阅读说明：本技术 全息影像成像方法、全息投影设备、观测设备及系统 (Holographic image imaging method, holographic projection equipment, observation equipment and system ) 是由 王鑫 魏进武 杨子文 于 2021-09-14 设计创作，主要内容包括：本发明提供一种全息影像成像方法、全息投影设备、观测设备及系统,所述全息影像成像方法包括如下步骤：根据主用户以及预设区域内其他用户的位置信息确定全息投影成像的成像位置；根据所述成像位置进行全息影像成像,并在所述全息影像成像的外围区域增加具有空白口以及栅栏的虚拟光栅,其中,所述空白口对准所述主用户,所述栅栏的部分或全部对准所述其他用户；向观测设备同步所述成像位置。该方法、全息投影设备、观测设备及系统通过针对主用户和预设区域内的其他用户设置虚拟光栅,并且将虚拟光栅的空白口对准主用户,栅栏对准其他用户,使得只有主用户能看到360度全景,从而保护了主用户在使用全息视频时的隐私安全。(The invention provides a holographic image imaging method, holographic projection equipment, observation equipment and a system, wherein the holographic image imaging method comprises the following steps: determining the imaging position of holographic projection imaging according to the position information of the master user and other users in the preset area; performing holographic image imaging according to the imaging position, and adding a virtual grating with a blank opening and a fence in the peripheral area of the holographic image imaging, wherein the blank opening is aligned to the main user, and part or all of the fence is aligned to other users; synchronizing the imaging location to a viewing device. According to the method, the holographic projection equipment, the observation equipment and the system, the virtual grating is arranged aiming at the master user and other users in the preset area, the blank opening of the virtual grating is aligned to the master user, and the fence is aligned to other users, so that only the master user can see 360-degree panorama, and the privacy and safety of the master user when the master user uses the holographic video are protected.)

1. A holographic image imaging method is applied to holographic projection equipment, and is characterized by comprising the following steps:

determining the imaging position of holographic projection imaging according to the position information of the master user and other users in the preset area;

performing holographic image imaging according to the imaging position, and adding a virtual grating with a blank opening and a fence in the peripheral area of the holographic image imaging, wherein the blank opening is aligned to the main user, and part or all of the fence is aligned to other users;

synchronizing the imaging location to a viewing device.

2. The holographic imaging method of claim 1, wherein after synchronizing the imaging position to a viewing device, the method further comprises:

generating a group of random dynamic data, and sending the random dynamic data to the observation equipment;

on the basis of the imaging position, adding the random dynamic data to form a dynamic new imaging position;

and adjusting the holographic image according to the dynamic new imaging position, and enabling the virtual grating to surround the holographic image.

3. The method for imaging the hologram according to claim 2, wherein the determining the imaging position of the holographic projection imaging according to the position information of the primary user and the other users in the preset area specifically comprises:

determining the identity of the master user, and acquiring the position information of the master user and the other users;

determining the imaging size of the hologram, and acquiring an initial value D1 of the imaging position, wherein the initial value D1 has a positive correlation with the imaging size of the hologram;

acquiring the farthest distance D2 between the other users and the master user according to the position information of the master user and the other users;

determining the position with the distance D1+ D2 in front of the primary user as the imaging position.

4. The holographic imaging method of claim 3, wherein the adding the random dynamic data to form a dynamic new imaging position based on the imaging position comprises:

on the basis of the numerical value of D1+ D2, the random dynamic data are added one by one to form a dynamic current distance L, the position with the front distance of the main user being L serves as a dynamic new imaging position, and the dynamic new imaging position is located in the virtual raster.

5. The holographic imaging method of any of claims 1 to 4, wherein the virtual grating has a plurality of white slots and a plurality of gratings, the method further comprising:

when the main user moving direction is detected, a blank opening closest to the main user moving direction is aligned with the main user.

6. The hologram imaging method according to claim 5, wherein the number of fences is determined according to the number N of other users;

the width of a single fence is determined according to the farthest distance D2 between the other users and the main user;

the height of the virtual grating is determined according to the holographic image imaging height H, and the radius is determined according to the holographic image imaging width W.

