CN108389438A - A kind of writing on the blackboard acquisition system - Google Patents
A kind of writing on the blackboard acquisition system Download PDFInfo
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- CN108389438A CN108389438A CN201810442043.3A CN201810442043A CN108389438A CN 108389438 A CN108389438 A CN 108389438A CN 201810442043 A CN201810442043 A CN 201810442043A CN 108389438 A CN108389438 A CN 108389438A
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- 238000000034 method Methods 0.000 claims abstract description 74
- 230000008569 process Effects 0.000 claims abstract description 70
- 238000004891 communication Methods 0.000 claims abstract description 17
- 241001465382 Physalis alkekengi Species 0.000 claims description 43
- 238000001514 detection method Methods 0.000 claims description 22
- 230000000007 visual effect Effects 0.000 claims description 12
- 238000012937 correction Methods 0.000 claims description 10
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 3
- 238000006748 scratching Methods 0.000 claims description 3
- 230000002393 scratching effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
- B43L1/04—Blackboards
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- Business, Economics & Management (AREA)
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Abstract
This application discloses a kind of writing on the blackboard acquisition systems, including multimedia collection module and multimedia process module, the multimedia collection module is set to the position that can take blackboard region, multimedia collection module is connected with multimedia process module communication, multimedia collection module is used to carry out multimedia collection to blackboard region, and the multimedia board letter of acquisition breath is sent to multimedia process module, multimedia process module is used to handle multimedia board letter breath, the multimedia board letter breath that obtains that treated, treated, and multimedia board letter breath can at any time be checked for student, to reduce the burden that student takes notes on classroom, improve efficiency of listening to lecture and learning efficiency.
Description
Technical field
This application involves teaching equipment technical fields, more specifically to a kind of writing on the blackboard acquisition system.
Background technology
Education be exactly it is a kind of it is purposeful, in a organized way, society that is planned, systematically teaching knowledge and technology specification etc. it is living
It is dynamic.Education plays suitable important function in society, on the one hand, education is the preparation that everyone lives, it to individual by passing
Culture is passed, helps people to surmount an opinion and goes the intellectual property grasped the experience of forefathers, share mankind's accumulation from generation to generation, obtain independent
The prerequisite of life.On the other hand, it arouses person's force again, cannot improve and reform oneself, to open up human development
Road, establish the basis for moving towards following.
For the individual of school-days, most directly education be exactly school eduaction, i.e., from teacher in classroom to
Scientific and cultural knowledge is taught in life.Currently, common Classroom Teaching is to use chalk-writing writing on the blackboard, student on blackboard by teacher
It takes notes when paying attention to the class.Obviously, this mode has undoubtedly aggravated the classroom burden of student, reduces efficiency of listening to lecture, directly results in
The learning efficiency of student declines.
Invention content
In view of this, this application provides a kind of writing on the blackboard acquisition system, for acquiring teaching board in real time, looked into for student
It sees, to reduce the burden that student takes notes on classroom, improves efficiency of listening to lecture and learning efficiency.
To achieve the goals above, it is proposed that scheme it is as follows：
A kind of writing on the blackboard acquisition system, including：Multimedia collection module and multimedia process module, the multimedia collection mould
Block is set to the position that can take blackboard region, and the multimedia process module connects with the multimedia collection module communication
It connects；
The multimedia collection module, for carrying out multimedia collection to blackboard region, and by the multimedia writing on the blackboard of acquisition
Information is sent to the multimedia process module；
The multimedia process module, for handling multimedia board letter breath, more matchmakers that obtain that treated
Body writing on the blackboard information.
Preferably, further include：
Lamps and lanterns；
The multimedia collection module is embedded in the inside cavity of the lamps and lanterns, the housing surface of the lamps and lanterns with it is described more
The camera corresponding position of media collection module is provided with trepanning.
Preferably, the multimedia process module is independently of the lamps and lanterns, the multimedia process module by wired or
Wireless is connect with the multimedia collection module communication；
Or,
The multimedia process module is embedded in the inside cavity of the lamps and lanterns, or is set on the pedestal of the lamps and lanterns.
