CN108021877A - Face identification method, apparatus and system in a kind of driving vehicle - Google Patents
Face identification method, apparatus and system in a kind of driving vehicle Download PDFInfo
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- CN108021877A CN108021877A CN201711234918.2A CN201711234918A CN108021877A CN 108021877 A CN108021877 A CN 108021877A CN 201711234918 A CN201711234918 A CN 201711234918A CN 108021877 A CN108021877 A CN 108021877A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/161—Detection; Localisation; Normalisation
- G06V40/166—Detection; Localisation; Normalisation using acquisition arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/50—Context or environment of the image
- G06V20/59—Context or environment of the image inside of a vehicle, e.g. relating to seat occupancy, driver state or inner lighting conditions
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Abstract
The embodiment of the present invention discloses face identification method, apparatus and system in a kind of driving vehicle, by the entrance vehicle image for monitoring and obtaining region to be detected；Track and position the vehicle location into vehicle image；The vehicle location is the horizontal distance into vehicle distances video acquisition device in vehicle image；Flashing light activation threshold value is exposed when the vehicle location reaches, the transmission triggering exposure flashing light instruction and image capture instruction, so as to the exposure flashing light opening and the Image Acquisition of video acquisition device；The corresponding image into vehicle under the exposure flashing light open mode is obtained, and recognition of face is carried out to it.Recognition of face in driving vehicle not only can accurately be realized using technical solution of the present invention, can also be associated with face characteristic information by vehicle characteristic information.
Description
Technical field
The present invention relates to the face identification method in image identification technical field, more particularly to a kind of driving vehicle, device
And system.
Background technology
With the fast development of society, vehicle has become the main means of transport of people.Though existing traffic monitoring camera
The vehicle characteristics such as car plate, vehicle can so be accurately identified, but can not realize and the identity of occupant is identified.This
It is because Traffic Camera is in order to see car plate clearly, specific aim exposure has been carried out to car plate in imaging, has made what car plate was well imaged
Meanwhile also causing beyond car plate other regional imaging quality to decline, the face of occupant is just wherein.Further, since vehicle
Windshield and pad pasting have low light transmission from inside to outside, from outside to inside the characteristics of high printing opacity, plus surrounding environment light, sunlight and glass
The reflective combined influence of glass itself, the image-forming condition of in-car object are congenital poor.Based on two aspect factors superposition described above most
Captured picture is caused to be beyond recognition the face of driving vehicle internal staff completely eventually.
The content of the invention
To overcome problems of the prior art, the present invention provides face identification method, dress in a kind of driving vehicle
Put and system；
A kind of first aspect of the embodiment of the present invention, there is provided the face identification method in driving vehicle；This method includes：
Monitor and obtain the entrance vehicle image in region to be detected；
Track and position the vehicle location into vehicle image；The vehicle location enters vehicle image to be described
The horizontal distance of middle vehicle distances video acquisition device；
Flashing light activation threshold value is exposed when the vehicle location reaches, the triggering exposure flashing light instruction is sent and Image Acquisition refers to
Order, so as to the exposure flashing light opening and the Image Acquisition of video acquisition device；
The corresponding image into vehicle under the exposure flashing light open mode is obtained, and recognition of face is carried out to it.
A kind of second aspect of the embodiment of the present invention, there is provided the face identification device in driving vehicle；The device includes：
Image monitoring module, for monitoring and obtaining the entrance vehicle image in region to be detected；
Image trace locating module, for tracking and positioning the vehicle location into vehicle image；The vehicle
Position is the horizontal distance into vehicle distances video acquisition device in vehicle image；
Information sending module, for exposing flashing light activation threshold value when the vehicle location reaches, sends and triggers the exposure flashing light
Instruction and image capture instruction, so as to the exposure flashing light opening and the Image Acquisition of video acquisition device；
Face recognition module, for obtaining the corresponding image into vehicle under the exposure flashing light open mode, and
Recognition of face is carried out to it.
