Homework correcting machine, homework correcting and projection method, homework correcting and projection device, homework correcting and projection equipment and medium

Abstract

The invention discloses a homework correcting machine, a homework correcting and projection method, homework correcting and projection equipment and a storage medium, and the homework correcting machine comprises a camera which is used for shooting a target image containing a to-be-corrected target homework; the main control board is used for correcting the target job in the target image to obtain a correction result of the target job; the projection light machine is used for projecting the correction result of the target homework to the test paper corresponding to the target homework; the universal serial bus interface is used for connecting a charging adapter, developing and debugging and connecting external equipment; and the battery is used for supplying power to the homework correcting machine, so that a larger projection range and a larger photographing range can be realized by utilizing the rotatable camera and the projection light machine which are arranged on the homework correcting machine, the correcting and projection effects of the homework correcting machine are further improved, and the homework correcting experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the field of computer technology, and in particular to a homework grading machine and a homework grading and projection method, device, equipment and medium. Background Art

[0002] Currently, teachers often need to spend a lot of time and energy when correcting students' homework. Currently, the machines with homework correction functions are mostly based on mobile phones or tablet products. Manually place the homework under the camera and click to take a photo for correction. This is inefficient and has great limitations. In addition, with the rapid development of informatization, how to quickly and accurately correct homework is particularly important in the field of teaching assistance.

[0003] At present, in order to improve the efficiency of grading, the grading method commonly used when grading homework is to use an intelligent projection desk lamp for grading. Specifically, the homework is placed under the upper projection desk lamp, and the homework is graded through the internal software. The intelligent projection desk lamp used in this method is large in size and inconvenient to carry. The area for placing homework is small, the size limit is large, and it does not have a battery and must be connected to a power adapter for use. In addition, the operation requires the use of a specific stylus pen and cannot be rotated. It is impossible to connect general peripherals such as a mouse and keyboard, which is inconvenient to operate. Therefore, the existing intelligent projection desk lamp and other homework grading equipment cannot achieve the ideal grading effect. Summary of the invention

[0004] The main purpose of the embodiments of the present application is to provide a homework grading machine and a homework grading and projection method, device and storage medium, which can utilize the rotatable camera and projection optical machine installed on the homework grading machine to achieve a larger projection range and photo range, thereby improving the grading and projection effects of the homework grading machine, and further improving the user's homework grading experience.

[0005] In a first aspect, an embodiment of the present application provides a homework grading machine, the homework grading machine comprising: a camera, a projection optical machine, a universal serial bus interface, and a main control board;

[0006] The camera is used to capture a target image; the target image is an image containing the target homework to be corrected;

[0007] The main control board is used to perform correction processing on the target job in the target image to obtain a correction result for the target job;

[0008] The projection optical machine is used to project the correction result of the target assignment onto the test paper corresponding to the target assignment;

[0009] The universal serial bus interface is used for connecting a charging adapter, development and debugging, and for connecting external devices.

[0010] In a possible implementation, the homework grading machine further includes: an antenna, an audio module, and a rotation module;

[0011] The antenna is used to connect to the network;

[0012] The audio module is used to implement the audio interaction function of the homework grading machine;

[0013] The rotating module is used to adjust the direction and angle of the projection light machine to achieve the correction and projection of the target operation beyond the original projection range.

[0014] In a possible implementation, the main control board includes: a CPU chip, a power management chip, a WIFI module and / or a Bluetooth module;

[0015] The power management chip is used to manage the charging and discharging of the device;

[0016] The WIFI module is used to connect to the network;

[0017] And / or the Bluetooth module is used to connect to a Bluetooth device.

[0018] In a second aspect, an embodiment of the present application provides a homework grading and projection method, the method adopts the homework grading machine as described in the first aspect above, and the method includes:

[0019] Taking a target image by a camera; the target image is an image containing the target homework to be corrected;

[0020] Performing a correction process on the target job in the target image to obtain a correction result for the target job;

[0021] The correction result of the target assignment is projected onto the test paper corresponding to the target assignment through a projection optical machine; and when it is detected that the target assignment is beyond the projection range, the direction and position of the projection optical machine are adjusted according to the position of the target assignment so that the target assignment is completely within the projection range.

