CN112529769A - Method and system for adapting two-dimensional image to screen, computer device and storage medium - Google Patents
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Abstract
The invention relates to a method and a system for adapting a two-dimensional image to a screen, a computer device and a storage medium, wherein the method comprises the following steps: determining a view cone visual field range of the camera according to a set position of the camera and a view field angle of the camera, wherein the set position of the camera is a position relative to a screen, and the view cone visual field range is a quadrangular frustum and comprises a near plane and a far plane; acquiring the size of a two-dimensional image; determining the target position according to the size of the far plane and the size of the two-dimensional image; moving the two-dimensional image to the target location to flood the screen with the two-dimensional image. The method and the device have the advantages that the two-dimensional image can be filled with the screen after being moved to the target position, the process is simple, the calculated amount is small, and the two-dimensional image can be quickly adapted to the three-dimensional scene.
Description
Technical Field
The present invention relates to the field of large screen visualization, and more particularly, to a method and system for adapting a two-dimensional image to a screen, a computer device, and a storage medium.
Background
The three-dimensional display technology is one of the important discoveries in the development of the future display technology, and the three-dimensional display technology generates more real visual perception by acquiring depth information which is not possessed by the two-dimensional display technology through observation. However, when the three-dimensional display mode is switched to the two-dimensional image mode, the two-dimensional image is not in the visible range of the viewpoint, and cannot be displayed on the screen or cannot be quickly overlaid on the screen.
Disclosure of Invention
The invention provides a method and a system for adapting a two-dimensional image to a screen, computer equipment and a storage medium, which can realize that the two-dimensional image quickly spreads the screen in a three-dimensional scene.
In one aspect, the present invention provides a method for adapting a two-dimensional image to a screen, where the method is applied to a three-dimensional scene, and includes:
determining a view cone visual field range of the camera according to a set position of the camera and a view field angle of the camera, wherein the set position of the camera is a position relative to a screen, and the view cone visual field range is a quadrangular frustum and comprises a near plane and a far plane;
acquiring the size of a two-dimensional image;
determining the target position according to the size of the far plane and the size of the two-dimensional image;
moving the two-dimensional image to the target location to flood the screen with the two-dimensional image.
The visual range of the camera is determined according to the set camera pair position and the view field angle of the camera, and then the target position is determined according to the size of the far plane and the size of the two-dimensional image, so that the two-dimensional image can be filled with the screen after the two-dimensional image is moved to the target position, the process is simple, the calculated amount is small, and the two-dimensional image can be quickly adapted to the three-dimensional scene.
Further, the determining the view range of the view cone of the camera according to the set position of the camera and the view angle thereof comprises: and determining the size of the far plane according to the set view field angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera.
The size of the far plane is determined according to the set view field angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera, the process is simple, the calculated amount is small, and therefore the speed of the two-dimensional image adapting to the three-dimensional scene is improved.
Further, the set view angle of the camera comprises a vertical view angle; the determining the size of the far plane according to the set view field angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera specifically comprises:
and calculating the width and the length of the far plane according to the set vertical visual angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera according to the following formulas:
Hfar＝2*tan(fov/2)*farDist；
Wfar＝Hfar*ratio；
where Hfar denotes the length of the far plane, Wfar denotes the width of the far plane, fov denotes the vertical viewing angle of the camera, fardest denotes the distance from the far plane to the camera, and ratio denotes the ratio of the distance from the near plane to the camera to the distance from the far plane to the camera.
The size of the far plane is determined according to the set view field angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera, the process is simple, the calculated amount is small, and therefore the speed of the two-dimensional image adapting to the three-dimensional scene is improved.
Further, the determining the view field range of the view cone of the camera according to the set position of the camera and the view field angle thereof further comprises: and establishing a camera coordinate system (Xc, Yc, Zc) by taking the set position of the video camera as an origin, wherein the distance from the near plane to the video camera is the distance from the point of intersection of the Zc axis and the near plane to the origin, and the distance from the far plane to the video camera is the distance from the point of intersection of the Zc axis and the far plane to the origin.
