CN111856776A - Holographic projection device - Google Patents
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- CN111856776A CN111856776A CN201910360409.7A CN201910360409A CN111856776A CN 111856776 A CN111856776 A CN 111856776A CN 201910360409 A CN201910360409 A CN 201910360409A CN 111856776 A CN111856776 A CN 111856776A
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Abstract
The holographic projection device of the present application includes: the curved surface projection unit is arranged on a display surface of a display device and used for receiving light rays carrying information of patterns displayed by the display device so as to form holographic images corresponding to the displayed patterns; at least one image acquisition unit; a processing unit, coupled to the image collecting unit and the display device, for identifying and enabling the image collecting unit to track a position of an observer of the hologram in the collected image, and controlling the display device to adjust a display pattern thereof, so as to provide a hologram of a three-dimensional model of an object at each of the viewing angles to the corresponding viewing angle of each of the positions of the observer; the equipment of this application is through surveying the holographic image content of observer position in order to provide corresponding visual angle, can realize that the observer is like observing the effect that the real object was observed around three-dimensional model, solves prior art's problem.
Description
Technical Field
The application relates to the technical field of image display, in particular to a holographic projection device.
Background
With the development and popularization of three-dimensional reconstruction technology, the way of digital three-dimensional display of objects is more and more, wherein a wider three-dimensional display way is a holographic projection technology for projecting an image on a transparent holographic plate by utilizing the reflection principle of light, and the method only needs transparent glass and a display, so that the method is low in cost and simple to implement, and is a preferred scheme for displaying a plurality of three-dimensional models.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, it is an object of the present application to provide a holographic projection device that enables an observer to observe around a three-dimensional model at different viewing angles, solving the problems of the prior art.
To achieve the above and other objects, the present application provides a holographic projection apparatus, comprising: the curved surface projection unit is arranged on a display surface of a display device and used for receiving light rays carrying information of patterns displayed by the display device so as to form holographic images corresponding to the displayed patterns; at least one image acquisition unit; and the processing unit is coupled with the image acquisition unit and the display device and is used for identifying and enabling the image acquisition unit to track the position of an observer of the holographic image in the acquired image, and controlling the display device to adjust the display pattern of the display device so as to provide the holographic image of the three-dimensional model of the object on each visual angle for each corresponding visual angle of each position of the observer.
In an embodiment of the present application, the holographic projection apparatus includes: the driving unit is used for driving the image acquisition unit to move; and the processing unit is coupled with the driving unit and is used for controlling the driving unit to drive the image acquisition unit to track the position of the observer.
In an embodiment of the present application, there are a plurality of image capturing units; and the processing unit is used for identifying and tracking the position of the observer in the combined view field of each image acquisition unit.
In an embodiment of the present application, the curved surface projection unit is a circular truncated cone, a circular cone, or a cylinder.
In an embodiment of the present application, the curved projection unit has a fixing portion for fixing to the display surface.
In an embodiment of the present application, the fixing manner of the fixing portion includes: adsorption or adhesion.
In an embodiment of the present application, the image capturing unit is disposed in the curved surface projecting unit.
In an embodiment of the application, the position of the observer is obtained by identifying a change in position of a relevant feature of a human body part including eyes in the image.
In one embodiment of the present application, the portion of the human body including the eye includes: the face.
In an embodiment of the present application, the display device includes: display screen of portable electronic terminal.
As described above, the hologram projection apparatus of the present application includes: the curved surface projection unit is arranged on a display surface of a display device and used for receiving light rays carrying information of patterns displayed by the display device so as to form holographic images corresponding to the displayed patterns; at least one image acquisition unit; a processing unit, coupled to the image collecting unit and the display device, for identifying and enabling the image collecting unit to track a position of an observer of the hologram in the collected image, and controlling the display device to adjust a display pattern thereof, so as to provide a hologram of a three-dimensional model of an object at each of the viewing angles to the corresponding viewing angle of each of the positions of the observer; the equipment of this application is through surveying the holographic image content of observer position in order to provide corresponding visual angle, can realize that the observer is like observing the effect that the real object was observed around three-dimensional model, solves prior art's problem.
