CN102361497A - Display method and display system for spatial three-dimensional video - Google Patents
Display method and display system for spatial three-dimensional video Download PDFInfo
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- CN102361497A CN102361497A CN2011103603647A CN201110360364A CN102361497A CN 102361497 A CN102361497 A CN 102361497A CN 2011103603647 A CN2011103603647 A CN 2011103603647A CN 201110360364 A CN201110360364 A CN 201110360364A CN 102361497 A CN102361497 A CN 102361497A
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Abstract
The invention discloses a display method for a spatial three-dimensional video. The display method comprises the following steps of: segmenting ordinary-frame-rate three-dimensional video data into multilayer ordinary-frame-rate two-dimensional video data with different depths; recombining the multilayer ordinary-frame-rate two-dimensional video data with different depths into high-frame-rate two-dimensional video data; projecting the high-frame-rate two-dimensional video data into a three-dimensional space full of micro particles by a projection method; and projecting linear light rays into the three-dimensional space full of the micro particles from a direction vertical to a projection direction, and simultaneously controlling projection positions of the linear light rays to synchronously change with positions in front of and behind the two-dimensional video data before segmentation so that a three-dimensional active video image can be formed in the three-dimensional space full of the micro particles. The invention also discloses a display system for the spatial three-dimensional video, and the display system comprises high-frame-rate two-dimensional video projection equipment, a closed three-dimensional space full of the micro particles, a linear light source capable of controlling the projection positions, and a computer for coordinating system work.
Description
Technical field
The present invention relates to the Stereoscopic Video Presentation technical field, particularly a kind of space multistory video displaying method and display system thereof.
Background technology
Along with technical development, occur some on research field and the consumption market and shown the display terminal of stereoeffect, mainly contain two major types, the first forms the display system of stereoscopic picture plane through wearing three-dimensional eyes in brain according to the parallax of human eye; It two is to see that by eyes thereby different picture forms the stereoscopic vision effect through the physical optics device.The stereo display mode that these two kinds of methods all are passive types; Be that the observer can not independently select observation visual angle and distance; And each observer is no matter be in where can only see same stereoscopic picture plane with angle; Different fully with the stereoscopic vision in the real-life, the active stereo display that therefore can address the above problem just becomes the new way of this area research.
Simultaneously; Present large-scale activity is put on display, and also more and more needs three-dimensional image to show, traditional mode can only be carried out the plane displaying or three dimensional practicality is showed; In rather dark or night; Three dimensional practicality must show that still, bandwagon effect is still not fully up to expectations by means of external light source.
Summary of the invention
Goal of the invention: technical problem to be solved by this invention is the deficiency to prior art, and space multistory video displaying method and display system thereof are provided.
In order to solve the problems of the technologies described above, the invention discloses a kind of space multistory video displaying method, may further comprise the steps:
Step 1 is divided into the 3 D video data of common frame per second the common frame per second two-dimensional video data of multilayer of different depth; Said common frame per second refers to 50～60 hertz frame per second.
Step 4 is throwed wire light from the direction vertical with projecting direction to the three dimensions that is full of molecule, controls the launching position of wire light simultaneously and cut apart preceding two-dimensional video data front-back direction to change synchronously.
The 3 D video data of common frame per second are divided into the common frame per second two-dimensional video data employing of the multilayer pan body scan method of different depth; Rely on the flat screen translational motion to construct imaging space; According to the flat screen position three-dimensional scenic that will show is cut into slices; In the process of flat screen motion, project to two dimension slicing on the flat screen of translation.
Adopt the openGL instrument to obtain two dimensional slice data among the present invention,, make that each visible space is thinly-sliced that in the threedimensional model space one is parallel to the orthographic projection plane through the far and near cutting plane of setting.
