing system, are carried out to the Y-component of color image and infrared image
The linear weighted function inhibited based on overexposure merges to obtain Y ', then merges to form candid photograph figure with the color image by infrared image again
Picture.
Second aspect, the embodiment of the present application provide a kind of road gate capturing system, specifically include: input equipment, laser
Light filling component, video camera and output equipment；Wherein the video camera includes the first image-forming assembly and the second image-forming assembly；The input is set
It is standby, for obtaining trigger signal in shooting trigger device of the vehicle Jing Guo the road gate；The laser light filling component, is used for
Light filling is carried out to the vehicle interior according to the trigger signal, wherein the light filling intensity of the laser light filling component and current environment
Light illumination is directly proportional；First image-forming assembly, for generating color image；Second image-forming assembly, for generating infrared figure
Picture；The output equipment, for capturing result according to the color image and infrared image output.
As can be seen from the above technical solutions, the embodiment of the present application has the advantage that in the road gate capturing system
In, which is adjusted light filling intensity according to the light illumination of current environment, i.e., in the light of external environment
When illumination is big, light filling intensity is also big, can effectively avoid the feelings that environment inside car is dim under strong reflective, strong backlight scene in this way
Condition, so that improving interior candid photograph image effect reaches clear state；And in the light illumination hour of external environment, light filling intensity
Also small, it can effectively avoid the external world related to environment inside car brightness too big in this way, to improve whole candid photograph image effect
Reach clear state.Can be thus achieved in this way and round-the-clock light filling carried out to car so that candid photograph image effect reach consistent.
Detailed description of the invention
Fig. 1 is a block schematic illustration of road gate capturing system in the embodiment of the present application；
Fig. 2 is one embodiment schematic diagram of road gate grasp shoot method in the embodiment of the present application；
Fig. 3 a is a flow diagram of road gate grasp shoot method in the embodiment of the present application；
Fig. 3 b is a flow diagram of road gate grasp shoot method in the embodiment of the present application；
Fig. 4 is a schematic device of road gate capturing system in the embodiment of the present application；
Fig. 5 is another schematic device of road gate capturing system in the embodiment of the present application.
Specific embodiment
The embodiment of the present application provides a kind of road gate grasp shoot method and road gate capturing system, for realizing to vehicle
It is interior to carry out round-the-clock light filling, to improve bayonet video capture effect.
The description and claims of this application and term " first ", " second ", " third ", " in above-mentioned attached drawing
The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage
The data that solution uses in this way are interchangeable under appropriate circumstances, so that the embodiments described herein can be in addition to illustrating herein
Or the sequence other than the content of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that
Cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units need not limit
In step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, produce
The other step or units of product or equipment inherently.
Technical solution provided by the present application be applied to intelligent transportation system (intelligent traffic system,
ITS).All-weather car and interior face snap are realized in the ITS system.In the ITS system, road gate capturing system
System framework as shown in Figure 1, the road gate capturing system includes: input equipment 101, laser light filling component 102, video camera
103 and output equipment 104；Wherein, which includes the first image-forming assembly and the second image-forming assembly.Wherein the input is set
It is standby that including but not limited to the hardware devices such as sensor, camera, sensor, Mike and vibrator, concrete condition user can roots
It is configured according to actual demand.And output equipment includes but is not limited to the hardware devices such as display screen.Wherein the road gate is captured
The method that system carries out road gate shooting in the embodiment of the present application is specific as follows: when vehicle passes through the shooting of the road gate
When trigger device, which obtains trigger signal, and triggers the laser light filling component 102 as vehicle interior progress
Light filling, and trigger the candid photograph frame of the video camera 103 output at this time.The wherein light filling intensity of the laser light filling component 102 and current
The light illumination of environment is directly proportional, i.e. the light illumination of current environment is bigger, and the light filling intensity of the laser light filling component 102 is got over
Greatly；While the laser light filling component 102 carries out light filling to the vehicle interior, which generates color image,
Second image-forming assembly generates infrared image；Finally the output equipment 104 is grabbed according to the color image and infrared image output
Clap result.
In order to be more convenient to understand, the technical terms being related in the embodiment of the present application are illustrated below.
