Projection image correction method and projection equipment
By detecting light intensity using photoelectric sensors on the projection screen bezel, the system automatically determines whether the projected image covers the projection screen bezel, solving the problem of low calibration efficiency in projection equipment and achieving efficient calibration without manual intervention.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2026-05-15
AI Technical Summary
During the initial installation or use of existing projection equipment, the automatic geometric correction is inefficient, requiring users to manually determine whether the projected image meets the correction requirements, resulting in low operational efficiency and a high risk of errors.
The system uses photoelectric sensors located on the edge of the projection screen to detect light intensity, distinguish target image areas with different brightness, automatically determine whether the projection screen edge is completely covered, and output movement prompts or perform geometric corrections.
It can accurately determine the coverage of the projected image without user intervention, simplifying the operation process and improving calibration efficiency.
Smart Images
Figure CN122053802A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of projection technology, and in particular to a method for correcting projected images and a projection device. Background Technology
[0002] Currently, when the edge area of the projected image completely covers the border of the projection screen and the projected image does not extend too far beyond the projection screen, the projector's automatic geometric correction function can correct the projected image, ensuring that the projected image matches the projection screen and thus guaranteeing a good display effect.
[0003] However, during the initial installation of the projection equipment or during user use, if the display effect is poor and automatic geometric correction is required, it is necessary to manually determine whether the projected image meets the requirements of automatic geometric correction (i.e., the edge area of the projected image completely covers the border of the projection screen and the projected image does not exceed the projection screen by too much). This leads to low efficiency, and the result of human judgment may not be completely matched with the requirements of the automatic geometric correction function, ultimately making it difficult to achieve the expected correction effect. Summary of the Invention
[0004] This application provides a method, apparatus, and storage medium for correcting projected images, which can solve the problem of low efficiency in geometric correction in related technologies. The technical solution is as follows:
[0005] On one hand, a method for correcting projected images is provided, applied to a projection device including a projection host, the projection device further including a projection screen and multiple photoelectric sensors, the multiple photoelectric sensors being located on the bezel of the projection screen, the method comprising:
[0006] A target image card is projected onto the projection screen. The target image card includes a first region and a second region surrounding the first region. The brightness of the first region is different from the brightness of the second region.
[0007] The light intensity detected by the multiple photoelectric sensors is obtained to obtain multiple light intensities;
[0008] If it is determined based on the multiple light intensities that the second area does not completely cover the border of the projection screen, a movement prompt message is output. The movement prompt message is used to instruct the user to move the projection host so that the second area completely covers the border of the projection screen.
[0009] If it is determined based on the multiple light intensities that the second region completely covers the border of the projection screen, then the image to be projected on the projection host is geometrically corrected.
[0010] On the other hand, a projection device is provided, the projection device including a projection host, a projection screen and a plurality of photoelectric sensors, the plurality of photoelectric sensors being located on the bezel of the projection screen, the projection host including a processor, the processor being used for:
[0011] A target image card is projected onto the projection screen. The target image card includes a first region and a second region surrounding the first region. The brightness of the first region is different from the brightness of the second region.
[0012] The light intensity detected by the multiple photoelectric sensors is obtained to obtain multiple light intensities;
[0013] If it is determined based on the multiple light intensities that the second area does not completely cover the border of the projection screen, a movement prompt message is output. The movement prompt message is used to instruct the user to move the projection host so that the second area completely covers the border of the projection screen.
[0014] If it is determined based on the multiple light intensities that the second region completely covers the border of the projection screen, then the image to be projected on the projection host is geometrically corrected.
[0015] On the other hand, a projection image correction device is provided, included in a projection host of a projection device, the projection device further including a projection screen and a plurality of photoelectric sensors, the plurality of photoelectric sensors being located on the bezel of the projection screen, the device comprising:
[0016] A projection module is used to project a target image onto the projection screen. The target image includes a first region and a second region surrounding the first region. The brightness of the first region is different from the brightness of the second region.
[0017] The acquisition module is used to acquire the light intensity detected by the multiple photoelectric sensors respectively, so as to obtain multiple light intensities;
[0018] An output module is configured to output a movement prompt if it is determined based on the plurality of light intensities that the second area does not completely cover the border of the projection screen. The movement prompt is used to instruct the user to move the projection host so that the second area completely covers the border of the projection screen.
