CN107170239A - A kind of target vehicle follows the trail of grasp shoot method and device - Google Patents
A kind of target vehicle follows the trail of grasp shoot method and device Download PDFInfo
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- CN107170239A CN107170239A CN201710523182.4A CN201710523182A CN107170239A CN 107170239 A CN107170239 A CN 107170239A CN 201710523182 A CN201710523182 A CN 201710523182A CN 107170239 A CN107170239 A CN 107170239A
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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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Abstract
Grasp shoot method and device are followed the trail of the invention discloses a kind of target vehicle, method includes：After the target vehicle issued tracking candid photograph instruction is received, start to obtain current frame image, and the extraction target vehicle image from the two field picture of acquisition from camera device shooting video with prefixed time interval；Judge whether target vehicle image meets preset requirement in the two field picture, if so, the two field picture is then preserved, if it is not, the optical parametric of camera device is then adjusted, so that target vehicle image can clearly reflect target vehicle information in camera device shoots video.Target vehicle of the present invention follows the trail of grasp shoot method and device, image is captured from video is shot with prefixed time interval, after image is obtained every time, the optical parametric of camera device is adjusted according to the current frame image of acquisition, so that target vehicle image can clearly reflect target vehicle information in camera device shoots video, the image of target vehicle information can clearly be reflected by allowing to get from video is shot.
Description
Technical field
The present invention relates to technical field of intelligent traffic, more particularly to a kind of target vehicle follows the trail of grasp shoot method and device.
Background technology
With comprehensive popularization of automobile, urban traffic blocking, road traffic accident take place frequently etc., and social concern becomes increasingly conspicuous, and
The generation of these problems arises from the traffic violation of driver in most cases.
At present, vehicle supervision department by section set camera candid photograph is monitored to traffic violation, but
It is there is blind area on some small crossings or the less road of vehicle；In addition, the progress based on modern science and technology level, general car
Navigation system on can point out driver has candid photograph in which section, and this all causes many drivers to entertain idea of leaving things to chance,
Therefore make a dash across the red light, drive in the wrong direction, arbitrarily reversing, lane change, pressure double solid line turn around, illegally occupy Emergency Vehicle Lane and turn right and do not allow straight trip by force
There is generation the traffic violations such as pedestrian, the traffic safety hidden danger existed threatens the property even life security of people more.
In order to which the camera head monitor for making up vehicle supervision department's setting is not enough, many cities have all been put into effect corresponding policy and encouraged
Citizen are reported traffic violation, for report citizen, or directly give cash bonuses, or give once slight
Traffic offence exempts from score bonus.Report mode such as can upload multiple illegal photos or video, and report by wechat
System also has corresponding requirement to these illegal photos or video, such as must clearly reflect illegal vehicle number plate, illegal vehicle
Outward appearance and fact of malfeasance etc..
But existing drive recorder can only regularly, solely photographed scene image, do not ensure that the figure of shooting
Picture or video can clearly reflect the information such as illegal vehicle number plate, illegal vehicle outward appearance or fact of malfeasance.
The content of the invention
In consideration of it, following the trail of grasp shoot method and device it is an object of the invention to provide a kind of target vehicle, acquisition can be realized
To can clearly reflect the image of target vehicle information.
To achieve the above object, the present invention provides following technical scheme：
A kind of target vehicle follows the trail of grasp shoot method, including：
After the target vehicle issued tracking candid photograph instruction is received, start to shoot from camera device with prefixed time interval
Current frame image, and the extraction target vehicle image from the two field picture of acquisition are obtained in video；
Judge whether target vehicle image meets preset requirement in the two field picture, if so, the two field picture is then preserved, if
It is no, then the optical parametric of camera device is adjusted, so that target vehicle image can meet institute in the camera device shoots video
Preset requirement is stated, the preset requirement can clearly reflect target vehicle information for target vehicle image in the picture.
Alternatively, in addition to：When reaching prefixed time interval time point, if the optical parametric of the camera device is
In regulation, then after the completion of the optical parametric regulation for treating the camera device, image is obtained from video is shot at once, and obtain with this
Take and calculate the time point for obtaining image next time constantly for starting point.
Alternatively, the preset requirement includes the area ratio position that the target vehicle image that is extracted accounts for whole image
In in preset range；
The optical parametric of the regulation camera device, so that the target vehicle image energy in the camera device shoots video
Meeting the preset requirement includes：
The distance between the camera device zoom group and preceding fixed group are adjusted according to the area ratio, so that described
Camera device shoots median of the area ratio positioned at the preset range that target vehicle image in video accounts for whole image.
