Intelligent education large screen system

Abstract

The application provides an intelligent education large-screen system. The intelligent education large-screen system comprises a display screen, a first camera group and a second camera group, the first camera group and the second camera group are arranged at the frame area; the first camera group comprises a first camera and a second camera, the second camera group comprises a third camera and a fourth camera, and the first camera group and the second camera group are arranged to collect images at different distance positions. The intelligent education large-screen system is used to solve the defects that the display screen cannot obtain clear images at a far position in the prior art, and realizes the effect that both far and near scenes can be clearly displayed on the display screen.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to an intelligent education large screen system. Background Technology

[0002] Setting up cameras on displays to capture images of people in front of the screen enhances human-screen interaction. For example, cameras on large educational screens to capture student images are a common feature in smart classrooms, primarily serving teaching interaction, learning analysis, and classroom management. Through technologies such as facial recognition, image recognition, and AI algorithms (e.g., attention detection models), real-time processing and analysis of student images are achieved. The data is typically linked to the educational platform to form a visualized teaching management interface. Currently, educational screens used in classrooms suffer from unclear images of students in the back rows when capturing images of students in their seats, affecting subsequent data processing and analysis and reducing the effectiveness of visualized teaching. Utility Model Content

[0003] This application provides an intelligent education large screen system to solve the shortcomings of existing technologies, such as the inability of displays to obtain clear images from distant locations, and to achieve the effect of clearly displaying both near and far scenes on the display screen.

[0004] According to an embodiment of the first aspect of this application, an intelligent education large screen system includes a display screen, a first camera group, and a second camera group, wherein the first camera group and the second camera group are disposed on the display screen.

[0005] The first camera group includes a first camera and a second camera, and the second camera group includes a third camera and a fourth camera. The first camera group and the second camera group are configured to capture images at different distances.

[0006] According to one embodiment of this application, the optical axes of the first camera and the second camera are symmetrically arranged along the vertical plane of the line connecting the first camera and the second camera.

[0007] Along the vertical plane connecting the third camera and the fourth camera, the optical axes of the third camera and the fourth camera are symmetrically arranged.

[0008] According to one embodiment of this application, the display screen includes a display area and a border area;

[0009] The angles between the mounting plane where the first camera is located, the mounting plane where the second camera is located, the mounting plane where the third camera is located, and the mounting plane where the fourth camera is located, and the plane where the display area is located are all within the range of 20° to 30°.

[0010] According to one embodiment of this application, the display screen includes a display area and a border area;

[0011] The second camera and the third camera are symmetrically arranged along the central axis of the display area, and / or the first camera and the fourth camera are symmetrically arranged along the central axis of the display area.

[0012] According to one embodiment of this application, the distance between the first camera and the second camera is 2 to 3 cm, the distance between the second camera and the third camera is 3 to 5 cm, and the distance between the third camera and the fourth camera is 2 to 3 cm.

[0013] According to one embodiment of this application, the first camera and the second camera are short-focal-length lenses with a focal length f≤60mm;

[0014] The third and fourth cameras are medium telephoto lenses with a focal length of 60 < f ≤ 100 mm.

[0015] According to one embodiment of this application, the horizontal field of view of the first camera is 80° to 90°, the horizontal field of view of the second camera is 80° to 90°, and the coverage areas of the horizontal field of view of the first camera and the second camera partially overlap, so as to achieve the stitching and fusion of close-up images;

[0016] The horizontal field of view of the third camera is 20° to 35°, and the horizontal field of view of the fourth camera is 20° to 35°. The horizontal field of view coverage of the third camera and the fourth camera partially overlap to achieve the stitching and fusion of distant images.

[0017] According to one embodiment of this application, the intelligent education large screen system further includes an audio module for sound pickup, the audio module being disposed on the display screen.

[0018] According to one embodiment of this application, the audio module includes a plurality of microphones, which are distributed on both sides of the first camera group and the second camera group along the length of the display screen.