[0019] The correction module is used to perform geometric correction on the image to be projected by the projector if it is determined based on the plurality of light intensities that the second region completely covers the border of the projection screen.
[0020] On the other hand, a computer-readable storage medium is provided, wherein a computer program is stored therein, and when the computer program is executed by a processor, the steps of correcting the projected image described above are implemented.
[0021] On the other hand, a computer program product containing instructions is provided that, when the instructions are run on a computer, causes the computer to perform the steps of correcting the projected image described above.
[0022] The technical solution provided in this application can bring at least the following beneficial effects:
[0023] This application embodiment uses a photoelectric sensor located on the edge of the projection screen to detect the light intensity, thereby distinguishing between a first region and a second region with different brightness in the target image card, and thus accurately determining whether the target image card completely covers the projection screen. In this way, it can achieve operation without user intervention, thereby greatly simplifying the operation process and improving the correction efficiency of the projected image. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments 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.
[0025] Figure 1 This is a schematic diagram of a projection screen provided in an embodiment of this application;
[0026] Figure 2 This is a schematic diagram of a projection device provided in an embodiment of this application;
[0027] Figure 3 This is a flowchart of a method for correcting a projected image provided in an embodiment of this application;
[0028] Figure 4 This is a schematic diagram showing the positions of a projection screen and multiple photoelectric sensors provided in an embodiment of this application;
[0029] Figure 5 This is a schematic diagram of a target drawing card provided in an embodiment of this application;
[0030] Figure 6 This is a schematic diagram of a movement prompt message provided in an embodiment of this application;
[0031] Figure 7 This is a schematic diagram of another movement prompt message provided in an embodiment of this application;
[0032] Figure 8This is a schematic diagram of another movement prompt message provided in an embodiment of this application;
[0033] Figure 9 This is a schematic diagram of another movement prompt message provided in an embodiment of this application;
[0034] Figure 10 This is a schematic diagram of another movement prompt message provided in an embodiment of this application;
[0035] Figure 11 This is a schematic diagram of another movement prompt message provided in an embodiment of this application;
[0036] Figure 12 This is a structural block diagram of a projection device provided in an embodiment of this application. Detailed Implementation
[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.
[0038] Before providing a detailed explanation of the projection image correction method provided in the embodiments of this application, the application scenarios and implementation environment involved in the embodiments of this application will be introduced first.
[0039] First, the application scenarios involved in the embodiments of this application will be introduced.
[0040] Please refer to the following: Figure 1 When the edge area of the projected image completely covers the border of the projection screen and the projected image does not extend too far beyond the projection screen, the automatic geometric correction function of the projector can correct the size, shape and position of the projected image, so that the projected image matches the projection screen and ensures a good display effect.
[0041] However, in practice, especially during the initial installation of the projection equipment or during user use, if the display effect is poor and automatic geometric correction is required, it necessitates manual judgment to determine whether the projected image meets the requirements of automatic geometric correction (i.e., the edges of the projected image must exactly cover the border of the projection screen, but should not extend too far beyond the screen area). This method is inefficient, highly subjective, and prone to errors. Especially for ordinary users lacking professional knowledge, accurately defining the subtle boundary between "complete edge coverage" and "not extending too much" is particularly difficult, leading to the automatic correction process failing to achieve the desired effect. In some cases, it may even result in correction failure, and the projected image still cannot perfectly match the projection screen.
[0042] Based on this, this application provides a method for correcting projected images. By using a photoelectric sensor located on the edge of the projection screen to detect the light intensity, the method distinguishes between a first region and a second region with different brightness in the target image card, thereby accurately determining whether the target image card completely covers the projection screen. This method can achieve correction without user intervention, thus greatly simplifying the operation process and improving the efficiency of projected image correction.
[0043] The projection devices involved in the embodiments of this application will be described next.
[0044] Please refer to Figure 2 , Figure 2 This is a schematic diagram illustrating a projection device according to an exemplary embodiment. The projection device includes a projection host 01, a projection screen 02, and multiple photoelectric sensors 03. Figure 2 (The multiple photoelectric sensors are exemplarily represented by four photoelectric sensors). The projector host 101 can communicate with the projection screen 102. This communication connection can be wired or wireless, and this embodiment does not limit it; the multiple photoelectric sensors 03 are located on the bezel of the projection screen 02.
[0045] Among them, the projector 01 is usually installed on a desktop or on the ceiling, while the projection screen 02 is usually installed on the wall.