Alternatively, the optical parametric of the regulation camera device, so that target vehicle image can be met in capturing the video
The preset requirement also includes：
The distance between the camera device compensation group and zoom group are adjusted, so that the camera device is focused；
The aperture size of the camera device is adjusted, so that the video image exposure shot is normal.
Alternatively, in addition to：If the target vehicle image extracted accounts for the area ratio of whole image positioned at described
Preset range, what the area ratio that the target vehicle image that judgement is extracted accounts for whole image was extracted relative to the last time
Whether the variable quantity that target vehicle image accounts for the area ratio of whole image is more than threshold value；
If so, the distance between the camera device zoom group and preceding fixed group are then adjusted according to the area ratio, with
Make camera device shoot video in target vehicle image account for whole image area ratio be located at the preset range centre
Value.
Alternatively, the first stepper motor is connected with the zoom group, first stepper motor is used for according to input arteries and veins
Reconstitute the distance between the section zoom group and the preceding fixed group；
The second stepper motor is connected with the compensation group, second stepper motor is used to adjust the compensation group and institute
State the distance between zoom group.
Alternatively, include from extracting target from images vehicle image：
The rectangle frame overlapped with image border is set in the picture；
The four edges of rectangle frame are moved in parallel to edge direction simultaneously, in the side first time contact target of the rectangle frame
Where vehicle during pixel, the side stops moving in parallel；
After the four edges of the rectangle frame stop moving in parallel, using the image in the rectangle frame of acquisition as being extracted
Target vehicle image.
Alternatively, in addition to：Mobile device by the image transmitting of preservation to user, mobile device is receiving image
Afterwards, the location information and temporal information of mobile device are read and is recorded with text, and has positioning to believe image and record
Breath and the text files memory of temporal information are in identical file folder.
A kind of target vehicle follows the trail of grasp shoot device, including：
Acquisition module, for after the target vehicle issued tracking candid photograph instruction is received, starting with prefixed time interval
Current frame image, and the extraction target vehicle image from the two field picture of acquisition are obtained from camera device shooting video；
Adjustment module, for judging whether target vehicle image meets preset requirement in the two field picture, if so, then preserving
The two field picture, if it is not, the optical parametric of camera device is then adjusted, so that the target vehicle figure in the camera device shoots video
As that can meet the preset requirement, the preset requirement can clearly reflect that target vehicle is believed for target vehicle image in the picture
Breath.
Alternatively, the acquisition module is additionally operable to when reaching prefixed time interval time point, if the camera device
Optical parametric is adjusted, then after the completion of the optical parametric regulation for treating the camera device, is obtained at once from video is shot
Image, and the time point for obtaining image next time is calculated by starting point of the acquisition moment.
Alternatively, in addition to control panel, the control panel is provided with：
Touch display screen, for showing video image, and issues when user touches the target vehicle and follows the trail of candid photograph and refer to
Order；
Image adjustment button, for regulation to increase or reduced figure of the target vehicle image in shooting manually when being triggered
Area ratio as in.
As shown from the above technical solution, target vehicle provided by the present invention follows the trail of grasp shoot method and device, is receiving
The target vehicle issued, which is followed the trail of, to be captured after instruction, starts to obtain present frame from camera device shooting video with prefixed time interval
Image, and the extraction target vehicle image from the two field picture of acquisition；For the image obtained every time, judge in the two field picture
Whether target vehicle image meets preset requirement, if so, the two field picture is then preserved, if it is not, then adjusting the Optical Parametric of camera device
Number, so that target vehicle image can clearly reflect target vehicle information in camera device shoots video, enabling from shooting
The image of target vehicle information can clearly be reflected by being got in video.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 follows the trail of the flow chart of grasp shoot method for a kind of target vehicle provided in an embodiment of the present invention；
Fig. 2 is the flow chart in the embodiment of the present invention from acquisition extracting target from images vehicle image method；
Fig. 3 is the structural representation of camera device in the embodiment of the present invention；
Fig. 4 is the flow chart that is adjusted according to the target vehicle image of extraction in further embodiment of this invention；
Fig. 5 follows the trail of the schematic diagram of grasp shoot device for a kind of target vehicle provided in an embodiment of the present invention；
Fig. 6 follows the trail of the schematic diagram of control panel in grasp shoot device for a kind of target vehicle provided in an embodiment of the present invention.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described implementation
Example only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, should all belong to protection of the present invention
Scope.