The third aspect of the embodiment of the present invention, there is provided the face identification system in a kind of driving vehicle, including：Light filling list
Member, imaging unit and image identification unit；The light filling unit includes：Expose flashing light；The imaging unit includes：Polariscope and regard
Frequency harvester；
The light filling unit, the triggering for receiving the transmission of described image recognition unit exposes flashing light instruction, according to the instruction
Triggering exposes flashing light；
The imaging unit, for receive described image recognition unit transmission startup polariscope instruction and and image adopt
Collection instruction；Polariscope is started according to the startup polariscope instruction；The exposure that will be collected according to described image acquisition instructions
The corresponding image into vehicle is sent to described image recognition unit under flashing light open mode；
Described image recognition unit, for obtaining the corresponding figure into vehicle under the exposure flashing light open mode
Picture, and recognition of face is carried out to it.
The fourth aspect of the embodiment of the present invention, there is provided a kind of smart camera, including：Face in driving vehicle as described above
Identification device.
5th aspect of the embodiment of the present invention, there is provided a kind of industrial personal computer, including：Face in driving vehicle as described above is known
Other device.
Technical solution provided in an embodiment of the present invention, by the entrance vehicle image for monitoring and obtaining region to be detected；With
Track simultaneously positions the vehicle location into vehicle image；The vehicle location enters vehicle distances in vehicle image to be described
The horizontal distance of video acquisition device；Flashing light activation threshold value is exposed when the vehicle location reaches, the triggering exposure flashing light is sent and refers to
Order and image capture instruction, so as to the exposure flashing light opening and the Image Acquisition of video acquisition device；Described expose is obtained to dodge
The corresponding image into vehicle under lamp open mode, and recognition of face is carried out to it.According to vehicle in the technical solution
Location triggered exposes flashing light and opens, and carries out face knowledge to the corresponding image into vehicle under the exposure flashing light open mode
Not；First by exposing the light-illuminating of flashing light, can improve into the in-car face direction light of the video acquisition device
Thang-kng amount ratio so that face location figure is clear in image, so as to effectively improve recognition of face accuracy.Secondly, originally
Inventive technique scheme is using default exposure flashing light activation threshold value so that vehicle, which reaches the exposure flashing light activation threshold value, can just start exposure
Dodge, and capture exposure and dodge moment picture, so as to ensure that the clarity at face position in the moment picture so that the technology of the present invention side
Face recognition accuracy's higher of case.
Brief description of the drawings
Attached drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the present invention
Example, and for explaining the principle of the present invention together with specification.
Fig. 1 is the structure diagram of the face identification system in a kind of driving vehicle according to an exemplary embodiment；
Fig. 2 is the flow chart of the face identification method in a kind of driving vehicle according to an exemplary embodiment；
Fig. 3 is the structural representation of the face identification device in a kind of driving vehicle according to an exemplary embodiment
Figure；
Fig. 4 is the area schematic that a kind of exposure flashing light according to an exemplary embodiment illuminates in the firing state；
Fig. 5 is the contrast schematic diagram that light filters out before and after a kind of polariscope according to an exemplary embodiment starts.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During attached drawing, unless otherwise indicated, the same numbers in different attached drawings represent the same or similar key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
Fig. 1 is the structure diagram of the face identification system in a kind of driving vehicle according to an exemplary embodiment.
With reference to Fig. 1, which includes：Light filling unit, imaging unit and image identification unit；The light filling unit includes：Expose flashing light；Institute
Stating imaging unit includes：Polariscope and video acquisition device；
The light filling unit 101, the triggering for receiving the transmission of described image recognition unit expose flashing light instruction, are referred to according to this
Order triggering exposes flashing light；
The imaging unit 102, for receiving the instruction of startup polariscope and and the figure of the transmission of described image recognition unit
As acquisition instructions；Polariscope is started according to the startup polariscope instruction；The institute that will be collected according to described image acquisition instructions
State the corresponding image into vehicle under exposure flashing light open mode and be sent to described image recognition unit；
Described image recognition unit 103, it is corresponding described into vehicle under the exposure flashing light open mode for obtaining
Image, and recognition of face is carried out to it.