If every layer of two-dimensional video data frame per second is f, total N layer, video length is s second, and then each layer all has M frame 2-D data, and M=fs is numbered F with the Frame of each layer
Ij, wherein i representes the number of plies, from the 1...N value; I representes frame number, and from the 1...M value, then the order of the two dimensional image frame sequence after the ordering is F
11, F
21..., F
N1, F
12, F
22..., F
N2..., F
1M, F
2M..., F
NM, be the two-dimensional video of F with above-mentioned two dimensional image frame sequence configuration frame rate.
The linear light source of the said may command projected position of step 4 adopts the linear light source crowd of a plurality of fixed positions among the present invention, perhaps adopts a high frame per second two-dimensional video projector equipment to pass through output video image.
The invention also discloses a kind of display system of display space three-dimensional video-frequency, comprise the linear light source of high frame per second two-dimensional video projector equipment, the airtight three dimensions that is full of molecule, may command projected position and the calculation processing apparatus of a cover coherent system job.The arrangement that is rectangular in shape of the linear light source of high frame per second two-dimensional video projector equipment, the airtight three dimensions that is full of molecule, may command projected position, the airtight three dimensions that is full of molecule is positioned on the right angle.
The said airtight three dimensions that is full of molecule comprises free movable a large amount of small powdery particle; When amounts of particles is abundant; Particle can form similar irreflexive effect to the reflection of light, and does not influence advancing of light, can form visual lighted region.Described small powdery particle can be under the standard atmospheric pressure, and light transmittance is 85%～95% aerosolised particles crowd.
The linear light source of controlled projected position is the linear light source crowd of a plurality of fixed positions among the present invention, perhaps a high frame per second two-dimensional video projector equipment.
Said high frame per second two-dimensional video projector equipment can be with ordinary video display frame rate N frame per second output video image doubly, and wherein N representes that original 3 D video is by the number of times of tangent plane.
Among the present invention when the three dimensions yardstick is big, also need be at increase optical lens between high frame per second two-dimensional video projector equipment and the airtight three dimensions that is full of molecule to guarantee in whole display space scope, all being in good focusing state.
The principle of the invention is to utilize the high speed projection pattern that the image of different space or depth perceptions is presented at the space diverse location, formation activity 3-dimensional image, and the observer can see the surperficial and inner of image in different azimuth.
Beneficial effect: the main thought of the present invention is with the 3D solid of the actual scene mode discretization with tangent plane; Each tangent plane is represented with a two-dimentional motion video; Thereby, be implemented in of the true three-dimension entity activity graphical display of any view thus to scene through rebuild the 3D solid scene display effect of these a series of two-dimentional tangent plane formation activities at three dimensions.This method has more and can be accepted than existing other stereoscopic vision production methods; At aspects such as medical image processing, large-screen video ads, exhibition and propagandas important application prospects is arranged; More there is inestimable market business to be worth; According to applicant's rough estimates, if 1/10th in the existing two-dimensional image display is converted into three-dimensional display system of the present invention in the public place, then market prospects are huge.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done specifying further, above-mentioned and/or otherwise advantage of the present invention will become apparent.
Fig. 1 a and Fig. 1 b are system framework figure of the present invention.
Fig. 2 a and Fig. 2 b are the airtight three dimensions sketch mapes that is full of molecule involved in the present invention.
Fig. 3 a, Fig. 3 b and Fig. 3 c are display effect figure of the present invention.
Embodiment:
Shown in Fig. 1 a and Fig. 1 b; The invention discloses a kind of space multistory video displaying system, comprise high frame per second two-dimensional video projector equipment 1, be full of the airtight three dimensions 4 of molecule, the linear light source 3 of may command projected position and the computer 2 of a coherent system job.The arrangement that is rectangular in shape of the linear light source of high frame per second two-dimensional video projector equipment, the airtight three dimensions that is full of molecule, may command projected position, the airtight three dimensions that is full of molecule is positioned on the right angle.Said high frame per second two-dimensional video projector equipment and be full of between the airtight three dimensions of molecule and be provided with the optical lens 5 that is used to change the projected light focal length.The linear light source of said may command projected position can be become by the linear light source group of a plurality of fixed positions, shown in Fig. 1 a; Also can be by the high frame per second two-dimensional video of another one projector equipment through the image construction of output particular video frequency, shown in Fig. 1 b.