Fig. 1 is refer to, a kind of target vehicle provided in an embodiment of the present invention follows the trail of grasp shoot method, including step：
S10：When receiving the target vehicle issued tracking candid photograph instruction, obtained currently from camera device shooting video
Two field picture.
In the specific implementation, camera device can be the camera device (such as drive recorder) of user's vehicle.User's car
Camera device (such as drive recorder) captured in real-time road conditions image, the road conditions image of shooting is shown to use by display screen
Family, such as can be touch display screen.When user observes illegal vehicle in the road conditions image that touch display screen is shown, use
Family, so as to choose target vehicle, target vehicle can be issued to system trigger by clicking on illegal vehicle in touch display screen
Follow the trail of and capture instruction.
When receiving target vehicle tracking candid photograph instruction, start with prefixed time interval from camera device shoots video
Obtain current frame image, and the extraction target vehicle image from current frame image.
S11：Judge whether target vehicle image meets preset requirement in the two field picture, and the preset requirement is in image
Middle target vehicle image can clearly reflect target vehicle information.
Wherein, target vehicle image can clearly reflect that target vehicle information refers to that target vehicle image can be clear in the picture
Reflect the information such as vehicle appearance, number plate of vehicle or the field vehicle fact of malfeasance of target vehicle, specifically, can be extracted
Target vehicle image account for the area ratio of whole image and be located in preset range, and image shows clearly.
If so, then performing step S12；
S12：Preserve the two field picture.
If it is not, then performing step S13；
S13：The optical parametric of camera device is adjusted, so that the target vehicle image energy in the camera device shoots video
Meet the preset requirement.
S14：When reaching prefixed time interval time point, from camera device shoot video in obtain current frame image, and
Target vehicle image is extracted from the two field picture of acquisition.
In this method, receiving after target vehicle follows the trail of and capture instruction, starting with prefixed time interval from camera device
Shoot in video and capture image, be specially when often reaching prefixed time interval time point, from camera device shoot video in obtain
Current frame image.Often shot after predetermined number two field picture in shooting video specifically, can work as, therefrom gather a two field picture, than
If predetermined number is 48 frames.
S15：Judge whether target vehicle image meets preset requirement in the two field picture, and the preset requirement is in image
Middle target vehicle image can clearly reflect target vehicle information, in the specific implementation, can be extracted target vehicle image
The area ratio for accounting for whole image is located in preset range, and image is shown clearly.
If so, then performing step S16；
S16：Preserve the two field picture.
If it is not, then performing step S17；
S17：The optical parametric of camera device is adjusted, so that the target vehicle image energy in the camera device shoots video
Meet the preset requirement.
Then it is recycled into step S14.
As can be seen that the present embodiment target vehicle follows the trail of grasp shoot method, when user is seen by the road conditions image of captured in real-time
When observing illegal vehicle, target vehicle is chosen, starts to be tracked target vehicle candid photograph；In tracing process, during presetting
Between be spaced and capture image from video is shot, according to the light of the current frame image of acquisition to camera device after image is obtained every time
Parameter regulation is learned, makes clearly reflect target vehicle information in camera device shoots video by adjustment, enabling from bat
Take the photograph in video to get and can clearly reflect the image of target vehicle information, realize that the tracking to target vehicle is captured.
It is exemplary in above example description, following methods can be used from extracting target from images vehicle image, please
With reference to Fig. 2, specific steps include：
S100：The rectangle frame overlapped with image border is set in the picture；
S101：The four edges of rectangle frame are moved in parallel to edge direction simultaneously, connect for the first time on the side of the rectangle frame
Where touching target vehicle during pixel, the side stops moving in parallel；
S102：After the four edges of the rectangle frame stop moving in parallel, using the image in the rectangle frame of acquisition as
The target vehicle image extracted.
In one embodiment, judge whether target vehicle image meets preset requirement in the two field picture, presetting will
The area ratio for asking the target vehicle image including being extracted to account for whole image is located in preset range.
