CN113093501A - Holographic projector, projection control method and device - Google Patents
Holographic projector, projection control method and device Download PDFInfo
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- CN113093501A CN113093501A CN202110251480.9A CN202110251480A CN113093501A CN 113093501 A CN113093501 A CN 113093501A CN 202110251480 A CN202110251480 A CN 202110251480A CN 113093501 A CN113093501 A CN 113093501A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000000877 morphologic effect Effects 0.000 claims abstract description 43
- 238000005516 engineering process Methods 0.000 description 14
- 239000013589 supplement Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2202—Reconstruction geometries or arrangements
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Abstract
The invention discloses a holographic projector, a projection control method and a device, wherein the holographic projector comprises: the hologram projector includes: the device comprises a base, a plurality of projectors and a holographic image screen; the bottom of base is equipped with flexible subassembly, flexible subassembly respectively with a plurality of projector connects, every the projector is equipped with tortuous projection screen, the holographic image screen surrounds a plurality of projector sets up the top surface of base. The projector can form the morphological structure of an object to be projected by moving the projector, and then the projector projects light to the holographic image screen to display the image on the holographic image screen.
Description
Technical Field
The invention relates to the technical field of projection, in particular to a holographic projector, a projection control method and a projection control device.
Background
A holographic projection technique (front-projected holographic display), also called holographic projection, holographic 3D, is a photographic technique that records all the information (amplitude, phase) in the reflected (or transmitted) light wave of a subject, while the light reflected or transmitted by the subject can be completely reconstructed by a recording film as if the subject were there, while viewing the photograph from different orientations and angles, the different angles of the subject being photographed can be seen.
There are three commonly used holographic projection technologies, namely a 360-degree holographic display screen technology, an air projection technology and a laser beam projection technology. The 360-degree holographic display screen technology projects an image on a mirror, and then the mirror rotates at a high speed, so that a 3D stereoscopic image is generated; the air projection technology is to project an image on water vapor by using the water vapor, and a three-dimensional image is formed due to unbalanced vibration among molecules; the laser beam projection technique is to project a 3D image in air by using a mixture of nitrogen and oxygen dispersed in air, which turns into a hot, pasty substance.
However, the conventional hologram technology has the following problems: when the 360-degree holographic display screen technology is adopted to control the high-speed rotation process of the mirror, the condition of light source dissipation is easy to occur, and the displayed image is incomplete; the water vapor adopting the air projection technology is difficult to control, so that the displayed image is easy to deform; the mixture of the laser beam projection technology is difficult to manufacture, the shape of the mixture is easy to deform, the projection time is shortened, and the projection quality is influenced.
Disclosure of Invention
The invention provides a holographic projector, a projection control method and a projection control device.
A first aspect of embodiments of the present invention provides a holographic projector, including: the device comprises a base, a plurality of projectors and a holographic image screen;
the bottom of the base is provided with a telescopic assembly, the telescopic assembly is respectively connected with the plurality of projectors, each projector is provided with a zigzag projection screen, and the holographic image screen surrounds the plurality of projectors and is arranged on the top surface of the base;
the telescopic assembly drives the projectors to move up and down so that the projectors can display the image to be displayed, and the projection screen irradiates the image to be displayed to the holographic image screen.
In a possible implementation manner of the first aspect, the projector is a sphere structure, the projection screen is a curved screen, the curved screen surrounds the side of the projector, the curved screen is provided with a plurality of projection lenses, and the to-be-displayed image is irradiated to the holographic image screen through the plurality of projection lenses.
In a possible implementation manner of the first aspect, a projection plane is arranged at the top of the projector, the projection plane is composed of a plurality of projection columns, the projection columns are square columns, a curved screen is arranged on the side of each projection column, and the curved screen surrounds the projection columns.
In one possible implementation manner of the first aspect, the holographic projector further includes: a light compensating screen;
the light compensating screen is arranged at the top of the base, and the light compensating screen is arranged around the projector by taking the projector as the center.
In a possible implementation manner of the first aspect, the holographic image screen includes a plurality of image screens, and the plurality of image screens are connected end to end with the projector as a circle center and surround the projector.
In a possible implementation manner of the first aspect, the image screen uses the top surface of the base as a plane, inclines to the perpendicular of the base, and forms an included angle θ with the top surface of the base, and an angle range of the included angle θ is 30-60 degrees.
