A 720-degree dome display method and system incorporating a floor screen

Abstract

This invention relates to the field of panoramic display device technology, specifically to a 720-degree dome display method and system combined with a ground screen. The method includes: constructing a system coordinate system for the dome display system; performing a first mapping optimization on the dome based on the system coordinate system to obtain a first mapping algorithm; performing a second mapping optimization on the ground screen to obtain a second mapping algorithm; and performing a connection optimization on overlapping areas to obtain a connection area calibration algorithm. Addressing the problem of insufficient immersion in existing whole-dome panoramic devices, this invention replaces the traditional whole-dome stitching scheme with a ground screen combined with a dome. By cropping the dome from the ground screen and mapping corresponding images to corresponding positions on the ground screen, it replaces the traditional lower hemisphere and corridor, providing both display and walking functions. Furthermore, a fusion algorithm is used for seamless display of the transition area between the dome and the ground screen, improving the overall immersive experience.

Description

Technical Field

[0001] This invention relates to the field of panoramic display device technology, and more specifically to a 720-degree dome display method and system that combines a ground screen. Background Technology

[0002] A dome screen is a new type of display technology centered on a spherical screen, achieving panoramic image coverage of 360 degrees or even greater angles through curved projection or curved screens. An LED dome theater refers to a system that uses multiple LED screens spliced ​​together at specific angles to form a spherical screen on a large scale to provide panoramic displays.

[0003] The common presentation methods of LED dome theaters mainly include the following four types: Dome type: This type of dome theater has a dome-shaped dome structure, installed directly above the audience area, forming a spherical screen covering the upper half of the space. Audiences sit in horizontally positioned seats below the dome, viewing the images displayed on the screen from a downward angle, primarily focusing on the upper half of the dome's imagery.

[0004] Inclined: The dome is set at an angle to the side and above the audience area, forming a certain angle with the horizontal direction. The audience sits in seats set on the slope, and their line of sight is adapted to the inclined dome, so as to watch the images presented on the dome from the side and above.

[0005] Vertical: The dome screen is set up vertically, typically mounted vertically on one wall of an enclosed space. Audience seating is arranged vertically, and viewers sit in these movable seats to view the vertically set dome image from a horizontal perspective.

[0006] 720-degree full-spherical projection: The entire dome forms a complete sphere, and the audience walks on a suspended glass walkway inside the dome, which is fixed to the inner wall of the dome by multiple metal beams and suspension cables. The audience views the complete 720-degree dome image through the surrounding dome.

[0007] However, in actual implementation, the inventors discovered that the traditional dome-type, tilted-type, and vertical-type dome theater presentation methods have the problem of being unable to present a complete spherical VR image. This is because their dome setup only covers a portion of the space (the upper half, the upper side, or the vertical direction), causing viewers to only see a part of the dome image from a specific perspective, failing to create an immersive experience of the entire spherical space. While the 720-degree full-sphere type achieves panoramic display by splicing two hemispheres, it is limited by the structure of the suspended corridor, significantly restricting the movement of viewers and performers, and the supporting frame significantly affects the display effect. Summary of the Invention

[0008] In view of the above-mentioned problems in the prior art, a 720-degree dome display method combining a ground screen is provided; on the other hand, a system for implementing such a solution is also provided.

[0009] The specific technical solution is as follows: A 720-degree dome display method combined with a ground screen, applicable to a dome display system, wherein the dome display system includes a ground screen and a dome screen inverted above the ground screen; the dome display method includes: Step S1: Constructing a system coordinate system for the dome display system; the system coordinate system is a spherical coordinate system used for projecting panoramic images; Step S2: Performing a first mapping optimization on the dome screen according to the system coordinate system to obtain a first mapping algorithm, and performing a second mapping optimization on the ground screen to obtain a second mapping algorithm; Step S3: Performing cylindrical projection mapping according to the system coordinate system to obtain the overlapping area of ​​the dome screen and the ground screen, and performing a connection optimization on the overlapping area to obtain a connection area calibration algorithm; Step S4: Controlling the dome display system to display based on the first mapping algorithm, the second mapping algorithm, and the connection area calibration algorithm.