In practical application, described image recognition unit is monitored by the video acquisition device and obtains region to be detected
Into vehicle image；Described image recognition unit tracks according to the entrance vehicle image and positions described enter in vehicle image
Vehicle location；The vehicle location is the horizontal distance into vehicle distances video acquisition device in vehicle image；When
The vehicle location, which reaches, exposes flashing light activation threshold value, sends the triggering exposure flashing light instruction and image capture instruction and starts inclined
Galvanometer instructs；The corresponding image into vehicle under the exposure flashing light open mode is obtained, and recognition of face is carried out to it；
Wherein, it is described to expose flashing light activation threshold value and the video acquisition device antenna height and the level of significance irradiation distance of exposure flashing light
It is related.
In the present embodiment, the light filling unit further includes：Light compensating lamp；
The light compensating lamp, for providing supplementary light degree for Car license recognition；
Described image recognition unit, is additionally operable to when the vehicle location position reaches the car plate detection threshold value, then to institute
The vehicle stated into vehicle image carries out car plate detection, obtains current vehicle vehicle license plate characteristic string；The car plate detection threshold value model
It is trapped among between 28 meters to 33 meters；Alternatively, the car plate detection threshold range is between 18 meters to 22 meters.
In the present embodiment, the exposure flashing light starts threshold range and enters vehicle distances video acquisition in vehicle image described
Between 26 meters to 31 meters of the horizontal distance of device；The polariscopic thang-kng angle is identical with exposing flashing light inclination angle or and light compensating lamp
Inclination angle scope is between 11 degree of -15 degree.
Fig. 2 is that the face identification system in the driving vehicle shown in Fig. 1 according to an exemplary embodiment is corresponding
The flow chart of face identification method in driving vehicle.Referring to Figures 1 and 2, this method comprises the following steps：
201：Described image recognition unit is monitored by the video acquisition device and obtains the entrance car in region to be detected
Image；
202：Described image recognition unit tracks according to the entrance vehicle image gathered in real time and positions the entrance
Vehicle location in vehicle image；The vehicle location is the water into vehicle distances video acquisition device in vehicle image
Flat distance；
203：Flashing light activation threshold value is exposed when the vehicle location reaches, described image recognition unit sends described expose of triggering and dodges
Lamp instructs and image capture instruction, so as to the exposure flashing light opening and the Image Acquisition of video acquisition device；Described expose is dodged
Lamp activation threshold value is related to the level of significance irradiation distance of the video acquisition device antenna height and exposure flashing light；
204：Described image recognition unit obtains the corresponding image into vehicle under the exposure flashing light open mode,
And recognition of face is carried out to it.Recognition of face is carried out using the image into vehicle exposed under flashing light open mode in the step,
On the one hand the time opened due to exposing flashing light is also that preset in advance is good, exposes the opening time of the flashing light exactly video acquisition
Device collection enters the optimum position of facial image in vehicle, on the other hand exposes the light under flashing light open mode, is conducive to institute
State video acquisition device clearly obtain it is more clear into face part in vehicle image, the especially image.
In practical applications, in monitoring system of the embodiment of the present invention, the light filling unit can also include：Light compensating lamp；
The light compensating lamp, for providing supplementary light degree for Car license recognition；
Described image recognition unit, is additionally operable to when the vehicle location position reaches the car plate detection threshold value, then to institute
The vehicle stated into vehicle image carries out car plate detection, obtains current vehicle vehicle license plate characteristic string；The car plate detection threshold value model
It is trapped among between 28 meters to 33 meters；Alternatively, the car plate detection threshold range is between 18 meters to 22 meters.
Adopted it should be noted that the exposure flashing light starts threshold range described into vehicle distances video in vehicle image
Between 26 meters to 31 meters of the horizontal distance of acquisition means；The polariscopic thang-kng angle, exposure flashing light inclination angle is identical, light compensating lamp inclination angle
Scope is between 11 degree of -15 degree.
Based on embodiment described above, when video acquisition device (camera), flashing light and light compensating lamp are exposed with being all erected at distance
In the monitoring bar that 6.5 meters of face, expose flashing light startup threshold value and be preset as 28 meters, Car license recognition region is arranged between 29 meters to 32 meters i.e.
Car plate detection threshold range is between 29 meters to 32 meters, and when light compensating lamp handles starting state always, we are with reference to the row below
The face identification system in vehicle and method is sailed the workflow of whole system is described in detail.
