CN115712351A - Hierarchical rendering and interaction method and system for multi-person remote mixed reality sharing scene - Google Patents
Hierarchical rendering and interaction method and system for multi-person remote mixed reality sharing scene Download PDFInfo
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Abstract
The invention discloses a multi-user remote mixed reality sharing scene oriented hierarchical rendering and interaction method, which clusters visual angles of all participants in cloud service to synthesize a plurality of main rendering visual angles, rapidly processes and synthesizes images for specific visual angles in side service through a background image, a foreground image and an interactive object mask image, outputs the images to side equipment for displaying and interacting, and realizes rapid response of side angle change of an opposite end through interpolation of multi-visual-angle images in the side service. According to the invention, the real-time interaction capability of the end side is improved through a cloud edge-end graded rendering mode, the cloud service rendering pressure is reduced, and the capability of multi-user remote mixed reality interaction is effectively supported.
Description
Technical Field
The invention belongs to the technical field of computer application, and particularly relates to a hierarchical rendering and interaction method and system for a multi-user remote mixed reality sharing scene.
Background
Mixed reality technology is an important direction for computer application, and has a great deal of applications in many fields such as education, medical treatment, office, military affairs, travel and the like. Multi-person remote interaction is an important development direction of mixed reality, but the existing technical scheme is difficult to support the multi-person remote interaction. The adoption of the local rendering mode has higher requirements on the display interaction equipment and the computing resources at the opposite end side, higher hardware cost and is not beneficial to popularization. The requirement on network bandwidth is high by adopting a cloud rendering mode, and when the number of the shared scene interaction people is large, the cloud multi-view rendering pressure is very high, and the real-time performance is difficult to guarantee. Therefore, new technical architectures are needed to improve the overall system capacity.
Disclosure of Invention
The invention aims to provide a hierarchical rendering and interaction method and system for a multi-person remote mixed reality sharing scene aiming at the defects of the prior art. According to the invention, through the hierarchical rendering and interaction mode of the cloud edge, the number of users and the real-time level under the same computational resource are improved, and the problems of multi-user remote presentation and interaction under a mixed reality sharing scene are solved.
The purpose of the invention is realized by the following technical scheme: a multi-person remote mixed reality sharing scene oriented hierarchical rendering and interaction method comprises the following steps:
step 1: the method includes the steps that observation visual angle information of all participants in a multi-person remote mixed reality sharing scene is collected in a cloud service. The observation visual angle information comprises a viewpoint position, a sight line direction and a visual angle range of each participant under a shared scene coordinate system;
step 2: based on the viewpoint positions of participants and the approximation degree of the view angle direction, clustering all the participants to obtain n participant sets Ei, i =1,2, …, n;
and 3, step 3: calculating to obtain a main viewpoint position Pi, a main sight direction Di and a main visual angle range Vi of each participant set Ei, and generating a main rendering visual angle Ri based on Pi, di and Vi so that Ri can cover the observation visual angles of all participants in Ei;
and 4, step 4: in the cloud service, allocating a cloud rendering resource for each participant set Ei for rendering and interactive calculation of a main rendering view Ri; and simultaneously rendering a background image Bi, a foreground image Fi and an interactive object mask image Mi for each main rendering view Ri.
And 5: and the cloud service sends the main rendering view Ri, the background image Bi, the foreground image Fi and the interactive object mask image Mi to the side service. The side service calculates the relative position and posture relation between the actual observation visual angle Rij and the main rendering visual angle Ri of any participant j in the Ei, and performs perspective transformation and cutting on Bi, fi and Mi to obtain a background image Bij, a foreground image Fij and an interactive object mask Mij which are unique to the participant j; the side service fuses the background image Bij and the foreground image Fij to obtain a display image Wij approximate to the actual observation angle of the participant j, and sends the Wij to the side equipment of the participant j.
Step 6: and the end-side equipment of the participant j receives the display image Wij and then displays the display image Wij in real time, records the interactive operation of the participant in a Wij image coordinate system, feeds back the interactive information to the side service, and simultaneously sends the real-time observation visual angle information of the participant to the side service.
And 7: after receiving the interaction position based on the display image Wij, the side service performs comparative analysis with the corresponding interactive object mask Mij to judge whether the side service belongs to an interactive area; if the side service belongs to the side service, the side service sends the interaction information to the cloud service, and the cloud service uniformly processes and executes response; if not, no operation is performed. Meanwhile, the side service uploads the received observation visual angle information to the cloud service in real time, and before the cloud service issues new Bi, fi and Mi, a plurality of images with the closest visual angles are selected from a plurality of foreground images with different pre-prepared visual angles according to the change of the observation visual angles to perform interpolation processing, so that a new foreground image with approximate effect is generated quickly, perspective transformation and cutting are performed on the background image synchronously, and finally, a foreground and a background are fused into a temporary frame supplementing image to be issued to the side equipment in real time.