[0022] In a possible implementation, before photographing the target image with a camera, the method further includes:

[0023] The homework grading machine is started, and the projection light machine is controlled to project the main interface of the display device, and the projection light machine is controlled to rotate to an initial fixed position.

[0024] In a possible implementation, the step of capturing the target image by using a camera includes:

[0025] In response to a preset photographing instruction made by the user, a target image is photographed through the camera.

[0026] In a possible implementation, before projecting the correction result of the target assignment onto the test paper corresponding to the target assignment by means of a projection optical machine, the method further includes:

[0027] It is beneficial for the image processing algorithm to process the target image to determine the position information of the target assignment, so that according to the position information of the target assignment, the correction result of the target assignment can be projected onto the test paper corresponding to the target assignment through a projection optical machine; the test paper is used by the teacher to annotate the target assignment according to the projected correction result, explain the target assignment to students or prepare lessons.

[0028] In a third aspect, the present application also provides a homework grading and projection device, including:

[0029] A shooting unit, used for shooting a target image through a camera; the target image is an image containing a target job to be corrected;

[0030] A correction unit, used for performing correction processing on the target job in the target image to obtain a correction result of the target job;

[0031] The projection unit is used to project the correction result of the target assignment onto the test paper corresponding to the target assignment through a projection optical machine; and when it is detected that the target assignment is beyond the projection range, the direction and position of the projection optical machine are adjusted according to the position of the target assignment, so that the target assignment is completely within the projection range.

[0032] In a possible implementation manner, the device further includes:

[0033] The control unit is used to start the homework grading machine, control the main interface of the super-shadow light machine projection display device, and control the projection light machine to rotate to an initial fixed position.

[0034] In a possible implementation, the photographing unit is specifically used for:

[0035] In response to a preset photo taking instruction made by the user, a target image is photographed through the camera.

[0036] In a possible implementation manner, the device further includes:

[0037] A determination unit is used to facilitate an image processing algorithm to process the target image to determine the position information of a target assignment, so that according to the position information of the target assignment, a correction result of the target assignment is projected onto a test paper corresponding to the target assignment through a projection optical machine. The test paper is used by the teacher to annotate the target assignment according to the projected correction result, explain the target assignment to students, or prepare lessons.

[0038] In a fourth aspect, an embodiment of the present application further provides a homework grading and projection device, including: a processor, a memory, and a system bus;

[0039] The processor and the memory are connected via the system bus;

[0040] The memory is used to store one or more programs, and the one or more programs include instructions. When the instructions are executed by the processor, the processor executes any one of the implementations of the homework correction and projection method described in the second aspect.

[0041] In a fifth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein instructions are stored in the computer-readable storage medium. When the instructions are executed on a terminal device, the terminal device executes any one of the implementation methods of the homework grading and projection method described in the second aspect above.

[0042] In a sixth aspect, an embodiment of the present application further provides a computer program product, which, when executed on a terminal device, enables the terminal device to execute any one of the implementations of the homework grading and projection method described in the second aspect above.

[0043] The embodiments of the present application provide a homework grading machine and a homework grading and projection method, device, equipment and medium, wherein the homework grading machine includes: a camera, a projection optical machine, a universal serial bus interface, and a main control board; the camera is used to capture a target image; wherein the target image is an image containing a target homework to be graded; the main control board is used to grade the target homework in the target image to obtain a grading result of the target homework; the projection optical machine is used to project the grading result of the target homework onto a test paper corresponding to the target homework; the universal serial bus interface is used to connect a charging adapter, development and debugging, and to connect external devices.

[0044] It can be seen that since the homework grading machine constructed in the present application combines a camera and a projector to achieve a larger projection range and photo range, not only is the device smaller and more portable, it can also adapt to target homework papers of different sizes or thicknesses, making it convenient to correct the target homework, and it can also be connected to external devices through a universal serial bus interface for easy operation, thereby improving the grading and projection effects of the homework grading machine, thereby enhancing the user's homework grading experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 A structural diagram of a homework grading machine provided in an embodiment of the present application;

[0047] Figure 2 A flowchart of a homework correction and projection method provided in an embodiment of the present application;

[0048] Figure 3 A schematic diagram of the overall process of homework correction and projection provided in an embodiment of the present application;