Face identification system in the driving vehicle includes：Light filling unit, imaging unit and image identification unit；Its
In, the light filling unit includes：Light compensating lamp and exposure flashing light；The light compensating lamp is used for conventional Car license recognition, and the exposure flashing light is used
Light filling is carried out to in-car face direction in responsible.The imaging unit includes：Camera and polariscope；The camera namely before
The video acquisition device mentioned, for gathering the entrance vehicle image in region to be detected in real time；The polariscope is caught for raising
Catch the efficiency from occupant's face light.Described image recognition unit is then responsible for the car to region to be detected in camera fields of view
Real-time detecting and tracking is carried out, car plate and in-car face are positioned and identified.
The specific workflow of face identification system in the driving vehicle is as follows：
S1：Camera monitors monitoring and obtains entering vehicle image and being transferred to described image identification for region to be detected in real time
Unit；
S2：Described image recognition unit according to gather in real time it is described track and position into vehicle image described enter car
Vehicle location in image；The vehicle location is the level into vehicle distances video acquisition device in vehicle image
Distance；
S3：Described image recognition unit carries out Car license recognition and in-car recognition of face according to the vehicle location；
When the vehicle location reaches 32 meters, then described image recognition unit by conventional Recognition Algorithm of License Plate to car
Board is positioned, and the image for being currently entering vehicle is further obtained under the cooperation of light compensating lamp, i.e., in vehicle location at 29 meters
What is obtained between to 32 meters enters vehicle image, and then identifies the number-plate number for being currently entering vehicle.
When the vehicle location reaches 28 meters, described image recognition unit sends triggering and exposes flashing light instruction, starts polarization
Mirror instruct and and image capture instruction, it is described exposure flashing light according to triggering expose flashing light instruction start；The polariscope is according to startup
Polariscope instruction starts, and the camera is according to corresponding under the described image acquisition instructions collection exposure flashing light open mode
Into the image of vehicle, and it is sent to described image recognition unit；Described image recognition unit is according to the exposure flashing light open shape
The corresponding image into vehicle under state, carries out recognition of face；The corresponding entrance under the exposure flashing light open mode
The image of vehicle carries out optical filtering processing by camera polariscope.
It should be noted that the polariscope is arranged in front of camera lens according to thang-kng angle；As long as the polariscope
Start, optical filtering processing can be achieved in the image of camera collection.
It should also be noted that, polariscopic thang-kng angle described above, exposes flashing light inclination angle, light compensating lamp inclination angle scope is 11
Between the degree of degree -15；The height that the scope monitors rod piece according to actual installation is related to flashing light startup threshold value is exposed.Such as：Monitoring bar
Height be 6.5 meters, it is 28 meters from bar that the exposure flashing light, which starts threshold value, then expose flashing light inclination angle be polishing direction and horizontal institute into
Angle is exactly arctan (6.5/28)；It is described it is polariscopic by angle and light compensating lamp inclination angle be all arctan (6.5/28).
It should also be noted that, since the face of personnel only accounts in camera fields of view one piece of very little in vehicle in traveling,
Acted on plus windshield low light transmission from inside to outside, the face light for being actually reached lens imaging is very limited amount of, and mirror
What head largely received is the car external environment light injected from all quarter, when polariscope thang-kng angle adjusts predeterminated position and opens
When, polariscope has filtered out the light of other angles, improves the light from in-car face direction and accounts for whole into camera lens
The ratio of thang-kng amount is significantly improved as shown in figure 5, making the camera lens of camera receive the efficiency of in-car face light, so that into
One step improves the image quality of face.
It should also be noted that, it is usually distance ground that light filling unit described in the present embodiment and imaging unit, which are set up in height,
In the monitoring bar of face about 6-7m, this highly has the norm-setting of national communication road monitoring, it is impossible to which arbitrarily change, belongs to known normal
Know.Can for the image identification unit described in technical solution of the present invention and/or the face identification device in the driving vehicle
To be built in camera internal, can also be provided separately within the industry control cabinet under bar.
If it should also be noted that, light compensating lamp or expose the depth that can illuminate of flashing light (namely illuminated area is in the surface water
Flat distance) be 3 meters, then the region that the exposure flashing light in light filling unit is illuminated in triggering can be designed in distance detection bar 27-30m
Region in, i.e. region shown in GBC in Fig. 4；The illuminated area of Car license recognition light compensating lamp in light filling unit is designed in distance
In the region of monitoring bar 29-32m.
