CN113112880A - A video teaching system and method - Google Patents

Abstract

Translated fromChinese

本发明公开了一种视频教学系统及方法，包括：电子信息处理设备、透明投影屏幕以及摄像机，电子信息处理设备与摄像机通信连接；所述透明投影屏幕用于用户进行教学内容的板书；摄像机用于采集用户的教学视频，并将教学视频传输至电子信息处理设备；其中，所述教学视频包括所述用户的正面图像以及所述教学内容；电子信息处理设备用于对教学视频进行预处理并保存。本发明中学生通过观看教学视频可以同时看到老师板书的教学内容以及老师的正面图像，避免了老师对板书的教学内容的遮挡，师生之间可以达到面对面直接交流的效果，提高了沟通效率。

The invention discloses a video teaching system and method, comprising: electronic information processing equipment, a transparent projection screen and a camera, the electronic information processing equipment and the camera are communicatively connected; the transparent projection screen is used for users to write on the blackboard of teaching content; is used to collect the user's teaching video and transmit the teaching video to the electronic information processing device; wherein, the teaching video includes the front image of the user and the teaching content; the electronic information processing device is used to preprocess the teaching video and save. In the present invention, middle school students can see the teaching content written on the blackboard written by the teacher and the frontal image of the teacher at the same time by watching the teaching video, which avoids the blocking of the teaching content written on the blackboard by the teacher, achieves the effect of face-to-face direct communication between teachers and students, and improves communication efficiency.

Description

Video teaching system and method

Technical Field

The invention relates to the technical field of video teaching, in particular to a video teaching system and a video teaching method.

Background

Along with the popularization of internet, online education gradually walks into people's daily life, and online education is including recorded broadcast video teaching and online real-time teaching two kinds, no matter all faces back to the student when recorded broadcast video teaching or online real-time teaching mr's blackboard writing, can cause the teaching content of blackboard writing to shelter from like this on the one hand, and on the other hand student can only see mr's shadow on the back, can't reach the effect of direct face-to-face interchange between teachers and students.

Therefore, the prior art is to be further improved.

Disclosure of Invention

In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a video teaching system and method, so as to solve the problem that teachers and students cannot directly communicate with each other face to face because the teacher is likely to block the contents of the blackboard writing during the blackboard writing in the existing online teaching.

The technical scheme of the invention is as follows:

a video teaching system, comprising: the system comprises an electronic information processing device, a transparent projection screen and a camera, wherein the electronic information processing device is in communication connection with the camera;

the transparent projection screen is used for writing on a blackboard of teaching contents by a user;

the camera is used for collecting teaching videos and transmitting the teaching videos to the electronic information processing equipment; wherein the teaching video comprises a front image of the user and the teaching content;

the electronic information processing equipment is used for preprocessing and storing the teaching video.

The video teaching system, wherein the electronic information processing device further comprises a projector, and the projector is in communication connection with the electronic information processing device;

the projector is used for receiving teaching courseware pre-stored in the electronic information equipment and projecting the teaching courseware to the transparent projection screen for displaying.

The video teaching system, wherein the transparent projection screen comprises a writing area and a projection area;

the blackboard writing area is used for the user to carry out blackboard writing of the teaching content;

the projection area is used for displaying the teaching courseware.

The video teaching system wherein the camera and the user are located on different sides of the transparent projection screen.

The video teaching system, wherein the camera and the projector are located on the same side of the transparent projection screen.

The video teaching system, wherein the camera and the projector are located on different sides of the transparent projection screen.

The video teaching system, wherein, the video teaching system still includes teaching interactive installation, teaching interactive installation with electronic information processing equipment communication connection is used for through electronic information processing equipment control show on the projection screen teaching courseware.

The video teaching system is characterized in that the transparent projection screen comprises a plurality of transparent projection screen units, each transparent projection screen unit comprises at least two layers of optical layered structures, and phase changes of the optical layered structures of the layers are mutually compensated.

The video teaching system is characterized in that the optical axis direction of each layer of the optical layered structure is obliquely arranged relative to the corresponding projection screen unit.