[0019] According to one embodiment of this application, the intelligent education large screen system further includes a data processing module that is communicatively connected to the first camera group and the second camera group, the data processing module being used to process the data collected by the cameras.

[0020] The above-described one or more technical solutions in the embodiments of this application have at least one of the following technical effects:

[0021] The intelligent education screen system in this application includes two sets of cameras: a first camera group and a second camera group. Each camera group consists of two cameras, and the "2+2" camera arrangement captures both distant and close-up images, which are then stitched together to effectively improve the clarity of the captured distant images, thereby enhancing the overall display effect. When the intelligent education screen system is applied in teaching, it can effectively improve the clarity of images of students in the back rows of the classroom, enhancing teaching interaction and classroom management.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a structural schematic diagram (front view) of the intelligent education large screen system provided in this application.

[0025] Figure 2 This is a schematic diagram (top view) showing the positional relationship of the first, second, third, and fourth cameras provided in this application.

[0026] Figure label:

[0027] 1. First camera group; 11. First camera; 12. Second camera; 2. Second camera group; 21. Third camera; 22. Fourth camera; 3. Display screen; 31. Display area; 32. Bezel area; 4. Microphone. Detailed Implementation

[0028] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0029] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0031] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] While existing smart displays incorporate multiple cameras, the image clarity remains low, particularly for distant scenes. Each camera on a current smart display simultaneously captures both near and far-view images. To improve image clarity, current methods aim to maximize the quality of each individual camera (e.g., pixel count). However, even with this approach, the clarity of distant images acquired by each camera remains relatively low. Stitching together these low-resolution distant images from multiple cameras fails to significantly improve the overall clarity of the distant view. This method is costly and ineffective.

[0034] According to an embodiment of the first aspect of this application, a smart education large-screen system is provided, such as... Figure 1 and Figure 2 As shown, the intelligent education large screen system includes a display screen 3, a first camera group 1 and a second camera group 2, which are mounted on the display screen 3. The first camera group 1 includes a first camera 11 and a second camera 12, and the second camera group 2 includes a third camera 21 and a fourth camera 22. The first camera group 1 and the second camera group 2 are configured to capture images at different distances.

[0035] The first camera group 1 can be configured to capture images from nearby locations, such as within a 33m range of the display screen. The second camera group 2 can be configured to capture images from distant locations, such as within a 33m to 10m range of the display screen.

[0036] like Figure 1 The view shown is a front view, with the first camera 11, the second camera 12, the third camera 21, and the fourth camera 22 located on the same horizontal plane.

[0037] The display area 31 of the display screen 3 is used to display images, and the border area 32 of the display screen 3 can be used to set up a camera, audio module, etc.

[0038] In practical applications, considering the installation height of the display screen 3, especially in classrooms, the first camera group 1 and the second camera group 2 can be positioned at the upper part of the frame area 32, such as... Figure 1 As shown, this is to ensure that the camera is positioned at a suitable height, allowing it to capture images over a wider area and avoid being obstructed.

[0039] The intelligent education screen system in this application includes two sets of cameras: a first camera group 1 and a second camera group 2. Each set includes two cameras, and the "2+2" camera arrangement captures both distant and close-up images, which are then stitched together. This effectively improves the clarity of the captured distant images, thereby enhancing the overall display effect. When the intelligent education screen system is applied in teaching, it effectively improves the clarity of images of students in the back rows of the classroom, enhancing teaching interaction and classroom management. Compared with existing technologies, this application dedicates one set of cameras to acquiring distant images, rather than each camera capturing both distant and close-up images. For example, the third camera 21 and the fourth camera 22 simultaneously acquire distant images (i.e., the third camera 21 and the fourth camera 22 do not acquire close-up images). When dedicated to acquiring distant images, a more targeted camera can be selected. This approach is not only lower in cost but also effectively improves the clarity of distant images without significantly affecting close-up images.