[0049] Figure 4 A schematic diagram of a process of correcting a target job in a target image to obtain a correction result for the target job provided by an embodiment of the present application;

[0050] Figure 5 This is an example diagram of the ultra-clear camera shooting effect provided in the embodiment of the present application;

[0051] Figure 6 A schematic diagram of a process of projecting the grading result of a target assignment onto a test paper corresponding to the target assignment by an ultra-short-throw projection optical machine provided in an embodiment of the present application;

[0052] Figure 7 A schematic diagram of the composition of a homework marking and projection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] At present, there are two main methods for grading homework: one is the traditional manual grading method, in which teachers grade the homework one by one. This method requires a lot of manpower and time, with low efficiency and high cost; the other is to rely on homework machines to grade homework. Although this method can save teachers' grading time to a certain extent, the existing method of grading homework by relying on homework machines usually uses intelligent projection desk lamps for grading, specifically placing the homework under the upper projection desk lamp, and grading the homework through internal software. The intelligent projection desk lamp used in this method is large in size and inconvenient to carry. The area for placing homework is small, the size limit is large, and it does not have a battery and must be connected to a power adapter for use. In addition, a specific stylus pen is required for operation and cannot be rotated. It is impossible to connect general peripherals such as a mouse and keyboard, which is inconvenient to operate. Therefore, the existing homework grading equipment such as intelligent projection desk lamps cannot achieve the ideal grading effect.

[0054] To solve the above-mentioned defects, the present application provides a homework grading machine, including a camera, a projection optical machine, a universal serial bus interface, and a main control board; wherein the camera is used to capture a target image; the target image is an image containing a target homework to be graded; the main control board is used to grade the target homework in the target image to obtain a grading result of the target homework; the projection optical machine is used to project the grading result of the target homework onto a test paper corresponding to the target homework; the universal serial bus interface is used to connect a charging adapter, development and debugging, and to connect external devices.

[0055] It can be seen that since the homework grading machine constructed in the present application combines a camera and a projector to achieve a larger projection range and photo range, not only is the device smaller and more portable, it can also adapt to target homework papers of different sizes or thicknesses, making it convenient to correct the target homework, and it can also be connected to external devices through a universal serial bus interface for easy operation, thereby improving the grading and projection effects of the homework grading machine, thereby enhancing the user's homework grading experience.

[0056] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] First embodiment

[0058] See also Figure 1 , is a structural diagram of a homework grading machine provided in this embodiment. The homework grading machine 100 specifically includes: a camera 101, a projection optical machine 102, a universal serial bus interface (USB interface) 104, and a main control board 105.

[0059] Camera 101, used to shoot Figure 1 The image of the target homework in front of the homework grading machine shown is used as the target image. In practical applications, in order to achieve a larger shooting range, the camera 101 can be selected as an ultra-clear wide-angle rotatable camera with a free-form surface lens. In this way, the target homework can be placed in a wider position and angle, and it is no longer necessary to extend it to the top of the homework. The free-form surface lens can be used to shoot a horizontal picture when the ultra-clear camera is tilted to shoot the desktop, so as to facilitate the subsequent more accurate correction of the target homework.

[0060] Among them, the position of the camera 101 (such as an ultra-high-definition camera) in the homework grading machine 100 is not limited and can be set according to actual conditions and experience values. For example, it can be installed above the projection light machine 102, etc., and connected to the main control board 105 through a flexible printed circuit (FPC) cable to transmit control signals, data signals and power, etc.

[0061] The main control board 105 is used to perform correction processing on the target job in the target image captured by the camera 101 to obtain a correction result for the target job.

[0062] It should be noted that, in a possible implementation of this embodiment, the main control board 105 may include but is not limited to a CPU chip, a power management chip, a USB interface, a WIFI module and / or a Bluetooth module, etc., and is also connected to external devices via an FPC cable. Figure 1 The Type-C interface in the main control board 105 is used to connect the adapter, the input power is connected to the power management chip, and the power management chip is connected to the battery 103 through the FPC cable to charge the battery 103. The WIFI module is used to connect to the network. The Bluetooth module is used to connect Bluetooth devices (such as Bluetooth headsets, etc.). It should be noted that the specific function implementation process of the main control board 105 can be found in the detailed introduction in the subsequent second embodiment, in which the signal processing module is introduced as the main control board 105 (or the CPU chip contained therein) to elaborate on its implementation function.

