CN107333122B - A projection type multi-picture stereoscopic display and playback system and method - Google Patents

Abstract

The invention discloses a projection-type multi-picture stereoscopic display and playback system and method, including a multi-picture projection array, a GPU-based real-time mixing-splicing-rendering module and multi-picture stereo glasses, wherein the multi-picture projection array includes a multi-picture projection array. Group projection combination, each group of projection combination plays multiple independent stereo video streams, and the GPU-based real-time mixing-splicing-rendering module performs real-time rendering, mixing encoding and correction of the multi-channel stereoscopic video of each group. The stereoscopic video stream is connected to each group of projection combination for projection and playback, and the opening and closing sequence of the liquid crystal lens of the multi-screen stereoscopic glasses is controlled so that it corresponds to the multi-channel stereoscopic video stream, and the multi-channel stereoscopic video stream can be viewed independently. Group projection forms multi-person multi-screen stereo playback.

Description

A projection type multi-picture stereoscopic display and playback system and method

technical field

The invention relates to a projection type multi-picture stereoscopic display and playback system and method.

Background technique

Stereoscopic image is a common form of always-playing display in today's film and television works and virtual reality content, which can make the audience feel a strong immersive experience. Through human-computer interaction and intention understanding, the stereoscopic video content can be rendered in real time according to the user's moving position, resulting in a stereoscopic visual effect that conforms to the user's moving perspective, making the user feel that he is the protagonist, and greatly enhancing the user's experience. Presence and immersion.

However, at present, the 3D stereoscopic display and playback technology used in movies and TV are all drawn based on a single viewpoint. When multiple groups of users watch and interact with the system at the same time, only a set of stereoscopic images with a fixed viewpoint can be played and displayed in the screen area. Make group users have a real sense of immersion at the same time.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention proposes a projection-type multi-picture stereoscopic display and playback system and method. The present invention simultaneously projects and plays multiple groups of different stereoscopic videos in the same screen area through a projector array, which are in different groups, different By wearing special shutter-type liquid crystal stereo glasses, users with a viewing angle can independently watch their own set of corresponding stereoscopic videos, which are simple, convenient, easy to operate, and have a strong sense of immersion. Combination to realize various types of interactive virtual reality systems with multiple people and multiple paintings.

In order to achieve the above object, the present invention adopts the following technical solutions:

A projection type multi-picture stereoscopic display and playback system includes a multi-picture projection array, a GPU-based real-time mixing-splicing-rendering module and multi-picture stereo glasses, wherein the multi-picture projection array includes multiple sets of projection combinations, each The projection combination plays multiple independent stereo video streams, and the GPU-based real-time mixing-splicing-rendering module performs real-time rendering, mixing coding and correction for each group of multi-channel stereo videos, and connects the generated multi-channel stereo video streams to each Projection and playback are performed on the group projection combination, and the opening and closing sequence of the liquid crystal lens of the multi-screen stereo glasses is controlled to correspond to the multi-channel stereo video streams, and the multi-channel stereo video streams can be watched independently, and the formation of multiple groups of projections to form multiple Stereoscopic playback of the screen.

A horizontal polarizer and a vertical polarizer are arranged between the multi-picture projection array and the multi-picture stereo glasses.

Preferably, three projectors are grouped into a group, and in the first projection period, the three projectors are made to project three plane images of R, G, and B of the first stereoscopic video image respectively to form a complete color images, and in the second projection period and the third projection period, the three projectors are made to project the R, G, B three-dimensional images of the second and third stereoscopic video images respectively, so that in the In three different projection periods, three different video images are uniquely displayed on the screen in sequence, so as to realize the independent time-sharing playback of the three-way stereoscopic video.

Further, in order to realize the above functions, the color wheel of the first projector of each group of projection combination keeps the original RGB order unchanged, the color wheel of the second projector is transformed into BRG order, and the color wheel of the third projector is in BRG order. Wheels are retrofitted to GBR order.

During the installation of the multi-projection array, a vertical arrangement is adopted, the three-dimensional projectors in the array are placed in the upper, middle and lower order, and the position of each group of projections is adjusted to ensure the projection images of each projector in each group of projection combinations. The regions roughly coincide.

The GPU-based real-time mixing-splicing-rendering module obtains multi-channel stereo video by setting multiple groups of virtual stereo cameras, wherein each group of virtual stereo cameras includes two virtual cameras, left and right, for obtaining the corresponding user's data. Left and right eye images.