It should also be noted that, the car plate detection threshold range can also be arranged between 18 meters to 22 meters；Can root
Factually the demand on border makes choice.
S4：Described image recognition unit captures figure by conventional vehicle tracking algorithm by front and rear two to be associated, i.e. car
Board identifies that image and recognition of face image are associated；Concretely, it is exactly that will carry out Car license recognition to entering vehicle in step S3,
The license board information feature string of acquisition and the face in face snap figure positioned and occupant that feature extraction obtains
Identity characteristic description string is associated, and will enter vehicle license plate and capture figure, into personnel's face snap figure, the number-plate number in vehicle
Record is completely captured in progress with occupant's identity characteristic string, that is, realizes the real time correlation between occupant and car plate.
S5：By the way that the comparison of the personnel identity feature string in the record and emphasis staff list storehouse, discovery are matched people
During member, you can triggering alarm, has been realized with face information due to car plate and associated, and police can easily pass through conventional traffic very much
Bayonet navigates to the position of emphasis personnel and its vehicle.
Technical solution provided in an embodiment of the present invention, by the entrance vehicle image for monitoring and obtaining region to be detected；With
Track simultaneously positions the vehicle location into vehicle image；The vehicle location enters vehicle distances in vehicle image to be described
The horizontal distance of video acquisition device；Flashing light activation threshold value is exposed when the vehicle location reaches, the triggering exposure flashing light is sent and refers to
Order and image capture instruction, so as to the exposure flashing light opening and the Image Acquisition of video acquisition device；Described expose is obtained to dodge
The corresponding image into vehicle under lamp open mode, and recognition of face is carried out to it.According to vehicle in the technical solution
Location triggered exposes flashing light and opens, and carries out face knowledge to the corresponding image into vehicle under the exposure flashing light open mode
Not；First by exposing the light-illuminating of flashing light, can improve into the in-car face direction light of the video acquisition device
Thang-kng amount ratio so that face location figure is clear in image, so as to effectively improve recognition of face accuracy.Secondly, originally
Inventive technique scheme is using default exposure flashing light activation threshold value so that vehicle, which reaches the exposure flashing light activation threshold value, can just start exposure
Dodge, and capture exposure and dodge moment picture, so as to ensure that the clarity at face position in the moment picture so that the technology of the present invention side
Face recognition accuracy's higher of case.
Again, technical solution of the present invention is also by setting polariscope, to being filtered by the light of video acquisition device
General's choosing；When polariscope starts and adjusts its thang-kng angle, the light of other angles is significantly filtered out, the video acquisition device made
Camera lens receive the efficiency of in-car face light and be significantly improved, so as to further improve the image quality of face.
Fig. 3 is the structure diagram of the face identification device in a kind of driving vehicle according to an exemplary embodiment.
With reference to Fig. 3, the face identification device in the driving vehicle includes：
Image monitoring module 301, for monitoring and obtaining the entrance vehicle image in region to be detected；
Image trace locating module 302, for tracking and positioning the vehicle location into vehicle image；The car
Position is the horizontal distance into vehicle distances video acquisition device in vehicle image；
Information sending module 303, for exposing flashing light activation threshold value when the vehicle location reaches, sends described expose of triggering and dodges
Lamp instructs and image capture instruction, so as to the exposure flashing light opening and the Image Acquisition of video acquisition device；Described expose is dodged
Lamp activation threshold value is related to the level of significance irradiation distance of the video acquisition device antenna height and exposure flashing light；
Face recognition module 304, for obtaining the corresponding image into vehicle under the exposure flashing light open mode,
And recognition of face is carried out to it.
It should be noted that described information sending module, is additionally operable to expose flashing light activation threshold value when the vehicle location reaches,
Send and start polariscope instruction, to improve the logical light amount ratio into the in-car face direction light of the video acquisition device
Example；
The polariscopic thang-kng angle is identical with exposing flashing light inclination angle, and the flashing light inclination angle scope that exposes is in 11 degree of -15 degree
Between；
The thang-kng angle is exactly the polariscope optical direction and horizontal direction angle；The exposure flashing light inclination angle is
The polishing direction for exposing flashing light and horizontal direction angle；The light compensating lamp inclination angle be the light compensating lamp polishing direction with
Horizontal direction angle.
