CN108093201B - Video conference terminal and system - Google Patents
Video conference terminal and system Download PDFInfo
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- CN108093201B CN108093201B CN201810069356.9A CN201810069356A CN108093201B CN 108093201 B CN108093201 B CN 108093201B CN 201810069356 A CN201810069356 A CN 201810069356A CN 108093201 B CN108093201 B CN 108093201B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
Abstract
The invention belongs to the technical field of videos, and particularly relates to a video conference terminal and a video conference system. The terminal comprises a projector, a transparent holographic projection screen and a camera. The projector receives a video signal from the other side, converts the video signal into a projection beam and projects the projection beam onto the holographic projection screen; in addition, the camera provided by the invention is arranged on the same horizontal line with the eyes of the user and can shoot the catch of the user, so that both sides of the video conference can watch the mutual catch state on the holographic projection screen, and the near-real catch communication is realized. Therefore, the invention solves the problem that the existing video conference system can not carry out eye-to-eye communication.
Description
Technical Field
The invention belongs to the technical field of videos, and particularly relates to a video conference terminal and a video conference system.
Background
With existing video conferencing systems, video conference participants can communicate with each other by transmitting audio or video signals.
The existing video conference system is characterized in that the camera is generally arranged above or below the display screen, and the camera can not be blocked by the display screen when a user watches the display screen, so that the user can be shot. However, in this case, since the camera is generally located above or below the display screen, the user's sight is directly looking at the display screen rather than at the camera, and the gaze of the user photographed by the camera is oblique. For example, when a mobile phone is used for video communication, a user often looks directly at the screen of the mobile phone, and the camera is located above the screen of the mobile phone, so that the line of sight of the user is inclined. The mobile phone screen is small, so that the sense of inclination of the sight line is not obvious, and when a video conference is carried out, the display screen is large generally, so that the display proportion of a user on the display screen is large, the eye inclination condition can be amplified and is very visual, and therefore, two parties of the conference can not accurately communicate with each other actually.
In addition, the existing video conference system often has a long distance between the user and the display screen/camera, so that when the user's sight line is inclined, the inclination effect finally displayed on the display screen is not obvious due to the long distance. However, due to the long distance, the two parties in the conference can not actually achieve the effect of a close-distance face-to-face conference, and can not achieve accurate eye-to-eye communication.
In summary, video signals transmitted by the existing video conference system are often in-plane effects, so that eye-to-eye communication between conference participants cannot be realized, and higher-quality interactive experience cannot be delivered to both parties of the conference participants.
Disclosure of Invention
The invention provides a video conference terminal and a video conference system, and aims to solve the problem that the existing video conference system cannot carry out eye-to-eye communication.
To solve the above technical problem, the present invention is achieved as described above, and provides a video conference terminal, including a projector, a holographic projection screen, and a camera:
the holographic projection screen is arranged between a user and the camera, and the projector is arranged on any side of the holographic projection screen; the holographic projection screen is a transparent holographic projection screen; the camera is arranged on the same horizontal line with the eyes of the user so as to shoot the eye spirit of the user;
the projector is used for receiving a video signal sent by the other party in the conference, converting the video signal into a projection beam and projecting the projection beam onto the holographic projection screen, wherein the projection beam is imaged and displayed on the holographic projection screen;
the camera is used for shooting the video signal of the user through the holographic projection screen and sending the video signal to the video conference terminal of the other party.
Further, the terminal further comprises a first polarizer and a second polarizer: the first polaroid is arranged at the front end of the lens of the projector, the second polaroid is arranged at the front end of the lens of the camera, and the first polaroid and the second polaroid are both linear polaroids or both circular polaroids;
if the first polarizer and the second polarizer are both linear polarizers, the polarization axis directions of the first polarizer and the second polarizer are mutually vertical; if the first polarizer and the second polarizer are both circular polarizers, the transmission circular polarization directions of the first polarizer and the second polarizer are opposite to each other.
Further, if the video conference terminal is used for a 2D video conference, the camera is a 2D camera, the projector is a 2D projector, and both the first polarizer and the second polarizer are static polarizers;
the first polarizer is used for filtering the projection light beams projected by the projector and enabling the projection light beams with the same polarization state as the first polarizer to pass through;
the second polarizer is used for filtering the projection light beams projected by the projector, enabling the projection light beams with the same polarization state as the first polarizer not to pass through, and enabling the light beams with the same polarization state as the second polarizer from the user to the camera to pass through.