The invention discloses a kind of space multistory video displaying method, may further comprise the steps:
Step 1 is divided into the 3 D video data of common frame per second the common frame per second two-dimensional video data of multilayer of different depth; The frame per second of described common frame per second two-dimensional video is 50～60Hz.
Step 4 is throwed wire light from the direction vertical with projecting direction to the three dimensions that is full of molecule, controls the launching position of wire light simultaneously and cut apart preceding two-dimensional video data front-back direction to change synchronously.
The common frame per second two-dimensional video data of multilayer that in the step 13 D video data of common frame per second is divided into different depth can adopt the pan body scan method, relies on translational motion to construct imaging space.Promptly flat screen moves reciprocatingly along the axle on vertical its plane, and the amplitude of motion has determined the depth of field of imaging space.In the moment of each motion, screen is in a certain location, according to this position the three-dimensional scenic that will show is cut into slices, and in the process of screen motion, projects to two dimension slicing on the screen of translation.Concrete grammar is following:
At first carry out three-dimensional reconstruction and obtain the threedimensional model that has only surface information that constitutes by tri patch according to the relevant information of actual object.Suppose that this threedimensional model size and actual object size are linear scaling relations; If the linear scaling factor that actual object is taken advantage of is ξ (ξ＜1), establish threedimensional model x simultaneously, y; Voxel dimension on the z direction is respectively X1, Y1, Z1; For making things convenient for the pixel on the threedimensional model corresponding, guarantee X1=m, Y1=n during making with the LED planar array of m * n particle.For obtaining its slice of data, at first be specified to depth of field Z, the section number of plies n of image space according to the threedimensional model of making in advance, the coordinate of establishing foremost one deck is z
1, then the every layer of coordinate in back is z
i=z
1+ (n-1) * Z/n wherein satisfies z
i-z
1＜Z, then z
iThe position of corresponding actual screen is z
i/ ξ, as regarding section as bitmap, then the coordinate position of pixel in section is the position of this pixel on aforementioned high frame per second display plane.Then can get a z successively
i, make a section z=z
i, calculate the intersection point of itself and each tri patch of threedimensional model, then carry out matrix mapping, texture interpolation calculation, obtain the view data in the whole section at last.
Can adopt the openGL instrument to obtain two dimensional slice data in the step 1, it well realizes convergent-divergent, translation, rotation transformation, and texture interpolation, cutting.The strategy that obtains data mainly is the far and near cutting plane that needs through configuring, and makes that each visible space is thinly-sliced that in the threedimensional model space one is parallel to the orthographic projection plane.
Step 1: open openGL, it is orthographic projection that projection pattern is set, and reads the three-dimensional grid data, carries out texture mapping, and mapping shows.Adjustment viewport size is guaranteed to admit whole threedimensional model.
Step 2: call glOrtho function setup visible space.Wherein, hither plane is parallel to the XoY plane, and promptly equation is z=z
1Tangent plane, be z=z and far plane is an equation
1The tangent plane of+dz, z
1Be the position of section, dz is the thickness of section, thickness according to actual needs, desirable one or more pixels are wide.
Step 3: after every layer of section drawn, call the glReadPixels function, read after the orthographic projection pixel value of each point on the screen; Build table, preserve the pixel value of each point, and position coordinates; Certainly a lot of points are the background dots at drawing window interface; Setting the background dot pixel value in the step 1 is (255,255,255).
Step 4: blanking rationally.Look from projecting direction, point (x is gone up in the front section
1, y
1) on the lip-deep pixel of threedimensional model has appearred, corresponding points (x in the section of all back so
1, y
1) pixel should ignore, promptly from table, reject.Next as for how judging that certain puts pixel as for the threedimensional model surface, or the white background of window interface point, method is; When step 1 reads the three-dimensional grid data, if certain some pixel value is (255,255; 255) be revised as (255,255,244) so; Obviously texture is shown not have big influence, but made things convenient for judgement.
