TWI505242B - System and method for digital teaching - Google Patents

Description

Digital teaching system and method

The present invention relates to a digital teaching system and method, and more particularly to a digital teaching system and method for photographing teaching pictures according to directions or areas of interest of participants.

In the existing teaching video system, video recording of the video stream of the teaching process is mainly carried out by means of human operation. The staff who operate the video not only need to participate in the teaching process, but also need to understand the content of the class of the teacher, in order to correctly capture the teaching content of the teacher.

In order to save the manpower of video recording and adopt automatic video recording, the video system still cannot directly track the position of the teacher to determine the location of the shooting. In other words, the content that the instructor tells may be that the image needs to be viewed in conjunction with the movement of the instructor, or it may be in conjunction with the text written by the instructor on the blackboard.

In view of this, it is necessary to invent an identification and video recording system that can cooperate with the teaching content of the teaching staff, so as to coordinate the teaching of the teaching materials to automatically perform video streaming video recording.

The present invention provides a digital teaching system and method for photographing a teacher and a participant using two photographic devices. Analyze the paintings of the participants In the face, the control signal is generated by the face turning angle of the participant or the line of sight of the eyeball, and the photographing device of the other photographing teacher or teaching area is controlled by the control signal according to the angle of the face of the majority participant or the eyeball line of sight. The direction of the teaching process to achieve the purpose of automated shooting teaching content, thereby reducing human resources and improving the accuracy of the video.

To achieve the above object, the digital teaching system of the present invention has a first photographing device and a second photographing device. The first photographing device is configured to photograph the learning environment screen, and generates a control signal to the second photographing device according to the attention information, wherein the attention information corresponds to the attention area. The second photographing device is controlled by the control signal generated by the first photographing device for photographing the teaching screen associated with the attention area. Attention information is associated with multiple target personnel in the learning environment screen, and is designated as the attention area according to the direction or region that most target personnel in the target person pay attention to.

The digital teaching method of the present invention has the following steps. The learning environment screen is taken with the first photographing device. According to the attention information, the control signal is generated, wherein the attention information corresponds to an attention area, and is associated with a plurality of target persons in the learning environment picture, and is designated as the attention area according to the attention direction or area of the majority target person in the target person. According to the control signal, the teaching picture associated with the attention area is taken by the second photographing device.

In summary, the present invention provides a digital teaching system and method for photographing a participant using a first photographing device and photographing a teacher using a second photographing device. The participant's face photographed by the first photographing device analyzes the face turning angle of the participant or the line of sight of the eyeball to generate control The signal is given to the second photographing device, so that the second photographing device is controlled by the control signal to photograph the teacher or the teaching area. Since the first photographing device generates the control signal according to the analysis result of the majority of the participant's face turning angle or the eyeball line of sight direction, the second photographing device can accurately capture the direction of the content or the teaching content indicated by the instructor, Achieve the purpose of automated shooting of teaching content, thereby reducing human resources and improving the accuracy of video recording.

The above description of the disclosure and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention, and to provide further explanation of the scope of the invention.

10‧‧‧teaching classroom

11‧‧‧First camera

13‧‧‧Second photography device

15‧‧‧Attention area

17‧‧‧teaching area

171‧‧‧Blackboard

173‧‧‧teachers

19‧‧‧ study environment area

191‧‧‧teaching tables and chairs

193‧‧‧Participants

30‧‧‧Learning environment screen

31‧‧‧ Target personnel

50‧‧‧teaching classroom

51‧‧‧First camera

52‧‧‧Control device

53‧‧‧Second photography device

531, 531A~531D‧‧‧ shooting area

55, 55a, 55b‧‧‧ Attention area

57‧‧‧teaching area

571‧‧‧Blackboard

59‧‧‧ study environment area

591‧‧‧Participants

70‧‧‧Learning environment screen

71‧‧‧Preset area

73, 73a~73f‧‧‧ target personnel

731‧‧‧ angle

1 is a schematic diagram of a digital teaching system drawn in accordance with an embodiment of the present invention.