[0040] It should be noted that the number of cameras in the first camera group 1 and the second camera group 2 can be further increased, and is not limited to the "2+2" form. For example, the first camera group 1 may include three cameras, and the second camera group 2 may include two cameras, forming a "3+2" form; or, the first camera group 1 may include three cameras, and the second camera group 2 may include three cameras, forming a "3+3" form. Adjustments can be made to the hardware connected to the cameras in the intelligent education large screen system, which will not be elaborated here.

[0041] According to one embodiment of this application, such as Figure 2 As shown, along the perpendicular plane connecting the first camera 11 and the second camera 12, the optical axis O1 of the first camera 11 and the optical axis O2 of the second camera 12 are symmetrically arranged; along the perpendicular plane connecting the third camera 21 and the fourth camera 22, the optical axis O3 of the third camera 21 and the optical axis O4 of the fourth camera 22 are symmetrically arranged. The optical axis is the axis perpendicular to the lens of the camera and passing through the center point of the lens.

[0042] The optical axes of the first camera 11 and the second camera 12 are symmetrically arranged, meaning their installation angles are symmetrical, to capture images from both sides within the near-field range and avoid incomplete image capture on one side. Similarly, the optical axes of the third camera 21 and the fourth camera 22 are symmetrically arranged to capture images from both sides within the far-field range and avoid incomplete image capture on one side.

[0043] For example, the display screen 3 in this application includes a display area 31 and a border area 32, and the first camera group 1 and the second camera group 2 are disposed in the border area 32; of course, in some cases, the display screen 3 may be in the form of a full screen.

[0044] According to one embodiment of this application, such as Figure 2 As shown, the angle θ1 between the mounting plane of the first camera 11 and the plane of the display area 31 is 20° to 30°; the angle θ2 between the mounting plane of the second camera 12 and the plane of the display area 31 is 20° to 30°; the angle θ3 between the mounting plane of the third camera 21 and the plane of the display area 31 is 20° to 30°; and the angle θ4 between the mounting plane of the fourth camera 22 and the plane of the display area 31 is 20° to 30°.

[0045] Taking an angle of 20° as an example, the mounting planes of the first camera 11 and the second camera 12 form a V-shape with an included angle of 140°. The mounting planes of the third camera 21 and the fourth camera 22 also form a V-shape with an included angle of 140°.

[0046] Of course, the above angles can be adjusted according to the actual space conditions, and the included angles in the first camera group 1 and the second camera group 2 can be set to different values.

[0047] According to one embodiment of this application, such as Figure 1 As shown, the second camera 12 and the third camera 21 are symmetrically arranged along the central axis L1 of the display area 31, and / or the first camera 11 and the fourth camera 22 are symmetrically arranged along the central axis L1 of the display area 31. In practice, the central axis of the display area 31 can also be an entire plane, with the second camera 12 and the third camera 21 symmetrically arranged along this plane, and the first camera 11 and the fourth camera 22 symmetrically arranged along this plane.

[0048] The first camera 11 and the second camera 12 can be set on the left side of the central axis, and the third camera 21 and the fourth camera 22 can be set on the right side of the central axis. The first camera 11 and the fourth camera 22 are symmetrically set along the central axis of the display area 31, and the second camera 12 and the third camera 21 are symmetrically set along the central axis of the display area 31. The symmetrical setting improves the overall aesthetics of the display screen and can take into account the image acquisition situation on both sides of the classroom (or other installation locations of the intelligent education screen system), so that the intelligent education screen system can capture complete images in the classroom.

[0049] Of course, when the smart education screen system needs to be installed in a special scenario, such as when the smart education screen system itself cannot be centered in front of the room, but needs to be installed in the left or right front, the position of the camera in the smart education screen system can be customized according to the specific installation location, so that the first camera group 1 and the second camera group 2 are not symmetrical along the central axis of the display area 31, so as to achieve better image acquisition effect in special scenarios.