Further, if the video conference terminal is used for a 3D video conference, the projector is a 3D projector, the camera is a 3D camera, the first polarizer and the second polarizer are both dynamic polarization adjusting devices, and the polarization states of the first polarizer and the second polarizer are asynchronous;
the first polarizer is synchronous with the projector when projecting left and right images and is used for sequentially adjusting the projection light beams projected onto the holographic projection screen into the polarization states of the left and right images;
the second polarizer is asynchronous with the left and right images projected by the projector, and is used for shielding the left and right images projected onto the holographic projection screen and enabling light beams from the user to the camera to pass through.
Furthermore, the system also comprises a time division polarization synchronous illuminating lamp which is synchronous with the polarization state of the second polarizer and is arranged above the holographic projection screen.
Further, the terminal further comprises a face recognition device, and the face recognition device is used for locking the face display position when the shooting object is in motion, so that the position of the displayed face in the shooting process is consistent with the position of the camera.
Further, the holographic projection screen is a holographic projection nano display screen with the transparency of more than 50%.
Further, the size of the holographic projection screen is larger than 1m by 1m, so that the projection displays the real form ratio of the user.
Further, a distance between the user and the holographic projection screen is 0.5m to 3 m.
In order to solve the technical problem, the invention further provides a video conference system, which comprises the video conference terminal.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a video conference terminal which comprises a projector, a transparent holographic projection screen and a camera. The projector receives a video signal from the other side, converts the video signal into a projection beam and projects the projection beam onto the holographic projection screen; in addition, the camera provided by the invention is arranged on the same horizontal line with the eyes of the user and can shoot the catch of the user, so that both sides of the video conference can watch the mutual catch state on the holographic projection screen, and the near-real catch communication is realized. Therefore, the invention solves the problem that the existing video conference system can not carry out eye-to-eye communication.
Drawings
Fig. 1 is a schematic diagram of a video conference terminal according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of a video conference terminal according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of 3D synchronous and asynchronous signals provided by a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As a first embodiment of the present invention, as shown in fig. 1, a video conference terminal provided by the present invention includes a projector 101, a holographic projection screen 102, and a camera 103. The video conference terminal provided by the embodiment is mainly applied to a 2D video conference system, and therefore, the projector 101 is a 2D projector, and the camera 103 is a 2D camera.
The mutual positions of the projector 101, the holographic projection screen 102 and the camera 103 are shown in fig. 1, that is, the holographic projection screen 102 is disposed between the user a and the camera 103, the projector 101 is disposed on any side of the holographic projection screen 102, and may be located on the same side as the user a or on the other side opposite to the user (i.e., the side where the camera 103 is located), the disposition position of the projector 101 is set mainly according to the characteristics of the holographic projection screen 102, in the present embodiment, the projector 101 and the user a are located on the same side of the holographic projection screen 102, and the camera 103 is disposed on the same horizontal line L with the eyes of the user a.
The holographic projection screen 102 is a transparent holographic projection screen, in the embodiment, a holographic projection nano display screen with the transparency of more than 50% (preferably, a holographic projection nano display screen with the transparency of more than 80%), for example, a NanoAR screen, is adopted, because the terminal adopts the transparent holographic projection screen 102, the camera 103 can be arranged at the other side of the holographic projection screen 102 and cannot be blocked by the transparent holographic projection screen 102 in the shooting process, and because the camera 103 can be arranged on the same horizontal line L with the eyes of the user A, the eye spirit of the user A can be accurately shot, no deflection is generated, so that two parties of a video conference can watch the eye spirit state of each other on the holographic projection screen, and near-real eye spirit communication is realized.
The projector 101 receives a video signal transmitted by another party in the conference, converts the video signal into a projection beam, and projects the projection beam onto the holographic projection screen 102 (the projection beam is shown as L1 in fig. 1), and the projection beam is displayed as an image on the holographic projection screen 102, as shown as L2 in fig. 1, and is a viewing beam of the user a.
During the process of watching the video image of the other party, the camera 103 shoots the video signal of the user a (as shown by L3 in fig. 1, shooting light) through the holographic projection screen 102 and sends the video signal to the video conference terminal of the other party (i.e. the other party of the conference).