Drawings
Fig. 1 is a schematic structural diagram of a holographic projection apparatus in an embodiment of the present application.
Fig. 2 is a schematic diagram showing an internal structure of a holographic projection apparatus in an embodiment of the present application.
Fig. 3 is an enlarged schematic view of a part of the components of the holographic projection apparatus in the embodiment of the present application.
Fig. 4 is a schematic circuit connection structure diagram of a holographic projection apparatus in an embodiment of the present application.
Fig. 5 is a schematic circuit diagram of a processing unit according to an embodiment of the present disclosure.
Detailed Description
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application and are not drawn according to the number, shape and size of the components in actual implementation, and the type, number and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
In the prior art, a holographic cabinet adopts a holographic pyramid structure to realize holographic imaging. Specifically, a holographic pyramid is a pyramid structure formed by splicing a plurality of transparent materials to form a central symmetric pyramid, and has a holographic viewing angle of 180 °, 270 °, or 360 ° according to the number of the side surfaces of the viewable surface.
In some embodiments, the holographic pyramid with a pyramid structure may also be replaced by a curved structure, such as a transparent structure with a conical, truncated, or cylindrical curved surface, but it is different from the holographic pyramid in the imaging manner.
Specifically, a transparent conical surface can be placed on a display with enough brightness, then the point of the eye position of an observer corresponds to the point reflected on the display through the conical surface one by one, a single picture to be displayed is reversely processed into a corresponding distortion diagram according to the corresponding relation after the corresponding relation is found, the distortion diagram is displayed on the display, and the picture displayed in the eyes of the observer after the distortion diagram is reflected through the conical surface is a normal image; and because the distance between each point on the curved surface and the eyes of the observer is not all the same through the reflection of the conical curved surface, a three-dimensional feeling is provided for the observer. The method has the advantages of simple hardware equipment and lower implementation cost, and can bring better viewing experience to observers compared with the traditional holographic cabinet.
However, this design has the disadvantage that the viewer is directed to the distorted image, and the viewer is required to manually rotate the display to direct the distorted image to the viewer to view the image. And because the display can only display one distortion map at a time to reflect through the transparent conical surface, the viewer still cannot observe around a real object as: the 3D model is stationary, and the observer can walk around the model to observe, and can obtain the images of the 3D model of the same object at different visual angles.
In view of the advantages of the curved surface projection scheme, the viewing effect of simulating real object observation can be achieved as long as the problem of how to follow the observer to perform corresponding imaging can be solved.
The technical scheme of the application is designed based on the idea of the invention, so that the corresponding holographic projection equipment is provided.
Please refer to fig. 1 and fig. 2. Fig. 1 is a schematic structural diagram of the holographic projection apparatus in the embodiment; as shown in fig. 2, a schematic diagram of an internal structure of the holographic projection apparatus in the embodiment is shown.
The holographic projection device includes: the device comprises a curved surface projection unit 2, at least one image acquisition unit 5 and a processing unit 6.
The curved surface projection unit 2 is disposed on a display surface of a display device 1, and is configured to receive light rays carrying information of the pattern 3 displayed by the display device 1, so as to form a holographic image corresponding to the display pattern 3.
In an embodiment, the curved projection unit 2 may be a conical curved structure as shown in the figure, for example, the vertex angle of the cone is 45 degrees; of course, the curved projection unit 2 may also be a truncated cone or a cylinder, and is not limited to a cone.
The curved projection unit 2 is made of transparent material, such as glass, acrylic, and the like, and can also be made of flexible transparent material, such as PVC plastic; an imaging space is formed inside the curved projection unit 2, and an observer 4 can see the hologram image in the imaging space.
In an embodiment, the display device 1 may be a display screen, and any electronic terminal carrying the display screen may be applied to the embodiment, for example, a large-sized, medium-sized, small-sized LED, OLED, LCD, and the like, where the display surface is a light emitting surface.