Preferably, the multimedia collection module includes：Camera and shell, the camera are embedded in the shell
Portion, and the camera lens of camera is placed in the housing outer surface；
One end of the shell has the first power interface, and first power interface is adapted to power port, the shell
The other end of body has second source interface, and the second source interface is adapted to the attaching plug of lamps and lanterns, first power supply
It is electrically connected between interface and the second source interface.
Preferably, the multimedia process module is independently of the multimedia collection module, the multimedia process module
It is connect with the multimedia collection module communication by wired or wireless form；
Or,
The multimedia process module is embedded in the enclosure interior, and the multimedia process module is logical with the camera
News connection.
Preferably, the camera lens adjustable angle of the camera.
Preferably, further include：
Server-side, the server-side are connected with multimedia process module communication；
The server-side, for receiving the multimedia process module multimedia board letter breath that sends that treated, and
Storage.
Preferably, the server-side is additionally operable to：
Treated the multimedia board letter breath is pushed into live streaming client in the form of live multimedia stream；
And/or
Receiving terminal apparatus sets the read requests of treated described in storage multimedia board letter breath to the terminal
Preparation send treated the multimedia board letter breath.
Preferably, the multimedia board letter breath includes multiframe writing on the blackboard image, and the multimedia process module includes：
Frame detection module, the frame for detecting the blackboard region in writing on the blackboard image described in every frame；
Frame correction module carries out shape correction for the frame to blackboard region described in writing on the blackboard image described in every frame；
Module is scratched, the region for being surrounded to the frame after being corrected in writing on the blackboard image described in every frame carries out scratching figure, obtains
Stingy figure image per frame.
Preferably, the multimedia collection module is two or more, and the multimedia process module further includes：
Image mosaic module, for the same time point that each multimedia collection module acquires correspond to the stingy figure image of frame into
Row splicing, obtains stitching image.
Preferably, further include：
Dynamic detection module, the dynamic detection module are connect with the multimedia collection module communication；
The dynamic detection module is being determined for carrying out dynamic detection to the blackboard region in the blackboard region
There are control the multimedia collection module when live animal to start.
Preferably, further include：
Parameter determination module, for according to top surface on blackboard region height, blackboard region distance and bottom surface distance, more matchmakers
Vertical line distance of the camera of body acquisition module apart from upper top surface distance and camera apart from plane where blackboard region, determines institute
Effective acquisition visual angle and the pitch angle for stating camera, to ensure that the camera can collect entire blackboard region.
Preferably, further include：
Pose adjustment module, the pitch angle for controlling the camera for adjusting the multimedia collection module, until described
Until multimedia collection module the image collected includes the frame in complete blackboard region.
It can be seen from the above technical scheme that writing on the blackboard acquisition system provided by the embodiments of the present application, including multimedia are adopted
Collection module and multimedia process module, the multimedia collection module are set to the position that can take blackboard region, multimedia
Acquisition module is connected with multimedia process module communication, and multimedia collection module is used to carry out multimedia collection to blackboard region,
And the multimedia board letter of acquisition breath is sent to multimedia process module, multimedia process module is used for multimedia board letter
Breath is handled, the multimedia board letter breath that obtains that treated, and treated, and multimedia board letter breath can at any time be looked into for student
It sees, to reduce the burden that student takes notes on classroom, improves efficiency of listening to lecture and learning efficiency.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of application for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of writing on the blackboard acquisition system electrical structure schematic diagram disclosed in the embodiment of the present application；
Fig. 2 is another writing on the blackboard acquisition system electrical structure schematic diagram disclosed in the embodiment of the present application；
Fig. 3 illustrates a kind of combining structure schematic diagram of multimedia collection module and lamps and lanterns；
Fig. 4 illustrates a kind of configuration schematic diagram of multimedia collection module and lamps and lanterns；
Fig. 5 illustrates a kind of multimedia collection module and the first visual angle figure after lamp combination；
Fig. 6 illustrates a kind of multimedia collection module and the second visual angle figure after lamp combination；
Fig. 7 illustrates a kind of side view of multimedia collection module；
Fig. 8 is another writing on the blackboard acquisition system electrical structure schematic diagram disclosed in the embodiment of the present application；
Fig. 9 is another writing on the blackboard acquisition system electrical structure schematic diagram disclosed in the embodiment of the present application；
A kind of classroom schematic diagram of a scenario of Figure 10 examples；
Figure 11 is another writing on the blackboard acquisition system electrical structure schematic diagram disclosed in the embodiment of the present application.