A video teaching method of the video teaching system, comprising:

collecting a teaching video of a user; wherein the teaching video comprises a front image of the user and teaching contents of writing on a transparent projection screen by the user;

preprocessing the teaching video to obtain a preprocessed teaching video;

and storing the preprocessed teaching video.

Has the advantages that: according to the electronic information processing system and the electronic information processing method, the teaching video of the user is collected through the camera, the teaching video is preprocessed and stored through the electronic information processing device, and students can see the teaching content of the blackboard-writing of the teacher and the front image of the teacher at the same time by watching the teaching video, so that the shielding of the teacher on the teaching content of the blackboard-writing is avoided, the effect of direct face-to-face communication between the teacher and the students can be achieved, and the communication efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a video teaching system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a video teaching system according to a second embodiment of the present invention.

Detailed Description

The invention provides a video teaching system and a video teaching method, wherein the video teaching system preprocesses and stores a teaching video acquired by a camera through electronic information processing equipment, a student can acquire the teaching content of a teacher writing on a blackboard through watching the teaching video, the teacher writing on the blackboard cannot shield the teaching content, and meanwhile, the student can communicate with the teacher in a face-to-face mode through the teaching video, so that eye contact communication is realized, and the communication efficiency is improved. In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the embodiments and claims, the terms "a" and "an" can mean "one or more" unless the article is specifically limited.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The traditional teaching mode is that the teacher stands before the blackboard to the form of blackboard writing demonstrates teaching content, and the blackboard is opaque, and the teacher faces the blackboard when blackboard writing, causes the teaching content of blackboard writing easily and shelters from, and the student can only see the teacher's shadow in addition, can't reach the effect of face-to-face direct communication between teachers and students. With the popularization of audio-visual teaching, a projector becomes a standard in teaching, a teacher mainly stands in front of a screen and explains courseware projected by the projector facing the screen, because the projection screen cannot directly write, a blackboard or a whiteboard is arranged beside the screen, when the teacher needs the blackboard writing teaching contents, the teacher faces the blackboard writing teaching contents or the whiteboard, the teaching contents of the blackboard writing are easily shielded, and because the blackboard or the whiteboard is separated from the projection screen, the teacher cannot directly write on the projection courseware contents, the blackboard writing on the blackboard or the whiteboard cannot give visual feeling to the student due to the separation of the blackboard writing and the projection courseware, or the teacher needs to write again or draw the projection contents to solve the problem of the separation of the projection contents and the blackboard writing contents, and the time is wasted. In addition, when the teacher explains the courseware contents on a blackboard or opposite to the screen, the students can only see the back shadow or the side face of the teacher, and the effect of direct face-to-face communication between the teacher and the students cannot be achieved.

In order to solve the above problem, the present invention provides a video teaching system, as shown in fig. 1, which is a schematic structural diagram of a video teaching system provided in an embodiment of the present invention, and the video teaching system includes: the system comprises an electronicinformation processing device 101, atransparent projection screen 103 and acamera 104, wherein the electronicinformation processing device 101 is connected with thecamera 104 in a communication mode. Thetransparent projection screen 103 is used for auser 105 to perform writing on a board of teaching content, and thecamera 104 is used for acquiring the teaching video and transmitting the teaching video to the electronicinformation processing device 101; wherein the instructional video comprises a frontal image of theuser 105 and the instructional content; the electronicinformation processing device 101 is configured to pre-process and store the teaching video. For example, whenuser 105 is the mr, when the mr is towardstransparent projection screen 103 blackboard writing, gather the teaching video that contains the teaching content of mr front image and mr blackboard writing throughcamera 104, and right through electronicinformation processing equipment 101 the teaching video is preserved after carrying out the preliminary treatment, and the student can see the teaching content of mr blackboard writing and the front image of mr simultaneously in the teaching video, has avoided the sheltering from of the teaching content of mr to blackboard writing, can reach the effect of face-to-face direct communication between the teacher and the student.