In a possible implementation manner of the first aspect, the telescopic assembly includes a telescopic motor and a telescopic column, the telescopic motor is connected to the telescopic column, the telescopic motor is disposed at the bottom of the base, and the telescopic column is connected to the projector.
A second aspect of embodiments of the present invention provides a projection control method, which is applied to the holographic projector described above, the method including:
acquiring a projection image input by a user, and acquiring a morphological structure of the projection image;
controlling the projector to move to a corresponding target position according to the morphological structure, so that the projector forms a display structure corresponding to the morphological structure at the target position;
and controlling the projection screen to project light to the holographic image screen so that the holographic image screen displays the projected image according to the display structure.
In a possible implementation manner of the second aspect, the acquiring a morphological structure of the projection image includes:
scanning the projection image to obtain a plane image, and intercepting a projection area corresponding to a projection object from the plane image;
extracting a plurality of node coordinates from the projection area;
and connecting the node coordinates with the morphological structure of the projection image.
A third aspect of embodiments of the present invention provides a projection control apparatus, which is applied to the hologram projector described above, the apparatus including:
the acquisition module is used for acquiring a projection image input by a user and acquiring a morphological structure of the projection image;
the display module is used for controlling the projector to move to a corresponding target position according to the morphological structure, so that the projector can form a display structure corresponding to the morphological structure at the target position;
and the projection module is used for controlling the projection screen to project light to the holographic image screen so that the holographic image screen displays the projected image according to the display structure.
Compared with the prior art, the holographic projector, the projection control method and the projection control device provided by the embodiment of the invention have the beneficial effects that: the projector can form the morphological structure of an object to be projected by moving the projector, and then the projector projects light to the holographic image screen to display the image on the holographic image screen.
Drawings
Fig. 1 is a schematic structural diagram of a holographic projector according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a projector according to an embodiment of the invention;
fig. 3 is a flowchart illustrating a projection control method according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a projection control apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The current commonly used holographic imaging technology has the following problems: when the 360-degree holographic display screen technology is adopted to control the high-speed rotation process of the mirror, the condition of light source dissipation is easy to occur, and the displayed image is incomplete; the water vapor adopting the air projection technology is difficult to control, so that the displayed image is easy to deform; the mixture of the laser beam projection technology is difficult to manufacture, the shape of the mixture is easy to deform, the projection time is shortened, and the projection quality is influenced.
In order to solve the above problem, a holographic projector provided by the embodiments of the present application will be described and explained in detail by the following specific embodiments.
Referring to fig. 1-2, a schematic structural diagram of a holographic projector according to an embodiment of the present invention and a schematic structural diagram of a projector according to an embodiment of the present invention are respectively shown, and in this embodiment, the holographic projector may include: the device comprises a base 1, a plurality of projectors 2 and a holographic image screen 3;
the bottom of the base 1 is provided with a telescopic component 11, the telescopic component 11 is respectively connected with the plurality of projectors 2, each projector 2 is provided with a zigzag projection screen 21, and the holographic image screen 3 surrounds the plurality of projectors 2 and is arranged on the top surface of the base 1;
the telescopic assembly 11 drives the projectors 2 to move up and down, so that the projectors 2 have structures of images to be displayed, and the images to be displayed are irradiated to the holographic image screen 3 by the projection screen 21.
In actual operation, the telescopic assemblies 11 can respectively drive the plurality of projectors 2 to move up and down, so that one side of the projector 2 can form a morphological structure of an object to be projected. For example, a horse needs to be projected, the projectors 2 can be driven to move respectively, so that the shape of one side of the projectors 2 is the same as the shape and structure of the horse to form the shape and structure of the horse, then the projection screen 21 on the projector 2 is controlled to project light to the holographic image screen 3, and finally the holographic image screen 3 displays the projected light to form a holographic image. Because the projector 2 can form the shape structure of the object to be projected, and the projector 2 can project light, the holographic image is changed according to the movement of the projector 2, the condition that the displayed image is incomplete due to the loss of the light source is avoided, the movement of the projector 2 is easy to control, the projection operation can be continuously carried out, the projected image is difficult to deform, the projection time can be prolonged, and the projection quality is improved.