And 8: and the cloud service judges and analyzes the interaction logic according to the interaction information collected by each side, executes corresponding interaction operation and updates the state of the shared scene.
And step 9: and circularly repeating the steps 1-8 until the task is terminated or ended.
Further, the participants in the step 1 include real human beings capable of autonomous interaction, and also include virtual digital people driven by data or programs.
Further, in the step 2, every two participants in each participant set Ei satisfy:
a) The three-dimensional geometric distance of the viewpoint position is smaller than a distance threshold value d;
b) The angular deviation of the viewing direction is less than an angular threshold theta.
Further, the interactive object mask Mi in step 4 refers to a projection view of the interactive object on the rendering plane in the view angle, where the value of the interactive position is 1 and the value of the non-interactive position is 0. The types of interactable objects include two-dimensional and three-dimensional virtual objects and user interfaces.
Further, the side service in the step 5 and the step 7 fuses the background image and the foreground image, and the specific fusion method is determined according to the side device, if the side device executes the virtual reality application, the foreground image is superimposed on the background image, and the fused image is output; if the end-side equipment executes the augmented reality application, the shielding condition of the real object to the foreground and the background is calculated according to the application requirement and the real environment state, the real image, the foreground image with the transparent channel and the background image after part of the foreground image is shielded by the real object are fused, and the fused image is output.
Further, the foreground images of multiple different viewing angles prepared in advance in step 7 refer to that after the shared scene is established and before the real-time interaction starts, stereoscopic surround shooting is performed on the foreground object at the same distance and interval in the cloud service, and the obtained foreground object picture of each viewing angle is the foreground images of multiple different viewing angles prepared in advance and is sent to each side service.
The invention also comprises a hierarchical rendering and interaction system for the multi-person remote mixed reality sharing scene, which comprises:
the participant observation visual angle information collection module is used for collecting the observation visual angle information of all participants in a multi-person remote mixed reality sharing scene in the cloud service;
a participant clustering module used for clustering all participants based on the approximation degree of the viewpoint positions and the view angle directions of the participants to obtain n participant sets Ei, i =1,2, …, n,
the main rendering visual angle generating module is used for calculating a main viewpoint position Pi, a main sight direction Di and a main visual angle range Vi of each participant set Ei, and generating a main rendering visual angle Ri based on Pi, di and Vi so that Ri can cover observation visual angles of all participants in Ei;
the cloud rendering resource allocation module is used for allocating a cloud rendering resource for each participant set Ei in the cloud service, and the cloud rendering resource is used for rendering and interactive calculation of a main rendering view Ri; simultaneously rendering a background image Bi, a foreground image Fi and an interactive object mask image Mi aiming at each main rendering visual angle Ri;
the side service module is used for the cloud service to send the main rendering view Ri, the background image Bi, the foreground image Fi and the interactive object mask image Mi to the side service; the side service calculates the relative position and posture relation between the actual observation visual angle Rij and the main rendering visual angle Ri of any participant j in the Ei, and performs perspective transformation and cutting on Bi, fi and Mi to obtain a background image Bij, a foreground image Fij and an interactive object mask Mij which are unique to the participant j; the side service fuses the background image Bij and the foreground image Fij to obtain a display image Wij approximate to the actual observation visual angle of the participant j, and sends the Wij to the side equipment of the participant j;
the end-side equipment module is used for displaying the participant j in real time after the end-side equipment of the participant j receives the display image Wij, recording the interactive operation of the participant in a Wij image coordinate system, feeding back the interactive information to the side service, and simultaneously sending the real-time observation visual angle information of the participant to the side service;
the temporary frame supplementing image fusion module is used for comparing and analyzing the side service with the corresponding interactive object mask Mij after the side service receives the interactive position based on the display image Wij, and judging whether the side service belongs to an interactive area or not; if the side service belongs to the side service, the side service sends the interaction information to the cloud service, and the cloud service uniformly processes and executes response; if not, no operation is carried out; meanwhile, the side service uploads the received observation visual angle information to the cloud service in real time, and selects a plurality of images with the closest visual angles from a plurality of foreground images with different visual angles prepared in advance to perform interpolation processing according to the change of the observation visual angles before the cloud service issues new Bi, fi and Mi, so as to quickly generate a new foreground image with approximate effect, perform perspective transformation and cutting on a background image synchronously, and finally fuse a foreground and a background into a temporary frame supplementing image to be issued to the side equipment in real time;
the cloud service interaction operation module is used for judging and analyzing interaction logic, executing corresponding interaction operation and updating the state of a shared scene by the cloud service according to the interaction information collected by each side;
and the cyclic operation module is used for cyclically and repeatedly executing the operations of the modules until the task is stopped or ended.
