CN101290467B - Tangible real three-dimensional display method based on multi- projector rotating panel three-dimensional image - Google Patents
Tangible real three-dimensional display method based on multi- projector rotating panel three-dimensional image Download PDFInfo
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Abstract
The invention provides a real three-dimensional display method based on the fact that a three-dimensional image of a rotational screen of a multi-projector is touchable. The method comprises the following steps that: firstly, three-dimensional space of the three-dimensional image displayed is described by utilization of a circular cylindrical coordinate, and a series of section images in different angles along the diameter direction are analyzed; secondly, a plurality of projectors which are arranged along the circumference and rotated along with a screen project in turn, and the section images are projected to the screen to form a stereo image; thirdly, the stereo image is secondarily imaged on a given position of the space through reflectors which are arranged on the circumference of the screen so as to realize the touchable function. By utilization of the method, the stereo image can be directly touched by hands and simultaneously the contrast of the stereo image is effectively improved. The invention also provides a diametrical alternate illumination optical system of the projector used in the method, and diametrical alternate illumination can be realized by utilization of a light source.
Description
Technical field
The present invention relates to a kind of true dimension display technologies, special, relate to a kind ofly based on tangibly true 3 D displaying method of rotary screen and system, belong to the three-dimensional image display technology field.
Background technology
3-D display can provide directly perceived, natural AC mode, helps people after the various depth cueings of integrated use, obtains true, abundant, reliable sensory experience, is the inevitable development trend of display technique.Can only provide limited stereoscopic right by means of the stereoscopic 3-D display of glasses or skew ray grid, display effect is limited, and human eye assembles and regulate and can not mate when observing, and watches eyes harmful for a long time.Holographic dynamically demonstration needs the data transmission and the storage of magnanimity, and present technical merit still is not enough to realize.The body dimension display technologies can satisfy a series of requirements such as " directly visual, full angle is visual and the group looks " because of it, and become at present technology realize and display effect two aspect the technology that all has superiority.
Existing body 3-D display scheme is mainly volume silent oscillation and volume and scans type two major types.
The body of volume silent oscillation show be by suitable mode encourage or the static volume of addressing in display medium, and refresh with the speed that is higher than the human eye flicker fusion frequency, so that produce volumetric pixel, constitute the volume image that loads on truly in the three-dimensional real space thus in each space specified position.This class body shows according to the display medium difference, can be divided into following three types again.1) the volume silent oscillation based on the photolytic activity medium shows; this demonstration is usually based on two step of the double frequency process of motivation; require the photolytic activity medium to have three and increase progressively energy level; can show the two-photon absorption of two different wave lengths; send ground state-intermediate state serially in intersection, the conversion of intermediate state-excited state.Like this, the decay when excited state is returned ground state will be accompanied by the emission of optical photon.Shortcoming is the display medium that lacks suitable driving source and have abundant phototranstormation efficiency; 2) the volume silent oscillation based on passive matrix shows, utilizes multilayer liquid crystal to constitute the demonstration volume, and original three-dimensional image is resolved into a plurality of two-dimensional section images, explains corresponding two-dimensional image information with a plurality of liquid crystal layers respectively then.Because the corresponding overlong time of liquid crystal, display device are extremely complicated, operability is not high; 3) the volume silent oscillation based on active matrix shows, this scheme utilizes light-emitting component to constitute uniform, isotropic cubical array in physical space, each element is corresponding to a self luminous physical size unit, can be by addressing optionally and the organizator pixel.Shortcoming is that the size of cubical array is directly related with the scope of image space, size of element own and interval determination the fine and smooth degree of shown image, be electrically connected complexity, the volumetric pixel density refractory is to satisfy application requirements.
The body that volume scans type shows it is shape, mode of motion and position according to screen, the three-dimensional body section is resolved to two dimensional image, when screen motion, at assigned address the image of resolving is presented on the screen, utilize human eye vision to persist and reconstruct 3-D view.At present open report have following four kinds: 1) based on the real three-dimensional display system of plane screen straight reciprocating motion, the rectilinear motion by projection screen reconstructs 3-D view; 2) real three-dimensional display system that rotates based on two-dimentional LED screen; 3) increase the real three-dimensional display system of frame frequency DLP projector based on the Plane of rotation screen; 4) increase the real three-dimensional display system of frame frequency DLP projector based on the spiral screen; 5) based on the real three-dimensional display system of multi-projector rotating panel.
Based on the straight-line true three-dimensional display apparatus of plane screen owing to be difficult to produce the high frequency mechanical drive system of the practical yardstick that reaches big, System Operation mechanism has limited the mobile range of target screen, causes this true 3-D display scheme that moves based on the plane screen linear reciprocation to promote.