In a specific embodiment,transparent projection screen 103 surface is provided with one deck glass or stereoplasm transparent plastic, convenience ofcustomers 105 blackboard writing teaching content,transparent projection screen 103 adopts transparent material can not shelter from ambient light, and when the mr when towardstransparent projection screen 103 blackboard writing teaching content,camera 104 permeabletransparent projection screen 103 gathers contain the mr front image and the teaching video of the teaching content of mr blackboard writing, and the student can see the teaching content of mr blackboard writing through watching the teaching video, has avoided sheltering from of the teaching content of mr to blackboard writing, and the student can realize exchanging with mr's eye-ward through the mr front image in the teaching video, improves communication efficiency.

In a specific embodiment, the video teaching system further includes aprojector 102, theprojector 102 is in communication connection with the electronicinformation processing device 101, a teaching courseware is stored in the electronicinformation processing device 101 in advance, the electronicinformation processing device 101 is further configured to transmit the teaching courseware stored in advance to theprojector 102, theprojector 102 is configured to project the teaching courseware onto thetransparent projection screen 103, and the teaching video collected by thecamera 104 further includes the teaching courseware. In the teaching process, when a teacher needs to explain the content of a teaching courseware, the teaching courseware content is transmitted to theprojector 102 through the electronicinformation processing equipment 101, the teaching courseware is projected to thetransparent projection screen 103 through theprojector 102 to be displayed, and meanwhile, the teaching video of the teacher is collected through thecamera 104.

In some embodiments, the projector has a play function, the camera has image preprocessing and saving means, and a separate electronic information processing device may not be required.

With continued reference to fig. 1, thetransparent projection screen 103 is shown to include a projectedarea 1031 and a blackboard-writing area 1032, the blackboard-writing area 1032 being used for blackboard-writing teaching content by theuser 105, the projectedarea 1031 being used for displaying teaching courseware. In the teaching process, the teacher can show through the teaching video thatcamera 104 gathered at the teaching content ofblackboard writing district 1032 blackboard writing, and the teacher can not cause the teaching content to shelter from when carrying out blackboard writing towardsblackboard writing district 1032, and the student can carry out the eye-to-eye with the mr through watching the teaching video and exchange, improves communication efficiency. Of course, theprojection area 1031 may be the entiretransparent projection screen 103 in this embodiment, and thebook area 1032 may also be the entiretransparent projection screen 103, which is not limited in this embodiment.

As shown in fig. 1, thecamera 104 and the user are located on different sides of thetransparent projection screen 103, and thecamera 104 and theprojector 102 are located on the same side of thetransparent projection screen 103, that is, theprojector 102 projects in a rear projection manner, since thecamera 104 and the teaching content are located on different sides of thetransparent projection screen 103, and the teaching content shot by thecamera 104 is actually opposite to the teaching content of the teacher blackboard-writing, the electronicinformation processing device 101 is required to pre-process the teaching video, that is, turn the teaching video by 180 °, so that the teaching content in the teaching video watched by the student is in the same direction as the teaching content of the teacher blackboard-writing.

In a specific embodiment, the video teaching system further includes a writing board pen, and the teaching content of writing board on thetransparent projection screen 103 can be clearly displayed by the writing board pen without affecting the transparency of thetransparent projection screen 103. In a specific embodiment, the blackboard writing pen is a highlighter pen.

In a specific embodiment, the video teaching system further comprises a teaching interaction device, the teaching interaction device is connected with the electronicinformation processing equipment 101 and used for controlling the teaching courseware displayed on thetransparent projection screen 103 through the electronicinformation processing equipment 101, and the teaching interaction device is a transparent touch display screen, an attitude detector and the like.

In one embodiment, thetransparent projection screen 103 includes a plurality of transparent projection screen units, each including at least two layers of optical layered structures, wherein the phase change of each layer of optical layered structure can be compensated by the other layers of optical layered structures, such that thetransparent projection screen 103 can maintain the polarization state of the projected image.

Further, each layer of optical layered structure is configured to include any one or two of an optical dielectric film and a metal film, and can play a role of phase compensation by selecting the material and designing the thickness of the medium constituting each layer of optical layered structure, so that the phase and amplitude changes generated by one layer of optical layered structure can be compensated by the other layer of optical layered structure. In order to obtain a certain angular distribution of the light reflected by thetransparent projection screen 103, the optical axis direction of each layer of the optical layered structure is inclined with respect to its corresponding projection screen unit, and the inclination angle and the distribution thereof are designed according to the viewing angle requirement of theprojection screen 104, generally within +/-20 degrees to +/-45 degrees.