In the specific implementation, the area ratio that extracted target vehicle image accounts for whole image can be calculated by the following method
Value, specially using the above method after the extracting target from images vehicle image of acquisition, binaryzation is carried out to the image of acquisition
Processing, be specially：The pixel gray value of target vehicle image in image is set to 0 (being black), other pixel gray levels
Value is set to 255 (being white), and wherein gray value is 0 pixel number divided by the number of the total pixel of image, the value of gained
The target vehicle image as extracted accounts for the area ratio of whole image, is then judged and is adjusted according to this area ratio
Section.
When the area ratio that the target vehicle image extracted accounts for whole image exceeds preset range, then regulation shooting is filled
The optical parametric put, so that target vehicle image can meet the preset requirement in capturing the video, is specifically included：
S200：The distance between the camera device zoom group and preceding fixed group are adjusted according to the area ratio, so that
Target vehicle image accounts for median of the area ratio positioned at the preset range of whole image in camera device shoots video.
In the present embodiment, Fig. 3 is referred to, camera device includes preceding fixed group 30, zoom group 31, compensation group 32, rear fixed
Group 33 and image device 34.In this method, arrive and fix with specific reference to zoom group 31 in area ratio regulation camera device
Group 30 apart from x so that the area ratio that the target in video image vehicle image shot accounts for whole image is located at preset range
Median.
For example, preset range is 47%~53%, it is less than if calculating obtained area ratio in the current frame image obtained
47%, then the zoom group focal length of control increase camera device, i.e. regulation increases apart from x, makes this area in follow-up shooting image
Ratio is located in the range of 47%~53%；If the area ratio calculated is more than 53%, control reduces the zoom group of camera device
Focal length, that is, reduce apart from x, this area ratio in follow-up shooting image is located in the range of 47%~53%.
Specifically, settable the first stepper motor 35 being connected with the zoom group 31, becomes for adjusting in camera device
31 are organized again to first fixed group 30 apart from x.System is compared according to the area ratio calculated with preset range median, is calculated
The ratio of regulation is needed, so as to calculate x value again, and then the umber of pulse needed for the first stepper motor 35 is calculated and to first
Stepper motor 35 exports pulse, to control the adjustable range x of the first stepper motor 35.
Further, in addition to：
S201：The distance between the camera device compensation group and zoom group are adjusted, so that the camera device is focused.
When by above-mentioned regulating step to camera device before the regulation of the distance between fixed group 30 and zoom group 31 when, can lead
Cause camera device to shoot fuzzy, therefore the distance between camera device zoom group 31 and compensation group 32 be adjusted in this step,
Camera device is set to focus, shooting image picture is clear.
Specifically, compensation group 32 in the camera device is adjusted to zoom group 31 apart from y, so that the camera device pair
It is burnt.The evaluation function can be maximized using gradient descent algorithm, using Laplace operator as evaluation function to adjust compensation
32 are organized to zoom group 31 apart from y, so that camera device focusing is clear.
Specifically, settable the second stepper motor 36 being connected with the compensation group 32, is mended for adjusting in camera device
Group 32 is repaid to zoom group 31 apart from y.System controls the second stepper motor 36, and compensation group position is adjusted.
S202：The aperture size of the camera device is adjusted, so that the video image exposure shot is normal.
After the completion of upper step zoom, according to the video image of camera device captured in real-time, one that current shooting is arrived
Two field picture is converted into gray level image, according to the gray value size of the image slices vegetarian refreshments after conversion, adjusts aperture size.Specifically,
When pixel number of the gray value between 0 to 60 accounts for more than the 35% of total pixel number, show current image exposure not
Foot, then increase camera device aperture, until pixel number of the gray value between 0 to 60 accounts for total pixel number and be less than
35%；When pixel number of the gray value between 201 to 255 accounts for more than the 35% of total pixel number, show current figure
As over-exposed, now reduce aperture, until to account for total pixel number small for pixel number of the gray value between 201 to 255
In 35%.The image exposure for so making camera device subsequently shoot is normal.
So it is adjusted by the optical parametric to camera device, makes energy in the video image that camera device subsequently shoots
Enough clear reflection target vehicle information.
In another preferred embodiment of this method, on the basis of above-mentioned embodiment content, Fig. 4 is refer to, also
Comprise the following steps：
S40：If the area ratio that the target vehicle image extracted accounts for whole image is located in the preset range,
Judge that the target vehicle image extracted accounts for the target vehicle that the area ratio of whole image is extracted relative to the last time
Whether the variable quantity that image accounts for the area ratio of whole image is more than threshold value.
If it is not, then performing step S41.
S41：Preserve the two field picture.