Further, the determining the target position according to the size of the far plane and the size of the two-dimensional image specifically includes:
calculating the target position according to the size of the far plane and the size of the two-dimensional image according to the following formula:
let max＝Math.max(a1,a2,…,an)；
let w2＝Math.pow(max,2)；
let h2＝Math.pow(Hfar/2.0,2)；
let distance＝Math.sqrt(w2-h2)；
Let zDistance＝Math.ceil(distance)；
let max represents the maximum value of each side length of the two-dimensional image, Math.max represents the maximum value of the calculation parameter, and a1,a2,…,anThe length of each side of the two-dimensional image is represented, n represents the number of the two-dimensional image sides, n is an integer and is greater than 3, Let w2 represents the square value of the maximum value, Let h2 represents the square value of one half of the far plane length, distance represents the distance of the target position from the origin on the Zc axis, Math.sqrt represents the square root of the solved parameter, Let zDistance represents the value of the target position from the origin on the Zc axis after the distance from the origin is rounded, and Math.ceil represents the parameter rounding Let.
The target position is calculated according to the size of the far plane and the size of the two-dimensional image, the process is simple, the calculation amount is small, and the two-dimensional image can be quickly adapted to the three-dimensional scene.
Further, before moving the two-dimensional image to the target position, determining a coordinate point of the target position according to letdasnce;
the moving the two-dimensional image to the target position specifically includes: and moving the two-dimensional image to a coordinate point of the target position.
In another aspect, there is provided a two-dimensional image-adapted screen system, which is applied to a three-dimensional scene, the system including:
a field of view determination module: the device comprises a camera, a screen, a view frustum and a control module, wherein the view frustum view range of the camera is determined according to a set position of the camera and a view field angle thereof, the set position of the camera is a position relative to the screen, and the view frustum view range is a quadrangular frustum and comprises a near plane and a far plane;
the target position determining module is used for determining a target position according to the size of the far plane and the size of the two-dimensional image;
the acquisition module is used for acquiring the size of the two-dimensional image;
and the position moving module is used for moving the two-dimensional image to the target position so as to fill the screen with the two-dimensional image.
The visual range of the camera is determined according to the set camera pair position and the view field angle of the camera, and then the target position is determined according to the size of the far plane and the size of the two-dimensional image, so that the two-dimensional image can be filled with the screen after the two-dimensional image is moved to the target position, the process is simple, the calculated amount is small, and the two-dimensional image can be quickly adapted to the three-dimensional scene.
In one aspect, a computer storage medium is provided, which includes a memory and a processor, the memory stores a computer program, and the processor implements the method for adapting a two-dimensional image to a screen as described above when executing the computer program.
In one aspect, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, implements the method of two-dimensional image adaptation screen as described above.
Compared with the prior art, the invention has the beneficial effects that: according to the method, the visual range of the camera is determined according to the set camera pair position and the view field angle of the camera, and then the target position is determined according to the size of the far plane and the size of the two-dimensional image, so that the two-dimensional image can be filled in the screen after the two-dimensional image is moved to the target position, the process is simple, the calculated amount is small, and the two-dimensional image can be quickly adapted to the three-dimensional scene.
Drawings
Fig. 1 is a schematic flow chart of a method for adapting a two-dimensional image to a screen according to the present invention.
Fig. 2 is a schematic diagram of a market-wide configuration of the camera of the present invention.
Detailed Description
The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
As shown in fig. 1, a schematic flow chart of a method for adapting a two-dimensional image to a screen in this embodiment is shown, and a scheme adopted in this embodiment is a method for adapting a two-dimensional image to a screen, where the method is applied to a three-dimensional scene, and includes:
s1, determining a view cone visual field range of a camera according to a set position of the camera and a view field angle of the camera, wherein the set position of the camera is a position relative to a screen, and the view cone visual field range is a quadrangular frustum pyramid and comprises a near plane and a far plane;
specifically, the set position of the camera is a position relative to the screen, the position of the camera can be specified by a user, and the camera displays objects in the visual field range of the camera on the screen; the field of view angles include, but are not limited to, 0 °, 30 °, 45 °, and 60 °; the visual cone visual field range refers to a visual cone range of a camera in a three-dimensional scene, and is a quadrangular frustum formed by six surfaces, namely an upper plane, a lower plane, a left plane, a right plane, a near plane and a far plane, objects in the visual cone visual field range are visible, namely the objects in the visual cone visual field range can be displayed on a screen, and the objects outside the visual cone visual field range are invisible, namely the objects outside the visual cone visual field range can not be displayed on the screen; because the internal parameters of the camera are fixed, once the position and the view field angle of the camera are set, the size of the view cone and the view field range of the view cone can be determined according to the set position and the view field angle of the camera.
