WO2022062604A1 - Procédé et appareil de réglage d'écran de projection, projecteur et support de stockage - Google Patents

Procédé et appareil de réglage d'écran de projection, projecteur et support de stockage Download PDF

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Publication number
WO2022062604A1
WO2022062604A1 PCT/CN2021/106993 CN2021106993W WO2022062604A1 WO 2022062604 A1 WO2022062604 A1 WO 2022062604A1 CN 2021106993 W CN2021106993 W CN 2021106993W WO 2022062604 A1 WO2022062604 A1 WO 2022062604A1
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Prior art keywords
projection
area
selected target
target area
effective
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PCT/CN2021/106993
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English (en)
Chinese (zh)
Inventor
冉鹏
余金清
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成都极米科技股份有限公司
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Publication of WO2022062604A1 publication Critical patent/WO2022062604A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]

Definitions

  • the present application relates to the field of projectors, and in particular, to a method, device, projector and storage medium for adjusting a projection screen.
  • the projector can adjust the projected image through an adaptive adjustment method, avoid corners or obstacles, adjust the image to an area suitable for projection, and adjust it into a rectangle.
  • the adjustment is realized at the expense of reducing the brightness and image quality of the projected image.
  • the purpose of the present application is to provide a projection image adjustment method, device, projector and storage medium, which can adjust the projection image and reduce the loss of brightness and image quality of the projection image.
  • an embodiment of the present application provides a projection image adjustment method, which is applied to a projector, where the projector includes an optical machine, and the method includes:
  • Adjusting step adjusting the projection focal length of the optical machine to change the size of the current projection area of the optical machine; correcting the effective projection picture in the current projection area to change the shape of the effective projection picture;
  • the adjusting step is performed at least once to project the effective projection image to the selected target area.
  • the step of performing the adjustment step at least once to project the effective projection image to the selected target area includes:
  • the first projection area includes the selected target area
  • the step of performing the adjustment step at least once to project the effective projection image to the selected target area includes:
  • the selected inscribed rectangle is the inscribed rectangle of the current projection area
  • the selected inscribed rectangle is the inscribed rectangle of the current projection area
  • the selected inscribed rectangle is matching the inscribed rectangle with the selected target area
  • the effective projection image is not projected to the selected target area, adjust the projection focal length of the opto-mechanical so as to zoom the current projection area to a second projection area; the second projection area includes all the selected target area;
  • the step of adjusting the projection focal length of the optomechanical includes:
  • the zoom factor of the optical-mechanical projection focal length is adjusted to the Z times, or the zoom factor of the opto-mechanical projection focal length is adjusted to the target zoom factor.
  • the step of calculating the target zoom factor of the projection focal length of the opto-mechanical when the current projection area is zoomed to just include the selected target area includes:
  • the target zoom area includes the selected target area and is connected to a boundary point of the selected target area;
  • the step of acquiring the selected target area includes:
  • the selected target area is acquired in the barrier-free area; the selected target area is the largest inscribed rectangle in the barrier-free area that conforms to a preset throw ratio.
  • an embodiment of the present application further provides a method for adjusting a projection image, which is applied to a projector, where the projector includes an optical machine, and the method includes:
  • the first projection area includes the selected target area
  • an embodiment of the present application further provides a method for adjusting a projection image, which is applied to a projector, where the projector includes an optical machine, and the method includes:
  • the selected inscribed rectangle is the inscribed rectangle of the current projection area, and the selected inscribed rectangle matches the selected target area;
  • the effective projection image is not projected to the selected target area, adjust the projection focal length of the opto-mechanical so as to zoom the current projection area to a second projection area; the second projection area includes all the selected target area;
  • an embodiment of the present application further provides a method for adjusting a projection image, which is applied to a projector, where the projector includes an optical machine, and the method includes:
  • an embodiment of the present application provides a projection image adjustment device, which is applied to a projector, where the projector includes an optical machine, and the device includes:
  • Get module used to get the selected target area
  • an adjustment module for performing adjustment steps: adjusting the projection focal length of the optical machine to change the size of the current projection area of the optical machine; correcting the effective projection picture in the current projection area to change the effective projection picture shape;
  • the adjustment module is further configured to perform the adjustment step at least once to project the effective projection image to the selected target area.