There is following shortcoming in body three-dimensional display apparatus based on the rotation of two-dimentional LED screen: 1) image forming appts has brought difficulty to data transmission on rotary screen; 2) size of LED luminous die is bigger, and the resolution of screen display can not be very high, is suitable for large scale and shows; 3) image gray-scale level is few, and color is not abundant; 4) moment of inertia is big.
True three-dimensional display apparatus display effect in present true three-dimensional display apparatus of increasing frame frequency DLP projector based on the Plane of rotation screen is best, but also there is following several shortcoming in it simultaneously: 1) even adopted soft, the hardware facility of representing the contemporary science and technology development level, also only can realize body resolution Ф 768 * 198, body refresh rate 30Hz, 8 kinds of colors, color of image was not abundant when full screen showed; 2) need image is rotated and treatment for correcting, operand is huge; 3) the part projection optical system is rotated with screen, and mechanical noise is big; 4) be subjected to the restriction of DMD frame frequency, the space of improving angular resolution is little.
Based on spiral screen increase the real three-dimensional display system of frame frequency DLP projector except since use single high frame frequency DLP projector have based on the Plane of rotation screen increase frame frequency DLP projector true three-dimensional display apparatus the 1st) and the 4th) the bar problem, also have because the use spiral shields three shortcomings that cause: 1) 3-D view has the hollow phenomenon; 2) 3-D view section algorithm complexity; 3) little with single projector field depth.
Real three-dimensional display system based on multi-projector rotating panel, the patent of having applied for as the applicant, application number 200710107887.4, adopt multi-projector multi-angle projection mode, by screen rotation, in three dimensions, construct the 3-D view of object by the cross-sectional image of a series of corresponding angles of projector's projection.This system compares above-mentioned four kinds of real three-dimensional display systems, has following advantage: the mutual restriction bottleneck of 1) having broken through resolution, GTG and frame frequency; 2) LCD that projector's available rates is cheap or LCOS do light engine; 3) adopt stroboscopic illumination, to the response time requirement reduction of projector; 4) adopt the data parallel transmission technology, make refresh rate and the resolution space that has greatly improved.
Above-mentioned real three-dimensional display system all is based on the motion screen; true three-dimansioual display is for reducing air resistance and protecting personal safety generally will add a translucent cover; make that the observer can't close-ups and touch the real tri-dimension image, also just can't realize the low coverage interaction between observer and the image.Rotation screen is generally diffuse scattering screen, and each body image unit can be luminous to a spherical space, but the light that also all shone on the screen of screen reflexes in observer's the eye simultaneously, thereby has reduced the contrast of image.
Summary of the invention
The present invention proposes a kind of true 3 D displaying method of high-contrast of can near viewing and can touch, and by optical imaging device true 3-dimensional image is suspended in the space, and and the observer between without any obstacle, hand can directly touch stereopsis.Optical imaging device blocks the extraneous light of major part, has reduced the veiling glare that enters in the display system, has improved the contrast of stereopsis effectively.
Using cylindrical-coordinate system to carry out three-dimensional space the three-dimensional body that is shown describes, resolves to a series of cross-sectional images that are different angles along diametric(al); Use projects screen along a plurality of projectors of circumference with cross-sectional image, when screen turns to the optical axis position of vertical projection machine, projector with the image projection of a corresponding angle to screen, screen is pivoted by driven by motor, projection is successively rotated with screen by projector, scans the formation stereopsis at three dimensions.This stereopsis via the mirror reflects that is arranged on screen periphery after, secondary imaging persists effect in the space assigned address by human eye vision, promptly as seen is suspended in the stereopsis of the three-dimensional body of described space assigned address.Wherein catoptron also is a protective cover except that having the optical imagery effect simultaneously, both can protect personal safety, but air-isolation reduces air resistance again.Extraneous veiling glare must just can shine through the light hole of catoptron on the screen, because the area of light hole is less, can blocks most of veiling glare and enter, and improves a lot with respect to the contrast of hemispheric transparent shield stereopsis.