2 is a schematic diagram of a learning environment screen drawn in accordance with an embodiment of the present invention.

Figure 3 is a schematic diagram of a digital teaching system drawn in accordance with another embodiment of the present invention.

Figure 4 is a schematic diagram of a learning environment picture drawn in accordance with another embodiment of the present invention.

Fig. 5 is a schematic view of a photographing area drawn according to another embodiment of the present invention.

Figure 6 is a target person face drawn according to another embodiment of the present invention. A schematic view of the steering angle or the direction of the eye's line of sight.

Figure 7 is a flow chart of a digital teaching method in accordance with an embodiment of the present invention.

Figure 8 is a flow chart of a digital teaching method drawn in accordance with another embodiment of the present invention.

Figure 9 is a flow chart for analyzing the direction or region of interest of each target person in the learning environment picture in accordance with yet another embodiment of the present invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

Referring to FIG. 1 and FIG. 2 together, FIG. 1 is a schematic diagram of a digital teaching system according to an embodiment of the present invention, and FIG. 2 is a learning environment picture drawn according to an embodiment of the present invention. As shown in the figure, the digital teaching system has a first photographing device 11 and a second photographing device 13, wherein the first photographing device 11 is configured to capture a learning environment screen and generate a control signal to the second according to the attention information. Photographic device 13. The attention information on which the first photographing device 11 is based may be an electric signal generated by the external device or the first photographing device 11. The electrical signal is obtained by the external device or the first imaging device 11 after analyzing the learning environment screen. Analog or digital signal. The attention information is associated with the plurality of target persons 31 in the learning environment screen 30, and among the plurality of target persons 31 in the learning environment screen 30, the direction or region in which the plurality of target persons 31 are focused is designated as the attention area 15, in other words The attention information can also be regarded as corresponding to the attention area 15 that most target personnel 31 are concerned about.

The second photographing device 13 is controlled by the control signal generated by the first photographing device 11, and photographs the teaching screen associated with the attention area 15 according to the control signal. The attention area 15 may refer to an area location of an entity, and the range of the attention area 15 may be a union of a plurality of target persons' attention areas, or a specific area range that is outwardly expanded centering on a majority target person's attention direction. For example, the second photographing device 13 can have a shooting range and be photographed in a direction that most target personnel pay attention to, so that the attention area 15 can be covered within the photographing range of the second photographing device 13, as shown in FIG. The attention area 15 is an area on the blackboard 171, and the attention area 15 is included in the shooting range of the second photographing apparatus.

To explain the digital teaching system of the present invention in more detail, by way of practical example, as shown in the teaching classroom 10 shown in FIG. 1, the teaching classroom 10 can be divided into a teaching area 17 and a learning environment area 19. The teaching area 17 may be a teaching area where the podium, the blackboard 171, the whiteboard or the teacher 173 is located, and the learning environment area 19 may be a teaching table and chair 191 for the participant 193 or the learning area where the learner is located. The first photographing device 11 is disposed in front of the teaching classroom 10, for example, in the teaching area 17, for photographing the participant 193 toward the learning environment area 19. The second photographing device 13 may be disposed at the rear of the teaching classroom 10, such as within the learning environment region 19, for To the teaching area 17, the blackboard 171 or the teacher 173 is photographed. In this embodiment, the positions of the first photographing device 11 and the second photographing device 13 are only for convenience of explanation, and the present invention does not limit the installation positions of the first photographing device 11 and the second photographing device 13.

In the present embodiment, the first photographing device 11 regards the screen photographed by the participant 193 in the learning environment area 19 as the learning environment screen 30. The first photographing device 11 or other external device will analyze the image of the participant 193 in the learning environment screen 30 to participate in the direction of attention or the steering angle of the face of the participant 193 in the image of the participant 193 as the attention information, and according to the participation. The direction in which the person 193 is in line of sight or the steering angle of the face corresponds to the physical area of interest of the participant 193 as the attention area 15. For example, when the direction or area of interest of the participant 193 is in the middle of the blackboard 171, the first photographing device 11 or the external device will analyze the direction of the line of sight of the participant 193, and correspondingly find out the attention of the participant. The physical area should be the middle of the blackboard 171, and the middle of the blackboard 171 is taken as the attention area 15, and a control signal is generated to the second photographing device 13.