[0010] On the other hand, in step S1, the system coordinate system is a spherical coordinate system; the longitude of the system coordinate system... Using the horizontal plane passing through the origin as a reference, the due east direction is... Counterclockwise rotation is the positive direction, range The latitude of the system coordinate system Using the plumb line from the origin as a reference, the top of the dome is... The center of the ground is The equatorial plane is To form a vertical perspective .

[0011] On the other hand, in step S2, the first mapping optimization process for the dome screen includes: step A21: correcting the geometric mapping relationship of the dome screen to obtain the dome screen correspondence; step A22: optimizing the pixel mapping algorithm of the dome screen to obtain the dome screen pixel mapping equation; step A23: using the dome screen correspondence and the dome screen pixel mapping equation as the output of the first mapping algorithm.

[0012] On the other hand, in step S2, the dome correspondence includes: aligning the top vertex of the dome's center directly above the top line of the panoramic image; aligning the equator of the dome with the vertical midline of the panoramic image; aligning the bottom edge of the dome along the latitude line with the dome display boundary of the panoramic image, wherein the dome display boundary is determined according to the height of the dome.

[0013] On the other hand, in step S2, the dome pixel mapping equation includes: ;

[0014] In the formula, ( ) represents the image coordinates of the panoramic image. Let the coordinates of the dome be the dome coordinates. The resolution of the panoramic image is given.

[0015] On the other hand, in step S2, the second mapping optimization process for the ground screen includes: step B21: aligning the display center of the ground screen with the south pole of the system coordinate system and sharing a vertical line with the center of the dome screen; step B22: converting the screen rectangular coordinates of the ground screen into polar coordinate radii, and constructing a latitude mapping formula in combination with the system coordinate system as the output of the second mapping algorithm.

[0016] On the other hand, the polar coordinate radius is: ; The latitude mapping formula includes: ; In the formula, ( ( ) represents the polar coordinates of the ground screen after conversion to polar coordinates. The screen's rectangular coordinates are... The distance from the ground point to the center of the circle. The projection radius of the parallels of latitude corresponding to the boundary of the dome screen display. Display the boundaries of the dome screen. and It exhibits a linear proportion.

[0017] On the other hand, in step S3, the joint region calibration algorithm includes: When pixels At that time, the display height of the pixel on the dome screen is ; When the pixels displayed on the ground screen At that time, the display height of the pixel on the dome screen is ; In the formula, ( ( ) represents the polar coordinates of the ground screen after conversion to polar coordinates. The screen's rectangular coordinates are... The distance from the ground point to the center of the circle. The projection radius of the parallels of latitude corresponding to the boundary of the dome screen display. Display the boundaries of the dome screen. and It exhibits a linear proportion.

[0018] A 720-degree dome display system is provided for implementing the above-described 720-degree dome display method. The 720-degree dome display system includes a spliced ​​dome screen and a ground screen. The ground screen is circular, and the dome screen is spherical with its lower half cut off by the ground screen.

[0019] The above technical solution has the following advantages or beneficial effects: Addressing the issue that existing spherical panoramic devices are easily limited by their suspended structures, resulting in a weak sense of immersion, this solution replaces the traditional spherical splicing scheme with a combination of a ground screen and a dome screen. By capturing the dome screen from the ground screen and mapping corresponding images onto the ground screen at the corresponding positions, it replaces the traditional lower hemisphere and corridor, providing both display and walking functions. Furthermore, a fusion algorithm is used for display, seamlessly displaying the transition area between the dome screen and the ground screen, thus improving the overall immersive experience. Attached Figure Description

[0020] Embodiments of the invention will be described more fully with reference to the accompanying drawings. However, the drawings are for illustration and explanation only and do not constitute a limitation on the scope of the invention.

[0021] Figure 1 This is an overall schematic diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram showing the method in an embodiment of the present invention; Figure 3 This is a schematic diagram of a spherical coordinate system in an embodiment of the present invention; Figure 4 This is a mapping diagram in an embodiment of the present invention; Figure 5 This is a schematic diagram of the first mapping process in an embodiment of the present invention; Figure 6 This is a schematic diagram of the second mapping process in an embodiment of the present invention; Figure 7 This is a schematic diagram of the panoramic screen in an embodiment of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0025] The present invention includes: a 720-degree dome display method combined with a ground screen, applicable to a dome display system, the dome display system including a ground screen 102 and a dome 101 inverted above the ground screen; the radius dimensions of the ground screen 102 and the dome 101 are matched, and geometrically the ground screen 102 is a circular screen parallel to the equatorial plane of the dome and truncating the dome 101 at a lower latitude.