In this embodiment, because the shape that the object that needs the projection corresponds is different, in order to improve the flexibility that shows the form, projector 2 is the spheroid structure, it is the curved surface screen to throw screen 21, just the curved surface screen surrounds the side of projector 2, the curved surface screen is equipped with a plurality of projection lens to will wait to show the image through a plurality of projection lens shine to holographic image screen 3.
In particular, the number of projectors 2 may be adjusted according to actual needs.
In order to facilitate the user to control the movement of the projector 2, when the holographic projector is applied, the holographic projector may be connected to a computer terminal, and the user may control the activation of the telescopic assembly 11 through the computer terminal, so as to control the movement of the projector 2 through the telescopic assembly 11.
In practical operation, since the projected object includes a square structure, in order to further improve the flexibility of display and increase the type of the form of projection, in this embodiment, the top of the projector 2 is provided with a projection plane 22, the projection plane 22 is composed of a plurality of projection columns 23, the projection columns 23 are square cylinders, and the sides of the projection columns 23 may also be provided with curved screens, and the curved screens surround the projection columns 23.
Specifically, each projection column 23 may also be connected to the telescopic assembly 11, and the telescopic assembly 11 may also control each projection column 23 to move up and down, respectively.
When projection is needed, the telescopic assembly 11 can drive different projection columns 23 and different projectors 2 to move up and down, so that different projection columns 23 and different projectors 2 move up and down, and a plurality of projectors are used
In order to avoid the situation that the light loss causes image blurring, the holographic projector further includes: a light compensating screen 12;
When the projector 2 projects light to the holographic image screen 3 to form a projection image, the light supplement lamp on the light supplement screen 12 can be started, so that the light supplement lamp can irradiate the holographic image screen 3 to supplement light for the projection image on the holographic image screen 3.
In actual operation, the user can watch the projection image from different directions, and in order to meet the watching requirements of different angles, the holographic image screen 3 comprises a plurality of image screens, and the plurality of image screens are connected end to end by taking the projector 2 as the circle center and surround the projector 2.
Referring to fig. 1-2, in an alternative embodiment, 4 image screens may be provided, and the 4 image screens may be respectively provided in four directions of the projector 2, so that a user can view a projected image in four different directions.
In order to increase the display effect, the image screen with the top surface of base 1 is the plane, to the perpendicular direction slope of base 1, and with the top surface of base 1 forms contained angle theta, the angular scope of contained angle theta is 30-60 degrees.
Because the image screen is arranged obliquely, the projected image can be more stereoscopic, unlike a plane image.
In order to improve the flexibility of the movement of the projector 2, in this embodiment, the telescopic assembly 11 includes a telescopic motor 13 and a telescopic column 14, the telescopic motor 13 is connected to the telescopic column 14, the telescopic motor 13 is disposed at the bottom of the base 1, and the telescopic column 14 is connected to the projector 2.
Specifically, a plurality of telescopic motors 13 and a plurality of telescopic columns 14 may be provided, and each telescopic motor 13 is connected to one telescopic column 14, and the up-and-down movement of the projector 2 is controlled by the telescopic column 14.
In addition, one telescopic column 14 can be connected with one projection column 23, and the telescopic column 14 drives the projection column 23 to move up and down, so that different morphological structures are formed.
In this embodiment, an embodiment of the present invention provides a holographic projector, which has the following beneficial effects: the projector can form the morphological structure of an object to be projected by moving the projector, and then the projector projects light to the holographic image screen to display the image on the holographic image screen.
Referring to fig. 3, a flowchart of a projection control method according to an embodiment of the present invention is shown. The invention also provides a projection control method. The method is applied to the holographic projector as described in the above embodiments.
By way of example, the method may include:
and S11, acquiring the projected image input by the user and acquiring the morphological structure of the projected image.
In practice, a user may send a projected image, which may be a variety of different objects, such as a car, a human image, an animal, etc., to the holographic projector through the user terminal.
The holographic projector can identify the morphological structure of an object to be displayed from the projected image, and then control the projector to form a corresponding shape according to the identified morphological structure.
In order to improve the recognition efficiency and the recognition accuracy, the step S11 may include the following sub-steps:
and a substep S111 of scanning the projection image to obtain a plane image and intercepting a projection area corresponding to the projection object from the plane image.