The first photographing device 11 or other external device may select to analyze the images of all the participants 193 in the learning environment screen 30, and may also select the images of the participants 193 for analysis. For example, when the image of the participant 193 in the learning environment screen 30 is too small, the direction of the attention is too large with the direction of the other participants, or the seat of the participant is too remote, the participants who do not meet the conditions will be removed. The image is analyzed with the remaining participant 193 image as the target person 31 to generate an analysis result associated with the attention area 15. participant The possibility that the image of the member 193 is too small includes the participant's 193's seat far away or the portrait of the staff, teaching assistant or classroom arrangement behind the teaching classroom 10, and the non-participating participants in the teaching process 193, not listed Target personnel are used as the basis for analysis. The possibility that the direction of concern and the direction of other participants are too large may include participants 193 bowing, sleeping or not paying attention to class, so participants who are concerned with the direction of other participants may be considered as not participating in the teaching. The process is also not listed as a target person.

The first photographing device 11 or the external device generates a control signal for transmission to the second photographing device 13 based on the result of analyzing the direction of the line of sight of the target person 31 in the learning environment screen 30 or the head steering, by the second photographing device 13 According to the received control signal, the direction or area indicated by the steering control signal is taken, and the attention area 15 is photographed to generate a teaching picture associated with the attention area 15. The teaching screen may be a video stream captured by the instructor 173 or the blackboard 171 (according to the direction of the participant 193) to instantly play or store the teaching content of the instructor 173 in other teaching classrooms for other people. .

Referring to FIG. 3, FIG. 3 is a schematic diagram of a digital teaching system according to another embodiment of the present invention. As shown in FIG. 3, the digital teaching system further includes a control device 52. The control device 52 is configured to analyze the direction or region of interest of each target person in the learning environment screen, and determine the direction or region of the target person that most target personnel pay attention to, thereby generating attention information and determining the attention area 55. The control device 52 is coupled to the first photographing device 51 for receiving the learning environment image captured by the first photographing device 51 and analyzing the participants in the learning environment screen. The image of the member 591, wherein the control device 52 is not limited to being externally connected or built in the first photographing device 51. The control device 52 selects the image of the part of the participants 591 in the learning environment screen as the target person, and analyzes the direction and region of interest of the majority of the target persons in the target person to generate attention information.

In practice, the manner in which the control device 52 selects the target person, wherein the first method may be to analyze the face size of the participant 591 image in the learning environment screen, and the participant whose face size is greater than the first threshold value 591 The image is set as the target person. The second method may be to analyze the direction or region of the participant 591 in the learning environment picture, and set the participant's image in which the direction or region of interest is within the effective range as the target person. For example, analyzing the face size of the participant 591 in the learning environment picture, when the face size of the participant 591 in the learning environment picture is small, indicating that the participant 591 is away from the first photographing device 51 (or the teaching area 57) The location is far away and has less value for reference, so those with smaller face sizes are not selected as target personnel. For another example, the direction or region of the participant 591 in the learning environment screen is analyzed. When the direction or region of the participant 591 in the learning environment screen exceeds the preset angle, if the participant 591 is not paying attention to the teaching area 57, the candidate is not selected. As a target person. For example, when the direction of the head rotation of the participant 591 is opposite to the direction of the line of sight of the eye, when the participant 591 closes the eye in the learning environment picture, or the area of the face of the participant 591 is over the preset ratio, the selection is not selected. Target personnel.