Specific implementation mode
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
In traditional teaching method, chalk-writing writing on the blackboard is used on blackboard by teacher, and be based on traditional instruction.Student needs
While change record writing on the blackboard is paid attention to the class, the uses such as to review after class.This mode undoubtedly aggravated student classroom burden, sometimes because
The content of courses that teacher says is missed to be busy with recording the note, reduces efficiency of listening to lecture.
In order to solve this problem, inventor utilizes touch first it is envisioned that by existing touch screen technology
Shield to substitute traditional baking vanish blackboard, i.e., writing on the blackboard is write by teacher on the touchscreen, to which electronic equipment is remembered where touch screen
Record the content on touch screen, can subsequently be shown to student and other users, to reduce student take notes on classroom it is negative
Load.
But by making further research discovery to this mode, there are many defects：
1, of high cost.Compared to traditional baking vanish blackboard, the cost of touch screen will greatly improve, and can not accomplish comprehensively general
And.
2, power consumption is high.Compared to traditional baking vanish blackboard, touch screen needs external power supply to supply, and large-sized touch screen
Lasting lighting needs very high power consumption.
3, harmful to student eyesight.Student stares at touch screen the long period and is easy to damage student eyesight, especially to body
The teenager developed, eyesight influence are extremely serious.
4, installation and deployment are difficult.Traditional baking vanish blackboard is substituted using touch screen, needs to be transformed on a large scale, including old
The dismounting of formula blackboard and circuit modification etc..
Based on the above-mentioned several strip defects enumerated, there is also some to overcome in the way of being solved the problems, such as by touch screen
The problem of, inventor continues to study thus.In the process, inventor has jumped out existing thinking logic, is different from pair
The transformation of blackboard, inventor provides another solution route, i.e., in the feelings for still retaining traditional baking vanish blackboard record writing on the blackboard
Under condition, multimedia collection and processing equipment are added, it, can be for student, Lao Shicha after being handled to record writing on the blackboard content in real time
It sees, takes notes on classroom without student, can attentively pay attention to the class, substantially increase learning efficiency.
Next, writing on the blackboard acquisition system disclosed in the embodiment of the present application is introduced in conjunction with attached drawing 1, as shown in Figure 1, plate
Book acquisition system includes：
Multimedia collection module 11 and multimedia process module 12, the multimedia collection module 11 are set to and can shoot
To the position in blackboard region, the multimedia process module 12 is connected with the multimedia collection module 11 communication.Wherein,
The multimedia collection module 11, for carrying out multimedia collection to blackboard region, and by the multimedia board of acquisition
Letter breath is sent to the multimedia process module 12.
The multimedia process module 12, for handling multimedia board letter breath, it is more to obtain that treated
Media plate letter ceases.
Wherein, multimedia collection module 11 includes camera lens, and the multimedia messages in blackboard region are acquired by camera lens, are such as schemed
Picture, video.
It can be communicated and be connected by wired form between multimedia collection module 11 and multimedia process module 12, also may be used
It is connected by by communicating in the form of wireless, such as bluetooth connection, wifi connections.
Multimedia process module 12 can be image processing engine or video processing engine, be adopted to multimedia collection module 11
The multimedia board letter breath of collection is handled, and common such as format conversion, scratches figure, image mosaic at image rectification.Pass through more matchmakers
After body processing module 12 handles multimedia board letter breath, the multimedia board letter breath consulted for user is obtained.