Step 5: after above-mentioned steps is accomplished, a spin matrix is acted on threedimensional model to change the visual angle, around x, y, the spin matrix of z axle (anglec of rotation Φ) is respectively:
Practical operation then can be called the glRotate function and accomplished calculating.Repeat preceding step, can obtain under another visual angle one group of three-dimensional slice data.
Step 6: in the process of extracting section, can find because the dz that gets has only several pixels wide very little, so omitted z
I-1+ dz is to z
iThis piece is interval, generally speaking, because the cutting number of plies is many, so this piece interval depth is very little, is the equivalent amount level with dz promptly, and interval interior object is along the orthographic projection of observer's direction of visual lines, and the two dimensional image that obtains is compared whole section and ignored than I.But exist or near vertical vertical with projecting direction special in also not between exclusion zone, it is bigger that the two dimensional image that has its projection to obtain is compared whole section, can not ignore, for head it off can make dz=z
2-z
1Exactly because, and combined the such programming tool of openGL, the computational speed that can guarantee when the value of dz becomes big, not increase the complexity of program and not reduce program.Just obtain the data of each two dimension slicing of three-dimensional stereo model thus.
This step can adopt any other method that three-dimensional video stream is divided into the multilayer two-dimension video data to substitute and not influence enforcement of the present invention.
Among the present invention, step 2, the method that the common frame per second two-dimensional video data of the multilayer of different depth is reassembled into high frame per second two-dimensional video data is specific as follows.
If every layer of two-dimensional video data frame per second is f, total N layer, video length is s second, then each layer all has fs frame 2-D data, and the Frame of each layer is numbered F
Ij(wherein i representes the number of plies, from the 1...N value; I representes frame number, and from the 1...M value, M=fs), then the order of the two dimensional image frame sequence after the ordering is F
11, F
21..., F
N1, F
12, F
22..., FX ..., F
1M, F
2M..., F
NM, then above-mentioned two dimensional image frame sequence can constitute the two-dimensional video that frame per second is F.
Among the present invention; Step 3; Method through projection projects high frame per second two-dimensional video data when being full of molecule three-dimensional; Adopted the high speed projector equipment of DLI company (U.S. Digital Light Innovations), this equipment can reach the video output speed of the highest per second 291～22727 frames.The frame per second of ordinary two dimensional video is 50～60Hz, therefore adopts this equipment can 3 D video be cut apart 5～400 layers.Shown in Fig. 2 b, when fan-shaped projection was exported, the image of different distance need be regulated optical lens to reach correct focusing state; And the three dimensions scene yardstick in the embodiment of the invention has reached 2 meters; Therefore increase the convergence light path at the back at optical lens, made output light in the three dimensions scene, be parallel to each other, shown in Fig. 2 a; In order to show effect of the present invention, Fig. 2 can only show with the gray scale form.
Adopt in the present embodiment and in the polymethyl methacrylate space, pour into liquid nitrogen liquid, utilize liquid nitrogen at room temperature to gasify method that the back forms the smoke-like gas particles realizes being full of the three dimensions of molecule.Concrete grammar is following:
Be that the bottom middle part of 2 meters, 1 meter, 1 meter polymethyl methacrylate body is provided with wide 10 a centimetres metallic channel at the length and width height; Both ends open, metallic channel one end slightly dark (5 centimetres), an end slightly shallow (3 centimetres); The shallow end that is omitted injects liquid nitrogen liquid; The other end reclaims the residue liquid nitrogen, and liquid nitrogen gasifies in flow process and forms white smoke shape gas, and at room temperature whole space light transmittance is about 90%; Simultaneously because proportion is a little less than air behind the liquid nitrogen gasification, therefore leaving a diameter surplus in the of about 20 in the polymethyl methacrylate top of space is that 1 centimetre aperture is with the whole space of balance internal gas pressure.