As shown in fig. 2, a schematic structural diagram of a video teaching system according to a second embodiment of the present invention is shown, where the video teaching system includes: the system comprises an electronicinformation processing device 201, atransparent projection screen 203 and acamera 204, wherein the electronicinformation processing device 201 is connected with thecamera 204 in a communication mode. Thetransparent projection screen 203 is used for writing on a blackboard of teaching contents by auser 205; thecamera 204 is configured to collect the teaching video and transmit the teaching video to the electronicinformation processing device 201; wherein the instructional video comprises a frontal image of theuser 205 and the instructional content; the electronicinformation processing device 201 is used for preprocessing and storing the teaching video. For example, whenuser 205 is the mr, when the mr is towardstransparent projection screen 203 blackboard writing, gather the teaching video who contains the teaching content of mr front image and mr blackboard writing throughcamera 204, and right through electronicinformation processing equipment 201 the teaching video keeps after carrying out the preliminary treatment, and the student can see the teaching content of mr blackboard writing and the front image of mr simultaneously in the teaching video, has avoided the sheltering from of the teaching content of mr to blackboard writing, can reach the effect of face-to-face direct communication between the teacher and the student.

In a specific embodiment,transparent projection screen 203 surface is provided with one deck glass or stereoplasm transparent plastic, convenience ofcustomers 205 blackboard writing teaching content,transparent projection screen 203 adopts transparent material can not shelter from ambient light, and when the mr whentransparent projection screen 203 blackboard writing teaching content,camera 204 permeabletransparent projection screen 203 gathers contain the mr front image and the teaching video of the teaching content of mr blackboard writing, the student can see the teaching content of mr blackboard writing through watching the teaching video, has avoided sheltering from of the teaching content of mr to blackboard writing, and the student can realize exchanging with mr's eye-ward through the mr front image in the teaching video, improves communication efficiency.

In a specific embodiment, the video teaching system further includes aprojector 102, theprojector 102 is in communication connection with the electronicinformation processing device 101, a teaching courseware is stored in the electronicinformation processing device 201 in advance, the electronicinformation processing device 201 is further configured to transmit the teaching courseware stored in advance to theprojector 202, theprojector 202 is configured to project the teaching courseware onto thetransparent projection screen 203, and the teaching video collected by thecamera 204 further includes the teaching courseware. In the teaching process, when a teacher needs to explain the content of a teaching courseware, the teaching courseware content is transmitted to theprojector 202 through the electronicinformation processing equipment 201, the teaching courseware is projected to thetransparent projection screen 203 through theprojector 202 to be displayed, and meanwhile, the teaching video of the teacher is collected through thecamera 204.

With continued reference to fig. 2, thetransparent projection screen 203 is shown to include aprojection area 2031 and awriting area 2032, thewriting area 2032 being used for writing tutorials by theuser 205, and theprojection area 2031 being used for displaying tutorials. In the teaching process, the teaching content of the teacher writing on blackboard in thewriting area 2032 can be displayed through the teaching video collected by thecamera 104, the teacher can not shield the teaching content when writing on blackboard towards thewriting area 2032, and the student can communicate with the teacher through watching the teaching video, so that the communication efficiency is improved. Of course, theprojection area 2031 may be the entiretransparent projection screen 203 in this embodiment, and thewriting area 2032 may also be the entiretransparent projection screen 203, which is not limited in this embodiment.

With continued reference to fig. 2, thecamera 204 and the user are located on different sides of thetransparent projection screen 203, thecamera 204 and theprojector 202 are located on different sides of thetransparent projection screen 203, that is, theprojector 202 and theuser 205 are located on the same side of thetransparent projection screen 203, theprojector 202 projects in a front projection manner, and since thecamera 204 and the teaching content are located on different sides of thetransparent projection screen 203 and the video image captured by thecamera 204 is actually reversed, the electronicinformation processing device 201 is required to reverse the teaching video, that is, reverse the teaching video by 180 °, so that the teaching content in the teaching video viewed by the student is in accordance with the direction of the teaching content of the teacher blackboard-writing.