[0026] Both the ground screen 102 and the dome screen 101 are formed by splicing multiple LED screens. The ground screen 102 has a support 103 underneath.

[0027] like Figure 2 As shown, the dome display method includes: Step S1: Constructing a system coordinate system for the dome display system; the system coordinate system is a spherical coordinate system used to project panoramic images; Step S2: Performing a first mapping optimization on the dome based on the system coordinate system to obtain a first mapping algorithm, and performing a second mapping optimization on the ground screen to obtain a second mapping algorithm; Step S3: Performing cylindrical projection mapping based on the system coordinate system to obtain the overlapping area between the dome and the ground screen, and performing connection optimization on the overlapping area to obtain a connection area calibration algorithm; Step S4: Controlling the dome display system to display based on the first mapping algorithm, the second mapping algorithm, and the connection area calibration algorithm.

[0028] Specifically, addressing the issue that existing spherical panoramic devices are easily limited by their suspended structures, resulting in a weak sense of immersion, this solution replaces the traditional spherical splicing method with a combination of a ground screen and a dome screen. By capturing the dome screen from the ground screen and mapping corresponding images onto the ground screen at the corresponding locations, the traditional lower hemisphere and corridor are replaced. This provides both display and walking functionality, and a fusion algorithm ensures seamless display of the transition area between the dome screen and the ground screen, enhancing the overall immersive experience.

[0029] Specifically, the above-mentioned display method is mainly configured as a software embodiment in computer equipment, such as in the control system of a dome display system, to synchronously control the dome and the ground screen to display panoramic images.

[0030] Panoramic images refer to display content that needs to be presented to the viewer from a 720-degree panoramic perspective, including pictures, animations, and films. Ideally, panoramic images, after being stitched together, are displayed in a spherical coordinate system. Figure 3 This illustrates a typical spherical coordinate system, whose coordinates are ( ( ), which correspond to the longitude and latitude of the sphere, respectively.

[0031] However, in the actual image production process, to facilitate computer processing and editing, a two-dimensional image is usually converted into coordinates in a spherical coordinate system through a specific projection method for display. This solution selects a VR panoramic image using standard 2:1 equirectangular projection to achieve a better conversion effect.

[0032] Based on the above transformation process, it is possible to project a two-dimensional panoramic image onto a spherical coordinate system.

[0033] To enable the corresponding projection operation to be performed on the actual display device, a system coordinate system is first constructed for the dome screen system.

[0034] For ease of construction, longitude (azimuth φ) is usually defined as follows: with the horizontal plane passing through the origin as the reference, the due east direction is... Counterclockwise rotation is the positive direction, range .

[0035] latitude Using the plumb line from the origin as a reference, the apex of the dome (North Pole) is... The center of the Earth's surface (the South Pole) is The equatorial plane (perpendicular to the plumb line) is To form a vertical perspective A complete spherical coordinate system. The larger the value, the closer it is to the dome. Corresponding to the center of the ground.

[0036] In the system coordinate system, such as Figure 4 As shown, the mapping process for panoramic images includes: using a standard 2:1 equirectangular projection VR panoramic image.

[0037] Image width Vertical pixel coordinates with latitude Positive linear correspondence: Corresponding to the South Pole at the center of the Earth's surface ( (bottom of the image) Corresponding to the equator ( (Image center line); Corresponding to the North Pole of the dome ( (The top of the image) means that the higher up the image, the higher the corresponding latitude.

[0038] by O is the origin of the pixel coordinate system, and its longitude is... Mapped to the horizontal pixel coordinate X-axis, latitude Mapped to the vertical pixel coordinate Y-axis, any dimension The corresponding Y-coordinate is: .