[0063] The projection optical machine 102 is used to project the correction result of the target homework determined by the main control board 105 onto the test paper corresponding to the target homework. In practical applications, the projection optical machine 102 can be selected as an ultra-short-throw projection optical machine. In this way, the use of the ultra-short-throw projection optical machine can greatly reduce the size of the projector in the homework correction machine, and can achieve large-scale projection on a plane that is short from the lens. Combined with the camera 101 (specifically, it can be a free-form surface lens of an ultra-clear camera), a horizontal picture can be taken when the camera is tilted to shoot the desktop. The rotation of the projection optical machine 102 (such as an ultra-short-throw projection optical machine) and the camera 101 (such as an ultra-clear camera) achieves a larger projection and shooting range.

[0064] Among them, the position of the projection light machine 102 (such as an ultra-short-throw projection light machine) in the homework grading machine 100 is not limited and can be set according to actual conditions and experience values. It is also connected to the main control board 105 through an FPC cable to transmit control signals, data signals, power, etc.

[0065] Universal Serial Bus interface (USB interface) 104, used to connect a charging adapter (such as Figure 1 Type-C interface in), development and debugging (such as Figure 1 Type-A interface in the system), and for connecting external devices (such as keyboard, mouse, etc.).

[0066] Among them, the position of the projection light machine 102 (such as an ultra-short-throw projection light machine) in the homework grading machine 100 is not limited and can be set according to actual conditions and experience values. It is also connected to the main control board 105 through an FPC cable to transmit control signals, data signals, power, etc.

[0067] In addition, an optional implementation method is that the homework grading machine 100 may also include: a battery 103, an antenna 106, an audio module 107, and a rotation module 108. Among them, the battery 103 is used to power the entire homework grading machine 100, and the specific power supply method is not limited. For example, the various power supplies required by each device can be obtained through the DCDC (direct current-to-direct current converter chip) and the low dropout linear regulator (LowDropout Regulator, LDO) chip on the main control board 105. The antenna 106 is used to connect to the network. The audio module 107 is used to realize the audio interaction function of the homework grading machine 100, which can be but not limited to a microphone and a speaker. The rotation module 108 is used to adjust the direction and angle of the projection optical machine 102 (such as an ultra-short-throw projection optical machine) to achieve the correction and projection of the target homework beyond the original projection range.

[0068] so, Figure 1 Compared with existing intelligent projection desk lamps and other homework grading devices that are large and not battery-powered, the homework grading machine 100 shown not only uses free-form lens and ultra-short-focus projection to make the overall size of the device smaller. Battery power is added, which is convenient to carry and can be used for projection display in various scenes, such as explanation of wrong questions in homework, learning video broadcast, automatic correction of homework, etc. It is also possible to connect peripherals such as mouse and keyboard through the USB interface, which is more convenient to operate. At the same time, due to the wide-angle ultra-clear camera with a free-form lens, the target homework to be corrected can be placed in a wider position and angle, and it is no longer necessary to extend directly above the homework, which greatly reduces the size of the homework grading machine 100 device itself. The rotatable camera and projection light machine realize a larger projection range and photo range. The AI ​​recognition algorithm carried in the main control board 105 can automatically identify the homework to realize the fully automatic homework grading function.

[0069] In summary, the present embodiment provides a homework grading machine, including a camera, a projection optical machine, a universal serial bus interface, and a main control board; wherein the camera is used to capture a target image; the target image is an image containing a target homework to be graded; the main control board is used to grade the target homework in the target image to obtain a grading result of the target homework; the projection optical machine is used to project the grading result of the target homework onto a test paper corresponding to the target homework; the universal serial bus interface is used to connect a charging adapter, development and debugging, and to connect external devices.

[0070] It can be seen that since the homework grading machine constructed in the present application combines a camera and a projector to achieve a larger projection range and photo range, not only is the device smaller and more portable, it can also adapt to target homework papers of different sizes or thicknesses, making it convenient to correct the target homework, and it can also be connected to external devices through a universal serial bus interface for easy operation, thereby improving the grading and projection effects of the homework grading machine, thereby enhancing the user's homework grading experience.