The GPU-based real-time mixing-splicing-rendering module mixes and combines the R, G, and B plane images of the multi-channel independent stereoscopic video to become a new stereoscopic video, so as to ensure that each projector combined by each group of projections is combined. Combined playback of multi-channel stereoscopic video.

The GPU-based real-time mixing-splicing-rendering module performs geometric projection splicing correction on each projector in each group of projection combinations to ensure that the projection images of each projector achieve pixel coincidence, thereby splicing a correct stereoscopic video on the screen image.

The multi-screen stereoscopic glasses correspond to each group of projection combinations to distinguish different types of stereoscopic glasses, so as to correctly watch the stereoscopic video of the corresponding group, and at the same time block other video streams.

The multi-screen stereo glasses shorten the opening time of the liquid crystal lens from the original opening time that lasts for multiple projection periods to one projection period. At the same time, the opening and closing sequence of the liquid crystal lens should be controlled according to the type of glasses and the corresponding video serial number. The traditional equal duty cycle opening and closing sequence has been changed into an unequal duty cycle opening and closing sequence, which ensures that the opening/closing sequence of the liquid crystal lens of the multi-screen stereo glasses is synchronized with the playback sequence of the corresponding group of stereo videos, so that you can watch the corresponding stereoscopic video stream.

The duty ratios of the lens opening and closing cycles of the multi-view stereo glasses are not equal.

Based on the implementation method of the above system, multiple groups of projections are combined to form a multi-picture projection array, each group of projections is combined to play multiple independent stereo video streams, and the The video is rendered in real time, mixed with encoding and correction, and the generated multi-channel stereo video stream is connected to each group of projection combinations for projection playback, and the opening and closing timing of the LCD lens of the multi-screen stereo glasses is controlled to match the multi-channel stereo video stream. Correspondingly, it is possible to independently watch multi-channel stereo video streams, and realize multi-group projection to form multi-person multi-screen stereo playback.

Compared with the prior art, the beneficial effects of the present invention are:

(1) The present invention can realize the multi-person multi-picture stereoscopic display and playback function, and has the advantages of simplicity, convenience, easy operation, strong immersion, etc. Interactive virtual reality system;

(2) The present invention simultaneously projects and plays multiple groups of different stereoscopic videos in the same screen area through a projector array, and users in different groups and different viewing angles can independently watch their own exclusive glasses by wearing special shutter-type liquid crystal stereoscopic glasses. A corresponding set of stereoscopic videos;

(3) Based on the multi-picture display and playback system proposed by the present invention, various somatosensory interaction technologies can be designed and configured to realize multi-person multi-picture interactive theater and virtual reality system, which can make group users produce a real immersive feeling at the same time .

Description of drawings

The accompanying drawings that form a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute improper limitations on the present application.

Fig. 1 is the overall structure diagram of multi-picture stereoscopic display and playback system;

Figure 2 is a color wheel device of a dedicated multi-picture stereo projector;

3 is a schematic diagram of a playback sequence of a common DLP stereo projector;

4 is a schematic diagram of a playback sequence of a dedicated multi-picture stereo projector;

Fig. 5 is a functional flow chart of the real-time rendering module of the multi-picture stereoscopic display and playback system;

FIG. 6 is a schematic diagram showing the opening and closing timing of the dedicated multi-image stereoscopic liquid crystal glasses.

Detailed ways:

The present invention will be further described below with reference to the accompanying drawings and embodiments.

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

As described in the background art, the 3D stereoscopic display and playback technology currently used in movies and TVs in the prior art are all drawn based on a single point of view. When multiple groups of users watch and interact with the system at the same time, only the Displaying a group of stereoscopic images with fixed viewpoints cannot make group users feel real immersive at the same time. In order to solve the above technical problems, the present application proposes a design and implementation method of a projection type multi-screen stereoscopic display and playback system, which can In the same screen area, 6 different stereoscopic videos are played for 6 groups of different users at the same time, and users can watch the corresponding stereoscopic images independently by group. The system can be combined with somatosensory human-computer interaction equipment to form a variety of interactive virtual reality systems with multiple people and multiple paintings.