[0039] Based on the above, optimizations can be made for both the dome screen and the ground screen to achieve better display effects. Specifically: In one embodiment, in step S1, the system coordinate system is a spherical coordinate system; the longitude φ of the system coordinate system is based on the horizontal plane passing through the origin, with the due east direction being... Counterclockwise rotation is the positive direction, range The latitude θ of the system coordinate system is based on the vertical line from the origin, with the top of the dome as the reference point. The center of the ground is The equatorial plane is To form a vertical perspective .

[0040] Specifically, in order to achieve better construction results, in this embodiment, the horizontal plane passing through the origin is used as the reference, and the due east direction is set as the azimuth angle of zero degrees to achieve better calibration results, and the top of the dome is set to 180 degrees for matching.

[0041] In one embodiment, such as Figure 5 As shown, in step S2, the first mapping optimization process for the dome screen includes: step A21: correcting the geometric mapping relationship of the dome screen to obtain the dome screen correspondence; step A22: optimizing the pixel mapping algorithm of the dome screen to obtain the dome screen pixel mapping equation; step A23: using the dome screen correspondence and the dome screen pixel mapping equation as the output of the first mapping algorithm.

[0042] Specifically, for different types of dome screens, in order to achieve better display effects, this embodiment first combines the display coordinate system of the spliced ​​dome screen itself to correct the geometric mapping relationship between the panoramic image and the dome screen; on this basis, the pixel mapping algorithm of the dome screen is optimized to obtain the dome screen pixel mapping equation.

[0043] Based on the above two points, a better mapping effect can be achieved.

[0044] In one embodiment, step S2 includes aligning the dome screen correspondence with: aligning the top vertex of the dome screen directly above the center of the dome screen with the top line of the panoramic image; aligning the equator of the dome screen with the vertical center line of the panoramic image; and aligning the bottom edge of the dome screen with the latitude line of the panoramic image, wherein the dome screen display boundary is determined according to the height of the dome screen.

[0045] Specifically, let the dome screen display boundary be... Example value For the lower edge of the physical dome, during the geometric alignment process, the vertex directly above the center of the dome is aligned with the top line of the panoramic image, the equator of the dome is aligned with the vertical center line of the panoramic image, and the latitude line of the lower edge of the dome is aligned with the dome display boundary of the panoramic image, which forms a circular boundary with radius R when projected on the ground.

[0046] The mapping range then covers the latitude range. Corresponding to the vertical region of the VR2:1 image. in (when hour, ).

[0047] In one embodiment, step S2, the dome pixel mapping equation includes: ; In the formula, ( () represents the image coordinates of the panoramic image. The coordinates of the dome screen are the dome screen coordinates. This represents the resolution of the panoramic image, i.e., width × height.

[0048] It is also defined as follows: : Horizontal pixel coordinates of the panoramic image ; Vertical pixel coordinates of the panoramic image .

[0049] In one embodiment, such as Figure 6 As shown, in step S2, the second mapping optimization process for the ground screen includes: step B21: aligning the display center of the ground screen with the south pole of the system coordinate system and sharing a vertical line with the center of the dome screen; step B22: converting the rectangular coordinates of the ground screen into polar coordinate radii, and constructing a latitude mapping formula in combination with the system coordinate system as the output of the second mapping algorithm.

[0050] In one embodiment, the polar coordinate radius is:

[0051] Latitude mapping formulas include: ; In the formula, ( ( ) represents the polar coordinates of the ground screen after conversion to polar coordinates. Using screen rectangular coordinates, The distance from the ground point to the center of the circle. The projection radius of the parallels of latitude corresponding to the boundary of the dome screen display. To display the boundaries of the dome screen, and It exhibits a linear proportion.

[0052] In one embodiment, step S3, the joint region calibration algorithm includes: When pixels At that time, the display height of this pixel on the dome screen is ; When the pixels displayed on the ground screen At that time, the display height of this pixel on the dome screen is ; In the formula, ( ( ) represents the polar coordinates of the ground screen after conversion to polar coordinates. Using screen rectangular coordinates, The distance from the ground point to the center of the circle. The projection radius of the parallels of latitude corresponding to the boundary of the dome screen display. To display the boundaries of the dome screen, and It exhibits a linear proportion.