7. The hologram imaging method according to any one of claims 1 to 4, wherein the virtual grating has a blank opening and a barrier;

the size of the blank opening is determined according to the number of the other users and the distance between the blank opening and the main user, the height of the virtual grating is determined according to the holographic imaging height H, and the radius is determined according to the holographic imaging width W;

and when the moving direction of the main user is detected, the blank port synchronously rotates along with the main user.

8. A holographic image observation method is applied to observation equipment and is characterized by comprising the following steps:

the method comprises the steps of synchronously receiving an imaging position sent by holographic projection equipment, wherein the imaging position is the imaging position of holographic projection imaging determined by the holographic projection equipment according to position information of a master user and other users in a preset area, carrying out holographic image imaging according to the imaging position, and sending the holographic image after adding a virtual grating with a blank opening and a fence in a peripheral area of the holographic image imaging, wherein the blank opening is aligned to the master user, and part or all of the fence is aligned to the other users.

9. The holographic viewing method of claim 8, wherein after synchronously receiving the imaging location sent by the holographic projection device, the method further comprises:

receiving random dynamic data sent by the holographic projection equipment;

and carrying out zoom compensation according to the imaging position and the random dynamic data.

10. The holographic viewing method of claim 9, wherein the zoom compensation is determined by the following formula:

f is transverse-wL/W, and f is longitudinal-hL/H;

wherein, the f transverse direction is a transverse zoom multiple, the f longitudinal direction is a longitudinal zoom multiple, W is a holographic projection imaging width, L is a sum of a distance between the imaging position and the observation device and the random dynamic data, H is a holographic projection imaging height, and W and H are fixed parameters related to the imaging screen of the observation device.

11. A holographic projection device, comprising:

the positioning module is used for determining the imaging position of holographic projection imaging according to the position information of the master user and other users in the preset area;

the encrypted projection module is connected with the positioning module and used for carrying out holographic image imaging according to the imaging position and adding a virtual grating with a blank opening and a fence in the peripheral area of the holographic image imaging, wherein the blank opening is aligned to the main user, and part or all of the fence is aligned to other users;

and the first communication module is connected with the positioning module and used for synchronizing the imaging position to observation equipment.

12. An observation device, comprising:

the second communication module is used for synchronously receiving the imaging position sent by the holographic projection equipment, wherein the imaging position is sent by the holographic projection equipment after the holographic projection equipment determines the imaging position of holographic projection imaging according to the position information of a master user and other users in a preset area, holographic image imaging is carried out according to the imaging position, and a virtual grating with a blank opening and a fence is added in the peripheral area of the holographic image imaging, wherein the blank opening is aligned with the master user, and part or all of the fence is aligned with the other users.

13. A holographic imaging system, comprising: a holographic projection device and an observation device;

the holographic projection device is used for executing the holographic image forming method of any one of claims 1 to 7;

the observation apparatus is used for executing the holographic image observation method of any one of claims 8 to 10.

Technical Field

The invention relates to the technical field of holographic images, in particular to a holographic image imaging method, holographic projection equipment, observation equipment and a system.

Background

Different from the prior 180-degree two-dimensional video display, the holographic image is 360 degrees in space

The three-dimensional display has 3D stereoscopic impression and sense of reality, improves user experience, and simultaneously, the user can observe the holographic image from various angles.

However, for holograms requiring privacy protection, such as holographic projection for video communications on a user's mobile phone, the privacy of a 360 ° displayed hologram may be compromised.

In the means for realizing privacy protection of the holographic image in the prior art, if the holographic image is directly blocked by a hardware fence, the 360-degree panoramic experience is poor; by means of software image processing, a method of blocking or coding partial privacy points still cannot ensure privacy security of the whole image.

Disclosure of Invention

The present invention provides a holographic image imaging method, a holographic projection device, an observation device and a system, to solve the above-mentioned problem in the prior art, so as to solve the problem that the privacy security of the holographic image cannot be protected while the holographic image stereoscopic projection is realized in the prior art.