The invention also comprises a hierarchical rendering and interaction device for the multi-person remote mixed reality sharing scene, which comprises a memory and one or more processors, wherein the memory stores executable codes, and when the one or more processors execute the executable codes, the hierarchical rendering and interaction device is used for realizing the hierarchical rendering and interaction method for the multi-person remote mixed reality sharing scene
The invention also includes a computer readable storage medium, characterized in that a program is stored thereon, which when executed by a processor, implements a hierarchical rendering and interaction method for a multi-person remote mixed reality sharing scene of the invention.
The invention has the beneficial effects that: according to the method, the repeated rendering of similar visual angles in the cloud service is greatly reduced by clustering the visual angles of the participants, and the number of online users in a shared scene can be effectively increased under the same cloud computing resource; through the rapid processing and fusion of the side service to the background image and the foreground image, the observation picture can be adjusted in an intermittent self-adaptive manner when waiting for the cloud rendering data to be issued, the real-time impression of the lower end side of the cloud rendering framework is improved, and different types of mixed reality applications such as virtual reality and augmented reality can be supported; by separation and processing of the interactive mask, invalid interactive information is filtered out by the side service, and the interactive efficiency of cloud service processing is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a hierarchical rendering and interaction method for a multi-person remote mixed reality sharing scene;
FIG. 2 is an exemplary diagram of a primary rendering perspective composite effect;
3 a-3 d are exemplary diagrams of the effect of simultaneously rendering a background image, a foreground image and an interactive object mask image at a main rendering view angle, where fig. 3a is an original view of the main rendering view angle, fig. 3b is the background image, fig. 3c is the foreground image, and fig. 3d is the interactive object mask image;
4 a-4 b are exemplary diagrams of perspective transformation and clipping of a background image, FIG. 4a is the background image of an original main rendering view angle and a user observation area, and FIG. 4b is the background image and the clipping area after perspective transformation;
FIG. 5 is an exemplary diagram of a pre-stereo surround generation pre-scene image;
fig. 6 is a system configuration diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a hierarchical rendering and interaction method for a multi-person remote mixed reality sharing scene, including the following steps:
step 1: the method includes the steps that observation visual angle information of all participants in a multi-person remote mixed reality sharing scene is collected in a cloud service. The observation visual angle information comprises a viewpoint position, a sight line direction and a visual angle range of each participant under a shared scene coordinate system;
specifically, a shared virtual scene is loaded in the cloud service, observation visual angle information of all participants remotely accessed is obtained, and the observation visual angle information comprises viewpoint position coordinates (x, y, z), a sight line direction (alpha, beta, gamma) and a visual angle range (fov _ width, fov _ height),
step 2: based on the viewpoint positions of the participants and the approximation degree of the view angle direction, clustering is carried out on all the participants to obtain n participant sets Ei, i =1,2, …, n, and all the participants in each set Ei meet the following conditions:
a) The three-dimensional geometric distance of the viewpoint position is smaller than a distance threshold value d;
b) The angular deviation of the sight line direction is less than an angular threshold theta;
specifically, the distance threshold of the viewpoint position is set to be 0.5 m, the angle threshold of the sight line direction is set to be 20 degrees, the participants are clustered by adopting an agglomeration type hierarchical clustering method, the number of clusters is not preset, and finally n clusters, namely n participant sets, are obtained. The design has the advantages that the visual angles of participants in each set are relatively similar, and the simulation substitution can be realized through a uniform visual angle, so that the repeated rendering of similar pictures is avoided, the occupation of rendering resources of cloud services is greatly reduced, and the number of supportable online participants is increased.
And step 3: calculating to obtain a main viewpoint position Pi, a main sight direction Di and a main visual angle range Vi of each participant set Ei, and generating a main rendering visual angle Ri based on Pi, di and Vi so that Ri can cover the observation visual angles of all participants in Ei;
specifically, taking the example of fig. 2 as a reference, the actual imaging area of each participant perspective in the estimation set is simulated by the imaging reference plane placed at a certain distance behind the foreground object, and a bounding box that can cover all the imaging areas is calculated. And (3) with the view coverage bounding box as a first constraint condition and the viewpoint position within the cluster range of the set as a second constraint condition, estimating the viewpoint position, the sight direction and the view range of the main rendering view by an optimization method to form specific parameters of the main rendering view.