Certainly, also can adopt other modes to constitute the smoke-like environment even can adopt light transmittance to realize at 70%～90% suspension-turbid liquid or emulsion.
This step can adopt any other mode to solve the problem of large scale space focusing and not influence enforcement of the present invention.This step can adopt any other mode to constitute the three dimensions that is full of molecule and not influence enforcement of the present invention.
Among the present invention, step 4 is to throw wire light from the direction vertical with projecting direction to the three dimensions that is full of molecule, controls the launching position of wire light simultaneously and cut apart preceding two-dimensional video data front-back direction to change synchronously.The linear light source of wherein said may command projected position can be become by the linear light source group of a plurality of fixed positions, shown in Fig. 1 a; Also can be by the high frame per second two-dimensional video of another one projector equipment through the image construction of output particular video frequency, shown in Fig. 1 b.
Adopt the linear light source group of a plurality of fixed positions to become in the present embodiment, each line source is lighted in turn or is closed through computer control, thereby realizes the luminous of sequential scanning formula.
Present embodiment is implemented in the true three-dimension entity activity graphical display of any view to scene, and effect is (in order to show effect of the present invention, Fig. 3 a～Fig. 3 c can only show with the gray scale form) shown in Fig. 3 a～Fig. 3 c.In the present embodiment, flat screen is reciprocating along the axle perpendicular to it, thereby each motion moment and orthographic projection linear beam intersect a slice that forms three-dimensional scenic; The Vistavision of the amplitude decision imaging space of motion, the size in orthographic projection linear beam size decision imaging cross section, flat screen movement position and linear beam change according to former 3 D video data message simultaneously, reveal former 3D solid scene thus again.Fig. 3 a be flat screen when moving to three-dimensional centre position and linear beam intersect the slice of the three-dimensional scenic of gained; Fig. 3 b is the slice that flat screen moves to the three-dimensional scenic of three dimensions front position and the crossing gained of linear beam; Fig. 3 c is the slice that flat screen moves to the three-dimensional scenic of back-end location and the crossing gained of linear beam.
The invention provides a kind of space multistory video displaying method and display system thereof; The method and the approach of concrete this technical scheme of realization are a lot, and the above only is a preferred implementation of the present invention, should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the principle of the invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.The all available prior art of each part not clear and definite in the present embodiment realizes.
Claims (9)
1. a space multistory video displaying method is characterized in that, may further comprise the steps:
Step 1 is divided into the 3 D video data of common frame per second the common frame per second two-dimensional video data of multilayer of different depth;
Step 2 is reassembled into high frame per second two-dimensional video data with the common frame per second two-dimensional video data of the multilayer of different depth;
Step 3 projects to the three dimensions that is full of aerosolised particles with high frame per second two-dimensional video data;
Step 4 is throwed wire light from the direction vertical with projecting direction to the three dimensions that is full of molecule, controls the launching position of wire light simultaneously and cut apart preceding two-dimensional video data front-back direction to change synchronously.
2. a kind of space multistory video displaying method according to claim 1; It is characterized in that; The common frame per second two-dimensional video data of multilayer that the 3 D video data of common frame per second is divided into different depth adopts the pan body scan method, relies on the flat screen translational motion to construct imaging space, according to the flat screen position three-dimensional scenic that will show is cut into slices; In the process of flat screen motion, project to two dimension slicing on the flat screen of translation.
3. a kind of space multistory video displaying method according to claim 2; It is characterized in that; Adopt the openGL instrument to obtain two dimensional slice data,, make that each visible space is thinly-sliced that in the threedimensional model space one is parallel to the orthographic projection plane through the far and near cutting plane of setting.