In a first aspect, the present invention provides a holographic imaging method applied to a holographic projection device, the method comprising the steps of:

determining the imaging position of holographic projection imaging according to the position information of the master user and other users in the preset area;

performing holographic image imaging according to the imaging position, and adding a virtual grating with a blank opening and a fence in the peripheral area of the holographic image imaging, wherein the blank opening is aligned to the main user, and part or all of the fence is aligned to other users;

synchronizing the imaging location to a viewing device.

Preferably, after synchronizing the imaging position to the observation device, the method further comprises:

generating a group of random dynamic data, and sending the random dynamic data to the observation equipment;

on the basis of the imaging position, adding the random dynamic data to form a dynamic new imaging position;

and adjusting the holographic image according to the dynamic new imaging position, and enabling the virtual grating to surround the holographic image.

Preferably, the determining the imaging position of the holographic projection imaging according to the position information of the master user and the other users in the preset area specifically includes:

determining the identity of the master user, and acquiring the position information of the master user and the other users;

determining the imaging size of the hologram, and acquiring an initial value D1 of the imaging position, wherein the initial value D1 has a positive correlation with the imaging size of the hologram;

acquiring the farthest distance D2 between the other users and the master user according to the position information of the master user and the other users;

determining the position with the distance D1+ D2 in front of the primary user as the imaging position.

Preferably, the adding the random dynamic data to form a dynamic new imaging position on the basis of the imaging position specifically includes:

on the basis of the numerical value of D1+ D2, the random dynamic data are added one by one to form a dynamic current distance L, the position with the front distance of the main user being L serves as a dynamic new imaging position, and the dynamic new imaging position is located in the virtual raster.

Preferably, the virtual raster has a plurality of blank openings and a plurality of fences, and the method further includes:

when the main user moving direction is detected, a blank opening closest to the main user moving direction is aligned with the main user.

Preferably, the number of fences is determined according to the number N of other users;

the width of a single fence is determined according to the farthest distance D2 between the other users and the main user;

the height of the virtual grating is determined according to the holographic image imaging height H, and the radius is determined according to the holographic image imaging width W.

Preferably, the virtual grating has a blank opening and a barrier;

the size of the blank opening is determined according to the number of the other users and the distance between the blank opening and the main user, the height of the virtual grating is determined according to the holographic imaging height H, and the radius is determined according to the holographic imaging width W;

and when the moving direction of the main user is detected, the blank port synchronously rotates along with the main user.

In a second aspect, the present invention provides a holographic image observation method, applied to an observation device, the method including the steps of:

the method comprises the steps of synchronously receiving an imaging position sent by holographic projection equipment, wherein the imaging position is the imaging position of holographic projection imaging determined by the holographic projection equipment according to position information of a master user and other users in a preset area, carrying out holographic image imaging according to the imaging position, and sending the holographic image after adding a virtual grating with a blank opening and a fence in a peripheral area of the holographic image imaging, wherein the blank opening is aligned to the master user, and part or all of the fence is aligned to the other users.

Preferably, after the synchronous receiving of the imaging position sent by the holographic projection device, the method further comprises:

receiving random dynamic data sent by the holographic projection equipment;

and carrying out zoom compensation according to the imaging position and the random dynamic data.

Preferably, the zoom compensation determines a zoom factor by the following equation:

f is transverse-wL/W, and f is longitudinal-hL/H;

wherein, the f transverse direction is a transverse zoom multiple, the f longitudinal direction is a longitudinal zoom multiple, W is a holographic projection imaging width, L is a sum of a distance between the imaging position and the observation device and the random dynamic data, H is a holographic projection imaging height, and W and H are fixed parameters related to the imaging screen of the observation device.

In a third aspect, the present invention provides a holographic projection device comprising:

the positioning module is used for determining the imaging position of holographic projection imaging according to the position information of the master user and other users in the preset area;

the encrypted projection module is connected with the positioning module and used for carrying out holographic image imaging according to the imaging position and adding a virtual grating with a blank opening and a fence in the peripheral area of the holographic image imaging, wherein the blank opening is aligned to the main user, and part or all of the fence is aligned to other users;

and the first communication module is connected with the positioning module and used for synchronizing the imaging position to observation equipment.

