CN109167974A - A kind of writing on the blackboard recording system - Google Patents

A kind of writing on the blackboard recording system Download PDF

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Publication number
CN109167974A
CN109167974A CN201811250575.3A CN201811250575A CN109167974A CN 109167974 A CN109167974 A CN 109167974A CN 201811250575 A CN201811250575 A CN 201811250575A CN 109167974 A CN109167974 A CN 109167974A
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CN
China
Prior art keywords
blackboard
writing
camera
computer
recording system
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811250575.3A
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Chinese (zh)
Inventor
洪磊
Original Assignee
洪磊
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 洪磊 filed Critical 洪磊
Priority to CN201811250575.3A priority Critical patent/CN109167974A/en
Publication of CN109167974A publication Critical patent/CN109167974A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/18Closed circuit television systems, i.e. systems in which the signal is not broadcast
    • H04N7/181Closed circuit television systems, i.e. systems in which the signal is not broadcast for receiving images from a plurality of remote sources
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording

Abstract

The invention discloses a kind of writing on the blackboard recording systems, which is characterized in that the writing on the blackboard recording system includes: computer, camera, microphone, bracket, cable, blackboard;Back-end support is fixed on metope, and bracket front end extends to blackboard surface;Camera and microphone are each attached to bracket front end, and camera and microphone pass through cable and connect with computer, and camera and microphone are respectively used to acquisition video information and audio-frequency information, and the information of acquisition is transferred to computer and is handled;Blackboard is for being write or being shown;Computer is synthesized playable video file or picture for display for handling the video and audio signal of acquisition;Wherein, computer is also used to the real screen that camera is shot being converted to standard picture.System cost is reduced, the usage experience of user is ensured, improves the popularization of this product, serve the raising of whole level of education.