[0053] Specifically, in order to achieve a better boundary blending effect, in this embodiment, the pixels in the connecting area are first identified.

[0054] Among them, for the pixels after panoramic image mapping ( ),when When, it indicates that the pixel is located at the edge of the dome in terms of viewing angle; and, when When the pixel is at the outermost edge of the ground screen in terms of viewing angle, it indicates that the pixel is located at the outermost edge of the ground screen.

[0055] At this point, the pixel is considered to be in the transition region.

[0056] For this type of pixel, its display height on the dome screen is controlled to be... And make the longitude of the dome screen and the ground screen... and latitude This achieves spatial coordinate alignment.

[0057] Further calibration can be performed based on this. Calibration standards include: radial meridians (fixed longitude). ) and concentric parallels ( Deviation < 0.5 pixels (8K resolution).

[0058] A 720-degree dome screen 101 display system is provided for implementing the above-described 720-degree dome screen 101 display method. The 720-degree dome screen 101 display system includes a spliced ​​dome screen 101 and a ground screen 102. The ground screen 102 is circular, and the dome screen 101 is spherical with its lower half cut off by the ground screen 102.

[0059] Specifically, to achieve a better display effect, the following scheme can be used to construct the dome 101: Use a spherical curved LED screen with a diameter of ≥1 / 2 sphere, and set the lower edge along the latitude line as... (For example, the lower edge is located at the 60° latitude line).

[0060] The screen is supported by a curved metal frame, which seamlessly splices multiple flexible LED modules to form a spherical structure.

[0061] The lower edge of the dome screen 101 is a horizontal latitude line, which facilitates its alignment with the ground screen 102. Seamless splicing is achieved to form a θ60° dome LED spherical screen.

[0062] Furthermore, the ground screen 102 is composed of multiple rectangular high-strength load-bearing LED modules (such as resin-encapsulated LED modules with a load-bearing capacity of ≥1000kg / ㎡). The area of ​​the ground screen 102 is larger than the circular projection area of ​​the dome screen 101 from above, ensuring that it can completely support the area below the dome screen 101. The image area.

[0063] By eliminating the suspended corridor, the ground screen 102 directly supports personnel movement, fundamentally eliminating the problem of frame obstruction. Simultaneously, the surface of the ground screen 102 module can be coated with a transparent, non-slip, and wear-resistant coating with a friction coefficient ≥0.6, effectively improving safety and preventing slips and other accidents while ensuring free movement for personnel.

[0064] The ground screen 102 module can be coated with a transparent anti-slip and wear-resistant coating (friction coefficient ≥0.6, in compliance with GB / T 4100—2015 standard) to improve safety.

[0065] The arc line projected onto the ground screen 102 from the lower edge of the dome screen 101 (latitude line) forms the boundary of the display area.

[0066] When the lower edge of the dome screen 101 is at 60° latitude, the circular display area generated by the lower edge of the latitude mapped onto the ground screen 102.

[0067] In some embodiments, for ease of construction, the portion below the equatorial plane of the dome screen 101 but not yet captured by the plane of the dome screen 101 is replaced with an annular plane. This annular screen has no tilt angle relative to the horizontal plane in space, but its mapping process still follows the projection process described above.

[0068] Taking the embodiment with only the dome screen 101 as an example: In this embodiment, such as Figure 1 As shown, the dome 101 has a diameter of 15 meters, and the dome 101 displays the boundary. .

[0069] Hardware structure: Dome 101: Utilizing a metal frame to support multiple flexible LED modules (7.5-meter radius of curvature), these modules are seamlessly joined into a spherical shape using precision splicing technology. The bottom edge is a horizontal straight line, located at 60° latitude. (Corresponding VR image) (When H=8192, (≈2731 pixels). The metal frame is supported on the building floor outside the range of the ground LED screen, ensuring the frame is stable and does not affect the ground screen 102 area. The lower edge of the dome screen 101 is closely connected to the ground screen 102 on the same horizontal plane, with a splicing seam ≤0.3mm, ensuring a smooth image transition without obvious gaps.