The present invention designs a projection-type 6-person 6-picture stereoscopic display system, in which 6 groups of different stereoscopic videos are simultaneously projected and played in the same screen area through a projector array, and users in different groups and different viewing angles wear special shutters. Type LCD stereoscopic glasses, you can watch your own exclusive corresponding set of stereoscopic videos independently. Based on the multi-picture display and playback system proposed by the present invention, a multi-person multi-picture interactive cinema and virtual reality system can be realized by designing and configuring various somatosensory interaction technologies. The present invention firstly redesigns the projector structure and projection sequence to form a dedicated multi-picture projection array, and then designs and implements a GPU-based real-time mixing-splicing-rendering module for converting each group of independent video streams into multi-picture videos Finally, the control circuit of the shutter-type liquid crystal stereo glasses is redesigned to realize the viewing of multi-picture stereo video by group. These three parts are designed and combined to form a multi-picture stereo display and playback system.

The present invention proposes a projection type multi-screen stereoscopic display and playback system and method, which realizes the function of 6-person 6-picture stereoscopic display and playback, and has the advantages of simplicity, convenience, easy operation, strong immersion and the like, and can be combined with related somatosensory human-computer interaction technology Combination to realize various types of interactive virtual reality systems with multiple people and multiple paintings.

The multi-picture stereoscopic display and playback system proposed by the present invention consists of three modules: a dedicated multi-picture projection array, a GPU-based real-time mixing-splicing-rendering module and a dedicated multi-picture shutter stereo glasses device. The specific technical solutions are as follows:

The multi-person multi-picture stereoscopic display and playback system proposed by the present invention uses 6 DLP-type 3D projectors to form a projection and playback array to perform stereoscopic video playback. First realize the 3-person 3-picture playback function, that is, 6 projectors are divided into two groups according to each group of 3, and through the redesign of the projector structure and playback mode, the 3 projectors in each group can be combined to project Playing out 3 independent stereoscopic video streams, and by redesigning the control sequence of the shutter-type liquid crystal stereoscopic glasses, changing the opening and closing timing of the liquid crystal lens, and producing 3 types of special multi-picture shutter stereoscopic glasses, which can watch 3-channel stereoscopic video independently. Then combined with the polarization stereo mode, a horizontal polarizer and a vertical polarizer were added in front of the two sets of projectors and shutter-type stereo glasses, and the two groups of 3-person 3-screen stereo playback systems were combined into a 6-person 6-screen stereo playback system. The structure diagram is shown in Figure 1.

The basic module of the multi-picture stereoscopic display and playback system proposed by the present invention is to realize 3-person 3-picture stereoscopic display. We use 3 DLP-type 3D projectors to form a dedicated multi-picture projection array. The stereoscopic video stream is converted into a dedicated multi-picture stereoscopic video stream format, and 3 independent stereoscopic videos are played through a combination of multi-picture projection arrays. , playback mode and control timing are redesigned. In order to clearly describe the working principle and process of the device, the playing principle of the existing DLP type 3D projector is firstly introduced, and then the realization principle of the display module, real-time rendering module and main control module of the multi-picture stereoscopic display system is introduced in turn. The composition of the equipment is described.

The current digital projection technology is mainly divided into two types: DLP type and LCD type. The former is reflective projection and the latter is transmissive projection. DLP projection technology is widely used in large-scale playback occasions due to its high projection brightness. Cinema and interactive entertainment facilities. The LCD projector modulates the incident intensity of the light source by adjusting the reflection angle of the digital micromirror (DMD). When realizing color image projection, the DLP projector adopts the mode of time-sharing projection and composite playback of three primary colors. The method is to install a glass circular color wheel in front of the white light source, and the circular color wheel is divided into red in the order of the three primary colors. (R)-green (G)-blue (B) three color segments for color separation of light sources. The color wheel rotates at a high speed under the drive of the motor. When the three color segments of red (R)-green (G)-blue (B) rotate to the front of the white light source in turn, the light source becomes red light-green light-blue light in turn and projected to the digital micro. On the mirror, at the same time, the digital micromirror reflects and modulates the incident light according to the three bit plane values of red, green and blue of the digital image, and converts the three bits of red (R), green (G) and blue (B) of the digital image. The planes are projected onto the screen in turn, and then a complete color image is formed in the human visual system through the phenomenon of persistence of vision.