Description

A kind of writing on the blackboard recording system
Technical field
The present invention relates to intellectual education facility fields, and in particular, to a kind of writing on the blackboard recording system.
Background technique
Enter information-based and intelligentized today in society, what the development of IT application in education sector still relatively lagged behind, it is corresponding Product includes the multimedia that most starts to electronic whiteboard, recorded broadcast classroom etc. at this stage, and wherein multimedia equipment is due to can only be It operates and cannot directly be operated on multimedia curtain on computer, lacked very much in interaction, there is no high quality PowerPoint Under the premise of, it is easy to cause the process of attending class uninteresting, the relatively low situation of the learning efficiency of student.And the electronics developed in recent years Interactive whiteboard largely improves this problem, but there is also with high costs, unstable quality for electronic whiteboard, real Utilization rate low situation in border is difficult to accomplish universal and promote on the basis of the unbalanced status of educational resource instantly.Therefore, root According to the state of development of education sector at this stage, it would be highly desirable to which developing a can either adapt to market and user demand and can pass through letter again The new product that single cheap technical approach is realized.
Summary of the invention
The present invention provides a kind of writing on the blackboard recording systems, design and implement mode in realization pair by the system of innovation form Under the premise of the pictures typing such as writing on the blackboard, system cost is reduced as far as possible, ensures the usage experience of user, while improving this product Popularization, serve the raising of whole education infrastructure level.
In a typical teaching environment, classroom/mono- blackboard/constitute basic teaching resource is therefore, black Plate at all teaching occasions indispensabilities equipment.In the information age, by equipment such as multimedia or electronic whiteboards to all Blackboard, which is replaced, is that cost is high and difficult to realize, therefore by being set on the basis of existing blackboard by adding innovation It is standby, and realized in this Equipment Foundations and teaching resource is included, further can by internet by shared education resources, because This is able to realize that educational resource is information-based on cheaper basis of price, by by the shared propagation of classroom instruction resource, Enable high-quality educational resources to obtain more sufficiently and widely propagating, and then promotes the equalization development of educational resource.
For achieving the above object, this application provides a kind of writing on the blackboard recording system, the writing on the blackboard recording system includes:
Computer, camera, microphone, bracket, cable, blackboard;Back-end support is fixed on metope, and bracket front end is to blackboard Surface extends;Camera and microphone are each attached to bracket front end, and camera and microphone pass through cable and connect with computer, Camera and microphone are respectively used to acquisition video information and audio-frequency information, and the information of acquisition is transferred at computer Reason;Blackboard is for being write or being shown;Computer is synthesized for handling the video and audio signal of acquisition For playable video file or picture for display;Wherein, the real screen that computer is also used to shoot camera turns It is changed to standard picture.
Further, the writing on the blackboard recording further includes internet cloud system, and internet cloud system and computer pass through interconnection Net is attached, and internet cloud system is used to carry out network share to the data in computer, and provides network for computer Resource.
Further, the bracket is telescoping shoring column, and the extending direction and length of bracket are adjustable.
Further, the bracket includes: main support, secondary support, metope bracket, and metope bracket is fixed on metope, main Bracket is connect with metope bracket slide, and main support can be slided up and down along the sliding slot on metope bracket;Secondary support and main support slide Connection, secondary support can slide back and forth along the sliding slot on main support;Camera and microphone are each attached on secondary support.
Further, the real screen that camera is shot is converted to standard picture by computer, is specifically included:
In the writing on the blackboard recording system course of work, blackboard standard picture is acquired by camera, is caught first by camera Four virtual criterion points i.e. p1, p2, p3, the p4 grasped, four standard points are located in the visual workspace of blackboard;By right The measuring and calculating of four relative positions obtains the size and proportionate relationship of four edges in the rectangular frame being made of four points;Work as camera shooting When head takes real screen, real screen is input to computer, line segment is equal to according to standard picture middle conductor p1p2 length P3p4 length, line segment p1p3 width are equal to line segment p2p4 width, and it is fixed value that line segment p1p2/ line segment p1p3, which is aspect ratio of the picture, The picture taken adjustment is synthesized standard picture by software by operation principle.
Further, camera, microphone, the single camera shooting acquisition unit of bracket composition, writing on the blackboard recording system includes several Acquisition unit is imaged, several camera shooting acquisition units are connect with computer.
Further, described that complete video file is formed to the lasting photography of target blackboard by writing on the blackboard recording system.
Further, writing on the blackboard recording system is by computer to successively basis is separated by again after every image progress image procossing Time sequencing is by image synthetic video file;Writing on the blackboard recording system, which also passes through computer, eliminate at light environment to image Reason, is sharpened processing to image.
Further, when having shelter in the picture of camera acquisition, writing on the blackboard recording system is unobstructed by previous frame Picture and currently there is a synthesis for blocking picture, realizes and remove in region caused by shelter from picture, when previous frame is unobstructed Picture filled, processing is removed to shelter.
One or more technical solution provided by the present application, has at least the following technical effects or advantages:
The real-time typing to writing on the blackboard is realized by simple apparatus assembly, relative to the recorded broadcast classroom with similar functions Deng using existing blackboard, avoiding buying electronic interactive white board costly, there is apparent cost advantage, while to picture The acquisition in face is more specific single-minded, and the picture after synthesis, which is more clear, to be defined, and enables a viewer to more focal attention Power.Stronger adaptability has been allowed to by modular arrangement.Pass through this special graphics process and acquisition simultaneously Mode the size of file can be greatly lowered, and be more conducive to infrastructure and the discrepant region of economic condition It popularizes.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application Point, do not constitute the restriction to the embodiment of the present invention;
Fig. 1 is the structural schematic diagram of writing on the blackboard recording system in the application;
Fig. 2 is the shooting area schematic diagram of writing on the blackboard recording system in the application;