And 4, step 4: in the cloud service, allocating a cloud rendering resource for each participant set Ei for rendering and interactive calculation of a main rendering view Ri; and simultaneously rendering a background image Bi, a foreground image Fi and an interactive object mask image Mi for each main rendering view Ri.
Specifically, in the cloud service, a containerized rendering resource is applied for each main rendering visual angle, and a background image, a foreground image and an interactive object mask image are simultaneously drawn through parallel computation, as shown with reference to fig. 3. The interactive object mask image is a projection image of an interactive object on a rendering plane in the visual angle, the value of the interactive position is 1, and the value of the non-interactive position is 0. As can be seen in fig. 3, the interactable objects include three-dimensional foreground objects and interactable areas of a two-dimensional UI interface, but do not include all foreground objects, as not all foreground objects support interaction in this embodiment.
And 5: and the cloud service sends the main rendering view Ri, the background image Bi, the foreground image Fi and the interactive object mask image Mi to the side service. The side service calculates the relative position and posture relation between the actual observation visual angle Rij and the main rendering visual angle Ri of any participant j in the Ei, and performs perspective transformation and cutting on Bi, fi and Mi to obtain a background image Bij, a foreground image Fij and an interactive object mask Mij which are unique to the participant j; the side service fuses the background image Bij and the foreground image Fij to obtain a display image Wij approximate to the actual observation angle of the participant j, and sends the Wij to the side equipment of the participant j.
Specifically, the cloud service sends the main rendering perspective, the background map, the foreground map and the interactive object mask map to the side service. For each participant, the side service firstly acquires actual observation visual angle information of the participant, then calculates a three-dimensional transformation matrix between a main rendering visual angle and the actual observation visual angle, calls the three-dimensional transformation matrix by adopting a warp Peractive function of an OpenCV (open CV) library, performs perspective transformation on a background image, a foreground image and an interactive object mask image, and rapidly cuts to generate a new image approximate to the original observation visual angle, wherein the transformation effect of the background image is shown in a reference image 4; and the foreground image and the background image are overlapped to generate a display image which can be directly observed and interacted by a user, and the display image is sent to the virtual reality end-side equipment.
The design has the advantages that visual simulation similar to actual observation images of participants can be realized through rapid image processing, the method is a matched step of visual clustering and synthesizing a main rendering visual angle, independent rendering of each participant on a background is avoided, rendering pressure is greatly reduced, independence of the visual angles of the participants is kept, and serious distortion cannot be caused.
Step 6: and the end-side equipment of the participant j receives the display image Wij and then displays the display image Wij in real time, records the interactive operation of the participant in a Wij image coordinate system, feeds back the interactive information to the side service, and simultaneously sends the real-time observation visual angle information of the participant to the side service.
Specifically, the end-side device receives and presents the display image, collects the interaction intention and the observation visual angle transformation of the participant through the interaction device, and feeds back the interaction intention and the observation visual angle transformation to the side service. The interaction is directly executed in the display image, so that the interaction can be carried out in a display image coordinate system or is converted to the left side of the image through calculation, and the interaction coordinate position and the interaction instruction type are used for representing. The design has the advantages that the convenience of interaction is improved, the image space can be unified and normalized to be compared with the interactive object mask map generated in the step 5, so that whether the interaction is effective or not can be judged quickly, and the clearly interactive object can be distinguished quickly.
And 7: after receiving the interaction position based on the display image Wij, the side service performs comparative analysis with the corresponding interactive object mask Mij to judge whether the side service belongs to an interactive area; if the user terminal belongs to the cloud service, the side service sends the interaction information to the cloud service, and the cloud service uniformly processes and executes response; if not, no operation is performed. Meanwhile, the side service uploads the received observation visual angle information to the cloud service in real time, and before the cloud service issues new Bi, fi and Mi, a plurality of images with the closest visual angles are selected from a plurality of foreground images with different pre-prepared visual angles according to the change of the observation visual angles to perform interpolation processing, so that a new foreground image with approximate effect is generated quickly, perspective transformation and cutting are performed on the background image synchronously, and finally, a foreground and a background are fused into a temporary frame supplementing image to be issued to the side equipment in real time.
