CN114019752A

CN114019752A - Holographic projection method and system

Info

Publication number: CN114019752A
Application number: CN202111349819.5A
Authority: CN
Inventors: 王红光
Original assignee: Beijing Mengtebo Intelligent Robot Technology Co ltd
Current assignee: Beijing Mengtebo Intelligent Robot Technology Co ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-02-08

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 being 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 a 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 pasted on the first projection screen and the second projection screen, and the first projection screen is a transparent screen. In this way, the three-dimensional effect of the projection content can be enhanced, the user requirements are met, and the user experience is improved.

Description

Holographic projection method and system

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 for recording and reproducing a true three-dimensional image of an object using the principles of interference and diffraction. The first step is to record object light wave information by using the interference principle, namely the shooting process: the shot object forms a diffused object beam under the irradiation of laser; the other part of laser beam is used as reference beam to irradiate the holographic film and is superposed with the object beam to generate interference, and the phase and amplitude of each point on the object light wave are converted into the intensity which is changed in space, so that the contrast and interval between interference fringes are used to record all information of the object light wave.

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 influenced.

Disclosure of Invention

In order to solve the above 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 being 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 a 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 pasted on 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 shadow of an object in a depth image and/or a contrast image and/or a planar image corresponding to the first projection content when the first projection content is viewed from a user viewing angle.

In some embodiments, the method further comprises performing synchronous alignment on the first projection content and the second projection 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:

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 projection content includes terminal screen projection 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:

the system comprises a first projection device, a second projection device, a first projection screen, a second projection screen and a processor;

holographic films are pasted on the first projection screen and the second projection screen, 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 the 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 having a computer program stored thereon and a 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 the method as described in the first aspect above.

It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.

By the holographic projection method, the three-dimensional effect of projection content can be enhanced, user requirements are met, and user experience is improved.

Drawings

The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. The accompanying drawings are included to provide a further understanding of the present disclosure, and are not intended to limit the disclosure thereto, and the same or similar reference numerals will be used to indicate the same or similar elements, where:

FIG. 1 shows a flow diagram of a holographic projection method according to an embodiment of the present disclosure;

FIG. 2 shows a schematic diagram 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

To make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

According to the holographic projection method, the plane image and the depth image and/or the light and dark contrast image and/or the shadow corresponding to the plane image are projected onto different projection screens through different projection equipment respectively, and the projection contents on the different projection screens are overlapped from the perspective of a user, so that the stereoscopic impression of the projected plane image is enhanced, and the user experience is improved.

Specifically, as shown in fig. 1, is a flowchart of a holographic projection method of an embodiment of the present disclosure. The holographic projection method of the embodiment comprises the following steps:

s101: obtaining 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 being projected.

The holographic projection method in this embodiment may be applied to a stage, a meeting, or other scenes, which are not listed in this embodiment. When the method of this embodiment is used for projection, first projection content needs to be obtained, specifically, first projection content and second projection content that need to be projected need to be obtained through a processor (e.g., a computer) connected to a projection device, where the first projection content is projection content including a flat image, and the second projection content includes a shadow of an object in a dark contrast image and/or a flat image corresponding to a depth image and/or a flat image corresponding to the first projection content when the first projection content is viewed from a user viewing angle. And the second projected content is for enhancing a stereoscopic effect of the first projected content when projected.

S102: and projecting the first projection content 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 view 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 through the first projection device 201 at a first preset angle. In this embodiment, the first preset angle may be determined according to actual needs, and in a general case, the first projection screen 203 is vertically disposed, but in some other embodiments of the present disclosure, the first projection screen 203 may also be disposed at an actually required angle according to actual needs. The present embodiment takes the first projection screen 203 vertically disposed as an example, and explains the technical solution of the present disclosure.

S103: and determining a second projection angle according to an included angle between a 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 which form a certain included angle, respectively, so that when viewed from a user, corresponding content on the first projection screen 203 and the second projection screen 204 can be overlapped, so that when viewed from the user, a stereoscopic effect of the first projection content on the first projection screen 203 can be improved. Therefore, an included angle between the first projection screen 203 and the second projection screen 204 needs to be determined, so as to determine a projection angle of the second projection content, as can be seen from fig. 2, an area occupied by the projection content 206 corresponding to the projection content 205 on the first projection screen 203 on the second projection screen 204 is much larger than an area occupied by the projection content 205 on the first projection screen 203, and it is understood that a certain angle is required between the first projection screen 203 and the second projection screen 204 to ensure that all the projection content corresponding to the projection content on the first projection screen 203 is projected on the second projection screen 204. Moreover, the included angle between the first projection screen 203 and the second projection screen 204 affects the projection included 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 the angle between first projection screen 203 and second projection screen 204 is determined, a 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 pasted on 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, wherein 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 on 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 superimposed at the user's viewing angle, 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 contrast image corresponding to the planar image and/or a shadow of an object in the planar image when the first projection content is viewed from a user viewing angle.