Then, after the target device is selected by the control device 52, the steering angle of each target person's face or the line of sight of the eyeball is calculated to analyze each target person. The direction and area of concern of the staff. The attention area 55 is judged based on the direction or area that most target personnel pay attention to, and attention information corresponding to the attention area 55 is generated. For example, when more than half of the target personnel are in the same direction or area of interest, the direction or area is expressed as the direction or area of interest of most target personnel. Most of the criteria can also be presupposed by two-thirds of the target personnel. In other words, when two-thirds of the target personnel are viewing the same direction or region, the direction or region is the direction of majority attention. Or the region, the invention is not limited to the majority of the criteria. In addition, attention to the same direction or region does not mean completely the same direction. In the case where the participant 591 views the face of the teacher 575, each participant 591 is located at a different position, and the direction of the face of the teacher 575 is of course viewed. Different, therefore, the criteria for focusing on the same direction or region are mainly from the perspective of the target, in other words, when the participant 591 is also concerned with the face of the teacher 575, the viewer can see the face of the teacher 575. Personnel 591 focuses on the same direction or area.

After the control device 52 analyzes the learning environment screen captured by the first photographing device 51, the control device 52 transmits the generated attention information to the first photographing device 51, and the first photographing device 51 generates the control signal according to the attention information. The second photographing means 53 is controlled. The attention area 57 is photographed by the second photographing device 53 in accordance with the control signal to generate a teaching screen. It should be noted that the present invention does not limit the control signal generated by the first photographing device 51, and the control signal can also be directly transmitted from the control device 52 to the second photographing device 53.

Please refer to Figure 3 to Figure 6 together. Figure 4 is based on this A schematic diagram of a learning environment picture drawn by another embodiment of the invention, FIG. 5 is a schematic diagram of a photographing area drawn according to another embodiment of the present invention, and FIG. 6 is a diagram drawn according to another embodiment of the present invention. A schematic diagram of a person's face turning angle or eyeball direction of sight, as shown in the figure, in another embodiment of the present invention, the control device 52 may also select a target person 73 from a preset area 71 of the learning environment screen 70, such as Figure 4 shows. The preset area 71 may be a participant in the middle of the first two rows of seats, or other suitable preset area 71 selection manner, which is not limited in this embodiment.

On the other hand, the second photographing device 53 may be provided with a plurality of adjacent photographing regions 531. As shown in FIG. 5, the blackboard 571 or the whiteboard is divided into the photographing regions 531A to 531D as an example. When the first photographing device 51 or the control device 52 analyzes the attention area 55 obtained by the target person 73 as one of the photographing areas 531, the second photographing device 53 will photograph with the photographing area 531 corresponding to the attention area 55. Teaching screen. For example, when the attention area 55a shown in FIG. 5 is located in the imaging area 531A, the second imaging device 53 performs imaging of the teaching screen on the imaging area 531A. In this embodiment, in order to explain the shooting of the photographing area 531 in which the attention area 55 is located in the present embodiment, the teacher 575 writes the blackboard in the blackboard 573, because the teacher 575 writes on the blackboard 573. It is not written to the right by the left side of the blackboard 573. Generally speaking, the board book will be written in a section, so the width of the shooting area 531 can also be set corresponding to the section written by the teacher 575 board book. When the direction in which the participant 591 is concerned (corresponding to the attention area 55) is located in one of the shooting areas 531, the second photographing device 53 will capture the entire shooting area. 531, the photographed teaching screen can be made more complete and the second photographing device 53 is also less likely to change because the participant 591 moves the direction of interest.

When the attention area 55 is located between the adjacent areas of the photographing area 531, the second photographing means 53 selects one of the two photographing areas 531 adjacent to photograph the teaching picture. For example, as shown in FIG. 5, when the attention area 55b is located between the photographing area 531B and the photographing area 531C, the second photographing apparatus selects one of the photographing area 531B or the photographing area 531C to perform photographing of the teaching screen. The manner in which the photographing area 531 is selected may be a ratio in which the analysis attention area 55b is located in the photographing area 531B and in the photographing area 531C, in order to occupy a larger proportion as an option. As shown in FIG. 5, the ratio of the attention area 55b in the imaging area 531C is larger than the ratio in the imaging area 531B, and therefore the second imaging device 53 performs imaging of the teaching screen on the imaging area 531C.