  • an embodiment of the present application provides a projection image adjustment device, which is applied to a projector, where the projector includes an optical machine, and the device includes:
  • Get module used to get the selected target area
  • an adjustment module configured to adjust the projection focal length of the opto-mechanical, so as to zoom the current projection area of the opto-mechanical to a first projection area; the first projection area includes the selected target area;
  • the adjustment module is further configured to correct the effective projection picture in the current projection area, so as to project the effective projection picture to the selected target area.
  • an embodiment of the present application provides a projection image adjustment device, which is applied to a projector, where the projector includes an optical machine, and the device includes:
  • Get module used to get the selected target area
  • the adjustment module is used to correct the effective projection picture in the current projection area of the optomechanical machine, so as to project the effective projection picture into the selected inscribed rectangle;
  • the selected inscribed rectangle is the an inscribed rectangle, and the selected inscribed rectangle matches the selected target area;
  • the adjustment module is further configured to adjust the projection focal length of the optomechanical under the condition that the effective projection picture is not projected to the selected target area, so as to zoom the current projection area to the second projection area; the second projection area includes the selected target area;
  • the adjustment module is further configured to correct the effective projection picture in the current projection area under the condition that the effective projection picture has not been projected to the selected target area, so as to project the effective projection picture to the selected target area. the selected target area.
  • an embodiment of the present application provides a projection image adjustment device, which is applied to a projector, where the projector includes an optical machine, and the device includes:
  • Get module used to get the selected target area
  • an adjustment module for adjusting the projection focal length of the optomechanical so as to project an effective projection image to the selected target area
  • the adjustment module is used to adjust the projection focal length of the optomechanical to change the size of the current projection area of the optomechanical, and to correct the effective projection picture in the original projection area of the optomechanical to change the size of the effective projection picture shape so that the effective projection image is projected onto the selected target area.
  • an embodiment of the present application provides a projector, including:
  • control unit includes a processor and a memory
  • the memory stores program instructions
  • the processor is configured to execute the program instructions to implement the method described in any one of the foregoing embodiments.
  • an embodiment of the present application provides a storage medium, where program instructions are stored on the storage medium, and when the program instructions are executed by a processor, the method described in any one of the foregoing embodiments is implemented.
  • the projection image adjustment method, device, projector and storage medium provided by the embodiments of the present application adopt the adjustment method of “adjusting the projection focal length of the optical machine” and “correcting the effective projection image in the current projection area” to effectively project the image.
  • the screen is projected to the selected target area.
  • the adjustment of the projection focal length of the optomechanical can ensure that the loss of brightness and image quality can be avoided when the projection image is zoomed and zoomed, and it is compared with the correction of the effective projection image in the current projection area.
  • the combination of the method can realize the adjustment of the projection image quickly and efficiently, project the projection image to the selected target area, and reduce the loss of the brightness and image quality of the projection image.
  • FIG. 1 is a schematic diagram of a scene where a projector projects an image to a projection medium
  • FIG. 2 is a schematic diagram showing a non-rectangular "trapezoid" on the projection screen of the projector
  • 3 is a schematic diagram of the picture resolution and picture quality loss of the adjusted projection picture
  • Fig. 4 is the schematic diagram of "gray edge" in the projection picture of the projector
  • Fig. 5 is the calibration schematic diagram of the projection picture
  • FIG. 6 is a structural block diagram of a projector provided by an embodiment of the present application.
  • FIG. 7 is a structural block diagram of a control unit of a projector provided by an embodiment of the present application.
  • FIG. 8 is a flowchart of a method for adjusting a projection image provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of an application scenario of the projection image adjustment method provided by the embodiment of the present application.