[0050] According to one embodiment of this application, such as Figure 2 As shown, the distance S1 between the first camera 11 and the second camera 12 is 2 to 3 cm, the distance S2 between the second camera 12 and the third camera 21 is 3 to 5 cm, and the distance S3 between the third camera 21 and the fourth camera 22 is 2 to 3 cm. The distance between the cameras here can be the distance between the center positions of two adjacent cameras.

[0051] By adjusting the distance between the cameras, high-definition images can be captured specifically for classrooms of different sizes. For example, the distance between the cameras can be increased as needed to enhance the parallax contrast of distant objects, improve the depth detection accuracy and ranging capability of distant targets, and is suitable for classrooms with larger dimensions.

[0052] According to one embodiment of this application, the first camera 11 and the second camera 12 are short-focal-length lenses with a focal length f≤60mm, used to image objects within 3m of the front end of the lens; the third camera 21 and the fourth camera 22 are medium-focal-length lenses with a focal length 60<f≤100mm, used to image objects within 3 to 10m of the front end of the lens.

[0053] The first camera 11 and the second camera 12 in the first camera group 1 are used to capture close-up images. Their capture range can be objects within 3m of the front of the lens. The focal length of the first camera 11 and the second camera 12 can be f≤60mm, and the specific value can be adjusted according to the actual situation (e.g., classroom size).

[0054] The third camera 21 and the fourth camera 22 in the second camera group 2 are used to capture distant images. Their capture range can be objects within 3 to 10 meters in front of the lens. The focal length of the third camera 21 and the fourth camera 22 can be 60 < f ≤ 100 mm, and the specific value can be adjusted according to the actual situation (such as the size of the classroom).

[0055] According to one embodiment of this application, the horizontal field of view of the first camera 11 is 80° to 90°, the horizontal field of view of the second camera 12 is 80° to 90°, and the coverage areas of the horizontal field of view of the first camera 11 and the second camera 12 partially overlap to achieve close-up image stitching and fusion; the horizontal field of view of the third camera 21 is 20° to 35°, the horizontal field of view of the fourth camera 22 is 20° to 35°, and the coverage areas of the horizontal field of view of the third camera 21 and the fourth camera 22 partially overlap to achieve distant image stitching and fusion, which can clearly capture classroom images within a 9m×10m area. Compared with existing cameras, a larger horizontal field of view can be achieved, reaching over 160°, achieving full coverage of the classroom space; the two sets of cameras for near and distant views can output two video streams, and the two data streams can be quickly switched according to the actual scene to ensure that both the front and back images of the classroom are clearly visible. At the same time, combined with the large screen 16-microphone 4-array sound pickup system (i.e., the subsequent audio module), it integrates visual and auditory multimodal data to perform multimodal interaction, improve the collaborative processing capability of picture and sound, locate the speaking position, and enhance the human voice.

[0056] In the foreground, 80° to 90° is considered a wide-angle shot, covering a large area. The horizontal field of view of the first camera 11 and the second camera 12 partially overlap to expand the foreground field of view. This overlap also allows for more accurate alignment during stitching, reducing blind spots. When acquiring images of students in a classroom, the foreground needs to clearly show the surrounding environment. Wide-angle stitching can cover a larger area, and the overlapping portion helps the algorithm fuse the images, resulting in a more coherent picture.

[0057] Dual lenses capture images of the same area, and image quality can be optimized through algorithm fusion, such as reducing noise and balancing exposure. Even in complex lighting environments (such as indoor lighting with varying brightness), clear and complete image output can still be guaranteed.

[0058] In the distant view, a field of view of 20° to 35° is considered a medium-telephoto narrow field of view, which is suitable for capturing distant details (such as images of students in the distance inside a classroom). However, the coverage of a single lens is limited. By overlapping and stitching two lenses, the monitoring range of distant views can be appropriately expanded while ensuring details, thus avoiding the shortcomings of a single telephoto lens having too narrow a field of view.