Color image: referring to the image that each pixel is made of R, G, B component, and wherein R, G, B are by different gray levels
Come what is described, refer in the present embodiment by the image of visible photogenerated.
Infrared image: the single channel image that the infrared luminous intensity of object generates is obtained, is referred in the present embodiment by infrared light
The image of generation.
VCSEL laser chip array: VCSEL is the new laser that a kind of vertical surface goes out light.Its feature is specific as follows:
1, the far field and near field distribution of the small angle of divergence and circular symmetry greatly improve the coupling efficiency of itself and optical fiber, without multiple
The beam shaping system of miscellaneous valuableness；Cavity length is extremely short, its longitudinal mode spacing is caused to widen, and can realize in wider temperature range
Single longitudinal mode operation, dynamic modulation frequency are high；Cavity volume reduces so that its sponta-neous emission factor is high compared with common end surface-emitting laser
Several orders of magnitude, this causes many physical characteristics to be greatly improved；Development cost can be significantly reduced with On-wafer measurement；Light out
Direction vertical substrates can be easily carried out the integrated of high density two-dimensional array, realize higher power output.Simultaneously vertical
In on the direction of substrate can parallel arranged multiple lasers be split into laser array.
IR-CUT device: the bis- filters of IR-CUT have referred in cam lens group one group of filter built-in, when outside camera lens
After infrared induction point detects the strong and weak variation of light, built-in IR-CUT automatically switches filter can be according to the strong of extraneous light
It is weak to automatically switch therewith, so that image is reached optimum efficiency.That is, double optical filters can be cut automatically under daytime or night
Filter is changed, therefore whether under daytime or night, optimal imaging effect can be obtained.
The fusion of double light: the infrared image that infrared imaging generates only has brightness (gray scale) information, without colouring information, and it is visible
The color image that light imaging generates has luminance information and colouring information simultaneously.Double light fusion when, it is only necessary to consider how by
The luminance information of infrared image is fused in color image.The method generallyd use is that infrared image and color image are carried out face
Color space transformation (is converted to YUV by RGB), and wherein Y-component indicates luminance component；Then by the luminance component to infrared image
It is merged with the luminance component of color image, promotes visual effect.
Car enhancing: the visual effect in order to promote interior target increases vehicle window region using algorithm for image enhancement
By force, interior contrast is promoted, promotes dark space details, mature Enhancement Method can be used in algorithm for image enhancement, and (such as histogram increases
By force, CLAHE scheduling algorithm).
License plate overexposure inhibits: in the infrared image of generation, license plate position excessively exposes.Therefore it is answered in the fusion of double light
Try to reduce influence of the infrared image to fusion results.Specific implementation, which can be, to be first passed through intelligent algorithm and navigates to license plate position
It sets, especially processing then is made to the fusion of license plate area and (such as is set to be lower than by the blending weight of the pixel of infrared image
Color image reduces influence of the infrared image to fusion results).
Below referring specifically to Fig. 2, one embodiment of road gate image pickup method is as follows in the embodiment of the present application:
201, when vehicle passes through the candid photograph trigger device of road gate, which obtains triggering letter
Number.
When vehicle passes through the road gate, if triggering the shooting trigger device of the road gate, the road gate
Capturing system obtains the trigger signal.
The candid photograph trigger device of the road gate can be range sensor in the present embodiment, for example the road gate is captured
Built-in range sensor in system, when detecting that front preset vehicle occurs apart from interior, then the road gate capturing system obtains
Get the trigger signal；Alternatively, the candid photograph trigger device of the road gate can be earth shock sensor, when vehicle driving arrives
When on the earth shock sensor, which gets the trigger signal；Alternatively, the candid photograph of the road gate
Trigger device can be velocity sensor, and when the travel speed of vehicle is more than preset value, which is obtained
To the trigger signal.Meanwhile the trigger signal can be electric signal or optical signal, specifically herein without limitation.
202, the road gate capturing system according to the trigger signal trigger the laser light filling component be the vehicle interior into
Row light filling, and trigger video camera output candid photograph frame at this time, wherein the light filling intensity and current environment of the laser light filling component
Light illumination it is directly proportional.