In a fourth aspect, the present invention provides an observation apparatus comprising:

the second communication module is used for synchronously receiving the imaging position sent by the holographic projection equipment, wherein the imaging position is sent by the holographic projection equipment after the holographic projection equipment determines the imaging position of holographic projection imaging according to the position information of a master user and other users in a preset area, holographic image imaging is carried out according to the imaging position, and a virtual grating with a blank opening and a fence is added in the peripheral area of the holographic image imaging, wherein the blank opening is aligned with the master user, and part or all of the fence is aligned with the other users.

In a fifth aspect, the present invention provides a holographic imaging system, comprising: a holographic projection device and an observation device;

the holographic projection device is used for executing the holographic image imaging method;

the observation device is used for executing the holographic image observation method.

According to the holographic image imaging method, the holographic projection equipment, the observation equipment and the system, the imaging position of holographic projection imaging is determined according to the position information of the master user and other users in a preset area; further, holographic image imaging is carried out according to the imaging position, and a virtual grating with a blank opening and a fence is added in the peripheral area of the holographic image imaging, wherein the blank opening is aligned to the main user, and part or all of the fence is aligned to other users; then synchronizing the imaging positions to a viewing device; the method and the device have the advantages that the imaging positions are determined and the virtual grating is arranged for the main user and other users in the preset area, and the other users except the main user are prevented from watching the holographic image through the virtual grating, so that the privacy safety of the holographic image used by the main user is protected, and the problem that the privacy safety of the holographic image cannot be protected while the holographic image stereoscopic projection is realized in the prior art is solved.

Drawings

FIG. 1 is a flowchart of a hologram imaging method according to embodiment 1 of the present invention;

FIG. 2 is a scene diagram of a holographic imaging method according to an embodiment of the present invention;

FIG. 3 is a flowchart of a holographic image observation method according to embodiment 2 of the present invention;

FIG. 4 is a schematic structural diagram of a holographic projection apparatus according to embodiment 3 of the present invention;

FIG. 5 is a schematic structural diagram of an observation device according to embodiment 4 of the present invention;

fig. 6 is a schematic structural diagram of a holographic image system according to embodiment 5 of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description will be made with reference to the accompanying drawings.

It is to be understood that the specific embodiments and figures described herein are merely illustrative of the invention and are not limiting of the invention.

It is to be understood that the embodiments and features of the embodiments can be combined with each other without conflict.

It is to be understood that, for the convenience of description, only parts related to the present invention are shown in the drawings of the present invention, and parts not related to the present invention are not shown in the drawings.

It should be understood that each unit and module related in the embodiments of the present invention may correspond to only one physical structure, may also be composed of multiple physical structures, or multiple units and modules may also be integrated into one physical structure.

It will be understood that, without conflict, the functions, steps, etc. noted in the flowchart and block diagrams of the present invention may occur in an order different from that noted in the figures.

It is to be understood that the flowchart and block diagrams of the present invention illustrate the architecture, functionality, and operation of possible implementations of systems, apparatus, devices and methods according to various embodiments of the present invention. Each block in the flowchart or block diagrams may represent a unit, module, segment, code, which comprises executable instructions for implementing the specified function(s). Furthermore, each block or combination of blocks in the block diagrams and flowchart illustrations can be implemented by a hardware-based system that performs the specified functions or by a combination of hardware and computer instructions.

It is to be understood that the units and modules involved in the embodiments of the present invention may be implemented by software, and may also be implemented by hardware, for example, the units and modules may be located in a processor.

Example 1:

as shown in fig. 1, an embodiment 1 of the present invention provides a hologram imaging method applied to a holographic projection apparatus, where the method includes the following steps:

and S11, determining the imaging position of the holographic projection imaging according to the position information of the main user and other users in the preset area.

The embodiment can be understood by referring to fig. 2 specifically, and fig. 2 illustrates a holographic projection system and a projection method of the holographic projection system of the present invention, where the system mainly includes: holographic projection device 1, observation device 2, primary user 3, other users 4 (only one of which is illustrated in the figure), hologram 5, virtual grating 6.

In a specific embodiment, the determining an imaging position of holographic projection imaging according to position information of a master user and other users in a preset area specifically includes:

and determining the identity of the master user, and acquiring the position information of the master user and the other users.