  • FIG. 10 is a schematic diagram of an application scenario of the projection image adjustment method provided by the embodiment of the present application.
  • FIG. 11 is a flowchart of S210 of the projection image adjustment method provided by the embodiment of the application.
  • FIG. 12 is a schematic diagram of an application scenario of the projection image adjustment method provided by the embodiment of the present application.
  • FIG. 13 is a schematic diagram of an application scenario of the projection image adjustment method provided by the embodiment of the present application.
  • 16 is a schematic diagram of an application scenario of the projection image adjustment method provided by the embodiment of the application.
  • 17 is a schematic diagram of an application scenario of the projection image adjustment method provided by the embodiment of the present application.
  • FIG. 18 is a schematic diagram of an application scenario of the projection image adjustment method provided by the embodiment of the present application.
  • FIG. 20 is a flowchart of S200 of the projection image adjustment method provided by the embodiment of the application.
  • FIG. 21 shows a flowchart of another method for adjusting a projection image provided by an embodiment of the present application.
  • FIG. 22 shows a flowchart of another method for adjusting a projection image provided by an embodiment of the present application.
  • FIG. 23 shows a flowchart of another method for adjusting a projection image provided by an embodiment of the present application.
  • the projection screen projected by the projector's optical machine should face the projection screen or projection wall (also known as the projection medium) as much as possible to ensure that the screen has no vertical or horizontal angle.
  • the effect of projection (as shown in Figure 1).
  • the projection picture projected by the optical machine of the projector basically has an included angle in the vertical direction or the horizontal direction with the plane of the projection medium.
  • the projected image projected by the projector will present a non-rectangular "trapezoid" state (as shown in Figure 2).
  • the manual mode means that the user calls up the adjustment setting menu, and adjusts the shape of the projection screen by manually controlling the positions of several vertices of the projection screen;
  • the automatic mode is the plane (also known as the plane of the projection medium) collected by the image acquisition module of the projector. It can be called as the projection surface) information, and the projection image is automatically corrected into a rectangle by automatic compensation of the position of the projection image.
  • the normal display content in the projection screen (also known as the effective projection screen) will become smaller, but because the internal structure of the projector's optical machine cannot completely block light, the user can see the normal display.
  • There are obvious “gray borders” around the displayed content (as shown in Figure 4), and the smaller the effective projection screen in the projection screen is, the larger the "gray borders”.
  • the projector can also perform digital zoom zoom.
  • the effective projection picture in the projection picture can be reduced by means of digital zoom.
  • this method also has image quality loss and "gray edge” phenomenon, and the larger the zoom ratio, the more obvious the image quality loss and the larger the "gray edge” area.
  • the current projectors basically have the above-mentioned "keystone correction” and digital zooming and zooming functions, which can perform adaptive correction on the projected image, adjust the projected image, avoid corners or obstacles, and adjust the image to an area suitable for projection and adjust to a rectangle. That is to say, the adaptive correction integrates "keystone correction” and digital zoom scaling.
  • the information of the projection surface is collected through the image acquisition module. If the projection surface covers the corner of the wall or other objects that are not suitable for projection, such as switches and sockets , murals, hanging cabinets, etc., the projector can directly adjust the effective projection image, avoid corners or obstacles, correct the effective projection image to the most suitable projection area and adjust it into a rectangle (as shown in Figure 5).
  • the embodiments of the present application propose a projection image adjustment method, device, projector and storage medium, which can adjust the projection image and reduce the loss of brightness and image quality of the projection image .
  • the various defects existing in the above technical solutions in the prior art are the results obtained by the inventor after careful practical research. Therefore, the discovery process of the above-mentioned problems and the following examples of the present application are aimed at the above-mentioned problems.
  • the proposed solutions to the problems should all be the contributions made by the inventor to the present application in the process of realizing the present application.
  • FIG. 6 is a structural block diagram of a projector provided by an embodiment of the present application.
  • the projector 100 may include: an optical machine 110 and a control unit 120 .
