CN114019752B - Holographic projection method and system - Google Patents
Holographic projection method and system Download PDFInfo
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- CN114019752B CN114019752B CN202111349819.5A CN202111349819A CN114019752B CN 114019752 B CN114019752 B CN 114019752B CN 202111349819 A CN202111349819 A CN 202111349819A CN 114019752 B CN114019752 B CN 114019752B
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000000694 effects Effects 0.000 claims abstract description 10
- 230000002708 enhancing effect Effects 0.000 claims abstract description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000004590 computer program Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B35/00—Stereoscopic photography
- G03B35/18—Stereoscopic photography by simultaneous viewing
- G03B35/20—Stereoscopic photography by simultaneous viewing using two or more projectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Holo Graphy (AREA)
Abstract
Embodiments of the present disclosure provide a holographic projection method and system, the method comprising: acquiring first projection content and second projection content, wherein the second projection content is used for enhancing the stereoscopic effect of the first projection content when projected; projecting the first projection content onto a first projection screen at a first preset angle; determining a second projection angle according to an included angle between the second projection screen and the first projection screen; and projecting the second projection content onto the second projection screen at a second projection angle, wherein holographic films are attached to the first projection screen and the second projection screen, and the first projection screen is a transparent screen. In this way, the stereoscopic effect of the projection content can be enhanced, the user requirements are met, and the user experience is improved.
Description
Technical Field
The present disclosure relates to the field of video projection, and more particularly to holographic projection methods and systems.
Background
Holographic projection is a technique that uses the principles of interference and diffraction to record and reproduce a true three-dimensional image of an object. The first step is to record the object light wave information by utilizing the interference principle, namely the shooting process: the shot object forms a diffuse object beam under laser irradiation; the other part of laser is used as reference beam to be emitted onto the holographic negative film, and is overlapped with the object beam to generate interference, so that the phase and amplitude of each point on the object light wave are converted into the intensity which is changed in space, and the whole information of the object light wave is recorded by utilizing the contrast and interval between interference fringes.
Although the holographic projection method in the prior art can generate a certain stereoscopic impression, the stereoscopic effect generated by the holographic projection in the prior art is still not obvious, the requirements of users cannot be met, and the user experience is affected.
Disclosure of Invention
In order to solve the technical problems in the prior art, embodiments of the present disclosure provide a holographic projection method and system.
In a first aspect of the present disclosure, there is provided a holographic projection method comprising:
Acquiring first projection content and second projection content, wherein the second projection content is used for enhancing the stereoscopic effect of the first projection content when projected;
projecting the first projection content onto a first projection screen at a first preset angle;
determining a second projection angle according to an included angle between the second projection screen and the first projection screen;
And projecting the second projection content onto the second projection screen at a second projection angle, wherein holographic films are attached to the first projection screen and the second projection screen, and the first projection screen is a transparent screen.
In some embodiments, the first projection content includes a planar image to be projected on the first projection screen, and the second projection content includes a depth image corresponding to the first projection content and/or a contrast image corresponding to the planar image and/or a shadow of a target in the planar image when the first projection content is viewed from a user viewing angle.
In some embodiments, further comprising synchronizing alignment of the first projected content and the second projected content based on a time axis in advance.
In some embodiments, after determining the second projection angle, the method further comprises:
and carrying out distortion correction on the second projection content according to the second projection angle.
In some embodiments, further comprising:
And receiving third projection content uploaded by the terminal equipment, projecting the third projection content into a preset area on the first projection screen, and shielding the first projection content in the preset area.
In some embodiments, the third projected content includes terminal screen content or text information input by the terminal.
In some embodiments, further comprising:
And sending a synchronization instruction to the music playing device to enable the music playing device to play the background music synchronized with the first projection content.
In a second aspect of the present disclosure, there is provided a holographic projection system comprising:
a first projection device, a second projection device, a first projection screen, a second projection screen, and a processor;
The first projection screen and the second projection screen are stuck with holographic films, and the first projection screen is a transparent screen;
the first projection device is used for projecting the first projection content onto a first projection screen at a first preset angle, the second projection device is used for projecting the second projection content onto a second projection screen at a second projection angle, and the processor is used for acquiring the first projection content and the second projection content and determining a second projection angle according to an included angle between the second projection screen and the first projection screen.