[0059] In long-range image acquisition, dual-lens stitching can reduce the "blind spots" problem caused by the limited field of view of a single lens. At the same time, algorithm fusion optimizes the brightness and color consistency of long-range images, improving the recognition effect under complex lighting conditions (such as backlight and dusk).

[0060] According to one embodiment of this application, such as Figure 1 As shown, the intelligent education large-screen system also includes an audio module for sound pickup, which is located on the display screen 3. For example, the audio module can be located in the border area 32.

[0061] The audio module is used to collect sound from inside the classroom.

[0062] According to one embodiment of this application, such as Figure 1 As shown, the audio module includes multiple microphones 4, which are distributed on both sides of the first camera group 1 and the second camera group 2 along the length of the display screen.

[0063] The bezel area 32 of the display screen 3 includes four positions: top, bottom, left, and right. The first camera group 1 and the second camera group 2 are both located in the upper position, and multiple microphones 4 are also located in the upper position of the bezel area 32. The number of microphones 4 can be 16, with 8 microphones 4 located on the left side of the first camera group 1 and the remaining 8 microphones 4 located on the right side of the second camera group 12.

[0064] Of course, in some cases, the microphone 4 can also be positioned on the left or right sides or at the bottom of the border area 32 as needed.

[0065] In practical applications, microphone 4 and camera processing algorithms can be integrated into the large-screen platform system, not limited to SOCs with NPU computing units such as RK3576 and RK3588, eliminating the need for a dedicated audio and video algorithm processing board and achieving overall cost reduction design.

[0066] The following are examples illustrating three application methods of the intelligent education large-screen system provided in this application:

[0067] Scenario 1: A 2+2 camera system captures images of students and teachers in the classroom. Faces must have a resolution of 100x100 pixels or higher. The captured data is transmitted to a classroom behavior analysis system, which can analyze data including student behavior, faces, and eye movements. For example, it analyzes student behaviors such as tapping on desks or whispering, combining facial and eye data to deeply analyze student attention levels and key points of focus. The system also identifies the location of students interacting with the teacher through cameras, outputting location data from a 4-microphone array system for precise sound source localization. This enhances sound pickup intensity and quality in that area, greatly improving the accuracy of classroom audio and video analysis for speech-to-text applications.

[0068] Scenario 2: Currently, K-12 (primary, middle, and high school) teachers' activity areas are generally near the front of the classroom. This is mainly because current interactive teaching operations primarily rely on physical contact and touch writing, which, being far from the teaching terminal, affects teaching efficiency. By using 2+2 cameras and multi-modal directional audio enhancement technology, the quality of filming and audio pickup from the back row can be improved, thereby increasing the teacher's range of movement within the classroom and enhancing teaching interactivity. For example, when a teacher moves to the back row, specific gestures can be recognized by the large screen, which will then send specific commands to perform operations such as playing, pausing, turning pages, and accessing annotations in a PPT presentation. These common teaching operations can be handled through air gestures, without relying on physical contact.

[0069] Scenario 3: Remote centralized control and classroom monitoring application. The large-screen camera outputs two data streams: one ensuring clarity for the front of the classroom and the other for the rear. When focusing on a specific area, clicking or zooming in on that area automatically switches to high-definition quality based on pre-defined classroom area coordinates, ensuring optimal viewing. This eliminates the need for school or grade-level teaching administrators to enter every classroom for inspections, avoiding distractions and ensuring effective teaching. Monitoring personnel can directly observe the classroom's teaching situation in real-time through the data stream.