In a specific embodiment, the video teaching system further comprises a writing board pen, and the teaching content of writing on thetransparent projection screen 203 can be clearly displayed through the writing board pen without affecting the transparency of thetransparent projection screen 203. In a specific embodiment, the blackboard writing pen is a highlighter pen.

In a specific embodiment, the video teaching system further includes a teaching interaction device, the teaching interaction device is connected to the electronicinformation processing device 201, and is used for controlling the teaching courseware displayed on thetransparent projection screen 203 through the electronicinformation processing device 201, and the teaching interaction device is a transparent touch display screen, an attitude detector and the like.

In one embodiment, thetransparent projection screen 203 comprises a plurality of transparent projection screen units, each transparent projection screen unit comprising at least two layers of optical layered structures, wherein the phase change of each layer of optical layered structure can be compensated by the other layers of optical layered structures, such that thetransparent projection screen 203 can maintain the polarization state of the projected image.

Further, each layer of optical layered structure is configured to include any one or two of an optical dielectric film and a metal film, and can play a role of phase compensation by selecting the material and designing the thickness of the medium constituting each layer of optical layered structure, so that the phase and amplitude changes generated by one layer of optical layered structure can be compensated by the other layer of optical layered structure. In order to obtain a certain angular distribution of the light reflected by thetransparent projection screen 203, the optical axis direction of each layer of the optical layered structure is inclined relative to its corresponding projection screen unit, and the inclination angle and the distribution thereof are designed according to the requirement of the viewing angle of theprojection screen 203, and are generally within +/-20 degrees to +/-45 degrees.

Based on the video teaching system, the invention also provides a video teaching method, which comprises the following steps:

s100, collecting a teaching video of a user; wherein the teaching video comprises a front image of the user and teaching contents of writing on a transparent projection screen by the user;

s200, preprocessing the teaching video to obtain a preprocessed teaching video S300, and storing the preprocessed teaching video.

Specifically, when the video teaching system is used for video teaching, firstly, a teaching video of a user is collected, then the teaching video is preprocessed to obtain the preprocessed teaching video, wherein the teaching video comprises a front image of the user and teaching contents of a blackboard writing of the user on a transparent projection screen, and finally, the preprocessed teaching video is stored. When carrying out the teaching, the student can see the teaching content of mr blackboard writing and mr's positive image simultaneously through watching the teaching video, has avoided mr to the sheltering from of the teaching content of blackboard writing, can reach the effect of face-to-face direct communication between teacher and the student, has improved communication efficiency.

In summary, the present invention provides a video teaching system and method, including: the system comprises an electronic information processing device, a transparent projection screen and a camera, wherein the electronic information processing device is in communication connection with the camera; the transparent projection screen is used for writing on a blackboard of teaching contents by a user; the camera is used for collecting the teaching video and transmitting the teaching video to the electronic information processing equipment; wherein the teaching video comprises a front image of the user and the teaching content; the electronic information processing equipment is used for preprocessing and storing the teaching video. According to the electronic information processing system and the electronic information processing method, the teaching video of the user is collected through the camera, the teaching video is preprocessed and stored through the electronic information processing device, and students can see the teaching content of the blackboard-writing of the teacher and the front image of the teacher at the same time by watching the teaching video, so that the shielding of the teacher on the teaching content of the blackboard-writing is avoided, the effect of direct face-to-face communication between the teacher and the students can be achieved, and the communication efficiency is improved.