Specifically, after receiving the interaction position, the side service performs an and operation with the interactive object mask map, quickly judges a specific position where effective interaction is obtained, and sends the specific position to the cloud service. The design has the advantages that the interactive judgment of the cloud service can be reduced, the pressure of the cloud service is further reduced, and the overall efficiency is improved.
Meanwhile, the side service forwards the actual observation visual angle of the participant to the cloud service, estimates the relative visual angle coordinates of the current visual angle and the foreground object according to the visual angle change in the interval before the cloud service is updated and rendered, selects two images with the closest visual angles from the foreground images with a plurality of different visual angles prepared in advance, rapidly generates a new foreground image approximate to the actual observation visual angle change by adopting a motion compensation interpolation algorithm combined with self-adaptive scaling, synchronously performs perspective transformation and cutting similar to the step 5 on the background image, finally fuses the foreground and the background into a temporary frame supplementing image, and sends the temporary frame supplementing image to the side equipment in real time.
The design has the advantages that the transition images can be synthesized in an intermittent self-adaptive manner in cloud rendering, the display frame rate and the response speed of the end side are improved, the pause phenomenon is reduced, and the experience of participants is smoother.
And step 8: and the cloud service judges and analyzes the interaction logic according to the interaction information collected by each side, executes corresponding interaction operation and updates the state of the shared scene.
Specifically, after receiving the interaction information uploaded by multiple participants at the same time, the cloud service firstly judges the interaction authority and priority of the participants and processes the information item by item according to the priority. And as an object is interacted by multiple persons at the same time, only the participant with the highest priority is selected to execute the related interaction, so that the interaction conflict is avoided. And after the interaction is executed, updating the scene in the cloud service, and re-rendering the images of the main rendering visual angles.
And step 9: and circularly repeating the steps 1-8 until the task is terminated or ended.
Specifically, the cloud side performs loop calculation of each frame according to steps 1-8 until the task is terminated or ended.
It should be noted that the foreground images of multiple different viewing angles prepared in advance in step 7 refer to that after the shared scene is established and before the real-time interaction starts, the foreground objects are subjected to stereo surround shooting at the same distance and interval in the cloud service, as shown in fig. 5, and the obtained foreground object pictures of each viewing angle are the foreground images of multiple different viewing angles prepared in advance and are sent to each side service.
According to the invention, through the hierarchical rendering and interaction mechanism of the cloud edge, a scene can be efficiently displayed and operated by multiple people in remote sharing, the mixed reality equipment requirement and the computing resource requirement of an end-side user are greatly reduced, and meanwhile, the user quantity and the interaction experience of the multi-people remote mixed reality interaction can be improved by only adding the edge service resource with low cost under the condition that the cloud service GPU resource does not need to be expanded, so that better support is provided for applications such as remote education and remote cooperation.
As shown in fig. 6, the present invention further includes a hierarchical rendering and interaction system for a multi-person remote mixed reality sharing scene, including:
the participant observation visual angle information collection module is used for collecting the observation visual angle information of all participants in a multi-person remote mixed reality sharing scene in the cloud service;
a participant clustering module used for clustering all participants based on the approximation degree of the viewpoint positions and the view angle directions of the participants to obtain n participant sets Ei, i =1,2, …, n,
the main rendering visual angle generating module is used for calculating a main viewpoint position Pi, a main sight direction Di and a main visual angle range Vi of each participant set Ei, and generating a main rendering visual angle Ri based on Pi, di and Vi so that Ri can cover observation visual angles of all participants in Ei;
the cloud rendering resource allocation module is used for allocating a cloud rendering resource for each participant set Ei in the cloud service, and the cloud rendering resource is used for rendering and interactive calculation of a main rendering view Ri; simultaneously rendering a background image Bi, a foreground image Fi and an interactive object mask image Mi aiming at each main rendering visual angle Ri;
the side service module is used for the cloud service to send the main rendering view Ri, the background image Bi, the foreground image Fi and the interactive object mask image Mi to the side service; the side service calculates the relative position relationship between the actual observation visual angle Rij and the main rendering visual angle Ri of any participant j in the Ei, and performs perspective transformation and cutting on Bi, fi and Mi to obtain a background image Bij, a foreground image Fij and an interactive object mask Mij which are unique to the participant j; the side service fuses the background image Bij and the foreground image Fij to obtain a display image Wij approximate to the actual observation visual angle of the participant j, and sends the Wij to the side equipment of the participant j;
the end-side equipment module is used for displaying the participant j in real time after the end-side equipment of the participant j receives the display image Wij, recording the interactive operation of the participant in a Wij image coordinate system, feeding back the interactive information to the side service, and simultaneously sending the real-time observation visual angle information of the participant to the side service;
the temporary frame supplementing image fusion module is used for comparing and analyzing the side service with the corresponding interactive object mask Mij after the side service receives the interactive position based on the display image Wij, and judging whether the side service belongs to an interactive area or not; if the side service belongs to the side service, the side service sends the interaction information to the cloud service, and the cloud service uniformly processes and executes response; if not, no operation is carried out; meanwhile, the side service uploads the received observation visual angle information to the cloud service in real time, and selects a plurality of images with the closest visual angles from a plurality of foreground images with different visual angles prepared in advance to perform interpolation processing according to the change of the observation visual angles before the cloud service issues new Bi, fi and Mi, so as to quickly generate a new foreground image with approximate effect, perform perspective transformation and cutting on a background image synchronously, and finally fuse a foreground and a background into a temporary frame supplementing image to be issued to the side equipment in real time;
the cloud service interaction operation module is used for judging and analyzing interaction logic, executing corresponding interaction operation and updating the state of a shared scene by the cloud service according to the interaction information collected by each side;
and the cyclic operation module is used for cyclically and repeatedly executing the operations of the modules until the task is stopped or ended.