[0046] During the image correction process, the projector 01 projects a target image onto the projection screen 02. The target image includes a first region and a second region surrounding the first region. The brightness of the first region differs from that of the second region. Multiple photoelectric sensors 03 detect the light intensity, resulting in multiple light intensities. If, based on these multiple light intensities, it is determined that the second region does not completely cover the border of the projection screen, a movement prompt is output. This prompt instructs the user to move the projector 01 so that the second region completely covers the border of the projection screen 02. If, based on these multiple light intensities, it is determined that the second region completely covers the border of the projection screen 02, geometric correction is performed on the image to be projected onto the projector 01.
[0047] Those skilled in the art should understand that the functions of the above-described projection host 01, projection screen 02, and multiple photoelectric sensors 03 are merely examples. Other existing or future functions that may be applicable to the embodiments of this application should also be included within the scope of protection of the embodiments of this application, and are hereby incorporated by reference.
[0048] It should be noted that the application scenarios and execution entities described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the emergence of new application scenarios and devices, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.
[0049] The method for correcting projected images provided in the embodiments of this application will now be explained in detail.
[0050] Figure 3 This is a flowchart illustrating a method for correcting a projected image according to an embodiment of this application. The method is applied to a projection device including a projection host, which also includes a projection screen and multiple photoelectric sensors located on the bezel of the projection screen. Please refer to... Figure 3 The method includes the following steps.
[0051] Step 301: Project the target image card onto the projection screen. The target image card includes a first area and a second area surrounding the first area. The brightness of the first area is different from that of the second area.
[0052] In some embodiments, the projection screen includes a plurality of vertices, each of which is equipped with a photoelectric sensor.
[0053] For example, please refer to Figure 4 , Figure 4 This is a schematic diagram illustrating the positions of a projection screen and multiple photoelectric sensors provided in an embodiment of this application. The projection screen is rectangular, and a photoelectric sensor is deployed at each of the four vertices of the rectangle. In this case, please refer to... Figure 5 , Figure 5 This is a schematic diagram of a target graphic card provided in an embodiment of this application. The target graphic card includes region 1 and region 2, wherein region 1 is a first region and region 2 is a second region.
[0054] Step 302: Obtain the light intensity detected by multiple photoelectric sensors to obtain multiple light intensities.
[0055] Step 303: If it is determined based on multiple light intensities that the second area does not completely cover the border of the projection screen, then output a movement prompt message. The movement prompt message is used to instruct the user to move the projector so that the second area completely covers the border of the projection screen.
[0056] In one possible implementation, the movement prompt information includes the movement method of the projector host, which is used to instruct the user to move the projector host according to the movement method so that the second area completely covers the border of the projection screen.
[0057] If, based on multiple light intensities, it is determined that the second area does not completely cover the border of the projection screen, it indicates that the projected image does not meet the requirements of automatic geometric correction. Therefore, a movement prompt message needs to be output to prompt the user to move the projector so that the second area completely covers the border of the projection screen.
[0058] In some embodiments, the movement prompt information includes the movement method of the projector host. The movement prompt information instructs the user to move the projector host according to the movement method so that the second area completely covers the border of the projection screen. In this case, before outputting the movement prompt information, the projector host can determine the movement method based on multiple light intensities. This improves user operability and thus enhances the user experience.
[0059] The movement method of the projector will vary depending on the light intensity. The following sections will describe three of these scenarios in detail.
[0060] In the first scenario, the light intensity projected onto the projection screen from the first area is the first reference light intensity, and the light intensity projected onto the projection screen from the second area is the second reference light intensity. The first reference light intensity and the second reference light intensity are different. In this case, if multiple light intensities are all within the range of the second light intensity, the movement method is determined to be that the projector moves towards the projection screen. Here, the range of the second light intensity includes the first reference light intensity, and the range of the second light intensity is determined by the first reference light intensity and its fluctuation range. The range of the second light intensity does not overlap with the range of the first light intensity. The range of the first light intensity includes the second reference light intensity, and the range of the first light intensity is determined by the fluctuation range of the second reference light intensity and the second reference light intensity.
[0061] Since the first area is surrounded by the second area, it indicates that the first area is the central area of the target image card. The light intensity projected from the first area onto the projection screen is the first reference light intensity. Therefore, if multiple light intensities are within the range of the second light intensity, it means that the target image card projected by the projector is relatively large compared to the projection screen, causing the edge of the projection screen to be covered by the first area. Therefore, it can be determined that the movement method is for the projector to move towards the projection screen to reduce the size of the target image card projected onto the projection screen, so that the second area completely covers the edge of the projection screen.