  • an optical zoom module is provided in the optical machine 110 , and the optical zoom module may include components such as a motor for adjusting the position of the optical lens group in the optical machine 110 .
  • the optical zoom module may include components such as a motor for adjusting the position of the optical lens group in the optical machine 110 .
  • control unit 120 may include a memory 121, a processor 122, and the memory 121, the processor 122 and the communication interface may be directly or indirectly electrically connected to realize the connection with other electronic devices data transfer and interaction.
  • the above elements can be electrically connected to each other through buses and/or signal lines.
  • the above-mentioned memory 121 may store program instructions related to the projection screen adjustment method.
  • the processor 122 may process information and/or data related to projection picture adjustments to perform one or more functions described herein.
  • the processor 122 can execute the program instructions, acquire the selected target area, and adjust the projection image according to the above-mentioned information or data. This enables the projector 100 to adjust the projected image, thereby reducing the loss of brightness and image quality of the projected image.
  • the above-mentioned memory 121 can be, but is not limited to: a solid state hard disk (Solid State Disk, SSD), a mechanical hard disk (Hard Disk Drive, HDD), a read-only memory (Read Only Memory, ROM), a programmable read-only memory (Programmable Read-only memory). Only Memory, PROM), Erasable Programmable Read-Only Memory (EPROM), Random Access Memory (RAM), Electrical Erasable Programmable Read-Only Memory , EEPROM) etc.
  • Solid State Disk SSD
  • HDD hard disk
  • PROM Erasable Programmable Read-Only Memory
  • RAM Random Access Memory
  • EEPROM Electrical Erasable Programmable Read-Only Memory
  • the above-mentioned processor 122 can be, but not limited to: a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; also can be, but not limited to: an application specific integrated circuit (Application Specific Integrated Circuit, ASIC) ), Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Therefore, the above-mentioned processor 122 may be an integrated circuit chip with signal processing capability.
  • CPU Central Processing Unit
  • NP Network Processor
  • ASIC Application Specific Integrated Circuit
  • DSP Digital Signal Processing
  • FPGA Field-Programmable Gate Array
  • the structure of the projector 100 shown in FIG. 6 is only a schematic structure, and the projector 100 may further include more or less components or modules than the structure shown in FIG.
  • the structures shown in FIG. 6 are different configurations or configurations.
  • each component shown in FIG. 6 may be implemented by hardware, software, or a combination of both. That is, the present application does not limit the specific type and structure of the projector 100 .
  • FIG. 8 shows a flowchart of a method for adjusting a projection image provided by an embodiment of the present application.
  • the projection image adjustment method can be applied to the above-mentioned projector 100, and the projection image adjustment method may include the following steps:
  • the projector 100 when the projector 100 is running, the projector 100 can project the projection image onto the plane of the projection medium, because the projector 100 may not be facing the plane of the projection medium, and there are often existing objects on the plane of the projection medium. Due to various obstacles (eg, switches, wall decorations, etc.), in the application scenario shown in FIG. 9 , the projected image projected by the projector 100 onto the plane of the projection medium may present a trapezoid shape and cover the obstacles.
  • obstacles eg, switches, wall decorations, etc.
  • the projector 100 can obtain a selected target area suitable for projection on the plane of the projection medium according to the plane condition of the projection medium. It can be understood that, as shown in FIG. 10 , the above-mentioned selected target area may be a rectangular area in the plane of the projection medium that is unobstructed and conforms to the projection ratio selected by the user.
  • the adjustment step adjusting the projection focal length of the optical machine to change the size of the current projection area of the optical machine; correcting the effective projection image in the current projection area to change the shape of the effective projection image.
  • S220 Execute the adjustment step at least once to project the effective projection image to the selected target area.
  • S220 may include the following two feasible projection screen adjustment situations:
  • the effective projection image is projected to the selected target area by adjusting the projection focal length of the optomechanical and the shape of the effective projection image.
  • the projector 100 in this embodiment can also adjust the projection focal length of the optical machine and/or correct the effective projection image in the current projection area to convert the A valid projection image is projected to the selected target area.