In order to explain the working principle of the special multi-picture stereo glasses in the present invention later, it is necessary to describe the technical principle of the 3D stereo video playback of the DLP projector. When the projector is placed in 3D playback mode, the image refresh rate of the projector is 120Hz, that is, 120 frames of images are played per second, including 60 frames for the left eye image and 60 frames for the right eye image. Sequential, the so-called frame sequence format is projected onto the screen to form a stereoscopic video. The audience needs to wear shutter-type stereoscopic glasses to watch the stereoscopic video. The two lenses of the shutter stereoscopic glasses are composed of liquid crystal lenses. So that the audience has a stereoscopic visual effect. In this process, the important point is to realize the synchronization of the opening and closing timing of the liquid crystal lens and the image playback timing of the left and right eyes. At present, the photoelectric stereo synchronization of DLP type 3D projectors basically adopts the DLP-LINK standard of TI company. After the projection of a frame of image, the projector projects an instantaneous light pulse with extremely high brightness on the screen through the reflection of the DMD chip. Due to the extremely short duration of the pulse, the human eye cannot perceive it. The optical pulse signal is converted into an electrical pulse signal, which is used as a synchronization signal to control the opening and closing timing of the liquid crystal lens. The three-dimensional synchronization optical pulse frequency emitted by the DLP type projector is 120Hz, which is the same as the image refresh rate of the projector, and the pulse width is about 2μs. On the screen, it is synthesized into a complete color image in the human visual system through the phenomenon of persistence of vision.

The following describes the design methods of the three modules in the multi-picture stereoscopic display and playback system:

(1) Design of a dedicated multi-picture projection array

According to the above introduction to the projection imaging principle of the DLP projector, the projection imaging process of the color image by the single-chip DLP type projector is divided into 3 time periods. In accordance with the rotation period of the color wheel, digital images are projected in each time period. The three plane images of R, G and B of the image are finally used to form a color image by the phenomenon of visual temporal detachment. The multi-screen display principle based on the DLP projector is to redesign the color wheel structure and playback mode of the projector according to the process of time-sharing projection and composite imaging: 3 DLP projectors are grouped into a group, In the first projection period, three projectors are made to project the R, G, and B three-dimensional images of the first stereoscopic video image to form a complete color image, and in the second projection period and the third In each projection period, three projectors are used to project the R, G, and B three-dimensional images of the second and third stereoscopic video images respectively, so that in three different projection periods, the It uniquely displays three different video images, and realizes independent time-sharing playback of three-way stereoscopic video. In this playback mode, although the projection imaging time of each video image is shortened from three time periods to one time period, the simultaneous projection of three projectors increases the projection light intensity per unit time, which offsets the shortening of the projection time. So that each channel of video can still basically guarantee the original brightness.

In order to realize the above functions, the structure of the color wheel needs to be redesigned first to change the color projection sequence of the projector, so as to ensure the correct synthesis of color images. First, transform the color wheel structure of the projector: the color wheel of the first projector keeps the inherent RGB order unchanged, as shown in the color wheel on the left side of Figure 2; while the color wheel of the second projector is transformed into the GBR order, as shown in the figure 2 The color wheel in the middle; the color wheel of the third projector is transformed into BRG order, as shown in the color wheel on the right side of Figure 2 (it should be noted that in the current common color wheel mode of DLP projectors, except for the RGB three primary color segments , and also add a total of 5 color segments of white and cyan, of which the white segment and the cyan segment are used to compensate the color saturation of the projected image and do not affect the above-mentioned image projection mode).

After the above redesign of the projector color wheel, in the first projection period, the color segments where the three projectors are located are R-G-B respectively; in the second projection period, the color segments where the three projectors are located are They are G-B-R respectively; in the third projection period, the color segments where the three projectors are located are B-R-G, so that each projection period has three primary colors of R, G, and B projected to ensure the correct synthesis of color images. In order to illustrate this process, FIG. 3 and FIG. 4 are used for comparison and description. Figure 3 shows that when the color wheel is not replaced, the color wheels of the three projectors keep the RGB order, and the video is played according to the original playback mode. It can be seen that in this case, in each projection period, the screen appears at the same time. The corresponding plane images of the three-channel video images, the three-channel video images are always aliased on the screen, and cannot be played and watched independently. Figure 4 shows the projection effect presented by an array of three projectors after redesigning the color wheel of the projector. Due to the change of the color wheel structure, in each projection period, the screen uniquely displays an independent channel The video image, thus realizing the independent time-sharing playback of the three-channel video. During the specific installation of the multi-picture projection array, a vertical arrangement is adopted, the three stereo projectors in the array are placed in the upper, middle and lower order, and the positions of the three projectors are fine-tuned to ensure that the projected image area of the three projectors is roughly coincide.