Specifically, the projection image of the projection object may be scanned to obtain a corresponding planar image, and then the projection area of the projection object is extracted from the planar image, where the projection area is an area occupied by the projection object in the planar image.
Substep S112, extracting several node coordinates from the projection area.
The node coordinates are coordinates of the projection area in the plane image. In particular implementations, the node coordinates may include vertex coordinates and middle coordinates of vertex coordinates adjacent to the left of the midpoint. Specifically, a plurality of vertex coordinates may be extracted from the projection area, and then it is determined whether a coordinate distance between adjacent vertex coordinates is greater than a preset distance; and if the coordinate distance between the adjacent vertex coordinates is larger than the preset distance, acquiring a plurality of midpoint coordinates in the connecting line of the adjacent vertex coordinates according to the preset distance.
And a substep S113 of connecting the plurality of node coordinates to the morphological structure of the projected image.
And then connecting the coordinates of the plurality of nodes end to form a morphological structure of the projection image on a certain side surface.
And S12, controlling the projector to move to a corresponding target position according to the morphological structure, so that the projector forms a display structure corresponding to the morphological structure at the target position.
In this embodiment, after the morphological structure of the projection object is determined, the telescopic motor may be controlled to start according to the morphological structure, and the telescopic motor may control the projectors to move up and down, so as to move each projector to a corresponding coordinate point in the morphological structure.
For example, the projection object is a pyramid, the projection image formed on a certain plane by the pyramid has 5 node coordinates, the form structure may include 5 node coordinates, and the telescopic motor may be controlled to drive the 5 projectors to move to the 5 node coordinates, respectively, so that the projectors may form the form structure of the pyramid.
And S13, controlling the projection screen to project light to the holographic image screen so that the holographic image screen displays the projected image according to the display structure.
The display structure is a structure with a surface similar to the morphological structure formed by the projector according to the morphological structure. After the projector moves to form the display structure, the projection image can be transmitted to the projection screen on the projector, so that the projection screen can project the projection image to the holographic image screen, and the holographic image screen can display the projection image.
In one embodiment, the holographic image screen is provided with a plurality of image screens, and the projector may display a projection object on one side, and the shape structure presented on other sides or other angles may be different from that of the projection object, so that the image screens at different angles can display the same projection image, wherein, as an example, step S13 may include the following sub-steps:
and the substep S131, determining a first image screen projected by the projector, and acquiring a first projection image displayed by the first image screen.
The first image screen is the image screen towards which the projector displays the morphological structure. The first projection image is an image displayed by the first image screen.
Specifically, when the projector is controlled to form the morphological structure of the projection object, the angle of the display can be selected, and the angle of the display can be adjusted according to the actual needs of the user. After the angle of the display is determined, the projector can be controlled to move towards the angle of the display, so that a corresponding morphological structure is formed.
In determining the angle of the display, the video screen towards which the morphological structure is oriented may be determined.
And a substep S132 of controlling the supplementary lighting to supplement lighting to a plurality of image screens according to the first projection image, so that the plurality of image screens form and display the first projection image.
The plurality of image screens are a plurality of image screens which are not the first image screen in the plurality of image screens.
Because the images presented by the non-first image screen are possibly different, the light supplementing projection can be carried out through the light supplementing screen, so that the non-first image screen can form the first projection image which is the same as the first image screen, and a user can view the images from different angles.
In this embodiment, an embodiment of the present invention provides a projection control method, which has the following beneficial effects: the invention can control the projector to form a corresponding morphological structure according to the projection image input by the user, and control the projector to project the corresponding projection image to the holographic projection screen, and the projector can ensure that the morphological structure is not easy to deform, thereby prolonging the projection time and improving the projection stability and the projection quality.
An embodiment of the present invention further provides a projection control apparatus, and referring to fig. 4, a schematic structural diagram of the projection control apparatus according to an embodiment of the present invention is shown.
Wherein, as an example, the apparatus may be applied to the hologram projector described in the above embodiment, and the projection control apparatus may include:
an obtaining module 401, configured to obtain a projection image input by a user, and obtain a morphological structure of the projection image;
a display module 402, configured to control the projector to move to a corresponding target position according to the morphological structure, so that the projector forms a display structure corresponding to the morphological structure at the target position;
and a projection module 403, configured to control the projection screen to project light onto the holographic image screen, so that the holographic image screen displays the projected image according to the display structure.