[0062] The second light intensity range is determined based on the first reference light intensity (i.e., the light intensity projected onto the projection screen from the first region) and its fluctuation range, while the first light intensity range is determined based on the second reference light intensity (i.e., the light intensity projected onto the projection screen from the second region) and its fluctuation range. This method of dynamically determining the light intensity range takes into account the natural fluctuations in light intensity, thus improving the robustness of the system.
[0063] In some embodiments, the upper limit of the first light intensity range is the sum of the second reference light intensity and the upper limit of the fluctuation range of the second reference light intensity, and the lower limit of the first light intensity range is the sum of the second reference light intensity and the lower limit of the fluctuation range of the second reference light intensity. Similarly, the upper limit of the second light intensity range is the sum of the first reference light intensity and the upper limit of the fluctuation range of the first reference light intensity, and the lower limit of the first light intensity range is the sum of the first reference light intensity and the lower limit of the fluctuation range of the first reference light intensity.
[0064] In one possible implementation, the brightness of the first region is less than the brightness of the second region. In this case, the first reference light intensity is less than the second reference light intensity. Of course, in another possible implementation, the brightness of the first region may be greater than the brightness of the second region. In this case, the first reference light intensity is greater than the second reference light intensity. This application does not limit the implementation in this way.
[0065] In the second scenario, if multiple light intensities are all within the third light intensity range, the movement method is determined to be that the projector moves away from the projection screen; wherein the third light intensity range does not overlap with the first light intensity range or the second light intensity range.
[0066] Since the third light intensity range does not overlap with either the first or second light intensity ranges, this means that when the detected light intensity falls within the third light intensity range, it is neither a fluctuation value near the first reference light intensity nor a fluctuation value near the second reference light intensity. Therefore, it can be inferred that the target image is projected inside the projection screen and does not cover the screen's border. This may be because the projector is too close to the screen, resulting in a smaller projected image. In this case, the movement method can be determined as moving the projector away from the screen to increase the size of the target image projected onto the screen, thus ensuring that the second area completely covers the screen's border.
[0067] In the third case, the projection screen includes multiple vertices, and multiple light intensities correspond one-to-one with multiple vertices. In this case, if the multiple light intensities include a first type of light intensity and a second type of light intensity, the movement mode of the projection host is determined based on the positional relationship between the vertex corresponding to the second type of light intensity and the vertex corresponding to the first type of light intensity.
[0068] In this context, the upper limit of the illumination range containing any illumination intensity of the second type is less than the lower limit of the illumination range containing any illumination intensity of the first type. The illumination range includes a first illumination range, a second illumination range, and a third illumination range that do not overlap. The brightness of the first region is less than the brightness of the second region, and the first reference light intensity is less than the second reference light intensity. The upper limit of the third illumination range is less than the lower limit of any one of the first or second illumination ranges.
[0069] The process of determining the movement mode of the projection host based on the positional relationship between the vertex corresponding to the second type of illumination intensity and the vertex corresponding to the first type of illumination intensity includes: determining the first vertex from the vertices corresponding to the first type of illumination intensity, determining the second vertex from the vertices corresponding to the second type of illumination intensity, and determining the movement mode of the projection host based on the position of the second vertex relative to the first vertex.
[0070] In some embodiments, the projection screen is rectangular and includes four vertices. The implementation processes for the first and second vertices differ depending on the number of vertices corresponding to the second type of illumination intensity, and will be described separately below.
[0071] In the first scenario, there are three vertices corresponding to the second type of lighting intensity, and one vertex corresponding to the first type of lighting intensity. In this case, the vertex corresponding to the first type of lighting intensity is designated as the first vertex, and any vertex among the vertices corresponding to the second type of lighting intensity that is not on the same horizontal direction as the vertex corresponding to the first type of lighting intensity is designated as the second vertex.
[0072] In the second scenario, there are two vertices corresponding to the second type of lighting intensity, and two vertices corresponding to the first type of lighting intensity. In this case, any vertex corresponding to the second type of lighting intensity is designated as the second vertex. The vertex corresponding to the first type of lighting intensity that is in the same horizontal or vertical direction as the second vertex is designated as the first vertex.