Optionally, the display device 1 may be a display screen of a portable electronic terminal, and the portable electronic terminal is, for example, a smart phone, a tablet computer, a notebook computer, and the like, and is convenient to carry and beneficial to displaying a hologram in various scenes.
The display surface of the display device 1 displays a deformed image, and the light emitted from the display device 1 carries information (such as color, phase, etc.) of the deformed image to the curved surface projection unit 2, so as to be converted into a normal holographic image for display.
Referring to fig. 2, the image capturing unit 5 is, for example, a camera, a video camera, or the like, and is used for capturing an image.
However, in order to realize the following of the observer 4, the image acquisition unit 5 needs to acquire an image including the eyes of the observer 4, and then the position of the observer 4 needs to be identified and tracked.
Optionally, in this embodiment, the image acquisition unit 5 is disposed in the curved surface projection unit 2, which is beneficial to being integrated in the same device on one hand; on the other hand, since the observation of the observer 4 is necessarily performed on the curved projection unit 2, the image capturing unit 5 disposed in the curved projection unit 2 is more favorable for capturing the image including the eyes of the observer 4.
Optionally, the image capturing unit 5 is preferably a fish-eye camera, and can capture a wider angle range.
In the present embodiment, as shown in fig. 2 and 3, the image capturing unit 5 is movably disposed, and the movement includes rotation.
Specifically, the image acquisition unit 5 is disposed on a rotatable rotating platform 7 located in the curved surface projection unit 2, and the rotating platform 7 can be driven by a driving unit 8 to drive the image acquisition unit 5 to rotate.
Alternatively, the driving unit 8 may be a motor, preferably a stepping motor, which can precisely control the rotation angle of the rotating platform 7; further optionally, the driving unit 8 can select a motor with moderate torque and small volume, and the small volume can be hidden in the curved surface projection unit 2 without affecting the projection display effect.
Correspondingly, the image acquisition unit 5 may also optionally select a wide-angle camera for the purpose of tracking the observer 4, so that the driving accuracy of the driving unit 8 is not required to be high.
In the present embodiment, the processing unit 6 is shown as a circuit module and is mounted on the rotating platform 7, but this is merely an example, and the processing unit 6 may be disposed at any position, and the structure of the present embodiment is not limited.
Fig. 4 is a schematic diagram of a circuit connection structure in the embodiment of the present application.
The processing unit 6, coupled to the image collecting unit 5, the driving unit 8 and the display device 1, is configured to identify and enable the image collecting unit 5 to track the position (preferably, the eye part, or other parts) of the observer 4 of the hologram in the collected image, and control the display device 1 to adjust the display pattern 3 thereof, so as to provide the hologram of the three-dimensional model of the object at each viewing angle to the corresponding viewing angle at each position of the observer 4.
In an embodiment, the position of the observer 4 is identified by identifying an image containing features of the observer 4 in the image collected by the image collecting unit 5, and optionally, the image contains an eye image of the observer 4, such as a face image.
The processing unit 6 receives and identifies the image transmitted by the image acquisition unit 5, and obtains the position of the observer 4 through image identification technologies based on human body biological feature identification, such as face identification, human eye identification and the like; the processing unit 6 can obtain the movement track of the same observer 4 by identifying the position change of the same observer 4 in several consecutive frames of images in an image sequence, and the processing unit 6 can control the driving unit 8 to drive the rotating table 7 to rotate along with the movement track, i.e. to track the observer 4.
The processing unit 6 sends a display instruction to the display device 1 to adjust the content and position of the display pattern 3, that is, to adjust the position and content of the displayed deformed image in accordance with the position of the observer 4, and then provides the observed content of the three-dimensional model of the same object to be observed at the position corresponding to the viewing angle at each position reached by the observer 4.
For example, when the observer 4 is identified as being in a first position, a hologram on the front side of the three-dimensional model is displayed, when the observer 4 moves around the three-dimensional model, a hologram on the side of the three-dimensional model corresponding to a different viewing angle is provided at a viewing angle corresponding to the position reached by each observer 4, and when the observer 4 reaches a second position opposite to the first position, a hologram on the back side of the three-dimensional model is provided to the observer 4, thereby achieving an effect of enabling the observer to observe around a three-dimensional model.