Both parties or multiple parties participating in the conference use the video conference terminal, so that almost real eye-to-eye communication can be realized in the conference.
In general, when the camera 103 records the image of the user a, the image of the other party is projected on the hologram projection screen 102 through the hologram projection screen 102, and at this time, the projected image interferes with the currently captured image.
In order to avoid the above interference, the video conference terminal provided in this embodiment further includes: a first polarizing plate 104 and a second polarizing plate 105. The first polarizer 104 and the second polarizer 105 are either linear polarizers or circular polarizers. If the first polarizer 104 and the second polarizer 105 are both linear polarizers, the polarization axes of the first polarizer 104 and the second polarizer 105 are perpendicular to each other (i.e., the polarization directions are perpendicular to each other); if the first polarizer 104 and the second polarizer 105 are circular polarizers, the transmission circular polarization directions of the first polarizer 104 and the second polarizer 105 are opposite to each other (i.e., one polarizer is clockwise circular polarization and the other polarizer is counterclockwise circular polarization).
In the present embodiment, the first polarizer 104 and the second polarizer 105 are linear polarizers, and in the present embodiment, the first polarizer 104 is a horizontal polarizer (i.e., the optical axis is horizontal), and the second polarizer 105 is a vertical polarizer (i.e., the optical axis is vertical). It may be arranged that 104 is a vertical polarizer and 105 is a horizontal polarizer. Meanwhile, since the video conference terminal provided in this embodiment is mainly applied to a 2D video conference, the first polarizer 104 and the second polarizer 105 are both static linear polarizers.
The first polarizer 104 is disposed at the front end of the lens of the projector 101, and is configured to filter projection beams that are different from the polarization state of the first polarizer 104 (it should be noted that most of the different projection beams are projection beams with the same polarization state as the second polarizer 105) from the projection beams projected by the projector 101, pass only the projection beams with the same polarization state as the first polarizer 104, and project the passed light and shadow beams onto the holographic projection screen 102. The second polarizer 105 is disposed at the front end of the lens of the camera 103 and is used for filtering the projection beam projected by the projector 101 onto the holographic projection screen 102, which has the same polarization state as the first polarizer 104, so that the projection beam cannot pass through. Meanwhile, the second polarizing plate 105 allows a light beam having the same polarization state as the second polarizing plate 105 from the user a to the camera 103 to pass therethrough, so that the camera 103 can photograph a video signal of the user a. The light beam projected by the projector 101 is filtered by the sequential filtering action of the two polarizers 104 and 105, so as to eliminate the interference generated when the camera 103 shoots the user. The camera 103 can avoid the interference of the image display on the holographic projection screen 102 during the shooting process, and clearly shoot the video signal of the user a through the holographic projection screen 102. It should be noted that, the light beam with the polarization state two (the same as the polarization state 105) in the projection light beam is filtered by the filter 104, so that only the light beam with the polarization state one (the same as the polarization state 104) is projected onto the holographic projection screen, and then the light beam with the polarization state one is filtered by the filter 105, after twice filtering, the remaining projection light beam part generated by the projector 101 can be ignored, and finally, the camera 103 can be ensured not to be interfered by the projection image of the other party as much as possible in the recording process, and only the image recorded by the own party (user a) is captured.
The size of the holographic projection screen 102 may be any size, preferably larger than 1m × 1m, in order to display the image of the half body or even the whole body of a person according to the size of 1:1 of a real person, in the prior art, in a video process using a mobile phone, the screen is very small, the imaging ratio of the other party is compressed to a range smaller than the screen, and thus the video is not vivid and clear. As another example, a screen of a television. There is almost no screen that can be displayed in whole body, therefore, the size of the holographic projection screen 102 is set to be larger than 1m × 1m, so that the projection displays the real form proportion of the user, and both parties of the conference participant can have higher-quality interactive experience.