GPU-based real-time mixing-splicing-rendering module

In order to cooperate with the dedicated multi-picture projection array, it is also necessary to perform real-time mixing and splicing processing on the three-channel video images, and perform real-time rendering to form a multi-picture stereoscopic video stream format. First of all, different from the original mode in which each projector is only responsible for projecting and playing one video, in the playback mode of the 3-picture projection array, the picture played by each projector is no longer composed of 3 planes of a single picture. Instead, they extract one plane from the three-channel video images and then mix them together. Secondly, the projection images of the three projectors placed vertically in the projection array can only be roughly overlapped, and cannot be truly spliced into a complete color video image. . Therefore, it is necessary to perform geometric projection splicing correction to ensure that the projection images of the three projectors achieve pixel coincidence, so that they can be spliced into a correct stereoscopic video image on the screen. In order to ensure the timeliness of the real-time rendering of the video, the realization of the above functions is completed based on the GPU acceleration of the display card, which is the second technical problem to be solved in the present invention. The solution is as follows:

The functions realized by the real-time mixing-splicing-rendering module of the multi-picture stereoscopic display and playback system include the following three aspects: (1) real-time rendering and generation of three-way stereoscopic video; (2) mixed coding of three-way stereoscopic video images; (3) ) Combined correction of three-way stereoscopic video images. The final generated three-way stereoscopic video flow is connected to three DLP projectors for projection and playback with multi-screen split display hardware. The real-time rendering module of the multi-picture stereoscopic display and playback system is shown in Figure 5.

Among them, function (1) can obtain 3-channel stereo video by setting 3 groups of virtual stereo cameras in the virtual reality/game production software platform, wherein each group of virtual stereo cameras includes two virtual cameras, left and right, for obtaining Corresponding to the user's left and right eye images.

Function (2) Realize the mixed coding of three-way stereoscopic video images, the purpose of which is to mix and combine the R, G, and B bit-plane images of the three-way independent stereoscopic video, and mix the three-way images listed in Figure 4. The form is combined into a new stereoscopic video to ensure that the three-way stereoscopic video is played through the combination of three DLP projector arrays. In order to ensure real-time rendering, this function writes Shader code in CG language and performs real-time processing through GPU.

In function (3), the stitching correction of the three-channel stereoscopic video images is the last link of the multi-picture stereoscopic video playback, and is used for stitching and correcting the three-channel mixed stereoscopic video images. Since in the projector array, the RGB three-plane images of each channel of video are projected onto the screen by three projectors respectively, it is necessary to perform geometric correction on the images projected and played by each projector to ensure that Realize the overlapping of the planes on the screen to correctly synthesize color images. In this process, the standard checkerboard calibration images projected by three projectors need to be taken first, and the deformation parameters of the stitching are determined according to the corresponding corner points in the three checkerboard calibration images, and the deformation parameters are used as the input of the Shader code written in CG language. , real-time distortion correction of 3-channel video images through GPU. In order to ensure the real-time performance of image correction, it needs to be accelerated by GPU.

(3) Design of special multi-picture shutter stereo glasses

After realizing the time-sharing and independent playback of the three-channel video through the projector array, it is also necessary to design the control circuit of the special multi-picture stereo glasses accordingly, and design three different types of shutter stereo glasses according to the group to correctly watch the corresponding group. For other stereoscopic videos, the other two video streams are blocked at the same time. This needs to achieve two functions. The first is to shorten the opening time of the liquid crystal lens, from the original opening time of 3 projection periods to 1 projection period. At the same time, it is necessary to control the opening and closing of the liquid crystal lens according to the type of glasses and the corresponding video serial number. The timing is changed from the traditional equal duty cycle opening and closing sequence to the unequal duty cycle opening and closing sequence to ensure that the opening/closing sequence of the liquid crystal lens of the shutter glasses is synchronized with the playback sequence of the corresponding group of stereo video, so as to watch the corresponding stereoscopic video stream. In order to illustrate the working principle of the special multi-picture stereoscopic liquid crystal glasses designed in the present invention, FIG. 6 compares the opening and closing working sequence of the ordinary shutter type liquid crystal glasses and the special multi-picture stereoscopic glasses.