In the case of one kind is optional, multimedia process module 12 may include：Frame detection module, frame correction module,
Scratch module, any one or more combination in the block of image mosaic mould.Specifically：
Frame detection module, the frame for detecting the blackboard region in writing on the blackboard image described in every frame.
Wherein, existing frame detection technique may be used in frame detection module, realizes to blackboard region in writing on the blackboard image
Detection.
Frame correction module carries out shape correction for the frame to blackboard region described in writing on the blackboard image described in every frame.
Specifically, due to the camera of multimedia collection module may not face blackboard region, the writing on the blackboard of shooting
The frame in blackboard region and irregular rectangle in image, therefore can be by frame correction module to blackboard area in writing on the blackboard image
The frame in domain carries out shape correction.
Module is scratched, the region for being surrounded to the frame after being corrected in writing on the blackboard image described in every frame carries out scratching figure, obtains
Stingy figure image per frame.
It is understood that the region for only having frame to surround in writing on the blackboard image is only real writing on the blackboard content, therefore can be with
In every frame writing on the blackboard image, the region that the frame after correction surrounds is carried out to scratch figure, obtains the stingy figure image of every frame.
It is understood that the quantity of multimedia collection module 11 may be more than two, each multimedia collection module
The part in 11 acquisition blackboard regions, the region that multiple multimedia collection modules 11 acquire collectively constitutes complete blackboard region.
Based on this, each multimedia collection module acquires multimedia board letter breath all the way, per multimedia board letter all the way
The time of breath is consistent, and includes multiframe writing on the blackboard image.The application can splice multiway images, complete to obtain
Writing on the blackboard content.The splicing can be realized by image mosaic module, specific as follows：
Image mosaic module, for the same time point that each multimedia collection module acquires correspond to the stingy figure image of frame into
Row splicing, obtains stitching image.
Multimedia collection module 11 can be arranged in the position that can take blackboard region, such as be hung on classroom roof
On, alignment lens blackboard region, or be arranged in other positions that can take blackboard region,.
Writing on the blackboard acquisition system provided by the embodiments of the present application, including multimedia collection module and multimedia process module, should
Multimedia collection module is set to the position that can take blackboard region, and multimedia collection module is logical with multimedia process module
News connection, multimedia collection module is used to carry out multimedia collection to blackboard region, and the multimedia board letter of acquisition is ceased and is sent out
It send to multimedia process module, multimedia process module is used to handle multimedia board letter breath, and it is more to obtain that treated
Media plate letter ceases, and treated, and multimedia board letter breath can at any time be checked for student, be done on classroom to reduce student
The burden of notes improves efficiency of listening to lecture and learning efficiency.
Optionally, in conjunction with shown in Fig. 2, writing on the blackboard acquisition system disclosed in the embodiment of the present application can also include：Dynamic detection
Module 13.
Dynamic detection module 13 is connected with the multimedia collection module 11 communication.Dynamic detection module 13, for institute
It states blackboard region and carries out dynamic detection, determining that there are control the multimedia collection module when live animal in the blackboard region
11 start.
Further, dynamic detection module 13 determine blackboard region maintain setting time length be not present live animal when,
The closing of multimedia collection module 11 can be controlled.
It is understood that when writing writing on the blackboard there are active user only in blackboard region, multimedia collection module 11 opens
It starts building to be acquired just meaningful.And when live animal is not present in certain time length in blackboard region, it indicates useless
Writing on the blackboard is write at family, can be controlled the closing of multimedia collection module 11, be stopped acquisition.
Certainly, class period and schedule can also be stored in dynamic detection module 13 by the embodiment of the present application in advance,
The startup and closing of multimedia collection module 11 are controlled according to class period and schedule by dynamic detection module 13.It can manage
Solution is only likely to control multimedia collection module 11 and starts with schedule surface school session during class hours.
In another embodiment of the application, in conjunction with attached drawing 3-7, further Jie is done to the writing on the blackboard acquisition system of the application
It continues.