Specifically, in the system shown in fig. 2, the holographic projection device 1 has a function of acquiring location information of a master user 3 and other users 4 in a preset area, the holographic projection device first needs to determine the identity of the master user 3, specifically, it may determine who is authorized to view the holographic image 5 by face recognition, wearing a bracelet, infrared sensing, an account password, and the like, after determining the identity of the master user 3, so as to facilitate the master user 3 to view the holographic image 5, determine a preset area, determine whether other users 4 are present in the preset area, count the number of other users 4 to be N, measure and obtain distances and directions of the master user 3 and other users 4 relative to the holographic projection device 1 by a ranging module built in the holographic projection device 1, and determine location information thereof in a location coordinate manner.

Determining the imaging size of the hologram, and acquiring an initial value D1 of the imaging position, wherein the initial value D1 is in positive correlation with the imaging size of the hologram.

Specifically, in order to make the other users 4 unable to clearly observe the hologram 5, the imaging size of the hologram 5 is determined to be relatively small, and the specific size may be set empirically without limitation, and after the imaging size of the hologram 5 is determined, the initial value D1 of the imaging position of the hologram 5 is further acquired, and the acquisition method of the initial value D1 may be specifically determined in such a manner that the height and the width of the imaging size of the hologram 5 are positively correlated, for example:

D1＝b*F(H)*Y(W)，

where b is a coefficient, H is the imaging height of the hologram 5, W is the imaging width of the hologram 5, F, Y are monotonically increasing functions, such as lg function, and the unit of D1 is in meters.

And acquiring the farthest distance D2 between the other users and the master user according to the position information of the master user and the other users.

Specifically, after the position information of the master user 3 and the other users 4 is determined according to the position coordinates, the distances between all the other users 4 present and the master user 3 are calculated according to the position coordinates, and the farthest one of the distances is selected as the value of D2, if there is no other user 4 in the field, that is, if N is 0, then D2 is 0.

Determining the position with the distance D1+ D2 in front of the primary user as the imaging position.

Specifically, with D1 m directly in front of the main user as an initial value, if some other user 4 on the scene is farthest from the main user 3 by D2 m, the imaging position continues to move forward by D2 m, and the position where the imaging position is at the front of the main user 3 by D1+ D2 is determined.

And S12, carrying out holographic image imaging according to the imaging position, and adding a virtual grating with a blank opening and a fence in the peripheral area of the holographic image imaging, wherein the blank opening is aligned with the main user, and part or all of the fence is aligned with other users.

In the embodiment, when the hologram 5 is imaged, the virtual grating 6 is additionally added, the virtual grating 6 surrounds the hologram 5, and is directly formed by the holographic projection device 1 by adopting a holographic imaging technology and is synchronously released with the image of the hologram 5, the virtual grating 6 has a blank opening and a fence, the blank opening is aligned with the master user 3, the fence is aligned with the other users 4, so that the master user 3 can watch the hologram 5 through the blank opening, and the sight lines of the other users 4 are possibly blocked by the fence.

In a specific embodiment, as shown in fig. 2, the virtual raster 6 has a plurality of blank ports and a plurality of fences, and the method further includes: when the moving direction of the primary user 3 is detected, a blank opening closest to the moving direction of the primary user 3 is aligned with the primary user 3.

When the main user 3 moves in the direction, one of the blank openings is aligned with the main user 3 by rotating the virtual grating 6, so that the main user can observe the holographic image 5 through the blank opening when walking to the back and the side, and only one blank opening closest to the main user 3 in the moving direction needs to be rotated for the minimum rotating amplitude.

In a more specific embodiment, the number of fences is determined according to the number N of other users 4; the width of a single fence is determined according to the farthest distance D2 between the other users 4 and the main user 3; the height of the virtual grating 6 is determined according to the imaging height H of the hologram 5, and the radius is determined according to the imaging width W of the hologram 5.