S2, acquiring the size of the two-dimensional image;
specifically, when the three-dimensional display is switched to the two-dimensional image mode, the two-dimensional image needs to be projected into a screen for display to form a two-dimensional scene; the two-dimensional image includes, but is not limited to, a triangle, a square, a rectangle, and a circle, and the size of the two-dimensional image is a side length or a diameter of the two-dimensional image.
S3, determining a target position according to the size of the far plane and the size of the two-dimensional image;
and S4, moving the two-dimensional image to the target position so that the two-dimensional image fills the screen.
The method comprises the steps of determining the visual field range of a camera according to a set camera pair position and a set visual field angle, then determining a target position according to the size of a far plane and the size of a two-dimensional image, and calculating to obtain the target position according to the maximum value of each side length of the two-dimensional image, so that the two-dimensional image is just full of the section of a visual cone when the two-dimensional image is moved to the target position, and the two-dimensional image can be full of a screen after the two-dimensional image is moved to the target position.
In this embodiment, the determining the view range of the view cone of the camera according to the set position of the camera and the view angle thereof in step S1 specifically includes: and determining the size of the far plane according to the set view field angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera.
Specifically, as shown in FIG. 2, the field of view angles include, but are not limited to, 0 °, 30 °, 45 °, and 60 °; the method comprises the steps of taking an optical axis of a camera as an origin, generating a ray according to a set view field angle of the camera, wherein the distance from an intersection point of the ray when the ray penetrates through a near plane to the camera is the distance from the near plane to the camera, the distance from the intersection point of the ray when the ray penetrates through the near plane to the camera is the distance from the near plane to the camera and is marked as near Dist, the distance from the intersection point of the ray when the ray penetrates through a far plane to the camera is the distance from the far plane to the camera and is marked as far Dist, and the ray is perpendicular to the near plane and the far plane respectively.
The size of the far plane is determined according to the set view field angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera, the process is simple, the calculated amount is small, and therefore the speed of the two-dimensional image adapting to the three-dimensional scene is improved.
In this embodiment, the set viewing angle of the camera includes a vertical viewing angle; the determining the size of the far plane according to the set view field angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera specifically comprises:
and calculating the width and the length of the far plane according to the set vertical visual angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera according to the following formulas:
Hfar＝2*tan(fov/2)*farDist；
Wfar＝Hfar*ratio；
where Hfar denotes the length of the far plane, Wfar denotes the width of the far plane, fov denotes the vertical viewing angle of the camera, fardest denotes the distance from the far plane to the camera, and ratio denotes the ratio of the distance from the near plane to the camera to the distance from the far plane to the camera.
Specifically, the field angle of the camera includes a horizontal angle and a vertical angle.
In this embodiment, the determining the view range of the camera according to the set position of the camera and the view angle thereof further includes: s11, establishing a camera coordinate system (Xc, Yc, Zc) by taking the set position of the camera as an origin, wherein the distance from the near plane to the camera is the distance from the point where the Zc axis intersects with the near plane to the origin, and the distance from the far plane to the camera is the distance from the point where the Zc axis intersects with the far plane to the origin.
Specifically, a camera coordinate system (Xc, Yc, Zc) is established with the set position of the camera as an origin (0,0,0) and the optical axis of the camera as a Zc axis, wherein the Xc axis and the Yc axis are parallel to the near plane and the far plane.
In this embodiment, the determining the target position according to the size of the far plane and the size of the two-dimensional image specifically includes:
calculating the target position according to the size of the far plane and the size of the two-dimensional image according to the following formula:
let max＝Math.max(a1,a2,…,an)；
let w2＝Math.pow(max,2)；
let h2＝Math.pow(Hfar/2.0,2)；
let distance＝Math.sqrt(w2-h2)；
Let zDistance＝Math.ceil(distance)；
let max represents the maximum value of each side length of the two-dimensional image, Math.max represents the maximum value of the calculation parameter, and a1,a2,…,anThe length of each side of the two-dimensional image is represented, n represents the number of the two-dimensional image sides, n is an integer and is greater than 3, Let w2 represents the square value of the maximum value, Let h2 represents the square value of one half of the far plane length, distance represents the distance of the target position from the origin on the Zc axis, Math.sqrt represents the square root of the solved parameter, Let zDistance represents the value of the target position from the origin on the Zc axis after the distance from the origin is rounded, and Math.ceil represents the parameter rounding Let.