The invention also comprises a hierarchical rendering and interaction device for the multi-person remote mixed reality sharing scene, which comprises a memory and one or more processors, wherein executable codes are stored in the memory, and when the one or more processors execute the executable codes, the hierarchical rendering and interaction device is used for realizing the hierarchical rendering and interaction method for the multi-person remote mixed reality sharing scene
The present invention also includes a computer readable storage medium having a program stored thereon, which when executed by a processor, implements a hierarchical rendering and interaction method for a multi-person remote mixed reality sharing scene of the present invention as shown in fig. 1.
The invention also provides a schematic structural diagram of the hierarchical rendering and interaction device for the multi-person remote mixed reality sharing scene, which corresponds to the structural diagram shown in fig. 6. As shown in fig. 6, the XXX device includes, at the hardware level, a processor, an internal bus, a network interface, a memory, and a non-volatile memory, although it may also include hardware required for other services. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs the computer program to implement the method described in fig. 1 above. Of course, besides the software implementation, the present invention does not exclude other implementations, such as logic devices or combination of software and hardware, and the like, that is, the execution subject of the following processing flow is not limited to each logic unit, and may be hardware or logic devices.
Improvements to a technology can clearly be distinguished between hardware improvements (e.g. improvements to the circuit structure of diodes, transistors, switches, etc.) and software improvements (improvements to the process flow). However, as technology advances, many of today's process flow improvements have been seen as direct improvements in hardware circuit architecture. Designers almost always obtain the corresponding hardware circuit structure by programming an improved method flow into the hardware circuit. Thus, it cannot be said that an improvement in the process flow cannot be realized by hardware physical modules. For example, a Programmable Logic Device (PLD), such as a Field Programmable Gate Array (FPGA), is an integrated circuit whose Logic functions are determined by programming the Device by a user. A digital system is "integrated" on a PLD by the designer's own programming without requiring the chip manufacturer to design and fabricate application-specific integrated circuit chips. Furthermore, nowadays, instead of manually manufacturing an Integrated Circuit chip, such Programming is often implemented by "logic compiler" software, which is similar to a software compiler used in program development and writing, but the original code before compiling is also written by a specific Programming Language, which is called Hardware Description Language (HDL), and HDL is not only one but many, such as ABEL (Advanced Boolean Expression Language), AHDL (alternate Hardware Description Language), traffic, CUPL (core universal Programming Language), HDCal, jhddl (Java Hardware Description Language), lava, lola, HDL, PALASM, rhyd (Hardware Description Language), and vhigh-Language (Hardware Description Language), which is currently used in most popular applications. It will also be apparent to those skilled in the art that hardware circuitry that implements the logical method flows can be readily obtained by merely slightly programming the method flows into an integrated circuit using the hardware description languages described above.