  • the effective projection image is projected by using a combination of “adjusting the projection focal length of the optical machine” and “correcting the effective projection image in the current projection area”. to the selected target area.
  • adjusting the projection focal length of the opto-mechanical can ensure that the loss of brightness and image quality can be avoided when the projection image is zoomed, which is compared with the effective correction in the current projection area.
  • the combination of projection images can quickly and efficiently adjust the projection images, project the projection images to the selected target area, and reduce the loss of brightness and image quality of the projection images.
  • S220 may include the following sub-steps:
  • the first projection area includes the selected target area.
  • the projector 100 can adjust the projection focal length of the opto-mechanical 110 to zoom its current projection area to the first projection area including the selected target area.
  • the selected target area may be smaller than the current projection area, or may be larger than the current projection area
  • the first projection area may be smaller than the current projection area, or may be larger than the current projection area.
  • the projection focal length of the optomechanical 110 when the first projection area is smaller than the current projection area, you can adjust the projection focal length of the optomechanical 110 to reduce the current projection area of the optomechanical 110 to the first projection area; when the first projection area is larger than the current projection area, you can adjust the The projection focal length of the opto-mechanical 110 enlarges the current projection area of the opto-mechanical 110 to the first projection area.
  • the projector 100 can use “keystone correction” and digital zooming (ie, adaptive correction) to A valid projection image is projected to the selected target area.
  • S220A may include the following sub-steps:
  • S220A-1 Calculate the target zoom factor of the projection focal length of the optomechanical when the current projection area is zoomed to just include the selected target area.
  • the above-mentioned "exactly including the selected target area” can be understood as: including the selected target area and connecting with a boundary point of the selected target area (as shown in the first projection area in FIG. 12 ) ).
  • S220A-2 determine any multiple Z times between the target zoom factor and the current zoom factor of the optical machine.
  • S220A-3 Adjust the zoom factor of the projection focal length of the optomechanical to Z times, or adjust the zoom factor of the projection focal length of the optomechanical to the target zoom factor, so as to zoom the current projection area of the optomechanical to the first projection area.
  • the target zoom factor is the zoom factor of the optical-mechanical projection focal length when the current projection area is zoomed to just include the selected target area, therefore, as long as the zoom factor of the projection focal length of the opto-mechanical 110 does not exceed the target zoom factor , its current projection area always includes the selected target area, thereby ensuring that the current projection area of the optomechanical machine is zoomed to the first projection area including the selected target area.
  • the zoom factor of the projection focal length is adjusted to any multiple between the current zoom factor and the target zoom factor, so as to achieve the purpose of reducing the loss of brightness and image quality of the projected image.
  • the projector 100 may adjust the zoom factor of the projection focal length of the optomechanical 110 to the target zoom factor.
  • the projector 100 can adjust the projection focal length of the opto-mechanical 110 to zoom the current projection area of the opto-mechanical 110 to the first projection area that just includes the selected target area (that is, the first projection area includes the selected target area, and just circumscribes a boundary point of the selected target area).
  • the range of the zoom factor of the projection focal length of the optical-mechanical 110 of the projector 100 is limited, when the zoom factor of the projection focal length of the optical-mechanical 110 cannot be adjusted to the target zoom factor, the The zoom factor of the projection focal length of the optical machine 110 is adjusted to a limit zoom factor close to the target zoom factor.
  • the zoom range of the opto-mechanical 110 of the projector 100 is 0.4 to 1.0 (the limit zoom factors are 0.4 and 1.0 respectively), and the current zoom factor is 0.8, the opto-mechanical 110 can be The zoom factor of the projected focal length is adjusted to 0.4 (the minimum limit zoom factor).
  • the projector 100 when the projector 100 adjusts the zoom factor of the projection focal length of the optical machine 110, the projector 100 can scale the projection focal length along the projection center of the opto-mechanical 110 according to the target zoom factor and the aspect ratio of the projection, thereby realizing the current Scaling of the projected area.