[0070] Ground screen 102: Utilizing 2876 LED modules, each measuring 0.25m x 0.25m (with a load-bearing capacity ≥1000kg / ㎡), forming a circle with a diameter of 14.15m (projection circle diameter 14.15m). A steel mesh structure is laid beneath, bolted to the building's ground to enhance the load-bearing capacity and stability of ground screen 102.

[0071] In terms of signal processing, the server divides the panoramic VR source (resolution 16384×8192) into spherical coordinates, and displays it on the dome screen. Ground screen display This ensures that the image is accurately mapped to the corresponding screen area.

[0072] when At that time, the Y=2731 pixels of the dome and the ground were completely consistent, and the image had no breaks.

[0073] like Figure 7 As shown, an embodiment with a panoramic screen is used as an example: The dome screen 101 has a diameter of 15 meters.

[0074] Dome 101: Also constructed with a metal frame supporting multiple flexible LED modules (7.5-meter radius of curvature), seamlessly spliced ​​into a hemispherical shape. Below the equator, Dome 101 forms a ring screen 104 with the same diameter as the equator. Ring screen 104 is composed of multiple rectangular flexible LED modules seamlessly spliced ​​together, supported by a metal frame. An aluminum alloy frame supports the building's ground outside the area of ​​the ground screen 102. The lower edge of ring screen 104 is closely connected to the ground screen 102 on the same horizontal plane, with a splicing seam ≤0.3mm, ensuring tight screen connection and image continuity.

[0075] Ground screen 102: It uses 2929 LED modules, each measuring 0.25 meters × 0.25 meters (with a load-bearing capacity ≥ 1000 kg / m²), forming a circle with a diameter of 15 meters (projection circle diameter 15 meters). A steel structure grid is laid underneath and fixed to the building ground with bolts to ensure the load-bearing capacity and stability of ground screen 102.

[0076] Signal processing: For example, the server divides the panoramic VR source (resolution 16384×8192) into spherical coordinates and displays it on a hemispherical dome screen. ,correspond ; Circular screen display ,correspond Ground screen display ,correspond To achieve accurate presentation of VR images on different screen areas.

[0077] The above technical solution has the following technical effects: 1. Technical effects: Complete image coverage: VR 2:1 images mapped via a dome (e.g., a dome-led spherical screen). , VR 2:1 image mapped to the ground (e.g., a ground-based LED screen). Seamless splicing achieves a 720-degree spherical image with 360° horizontal × 360° vertical coverage. Actual testing shows that the blind spot is ≤0.1%, providing viewers with a comprehensive and immersive visual experience without blind spots.

[0078] 2. Free space for movement: Audiences and performers can sit or lie down on the ground LED screen inside the dome to watch movies or engage in various activities without being restricted by the suspended structure. The ground screen has a load-bearing capacity of ≥1000kg / ㎡. Based on an activity space of 1㎡ per person, it can support 100 people standing densely in 100㎡. Compared with traditional whole-spherical domes (which occupy space due to suspended corridors), the activity area is more than twice as large, greatly improving space utilization and the flexibility of personnel activities.

[0079] 3. Low visual interference: By eliminating complex structures such as suspended glass corridors and reducing obstructions to the view from supporting frames and borders, viewers can enjoy an unobstructed visual experience, immersing themselves in a complete spherical VR image space. The effective viewing angle is close to 100%, significantly improving the viewing quality.

[0080] 4. Socioeconomic effects: Application scenarios expanded: Suitable for cinemas, science and technology museums, virtual press conferences, etc., the number of people accommodated per session is 50% larger than that of traditional dome screens, which can meet the needs of more audiences watching movies at the same time; in science and technology museums and virtual press conferences, it can provide more attractive exhibition and event spaces, bringing a brand-new experience mode to different fields.

[0081] Cost advantages: Eliminating the suspended structure reduces construction costs by 30%, mainly due to the reduction in special structural design, material procurement, and installation costs for the suspended walkway; maintenance costs are reduced by 40% because complex maintenance work such as load-bearing testing is no longer required, thus reducing operating costs and improving economic efficiency.

[0082] Social Benefits: At the societal level, this invention provides audiences with a higher quality and more immersive viewing experience, enriching people's cultural and entertainment lives and promoting technological innovation in the film and entertainment industry. Simultaneously, it provides new application scenarios for related industries such as advertising and exhibitions, promoting cross-industry integration and development, and possesses broad market prospects and social value.