As the attention area 55b shown in FIG. 5, the second photographing means 53 selects the photographing area 531 in a manner that the left photographing area 531 can be preset as a selection. In other words, when the attention area 55b is located between the shooting area 531B and the shooting area 531C, the second photographing means 53 presets the photographing area 531 (i.e., the photographing area 531B) to the left to perform photographing.

In this embodiment, the target personnel 73 in the preset area 71 may also correspond to different coordinates. The control device 52 or the first photographing device 51 is further provided with a plurality of viewing angle correspondence tables, and each of the viewing angle correspondence tables is provided corresponding to a different coordinate of the target person 73, for example, the target person 73a shown in FIG. 73f has corresponding angle of view corresponding to the coordinate position according to different coordinate positions thereof table.

The control device 52 or the first photographing device 51 calculates the face turning angle 731 of each target person 73 or the line of sight direction of each eyeball according to a different angle of view correspondence table for each coordinate position, thereby analyzing the direction or region of interest of each target person 73. . Taking the target persons 73a to 73f shown in FIGS. 4 and 6 as an example, the angle of view correspondence table is generated according to the positions of the target persons 73a to 73f and the relative positions of the imaging regions 531A to 531D, respectively, wherein the target person 73a, The viewing angle correspondence tables of 73c, 73d, and 73f are as follows in Table 1, Table 2, Table 3, and Table 4, respectively.

When the target person 73a has a face turning angle or a line of sight of the eyeball is When 0° (as shown in Fig. 6), it means that the target person 73a has no steering on his face, and the line of sight of the eyeball is also directed straight ahead. In contrast to the angle of view correspondence table (Table 1) of the target person 73a, 0° falls in the imaging area 531D, so that it is understood that the target person 73a is paying attention to the imaging area 531D. When the target person's 73c face turning angle or the eyeball's line of sight direction is 30°, it means that the target person 73c faces 30 degrees clockwise or the eyeball's line of sight is viewed in a clockwise direction of 50°. The angle of view correspondence table (Table 2) is 30° in the imaging area 531D, and the target person 73c is also paying attention to the imaging area D. When the target person's 73d face steering angle or the eyeball's line of sight direction is 50°, it means that the target person 73d faces 50 degrees clockwise or the eyeball's line of sight is viewed in a clockwise direction of 50°. In the angle of view correspondence table (Table 3) of the target person 73d, 50° corresponds to the imaging area 531C or the imaging area 531D, and the display target person 73d is also paying attention to the imaging area 531C or the imaging area 531D. When the target person's 73f face steering angle or the eyeball's line of sight direction is 70°, it means that the target person 73f's face or the eyeball's line of sight is turned in a clockwise direction of 70°. According to the angle of view correspondence table (Table 4) of the target person 73f, the 70° corresponds to the imaging area 531D, and therefore the target person 73f pays attention to the imaging area 531D. The target person's 73 face turning angle or the line of sight of the eyeball can directly look at the angle between the direction of the front and the direction of rotation of the face, as shown by the angle 731 shown in FIG.

In the case of the target persons 73a to 73f, the target persons 73a, 73c, 73d, and 73f are analyzed to focus on the photographing area 531D, and thus the photographing area 531D is regarded as the attention area 55, and the second photographing device 53 associates the photographing with the photographing area. 531D teaching screen. In the present embodiment, the foregoing Tables 1 to 4 are for convenience of description and do not limit the embodiments of the present invention.

In order to explain the digital teaching method of the present invention, the following description will be made in conjunction with the digital teaching system of the present invention. Please refer to FIG. 3 and FIG. 7 together. FIG. 7 is a flow chart of a digital teaching method according to an embodiment of the present invention. As shown in the figure, in step S201, the learning environment screen is taken by the first photographing device 51 to the learning environment area 59, for example, the face image capturing is performed on the participant 591 in the learning environment area 59. In step S203, the digital teaching system generates a control signal according to the attention information, wherein the attention information may be analyzed by the first photographing device 51, or the photographed learning environment screen is transmitted by the first photographing device 51 to the control device 52. It is generated by analysis by the control device 52. Attention information is the analysis of the target person in the learning environment screen, and the direction or area that most target personnel pay attention to is designated as the attention area. In step S205, the second photographing device 53 photographs the teaching screen associated with the attention area 55 in accordance with the control signal.