4. a kind of space multistory video displaying method according to claim 1 is characterized in that, step 2 is reassembled into high frame per second two-dimensional video data with the common frame per second two-dimensional video data of the multilayer of different depth, may further comprise the steps:
If every layer of two-dimensional video data frame per second is f, total N layer, video length is s second, and then each layer all has M frame 2-D data, and M=fs is numbered F with the Frame of each layer
Ij, wherein i representes the number of plies, from the 1...N value; I representes frame number, and from the 1...M value, then the order of the two dimensional image frame sequence after the ordering is F
11, F
21..., F
N1, F
12, F
22..., F
N2..., F
1M, F
2M..., F
NM, be the two-dimensional video of F with above-mentioned two dimensional image frame sequence configuration frame rate.
5. a kind of space multistory video displaying method according to claim 1 is characterized in that, step 3 adopts the projection of DLP projector.
6. a kind of space multistory video displaying method according to claim 1; It is characterized in that; The linear light source of the said may command projected position of step 4 adopts the linear light source crowd of a plurality of fixed positions, perhaps adopts a high frame per second two-dimensional video projector equipment to pass through output video image.
7. space multistory video displaying system that realizes the described method of claim 1; It is characterized in that, comprise the linear light source of high frame per second two-dimensional video projector equipment, the airtight three dimensions that is full of molecule, may command projected position and the computer of a coherent system job;
The arrangement that is rectangular in shape of the linear light source of high frame per second two-dimensional video projector equipment, the airtight three dimensions that is full of molecule, may command projected position, the airtight three dimensions that is full of molecule is positioned on the right angle.
8. space multistory video displaying according to claim 7 system is characterized in that the linear light source of controlled projected position is the linear light source crowd of a plurality of fixed positions, perhaps a high frame per second two-dimensional video projector equipment.
9. a kind of space multistory video displaying method according to claim 1 is characterized in that, said high frame per second two-dimensional video projector equipment and be full of between the airtight three dimensions of molecule and be provided with the optical lens that is used to change the projected light focal length.
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| CN201110360364.7A CN102361497B (en) | 2011-11-15 | 2011-11-15 | Display method and display system for spatial three-dimensional video |
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| CN103327353A (en) * | 2013-05-24 | 2013-09-25 | 无锡商业职业技术学院 | Stereoscopic imaging device |
| CN104135655A (en) * | 2014-07-10 | 2014-11-05 | 南京大学 | Three-dimensional display method for use in medical photoacoustic imaging |
| CN104699235A (en) * | 2013-12-05 | 2015-06-10 | 浙江大学 | Three-dimensional space imaging interaction method and three-dimensional space imaging interaction based on ultrasonic wave |
| CN105262969A (en) * | 2015-11-20 | 2016-01-20 | 广景视睿科技（深圳）有限公司 | Combined projection method and system |
| CN106489097A (en) * | 2014-07-23 | 2017-03-08 | 索尼公司 | Three-dimensional screen structure and 3-D view generate system |
| CN108391118A (en) * | 2018-03-21 | 2018-08-10 | 惠州学院 | A kind of display system for realizing 3D rendering based on projection pattern |
| CN111435199A (en) * | 2018-12-26 | 2020-07-21 | 施轩杰 | Space display scheme |
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| CN104699235B (en) * | 2013-12-05 | 2017-12-01 | 浙江大学 | Three dimensions imaging exchange method and system based on ultrasonic wave |
| CN104699234B (en) * | 2013-12-05 | 2018-02-02 | 浙江大学 | Three dimensions imaging exchange method and system based on laser |
| CN104135655A (en) * | 2014-07-10 | 2014-11-05 | 南京大学 | Three-dimensional display method for use in medical photoacoustic imaging |
| CN106489097A (en) * | 2014-07-23 | 2017-03-08 | 索尼公司 | Three-dimensional screen structure and 3-D view generate system |
| CN105262969A (en) * | 2015-11-20 | 2016-01-20 | 广景视睿科技（深圳）有限公司 | Combined projection method and system |
| CN108391118A (en) * | 2018-03-21 | 2018-08-10 | 惠州学院 | A kind of display system for realizing 3D rendering based on projection pattern |
| CN111435199A (en) * | 2018-12-26 | 2020-07-21 | 施轩杰 | Space display scheme |
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