Specifically, the virtual grating 6 surrounds the hologram 5 in 360 degrees, and the height and radius of the virtual grating 6 are determined according to the size of the hologram 5, for example:

H1＝a1*H，R1＝a2*W，

wherein H1 is the height of the virtual grating 6, a1 is a coefficient, H is the imaging height of the hologram 5, R1 is the radius of the virtual grating 6, a2 is a coefficient, W is the imaging width of the hologram 5, and a1 and a2 can be set to values according to experience;

the virtual grating 6 has the number of blank openings corresponding to the number of fences, the fences are distributed at equal intervals, the fences are used for blocking other users 4 from viewing the holographic image 5, so the number of fences can be determined according to the number N of other users 4 in the field, the width of a single fence is determined according to the farthest distance D2 between the other users 4 and the main user 3, and the width and the number of fences also determine the width of the blank openings, for example:

N1＝a3*N，W1＝a4*D2，

wherein N1 is the number of fences of the virtual raster 6, a3 is a coefficient, N is the number of other users 4 in the preset area, W1 is the width of a single fence of the virtual raster 6, a4 is a coefficient, D2 is the farthest distance of the main user 3 of the other users 4 in the preset area, and a3 and a4 can be set to take values according to experience.

In another specific embodiment, the virtual raster has a blank port and a barrier; the size of the blank opening is determined according to the number of the other users and the distance between the blank opening and the main user, the height of the virtual grating is determined according to the holographic imaging height H, and the radius is determined according to the holographic imaging width W; and when the moving direction of the main user is detected, the blank port synchronously rotates along with the main user.

In particular, unlike the virtual raster 6 shown in fig. 2, the virtual raster may be a largely closed barrier (i.e. corresponding to a very wide circular-arc-shaped barrier), in the direction of the primary user, the two ends of the barrier are open to form a blank opening, the blank opening is determined according to the number of the other users and the distance between the other users and the main user, if the number of the other users is large and the other users are close to the main user, the blank space is set smaller and vice versa, which may be empirically set, the height and radius of the virtual raster may be set according to the same method as in the previous embodiment, when the master user moves in the direction, the blank opening moves synchronously along with the master user, can be imagined as a revolving door, the blank opening always faces the master user, therefore, the holographic image can be seen by the people in the main user direction, and observers in other directions are shielded and separated for observation.

And S13, synchronizing the imaging position to the observation equipment.

In this embodiment, after the hologram 5 is put in the holographic projection device 1, the imaging position of the hologram 5 is synchronously sent to the observation device 2, so that the master user 3 observes the clear hologram 5 through the observation device 2.

In a specific embodiment, after synchronizing the imaging position to the observation device, the method further comprises: generating a group of random dynamic data, and sending the random dynamic data to the observation equipment; on the basis of the imaging position, adding the random dynamic data to form a dynamic new imaging position; and adjusting the holographic image according to the dynamic new imaging position, and enabling the virtual grating to surround the holographic image.

Specifically, the holographic projection device 1 generates a set of random dynamic data, and sends the random dynamic data to the observation device 2 through the communication module, the observation device 2 can synchronously know a new imaging position according to the original imaging position and the random dynamic data on the premise that the original imaging position is known, and the holographic projection device 1 regularly adds the random dynamic data on the basis of the original imaging position, so that the holographic image 5 is continuously changed into the new imaging position, and the holographic image 5 is prevented from being observed by other users 4.

In a more specific embodiment, the adding the random dynamic data to form a dynamic new imaging position based on the imaging position specifically includes: on the basis of the numerical value of D1+ D2, the random dynamic data are added one by one to form a dynamic current distance L, the position with the front distance of the main user being L serves as a dynamic new imaging position, and the dynamic new imaging position is located in the virtual raster.

Specifically, the random dynamic data forms a fine adjustment of the imaging position of the hologram 5, for example, D1 is 8 meters, D2 is 0.3 meters, the random dynamic data is [0.6, 0.3, -0.4, 0.2 … … ], the current distance L is [8.9, 8.6, 7.9, 8.5 … … ] in order, the projection is performed according to the positions [8.9, 8.6, 7.9, 8.5 … … ] in order from the front of the primary user 3, and the hologram 5 is always located in the enclosure of the virtual grating 6 while the imaging position of the hologram 5 is changed by the fine adjustment, so that the holographic video privacy of the primary user 3 is well protected from being peeped by other users 4 at the present.