[0073] In the third case, the number of vertices corresponding to the second type of lighting intensity is one, and the number of vertices corresponding to the first type of lighting intensity is three. The vertex corresponding to the second type of lighting intensity is designated as the second vertex. Any vertex among the vertices corresponding to the first type of lighting intensity that is not on the same horizontal direction as the second vertex is designated as the first vertex.
[0074] Since the illumination range of the second vertex is either the second illumination range or the first illumination range, the movement mode of the projection host is determined differently based on the position of the second vertex relative to the first vertex under different circumstances. These will be introduced separately below.
[0075] If the illumination range of the second vertex is within the third illumination range, and if the first and second vertices are not on the same vertical direction, the projector's movement is determined to be either rotating the projector towards the target direction (the direction from the first vertex to the second vertex). If the first and second vertices are on the same vertical direction, and the second vertex is below the first vertex, the projector's movement is determined to be moving the projector closer to the projection screen. If the first and second vertices are on the same vertical direction, and the second vertex is above the first vertex, the projector's movement is determined to be moving the projector away from the projection screen.
[0076] If the illumination intensity at the second vertex falls within the second illumination range, and if the first and second vertices are not on the same vertical direction, the projector's movement is determined to be either rotating the projector towards the target direction (the direction from the second vertex to the first vertex). If the first and second vertices are on the same vertical direction, and the second vertex is below the first vertex, the projector's movement is determined to be moving the projector away from the projection screen. If the first and second vertices are on the same vertical direction, and the second vertex is above the first vertex, the projector's movement is determined to be moving the projector closer to the projection screen.
[0077] In some embodiments, movement prompts may be displayed in a first area of the target image card. Of course, in other embodiments, the projector includes a speaker to broadcast movement prompts for voice prompts; this application does not limit this approach.
[0078] For example, please refer to Figure 6 to Figure 11 This is a schematic diagram of a movement prompt message provided in an embodiment of this application. The movement prompt message is displayed in a first area of the target image card, and the illumination range where the illumination intensity of the second vertex is located is the second illumination range. Please refer to... Figure 6 When the movement method involves moving the projector closer to the projection screen, the image projected onto the screen can be... Figure 6 The target image is shown. Please refer to it. Figure 7 When the movement method involves moving the projector away from the projection screen, the image projected onto the screen can be... Figure 7 The target image is shown. Please refer to it. Figure 8 If the direction from the second vertex to the first vertex is left, then when the projector rotates towards the target direction, the image projected onto the projection screen can be... Figure 8 The target image is shown. Please refer to it. Figure 9If the direction from the second vertex to the first vertex is left, then when the projector moves towards the target direction, the image projected onto the projection screen can be displayed as shown in the image. Figure 9 The target image is shown. Please refer to it. Figure 10 If the direction from the second vertex to the first vertex is to the right, then when the projector rotates towards the target direction, the image projected onto the projection screen can be displayed as shown in the image. Figure 10 The target image is shown. Please refer to it. Figure 11 If the direction from the second vertex to the first vertex is to the right, then when the projector moves towards the target direction, the image projected onto the projection screen can be displayed as shown below. Figure 11 The target diagram shown.
[0079] The above-mentioned display of arrows in the first area of the target image is only one implementation method. In other embodiments, text may also be displayed, etc. This application does not limit this.
[0080] Step 304: If it is determined that the second region completely covers the border of the projection screen based on multiple light intensities, then the image to be projected on the projector is geometrically corrected.
[0081] If it is determined based on multiple light intensities that the second region completely covers the border of the projection screen, then the image to be projected by the projector is geometrically corrected according to the automatic geometric correction method of the relevant technology.
[0082] In some embodiments, the light intensity projected onto the projection screen from the first region is a first reference light intensity, and the light intensity projected onto the projection screen from the second region is a second reference light intensity, wherein the first reference light intensity and the second reference light intensity are different; in this case, if multiple light intensities are all within the range of the first light intensity, it is determined that the second region completely covers the border of the projection screen; if at least one of the multiple light intensities is outside the range of the first light intensity, it is determined that the second region does not completely cover the border of the projection screen; wherein the first light intensity range includes the second reference light intensity, and the first light intensity range is determined by the fluctuation range of the second reference light intensity and the second reference light intensity.