According to a third aspect of the present disclosure, an electronic device is provided. The electronic device includes: a memory and a processor, the memory having stored thereon a computer program, the processor implementing the method as described in the first aspect above when executing the program.
According to a fourth aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon a computer program which when executed by a processor implements a method as described in the first aspect above.
It should be understood that what is described in this summary is not intended to limit the critical or essential features of the embodiments of the disclosure nor to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following description.
By the holographic projection method, the stereoscopic effect of projection content can be enhanced, the user requirements are met, and the user experience is improved.
Drawings
The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. For a better understanding of the present disclosure, and without limiting the disclosure thereto, the same or similar reference numerals denote the same or similar elements, wherein:
FIG. 1 illustrates a flow chart of a holographic projection method according to an embodiment of the present disclosure;
FIG. 2 shows a schematic view of a projection process of a holographic projection system according to an embodiment of the present disclosure;
fig. 3 illustrates a block diagram of an exemplary electronic device capable of implementing embodiments of the present disclosure.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments in this disclosure without inventive faculty, are intended to be within the scope of this disclosure.
In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
According to the holographic projection method, the plane images and the corresponding depth images and/or the bright-dark contrast images and/or shadows are respectively projected onto different projection screens through different projection equipment, and the projection contents on the different projection screens are enabled to be overlapped from the perspective of a user, so that the stereoscopic impression of the projected plane images is enhanced, and the user experience is improved.
Specifically, as shown in fig. 1, a flowchart of a holographic projection method according to an embodiment of the present disclosure is shown. The holographic projection method of the present embodiment includes the following steps:
S101: and acquiring first projection content and second projection content, wherein the second projection content is used for enhancing the stereoscopic effect of the first projection content when projected.
The holographic projection method in this embodiment may be applied to a stage, a conference, or other scenes, and this embodiment is not listed one by one. When the method of the present embodiment is used for projection, first, projection contents need to be acquired, specifically, first projection contents and second projection contents need to be acquired through a processor (for example, a computer) connected to a projection device, where the first projection contents are projection contents including planar images, and when the second projection contents include depth images corresponding to the first projection contents and/or bright-dark contrast images corresponding to the planar images and/or shadows of objects in the planar images when the first projection contents are viewed from a user viewing angle. And, the second projection content is used to enhance the stereoscopic effect of the first projection content when projected.
S102: the first projection content is projected onto a first projection screen at a first preset angle.
In particular, reference may be made to fig. 2, wherein fig. 2 is a schematic illustration of a projection process of a holographic projection system according to an embodiment of the present disclosure. After the first projection content and the second projection content are acquired, the first projection content is projected onto the first projection screen 203 at a first preset angle by the first projection device 201. In this embodiment, the first preset angle may be determined according to actual needs, and in general, the first projection screen 203 is disposed vertically, and of course, in some other embodiments of the present disclosure, the first projection screen 203 may also be disposed at an angle according to actual needs. In this embodiment, the first projection screen 203 is disposed vertically as an example, and a technical solution of the present disclosure will be described.
S103: and determining a second projection angle according to the included angle between the second projection screen and the first projection screen.
In this embodiment, the first projection content and the second projection content need to be projected onto the first projection screen 203 and the second projection screen 204 that form a certain included angle, so that the corresponding content on the first projection screen 203 and the second projection screen 204 can be overlapped when viewed from the user's perspective, and thus the stereoscopic effect of the first projection content on the first projection screen 203 can be improved when viewed from the user's perspective. Therefore, it is necessary to determine the angle between the first projection screen 203 and the second projection screen 204, so as to determine the projection angle of the second projection content, as can be seen from fig. 2, the area occupied by the projection content 205 on the first projection screen 203 on the corresponding projection content 206 on the second projection screen 204 is much larger than the area occupied by the projection content 205 on the first projection screen 203, and it is conceivable that the first projection screen 203 and the second projection screen 204 need to be at an angle to ensure that the entire projection content corresponding to the projection content on the first projection screen 203 is projected on the second projection screen 204. Also, the angle of the first projection screen 203 and the second projection screen 204 affects the projection angle of the projection content projected onto the second projection screen 204. For example, in some embodiments, the first projection screen 203 is disposed in a vertical direction and the second projection screen 204 is disposed at a 45 degree angle to the first projection screen 203. After determining the angle between the first projection screen 203 and the second projection screen 204, the second projection angle may be determined based on the determined angle.