The controller may be implemented in any suitable manner, for example, the controller may take the form of, for example, a microprocessor or processor and a computer readable medium that stores computer readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, an Application Specific Integrated Circuit (ASIC), a programmable logic controller, and embedded microcontrollers, examples of which include, but are not limited to, the following microcontrollers: ARC 625D, atmel AT91SAM, microchip PIC18F26K20, and Silicone Labs C8051F320, the memory controller may also be implemented as part of the control logic for the memory. Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may thus be considered a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. One typical implementation device is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functions of the units may be implemented in the same software and/or hardware or in a plurality of software and/or hardware when implementing the invention.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The invention may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The invention 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, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments of the present invention are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A multi-person remote mixed reality sharing scene oriented hierarchical rendering and interaction method is characterized by comprising the following steps:
step 1: collecting observation visual angle information of all participants in a multi-person remote mixed reality sharing scene in a cloud service; the observation visual angle information comprises a viewpoint position, a sight line direction and a visual angle range of each participant under a shared scene coordinate system;
step 2: based on the viewpoint positions of participants and the approximation degree of the view angle direction, clustering all the participants to obtain n participant sets Ei, i =1,2, …, n;
and step 3: calculating to obtain a main viewpoint position Pi, a main sight direction Di and a main visual angle range Vi of each participant set Ei, and generating a main rendering visual angle Ri based on Pi, di and Vi so that Ri can cover the observation visual angles of all participants in Ei;
and 4, step 4: in the cloud service, allocating a cloud rendering resource for each participant set Ei for rendering and interactive calculation of a main rendering view Ri; simultaneously rendering a background image Bi, a foreground image Fi and an interactive object mask image Mi aiming at each main rendering visual angle Ri;
and 5: the cloud service sends the main rendering view Ri, the background image Bi, the foreground image Fi and the interactive object mask image Mi to a side service; the side service calculates the relative position and posture relation between the actual observation visual angle Rij and the main rendering visual angle Ri of any participant j in the Ei, and performs perspective transformation and cutting on Bi, fi and Mi to obtain a background image Bij, a foreground image Fij and an interactive object mask Mij which are unique to the participant j; the side service fuses the background image Bij and the foreground image Fij to obtain a display image Wij approximate to the actual observation visual angle of the participant j, and sends the Wij to the side equipment of the participant j;
step 6: the end-side equipment of the participant j receives the display image Wij and then displays the display image Wij in real time, records the interactive operation of the participant in a Wij image coordinate system, feeds back the interactive information to the side service, and simultaneously sends the real-time observation visual angle information of the participant to the side service;
and 7: after receiving the interaction position based on the display image Wij, the side service performs comparative analysis with the corresponding interactive object mask Mij to judge whether the side service belongs to an interactive area; if the side service belongs to the side service, the side service sends the interaction information to the cloud service, and the cloud service uniformly processes and executes response; if not, no operation is carried out; meanwhile, the side service uploads the received observation visual angle information to the cloud service in real time, and selects a plurality of images with the closest visual angles from a plurality of foreground images with different visual angles prepared in advance to perform interpolation processing according to the change of the observation visual angles before the cloud service issues new Bi, fi and Mi, so as to quickly generate a new foreground image with approximate effect, perform perspective transformation and cutting on a background image synchronously, and finally fuse a foreground and a background into a temporary frame supplementing image to be issued to the side equipment in real time;
and 8: the cloud service judges and analyzes interaction logic according to the interaction information collected by each side, executes corresponding interaction operation and updates the state of the shared scene;
and step 9: and circularly repeating the steps 1-8 until the task is terminated or ended.
2. The method for hierarchical rendering and interaction of a multi-person-oriented remote mixed reality sharing scene as claimed in claim 1, wherein the participants in the step 1 comprise real human beings capable of autonomous interaction and virtual digital persons driven by data or programs.
3. The method for hierarchical rendering and interaction of a multi-person-oriented remote mixed reality sharing scene as claimed in claim 1, wherein in the step 2, all participants in each participant set Ei satisfy between two each other:
a) The three-dimensional geometric distance of the viewpoint position is smaller than a distance threshold value d;
b) The angular deviation of the viewing direction is less than an angular threshold theta.
4. The multi-user-oriented hierarchical rendering and interaction method for the shared scene of the remote mixed reality of multiple people according to claim 1, wherein the interactive object mask Mi in the step 4 is a projection of an interactive object on a rendering plane in the visual angle, the value of the interactive position is 1, and the value of the non-interactive position is 0; the types of interactable objects include two-dimensional and three-dimensional virtual objects and user interfaces.
5. The hierarchical rendering and interaction method for multi-person-oriented remote mixed reality sharing scene according to claim 1, wherein the side service in step 5 fuses a background map and a foreground map, the specific fusion method is determined according to the side device, if the side device executes a virtual reality application, the foreground map is superimposed on the background map, and a fused image is output; if the end-side equipment executes the augmented reality application, the shielding condition of the real object to the foreground and the background is calculated according to the application requirement and the real environment state, the real image, the foreground image with the transparent channel and the background image after part of the foreground image is shielded by the real object are fused, and the fused image is output.