[0083] In some embodiments, the upper limit of the first light intensity range is the sum of the second reference light intensity and the upper limit of the fluctuation range of the second reference light intensity, and the lower limit of the first light intensity range is the sum of the second reference light intensity and the lower limit of the fluctuation range of the second reference light intensity.
[0084] Since the light intensity projected onto the projection screen from the second region is the second reference light intensity, and the first light intensity range is determined by the fluctuation range of the second reference light intensity, if multiple light intensities are all within the first light intensity range, it indicates that the frame of the projection screen is completely covered by the second region. If at least one light intensity is outside the first light intensity range, it indicates that there are areas within the frame of the projection screen that are not covered by the second region, thus confirming that the second region does not completely cover the frame of the projection screen.
[0085] This application embodiment uses a photoelectric sensor located on the edge of the projection screen to detect the light intensity, thereby distinguishing between a first region and a second region with different brightness in the target image card, and thus accurately determining whether the target image card completely covers the projection screen. In this way, it can achieve operation without user intervention, thereby greatly simplifying the operation process and improving the correction efficiency of the projected image.
[0086] This application also provides a schematic diagram of a projection image correction device, which can be implemented as part or all of the projector host by software, hardware, or a combination of both. The device includes: a projection module, an acquisition module, an output module, and a correction module.
[0087] The projection module is used to project a target image onto a projection screen. The target image includes a first area and a second area surrounding the first area. The brightness of the first area is different from that of the second area.
[0088] The acquisition module is used to acquire the light intensity detected by multiple photoelectric sensors to obtain multiple light intensities.
[0089] The output module is used to output a movement prompt message if it is determined based on multiple light intensities that the second area does not completely cover the border of the projection screen. The movement prompt message is used to instruct the user to move the projector so that the second area completely covers the border of the projection screen.
[0090] The correction module is used to perform geometric correction on the image to be projected by the projector if it is determined based on multiple light intensities that the second region completely covers the border of the projection screen.
[0091] In one possible implementation, the projection screen comprises multiple vertices, each of which is equipped with a photoelectric sensor.
[0092] In one possible implementation, the light intensity projected onto the projection screen from the first region is a first reference light intensity, and the light intensity projected onto the projection screen from the second region is a second reference light intensity, wherein the first reference light intensity and the second reference light intensity are different; the device further includes:
[0093] The first determining module is used to determine that if multiple light intensities are all within the first light intensity range, the second region completely covers the border of the projection screen.
[0094] The second determining module is used to determine that the second region does not completely cover the border of the projection screen if at least one of the multiple light intensities is outside the first light intensity range.
[0095] The first light intensity range includes the second reference light intensity, and the first light intensity range is determined by the fluctuation range of the second reference light intensity and the second reference light intensity.
[0096] In one possible implementation, the movement prompt information includes the movement method of the projector host, which is used to instruct the user to move the projector host according to the movement method so that the second area completely covers the border of the projection screen.
[0097] Before outputting movement prompt information, the device also includes:
[0098] The third determining module is used to determine the movement mode of the projector host based on multiple light intensities.
[0099] In one possible implementation, the light intensity projected onto the projection screen from the first region is a first reference light intensity, and the light intensity projected onto the projection screen from the second region is a second reference light intensity. The first reference light intensity and the second reference light intensity are different.
[0100] The third determination module is specifically used for:
[0101] If multiple light intensities are all within the second light intensity range, then the movement method is determined to be that the projector moves towards the projection screen.
[0102] The second light intensity range includes the first reference light intensity. The second light intensity range is determined by the first reference light intensity and the fluctuation range of the first reference light intensity. The second light intensity range does not overlap with the first light intensity range. The first light intensity range includes the second reference light intensity. The first light intensity range is determined by the fluctuation range of the second reference light intensity and the second reference light intensity.
[0103] In one possible implementation, the device further includes:
[0104] The fourth determining module is used to determine the movement mode as the projector moving away from the projection screen if multiple light intensities are all within the third light intensity range.
[0105] The third light intensity range does not overlap with the first light intensity range or the second light intensity range.
[0106] In one possible implementation, the projection screen includes multiple vertices, and multiple light intensities correspond one-to-one with the multiple vertices;
[0107] The device also includes:
[0108] The fifth determining module is used to determine the movement mode of the projection host based on the positional relationship between the vertex corresponding to the second type of light intensity and the vertex corresponding to the first type of light intensity if multiple light intensities include the first type of light intensity and the second type of light intensity.