S104: and projecting the second projection content onto the second projection screen at a second projection angle, wherein holographic films are attached to the first projection screen and the second projection screen, and the first projection screen is a transparent screen.
In this embodiment, after the second projection angle is determined, the second projection content may be projected onto the second projection screen 204 at the second projection angle, where holographic films are attached to the first projection screen 203 and the second projection screen 204, and the first projection screen 203 is a transparent screen. In this way, a user located at one side of the first projection screen 203 can see the first projection content projected to the other side of the first projection screen 203 through the first projection screen 203, and can see the second projection content projected on the second projection screen 204, so that the first projection content and the second projection content are overlapped at the view angle of the user, and the stereoscopic impression of the first projection content is enhanced. In this embodiment, the first projection content includes a planar image to be projected on the first projection screen, and the second projection content includes a depth image corresponding to the first projection content and/or a bright-dark contrast image corresponding to the planar image and/or a shadow of a target in the planar image when the first projection content is viewed from a user viewing angle.
According to the holographic projection method, the plane images and the corresponding depth images and/or the bright-dark contrast images and/or shadows are respectively projected onto different projection screens through different projection equipment, and the projection contents on the different projection screens are enabled to be overlapped from the perspective of a user, so that the stereoscopic impression of the projected plane images is enhanced, and the user experience is improved.
Further, as an alternative embodiment of the present disclosure, in the above-described embodiment, the first projection content may be projected to any side of the first projection screen, and the second projection content may be projected to any side of the second projection screen, so that the position of the projection apparatus can be flexibly set.
As an optional embodiment of the disclosure, in the foregoing embodiment, further comprising synchronizing alignment of the first projection content and the second projection content based on a time axis in advance. Specifically, the first projection content and the second projection content can be respectively aligned with the time axis before projection, so that the first projection content and the second projection content can be synchronized only by projecting the first projection content and the second projection content at the same time during projection.
In the above embodiment, when the second projection angle is determined, the distortion correction may be further performed on the second projection content according to the second projection angle, so as to achieve a better projection effect. The method for correcting distortion can refer to the correction method in the prior art, and the description of this embodiment is not repeated.
Of course, in practical applications, according to practical requirements, user-defined content, such as an advertisement, or a user-defined sentence, or terminal screen content, or text information input by a terminal, needs to be projected on the first projection screen in some cases. At this time, the processor may receive third projection content uploaded by the terminal device (for example, a smart phone, a computer, etc.), and project the third projection content into a preset area on the first projection screen, while shielding the first projection content in the preset area. By the method, the third projection content projected on the first projection screen can be flexibly adjusted.
As another optional embodiment of the present disclosure, in the above embodiment, it includes:
And sending a synchronization instruction to the music playing device to enable the music playing device to play the background music synchronized with the first projection content.
It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present disclosure is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present disclosure. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all alternative embodiments, and that the acts and modules referred to are not necessarily required by the present disclosure.
The foregoing is a description of method embodiments, and the following further describes the aspects of the disclosure with reference to system embodiments. As shown in fig. 2, a schematic view of a projection process of a holographic projection system according to an embodiment of the present disclosure. Referring to fig. 2, the holographic projection system of the present embodiment includes:
A first projection device 201, a second projection device 202, a first projection screen 203, a second projection screen 204, and a processor (not shown); wherein, holographic films are attached to the first projection screen 201 and the second projection screen 202, and the first projection screen 201 is a transparent screen;
The first projection device 203 is configured to project the first projection content onto the first projection screen 201 at a first preset angle, the second projection device 202 is configured to project the second projection content onto the second projection screen 204 at a second projection angle, and the processor is configured to obtain the first projection content and the second projection content, and determine the second projection angle according to an angle between the second projection screen and the first projection screen.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the described modules may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.
According to embodiments of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium and a computer program product.
Fig. 3 shows a schematic block diagram of an electronic device 300 that may be used to implement the methods of embodiments of the present disclosure. As shown, the device 300 includes a Central Processing Unit (CPU) 301 that can perform various suitable actions and processes in accordance with computer program instructions stored in a Read Only Memory (ROM) 302 or loaded from a storage unit 308 into a Random Access Memory (RAM) 303. In the RAM 303, various programs and data required for the operation of the device 300 can also be stored. The CPU 301, ROM 302, and RAM 303 are connected to each other through a bus 304. An input/output (I/O) interface 305 is also connected to bus 304.