  • the projector 100 can realize the adjustment of the zoom factor of the projection focal length of the optical machine 110 .
  • S220 may also include the following sub-steps:
  • S220a correcting the effective projection picture in the current projection area to project the effective projection picture into the selected inscribed rectangle;
  • the selected inscribed rectangle is the inscribed rectangle of the current projection area, and the selected inscribed rectangle and the selected target region match.
  • the largest inscribed rectangle of the current projection area of the optomechanical can be obtained; the largest inscribed rectangle matches the selected target area.
  • the largest inscribed rectangle matches the selected target area can be understood as: the aspect ratio of the largest inscribed rectangle is consistent with the selected target area, that is, the largest inscribed rectangle matches the selected target area resemblance.
  • the projector 100 can adjust the projection focal length of the opto-mechanical 110 to zoom the current projection area to the second projection area including the selected target area .
  • the selected target area may be smaller than the current projection area, or may be larger than the current projection area
  • the second projection area may be smaller than the current projection area, or may be larger than the current projection area.
  • the second projection area is smaller than the current projection area, you can adjust the projection focal length of the optomechanical 110 to reduce the current projection area of the optomechanical 110 to the second projection area; when the second projection area is larger than the current projection area, you can adjust the The projection focal length of the opto-mechanical 110 enlarges the current projection area of the opto-mechanical 110 to the second projection area.
  • S220b may include the following sub-steps:
  • S220b-1 Calculate the target zoom factor of the projection focal length of the optomechanical when the current projection area is zoomed to just include the selected target area.
  • S220b-2 Determine any multiple Z times between the target zoom factor and the current zoom factor of the optical machine.
  • S220b-3 Adjust the zoom factor of the projection focal length of the optomechanical to Z times, or adjust the zoom factor of the projection focal length of the optomechanical to the target zoom factor, so as to zoom the current projection area of the optomechanical to the second projection area.
  • S220b-1, S220b-2, and S220b-3 may refer to the foregoing S220A-1, S220A-2, and S220A-3, respectively, which will not be repeated here.
  • the method of "calculating the target zoom factor of the projection focal length of the opto-mechanical when the current projection area is zoomed to just include the selected target area” may be:
  • the coordinates of the selected target area and the coordinates of the current projection area of the optomechanical determine the transmission transformation relationship between the selected target area and the current projection area of the optomechanical
  • the target zoom area includes the selected target area and is connected to a boundary point of the selected target area;
  • S200 may include the following sub-steps:
  • the feature data of the projection plane can be acquired through the image acquisition module of the projector 100 .
  • the image acquisition module may include a camera module or other depth information measurement modules, such as TOF (time-of-flight, time-of-flight) modules, etc., through the image acquisition module to obtain image information and position information of the image projected by the optical machine 110 And the three-dimensional information of the projection surface, etc., and then fuse the obtained information to calculate the relevant parameters of image correction. And use the image correction related parameters to calculate the projected 3D point cloud information, image segmentation information, and screen coordinate information, so as to obtain the plane area, plane equation and contour (ie, feature data) suitable for projection.
  • TOF time-of-flight, time-of-flight
  • the projection plane is segmented according to the feature data, and an area suitable for projection without obstacles is identified in the segmented area as an unobstructed area.
  • the selected target area is the largest inscribed rectangle in the barrier-free area that conforms to the preset projection ratio.
  • the largest inscribed rectangle that meets the user's projection ratio (for example, 16:9, etc.) requirement can be determined based on this area.
  • an embodiment of the present application further provides another method for adjusting a projection image.
  • FIG. 21 shows a flowchart of another method for adjusting a projection image provided by an embodiment of the present application.
  • the projection image adjustment method can be applied to the above-mentioned projector 100, and the projection image adjustment method may include the following steps:
  • this method uses a combination of "adjusting the projection focal length of the optical machine” and "correcting the effective projection image in the current projection area” to project the effective projection image to the selected target area.