[0071] Second embodiment

[0072] The present application embodiment provides a method for performing homework grading and projection using the homework grading machine in the first embodiment, see Figure 2 , is a flow chart of a homework correction and projection method provided in this embodiment, which can be applied to Figure 3 The signal processing module shown (which can be understood as the main control board 105 (or the CPU chip contained therein) mentioned in the first embodiment, etc.) specifically includes the following steps:

[0073] S201: photographing a target image through a camera; wherein the target image is an image containing a target homework to be corrected.

[0074] In this embodiment, any image processed by this embodiment is defined as a target image, and the homework to be corrected contained in the target image is defined as a target homework. It should be noted that this embodiment does not limit the type of the target image. For example, the target image can be a color image composed of the three primary colors of red (R), green (G), and blue (B), or it can be a grayscale image, etc.

[0075] In addition, in order to improve the grading and projection effects of the target assignments, so as to further enhance the user's assignment grading experience, first, the battery can be used to power the entire assignment grading machine system (for long-term operation, an adapter can be plugged in to power the entire assignment grading machine system), start the assignment grading machine, and then, the signal processing module can control the main interface of the optical projection display device through control signals such as MIPI and SPI, and the signal processing module can also control the motor of the rotating device through signals such as GPIO and PWM to initialize, and rotate the projection optical machine (such as an ultra-short-throw projection optical machine) to the initial fixed position.

[0076] At the same time, the signal processing module can also open its installed AI homework grading software and camera (such as an ultra-clear camera) to connect to the camera (such as an ultra-clear camera) through the MIPI signal to obtain image information. In this way, when the user places the target homework in front of the homework grading machine and makes a preset photo-taking instruction (the specific instruction content is not limited), such as when the user poses a preset photo-taking action (such as a preset photo-taking gesture, etc.) or displays preset text content, or makes a preset voice in front of the camera, the signal processing module CPU receives the preset photo-taking instruction (such as recognizing the photo-taking gesture), and in response to the preset photo-taking instruction made by the user, it can send a shooting signal to the camera through the I2C interface to take a photo, so as to capture the target image through the camera, and transmit the captured target image to the signal processing module.

[0077] S202: Correcting the target job in the target image to obtain a correction result for the target job.

[0078] In this embodiment, after the target image containing the target job to be corrected is captured by a camera (such as an ultra-high-definition camera) in step S201, the target job in the target image can be further corrected by AI job correction software, and the correction result and image number can be saved in the storage chip of the device (such as an EMMC chip) through the SDIO interface to execute the subsequent step S203.

[0079] S203: Projecting the grading result of the target assignment onto the test paper corresponding to the target assignment through a projection optical machine; and when detecting that the target assignment is beyond the projection range, adjusting the direction and position of the projection optical machine according to the position of the target assignment, so that the target assignment is completely within the projection range.

[0080] In this embodiment, while obtaining the grading result for the target assignment through step S202, the target image can also be processed by existing or future image processing algorithms to determine the location information of the target assignment, so that the grading result of the target assignment can be projected onto the test paper corresponding to the target assignment through a projection optical machine (such as an ultra-short-focus projection optical machine) according to the location information of the target assignment, corresponding one to one with the text content of the target assignment. In this way, the test paper can be used for teachers to annotate the target assignment according to the projected grading result, such as quickly circling wrong questions, evaluations, etc. on the target assignment, and adding comments before issuing it to students, or teachers can also explain the target assignment to students based on the grading result projected on the test paper, or teachers can prepare lessons based on the grading result projected on the test paper in combination with the students' wrong questions. When it is detected that the target assignment is beyond the projection range, the rotation of the rotary motor can be automatically controlled according to the position of the target assignment to adjust the direction and position of the projection light machine (such as an ultra-short-focus projection light machine) so that the target assignment can be completely within the projection range. The grading results of the target assignment are then re-projected onto the test paper corresponding to the target assignment to complete accurate grading and precise projection of the target assignment.