The road gate capturing system triggers laser light filling component transmitting light source according to the trigger signal, for being the vehicle
Light filling is carried out inside, and triggers the candid photograph frame of video camera output at this time.Wherein, the light filling intensity of the laser light filling component with
The light illumination of current environment is directly proportional, and the light illumination of even current environment is stronger, then the light filling of the laser light filling component is strong
Degree also enhances, and can effectively improve interior light in the case where Qiang Fanguang, strong backlight scene cause environment inside car dim in this way
Intensity, so that interior candid photograph image reaches clear state；And in the light illumination hour of current environment, light filling intensity
It is small, it can effectively avoid vehicle is outer to differ too big with environment inside car illumination in this way, be reached to improve whole candid photograph image effect
To clear state.It can be thus achieved in this way and round-the-clock light filling carried out to car, so that capturing image effect reaches consistent.
Optionally, which is vertical cavity surface emitting laser (Vertical Cavity Surface
Emitting Laser, VCSEL) laser chip array, wherein the VCSEL laser chip array is high-power V CSEL laser core
Chip arrays, specific Output optical power need to be greater than 25 watts (W).The VCSEL laser array light source design is flash of light mould simultaneously
Formula, the duration of single light filling is within 10ms.The VCSEL light compensating apparatus emits collimation laser light source, and light filling effect can be improved
Rate, to improve light filling effect.In the present embodiment, which be can choose using 25 (its arrangement modes
It can be 5*5 array, be also possible to circular array, as long as an entirety can be constituted, specific implementation is herein not
Limit), the VCSEL laser chip of single 2W power.Meanwhile the road gate capturing system can be somebody's turn to do using current trigger
VCSEL laser chip array emitter pulse type laser, to reach the light filling purpose of interior imaging clearly.The VCSEL laser core
Chip arrays emit collimation laser light source, light filling efficiency can be improved, to improve light filling effect.The VCSEL laser chip battle array simultaneously
The central wavelength for arranging the pulse type laser of transmitting can choose infrared band, can achieve the effect to human eye unaware in this way
Fruit.In the present embodiment, the central wavelength of the pulse type laser of the VCSEL laser chip array emitter can choose 940nm.It can be with
Understand, when the central wavelength of the VCSEL laser chip array is 940nm, is not to say that the VCSEL laser chip array only
The laser that 940nm can be emitted, the wavelength of the laser emitted are likely distributed in 930nm to 950nm range.
203, first image-forming assembly generates color image, while second image-forming assembly generates infrared image.
While the road gate capturing system triggers the laser light filling component to vehicle interior progress light filling, the camera shooting
Machine is also captured simultaneously, and generates color image by first image-forming assembly, is generated by second image-forming assembly infrared
Image.
Optionally, first image-forming assembly and second image-forming assembly can be in an integrated monocular-camera, can also
To be two camera assemblies of a binocular focusing video camera.It is respectively double in first image-forming assembly and second image-forming assembly
When two independent camera assemblies of mesh focusing video camera, which includes the first camera, polarizing film, near-infrared section
Limited step and first sensor, wherein the polarizing film and the near infrared prevention piece are in first camera and first image sensing
Between device.The front-rear position of the polarizing film and the near infrared prevention piece is herein without limitation.Second image-forming assembly includes second
Camera, infrared narrow-band filter and the second imaging sensor, wherein the infrared narrow-band filter be located at the second camera and this
Between two imaging sensors.
Meanwhile including the first camera, polarizing film, near infrared prevention piece and the first image sensing in first image-forming assembly
When device, which can switch over according to the light illumination of current environment with the near infrared prevention piece and combine；It can also root
Combination is switched over according to the time.Specific embodiment can be such that the road gate capturing system obtains the light photograph of current environment
Degree；Then when the light illumination is greater than preset threshold, which determines inclined in first image-forming assembly
Vibration piece is worked at the same time near infrared prevention piece；When the light illumination is less than the preset threshold, the road gate capturing system is true
Near infrared prevention piece work in fixed first image-forming assembly.The preset threshold can be by user's setting themselves, can also basis
The imaging effect of color image determines.Simultaneously in the present embodiment, which can use double optical filters and cuts
Parallel operation (IR-CUT) device switches over the combination of the polarizing film and near infrared prevention piece.If the polarizing film and the near-infrared are cut
Limited step switches over combination according to the time, specifically can be such that and arrives road gate candid photograph between at 6 points in evening at 7 points in the morning
System determines that polarizing film and near infrared prevention piece in first image-forming assembly work at the same time；6 points to the next morning 7 at night
The road gate capturing system determines that the near infrared prevention piece in first image-forming assembly works between point.