  • the adjustment of the projection focal length of the optomechanical can ensure that the loss of brightness and image quality can be avoided when the projection image is zoomed and zoomed, and it is compared with the correction of the effective projection image in the current projection area.
  • the combination of the method can realize the adjustment of the projection image quickly and efficiently, project the projection image to the selected target area, and reduce the loss of the brightness and image quality of the projection image.
  • S410 may include: calculating the current When the projection area is zoomed to just include the selected target area, the target zoom factor of the projection focal length of the optomechanical; determine any multiple Z times between the target zoom factor and the current zoom factor of the optomechanical; zoom the projection focal length of the optomechanical Adjust the magnification to Z times, or adjust the zoom factor of the projection focal length of the optomechanical to the target zoom factor, so as to zoom the current projection area of the optomechanical to the first projection area.
  • the method of "calculating the target zoom factor of the optical-mechanical projection focal length when the current projection area is zoomed to just include the selected target area” can be: according to the coordinates of the selected target area and the coordinates of the current projection area of the opto-mechanical, determine The transmission transformation relationship between the selected target area and the current projection area of the optomechanical; the pixel correspondence between the selected target area and the current projection area is determined according to the transmission transformation relationship; the target zoom area is determined according to the pixel correspondence, and the target zoom area includes the selected The target area is connected to a boundary point of the selected target area; the multiple relationship between the current projection area and the target zoom area is taken as the target zoom factor.
  • the projection screen adjustment method may further include: acquiring feature data of the projection plane; acquiring a barrier-free area on the projection plane according to the feature data; acquiring a selected target area in the barrier-free area; selecting the target area as a barrier-free area The largest inscribed rectangle that matches the preset throw ratio.
  • an embodiment of the present application also provides another method for adjusting a projection image.
  • FIG. 22 shows a flowchart of another method for adjusting a projection image provided by an embodiment of the present application.
  • the projection image adjustment method can be applied to the above-mentioned projector 100, and the projection image adjustment method may include the following steps:
  • S510 correcting the effective projection picture in the current projection area of the optical machine, so as to project the effective projection picture into the selected inscribed rectangle;
  • the selected inscribed rectangle is the inscribed rectangle of the current projection area, and the selected inscribed rectangle is the same as the selected inscribed rectangle.
  • this method uses a combination of "adjusting the projection focal length of the optical machine” and "correcting the effective projection image in the current projection area” to project the effective projection image to the selected target area.
  • the adjustment of the projection focal length of the optomechanical can ensure that the loss of brightness and image quality can be avoided when the projection image is zoomed and zoomed, and it is compared with the correction of the effective projection image in the current projection area.
  • the combination of the method can realize the adjustment of the projection image quickly and efficiently, project the projection image to the selected target area, and reduce the loss of the brightness and image quality of the projection image.
  • S520 may include: calculating the current When the projection area is zoomed to just include the selected target area, the target zoom factor of the projection focal length of the optomechanical; determine any multiple Z times between the target zoom factor and the current zoom factor of the optomechanical; zoom the projection focal length of the optomechanical Adjust the magnification to Z times, or adjust the zoom factor of the projection focal length of the optomechanical to the target zoom factor, so as to zoom the current projection area of the optomechanical to the first projection area.
  • the method of "calculating the target zoom factor of the optical-mechanical projection focal length when the current projection area is zoomed to just include the selected target area” can be: according to the coordinates of the selected target area and the coordinates of the current projection area of the opto-mechanical, determine The transmission transformation relationship between the selected target area and the current projection area of the optomechanical; the pixel correspondence between the selected target area and the current projection area is determined according to the transmission transformation relationship; the target zoom area is determined according to the pixel correspondence, and the target zoom area includes the selected The target area is connected to a boundary point of the selected target area; the multiple relationship between the current projection area and the target zoom area is taken as the target zoom factor.
  • the projection screen adjustment method may further include: acquiring feature data of the projection plane; acquiring a barrier-free area on the projection plane according to the feature data; acquiring a selected target area in the barrier-free area; selecting the target area as a barrier-free area The largest inscribed rectangle that matches the preset throw ratio.