[0081] Specifically, an optional implementation method is that the process of correcting the target job in the target image to obtain the correction result can be as follows: Figure 4 As shown, first, the range of the shooting area can be determined according to the specifications, installation height and angle information of the ultra-high-definition camera, and the original coordinate information of each pixel of the target image can be obtained with the center point of the job grading machine as the origin. Then, the range of the projection area can be determined according to the specifications, installation height and angle information of the ultra-short-throw projector, and the original coordinate information of the projected image can be obtained with the center point of the job grading machine as the origin. Next, the target job is automatically identified through the AI ​​job grading software, the coordinate information of the size and position of the target job is determined, and it is judged whether the target job is within the range of the projection area, and whether the target job is placed upright. If so, the AI ​​homework grading software will automatically take a photo, grade the target homework, and project the grading result onto the test paper at the corresponding position of the target homework based on the obtained coordinate information; otherwise, if not, the angle that the ultra-short-focus projection optical machine needs to rotate is calculated based on the coordinate information to control the rotation of the rotary motor so that the target homework can be completely within the projection range and consistent with the range of the target image. At the same time, the new projection image coordinates are determined based on the rotation angle, and then the AI ​​homework grading software will automatically take a photo, grade the target homework, and project the grading result onto the test paper at the corresponding position of the target homework based on the obtained coordinate information.

[0082] It should be noted that when using an ultra-clear camera to shoot, a free-form lens and automatic adjustment of the sensor position (i.e., adjusting the shooting position inside the camera state) are used to increase the range of capture and the allowable distortion. Distortion can be adjusted according to different jobs or paper size thicknesses in combination with different types of software algorithms, so that the captured image can be adjusted to a dimension that can be recognized by the image recognition software algorithm (such as the OCR recognition algorithm), making the captured target image more adaptable. The specific shooting effects are as follows: Figure 5 As shown, on the one hand, the target image can be turned right for easy identification, and on the other hand, the captured target can be made clearer. Figure 5 In the effect diagram shown, it can be seen that the preferred camera state is to use an additional focal length to achieve dual focal lengths so that the clarity of different positions of the recognized image is higher.

[0083] In addition, it should be noted that when the ultra-short-throw projector is projecting, it mainly uses camera technology and mechanical motion technology to achieve directional projection of the projection following the shooting area. In addition, the projection area needs to use ultra-short-throw lens technology, automatic focus, photo distortion algorithm, etc. to reversely achieve the projected image matching the original target paper of different sizes and thicknesses. The specific projection process is as follows: Figure 6 As shown, no further description is given here.

[0084] Next, this embodiment will introduce a homework correction and projection device:

[0085] See also Figure 7 , is a schematic diagram of the composition of a homework correction and projection device provided in this embodiment, the device 700 includes:

[0086] The shooting unit 701 is used to shoot a target image through a camera; the target image is an image containing a target homework to be corrected;

[0087] A correction unit 702, configured to perform correction processing on the target job in the target image to obtain a correction result of the target job;

[0088] The projection unit 703 is used to project the correction result of the target assignment onto the test paper corresponding to the target assignment through a projection optical machine; and when it is detected that the target assignment is beyond the projection range, adjust the direction and position of the projection optical machine according to the position of the target assignment, so that the target assignment is completely within the projection range.

[0089] In an implementation of this embodiment, the device further includes:

[0090] The control unit is used to start the homework grading machine, control the projection light machine to project the main interface of the display device, and control the projection light machine to rotate to an initial fixed position.

[0091] In an implementation of this embodiment, the shooting unit 701 is specifically used for:

[0092] In response to a preset photographing instruction made by the user, a target image is photographed through the camera.

[0093] In an implementation of this embodiment, the device further includes:

[0094] A determination unit is used to facilitate an image processing algorithm to process the target image to determine the position information of the target assignment, so as to project the correction result of the target assignment onto the test paper corresponding to the target assignment through a projection optical machine according to the position information of the target assignment; the test paper is used by the teacher to annotate the target assignment according to the projected correction result, explain the target assignment to the students, or prepare lessons.

[0095] Furthermore, the embodiment of the present application also provides a homework grading and projection device, including: a processor, a memory, and a system bus;

[0096] The processor and the memory are connected via the system bus;

[0097] The memory is used to store one or more programs, wherein the one or more programs include instructions, and when the instructions are executed by the processor, the processor executes any one of the implementation methods of the above-mentioned homework correction and projection method.