The distance between the user a and the holographic projection screen 102 is of any size, preferably 0.5m to 3m, more preferably 1 m. In the prior art, a person is often far away from a screen, so that an original screen is not transparent, and an original camera cannot be directly connected to the middle of the screen, and therefore cannot be directly positioned on the same horizontal plane with eyes of the person, but is often arranged at the top end or the bottom end of the screen, so that when a person takes a picture of the face, the person is not in a direct-view state, but has a certain angle, so that if the person is very close to the screen, the person can intuitively see that the direct-view direction of the eyes of the person deviates from the screen, and when the distance is far, the phenomenon is not obvious and visual due to the fact that the distance is far away. Therefore, in the prior art, most people gather far from a television screen, the video conference is suitable for group video conferences, namely, when both sides have a plurality of users, the video conference is more suitable for 1-to-1 and person-to-person video conferences. For example, the screen is arranged at the front end of the desk to shoot the half-length image of the human body, and people can carry out video conference only by sitting at the conventional position of the office desk, so that the video conference is more in accordance with the comfort level of the sense of the human body.
In summary, the first embodiment of the present invention provides a video conference terminal, so that both parties of a video conference can view the eye states of each other on a holographic projection screen, thereby achieving near-real eye communication.
As a second embodiment of the present invention, as shown in fig. 2, a video conference terminal provided by the present invention includes a projector 201, a holographic projection screen 202, and a camera 203. The video conference terminal provided by the embodiment is mainly applied to a 3D video conference system, and therefore the projector 201 is a 3D projector, and the camera 203 is a 3D camera.
The mutual positions of the projector 201, the holographic projection screen 202 and the camera 203 are shown in fig. 2, that is, the holographic projection screen 202 is disposed between the user a and the camera 203, the projector 201 is disposed on any side of the holographic projection screen 202, and may be located on the same side as the user a, or may be disposed on the other side opposite to the user (i.e., the side where the camera 203 is located), the disposition position of the projector 201 is set mainly according to the characteristics of the holographic projection screen 202, in the present embodiment, the projector 201 and the user a are located on the same side of the holographic projection screen 202, and the camera 203 is disposed on the same horizontal line L with the eyes of the user a.
The holographic projection screen 202 is a transparent holographic projection screen, in the embodiment, a holographic projection nano display screen with the transparency of more than 50 percent is adopted, for example, a screen with the model of NanoAR, because the transparent holographic projection screen 202 is adopted in the terminal, the camera 203 can be arranged at the other side of the holographic projection screen 202 and cannot be blocked by the transparent holographic projection screen 202 in the shooting process, and because the camera 203 can be arranged on the same horizontal line L with the eyes of the user A, the eye spirit of the user A can be accurately shot without deflection, so that two video conference parties can watch the eye spirit state of each other on the holographic projection screen, and near-real eye spirit communication is realized.
The projector 201 receives a video signal transmitted by the other party to the conference and converts the video signal into a projection beam to project onto the holographic projection screen 202 (the projection beam is shown as L1 in fig. 2), and the projection beam is displayed as an image on the holographic projection screen 202. as shown in L2 in fig. 2, for the viewing beam of the user a, as shown in B, for the 3D imaging virtual position of the user B of the other party to the conference, a 3D virtual image is displayed directly behind the holographic projection screen 202. if the holographic projection screen 202 is set at a relatively far distance, a 3D virtual image can also be displayed in front of the holographic projection screen 202.
During the process of watching the video image of the other party, the camera 203 shoots the video signal of the user a (as shown by L3 in fig. 2, shooting light) through the holographic projection screen 202 and sends the video signal to the video conference terminal of the other party (i.e. the other party of the conference).
Both parties or multiple parties participating in the conference use the video conference terminal, so that almost real eye-to-eye communication can be realized in the conference.
In general, when the camera 203 records the image of the user a, the image of the other party is projected on the holographic projection screen 202 through the holographic projection screen 202, and at this time, the projected image interferes with the currently captured image.
In order to avoid the above interference, the video conference terminal provided in this embodiment further includes: a first polarizer 204 and a second polarizer 205. The first polarizer 204 and the second polarizer 205 may be both linear polarizers or both circular polarizers. If the first polarizer 204 and the second polarizer 205 are both linear polarizers, the polarization directions of the first polarizer 204 and the second polarizer 205 are perpendicular to each other (i.e., the polarization directions are perpendicular to each other); if the first polarizer 204 and the second polarizer 205 are circular polarizers, the transmission circular polarization directions of the first polarizer 204 and the second polarizer 205 are opposite to each other (i.e., one polarizer is clockwise circular polarization and the other polarizer is counterclockwise circular polarization).