It is understood that if the central wavelength of the laser light filling component is infrared band, the laser light filling component
Infrared light filling is carried out to vehicle interior.The laser light filling component of the road gate capturing system can be VCSEL laser chip battle array
Column, wherein the VCSEL laser chip array is high-power V CSEL laser chip array, and specific Output optical power needs are greater than
25 watts (W), while the VCSEL laser chip array may be designed as flash mode, the flash duration of single light filling can be with
Within 10ms, in specific embodiment, which can determine according to the candid photograph time of video camera, need
It is synchronous with the candid photograph of video camera, so that interior candid photograph image reaches clear state.The video camera can be binocular fixed-focus
Video camera, in this way first image-forming assembly and second image-forming assembly are respectively a wherein mesh for the binocular focusing video camera.Its
In, which includes the first camera, polarizing film, near infrared prevention piece and the first imaging sensor, wherein this is partially
Vibration piece and the near infrared prevention piece are between first camera and first imaging sensor.The polarizing film and the near-infrared are cut
The front-rear position of limited step is herein without limitation.Second image-forming assembly includes second camera, infrared narrow-band filter and the second figure
As sensor, wherein the infrared narrow-band filter is located between the second camera and second imaging sensor.Wherein, should
The central wavelength of VCSEL laser chip array is infrared ray wave band, therefore the VCSEL laser chip array is used for this second one-tenth
As component carries out infrared light filling.At this moment, the central wavelength of the infrared narrow-band filter in second image-forming assembly and the VCSEL laser
The central wavelength of chip array matches.For example, the central wavelength of the VCSEL laser chip array is 940 nanometers (nm), then should
The central wavelength of infrared narrow-band filter is also 940nm.
204, the road gate capturing system captures result according to the color image and infrared image output.
In the present embodiment, the candid photograph result can be output capture image be also possible to according to require for capture frame in
Content carry out identification output recognition result, specifically herein without limitation.For example, after the information for capturing vehicle, to vehicle
The license plate number of vehicle, the information such as model, the color of vehicle are identified and exported, and portrait is identified and is exported is
No is criminal or the personnel that commit a crime.
If the candid photograph result is to capture image, the road gate capturing system is according to the color image and the infrared figure
When capturing result as output, can specifically following scheme be used:
In a kind of possible implementation, which obtains the light illumination of current environment；Then at this
When light illumination is greater than preset threshold, which exports the infrared image respectively and the color image is used as and is somebody's turn to do
Capture result；When the light illumination is less than second preset threshold, the road gate capturing system is by the infrared image and is somebody's turn to do
Color image carries out double light fusions and generates candid photograph image, and exports the candid photograph image, and the candid photograph image is as the candid photograph result.This
In embodiment, which can be set by the user, and can also be determined according to the clarity for capturing image.Specifically herein not
It limits.It is understood that can also be determined whether to carry out double light fusions according to the time, for example setting is early in the present embodiment
Upper 7 points to during 6 pm, the road gate capturing system is using the infrared image and the color image as the candid photograph result point
Do not export, and in the afternoon 6 points to during 7 points of morning, the road gate capturing system by the infrared image and the color image into
It is exported again after the double light fusions of row.
In another way, which carries out double light with the color image for the infrared image and merges life
At candid photograph image, and the candid photograph image is exported, the candid photograph image is as the candid photograph result.That is the road gate capturing system can be with
Regardless of the light illumination of current environment, color image and infrared image are subjected to double light fusion generations every time and capture image.
In the present embodiment, for the road gate capturing system when carrying out double light fusion, which can be with
Interior enhancing and license plate overexposure inhibition processing are carried out to infrared image, then again by processed infrared image and color image into
Row fusion generates the candid photograph image.License plate overexposure inhibit processing concrete mode can there are two types of, a kind of mode is the road an outpost of the tax office
Mouth capturing system can be based on the laggard driving board enhancing in intelligent algorithm positioning licence plate region.Another way is the road gate
Two kinds of images are transformed into color space encoder (yuv space) by capturing system, are carried out to the Y-component of color image and infrared image
Based on the linear weighted function fusion that overexposure inhibits, then again infrared image is merged to form candid photograph image with the color image.