[0098] Furthermore, an embodiment of the present application also provides a computer-readable storage medium, in which instructions are stored. When the instructions are executed on a terminal device, the terminal device executes any one of the implementation methods of the above-mentioned homework correction and projection methods.

[0099] Furthermore, an embodiment of the present application also provides a computer program product, which, when executed on a terminal device, enables the terminal device to execute any one of the implementation methods of the above-mentioned homework grading and projection methods.

[0100] It can be known from the description of the above implementation mode that those skilled in the art can clearly understand that all or part of the steps in the above-mentioned embodiment method can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a storage medium such as ROM / RAM, a disk, an optical disk, etc., including several instructions for enabling a computer device (which can be a personal computer, a server, or a network communication device such as a media gateway, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0101] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0102] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0103] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A homework marking machine, characterized in that: The homework grading machine includes: a camera, a projection optical machine, a universal serial bus interface, and a main control board; The camera is used to capture a target image; the target image is an image containing the target homework to be corrected; The main control board is used to perform correction processing on the target job in the target image to obtain a correction result for the target job; The projection optical machine is used to project the correction result of the target assignment onto the test paper corresponding to the target assignment; The universal serial bus interface is used for connecting a charging adapter, development and debugging, and for connecting external devices.

2. The homework marking machine according to claim 1, characterized in that: The homework grading machine also includes: an antenna, an audio module, and a rotation module; The antenna is used to connect to the network; The audio module is used to implement the audio interaction function of the homework grading machine; The rotating module is used to adjust the direction and angle of the projection light machine to achieve the correction and projection of the target operation beyond the original projection range.

3. The homework marking machine according to claim 1, characterized in that: The main control board includes: a CPU chip, a power management chip, a WIFI module and / or a Bluetooth module; The power management chip is used to manage the charging and discharging of the device; The WIFI module is used to connect to the network; And / or the Bluetooth module is used to connect to a Bluetooth device.

4. A homework marking and projection method, characterized in that: The method adopts the homework marking machine as claimed in any one of claims 1 to 3, and the method comprises: Taking a target image by a camera; the target image is an image containing the target homework to be corrected; Performing a correction process on the target job in the target image to obtain a correction result for the target job; Projecting the correction result of the target assignment onto the test paper corresponding to the target assignment through a projection optical machine; When it is detected that the target operation is beyond the projection range, the direction and position of the projection light machine are adjusted according to the position of the target operation so that the target operation is completely within the projection range.

5. The method according to claim 4, characterized in that Before photographing the target image by the camera, the method further includes: The homework grading machine is started, and the projection light machine is controlled to project the main interface of the display device, and the projection light machine is controlled to rotate to an initial fixed position.

6. The method according to claim 4, characterized in that The step of photographing the target image by using a camera comprises: In response to a preset photographing instruction made by the user, a target image is photographed through the camera.

7. The method according to claim 6, characterized in that Before projecting the correction result of the target assignment onto the test paper corresponding to the target assignment by means of a projection optical machine, the method further includes: It is beneficial for the image processing algorithm to process the target image to determine the position information of the target assignment, so that according to the position information of the target assignment, the correction result of the target assignment can be projected onto the test paper corresponding to the target assignment through a projection optical machine. The test paper is used by the teacher to annotate the target assignment according to the projected correction result, explain the target assignment to students or prepare lessons.

8. A homework marking and projection device, characterized in that: include: A shooting unit, used for shooting a target image through a camera; The target image is an image containing the target homework to be corrected; A correction unit, used for performing correction processing on the target job in the target image to obtain a correction result of the target job; A projection unit, used to project the correction result of the target assignment onto the test paper corresponding to the target assignment through a projection optical machine; When it is detected that the target operation is beyond the projection range, the direction and position of the projection light machine are adjusted according to the position of the target operation so that the target operation is completely within the projection range.

9. A homework marking and projection device, characterized in that: include: Processor, memory, system bus; The processor and the memory are connected via the system bus; The memory is used to store one or more programs, wherein the one or more programs include instructions, and when the instructions are executed by the processor, the processor executes the method according to any one of claims 4 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed on a terminal device, the terminal device executes the method according to any one of claims 4 to 7.

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