Optionally, in order to enable the holographic projection apparatus to be fixedly disposed on the display surface of the display device 1, the curved projection unit 2 further includes a base 9, which can be used as a fixing portion to be fixed on the display surface, and the fixing manner includes, but is not limited to, adsorption or adhesion; of course, the base 9 may not be fixed.
In some embodiments, without the base 9 being fixed on the display surface, the mass of the base 9 may be larger than that of the whole curved projection unit 2, so that the center of gravity of the whole curved projection unit 2 is lowered, which contributes to the stability of the device. Also, without the base 9 being fixed on the display surface, the rotating platform 7 and the base 9 may be printed by a 3D printer, and the material may be plastic, such as ABS plastic.
It should be noted that, although in the above-mentioned embodiment, only one image capturing unit 5 may be provided to track the position of the observer 4 by driving the image capturing unit to move, in other embodiments, a plurality of image capturing units 5 may be provided, and the combined viewing angle of the image capturing units 5 is used for tracking the position of the observer 4, so that in such an embodiment, the image capturing unit 5 is not required to move, and the driving unit 8 and the rotating table 7 in the above-mentioned embodiment may be omitted.
For example, assuming that there are A, B, C image-capturing elements 5, each oriented in a different direction and laterally as image-capturing element 5 in fig. 3, if A, B, C is uniformly arranged, they can cover a combined view of 360 degrees as long as their viewing angle is above 120 degrees, and the multiple image-capturing elements 5 may be more effective in real-time as the hologram changes with the viewer 4 than the single image-capturing element 5 moves to track the viewer 4.
In practical applications, a scheme of using a plurality of image capturing units 5 or a scheme of combining a single image capturing unit 5 with a driving motion may be selected according to practical effects and implementation cost considerations.
In some examples, the processing unit 6 may be implemented by hardware circuits, or by hardware circuits running a software program.
Fig. 5 is a schematic structural diagram of a processing unit 1000 according to an embodiment of the present disclosure.
The processing unit 1000 includes: a communicator 1001, a memory 1002, and a processor 1003.
It should be noted that the communicator 1001 is not necessarily limited to one circuit component, and may be a general term for a plurality of circuit components connected to each other or independent of each other.
Taking the processing unit in the embodiments of fig. 1 to 4 as an example, the communicator 1001 includes: the display device comprises a first interface circuit communicated with the image acquisition unit, a second interface circuit communicated with the driving unit and a third interface circuit communicated with the display device.
In some embodiments, the first interface circuit may be a USB, IEEE1394, or the like interface circuit; the second interface circuit may be an I2C bus interface or the like; the third interface circuit varies according to different TYPEs of the display device, for example, a USB interface capable of connecting with wired interface circuits such as Micro USB, Lightning Dock, TYPE C and the like on a corresponding smart phone or a tablet computer, or wireless interface circuits such as WiFi, 2G/3G/4G/5G, bluetooth and the like.
If the embodiment that a plurality of image capturing units realize tracking is taken as an example, the second interface circuit may be omitted.
The memory 1002 is used to store computer instructions.
In some embodiments, the memory 1002 may include, but is not limited to, high speed random access memory, non-volatile memory. Such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state storage devices.
The processor 1003, coupled to the communicator 1001 and the memory 1002, is configured to execute the computer instructions to implement the functions in the foregoing embodiments, for example:
the processing unit receives and identifies the image transmitted by the image acquisition unit, and the position of the observer is obtained through image identification technologies based on human body biological feature identification, such as face identification, human eye identification and the like; the processing unit can obtain the moving track of the same observer through the position change of the same observer identified in a plurality of continuous frames of images in an image sequence, and the processing unit can control the driving unit to drive the rotating platform to rotate along with the rotating platform, namely, the observer is tracked.
The processing unit sends a display instruction to the display device to adjust the content and position of the display pattern, that is, to adjust the position and content of the displayed abnormal figure following the position of the observer, and then provides the observed content of the three-dimensional model of the same object to be observed at the position corresponding to the viewing angle at each position reached by the observer.