It should also be noted that, the exposure flashing light starts threshold range enters vehicle distances video in vehicle image described
Between 26 meters to 31 meters of the horizontal distance of harvester；The highlights domain mapping illuminated during flashing light triggering that exposes is regarded to away from described
Between the horizontal distance of frequency harvester is 26 to 31 meters.
It should also be noted that, the device further includes：
Threshold setting module, for presetting car plate detection threshold value；The car plate detection threshold range 28 meters to 33 meters it
Between；Alternatively, the car plate detection threshold range is between 18 meters to 22 meters；
Car license recognition module, for reaching the car plate detection threshold value when the vehicle location position, then to the entrance
Vehicle in vehicle image carries out car plate detection, obtains current vehicle vehicle license plate characteristic string.
Technical solution of the present invention also provides a kind of structure diagram of smart camera；The smart camera includes：Row described above
Sail the face identification device in vehicle.
Technical solution of the present invention also provides a kind of structure diagram of industrial personal computer；The industrial personal computer includes：Travel vehicle described above
Face identification device in.
Those skilled in the art will readily occur to the present invention its after considering specification and putting into practice invention disclosed herein
Its embodiment.It is contemplated that cover the present invention any variations, uses, or adaptations, these modifications, purposes or
Person's adaptive change follows the general principle of the present invention and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by appended claim.
Claims (15)
1. the face identification method in a kind of driving vehicle, it is characterised in that this method includes：
Monitor and obtain the entrance vehicle image in region to be detected；
Track and position the vehicle location into vehicle image；The vehicle location enters car in vehicle image to be described
Apart from video acquisition device horizontal distance；
Flashing light activation threshold value is exposed when the vehicle location reaches, sends the triggering exposure flashing light instruction and image capture instruction,
So as to the exposure flashing light opening and the Image Acquisition of video acquisition device；The exposure flashing light activation threshold value and the video acquisition
Device antenna height and the level of significance irradiation distance correlation for exposing flashing light；
The corresponding image into vehicle under the exposure flashing light open mode is obtained, and recognition of face is carried out to it.
2. according to the method described in claim 1, it is characterized in that, the method further includes：
Flashing light activation threshold value is exposed when the vehicle location reaches, sends and starts polariscope instruction, to improve into the video
The thang-kng amount ratio of the in-car face direction light of harvester；
The polariscopic thang-kng angle is identical with exposing flashing light inclination angle, and the exposure flashing light inclination angle scope is between 11 degree of -15 degree；
The thang-kng angle is exactly the polariscope optical direction and horizontal direction angle；The exposure flashing light inclination angle is described
Expose polishing direction and the horizontal direction angle of flashing light.
3. according to the method described in claim 2, it is characterized in that, the exposure flashing light starts threshold range and enters vehicle described
In image between 26 meters to 31 meters of the horizontal distance of vehicle distances video acquisition device.
4. according to the method described in any one in claim 1-3, it is characterised in that this method further includes：
Default car plate detection threshold value；The car plate detection threshold range is between 28 meters to 33 meters；
When the vehicle location position reaches the car plate detection threshold value, then to the vehicle into vehicle image into driving
Board detects, and obtains current vehicle vehicle license plate characteristic string.
5. according to the method described in any one in claim 1-3, it is characterised in that this method further includes：
Default car plate detection threshold value；The car plate detection threshold range is between 18 meters to 22 meters；
When the vehicle location position reaches the car plate detection threshold value, then to the vehicle into vehicle image into driving
Board detects, and obtains current vehicle vehicle license plate characteristic string.
6. the face identification device in a kind of driving vehicle, it is characterised in that the device includes：
Image monitoring module, for monitoring and obtaining the entrance vehicle image in region to be detected；
Image trace locating module, for tracking and positioning the vehicle location into vehicle image；The vehicle location
For the horizontal distance into vehicle distances video acquisition device in vehicle image；
Information sending module, for exposing flashing light activation threshold value when the vehicle location reaches, sends the triggering exposure flashing light instruction
And image capture instruction, so as to the exposure flashing light opening and the Image Acquisition of video acquisition device；The exposure flashing light triggering
Threshold value is related to the level of significance irradiation distance of the video acquisition device antenna height and exposure flashing light；
Face recognition module, for obtaining the corresponding image into vehicle under the exposure flashing light open mode, and to it
Carry out recognition of face.