Further, the obtaining module is further configured to:
scanning the projection image to obtain a plane image, and intercepting a projection area corresponding to a projection object from the plane image;
extracting a plurality of node coordinates from the projection area;
and connecting the node coordinates with the morphological structure of the projection image.
Further, the projection module is further configured to:
determining a first image screen projected by the projector, and acquiring a first projection image displayed by the first image screen.
And controlling the supplementary lighting to carry out supplementary lighting on a plurality of image screens according to the first projection image so that the plurality of image screens form and display the first projection image.
Further, an embodiment of the present application further provides an electronic device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the projection control method as described in the above embodiments when executing the program.
Further, an embodiment of the present application also provides a computer-readable storage medium, where computer-executable instructions are stored, and the computer-executable instructions are configured to enable a computer to execute the projection control method according to the above embodiment.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A holographic projector, characterized in that the holographic projector comprises: the device comprises a base, a plurality of projectors and a holographic image screen;
the bottom of the base is provided with a telescopic assembly, the telescopic assembly is respectively connected with the plurality of projectors, each projector is provided with a zigzag projection screen, and the holographic image screen surrounds the plurality of projectors and is arranged on the top surface of the base;
the telescopic assembly drives the projectors to move up and down so that the projectors can display the image to be displayed, and the projection screen irradiates the image to be displayed to the holographic image screen.
2. The holographic projector as claimed in claim 1, wherein the projector is a sphere structure, the projection screen is a curved screen surrounding the side of the projector, the curved screen is provided with a plurality of projection lenses, and the holographic screen is illuminated with the image to be displayed through the plurality of projection lenses.
3. The holographic projector of claim 2, wherein the projector has a projection plane on the top, the projection plane is composed of a plurality of projection columns, the projection columns are square columns, and the projection columns have curved screens on the sides, and the curved screens surround the projection columns.
4. The holographic projector of claim 1, further comprising: a light compensating screen;
the light compensating screen is arranged at the top of the base, and the light compensating screen is arranged around the projector by taking the projector as the center.
5. The holographic projector of claim 1, wherein the holographic image screen comprises a plurality of image screens that are connected end-to-end around the projector and surround the projector.
6. The holographic projector of claim 5, wherein the image screen is tilted toward a perpendicular of the base with the top surface of the base as a plane, and forms an included angle θ with the top surface of the base, and the included angle θ is in a range of 30-60 degrees.
7. The holographic projector of claim 1, wherein the telescopic assembly comprises a telescopic motor and a telescopic column, the telescopic motor is connected with the telescopic column, the telescopic motor is arranged at the bottom of the base, and the telescopic column is connected with the projector.
8. A projection control method applied to the hologram projector according to any one of claims 1 to 7, the method comprising:
acquiring a projection image input by a user, and acquiring a morphological structure of the projection image;
controlling the projector to move to a corresponding target position according to the morphological structure, so that the projector forms a display structure corresponding to the morphological structure at the target position;
and controlling the projection screen to project light to the holographic image screen so that the holographic image screen displays the projected image according to the display structure.
9. The projection control method according to claim 8, wherein the acquiring a morphological structure of the projected image comprises:
scanning the projection image to obtain a plane image, and intercepting a projection area corresponding to a projection object from the plane image;
extracting a plurality of node coordinates from the projection area;
and connecting the node coordinates with the morphological structure of the projection image.
10. A projection control apparatus applied to the hologram projector according to any one of claims 1 to 7, the apparatus comprising:
the acquisition module is used for acquiring a projection image input by a user and acquiring a morphological structure of the projection image;
the display module is used for controlling the projector to move to a corresponding target position according to the morphological structure so that the projector forms a display structure corresponding to the morphological structure at the target position;
and the projection module is used for controlling the projection screen to project light to the holographic image screen so that the holographic image screen displays the projected image according to the display structure.
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| CN202110251480.9A CN113093501A (en) | 2021-03-08 | 2021-03-08 | Holographic projector, projection control method and device |
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| CN202110251480.9A CN113093501A (en) | 2021-03-08 | 2021-03-08 | Holographic projector, projection control method and device |
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