It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (10)

Translated fromChinese

1.一种视频教学系统，其特征在于，包括：电子信息处理设备、透明投影屏幕以及摄像机，所述电子信息处理设备与所述摄像机通信连接；1. A video teaching system, characterized in that, comprising: an electronic information processing device, a transparent projection screen and a camera, the electronic information processing device being communicatively connected with the camera;所述透明投影屏幕用于用户进行教学内容的板书；The transparent projection screen is used for the user to write on the blackboard of the teaching content;所述摄像机用于采集教学视频，并将所述教学视频传输至所述电子信息处理设备；其中，所述教学视频包括所述用户的正面图像以及所述教学内容；The camera is used to collect teaching video and transmit the teaching video to the electronic information processing device; wherein, the teaching video includes the front image of the user and the teaching content;所述电子信息处理设备用于对所述教学视频进行预处理并保存。The electronic information processing device is used for preprocessing and saving the teaching video.2.根据权利要求1所述的视频教学系统，其特征在于，所述电子信息处理设备还包括投影仪，所述投影仪与所述电子信息处理设备通信连接；2. The video teaching system according to claim 1, wherein the electronic information processing device further comprises a projector, and the projector is connected in communication with the electronic information processing device;所述投影仪用于接收所述电子信息设备中预先存储的教学课件，并将所述教学课件投影至所述透明投影屏幕进行显示。The projector is used for receiving teaching courseware pre-stored in the electronic information device, and projecting the teaching courseware on the transparent projection screen for display.3.根据权利要求2所述的视频教学系统，其特征在于，所述透明投影屏幕包括板书区和投影区；3. The video teaching system according to claim 2, wherein the transparent projection screen comprises a blackboard writing area and a projection area;所述板书区用于所述用户进行所述教学内容的板书；The blackboard writing area is used for the user to write on the blackboard of the teaching content;所述投影区用于显示所述教学课件。The projection area is used for displaying the teaching courseware.4.根据权利要求2所述的视频教学系统，其特征在于，所述摄像机与所述用户位于所述透明投影屏幕的不同侧。4. The video teaching system according to claim 2, wherein the camera and the user are located on different sides of the transparent projection screen.5.根据权利要求4所述的视频教学系统，其特征在于，所述摄像机与所述投影仪位于所述透明投影屏幕的同一侧。5. The video teaching system according to claim 4, wherein the camera and the projector are located on the same side of the transparent projection screen.6.根据权利要求4所述的视频教学系统，其特征在于，所述摄像机与所述投影仪位于所述透明投影屏幕的不同侧。6. The video teaching system according to claim 4, wherein the camera and the projector are located on different sides of the transparent projection screen.7.根据权利要求2所述的视频教学系统，其特征在于，所述视频教学系统还包括教学互动装置，所述教学互动装置与所述电子信息处理设备通信连接，用于通过所述电子信息处理设备控制所述透明投影屏幕上显示的所述教学课件。7 . The video teaching system according to claim 2 , wherein the video teaching system further comprises a teaching interactive device, and the teaching interactive device is communicatively connected with the electronic information processing device, and is used for passing the electronic information through the electronic information processing device. 8 . The processing device controls the teaching courseware displayed on the transparent projection screen.8.根据权利要求1所述的视频教学系统，其特征在于，所述透明投影屏幕包括若干透明投影屏幕单元，每一所述透明投影屏幕单元包括至少两层光学层状结构，其中，各层所述光学层状结构的相位变化相互补偿。8. The video teaching system according to claim 1, wherein the transparent projection screen comprises a plurality of transparent projection screen units, each of the transparent projection screen units comprises at least two layers of optical layered structures, wherein each layer The phase changes of the optical layered structures compensate each other.9.根据权利要求8所述的视频教学系统，其特征在于，每层所述光学层状结构的光轴方向相对其对应的投影屏幕单元倾斜设置。9 . The video teaching system according to claim 8 , wherein the optical axis direction of each layer of the optical layered structure is inclined relative to its corresponding projection screen unit. 10 .10.一种如权利要求1～9任一项所述的视频教学系统的视频教学方法，其特征在于，包括：10. A video teaching method for a video teaching system according to any one of claims 1 to 9, characterized in that, comprising:采集用户的教学视频；其中，所述教学视频包括所述用户的正面图像以及所述用户在透明投影屏幕上板书的教学内容；Collect a user's teaching video; wherein, the teaching video includes the front image of the user and the teaching content written by the user on the transparent projection screen;对所述教学视频进行预处理，得到预处理后的教学视频；对预处理后的所述教学视频进行保存。Preprocessing the teaching video to obtain a preprocessed teaching video; and saving the preprocessed teaching video.

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