[0109] In this case, the upper limit of the illumination range of any illumination intensity in the second type of illumination intensity is less than the lower limit of the illumination range of each illumination intensity in the first type of illumination intensity. The illumination range includes a first illumination range, a second illumination range, and a third illumination range that do not overlap with each other. The brightness of the first region is less than the brightness of the second region, and the first reference light intensity is less than the second reference light intensity.
[0110] This application embodiment uses a photoelectric sensor located on the edge of the projection screen to detect the light intensity, thereby distinguishing between a first region and a second region with different brightness in the target image card, and thus accurately determining whether the target image card completely covers the projection screen. In this way, it can achieve operation without user intervention, thereby greatly simplifying the operation process and improving the correction efficiency of the projected image.
[0111] It should be noted that the projection image correction device provided in the above embodiments is only illustrated by the division of the above functional modules when correcting projection images. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the projection image correction device and the projection image correction method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.
[0112] Figure 12 This is a structural block diagram of a projection device 1200 provided in an embodiment of this application. The projection device 1200 includes a projection host 1201 and a projection screen 1202. The projection host 1201 may include a processor 12011 and a memory 12012.
[0113] Optionally, the projector 1201 may also include a remote microphone for voice assistant and chat functions. The projection screen 1202 is used to display graphics, text, icons, videos, and other information. The projection screen 1202 has a photoelectric sensor 12021.
[0114] Processor 12011 includes one or more processing cores, such as a quad-core processor or an octa-core processor. Processor 12011 can be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 12011 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 12011 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, processor 12011 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.
[0115] The memory 12012 may include one or more computer-readable storage media, which may be non-transitory. The memory 12012 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory 12012 are used to store at least one instruction, which is executed by the processor 12012 to implement the audio playback method provided in the method embodiments of this application.
[0116] Optionally, the projector 1201 may also have built-in speakers or other devices, or the projector 1201 may be connected to other peripherals, such as a subwoofer.
[0117] Those skilled in the art will understand that Figure 12 The structure shown does not constitute a limitation on the projection device 1200, and may include more or fewer components than shown, or combine certain components, or use different component arrangements.
[0118] In some embodiments, a computer-readable storage medium is also provided, which stores a computer program that, when executed by a processor, implements the steps of the projection image correction method described in the above embodiments. For example, the computer-readable storage medium may be a ROM, RAM, CD-ROM, magnetic tape, floppy disk, or optical data storage device.
[0119] It is worth noting that the computer-readable storage medium mentioned in the embodiments of this application can be a non-volatile storage medium, in other words, it can be a non-transient storage medium.
[0120] It should be understood that all or part of the steps of the above embodiments can be implemented by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented wholly or partially in the form of a computer program product. The computer program product includes one or more computer instructions. The computer instructions can be stored in the above-described computer-readable storage medium.
[0121] That is, in some embodiments, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to perform the steps of the above-described method for correcting projected images.
[0122] It should be understood that "at least one" as mentioned herein refers to one or more, and "multiple" refers to two or more. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. In addition, in order to clearly describe the technical solutions of the embodiments of this application, the terms "first," "second," etc., are used in the embodiments of this application to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first," "second," etc., do not limit the quantity or execution order, and the terms "first," "second," etc., are not necessarily different.
[0123] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.), and signals involved in the embodiments of this application are all authorized by the user or fully authorized by all parties, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the light intensity involved in the embodiments of this application was obtained under full authorization.
[0124] The above descriptions are embodiments provided in this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A method for correcting a projected image, characterized in that, The method is applied to a projection device including a projection host, the projection device further including a projection screen and a plurality of photoelectric sensors, the plurality of photoelectric sensors being located on the bezel of the projection screen, the method comprising: A target image card is projected onto the projection screen. The target image card includes a first region and a second region surrounding the first region. The brightness of the first region is different from the brightness of the second region. The light intensity detected by the multiple photoelectric sensors is obtained to obtain multiple light intensities; If it is determined based on the multiple light intensities that the second area does not completely cover the border of the projection screen, a movement prompt message is output. The movement prompt message is used to instruct the user to move the projection host so that the second area completely covers the border of the projection screen. If it is determined based on the multiple light intensities that the second region completely covers the border of the projection screen, then the image to be projected on the projection host is geometrically corrected.