[0083] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for displaying a 720-degree dome screen in conjunction with a ground screen, characterized in that, Suitable for dome display systems, the dome display system comprising a ground screen and a dome screen inverted above the ground screen; The dome display method includes: Step S1: Constructing a system coordinate system for the dome display system; the system coordinate system is a spherical coordinate system used for projecting panoramic images; Step S2: Performing a first mapping optimization on the dome based on the system coordinate system to obtain a first mapping algorithm, and performing a second mapping optimization on the ground screen to obtain a second mapping algorithm; Step S3: Performing cylindrical projection mapping based on the system coordinate system to obtain the overlapping area of ​​the dome and the ground screen, and performing a connection optimization on the overlapping area to obtain a connection area calibration algorithm; Step S4: Controlling the dome display system to display based on the first mapping algorithm, the second mapping algorithm, and the connection area calibration algorithm.

2. The 720-degree dome display method according to claim 1, characterized in that, In step S1, the system coordinate system is a spherical coordinate system; the longitude of the system coordinate system... Using the horizontal plane passing through the origin as a reference, the due east direction is... Counterclockwise rotation is the positive direction, range The latitude of the system coordinate system Using the plumb line from the origin as a reference, the top of the dome is... The center of the ground is The equatorial plane is To form a vertical perspective .

3. The 720-degree dome display method according to claim 1, characterized in that, In step S2, the first mapping optimization process for the dome screen includes: step A21: correcting the geometric mapping relationship of the dome screen to obtain the dome screen correspondence; step A22: optimizing the pixel mapping algorithm of the dome screen to obtain the dome screen pixel mapping equation; step A23: using the dome screen correspondence and the dome screen pixel mapping equation as the output of the first mapping algorithm.

4. The 720-degree dome display method according to claim 3, characterized in that, In step S2, the dome correspondence includes: aligning the top vertex of the dome's center with the top line of the panoramic image; aligning the equator of the dome with the vertical midline of the panoramic image; and aligning the bottom edge of the dome along the latitude line with the dome display boundary of the panoramic image, wherein the dome display boundary is determined according to the height of the dome.

5. The 720-degree dome display method according to claim 3, characterized in that, In step S2, the dome pixel mapping equation includes: ； In the formula, The image coordinates of the panoramic image are: Let the coordinates of the dome be the dome coordinates. The resolution of the panoramic image is given.

6. The 720-degree dome display method according to claim 1, characterized in that, In step S2, the second mapping optimization process for the ground screen includes: step B21: aligning the display center of the ground screen with the south pole of the system coordinate system and sharing a vertical line with the center of the dome screen; step B22: converting the screen rectangular coordinates of the ground screen into polar coordinate radii, and constructing a latitude mapping formula in combination with the system coordinate system as the output of the second mapping algorithm.

7. The 720-degree dome display method according to claim 6, characterized in that, The polar coordinate radius is: ； The latitude mapping formula includes: ； In the formula, ( ( ) represents the polar coordinates of the ground screen after conversion to polar coordinates. The screen's rectangular coordinates are... The distance from the ground point to the center of the circle. The projection radius of the parallels of latitude corresponding to the boundary of the dome screen display. Display the boundaries of the dome screen. It is linearly proportional to r.

8. The 720-degree dome display method according to claim 7, characterized in that, In step S3, the joint region calibration algorithm includes: When the pixel At that time, the display height of the pixel on the dome screen is ; When the pixels displayed on the ground screen At that time, the display height of the pixel on the dome screen is ; In the formula, ( ( ) represents the polar coordinates of the ground screen after conversion to polar coordinates. The screen's rectangular coordinates are... The distance from the ground point to the center of the circle. The projection radius of the parallels of latitude corresponding to the boundary of the dome screen display. Display the boundaries of the dome screen. and It exhibits a linear proportion.

9. A 720-degree dome display system, characterized in that, This system is used to implement the 720-degree dome display method according to claims 1-8; the 720-degree dome display system includes a spliced ​​dome and a ground screen; the ground screen is circular, and the dome is spherical with its lower half cut off by the ground screen.

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