Fig. 3 is the structural schematic diagram of bracket in the application;
Fig. 4 is the arrangement schematic diagram that several camera shooting acquisitions are single in the application;
Fig. 5 is the standard picture drawing synthesized in the application;
Fig. 6 is the real screen schematic diagram that camera takes in the application;
Fig. 7 is that arm deeply blocks schematic diagram into formation in the picture of blackboard in the application;
Fig. 8 is that shelter treated image schematic diagram is removed in the application;
Fig. 9 is that the other modes such as demonstration instruction form the schematic diagram blocked in the application;
Figure 10 is after removing shelter processing in the application and to be converted into standard picture schematic diagram.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real Applying mode, the present invention is further described in detail.It should be noted that in the case where not conflicting mutually, the application's Feature in embodiment and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also Implemented with being different from the other modes being described herein in range using other, therefore, protection scope of the present invention is not by under The limitation of specific embodiment disclosed in face.
Referring to FIG. 1, this application provides the systems to be mainly made of classroom terminal acquisition and internet cloud system, Wherein classroom terminal acquisition is specifically made of 6 major parts, is respectively: computer 1, camera 2, microphone 3, bracket 4, line Cable 5, blackboard 6.
Wherein computer 1 is used to handle video-audio signal, and is synthesized playable video file or other use In the picture etc. of displaying.Can connect simultaneously internet cloud will treated content uploading to Cloud Server, and then realize that network is total to It enjoys, while can also be copied out file with data line or USB flash disk in the form of single-set operation.
Camera 2 and microphone 3 are used to required video and audio signal in acquisition system, and blackboard 6 is that can write Or other interactive panels that the normal blackboard or blank or electronic whiteboard etc. shown can be write or show.
In systems, camera 2 and microphone 3 are fixed on bracket 4, and bracket 4 is fixed on metope by screw a4, are taken the photograph It is connected as head 2 and microphone 3 pass through cable with computer 1, realizes data transmission and control.
Bracket 4 is made of multiple mobilizable components, and wherein secondary support a1 can be slided on main support a2, and main support a2 can It is slided up and down along the sliding slot on metope bracket a3, is arranged with rotation in the upper surface of main support a2, secondary support a1, metope bracket a3 Tight bolt a5.Elastic by control a5 can be achieved to the position of camera 2 and microphone 3 and the adjustment of angle, and then set In standby installation process, makes the shooting area of camera in such as Fig. 2 according to different environmental aspects, shown in fig. 5 works Predeterminable area.
In system work process, 6 picture of blackboard is acquired by camera 2, since the position of camera is located at blackboard Oblique upper causes the picture taken to will appear transparent effect, therefore during Design of System Software, by as shown in Figure 5 Four virtual point i.e. p1, p2, p3, p4 that calibrating camera 2 is captured, four points are located at the visual workspace of blackboard 6 It is interior.The size of four edges and ratio in the rectangular frame being made of four points can be learnt by the measuring and calculating to four relative positions Example relationship, when video camera takes real screen as shown in FIG. 6, by the way that picture is input to computer 1, according to standard picture P1p2 is equal to p3p4, p1p3 and is equal to p2p4 in face, and p1p2/p1p3 is the operation principle that aspect ratio of the picture is fixed value, by soft The picture taken adjustment is synthesized standard picture as shown in Figure 5 by part.
Thus the picture of forecast scheme configuration and collected audio synthesize video or other types file by computer 1. It such as applies in classroom environment, the speech process record of a complete class can be got off, for remote synchronization teaching or after class The teaching applications such as review.In actual application, since one group of camera picture collected is limited, in order to adapt to different rule The blackboard 6 of lattice, the mode that array can be used arranges several camera shooting acquisition units, as shown in figure 4, computer 1 is to each unit Video information is uniformly processed, to obtain complete content input.
The system can a variety of different result output schemes of flexible choice:
The first scheme: i.e. complete imaging scheme forms complete video file by the continuous photography to target blackboard, 6 content of period blackboard increases or decreases, audio text of the speaker to the operation such as increase and decrease, instruction of writing on the blackboard content and typing simultaneously Part is formed together an audio/video file.
Second scheme: i.e. using it is even when and interruption shooting, every image is carried out after image procossing again by computer 1 Successively according to interval time synthetic video file, since the interval time of every photograph taking is all identical, so final close At picture also will be it is coherent, which finally synthesizes audio/video file together with the recording in microphone 3, in the technology In implementation process, light environment can be eliminated when handling picture to the adverse effect of writing on the blackboard content intact and clarity, while can By being sharpened the clarity that the modes such as processing improve picture and text to picture, and on this basis can also be further using controllable The methods of reduction screen resolution appropriate reduce file size.To be conducive to be promoted the viewing experience and file of user Transmission speed.Requirement of the system to storage space can also be further decreased by reducing file size to reduce the use of system Cost.
In the art, a kind of solution for advanced optimizing user experience is additionally provided, was such as used actual Journey is then needed to go deep into arm to be formed into the picture of blackboard 6 and be blocked when speechmaker needs the writing words on blackboard 6, In as shown in Figure 7, speechmaker writing words c1 on blackboard 6, when the arm c3 of people enters blackboard picture captured by camera 2 The tip point c2 of a directing terminal can be reserved when middle, simultaneously because arm c3 as shelter is entered from blackboard region exterior Picture, so the region that arm c3 is blocked in camera picture is bound to interrupting the edge of blackboard into the i.e. position of c4, with Logic can confirm the position of instruction tip point c2 by the identifying system on computer 1 whereby.Therefore in the process of audio-visual synthesis In can have by the unobstructed picture of previous frame and currently the synthesis for blocking picture, realize area caused by the shelters such as arm Domain is removed from picture, picture of previous frame when unobstructed is filled, further by tip point c2's in computer disposal Location presentation is the sign c5 of other forms, and forms more clean and tidy and clearly picture as shown in Figure 8.
The solution is equally applicable to speaker and indicates a certain emphasis position in writing on the blackboard by arm or other tools Solution, as shown in figure 9, foring blocked area c6 for having existed content when arm enters on blackboard.It is calculating After machine determines tip point c2 through the above scheme, by being filled with picture before to blocked area, blocked to eliminate, most End form is at final effect as shown in Figure 10.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims (9)