Writing on the blackboard acquisition system disclosed in the embodiment of the present application can also include：Lamps and lanterns 14.
Specifically under scene of imparting knowledge to students, lamps and lanterns 14 can be blackboard lights, for being illuminated to blackboard region.
As shown in figure 3, being based on the lamps and lanterns 14, multimedia collection module 11 can be embedded in the inside cavity of lamps and lanterns 14, lamp
The housing surface of tool 14 is provided with trepanning 141 with 111 corresponding position of camera of multimedia collection module 11.
It is understood that the number of multimedia collection module 11 does not limit, merely illustrates in Fig. 3 and set in lamps and lanterns 14
In addition to this more numbers can also be arranged in the case where setting a multimedia collection module 11.
It should be noted that lamps and lanterns 14 generally have the joint component of the main body and main body both ends of placing luminescence chip, connect
Head part is used for external power supply.Based on this, multimedia collection module 11 can be embedded in the main part of lamps and lanterns 14 in the present embodiment
In the cavity divided, it can also be embedded in the cavity of the joint component of lamps and lanterns 14, specific set-up mode does not limit.Multimedia collection
Module 11 can utilize the joint component of lamps and lanterns to access power supply, without additional transformation circuit.
Pass through 111 corresponding position of the camera setting trepanning of housing surface and multimedia collection module 11 in lamps and lanterns 14
141, it is ensured that the camera 111 of multimedia collection module 11 can externally acquire multimedia messages.
Optionally, the camera 111 of multimedia collection module 11 can adjust the angle.
It further, can be independently of the lamps and lanterns 14, multimedia process module 12 for multimedia process module 12
It is communicated and is connected by wired or wireless form between multimedia collection module 11.Show for example, multimedia process module 12 is arranged
In server-side, multimedia collection module 11 has wired connection or wireless connection with server-side.
In the case of another kind is optional, multimedia process module 12 can be embedded in the inside cavity of lamps and lanterns 14, or setting
In on the pedestal of lamps and lanterns 14.It is externally invisible when multimedia process module 12 is embedded in the inside cavity of lamps and lanterns 14, in figure not
It shows.
Further, Fig. 4-7 illustrates another optional structure.
Under the exemplary structures of Fig. 4-7, multimedia collection module 11 includes camera 111 and shell 112, camera 111
It is embedded in inside shell 112, and the camera lens of camera 111 is placed in 112 outer surface of shell, to guarantee externally to carry out multimedia
Acquisition.
Optionally, the angle lens of camera 111 can adjust.
One end of shell 112 has the first power interface 1121, and the first power interface 1121 is adapted to power port, and first
Power interface 1121 can access power port and be powered.
The other end of shell 112 has second source interface (not shown), the electricity of second source interface and lamps and lanterns 14
Source plug 141 is adapted to.The attaching plug 141 of lamps and lanterns 14 is connect with the luminescence chip of lamp interior, for providing power supply for chip.
It is electrically connected between first power interface 1121 and second source interface.Based on this, when the first power interface 1121 and power port
When connection, is powered for luminescence chip by the attaching plug 141 of second source interface and lamps and lanterns 14, ensure that lamps and lanterns can normally be sent out
Light.
First power interface 1121 can also be electrically connected with internal camera, to be powered simultaneously to camera.
It is understood that the number of multimedia collection module 11 can be one or two, exemplary in Fig. 4 is two
The case where multimedia collection module 11, i.e. two multimedia collection modules 11, coordinate with two ports of lamps and lanterns respectively.Certainly, originally
Application can also only be arranged a multimedia collection module 11, only with a port of lamps and lanterns 14 coordinate, lamps and lanterns 14 it is another
It a port can direct external power supply.
Further, multimedia process module 12 can be independently of multimedia collection module 11, multimedia process module 12
It is communicated and is connected by wired or wireless form between multimedia collection module 11.Show for example, multimedia process module 12 is arranged
In server-side, multimedia collection module 11 has wired connection or wireless connection with server-side.