Furthermore, 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 present disclosure, in the above embodiment, the method further includes performing synchronous alignment on the first projection content and the second projection content in advance based on a time axis. Specifically, the first projection content and the second projection content can be respectively aligned with a time axis before projection, so that when projection is performed, synchronization of the first projection content and the second projection content can be achieved as long as the first projection content and the second projection content at the same time are projected.

As an optional embodiment of the present disclosure, in the above embodiment, after the second projection angle is determined, distortion correction may be performed on the second projection content according to the second projection angle, so as to achieve a better projection effect. Regarding the distortion correction method, reference may be made to a correction method in the prior art, and details of this embodiment are not repeated.

Of course, in practical applications, according to practical requirements, sometimes it is necessary to project user-defined content, such as advertisement, or user-defined sentence, or terminal screen projection content, or text information input by the terminal, on the first projection screen. At this time, the processor may receive third projection content uploaded by a terminal device (e.g., a smart phone, a computer, etc.), project the third projection content into a preset area on the first projection screen, and shield the first projection content in the preset area. Through the mode, the third projection content projected onto the first projection screen can be flexibly adjusted.

As another alternative embodiment of the present disclosure, in the above embodiment, the method includes:

It is noted that while for simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present disclosure is not limited by the order of acts, as some steps may, in accordance with the present disclosure, occur in other orders and concurrently. Further, those skilled in the art should also appreciate that the embodiments described in the specification are exemplary embodiments and that acts and modules referred to are not necessarily required by the disclosure.

The above is a description of method embodiments, and the following is a further description of the embodiments of the present disclosure by way of system embodiments. Fig. 2 is a schematic diagram 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 in the figures); holographic films are pasted on 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 included angle between the second projection screen and the first projection screen.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the described module may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.

The present disclosure also provides an electronic device, a readable storage medium, and a computer program product according to embodiments of the present disclosure.

FIG. 3 shows a schematic block diagram of an electronic device 300 that may be used to implement an embodiment method of the present disclosure. As shown, device 300 includes a Central Processing Unit (CPU)301 that may perform various appropriate 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 necessary for the operation of the device 300 can also be stored. The CPU 301, ROM 302, and RAM 303 are connected to each other via 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, or the like; an output unit 307 such as various types of displays, speakers, and the like; a storage unit 308 such as a magnetic disk, 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, which tangibly embodies a machine-readable medium, such as the storage unit 308, performs the various methods and processes described above. In some embodiments, part or all of the computer program may be loaded and/or installed onto device 300 via ROM 302 and/or communication unit 309. When the computer program is loaded into the RAM 703 and executed by the CPU 301, one or more steps of the method described above may be performed. Alternatively, in other embodiments, the CPU 301 may be configured to perform the above-described method in any other suitable manner (e.g., by way of firmware).

The functions described herein above 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), and the like.

Program code for implementing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes 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 codes, when executed by the processor or controller, cause the functions/operations specified in the flowchart and/or block diagram to be performed. 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. A 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.

Further, while 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. Under 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 limitations on the scope of the 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 disclosed as example forms of implementing the claims.

Claims

1. A holographic projection method, comprising:

2. The holographic projection method according to claim 1, wherein the first projection content includes a planar image to be projected on the first projection screen, and the second projection content includes a shadow of an object in a dark contrast image and/or a planar image corresponding to a depth image and/or a planar image corresponding to the first projection content when the first projection content is viewed from a user viewing angle.

3. The holographic projection method according to claim 2, further comprising performing synchronous alignment of the first projection content and the second projection content based on a time axis in advance.

4. The holographic projection method of claim 3, wherein after determining the second projection angle, the method further comprises:

5. The holographic projection method of claim 4, further comprising:

6. The holographic projection method of claim 5, wherein the third projection content comprises terminal screen projection content or text information input by a terminal.

7. The holographic projection method of claim 6, further comprising:

8. A holographic projection system, comprising:

9. An electronic device comprising a memory and a processor, the memory having a program stored thereon, wherein the processor, when executing the program, implements a holographic projection method as claimed in any of claims 1 to 7.

10. A computer-readable storage medium, on which a program is stored, which, when being executed by a processor, carries out a holographic projection method according to any one of claims 1 to 7.