In this embodiment, before moving the two-dimensional image to the target location, determining a coordinate point of the target location according to the let distance;
the moving the two-dimensional image to the target position specifically includes: and moving the two-dimensional image to a coordinate point of the target position.
Specifically, the geometric center of the two-dimensional image is moved to a coordinate point of the target position.
Example 2
The embodiment provides a system for adapting a two-dimensional image to a screen, which is applied to a three-dimensional scene, and comprises:
a field of view determination module: the device comprises a camera, a screen, a view frustum and a control module, wherein the view frustum view range of the camera is determined according to a set position of the camera and a view field angle thereof, the set position of the camera is a position relative to the screen, and the view frustum view range is a quadrangular frustum and comprises a near plane and a far plane;
the target position determining module is used for determining a target position according to the size of the far plane and the size of the two-dimensional image;
the acquisition module is used for acquiring the size of the two-dimensional image;
and the position moving module is used for moving the two-dimensional image to the target position so as to fill the screen with the two-dimensional image.
Specifically, the system further comprises a far plane determining module, which is used for determining the size of the far plane according to the set view field angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera; the set view angle of the camera comprises a vertical view angle; the determining of the size of the far plane by the far plane determining module according to the set view field angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera specifically includes: and calculating the width and the length of the far plane according to the set vertical visual angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera according to the following formulas:
Hfar＝2*tan(fov/2)*farDist；
Wfar＝Hfar*ratio；
where Hfar denotes the length of the far plane, Wfar denotes the width of the far plane, fov denotes the vertical viewing angle of the camera, fardest denotes the distance from the far plane to the camera, and ratio denotes the ratio of the distance from the near plane to the camera to the distance from the far plane to the camera.
Specifically, the system further includes a coordinate system establishing module configured to establish a camera coordinate system (Xc, Yc, Zc) with the set position of the camera as an origin, where a distance from the near plane to the camera is a distance from a point where the Zc axis intersects with the near plane to the origin, and a distance from the far plane to the camera is a distance from a point where the Zc axis intersects with the far plane to the origin.
Specifically, the determining, by the target position determining module, the target position according to the size of the far plane and the size of the two-dimensional image specifically includes: calculating the target position according to the size of the far plane and the size of the two-dimensional image according to the following formula:
let max＝Math.max(a1,a2,…,an)；
let w2＝Math.pow(max,2)；
let h2＝Math.pow(Hfar/2.0,2)；
let distance＝Math.sqrt(w2-h2)；
Let zDistance＝Math.ceil(distance)；
let max represents the maximum value of each side length of the two-dimensional image, and Math.max represents the maximum value of the obtained parameterLarge value of a1,a2,…,anThe length of each side of the two-dimensional image is represented, n represents the number of the two-dimensional image sides, n is an integer and is greater than 3, Let w2 represents the square value of the maximum value, Let h2 represents the square value of one half of the far plane length, distance represents the distance of the target position from the origin on the Zc axis, Math.sqrt represents the square root of the solved parameter, Let zDistance represents the value of the target position from the origin on the Zc axis after the distance from the origin is rounded, and Math.ceil represents the parameter rounding Let.
Specifically, the target position determining module is further configured to determine a coordinate point of the target position according to the let distance; the position moving module moves the two-dimensional image to a coordinate point of the target position; the position moving module moves a geometric center of the two-dimensional image to a coordinate point of the target position.
The visual range of the camera is determined according to the set camera pair position and the view field angle of the camera, and then the target position is determined according to the size of the far plane and the size of the two-dimensional image, so that the two-dimensional image can be filled with the screen after the two-dimensional image is moved to the target position, the process is simple, the calculated amount is small, and the two-dimensional image can be quickly adapted to the three-dimensional scene.
In one embodiment, a computer storage medium is provided, comprising a memory storing a computer program and a processor implementing the method for two-dimensional image adaptation to a screen as described above when the processor executes the computer program.