As shown in Figures 6 and 7, when multimedia process module 12 is arranged in server-side, multimedia collection module 11 can lead to
Wired forms are crossed to connect with server-side.Opening is provided in Fig. 6 and Fig. 7 on shell 112, what multimedia collection module 11 connected
Band-like communication line 15 is stretched out from opening, is connect with server-side.
In the case of another kind is optional, multimedia process module 12 can be embedded in the inside of shell 112, not show in figure
Go out.That is, multimedia process module 12 and camera 111 are embedded in inside shell 112, connection can be communicated therebetween.
Shown in Fig. 7, the side of the shell 112 of multimedia collection module 11 is also provided with radiating part
Part 1122, for radiating.
Under the exemplary structures of Fig. 4-7, multimedia collection module 11 and multimedia process module that writing on the blackboard acquisition system includes
12 can utilize based on the setting of existing lamps and lanterns, and the supply line of existing lamps and lanterns is made full use of to be powered, without additionally changing
Make circuit.
In another embodiment of the application, in conjunction with shown in Fig. 8, writing on the blackboard acquisition system may further include：Service
End 16.
Server-side 16 is connected with the communication of the multimedia process module 12.
Server-side 16 sends treated multimedia board letter breath for receiving the multimedia process module 12, and
Storage.
According to above-mentioned introduction it is found that multimedia process module 12 can be set in server-side 16, multimedia process module
12 can also be arranged in lamps and lanterns, and then are communicated and connected by wired or wireless form with server-side 16.
Server-side 16 receives multimedia process module 12 and sends treated multimedia board letter breath, is stored.It should
The multimedia board letter breath of storage can be for consulting, calling.
Server-side 16 can be the terminal devices such as PC terminals, server, cloud platform.
Optionally, server-side 16 can be pushed away treated the multimedia board letter breath in the form of live multimedia stream
It send to live streaming client.
That is, as multimedia collection module 11 acquires in real time, server-side 16 in real time will treated multimedia board letter
Breath pushes to live streaming client in the form of live multimedia stream, and writing on the blackboard content is played in real time so that client is broadcast live.
Further alternative, server-side 16 can be with receiving terminal apparatus to treated described in storage multimedia writing on the blackboard
The read requests of information, to treated described in terminal device transmission, multimedia board letter ceases.
That is, being ceased for the multimedia board letter that server-side 16 stores, it can subsequently be read, be called by terminal device, by
Server-side 16 sends multimedia board letter breath to terminal device.
In another embodiment of the application, the posture for introducing the camera 111 of multimedia collection module 11 was arranged
Journey.
This application provides the modes of the posture of two kinds of cameras 111 setting, respectively as shown in figures 9 and 11.
The first set-up mode is introduced in conjunction with Fig. 9 first：
The exemplary writing on the blackboard acquisition systems of Fig. 9 further comprise：Parameter determination module 17.
Parameter determination module 17, for according to top surface on blackboard region height, blackboard region distance and bottom surface distance, it is more
Vertical line distance of the camera of media collection module apart from upper top surface distance and camera apart from plane where blackboard region, determines
Effective acquisition visual angle of the camera and pitch angle, to ensure that the camera can collect entire blackboard region.
It is understood that in the case where ensureing that existing blackboard and lamps and lanterns installation position are not transformed, blackboard region height,
Top surface and bottom surface distance are fixed on blackboard region distance.It is arranged in lamps and lanterns further as multimedia collection module
It is interior, it is fixed in lamps and lanterns installation position, the camera of multimedia collection module apart from upper top surface distance and camera away from
Also it is fixed with a distance from vertical line from plane where blackboard region.
Parameter determination module 17 determines effective acquisition of the camera by geometrical relationship according to above-mentioned fixed parameter
Visual angle and pitch angle, to ensure that the camera can collect entire blackboard region.