In some embodiments, the Processor 1003 may be a general-purpose Processor, including one or more Central Processing Units (CPUs), Network Processors (NPs), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
In addition, various computer instructions for executing to perform the functions of the processing unit described above may be loaded onto a computer-readable storage medium, which may include, but is not limited to, floppy diskettes, optical disks, CD-ROMs (compact disk-read only memory), magneto-optical disks, ROMs (read-only memory), RAMs (random access memory), EPROMs (erasable programmable read-only memory), EEPROMs (electrically erasable programmable read-only memory), magnetic or optical cards, flash memory, or other type of media/machine-readable medium suitable for storing machine-executable instructions. The computer readable storage medium may be a product that is not accessed by the computer device or may be a component that is used by an accessed computer device.
In particular implementations, the computer instructions are routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types.
The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, computer instructions may be located in local and/or remote computer storage media including memory storage devices.
In addition, the above mentioned "coupling" in the above embodiments means that there is a channel through which energy can propagate from one medium to another medium, mainly referring to the conversion of electrical signals, which may be wired and/or wireless communication connection, which may be indirect and/or direct communication connection.
In summary, the holographic projection device of the present application includes: the curved surface projection unit is arranged on a display surface of a display device and used for receiving light rays carrying information of patterns displayed by the display device so as to form holographic images corresponding to the displayed patterns; at least one image acquisition unit; a processing unit, coupled to the image collecting unit and the display device, for identifying and enabling the image collecting unit to track a position of an observer of the hologram in the collected image, and controlling the display device to adjust a display pattern thereof, so as to provide a hologram of a three-dimensional model of an object at each of the viewing angles to the corresponding viewing angle of each of the positions of the observer; the equipment of this application is through surveying the holographic image content of observer position in order to provide corresponding visual angle, can realize that the observer is like observing the effect that the real object was observed around three-dimensional model, solves prior art's problem.
The application effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.
Claims (10)
1. A holographic projection device, comprising:
the curved surface projection unit is arranged on a display surface of a display device and used for receiving light rays carrying information of patterns displayed by the display device so as to form holographic images corresponding to the displayed patterns;
at least one image acquisition unit;
and the processing unit is coupled with the image acquisition unit and the display device and is used for identifying and enabling the image acquisition unit to track the position of an observer of the holographic image in the acquired image, and controlling the display device to adjust the display pattern of the display device so as to provide the holographic image of the three-dimensional model of the object on each visual angle for each corresponding visual angle of each position of the observer.
2. Holographic projection device of claim 1, comprising: the driving unit is used for driving the image acquisition unit to move;
and the processing unit is coupled with the driving unit and is used for controlling the driving unit to drive the image acquisition unit to track the position of the observer.
3. The holographic projection device of claim 1, wherein the image collecting unit is plural; and the processing unit is used for identifying and tracking the position of the observer in the combined view field of each image acquisition unit.
4. The holographic projection device of claim 1, wherein the curved projection unit is a circular truncated cone, a circular cone, or a cylindrical shape.
5. The holographic projection device of claim 1, wherein the curved projection unit has a fixing portion for fixing to the display surface.
6. The holographic projection device of claim 5, wherein the fixing means of the fixing portion comprises: adsorption or adhesion.
7. The holographic projection device of claim 1, wherein the image acquisition unit is disposed in the curved projection unit.
8. Holographic projection device of claim 1, in which the viewer's position is obtained by identifying a change in position of a relevant feature of a human body part of the image that includes the eye.
9. The holographic projection device of claim 8, in which the portion of the human body containing the eye comprises: the face.
10. The holographic projection device of claim 1, wherein the display device comprises: display screen of portable electronic terminal.
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| CN201910360409.7A CN111856776A (en) | 2019-04-30 | 2019-04-30 | Holographic projection device |
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| CN201910360409.7A CN111856776A (en) | 2019-04-30 | 2019-04-30 | Holographic projection device |
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Application publication date: 20201030 |