6. The hierarchical rendering and interaction method for multi-person-oriented remote mixed reality sharing scene according to claim 1, wherein the side service in step 7 merges a background map and a foreground map, the specific merging method is determined according to the side device, if the side device executes a virtual reality application, the foreground map is superimposed on the background map, and a merged image is output; and if the end-side equipment executes augmented reality application, calculating the shielding condition of the real object to the foreground and the background according to the application requirement and the real environment state, fusing the real image, the foreground image with the transparent channel and the background image after part of the foreground image is shielded by the real object, and outputting the fused image.
7. The multi-user-oriented hierarchical rendering and interaction method for a remote mixed reality shared scene according to claim 1, wherein the pre-prepared foreground images from a plurality of different viewing angles in step 7 are obtained by performing stereo surround shooting on foreground objects at the same distance and interval in a cloud service after the shared scene is established and before real-time interaction begins, and the obtained foreground object pictures from the respective viewing angles are the pre-prepared foreground images from the plurality of different viewing angles and are sent to the respective side services.
8. A multi-person-oriented hierarchical rendering and interaction system for remote mixed reality sharing scenes is characterized by comprising:
the participant observation visual angle information collection module is used for collecting the observation visual angle information of all participants in the multi-person remote mixed reality sharing scene in the cloud service;
a participant clustering module used for clustering all participants based on the approximation degree of the viewpoint positions and the view angle directions of the participants to obtain n participant sets Ei, i =1,2, …, n,
the main rendering visual angle generating module is used for calculating a main viewpoint position Pi, a main sight direction Di and a main visual angle range Vi of each participant set Ei, and generating a main rendering visual angle Ri based on Pi, di and Vi so that Ri can cover observation visual angles of all participants in Ei;
the cloud rendering resource allocation module is used for allocating a cloud rendering resource for each participant set Ei in the cloud service, and the cloud rendering resource is used for rendering and interactive calculation of a main rendering view Ri; simultaneously rendering a background image Bi, a foreground image Fi and an interactive object mask image Mi aiming at each main rendering visual angle Ri;
the side service module is used for the cloud service to send the main rendering view Ri, the background image Bi, the foreground image Fi and the interactive object mask image Mi to the side service; the side service calculates the relative position and posture relation between the actual observation visual angle Rij and the main rendering visual angle Ri of any participant j in the Ei, and performs perspective transformation and cutting on Bi, fi and Mi to obtain a background image Bij, a foreground image Fij and an interactive object mask Mij which are unique to the participant j; the side service fuses the background image Bij and the foreground image Fij to obtain a display image Wij approximate to the actual observation visual angle of the participant j, and sends the Wij to the side equipment of the participant j;
the end-side equipment module is used for displaying the participant j in real time after the end-side equipment of the participant j receives the display image Wij, recording the interactive operation of the participant in a Wij image coordinate system, feeding back the interactive information to the side service, and simultaneously sending the real-time observation visual angle information of the participant to the side service;
the temporary frame supplementing image fusion module is used for comparing and analyzing the side service with the corresponding interactive object mask Mij after the side service receives the interactive position based on the display image Wij, and judging whether the side service belongs to an interactive area or not; if the side service belongs to the side service, the side service sends the interaction information to the cloud service, and the cloud service uniformly processes and executes response; if not, no operation is carried out; meanwhile, the side service uploads the received observation visual angle information to the cloud service in real time, and selects a plurality of images with the closest visual angles from a plurality of foreground images with different visual angles prepared in advance to perform interpolation processing according to the change of the observation visual angles before the cloud service issues new Bi, fi and Mi, so as to quickly generate a new foreground image with approximate effect, perform perspective transformation and cutting on a background image synchronously, and finally fuse a foreground and a background into a temporary frame supplementing image to be issued to the side equipment in real time;
the cloud service interaction operation module is used for judging and analyzing interaction logic, executing corresponding interaction operation and updating the state of a shared scene by the cloud service according to the interaction information collected by each side;
and the cyclic operation module is used for cyclically and repeatedly executing the operations of the modules until the task is stopped or ended.
9. A multi-person remote mixed reality sharing scene oriented hierarchical rendering and interaction device, comprising a memory and one or more processors, wherein the memory stores executable codes, and the one or more processors execute the executable codes to implement the multi-person remote mixed reality sharing scene oriented hierarchical rendering and interaction method according to any one of claims 1 to 7
10. A computer-readable storage medium, on which a program is stored, which, when executed by a processor, implements the method for hierarchical rendering and interaction for a multi-person remote mixed reality sharing scene of any one of claims 1 to 7.
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