[0070] The intelligent educational large-screen system provided in this application can be applied in the field of educational informatization technology. As an intelligent educational large-screen system integrating a dual-focal-length camera array and a multimodal data fusion algorithm, it achieves full spatial coverage through the collaborative layout of dual-focal-length cameras (telephoto + short-focal-length), and integrates visual and auditory multimodal data to improve the collaborative processing capabilities of images and sound. It solves the problem that traditional educational large screens cannot clearly capture images of students in the back rows and cannot meet the needs of long-distance gesture interaction. Simultaneously, by combining multimodal fusion technology of sound and vision, it improves the recording quality of teaching audio.

[0071] According to one embodiment of this application, the intelligent education large screen system further includes a data processing module (not shown in the figure) that is communicatively connected to the first camera group 1 and the second camera group 2. The data processing module is used to process the data collected by the cameras.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application and should be covered within the scope of the claims of this application.

Claims

1. An intelligent educational large-screen system, characterized in that, It includes a display screen (3), a first camera group (1), and a second camera group (2), wherein the first camera group (1) and the second camera group (2) are disposed on the display screen (3); The first camera group (1) includes a first camera (11) and a second camera (12), and the second camera group (2) includes a third camera (21) and a fourth camera (22). The first camera group (1) and the second camera group (2) are configured to capture images at different distances.

2. The intelligent education large screen system according to claim 1, characterized in that, Along the vertical plane connecting the first camera (11) and the second camera (12), the optical axes of the first camera (11) and the second camera (12) are symmetrically arranged; Along the midline of the line connecting the third camera (21) and the fourth camera (22), the optical axes of the third camera (21) and the fourth camera (22) are symmetrically arranged.

3. The intelligent education large screen system according to claim 2, characterized in that, The display screen includes a display area (31) and a border area (32); The angles between the mounting plane where the first camera (11) is located, the mounting plane where the second camera (12) is located, the mounting plane where the third camera (21) is located, and the mounting plane where the fourth camera (22) is located, and the plane where the display area (31) is located are all within the range of 20° to 30°.

4. The intelligent education large screen system according to claim 1, characterized in that, The display screen includes a display area (31) and a border area (32); The second camera (12) and the third camera (21) are symmetrically arranged along the central axis of the display area (31), and / or the first camera (11) and the fourth camera (22) are symmetrically arranged along the central axis of the display area (31).

5. The intelligent education large screen system according to claim 1, characterized in that, The distance between the first camera (11) and the second camera (12) is 2 to 3 cm, the distance between the second camera (12) and the third camera (21) is 3 to 5 cm, and the distance between the third camera (21) and the fourth camera (22) is 2 to 3 cm.

6. The intelligent education large-screen system according to any one of claims 1 to 5, characterized in that, The first camera (11) and the second camera (12) are short-focal-length lenses with a focal length f≤60mm; The third camera (21) and the fourth camera (22) are medium telephoto lenses with a focal length of 60 < f ≤ 100 mm.

7. The intelligent education large screen system according to any one of claims 1 to 5, characterized in that, The horizontal field of view of the first camera (11) is 80° to 90°, the horizontal field of view of the second camera (12) is 80° to 90°, and the horizontal field of view coverage of the first camera (11) and the second camera (12) partially overlap to achieve the stitching and fusion of close-up images; The horizontal field of view of the third camera (21) is 20° to 35°, and the horizontal field of view of the fourth camera (22) is 20° to 35°. The horizontal field of view coverage of the third camera (21) and the fourth camera (22) partially overlap to achieve the stitching and fusion of distant images.

8. The intelligent education large-screen system according to any one of claims 1 to 5, characterized in that, It also includes an audio module for sound pickup, which is mounted on the display screen (3).

9. The intelligent education large screen system according to claim 8, characterized in that, The audio module includes multiple microphones (4), which are distributed on both sides of the first camera group (1) and the second camera group (2) along the length of the display screen (3).

10. The intelligent education large-screen system according to any one of claims 1 to 5, characterized in that, It also includes a data processing module that is communicatively connected to the first camera group (1) and the second camera group (2), the data processing module being used to process the data collected by the cameras.

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