Next illustrate in conjunction with attached drawing 10：
Attached map parameter is introduced first：
Camera apart from upper top surface distance be Vt, camera apart from blackboard region place platform vertical line distance be S, blackboard
Top edge apart from upper top surface distance is Bt, blackboard region height is Rl, blackboard lower edge apart from bottom surface distance is Rb, upper top surface
Visual angle ∠ ρ is effectively acquired with bottom surface distance H, camera, camera pitch angle ∠ β (are specially that camera effectively acquires visual angle
The angle of coboundary and horizontal plane), the folder of the line of blackboard coboundary to camera and blackboard lower boundary to the line of camera
Angle is defined as writing on the blackboard and effectively acquires the intersection point of plane where visual angle ∠ α, camera effectively acquire visual angle lower boundary and blackboard under
The distance Vb of bottom surface.
Wherein, ∠ ρ and ∠ β are parameters to be determined.
In order to ensure that camera can collect entire blackboard region, it may be determined that following three condition：
1)∠ρ≥∠α
Wherein, ∠ α=Arctg ((Rl+Bt-Vt)/S)-Arctg ((Bt-Vt)/S)
Therefore, ∠ ρ >=Arctg ((Rl+Bt-Vt)/S)-Arctg ((Bt-Vt)/S)
2) camera effectively acquires visual angle coboundary and cannot be below blackboard coboundary
Meet S*tan ∠ β+Vt≤Bt
I.e.：∠β≤argtan((Bt-Vt)/S)
3) camera effectively acquires visual angle lower boundary not above blackboard lower boundary：
Vb≤Rb
Vb=H-Vt-S*tan (∠ β+∠ ρ)≤Rb
∠β≥argtan((H-Vt-Rb)/S)-(Arctg((Rl+Bt-Vt)/S)-Arctg((Bt-Vt)/S))
∠β≥argtan((H-Vt-Rb)/S)-(Arctg((Rl+Bt-Vt)/S)+Arctg((Bt-Vt)/S)
To sum up three conditions are it is found that need to meet：
∠ρ≥Arctg((Rl+Bt-Vt)/S)-Arctg((Bt-Vt)/S)
argtan((H-Vt-Rb)/S)-(Arctg((Rl+Bt-Vt)/S)+Arctg((Bt-Vt)/S)≤∠β≤
argtan((Bt-Vt)/S)。
Further, it is introduced in conjunction with 11 pairs of second of set-up modes：
The exemplary writing on the blackboard acquisition systems of Figure 11 further comprise：Pose adjustment module 18.
Pose adjustment module 18, the pitch angle for controlling the camera for adjusting the multimedia collection module 11, until
Until described 11 the image collected of multimedia collection module includes the frame in complete blackboard region.
Specifically, pose adjustment module 18 can get the image that multimedia collection module 11 takes, and then detect
Whether image includes the frame in complete blackboard region.If it is not, then illustrating that multimedia collection module does not take completely
Blackboard region, it is therefore desirable to adjust the pitch angle of camera.Specifically, when lacking blackboard region upper side frame in the image taken
When, then the pitch angle of camera can be turned down；When lacking blackboard region lower frame in the image taken, then can will take the photograph
As the pitch angle of head tunes up.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only that
A little elements, but also include other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the application.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can in other embodiments be realized in the case where not departing from spirit herein or range.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (14)
1. a kind of writing on the blackboard acquisition system, which is characterized in that including：Multimedia collection module and multimedia process module are described more
Media collection module is set to the position that can take blackboard region, the multimedia process module and the multimedia collection
Module communication connects；
The multimedia collection module for carrying out multimedia collection to blackboard region, and the multimedia board letter of acquisition is ceased
It is sent to the multimedia process module；
The multimedia process module, for handling multimedia board letter breath, the multimedia board that obtains that treated
Letter ceases.
2. writing on the blackboard acquisition system according to claim 1, which is characterized in that further include：
Lamps and lanterns；
The multimedia collection module is embedded in the inside cavity of the lamps and lanterns, the housing surface of the lamps and lanterns and the multimedia
The camera corresponding position of acquisition module is provided with trepanning.