In another embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the method of two-dimensional image adaptation to a screen as described above.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.
Claims (9)
1. A method for adapting a two-dimensional image to a screen, the method being applied to a three-dimensional scene, the method comprising:
determining a view cone visual field range of the camera according to a set position of the camera and a view field angle of the camera, wherein the set position of the camera is a position relative to a screen, and the view cone visual field range is a quadrangular frustum and comprises a near plane and a far plane;
acquiring the size of a two-dimensional image;
determining the target position according to the size of the far plane and the size of the two-dimensional image;
moving the two-dimensional image to the target location to flood the screen with the two-dimensional image.
2. The method for adapting a screen according to a two-dimensional image of claim 1, wherein the determining the view field of the camera according to the set position of the camera and the view field angle thereof comprises: and determining the size of the far plane according to the set view field angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera.
3. The method of claim 2, wherein the set angle of the camera's field of view comprises a vertical viewing angle; the determining the size of the far plane according to the set view field angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera specifically comprises:
and calculating the width and the length of the far plane according to the set vertical visual angle of the camera, the distance from the near plane to the camera and the distance from the far plane to the camera according to the following formulas:
Hfar＝2*tan(fov/2)*farDist；
Wfar＝Hfar*ratio；
where Hfar denotes the length of the far plane, Wfar denotes the width of the far plane, fov denotes the vertical viewing angle of the camera, fardest denotes the distance from the far plane to the camera, and ratio denotes the ratio of the distance from the near plane to the camera to the distance from the far plane to the camera.
4. A method for adapting a screen according to any of claims 2-3, wherein said determining the view cone field of view of said camera according to the set position of said camera and its angle of view further comprises: and establishing a camera coordinate system (Xc, Yc, Zc) by taking the set position of the video camera as an origin, wherein the distance from the near plane to the video camera is the distance from the point of intersection of the Zc axis and the near plane to the origin, and the distance from the far plane to the video camera is the distance from the point of intersection of the Zc axis and the far plane to the origin.
5. The method for adapting a two-dimensional image to a screen according to claim 4, wherein the determining the target position according to the size of the far plane and the size of the two-dimensional image specifically comprises:
calculating the target position according to the size of the far plane and the size of the two-dimensional image according to the following formula:
let max＝Math.max(a1,a2,…,an)；
let w2＝Math.pow(max,2)；
let h2＝Math.pow(Hfar/2.0,2)；
let distance＝Math.sqrt(w2-h2)；
Let zDistance＝Math.ceil(distance)；
let max represents the maximum value of each side length of the two-dimensional image, Math.max represents the maximum value of the calculation parameter, and a1,a2,…,anThe length of each side of the two-dimensional image is represented, n represents the number of the two-dimensional image sides, n is an integer and is greater than 3, Let w2 represents the square value of the maximum value, Let h2 represents the square value of one half of the far plane length, distance represents the distance of the target position from the origin on the Zc axis, Math.sqrt represents the square root of the solved parameter, Let zDistance represents the value of the target position from the origin on the Zc axis after the distance from the origin is rounded, and Math.ceil represents the parameter rounding Let.
6. The method of claim 5, wherein moving the two-dimensional image to the target location further comprises determining a coordinate point of the target location from a let distance;
the moving the two-dimensional image to the target position specifically includes: and moving the two-dimensional image to a coordinate point of the target position.
7. A two-dimensional image-adapted screen system for application to a three-dimensional scene, the system comprising:
a field of view determination module: the device comprises a camera, a screen, a view frustum and a control module, wherein the view frustum view range of the camera is determined according to a set position of the camera and a view field angle thereof, the set position of the camera is a position relative to the screen, and the view frustum view range is a quadrangular frustum and comprises a near plane and a far plane;
the acquisition module is used for acquiring the size of the two-dimensional image;
the target position determining module is used for determining a target position according to the size of the far plane and the size of the two-dimensional image;
and the position moving module is used for moving the two-dimensional image to the target position so as to fill the screen with the two-dimensional image.
8. A computer storage medium comprising a memory and a processor, the memory storing a computer program, wherein the processor when executing the computer program implements the method for adapting a two-dimensional image to a screen of any one of claims 1 to 6.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method of adapting a two-dimensional image to a screen according to any one of claims 1 to 6.
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