Described above is the grasp shoot methods of road gate capturing system, below with reference to road gate shown in Fig. 3 a and Fig. 3 b
It captures process and road gate capturing system shown in Fig. 4 carries out into one the road gate grasp shoot method in the embodiment of the present application
Step explanation:
In Fig. 4, which includes input equipment, VCSEL laser chip array, the first camera,
Polarizing film, near infrared prevention piece, the first imaging sensor, second camera, infrared narrow-band filter and the second imaging sensor；Its
In, the polarizing film and the near infrared prevention piece are in first camera and first imaging sensor, the infrared narrow-band filter position
Between the second camera and second imaging sensor.Specifically, the camera structure in the present embodiment may include:
Optical lens system (two tight shots, i.e. first camera and the second camera)；Photosensitive sensor (two pieces of overall situations
Exposed light transducer, i.e. first imaging sensor and second imaging sensor)；Image-signal processing system.Wherein, the image
Signal processing system is used to deal with the original image that sensor acquire that (for example demosaicing, noise reduction, white balance, color are strong
Just etc.)；Output system, for exporting video or image；Signal synchronizing system, for sending or receiving external signal (as controlled
External laser light filling component shines).In the present embodiment, which is two in addition to optical lens system and photosensitive sensor
Equipment is covered, for acquiring double light path information, other parts software and hardware all only exists a set of.The work of the road gate capturing system
Principle such as Fig. 3 a and as shown in Figure 3b:
It is greater than threshold value while being the light illumination on daytime (such as threshold value restriction), the polarization in the light illumination of current environment
Piece and the near infrared prevention piece work together (such as Fig. 3 a)；
When vehicle is by capturing firing line or ground induction coil (i.e. candid photograph trigger device), road gate capturing system is triggered
Process is captured in starting；And it triggers VCSEL laser chip array and carries out pulse light filling；Then visible light weakens vehicle by the polarizing film
Window is reflective by force, and using near infrared prevention piece filtering infrared light, the colour of vehicle snapshot frame is generated by the first imaging sensor
Image；Visible light leaves behind infrared light by another way infrared narrow band filter, and by generating vehicle on the second imaging sensor
Capture frame infrared image；The color image of vehicle snapshot frame is generated by the first imaging sensor and is passed by the second image
The infrared image that vehicle snapshot frame is generated on sensor can be directly output to intelligent algorithm and make into some processing (as interior face is known
Not, Car license recognition, information of vehicles identification)；The color image of vehicle snapshot frame can also will be generated by the first imaging sensor
It is defeated that fusion color image is generated with the double light fusions of infrared image progress by generating vehicle snapshot frame on the second imaging sensor
It (carries out double light fusions in the present embodiment to be illustrated) out.
It is less than threshold value while being the light illumination in evening (such as threshold value restriction) in the light illumination of current environment, this is close red
Outer cut out tab works independently (such as Fig. 3 b)；
When vehicle is by capturing firing line or ground induction coil (i.e. candid photograph trigger device), road gate capturing system is triggered
Process is captured in starting；And it triggers VCSEL laser chip array and carries out pulse light filling；Then visible light passes through near infrared prevention piece mistake
Infrared light is filtered, the color image of vehicle snapshot frame is generated by the first imaging sensor；Visible light passes through the infrared narrowband of another way
Optical filter leaves behind infrared light, and the infrared image by generating vehicle snapshot frame on the second imaging sensor；Pass through the first figure
The color image and the infrared figure by generating vehicle snapshot frame on the second imaging sensor for generating vehicle snapshot frame as sensor
Make as intelligent algorithm can be directly output into some processing (such as interior recognition of face, Car license recognition, information of vehicles identification)；
The color image of vehicle snapshot frame can will be generated by the first imaging sensor and by generating vehicle on the second imaging sensor
The infrared image for capturing frame carries out double light fusions and generates fusion color images output.