In order to solve the needs of said method, the invention allows for a kind of diameter that is used for described true 3 D displaying method projector and replace lamp optical system projection lighting.This illuminator is used for the illumination to projector, and is coaxial with screen, comprised light source, first lens combination, second lens combination and spherical reflector, and wherein first and second lens combination are fixed in the rotating shaft about the light source symmetry, rotate with screen synch around the shaft; Spherical reflector and first, second lens combination common optical axis, and with the incident end face that passes light beam about the light source symmetry; Pass light beam and spherical reflector and arrange along circle alternate, pass the axis of light beam and the optical axis coincidence of spherical reflector and also cross the center of circle, light source is on the center of circle, and mechanical rotating shaft is also on the center of circle.In a certain angle first lens combination source imaging is being passed on the light beam, second lens combination with source imaging on spherical reflector, spherical reflector reflects light along former road, passing on the light beam through second lens combination, light source, the first lens combination secondary imaging again, the luminous energy of light source back radiation is also projected in the biography light beam, thereby but improve light efficiency.When the illuminating lens group forwarded another angle to, to passing in the light beam, first lens combination to spherical reflector, was passing source imaging on the light beam with the light source secondary imaging through its reflection second lens combination again with the light source direct imaging.When lens combination was rotated continuously, diameter is illumination alternately.To pass light beam and spherical mirror is closely arranged, and reduce the area of dead space, the projection light energy that utilizes lens combination as much as possible can be realized alternately illumination of diameter with a light source.Preferably, a plurality of projectors can shared this illuminator to save the space.
Description of drawings
Fig. 1 is based on the real three-dimensional display system synoptic diagram (catoptron is not shown) of multi-projector rotating panel.
Catoptron and screen mutual alignment concern synoptic diagram in Fig. 2 tangible real three-dimensional display system of the present invention.
Fig. 3 diameter of the present invention replaces the lamp optical system synoptic diagram.
Projector's location drawing in the product introduction device of the true 3 D displaying method of the described use the present invention of Fig. 4 embodiment of the invention.
Fig. 5 embodiment of the invention is described adoptable from the floating three-dimensional imaging light path synoptic diagram of axle suspension.
The coaxial suspension three-dimensional imaging of the described adoptable panorama of Fig. 6 embodiment of the invention light path.
The described adoptable one-sided coaxial suspension three-dimensional imaging light path of Fig. 7 embodiment of the invention.
Among the figure, the 1-Rotation screen 2-3-of projector cog belt 4-motor 5-passes the light beam 6-first lens combination 7-light source 8-second lens combination 9-spherical reflector 10-light hole 11-stereopsis 12-first catoptron 13-second catoptron 14-catoptron 15-axis of symmetry 16-half-reflecting half mirror
Specific embodiment
Application in product introduction is further described to the method for the invention below in conjunction with accompanying drawing.
The product exhibition platform that utilizes the method for the invention to make up in conjunction with lighting device of the present invention, can show products such as mobile phone, automobile intuitively, utilize the three-dimensional software of making, for example the CAD software of 3DMAX and so on carries out three-dimensional modeling to product, the two dimensional image of a series of multi-angles that acquisition is resolved into three-dimensional model in cylindrical coordinate; As shown in Figure 1, use a plurality of projectors multi-angle with the two dimensional image synchronized projection of corresponding angle on screen, thereby reconstruct the 3-D view similar to real-world object.Rotary screen is unidirectional diffuse reflection screen or two-way dispersion screen, is rotated by driven by motor.The light that light source sends replaces lamp optical system through as shown in Figure 3 diameter and (writes image in the projector in advance by passing the projector that light beam projects corresponding angle, be in waiting status), projector is in circumferential directions, as shown in Figure 4, wherein 0 °-180 ° is the projector at odd number angle, 180 °-360 ° is the projector at even number angle, the projection of institute of projector be the cross-sectional image of corresponding angle three-dimensional body.When screen rotated, odd even projector is alternately projection on diameter, and screen rotates 180 °, and the equal projection of all projectors is once finished a 3-D view refresh cycle, reconstructs the true 3-D view of 360 ° of complete range of observation.
Above-mentioned true 3-D view via the mirror reflects that is arranged on screen periphery after, secondary imaging is in the space assigned address.Preferably, the catoptron that is arranged on screen periphery can adopt coaxial suspension three-dimensional imaging light path as shown in Figure 2.First catoptron and second catoptron are hemispherical distribution, lay respectively at the above and below of screen.The first catoptron center arrangement has light hole, and image through second mirror reflects can only be seen via light hole in the residing position of overview person.This light path will be scanned the stereopsis of formation through the first catoptron imaging, secondary imaging was in the space assigned address after imaging was passed the light hole of first catoptron by second catoptron again, persist effect by human eye vision, promptly as seen be suspended in the stereopsis of the three-dimensional body of described space assigned address.Because blocking of first catoptron, the direct stereopsis that is received by second catoptron and directly can only in the very little angular range of light hole, seeing by the stereopsis of light hole outgoing, the image of secondary imaging in the space specified location can only be seen by place, overview person present position, avoided seeing simultaneously a plurality of images.First catoptron also is a protective cover except that having the optical imagery effect simultaneously, can block most of veiling glare and enter, and improves the contrast of image.