Various components in device 300 are connected to I/O interface 305, including: an input unit 306 such as a keyboard, a mouse, etc.; an output unit 307 such as various types of displays, speakers, and the like; a storage unit 308 such as a magnetic disk, an optical disk, or the like; and a communication unit 309 such as a network card, modem, wireless communication transceiver, etc. The communication unit 309 allows the device 300 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
The processing unit 301 performs the various methods and processes described above, which are tangibly embodied on a machine-readable medium, such as the storage unit 308. In some embodiments, part or all of the computer program may be loaded and/or installed onto the device 300 via the ROM 302 and/or the communication unit 309. When the computer program is loaded into RAM 703 and executed by CPU 301, one or more steps of the method described above may be performed. Alternatively, in other embodiments, CPU 301 may be configured to perform the above-described methods by any other suitable means (e.g., by means of firmware).
The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an Application Specific Standard Product (ASSP), a system on a chip (SOC), a load programmable logic device (CPLD), etc.
Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program code may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus such that the program code, when executed by the processor or controller, causes the functions/operations specified in the flowchart and/or block diagram to be implemented. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
Moreover, although operations are depicted in a particular order, this should be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.
Claims (10)
1. A holographic projection method, comprising:
Acquiring first projection content and second projection content, wherein the second projection content is used for enhancing the stereoscopic effect of the first projection content when projected;
projecting the first projection content onto a first projection screen at a first preset angle;
determining a second projection angle according to an included angle between the second projection screen and the first projection screen;
Projecting the second projection content onto the second projection screen at a second projection angle, so that a user positioned on one side of the first projection screen can see the first projection content projected onto the other side of the first projection screen and the second projection content projected onto the second projection screen through the first projection screen; the first projection screen and the second projection screen are stuck with holographic films, and the first projection screen is a transparent screen.
2. The holographic projection method of claim 1, in which the first projection content comprises a planar image to be projected onto the first projection screen, and the second projection content comprises a depth image corresponding to the first projection content and/or a contrast image corresponding to the planar image and/or a shadow of a target in the planar image when the first projection content is viewed from a user viewing angle.
3. The holographic projection method of claim 2, further comprising synchronizing alignment of the first projected content and the second projected content based on a time axis in advance.
4. The holographic projection method of claim 3, in which after determining the second projection angle, the method further comprises:
and carrying out distortion correction on the second projection content according to the second projection angle.
5. The holographic projection method of claim 4, further comprising:
And receiving third projection content uploaded by the terminal equipment, projecting the third projection content into a preset area on the first projection screen, and shielding the first projection content in the preset area.
6. The holographic projection method of claim 5, in which the third projection content comprises terminal projection content or text information entered by a terminal.
7. The holographic projection method of claim 6, further comprising:
And sending a synchronization instruction to the music playing device to enable the music playing device to play the background music synchronized with the first projection content.
8. A holographic projection system, comprising:
a first projection device, a second projection device, a first projection screen, a second projection screen, and a processor;
The first projection screen and the second projection screen are stuck with holographic films, and the first projection screen is a transparent screen;
The first projection device is used for projecting first projection content onto a first projection screen at a first preset angle, and the second projection device is used for projecting second projection content onto a second projection screen at a second projection angle, so that a user positioned at one side of the first projection screen can see the first projection content projected onto the other side of the first projection screen and the second projection content projected onto the second projection screen through the first projection screen; the processor is used for acquiring the first projection content and the second projection content and determining a second projection angle according to the included angle between the second projection screen and the first projection screen.
9. An electronic device comprising a memory and a processor, the memory having a program stored thereon, characterized in that the processor implements the holographic projection method of any of claims 1-7 when executing the program.
10. A computer-readable storage medium, on which a program is stored, characterized in that the program, when executed by a processor, implements the holographic projection method as claimed in any of claims 1 to 7.
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| JP2005010226A (en) * | 2003-06-16 | 2005-01-13 | Denso Corp | Hologram display device |
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Inventor after: Shi Xuan Inventor after: Kang Hua Inventor after: Wang Hongguang Inventor before: Wang Hongguang |
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