In FIG. 6 , the first row is a 120 Hz DLP LINK optical pulse synchronization signal, which is synchronized with the stereoscopic video playback timing of the projector, and is the synchronization reference for the opening and closing timing of the shutter-type stereoscopic glasses lenses. The second row and the third row are the opening and closing timing of the left eye and right eye lenses of ordinary shutter glasses. The left and right eye lenses open and close alternately. The opening and closing frequency is 120Hz. , including three projection periods of RGB, which can correctly watch ordinary single-channel stereoscopic video. Lines 4-6 in the figure are the opening and closing timings of the left-eye lens of the modified multi-painting shutter glasses, rows 7-9 are the opening and closing timings of the right-eye lens of the modified multi-painting shutter glasses, and the modified multi-painting shutter glasses are divided into Type 3 (No. 1, No. 2, No. 3), the liquid crystal lens is turned on in the first, second and third projection periods in sequence, so that the stereoscopic video played in the corresponding period can be watched. Two points need to be emphasized here: First, the duty ratios of the opening and closing periods of the lenses are no longer equal to the reconstructed multi-paint shutter glasses. This is because the opening and closing of the multi-picture shutter glasses needs to be synchronized with the corresponding projection period, which is an important difference from ordinary shutter glasses. Second, in Figure 5, the opening time of the liquid crystal lens is 1.7ms, that is, the three projection periods of the projector's RGB are 1.7ms respectively, a total of 5.1ms, which does not fill the 8.3ms playback period of a single eye screen. This is because most of the current DLP projectors actually use RGBCWY (red, green, blue, green, white and yellow) 6-segment color wheel, of which the RGB three-segment color wheel still corresponds to the playback of the R, G, and B plane images of the screen, while In the three additional color segments of CWY (cyan, white and yellow), the projector does not project any image signal, but simply projects the three complementary colors of cyan, white and yellow light to the screen to improve the color fidelity of the DLP projector. In the opening and closing sequence of the reconstructed multi-picture shutter glasses, the additional three projection periods of CWY (cyan, white and yellow) should be excluded.

Combining the designs of the above three modules, the present invention realizes a projection type multi-picture stereoscopic display and playback system, which realizes the function of 6-person and 6-picture stereoscopic display and playback.

Compared with the prior art, the present invention has very good advantages.

In the paper C1x6: A Stereoscopic Six-UserDisplay for Co-located Collaboration in Shared Virtual Environments by Weimar-Bauhaus University in Germany in 2011, a projection type multi-screen stereoscopic display system named C1x6 was proposed. The present invention is related to the C1x6 system. The difference is: (1) The multi-channel stereoscopic image projection mode is different, 6 projectors are used in the C1x6 system, of which 3 projectors are used to display the left eye video of 6 users, and the other 3 projectors are used to display the video of 6 users. The right eye video forms a stereoscopic video effect, and 6 projectors must be used at the same time when playing stereoscopic images; and in the present invention, three projectors are used as a group of basic stereoscopic playback units, which can independently complete the left and right eye stereoscopic video playback of 3 users , with the optical polarization device, it can be expanded to 6-user stereoscopic video playback, which is more flexible than the C1x6 system. (2) Based on the difference of the multi-user projection imaging modes in (1), the multi-user stereoscopic image mixing algorithm and the circuit operation timing of the multi-screen shutter stereo glasses used in the present invention are completely different from those of C1x6. (3) Both the C1x6 system and the present invention modify the projector structure, but the C1x6 system replaces the projector color wheel with a transparent color wheel, and uses external red-green-blue filters in front of the projector lens. The method is to transform three color projectors into monochromatic projectors corresponding to three primary colors respectively, and the present invention adjusts the sequence of color segments in the color wheel of the projectors, changes the projection sequence of three primary color bit plane images, and forms a multi-user color image. Time-sharing projection.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they do not limit the scope of protection of the present invention. Those skilled in the art should understand that on the basis of the technical solutions of the present invention, those skilled in the art do not need to pay creative work. Various modifications or deformations that can be made are still within the protection scope of the present invention.