7. device according to claim 6, it is characterised in that
Described information sending module, is additionally operable to expose flashing light activation threshold value when the vehicle location reaches, and sends startup polariscope and refers to
Order, to improve the thang-kng amount ratio into the in-car face direction light of the video acquisition device；
The polariscopic thang-kng angle is identical with exposing flashing light inclination angle, and the exposure flashing light inclination angle scope is between 11 degree of -15 degree；
The thang-kng angle is exactly the polariscope optical direction and horizontal direction angle；The exposure flashing light inclination angle is described
Expose polishing direction and the horizontal direction angle of flashing light.
8. device according to claim 7, it is characterised in that the exposure flashing light starts threshold range and enters vehicle described
In image between 26 meters to 31 meters of the horizontal distance of vehicle distances video acquisition device.
9. according to the device described in any one in claim 6-8, it is characterised in that the device further includes：
Threshold setting module, for presetting car plate detection threshold value；The car plate detection threshold range is between 28 meters to 33 meters；Or
Person, the car plate detection threshold range is between 18 meters to 22 meters；
Car license recognition module, for reaching the car plate detection threshold value when the vehicle location position, then enters vehicle to described
Vehicle in image carries out car plate detection, obtains current vehicle vehicle license plate characteristic string.
A kind of 10. face identification system in driving vehicle, it is characterised in that including：Light filling unit, imaging unit and image are known
Other unit；The light filling unit includes：Expose flashing light；The imaging unit includes：Polariscope and video acquisition device；
The light filling unit, the triggering for receiving the transmission of described image recognition unit exposes flashing light instruction, according to the instruction triggers
Expose flashing light；
The imaging unit, for receive described image recognition unit transmission startup polariscope instruction and and Image Acquisition refer to
Order；Polariscope is started according to the startup polariscope instruction；The exposure flashing light that will be collected according to described image acquisition instructions
The corresponding image into vehicle is sent to described image recognition unit under open mode；
Described image recognition unit, for obtaining the corresponding image into vehicle under the exposure flashing light open mode, and
Recognition of face is carried out to it.
11. system according to claim 10, it is characterised in that described image recognition unit monitors and obtains area to be detected
Domain enters vehicle image；Track and position the vehicle location into vehicle image；The vehicle location for it is described into
Enter the horizontal distance of vehicle distances video acquisition device in vehicle image；Flashing light activation threshold value is exposed when the vehicle location reaches,
Send the triggering exposure flashing light instruction and image capture instruction and start polariscope instruction；Obtain the exposure flashing light open mode
Under the corresponding image into vehicle, and recognition of face is carried out to it；Wherein, the exposure flashing light activation threshold value is regarded with described
Frequency harvester antenna height and the level of significance irradiation distance correlation for exposing flashing light.
12. system according to claim 11, it is characterised in that the light filling unit further includes：Light compensating lamp；
The light compensating lamp, for providing supplementary light degree for Car license recognition；
Described image recognition unit, is additionally operable to when the vehicle location position reaches the car plate detection threshold value, then to it is described into
The vehicle entered in vehicle image carries out car plate detection, obtains current vehicle vehicle license plate characteristic string；The car plate detection threshold range exists
Between 28 meters to 33 meters；Alternatively, the car plate detection threshold range is between 18 meters to 22 meters.
13. system according to claim 12, it is characterised in that the exposure flashing light starts threshold range and enters car described
In image between 26 meters to 31 meters of the horizontal distance of vehicle distances video acquisition device；The polariscopic thang-kng angle is with exposing
Flashing light inclination angle is identical, and the polariscopic thang-kng angle and exposure flashing light inclination angle and light compensating lamp inclination angle scope are between 11 degree of -15 degree.
A kind of 14. smart camera, it is characterised in that including：People in the driving vehicle as described in any one in claim 6-9
Face identification device.
A kind of 15. industrial personal computer, it is characterised in that including：Face in the driving vehicle as described in any one in claim 6-9
Identification device.
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