The embodiment of the present application has the advantage that in the road gate capturing system, and the activation light compensating apparatus is according to working as
The light illumination of preceding environment is adjusted light filling intensity, i.e., when the light illumination of external environment is big, light filling intensity is also big, this
Sample can effectively avoid the situation that environment inside car is dim under strong reflective, strong backlight scene, to improve interior candid photograph image
Effect reaches clear state；And in the light illumination hour of external environment, light filling intensity is also small, can effectively avoid so outer
Boundary is related to environment inside car brightness too big, so that improving whole candid photograph image effect reaches clear state.It in this way can be real
Round-the-clock light filling now is carried out to car, so that capturing image effect reaches consistent.
Described above is road gate image pickup methods in the embodiment of the present application, below to the road an outpost of the tax office in the embodiment of the present application
Mouth capturing system is described:
Referring specifically to Fig. 1, one embodiment of road gate capturing system includes: input equipment in the embodiment of the present application
101, laser light filling component 102, video camera 103 and output equipment 104；Wherein, the video camera 103 include the first image-forming assembly and
Second image-forming assembly.
Optionally, which can be as shown in Figure 5, wherein the laser light filling component 102 is vertical cavity
Surface-emitting laser VCSEL laser chip array.
Optionally, which is binocular focusing video camera, which includes the first camera, polarization
Piece, near infrared prevention piece and the first imaging sensor, wherein the polarizing film and the near infrared prevention piece first camera with
Between first imaging sensor；
Second image-forming assembly includes second camera, infrared narrow-band filter and the second imaging sensor, wherein this is infrared
Narrow-band filter is between the second camera and second imaging sensor.
Optionally, which switches the polarizing film and the near infrared prevention according to the light illumination of current environment
The filter of piece combines.
Optionally, which is VCSEL laser chip array, the center of the VCSEL laser chip array
Wavelength is infrared ray wave band, which is used to carry out infrared light filling to second image-forming assembly, wherein should
Second image-forming assembly includes second camera, infrared light narrow-band filter and the second imaging sensor, wherein the infrared narrow-band filter
In second camera shooting between second imaging sensor, the central wavelength of the infrared light narrow-band filter and the VCSEL laser
The central wavelength of chip array matches.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the application
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
The above, above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although referring to before
Embodiment is stated the application is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.
Claims (16)
1. a kind of road gate grasp shoot method is applied to road gate capturing system, wherein the road gate capturing system packet
Laser light filling component, video camera are included, the video camera includes: the first image-forming assembly, the second image-forming assembly, which is characterized in that packet
It includes:
In candid photograph trigger device of the vehicle Jing Guo the road gate, the road gate capturing system triggers the laser and mends
Optical assembly carries out light filling to the vehicle interior, and triggers the video camera output and capture frame, wherein the laser light filling component
Light filling intensity it is directly proportional to the light illumination of current environment；
First image-forming assembly generates color image；
Second image-forming assembly generates infrared image；
The road gate capturing system captures result according to the color image and infrared image output.
2. the method according to claim 1, wherein the laser light filling component is vertical cavity surface emitting laser
VCSEL laser chip array.
3. the method according to claim 1, wherein the video camera be binocular focusing video camera, described first
Image-forming assembly include the first camera, polarizing film, near infrared prevention piece and the first imaging sensor, wherein the polarizing film and
The near infrared prevention piece is between first camera and the first image sensor；
Second image-forming assembly includes second camera, infrared narrow-band filter and the second imaging sensor, wherein described infrared
Narrow-band filter is between the second camera and second imaging sensor.
4. according to the method described in claim 3, it is characterized in that, first image-forming assembly shines according to the light of current environment
Degree switches the polarizing film and combines with the filter of the near infrared prevention piece.
5. method according to claim 4, which is characterized in that first image-forming assembly generates color image and includes:
The road gate capturing system obtains the light illumination of the current environment；
When the light illumination is greater than the first preset threshold, polarizing film and the near infrared prevention in first image-forming assembly
Piece works at the same time, and generates the color image；
When the light illumination is less than first preset threshold, near infrared prevention piece work described in first image-forming assembly
Make, and generates the color image.