Claims (9)

1. a kind of projection draws stereoscopic display play system more, it is characterized in that: including more picture projected arrays, based on the real-time of GPU Shuffling-splicing-rendering module and more picture anaglyph spectacles, wherein the projected arrays of drawing include that multiple groups projection is combined more, and every group Projection combination plays the independent stereo video streaming of multichannel, and real-time shuffling-splicing-rendering module based on GPU is by every group of multichannel Three-dimensional video-frequency carries out real-time rendering, hybrid coding and correction, and the multichannel stereo video streaming of generation is connected to every group of projection combination On carry out projection broadcasting, the liquid crystal lens for controlling more picture anaglyph spectacles are opened and closed timing, make itself and multichannel stereo video streaming It is corresponding, it can independently watch multichannel stereo video streaming, realize that multiple groups project to form the more picture solids broadcastings of more people；

It is one group that 3 projectors, which are compiled, in first projection period, 3 projectors is made to project first via stereopsis respectively Tri- plane images of R, G, B of frequency image form complete color image, and when second projection period and third project Duan Zhong makes 3 projectors project tri- plane images of R, G, B of the second tunnel and third road stereoscopic video images respectively, so that In three different projection periods, the different video image in three tunnels is successively uniquely shown on screen, realizes three Lu Liti The independent timesharing of video plays；

The group that more picture anaglyph spectacles correspond to every group of projection combination distinguishes different types of anaglyph spectacles, correctly to watch The corresponding other three-dimensional video-frequency of group, while masking other video flowings.

2. a kind of projection as described in claim 1 draws stereoscopic display play system more, it is characterized in that: more picture projection array Horizontal polarizer and vertical polarizer are provided between column and more picture anaglyph spectacles.

3. a kind of projection as described in claim 1 draws stereoscopic display play system more, it is characterized in that: by every group of projection group The colour wheel of the First projector of conjunction keeps intrinsic RGB sequence constant, and the colour wheel of second projector transform BRG sequence as, the The colour wheel of three projectors transform GBR sequence as.

4. a kind of projection as described in claim 1 draws stereoscopic display play system more, it is characterized in that: drawing projected array more Installation when, be laid out using vertical arrangement, each binocular projector in array put according to upper, middle and lower sequence, and adjusted every The position of group projection guarantees that the projected picture region of each projector of every group of projection combination substantially overlaps.

5. a kind of projection as described in claim 1 draws stereoscopic display play system more, it is characterized in that: described based on GPU's Real-time shuffling-splicing-rendering module obtains multichannel three-dimensional video-frequency by setting multiple groups virtual three-dimensional camera, wherein each group empty It include left and right two virtual cameras in quasi- stereoscopic camera, for obtaining the left-and right-eye images of corresponding user.

6. a kind of projection as described in claim 1 draws stereoscopic display play system more, it is characterized in that: described based on GPU's R, G, B plane image of multichannel independence three-dimensional video-frequency are carried out shuffling combination by real-time shuffling-splicing-rendering module, become new Three-dimensional video-frequency, to guarantee to play multichannel three-dimensional video-frequency by each projector combination of every group of projection combination.

7. a kind of projection as described in claim 1 draws stereoscopic display play system more, it is characterized in that: described based on GPU's Real-time shuffling-splicing-rendering module carries out geometric projection splicing correction to each projector of every group of projection combination, guarantees each The projected picture of a projector reaches pixel coincidence, to be spliced into correct three-dimensional video-frequency image on the screen.

8. a kind of projection as described in claim 1 draws stereoscopic display play system more, it is characterized in that: more pictures are three-dimensional Glasses shorten the opening time of liquid crystal lens, and the opening time by originally continuing multiple projection periods shorten to 1 projection period, Simultaneously the opening and closing timing of liquid crystal lens is controlled, is opened by traditional equal duty ratio according to glasses type and corresponding video serial number Timing is closed, becomes not equal duty ratio opening and closing timing, guarantees the opening/closing timing and respective sets of the liquid crystal lens of more picture anaglyph spectacles The broadcasting timing of other three-dimensional video-frequency is synchronised, to watch corresponding stereo video streaming.

9. being combined based on the implementation method of the system as described in any one of claim 1-8 it is characterized in that: multiple groups are projected More picture projected arrays are formed, every group of projection combination plays the independent stereo video streaming of multichannel, utilize the real-time shuffling-based on GPU Every group of multichannel three-dimensional video-frequency is carried out real-time rendering, hybrid coding and correction by splicing-rendering module, and the multichannel of generation is three-dimensional Video flowing is connected in every group of projection combination and carries out projection broadcasting, controls the liquid crystal lens opening and closing timing of more picture anaglyph spectacles, Keep it corresponding with multichannel stereo video streaming, can independently watch multichannel stereo video streaming, realizes that multiple groups project that form more people more Picture solid plays.