Since the video conference terminal provided in this embodiment is mainly applied to a 3D video conference, the first polarizer 204 and the second polarizer 205 are both dynamic polarizers (i.e., dynamic circular polarizers or dynamic linear polarizers). It should be noted that, when a 3D video conference is in progress, 204 and 205 may be dynamic polarizers, or other polarization adjusting devices with dynamic polarization characteristics, and it is within the scope of the present invention to use any polarization adjusting device with dynamic polarization characteristics. In the present embodiment, the first polarizer 204 and the second polarizer 205 are dynamic circular polarizers. And the polarization states of both the first polarizer 204 and the second polarizer 205 are asynchronous. In the present embodiment, the first polarizer 204 is a time division circular polarizer, the second polarizer 205 is a time division circular polarizer, and the driving signals of the two polarizers are asynchronous, as shown in fig. 3. The first polarizer 204 is disposed at the front end of the lens of the projector 201, and the second polarizer 205 is disposed at the front end of the lens of the camera 203. A first polarizer 204 synchronized with the left and right images projected by the projector 201 for sequentially adjusting the projection beam projected onto the hologram projection screen 202 to the polarization states of the left and right images; the second polarizer 205, asynchronous to the left and right images projected by the projector 201, is used to block the left and right images projected onto the holographic projection screen 202, and at the same time, it can allow light from the user a to be incident on the camera 203, so that the camera 203 can avoid the interference of the image display on the holographic projection screen, and clearly shoot the video signal of the user a through the holographic projection screen. The specific principles of 204 and 205 can be understood as follows:
it should be noted that the projection principle of the 3D projector is a frame left and a frame right sequential projection. The first polarizer 204 and the second polarizer are time division polarizers, and have the characteristic of sequentially polarizing a frame left and a frame right. When the projector 201 projects a left frame, the first polarizer 204 is used to change the polarization state of the left frame to a left polarization state (i.e., the left frame can be received by the left eye when the user wears 3D glasses), and since the polarization states of the first polarizer 204 and the second polarizer 205 are asynchronous, the polarization state of the second polarizer 205 is changed to a right polarization state (i.e., the right eye can be received), so that the camera located behind the polarizer 205 can only receive the projection of the right eye polarization state at this time, i.e., the projection has been changed to the left polarization state by the polarizer 204 at this time, the camera 203 cannot capture the left frame projection currently projected from the projector 201, and the left frame projection of the projector 201 can be filtered out by the structural design at this time. Similarly, when the projector 201 projects a right frame, the first polarizer 204 is used to change the polarization state of the right frame to a right polarization state (i.e. the right eye can receive the right frame), and since the polarization states of the first polarizer 204 and the second polarizer 205 are asynchronous, the second polarizer 205 changes the polarization state to a left polarization state (i.e. the left eye can receive the left frame), the camera behind the polarizer 205 can only receive the left-eye polarization state at this time, and since the projection is changed to the right-eye polarization state by the polarizer 204 at this time, the camera 203 cannot capture the right frame projection currently projected from the projector 201, so the structural design at this time can filter the right frame projection of the projector 201.
Through the sequential action of the two polarizers 204 and 205, the camera 203 can avoid the interference of imaging display on the holographic projection screen 202 in the shooting process, clearly shoot the video signal of the user A through the holographic projection screen 202, and finally ensure that the camera 203 can be furthest free from the interference of projection imaging of the other party in the recording process, and only capture the image recorded by the own party (the user A).
The size of the holographic projection screen 202 may be any size, preferably larger than 1m × 1m, in order to image a person with a size of 1:1 of a real person, in the prior art, when a mobile phone is used for video, the screen is very small, and the imaging ratio of the other party is compressed to a range smaller than the screen, so that the video is not vivid and clear. As another example, a screen of a television. There is almost no screen that can be displayed in whole body, therefore, the size of the holographic projection screen 202 is set to be larger than 1m × 1m, so that the projection displays the real form proportion of the user, and thus, both parties of the conference participant can have a higher-quality interactive experience.