2. The method as described in claim 1, characterized in that, The projection screen includes multiple vertices, and each of the multiple vertices is equipped with the photoelectric sensor.
3. The method as described in claim 1 or 2, characterized in that, The light intensity projected onto the projection screen from the first region is a first reference light intensity, and the light intensity projected onto the projection screen from the second region is a second reference light intensity, wherein the first reference light intensity and the second reference light intensity are different; the method further includes: If all of the multiple light intensities are within the first light intensity range, then it is determined that the second region completely covers the border of the projection screen; If at least one of the plurality of light intensities is outside the first light intensity range, then it is determined that the second region does not completely cover the border of the projection screen; The first light intensity range includes the second reference light intensity, and the first light intensity range is determined by the fluctuation range of the second reference light intensity and the second reference light intensity.
4. The method as described in claim 1 or 2, characterized in that, The movement prompt information includes the movement method of the projection host. The movement prompt information is used to instruct the user to move the projection host according to the movement method so that the second area completely covers the border of the projection screen. Before outputting the movement prompt information, the method further includes: The movement mode of the projection host is determined based on the multiple light intensities.
5. The method as described in claim 4, characterized in that, The light intensity projected onto the projection screen from the first region is a first reference light intensity, and the light intensity projected onto the projection screen from the second region is a second reference light intensity. The first reference light intensity and the second reference light intensity are different. Determining the movement mode of the projection host based on the multiple light intensities includes: If all of the multiple light intensities are within the second light intensity range, then the movement mode is determined to be the projection host moving towards the projection screen; Wherein, the second light intensity range includes the first reference light intensity, the second light intensity range is determined by the first reference light intensity and the fluctuation range of the first reference light intensity, the second light intensity range does not overlap with the first light intensity range, the first light intensity range includes the second reference light intensity, and the first light intensity range is determined by the second reference light intensity and the fluctuation range of the second reference light intensity.
6. The method as described in claim 5, characterized in that, The method further includes: If all of the multiple light intensities are within the third light intensity range, then the movement mode is determined to be the projection host moving away from the projection screen; The third light intensity range does not overlap with either the first light intensity range or the second light intensity range.
7. The method as described in claim 5 or 6, characterized in that, The projection screen includes multiple vertices, and the multiple light intensities correspond one-to-one with the multiple vertices; The method further includes: If the plurality of light intensities include a first type of light intensity and a second type of light intensity, then the movement mode of the projection host is determined based on the positional relationship between the vertex corresponding to the second type of light intensity and the vertex corresponding to the first type of light intensity. Wherein, the upper limit of the illumination range of any one of the second type of illumination intensities is less than the lower limit of the illumination range of each of the first type of illumination intensities, and the illumination range includes the first illumination range, the second illumination range and the third illumination range that do not overlap with each other, the brightness of the first region is less than the brightness of the second region, and the first reference light intensity is less than the second reference light intensity.
8. A projection device, characterized in that, The projection device includes a projection host, a projection screen, and multiple photoelectric sensors located on the bezel of the projection screen. The projection host includes a processor, which is used for: A target image card is projected onto the projection screen. The target image card includes a first region and a second region surrounding the first region. The brightness of the first region is different from the brightness of the second region. The light intensity detected by the multiple photoelectric sensors is obtained to obtain multiple light intensities; If it is determined based on the multiple light intensities that the second area does not completely cover the border of the projection screen, a movement prompt message is output. The movement prompt message is used to instruct the user to move the projection host so that the second area completely covers the border of the projection screen. If it is determined based on the multiple light intensities that the second region completely covers the border of the projection screen, then the image to be projected on the projection host is geometrically corrected.
9. The projection device as described in claim 8, characterized in that, The projection screen includes multiple vertices, and each of the multiple vertices is equipped with the photoelectric sensor.
10. The projection device as described in claim 8 or 9, characterized in that, The light intensity projected onto the projection screen from the first region is a first reference light intensity, and the light intensity projected onto the projection screen from the second region is a second reference light intensity. The first reference light intensity and the second reference light intensity are different. The processor is used to: If all of the multiple light intensities are within the first light intensity range, then it is determined that the second region completely covers the border of the projection screen; If at least one of the plurality of light intensities is outside the first light intensity range, then it is determined that the second region does not completely cover the border of the projection screen; The first light intensity range includes the second reference light intensity, and the first light intensity range is determined by the fluctuation range of the second reference light intensity and the second reference light intensity.