The embodiment 1 of the present invention provides a hologram 5 imaging method applied to a holographic projection device 1, which has the following beneficial effects:

determining the imaging position of the holographic image 5 according to the master user 3 and other users 4 in the preset area, adding the virtual grating 6 on the periphery of the master user 3 while putting the holographic image 5, aligning a blank opening of the virtual grating 6 to the master user 3, aligning the fence to the other users 4, and using the virtual grating 6 with intervals to realize the shielding of the holographic image 5 so as to ensure the privacy safety of the holographic video of the master user 3;

by dynamically changing the projection position of the holographic image 5, only the master user 3 can observe the clear holographic image 5 by using the observation device 2, and other users 4 except the master user 3 cannot observe the clear holographic image 5 even by using similar observation devices because the other users do not know the dynamic current projection position, so that the privacy of the master user 3 when using the holographic video is protected;

the width and the density of the fence of the virtual grating 6 which can be dynamically changed are increased for the holographic image 5 through the position and the number information of the master user 3 and other users 4 in the preset area, so that the holographic image 5 can be observed only by the master user 3.

According to the holographic image imaging method provided by the embodiment of the invention, the imaging position of holographic projection imaging is determined according to the position information of the master user and other users in the preset area; further, holographic image imaging is carried out according to the imaging position, and a virtual grating with a blank opening and a fence is added in the peripheral area of the holographic image imaging, wherein the blank opening is aligned with the main user, and part or all of the fence is aligned with other users; then synchronizing the imaging positions to a viewing device; the method and the device have the advantages that the imaging positions are determined and the virtual grating is arranged for the main user and other users in the preset area, and the other users except the main user are prevented from watching the holographic image through the virtual grating, so that the privacy safety of the holographic image used by the main user is protected, and the problem that the privacy safety of the holographic image cannot be protected while the holographic image stereoscopic projection is realized in the prior art is solved.

Example 2:

as shown in fig. 3, embodiment 2 of the present invention provides a holographic image observation method, which is applied to an observation device, and the method includes the following steps:

s21, synchronously receiving an imaging position sent by holographic projection equipment, wherein the imaging position is sent by the holographic projection equipment after the holographic projection equipment determines the imaging position of holographic projection imaging according to the position information of a master user and other users in a preset area, and carries out holographic image imaging according to the imaging position, and adds a virtual grating with a blank opening and a fence in the peripheral area of the holographic image imaging, wherein the blank opening is aligned with the master user, and part or all of the fence is aligned with the other users.

The present embodiment can still be understood in conjunction with fig. 2, in which the observation device 2 synchronously receives the imaging positions of the holograms 5 transmitted by the hologram projection device 1, so that the master user 3 observes the holograms 5 through the observation device 2.

In a specific embodiment, after synchronously receiving the imaging positions sent by the holographic projection device, the method further comprises: receiving random dynamic data sent by the holographic projection equipment; and carrying out zoom compensation according to the imaging position and the random dynamic data.

Specifically, the master user 3 observes the hologram 5 using the observation device 2, the hologram 5 continuously changes a new imaging position based on the original imaging position according to random dynamic data, the changing rule is fixed, after the observation device 2 receives the random dynamic data, zoom compensation is performed according to the rule, so that the master user 3 observes the hologram 5 which is always clear through the observation device 2, for example, on the basis of embodiment 1, D1 is 8 meters, D2 is 0.3 meters, the random dynamic data is [0.6, 0.3, -0.4, 0.2 … … ], the current distance L is [8.9, 8.6, 7.9, 8.5 … … ] in sequence, projection is performed according to positions [8.9, 8.6, 7.9, 8.5 … … ] in sequence in front of the master user 3, the imaging position of the hologram 5 is changed by fine adjustment, the observation device 2 changes the imaging position of the hologram 5 according to the distance [8.9, 8.6, 7.9, 8.5 … … ] so that the zoom-enlarged hologram 5 appears in front of the primary user 3, and the other users 4 have difficulty in observing the hologram 5 at all times because they do not know the dynamic zoom distance.