The distance between the user a and the holographic projection screen 202 is of any size, preferably 0.5m to 3m, more preferably 1 m. In the prior art, a person is often far away from a screen, so that an original screen is not transparent, and an original camera cannot be directly connected to the middle of the screen, and therefore cannot be directly positioned on the same horizontal plane with eyes of the person, but is often arranged at the top end or the bottom end of the screen, so that when a person takes a picture of the face, the person is not in a direct-view state, but has a certain angle, so that if the person is very close to the screen, the person can intuitively see that the direct-view direction of the eyes of the person deviates from the screen, and when the distance is far, the phenomenon is not obvious and visual due to the fact that the distance is far away. Therefore, in the prior art, most people gather far from a television screen, the video conference is suitable for group video conferences, namely, when both sides have a plurality of users, the video conference is more suitable for 1-to-1 and person-to-person video conferences. For example, the screen is arranged at the front end of the desk to shoot the half-length image of the human body, and people can carry out video conference only by doing at the conventional position of the office desk, so that the video conference is more in accordance with the comfort level of the sense of the human body.
In addition, the video conference system provided by the present embodiment further includes a time-division polarization synchronous illumination lamp 206 and 3D glasses 207. The time-division polarization synchronous illuminating lamp 206 is synchronized with the polarization state of the second polarizer 205 (i.e. the polarization characteristic of 206 when the lamp is turned on is synchronized with the polarization characteristic of 205), and the time-division polarization synchronous illuminating lamp 206 is disposed above the holographic projection screen 102. As shown in fig. 3, which shows polarization characteristics of 3D synchronous and asynchronous signals, the polarization synchronous illumination lamp 206 is used to reduce blackness of 3D glasses 208 (i.e., 3D polarized glasses in fig. 3), thereby increasing comfort during the video conference experience. Because the general 3D glasses lenses are all black, when the time-division polarization synchronous illuminating lamp 206 illuminates, the illumination light thereof can penetrate through the 3D glasses 208 to increase the brightness of the face portion of the user, so that the black degree of the 3D glasses provided by the invention can be lower than that of the 3D glasses commonly used in the market, and is closer to the transparent color of the lenses.
In this embodiment, the video conference terminal further includes a face recognition device 208 (not shown in fig. 2), and the face recognition device 208 is configured to lock a face display position when the shooting object is in motion, so that a position where a face is displayed during shooting is consistent with a position of the camera 203 behind the holographic projection screen, thereby tracking a movement dynamic of an eye catch of the face. The face recognition device 208 may be a hardware device, or may also be a software module, and may be installed at any location of the video conference terminal, such as on the projector 201 or the camera 203. In the video conference process, even if the camera is arranged to be on the same horizontal plane with eyes of people, in the conference process, the heads of the people of two parties of the conference can be moved in a small range, such as turning left or turning right, at this time, the human face target can be locked in a proper range by adopting the human face recognition tracking module even if the human face is movably filled, so that the human face part can be captured at all times, and then the human face target is transmitted to the projector of the other party. The face recognition tracking technology is a relatively mature technology, and can be designed to be used on any element, for example, a camera is fixed, and then the module is integrated on a projector, so that the projector achieves the recognition tracking effect through the face recognition module during projection. If the module is integrated on the camera, the camera can be mechanically movable, and the camera can track and shoot the human face according to the module. Or the face recognition module is arranged at the cloud end, algorithm correction and the like are carried out through the face recognition module in the process of transmitting video imaging from one party of the conference to the other party of the conference, and therefore the purpose of always imaging clear faces and eyes is achieved.
In summary, the second embodiment of the present invention provides a video conference terminal, so that both parties of a video conference can view the eye states of each other on a holographic projection screen, thereby achieving near-real eye communication. And because the 3D technology is adopted, in the video conference process, the user A sees that the imaging of the opposite side (the user B) is three-dimensional instead of planar, and can experience real close-range feeling, so that two parties participating in the video conference can experience the distance of the opposite side in the range of about 1 to 2 meters in front of the user, the size ratio of 1 to 1 of a real person can be achieved, the reality of face-to-face conversation of the two persons is greatly achieved, and the experience effect of the user is optimized. And this embodiment still contains face identification function so that can lock the position on the projection screen of other side's face, guarantee with the position of the camera behind the projection screen unanimity, cause eye-catching communication can not receive by the shooting object to move about the influence.