  • an embodiment of the present application also provides another method for adjusting a projection image.
  • FIG. 23 shows a flowchart of another method for adjusting a projection image provided by an embodiment of the present application.
  • the projection image adjustment method can be applied to the above-mentioned projector 100, and the projection image adjustment method may include the following steps:
  • S610 adjust the projection focal length of the optomechanical to project the effective projection image to the selected target area; or, adjust the projection focal length of the optomechanical to change the size of the current projection area of the optomechanical, and correct the original projection area of the optomechanical to change the shape of the effective projection image, so that the effective projection image is projected to the selected target area.
  • the still another projection image adjustment apparatus 900 may include: an acquisition module 910 and an adjustment module 920 .
  • the above modules may be stored in a memory or solidified in the projector 100 provided by the present application in the form of software or firmware (Firmware), and may be executed by a processor in the projector 100 . Meanwhile, data required to execute the above-mentioned modules, codes of programs, and the like may be stored in the memory.
  • the acquisition module 910 can be used to support the projector 100 to perform the above-mentioned S600, etc., and/or other processes used in the techniques described herein, eg, S200A to S200C;
  • the adjustment module 920 can be used to support the projector 100 Perform S610, etc. above, and/or other processes for the techniques described herein, eg, S220A, S220B, S220A-1 to S220A-3, S220a to S220c, S220b-1 to S220b-3.
  • embodiments of the present application further provide a storage medium, where a computer program is stored thereon, and the computer program executes the steps of the foregoing projection image adjustment method when the computer program is run by a processor.
  • the storage medium can be a general storage medium, such as a removable disk, a hard disk, etc.
  • the above-mentioned projection image adjustment method can be executed, so as to solve the problem of "currently, the projector can use the adaptive adjustment method, Adjust the projection screen, avoid corners or obstacles, adjust the screen to an area suitable for projection and adjust it into a rectangle. It is essentially an adjustment at the expense of reducing the brightness and image quality of the projected screen.
  • the adjustment of the projection screen is for the purpose of reducing the loss of brightness and image quality of the projection screen.
  • the projection image adjustment method, device, projector and storage medium use a combination of "adjusting the projection focal length of the optical machine" and "correcting the effective projection image in the current projection area” to project the effective projection image to the selected target area.
  • adjusting the projection focal length of the opto-mechanical can ensure that the loss of brightness and image quality can be avoided when the projection image is zoomed, which is compared with the effective correction in the current projection area.
  • the combination of projection images can quickly and efficiently adjust the projection images, project the projection images to the selected target area, and reduce the loss of brightness and image quality of the projection images.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

Sont divulgués ici un procédé et un appareil de réglage d'un écran de projection, un projecteur et un support de stockage se rapportant au domaine des projecteurs. Le procédé comprend les étapes consistant : à obtenir une zone cible sélectionnée (S200); une étape de réglage consistant : à régler une longueur focale de projection d'un moteur lumière afin de modifier la taille de la zone de projection actuelle du moteur lumière; à corriger un écran de projection effective dans la zone de projection actuelle pour modifier la forme de l'écran de projection effective (S210); et à exécuter au moins une fois l'étape de réglage pour projeter l'écran de projection effective sur la zone cible sélectionnée (S220). Le réglage de la longueur focale de projection du moteur lumière permet d'éviter la perte de luminosité et la perte de qualité des images lors de la variation focale de l'écran projeté. Ainsi, la combinaison du mode de réglage avec le mode de correction de l'écran de projection effective dans la zone de projection actuelle permet de régler rapidement et efficacement l'écran de projection, de projeter l'écran de projection sur la zone cible sélectionnée, et de réduire la perte de luminosité et la perte de qualité des images de l'écran de projection.
PCT/CN2021/106993 2020-09-28 2021-07-19 Procédé et appareil de réglage d'écran de projection, projecteur et support de stockage WO2022062604A1 (fr)

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