If so, then performing step S42.
S42：The two field picture is preserved, the camera device zoom group is adjusted according to the area ratio and preceding between fixed group
Distance so that camera device shoot video in target vehicle image account for whole image area ratio be located at the default model
The median enclosed.
For example, preset range is 47%~53%, threshold value is 2.5%, the target carriage for obtaining currently being extracted according to calculating
Image accounts for the area ratio a of whole image, and the target vehicle image that the last time is extracted accounts for the area ratio b of whole image,
If the area ratio variable quantity | a-b | more than 2.5%, show target vehicle with respect to this car (i.e. vehicle where camera device) at this
Displacement is larger in one time interval, then adjusts the distance between camera device zoom group and preceding fixed group x, make target vehicle
Image account for whole image area ratio be located at 47%~53% median 50%.
After having adjusted the distance between camera device zoom group and preceding fixed group according to area ratio in this step, and
The distance between the camera device compensation group and zoom group are further adjusted, so that the camera device is focused, and institute is adjusted
The aperture size of camera device is stated, so that the video image exposure shot is normal.Specific adjusting method refer to step S201,
S202, here is omitted.
It is further preferred that in the target vehicle that the various embodiments described above are described follows the trail of grasp shoot method, in addition to：Reach
During prefixed time interval time point, if the optical parametric of the camera device is adjusted, the light of the camera device is treated
Learn after the completion of parameter regulation, obtain image from video is shot at once, and calculating obtains figure next time by starting point of the acquisition moment
The time point of picture.
During being captured to the tracking of target vehicle, if when reaching prefixed time interval time point, camera device
Optical parametric is adjusted, then after the completion of the optical parametric regulation for waiting camera device, then obtains image from video is shot,
The validity for obtaining image every time is so ensure that, the quality for capturing image is improved.
Target vehicle is followed the trail of in capturing the video after the completion of capturing, the image of preservation is uploaded.It is preferred that, the present embodiment
Target vehicle is followed the trail of in grasp shoot method, in addition to：Mobile device by the image transmitting of acquisition to user, mobile device is received
What is obtained can clearly reflect after the vehicle image of target vehicle information, read the location information and temporal information of mobile device simultaneously
Recorded with text, and illegal vehicle image and record are had into the text files memory of location information and temporal information same
In file, such user can easily get clear reflection illegal vehicle number plate, illegal vehicle outward appearance and illegal
The image of the information such as the fact, illegal vehicle image is uploaded or reported.
Accordingly, Fig. 5 is refer to, the embodiment of the present invention also provides a kind of target vehicle and follows the trail of grasp shoot device, including：
Acquisition module 50, for after the target vehicle issued tracking candid photograph instruction is received, starting between preset time
Current frame image, and the extraction target vehicle image from the two field picture of acquisition are obtained in video is shot from camera device；
Adjustment module 51, for judging whether target vehicle image meets preset requirement in the two field picture, if so, then protecting
The two field picture is deposited, if it is not, the optical parametric of camera device is then adjusted, so that the target vehicle in the camera device shoots video
Image can meet the preset requirement, and the preset requirement can clearly reflect that target vehicle is believed for target vehicle image in the picture
Breath.
As can be seen that the target vehicle that the present embodiment is provided follows the trail of grasp shoot device, chased after receiving the target vehicle that issues
Track is captured after instruction, start with prefixed time interval from camera device shoot video in obtain current frame image, and from acquisition
Target vehicle image is extracted in the two field picture；For the image obtained every time, judge that target vehicle image is in the two field picture
It is no to meet preset requirement, if so, the two field picture is then preserved, if it is not, the optical parametric of camera device is then adjusted, so that in shooting dress
Target vehicle information can clearly be reflected by putting target vehicle image in shooting video, so that energy can be got from video is shot by realizing
The image of clear reflection target vehicle information.
The present embodiment target vehicle follows the trail of grasp shoot device, and acquisition module 50 is for receiving the target vehicle issued tracking
Capture after instruction, start to obtain current frame image from camera device shooting video with prefixed time interval.
Such as, by camera device (such as drive recorder) captured in real-time road conditions image of user's vehicle, the road conditions of shooting
Image is shown to user by touch display screen.When user observes illegal vehicle in touch display screen, user can lead to
Cross and illegal vehicle is clicked in touch display screen, so as to choose target vehicle, issuing target vehicle tracking to present apparatus triggering grabs
Clap instruction.The present apparatus obtains present frame figure when receiving target vehicle tracking candid photograph instruction from camera device shooting video
Picture, extracts target vehicle image from the two field picture, and starts to obtain image from video is shot with prefixed time interval.