The third implementation of the present invention provides a 2D-based video conference system, which applies the video conference terminal described in the first embodiment, is mainly applied to a 2D video conference, and can realize eye contact communication of conference participants.
The fourth embodiment of the present invention provides a 3D-based video conference system, which is mainly applied to a 3D video conference by using the video conference terminal according to the second embodiment, and can realize eye contact among conference participants.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A video conference terminal, characterized in that the terminal comprises a projector, a holographic projection screen and a camera:
the holographic projection screen is arranged between a user and the camera, and the projector is arranged on any side of the holographic projection screen; the holographic projection screen is a transparent holographic projection screen; the camera is arranged on the same horizontal line with the eyes of the user so as to shoot the eye spirit of the user;
the projector is used for receiving a video signal sent by the other party in the conference, converting the video signal into a projection beam and projecting the projection beam onto the holographic projection screen, wherein the projection beam is imaged and displayed on the holographic projection screen;
the camera is used for shooting the video signal of the user through the holographic projection screen and sending the video signal to the video conference terminal of the opposite side;
wherein, the terminal still includes first polaroid and second polaroid:
the first polaroid is arranged at the front end of the lens of the projector, the second polaroid is arranged at the front end of the lens of the camera, and the first polaroid and the second polaroid are both linear polaroids or both circular polaroids;
if the first polarizer and the second polarizer are both linear polarizers, the polarization axis directions of the first polarizer and the second polarizer are mutually vertical;
if the first polarizer and the second polarizer are both circular polarizers, the light-transmitting circular polarization directions of the first polarizer and the second polarizer are opposite to each other;
if the video conference terminal is used for a 3D video conference, the projector is a 3D projector, the camera is a 3D camera, the first polaroid and the second polaroid are both dynamic polarization adjusting devices, and the polarization states of the first polaroid and the second polaroid are asynchronous;
the first polarizer is synchronous with the projector when projecting left and right images and is used for sequentially adjusting the projection light beams projected onto the holographic projection screen into the polarization states of the left and right images;
the second polarizer is asynchronous with the left and right images projected by the projector, and is used for shielding the left and right images projected onto the holographic projection screen and enabling light beams from the user to the camera to pass through.
2. The terminal of claim 1, wherein if the video conference terminal is used for a 2D video conference, the camera is a 2D camera, the projector is a 2D projector, and the first and second polarizers are both static polarizers;
the first polarizer is used for filtering the projection light beams projected by the projector and enabling the projection light beams with the same polarization state as the first polarizer to pass through;
the second polarizer is used for filtering the projection light beams projected by the projector, enabling the projection light beams with the same polarization state as the first polarizer not to pass through, and enabling the light beams with the same polarization state as the second polarizer from the user to the camera to pass through.
3. The terminal of claim 1, further comprising a time-division polarization synchronous illumination lamp synchronized with a polarization state of the second polarizer, and disposed above the holographic projection screen.
4. The terminal according to claim 1, wherein the terminal further comprises a face recognition means for locking a face display position when the photographic subject is in motion, so that the position where the face is displayed during the photographing process is consistent with the position of the camera.
5. The terminal of claim 1, wherein the holographic projection screen is a holographic projection nano-display having a transparency of greater than 50%.
6. The terminal of claim 1, wherein the holographic projection screen has a size of more than 1m x 1m, so that the projection shows a real form ratio of the user.
7. The terminal of claim 1, wherein a distance between the user and the holographic projection screen is 0.5m to 3 m.
8. A video conferencing system, characterized in that the system comprises a video conferencing terminal according to any of claims 1 to 7.
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| CN111641813B (en) * | 2020-05-29 | 2022-03-25 | 广东睿住智能科技有限公司 | Visitor guiding method, building visible intercom system and storage medium |
| CN112492253A (en) * | 2020-09-20 | 2021-03-12 | 周永业 | Video conference system with face position tracking function and implementation method thereof |
| CN114697602B (en) * | 2020-12-31 | 2023-12-29 | 华为技术有限公司 | Conference device and conference system |
| CN113784077B (en) * | 2021-09-24 | 2023-03-21 | 联想(北京)有限公司 | Information processing method and device and electronic equipment |
| CN113885703A (en) * | 2021-09-30 | 2022-01-04 | 联想(北京)有限公司 | Information processing method and device and electronic equipment |
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