In a more specific embodiment, the zoom compensation determines the zoom factor from the following equation:

f is transverse-wL/W, and f is longitudinal-hL/H;

wherein, the f transverse direction is a transverse zoom multiple, the f longitudinal direction is a longitudinal zoom multiple, W is an imaging width of the holographic projection 5, L is a sum of a distance between the imaging position and the observation device 2 and the random dynamic data, H is an imaging height of the holographic projection 5, and W and H are fixed parameters related to an imaging screen of the observation device 2.

Example 3:

as shown in fig. 4, embodiment 3 of the present invention provides a hologram projection apparatus 1 including:

the positioning module 11 is used for determining the imaging position of the holographic projection 5 according to the position information of the master user 3 and other users 4 in the preset area;

the encryption projection module 12 is connected with the positioning module 11, and is configured to image the hologram 5 according to the imaging position, and add a virtual grating 6 having a blank opening and a fence in a peripheral area where the hologram 5 is imaged, where the blank opening is aligned with the master user 3, and part or all of the fence is aligned with the other users 4;

a first communication module 13, connected to the positioning module 11, for synchronizing the imaging position to the observation device 2.

In a particular embodiment, the holographic projection device 1 further comprises:

the dynamic adjusting module is connected with the positioning module 11, the encryption projection module 12 and the first communication module 13, and is configured to generate a set of random dynamic data, and add the random dynamic data to form a new dynamic imaging position on the basis of the imaging position;

the encrypted projection module 12 is further configured to adjust the hologram 5 according to the new dynamic imaging position, and make the virtual grating 6 surround the hologram 5;

the first communication module 13 is further configured to send the random dynamic data to the observation device 2.

Example 4:

as shown in fig. 5, embodiment 4 of the present invention provides an observation apparatus 2 including:

the second communication module 21 is configured to synchronously receive an imaging position sent by the holographic projection device 1, where the imaging position is sent by the holographic projection device 1 after the holographic projection device 1 determines an imaging position of the holographic projection 5 according to the position information of the master user 3 and the other users 4 in the preset area, performs imaging of the holographic image 5 according to the imaging position, and adds a virtual grating 6 having a blank opening and a fence in a peripheral area of the imaged holographic image 5, where the blank opening is aligned with the master user 3, and part or all of the fence is aligned with the other users 4.

In a specific embodiment, the second communication module 21 is further configured to receive random dynamic data sent by the holographic projection apparatus 1, where the random dynamic data is used for the holographic projection apparatus 1 to add random dynamic data one by one on the basis of the imaging position to form a dynamic new imaging position, adjust the hologram 5 according to the dynamic new imaging position, and make the virtual grating 6 surround the hologram 5;

the observation device 2 further comprises: and the zooming imaging lens is connected with the second communication module 21 and is used for zooming compensation according to the imaging position and the random dynamic data.

Example 5:

as shown in fig. 6, embodiment 5 of the present invention provides a hologram image system including: a holographic projection device 1 and an observation device 2;

the holographic projection device 1 is used for executing the holographic image forming method in embodiment 1;

the observation apparatus 2 is used to perform the hologram observation method according to embodiment 2.

Specifically, since embodiments 3 and 4 are apparatuses corresponding to embodiments 1 and 2, a hologram system provided in embodiment 5 of the present invention may include: a holographic projection device 1 as described in embodiment 3 and a viewing device 2 as described in embodiment 4.

In the holographic image imaging method, the holographic projection device, the observation device, and the system provided in embodiments 2 to 5, an imaging position of holographic projection imaging is determined according to position information of a master user and other users in a preset area; further, holographic image imaging is carried out according to the imaging position, and a virtual grating with a blank opening and a fence is added in the peripheral area of the holographic image imaging, wherein the blank opening is aligned to the main user, and part or all of the fence is aligned to other users; then synchronizing the imaging positions to a viewing device; the method and the device have the advantages that the imaging positions are determined and the virtual grating is arranged for the main user and other users in the preset area, and the other users except the main user are prevented from watching the holographic image through the virtual grating, so that the privacy safety of the holographic image used by the main user is protected, and the problem that the privacy safety of the holographic image cannot be protected while the holographic image stereoscopic projection is realized in the prior art is solved.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.