3. writing on the blackboard acquisition system according to claim 2, which is characterized in that the multimedia process module is independently of described
Lamps and lanterns, the multimedia process module are connect by wired or wireless form with the multimedia collection module communication；
Or,
The multimedia process module is embedded in the inside cavity of the lamps and lanterns, or is set on the pedestal of the lamps and lanterns.
4. writing on the blackboard acquisition system according to claim 1, which is characterized in that the multimedia collection module includes：Camera shooting
Head and shell, the camera is embedded in the enclosure interior, and the camera lens of camera is placed in the housing outer surface；
One end of the shell has the first power interface, and first power interface is adapted to power port, the shell
The other end has second source interface, and the second source interface is adapted to the attaching plug of lamps and lanterns, first power interface
It is electrically connected between the second source interface.
5. writing on the blackboard acquisition system according to claim 4, which is characterized in that the multimedia process module is independently of described
Multimedia collection module, the multimedia process module are connected by wired or wireless form and the multimedia collection module communication
It connects；
Or,
The multimedia process module is embedded in the enclosure interior, and the multimedia process module connects with camera communication
It connects.
6. writing on the blackboard acquisition system according to claim 2, which is characterized in that the camera lens adjustable angle of the camera.
7. writing on the blackboard acquisition system according to claim 4, which is characterized in that the camera lens adjustable angle of the camera.
8. according to claim 1-7 any one of them writing on the blackboard acquisition systems, which is characterized in that further include：
Server-side, the server-side are connected with multimedia process module communication；
The server-side for receiving the multimedia process module multimedia board letter breath that sends that treated, and stores.
9. writing on the blackboard acquisition system according to claim 8, which is characterized in that the server-side is additionally operable to：
Treated the multimedia board letter breath is pushed into live streaming client in the form of live multimedia stream；
And/or
Receiving terminal apparatus sends out the read requests of treated described in storage multimedia board letter breath to the terminal device
Treated described in sending, and multimedia board letter ceases.
10. according to claim 1-7 any one of them writing on the blackboard acquisition systems, which is characterized in that the multimedia board letter breath
Including multiframe writing on the blackboard image, the multimedia process module includes：
Frame detection module, the frame for detecting the blackboard region in writing on the blackboard image described in every frame；
Frame correction module carries out shape correction for the frame to blackboard region described in writing on the blackboard image described in every frame；
Module is scratched, the region for being surrounded to the frame after being corrected in writing on the blackboard image described in every frame carries out scratching figure, obtains every frame
Stingy figure image.
11. writing on the blackboard acquisition system according to claim 10, which is characterized in that the multimedia collection module be two with
On, the multimedia process module further includes：
Image mosaic module, the stingy figure image that the same time point for being acquired to each multimedia collection module corresponds to frame are spelled
It connects, obtains stitching image.
12. according to claim 1-7 any one of them writing on the blackboard acquisition systems, which is characterized in that further include：
Dynamic detection module, the dynamic detection module are connect with the multimedia collection module communication；
The dynamic detection module exists for carrying out dynamic detection to the blackboard region determining in the blackboard region
The multimedia collection module is controlled when live animal to start.
13. according to claim 1-7 any one of them writing on the blackboard acquisition systems, which is characterized in that further include：
Parameter determination module, for being adopted according to top surface on blackboard region height, blackboard region distance and bottom surface distance, multimedia
Collect vertical line distance of the camera of module apart from upper top surface distance and camera apart from plane where blackboard region, is taken the photograph described in determination
As effective acquisition visual angle of head and pitch angle, to ensure that the camera can collect entire blackboard region.
14. according to claim 1-7 any one of them writing on the blackboard acquisition systems, which is characterized in that further include：
Pose adjustment module, the pitch angle for controlling the camera for adjusting the multimedia collection module, until more matchmakers
Until body acquisition module the image collected includes the frame in complete blackboard region.
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| CN201810442043.3A CN108389438A (en) | 2018-05-10 | 2018-05-10 | A kind of writing on the blackboard acquisition system |
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| CN201810442043.3A CN108389438A (en) | 2018-05-10 | 2018-05-10 | A kind of writing on the blackboard acquisition system |
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