Therefore, the present embodiment target vehicle follows the trail of grasp shoot device, when user is arrived by the road conditions image viewing of captured in real-time
During illegal vehicle, target vehicle is chosen, starts to be tracked target vehicle candid photograph；In tracing process, between preset time
Every capturing image from video is shot, according to Optical Parametric of the current frame image of acquisition to camera device after image is obtained every time
Number regulation, makes clearly reflect target vehicle information in camera device shoots video, enabling regard from shooting by adjustment
The image of target vehicle information can clearly be reflected by being got in frequency, realize that the tracking to target vehicle is captured.
It is described on the basis of above-described embodiment content in the another embodiment that this target vehicle follows the trail of grasp shoot device
Acquisition module 50 is additionally operable to when reaching prefixed time interval time point, if the optical parametric of the camera device is adjusted
In, then after the completion of the optical parametric regulation for treating the camera device, image is obtained from camera device shooting video at once,
And the time point for obtaining image next time is calculated by starting point of the acquisition moment.It so ensure that and obtain the effective of image every time
Property, improve the quality for capturing image.
In addition, in this part target vehicle described above follows the trail of grasp shoot device, it is involved that mesh is extracted from image
Mark the method for vehicle image and the optical parametric of camera device is adjusted according to shooting image, so that target in capturing the video
Vehicle image can meet the method for preset requirement, refer to the last point of description as described in being followed the trail of in grasp shoot method target vehicle
Content, is repeated no more in the embodiment of our department's separating device.
Further, on the basis of the various embodiments described above content, this target vehicle follows the trail of grasp shoot device and is provided with control
Panel, refer to Fig. 6, and the control panel is provided with：Touch display screen, for showing video image, and when user touches
Issue the target vehicle and follow the trail of candid photograph instruction；Image adjustment button, for regulation increase or the reduction manually when being triggered
Area ratio of the target vehicle image in the image of shooting.
The road conditions image that camera device is photographed shows that user is had found after illegal vehicle by touch display screen, in display
Midpoint picture hits illegal vehicle, chooses target vehicle, and thus triggering issues target vehicle and follows the trail of candid photograph instruction.
In the area ratio size of target vehicle image in adjusting shooting image, user can be by adjusting picture manually
Face."+" image adjustment button and "-" image adjustment button are provided with the control panel, by triggering "+" image adjustment button
To finely tune the area ratio increase shared by target vehicle image, reduction target vehicle figure is finely tuned by "-" image adjustment button
As shared area ratio.
The present embodiment target vehicle follow the trail of grasp shoot device also include communication module, for by the image transmitting of acquisition to user
Mobile device.
The present apparatus can clearly reflect the image transmitting of illegal vehicle information to user's by communication module by what is captured
Mobile device, mobile device is received after vehicle image, reads the location information and temporal information of mobile device and with text
File record, and the text files memory that illegal vehicle image and record have location information and temporal information is pressed from both sides in identical file
In, such user can easily get clear reflection illegal vehicle number plate, illegal vehicle outward appearance and fact of malfeasance etc.
The image of information, illegal vehicle image is uploaded or reported.
In the specific implementation, communication module can be bluetooth communication, by Blue-tooth communication method by the image of acquisition
It is transferred to the mobile device of user.
Grasp shoot method is followed the trail of to a kind of target vehicle provided by the present invention above and device is described in detail.Herein
In apply specific case the principle and embodiment of the present invention be set forth, the explanation of above example is only intended to side
The method and its core concept of the assistant solution present invention.It should be pointed out that for those skilled in the art, not
On the premise of departing from the principle of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification is also fallen into
In the protection domain of the claims in the present invention.
Claims (10)
1. a kind of target vehicle follows the trail of grasp shoot method, it is characterised in that including：
After the target vehicle issued tracking candid photograph instruction is received, start to shoot video from camera device with prefixed time interval
Middle acquisition current frame image, and the extraction target vehicle image from the two field picture of acquisition；
Judge whether target vehicle image meets preset requirement in the two field picture, if so, the two field picture is then preserved, if it is not, then
The optical parametric of camera device is adjusted, so that target vehicle image can meet described default in the camera device shoots video
It is required that, the preset requirement can clearly reflect target vehicle information for target vehicle image in the picture.