6. the method according to any one of claims 1 to 5, which is characterized in that the laser light filling component swashs for VCSEL
Optical chip array, the central wavelength of the VCSEL laser chip array are infrared ray wave band, the VCSEL laser chip display
For carrying out infrared light filling to second image-forming assembly, wherein second image-forming assembly includes second camera, infrared light
Narrow-band filter and the second imaging sensor, wherein the infrared narrow-band filter is in the second camera and second image
Between sensor, the central wavelength phase of the central wavelength of the infrared light narrow-band filter and the VCSEL laser chip array
Match.
7. method according to any one of claim 1 to 6, which is characterized in that the road gate capturing system system root
Capturing result according to the color image and infrared image output includes:
The road gate capturing system obtains the light illumination of the current environment；
When the light illumination is greater than the second preset threshold, the road gate capturing system exports the infrared image respectively
With the color image as the candid photograph result；
The light illumination be less than second preset threshold when, the road gate capturing system by the infrared image with
The double light fusions of color image progress, which generate, captures images, and exports the candid photograph image, described in the candid photograph image conduct
Capture result.
8. method according to any one of claim 1 to 6, which is characterized in that the road gate capturing system according to
The color image and infrared image output shooting result include:
The infrared image is carried out double light with the color image and merges generation candid photograph image by the road gate capturing system,
And the candid photograph image is exported, the candid photograph image is as the candid photograph result.
9. a kind of road gate capturing system characterized by comprising input equipment, laser light filling component, video camera and output
Equipment；
The video camera includes the first image-forming assembly and the second image-forming assembly；
The input equipment, for obtaining trigger signal in shooting trigger device of the vehicle Jing Guo the road gate；
The laser light filling component, for carrying out light filling to the vehicle interior according to the trigger signal, wherein the laser
The light filling intensity of light filling component is directly proportional to the light illumination of current environment；
First image-forming assembly, for generating color image；
Second image-forming assembly, for generating infrared image；
The output equipment, for capturing result according to the color image and infrared image output.
10. system according to claim 9, which is characterized in that the laser light filling component is VCSEL laser chip battle array
Column.
11. system according to claim 9, which is characterized in that the video camera be binocular focusing video camera, described first
Image-forming assembly include the first camera, polarizing film, near infrared prevention piece and the first imaging sensor, wherein the polarizing film and
The near infrared prevention piece is between first camera and the first image sensor；
Second image-forming assembly includes second camera, infrared narrow-band filter and the second imaging sensor, wherein described infrared
Narrow-band filter is between the second camera and second imaging sensor.
12. system according to claim 11, which is characterized in that first image-forming assembly is according to the light of current environment
Illumination switches the polarizing film and combines with the filter of the near infrared prevention piece.
13. system according to claim 12, which is characterized in that the input equipment is also used to obtain and described works as front ring
The light illumination in border；
First image-forming assembly is specifically used for when the light illumination is greater than the first preset threshold, the first imaging group
Polarizing film is worked at the same time with the near infrared prevention piece in part, and generates the color image；It is less than institute in the light illumination
When stating the first preset threshold, the work of near infrared prevention piece described in first image-forming assembly, and generate the color image.
14. the system according to any one of claim 9 to 13, which is characterized in that the laser light filling component is VCSEL
Laser chip array, the central wavelength of the VCSEL laser chip array are infrared ray wave band, the VCSEL laser chip battle array
Column are for carrying out infrared light filling to second image-forming assembly, wherein second image-forming assembly includes second camera, infrared
Light narrow-band filter and the second imaging sensor, wherein the infrared light narrow-band filter is in second camera shooting to described second
Between imaging sensor, the central wavelength of the central wavelength of the infrared light narrow-band filter and the VCSEL laser chip array
Match.
15. the system according to any one of claim 9 to 14, which is characterized in that the input equipment, for obtaining
State the light illumination of current environment；
The output equipment is specifically used for exporting the infrared figure respectively when the light illumination is greater than the second preset threshold
Picture and the color image are as the candid photograph result；It, will be described when the light illumination is less than second preset threshold
Infrared image carries out double light with the color image and merges generation candid photograph image, and exports the candid photograph image, the candid photograph figure
As being used as the candid photograph result.
16. the system according to any one of claim 9 to 14, which is characterized in that the output equipment, being specifically used for will
The infrared image carries out double light with the color image and merges generation candid photograph image, and exports the candid photograph image, described to grab
Image is clapped as the candid photograph result.
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Application publication date: 20191108 |