Please refer to FIG. 3 and FIG. 8 together. FIG. 8 is a flow chart of a digital teaching method according to another embodiment of the present invention. As shown in the figure, in step S401, the learning environment screen 59 is taken by the first photographing device 51 to the learning environment area 59. In step S403, the first photographing device 51 or the control device 52 analyzes the face size of the participant 591 in the learning environment screen, and in step S405, the participant's 591 face size is greater than the first threshold value in the learning environment screen. Set as the target person. In another embodiment, the participant 591 within the effective range of the direction or region of interest in the learning environment screen may also be set as the target person.

In step S407, analyzing the direction or region of interest of each target person in the learning environment screen, calculating the face turning angle of each target person or The direction of the eyeball's line of sight. In step S409, a direction or an area in which a plurality of target persons are concerned is determined, and in step S411, attention information is generated in a direction or region in which a plurality of target persons pay attention, and the attention area 55 is determined. Next, in step S413, the first photographing device 51 generates a control signal to the second photographing device 53 based on the attention information. The second photographing device 53 photographs the teaching screen associated with the attention area 55 in accordance with the control signal supplied from the first photographing device 51 in step S415.

Referring to FIG. 9, FIG. 9 is a flow chart for analyzing a direction or region of interest of each target person in a learning environment picture according to still another embodiment of the present invention. In still another embodiment of the present invention, analyzing and learning The method for the direction or region of the target person in the environment screen may be determined in step S601, and the face turn of each target person is calculated according to the angle of view correspondence table preset by the first photographing device 51 or the control device 52. The angle or the line of sight direction of the eyeball, and in step S605, the direction or region of interest of each target person is analyzed according to the calculation result of the face turning angle or the line of sight direction of the eyeball.

In summary, the present invention utilizes the first photographing device and the second photographing device to photograph the participants and the instructors, respectively. The learning environment image captured by the first photographing device analyzes the face turning angle of the participant in the learning environment screen or the line of sight direction of the eyeball, thereby generating a control signal to the second photographing device, so that the second photographing device is based on the control signal Automatically control the shooting towards the faculty or teaching area. In an embodiment of the invention, the second photographing device is further provided with a plurality of photographing regions, and the second photographing device is configured according to the photographing region where the attention region is located. The shooting area is photographed to produce a teaching screen. The invention utilizes the method of analyzing the steering angle of the face of most participants or the direction of the line of sight of the eyeball, so that the second photographic device can accurately track the content of the narrator, so as to achieve the purpose of automatically shooting the teaching content, reduce the human resources, and improve the video. Accuracy.

Although the present invention has been disclosed above in the above embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

10‧‧‧teaching classroom

11‧‧‧First camera

13‧‧‧Second photography device

15‧‧‧Attention area

17‧‧‧teaching area

171‧‧‧Blackboard

173‧‧‧teachers

19‧‧‧ study environment area

191‧‧‧teaching tables and chairs

193‧‧‧Participants

Claims (18)