2. target vehicle according to claim 1 follows the trail of grasp shoot method, it is characterised in that also include：When reaching default
Between interval time point when, if the optical parametric of the camera device is adjusted, treat the optical parametric of the camera device
After the completion of regulation, obtain image from video is shot at once, and calculate by starting point of the acquisition moment acquisition next time image when
Between point.
3. target vehicle according to claim 1 or 2 follows the trail of grasp shoot method, it is characterised in that the preset requirement includes
The area ratio that the target vehicle image extracted accounts for whole image is located in preset range；
The optical parametric of the regulation camera device, so that target vehicle image can be met in the camera device shoots video
The preset requirement includes：
The distance between the camera device zoom group and preceding fixed group are adjusted according to the area ratio, so that in the shooting
Device shoots median of the area ratio positioned at the preset range that target vehicle image in video accounts for whole image；
The distance between the camera device compensation group and zoom group are adjusted, so that the camera device is focused；
The aperture size of the camera device is adjusted, so that the video image exposure shot is normal.
4. target vehicle according to claim 3 follows the trail of grasp shoot method, it is characterised in that also include：If the institute extracted
State target vehicle image and account for the area ratio of whole image and be located in the preset range, judge the target vehicle that is extracted
Image accounts for the area ratio that the area ratio of whole image accounts for whole image relative to the target vehicle image that the last time is extracted
Variable quantity whether be more than threshold value；
If so, the distance between the camera device zoom group and preceding fixed group are then adjusted according to the area ratio, so that
Camera device shoots median of the area ratio positioned at the preset range that target vehicle image in video accounts for whole image.
5. target vehicle according to claim 3 follows the trail of grasp shoot method, it is characterised in that
The first stepper motor is connected with the zoom group, first stepper motor is used to become according to input pulse regulation is described
The distance between times group and described preceding fixed group；
The second stepper motor is connected with the compensation group, second stepper motor is used to adjust the compensation group and the change
The distance between organize again.
6. target vehicle according to claim 1 follows the trail of grasp shoot method, it is characterised in that from extracting target from images vehicle
Image includes：
The rectangle frame overlapped with image border is set in the picture；
The four edges of rectangle frame are moved in parallel to edge direction simultaneously, in the side first time contact target vehicle of the rectangle frame
During the pixel of place, the side stops moving in parallel；
After the four edges of the rectangle frame stop moving in parallel, the mesh extracted is used as using the image in the rectangle frame of acquisition
Mark vehicle image.
7. target vehicle according to claim 1 follows the trail of grasp shoot method, it is characterised in that also include：By the image of preservation
The mobile device of user is transferred to, mobile device upon receiving the image, reads the location information and time letter of mobile device
Cease and recorded with text, and image and record are had into the text files memory of location information and temporal information in identical file
In folder.
8. a kind of target vehicle follows the trail of grasp shoot device, it is characterised in that including：
Acquisition module, for receiving after the target vehicle that issues follows the trail of and capture instruction, starts with prefixed time interval from taking the photograph
Current frame image is obtained in video as device is shot, and the extraction target vehicle image from the two field picture of acquisition；
Adjustment module, for judging whether target vehicle image meets preset requirement in the two field picture, if so, then preserving the frame
Image, if it is not, the optical parametric of camera device is then adjusted, so that the target vehicle image energy in the camera device shoots video
The preset requirement is met, the preset requirement can clearly reflect target vehicle information for target vehicle image in the picture.
9. target vehicle according to claim 8 follows the trail of grasp shoot device, it is characterised in that the acquisition module is additionally operable to
When reaching prefixed time interval time point, if the optical parametric of the camera device is adjusted, the camera device is treated
Optical parametric regulation after the completion of, obtain image from video is shot at once, and calculating is obtained next time by starting point of the acquisition moment
Take the time point of image.
10. target vehicle according to claim 8 or claim 9 follows the trail of grasp shoot device, it is characterised in that also including control panel,
The control panel is provided with：
Touch display screen, for showing video image, and issues when user touches the target vehicle and follows the trail of and capture instruction；
Image adjustment button, for regulation to increase or reduced target vehicle image in the image of shooting manually when being triggered
Area ratio.
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| CN201710523182.4A CN107170239A (en) | 2017-06-30 | 2017-06-30 | A kind of target vehicle follows the trail of grasp shoot method and device |
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