1. a kind of writing on the blackboard recording system, which is characterized in that the writing on the blackboard recording system includes:
Computer, camera, microphone, bracket, cable, blackboard;Back-end support is fixed on metope, and bracket front end is to blackboard surface Extend;Camera and microphone are each attached to bracket front end, and camera and microphone pass through cable and connect with computer, camera shooting Head is respectively used to acquisition video information and audio-frequency information with microphone, and the information of acquisition is transferred to computer and is handled; Blackboard is for being write or being shown;Computer is synthesized for handling the video and audio signal of acquisition Playable video file or picture for display;Wherein, the real screen conversion that computer is also used to shoot camera For standard picture.
2. writing on the blackboard recording system according to claim 1, which is characterized in that the writing on the blackboard recording system further includes internet Cloud system, internet cloud system and computer are attached by internet, and internet cloud system is used for the number in computer According to progress network share, and Internet resources are provided for computer.
3. writing on the blackboard recording system according to claim 1, which is characterized in that the bracket is telescoping shoring column, bracket Extending direction and length are adjustable.
4. writing on the blackboard recording system according to claim 1, which is characterized in that the bracket include: main support, secondary support, Metope bracket, metope bracket are fixed on metope, and main support is connect with metope bracket slide, and main support can be along metope bracket Sliding slot slides up and down;Secondary support is slidably connected with main support, and secondary support can slide back and forth along the sliding slot on main support;Camera and Microphone is each attached on secondary support.
5. writing on the blackboard recording system according to claim 1, which is characterized in that the real screen that computer shoots camera Standard picture is converted to, is specifically included:
In the writing on the blackboard recording system course of work, blackboard standard picture is acquired by camera, is captured first by camera Four virtual criterion point, that is, p1, p2, p3, p4, which is located in the visual workspace of blackboard;By to four The measuring and calculating of standard point relative position obtains the size and proportionate relationship of four edges in the rectangular frame being made of four standard points; When camera takes real screen, real screen is input to computer, according to standard picture middle conductor p1p2 length etc. In line segment p3p4 length, line segment p1p3 width is equal to line segment p2p4 width, and line segment p1p2/ line segment p1p3 is that aspect ratio of the picture is solid The picture taken adjustment is synthesized standard picture by software by the operation principle of definite value.
6. writing on the blackboard recording system according to claim 1, which is characterized in that camera, microphone, bracket composition are individually taken the photograph As acquisition unit, writing on the blackboard recording system includes several camera shooting acquisition units, and several camera shooting acquisition units are connect with computer.
7. writing on the blackboard recording system according to claim 1, which is characterized in that described black to target by writing on the blackboard recording system The lasting photography of plate forms complete video file.
8. writing on the blackboard recording system according to claim 1, which is characterized in that writing on the blackboard recording system is by computer to every Image carries out after image procossing again successively according to interval time sequence by image synthetic video file;Writing on the blackboard recording system also passes through Computer carries out image to eliminate light environment processing, is sharpened processing to image.
9. writing on the blackboard recording system according to claim 1, which is characterized in that when camera acquisition picture in have shelter When, writing on the blackboard recording system is by the unobstructed picture of previous frame and currently has the synthesis for blocking picture, and realization will be caused by shelter Region from picture remove, picture of previous frame when unobstructed is filled, processing is removed to shelter.
CN201811250575.3A 2018-10-25 2018-10-25 A kind of writing on the blackboard recording system Pending CN109167974A (en)

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CN201811250575.3A CN109167974A (en) 2018-10-25 2018-10-25 A kind of writing on the blackboard recording system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112416191A (en) * 2020-09-17 2021-02-26 上海哔哩哔哩科技有限公司 Screen recording processing method and device, computer equipment and computer readable storage medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013145349A1 (en) * 2012-03-29 2013-10-03 シャープ株式会社 Image generation device, display device, television receiver, electronic blackboard, digital signage, portable information terminal, display system, image generation method, method, program, and recording medium
CN108632591A (en) * 2018-04-04 2018-10-09 安徽海青智能科技有限公司 A kind of blackboard information regeneration share system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013145349A1 (en) * 2012-03-29 2013-10-03 シャープ株式会社 Image generation device, display device, television receiver, electronic blackboard, digital signage, portable information terminal, display system, image generation method, method, program, and recording medium
CN108632591A (en) * 2018-04-04 2018-10-09 安徽海青智能科技有限公司 A kind of blackboard information regeneration share system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112416191A (en) * 2020-09-17 2021-02-26 上海哔哩哔哩科技有限公司 Screen recording processing method and device, computer equipment and computer readable storage medium

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Application publication date: 20190108