A digital teaching system comprising: a first photographing device for photographing a learning environment image, and generating a control signal according to a attention information, the attention information corresponding to an attention area; and a second photographing device, Controlling the control signal to capture a teaching picture associated with the attention area; wherein the attention information is associated with a plurality of face steering angles or multiple eyeballs corresponding to the plurality of target persons in the learning environment picture The direction of the line of sight, and the direction or area of interest of the majority of the target persons whose proportion is greater than a proportional value is designated as the noted area. The digital teaching system of claim 1, further comprising: a control device configured to analyze a direction or an area of interest of each of the target personnel in the learning environment screen, to determine the majority of the target personnel The direction or area of interest to generate the attention information and determine the area of attention. The digital teaching system of claim 2, wherein the control device further calculates the face turning angle of each of the target persons or the line of sight direction of the eyeball, thereby analyzing the direction or region of interest of each of the target personnel. The digital teaching system of claim 3, wherein the target personnel are selected from a preset area of the learning environment screen, and the target personnel respectively have different coordinates. The digital teaching system of claim 4, wherein the control device is further provided with a plurality of viewing angle correspondence tables, and the control device calculates the facial steering angle or the eyeball of each of the target personnel according to the viewing angle correspondence tables. The direction of the line of sight is used to analyze the direction or area of interest of each of the target personnel, and the coordinates of each of the target personnel correspond to one of the viewing angle correspondence tables. The digital teaching system of claim 2, wherein the control device is further configured to analyze a face size of the plurality of participants in the learning environment picture, and the face size is greater than a first threshold value among the participants These participants are set as the target personnel. The digital teaching system of claim 2, wherein the control device is further configured to analyze each of the target persons within a valid range of the direction or region of interest in the learning environment picture, thereby generating the attention information, and According to the decision of the area of attention. The digital teaching system of claim 1, wherein the second photographing device is pre-configured with a plurality of adjacent photographing regions, and the second photographing device corresponds to when the photographed region is located in one of the photographing regions. The teaching picture is taken in this shooting area of the attention area. The digital teaching system of claim 8, wherein when the attention area is located between the two of the shooting areas, the second photographing device selects one of the adjacent ones of the shooting areas To shoot the teaching screen. A digital teaching method that includes: Shooting a learning environment picture by using a first photographing device; generating a control signal according to a attention information, the attention information corresponding to an attention area; and photographing, according to the control signal, a second photographing device associated with the received image a teaching screen of the attention area; wherein the attention information is associated with a plurality of facial turning angles or a plurality of eyeball viewing directions corresponding to the plurality of target persons in the learning environment screen; wherein the target personnel The direction or area in which the majority of the population is greater than a proportional value is designated as the noted area. The digital teaching method of claim 10, further comprising: analyzing a direction or an area of interest of each of the target personnel in the learning environment screen; determining a direction or an area of the target persons that the majority is interested in; The attention information is generated in a direction or region in which the majority of the target persons are concerned, and the attention area is determined. The digital teaching method of claim 11, wherein the step of analyzing the direction or region of the target person in the learning environment screen further comprises: calculating the face turning angle of each of the target personnel or The line of sight of the eye; and According to the calculation result of the face turning angle or the line of sight direction of the eyeball, the direction or region of interest of each target person is analyzed. The digital teaching method of claim 12, wherein the target personnel are selected from a preset area of the learning environment screen, and the target personnel respectively correspond to different coordinates. The digital teaching method of claim 13, in the step of analyzing each direction or region of interest of the target person in the learning environment screen, further comprising: calculating, according to the plurality of perspective correspondence tables, each of the target personnel a face turning angle or a line of sight direction of the eyeball; and analyzing a direction or an area of interest of each of the target personnel according to the calculation result of the face turning angle or the line of sight direction of the eyeball, and the coordinates of each of the target personnel are corresponding The angle of view corresponds to one of the tables. The digital teaching method of claim 11, further comprising: analyzing a face size of a plurality of participants in the learning environment picture; and participating in the participant's face size greater than a first threshold The personnel are set as the target personnel. The digital teaching method of claim 11, further comprising: analyzing each of the target persons within a valid range of the direction or region of interest in the learning environment screen; and the direction or region according to the focus within the valid range. Each of the eyes The analysis result of the target personnel generates the attention information and determines the attention area. The digital teaching method of claim 10, wherein in the step of photographing the teaching screen associated with the attention area by the second photographing apparatus, the second photographing apparatus is preliminarily provided with a plurality of adjacent photographing areas, When the attention area is located in one of the shooting areas, the teaching picture is taken in the shooting area corresponding to the attention area. The digital teaching method of claim 17, wherein when the attention area is located between the two of the shooting areas, one of the adjacent ones of the shooting areas is selected to capture the teaching Picture.