Except adopting coaxial suspension three-dimensional imaging light path shown in Figure 2, can also adopt following several imaging optical path.
1. from the floating three-dimensional imaging light path of axle suspension
As shown in Figure 5, catoptron will depart from the 3 D stereoscopic image that the Rotation screen of axis of symmetry generates and be imaged on opposite side.
2. the coaxial suspension three-dimensional imaging of panorama light path
As shown in Figure 6, the 3 D stereoscopic image that Rotation screen generates becomes a virtual image through the half-reflection and half-transmission level crossing, become a real image through spherical reflector again, 3 D stereo picture on the Rotation screen and suspension space image and can be observed around 360 ° of scopes of axis of symmetry on same axis of symmetry.
3. one-sided coaxial suspension three-dimensional imaging light path
As shown in Figure 7, the 3 D stereo picture on the Rotation screen becomes a virtual image through the half-reflection and half-transmission level crossing earlier, becomes a real image through spherical reflector again, and 3 D stereo picture on the Rotation screen and suspension space image are on same axis of symmetry.
Image processing apparatus in the product demonstration system adopts PC, finishes three-dimensional modeling by PC, three-dimensional model is resolved into the two dimensional image of a series of multi-angles again in cylindrical coordinate, then image is transferred to projector and carries out 3-D display.Because product introduction does not need in real time, so can adopt earlier a series of images data transmission of handling well in the PC is shown to behind the buffer memory of each projector again, can transmit some information to the data processing unit of each projector in real time by PC during demonstration, for example need some characters that superpose or simple image information etc., finish the stack of character picture etc. by data processing unit.If need to show in real time 3-D view, because there is very high requirement very three-dimensional the demonstration in real time to the image data transmission rate, the separate unit PC can not satisfy the needs of data transmission, should develop the computer card of PCI-E interface, on the basis of the data transmission rate that improves the separate unit PC, use the transmission of multiple pc machine parallel data.In order to guarantee the multiple pc machine in transmission basic synchronization during data, be provided with wherein one as main control computer, finish synchro control by the integrated circuit board of PCI-E to all PCs.
It will be understood by those skilled in the art that the method for the invention is not limited to the statement of the foregoing description, carry out three-dimensionalreconstruction after thing two-dimensional section image can also adopt CT scan as obtaining to be shown; The position of projector can be determined according to the profile that is shown thing, be not limited to the circumference mode; Screen can be rectangle, planar graph shape such as fan-shaped, or curved surface graphics shape such as spiral camber; Do not deviating under the principle and scope of the present invention situation, contingent improvement, combination, part combination and correction according to designing needs and other factors are all in the protection domain of claim of the present invention or its equivalents.
Claims (4)
1. one kind based on the tangibly true 3 D displaying method of multi-projector rotating panel 3-dimensional image, may further comprise the steps:
(1) uses cylindrical-coordinate system to carry out three-dimensional space the three-dimensional body that is shown and describe, resolve to a series of cross-sectional images along the diametric(al) different angles;
(2) use is rotated projection successively along many projectors of circumference with screen, cross-sectional image is projected screen form stereopsis;
(3) at screen periphery two groups of hemispherical reflective mirrors are set, lay respectively at the above and below of Rotation screen, reflective mirror center arrangement above screen has light hole, above-mentioned stereopsis through two groups of reflective mirror secondary imagings in the space assigned address, this secondary image can only be seen via light hole in the residing position of observer, realizes that 3-dimensional image is tangible.
2. true 3 D displaying method as claimed in claim 1 is characterized in that described cross-sectional image adopts three-dimensional modeling to obtain.
3. true 3 D displaying method as claimed in claim 1 is characterized in that described screen is unidirectional diffuse reflection screen or two-way dispersion screen, is pivoted by driven by motor.
4. one kind is used for replacing illuminator based on the diameter of the tangibly true 3 D displaying method of multi-projector rotating panel 3-dimensional image, it is characterized in that illuminator and screen are coaxial, comprise light source, first lens combination, second lens combination and spherical reflector, wherein first and second lens combination are about the light source symmetry, be fixed in the rotating shaft, rotate with screen synch around the shaft; Spherical reflector and first, second lens combination common optical axis, and with the incident end face that passes light beam about the light source symmetry; Pass light beam and spherical reflector and arrange along circle alternate, pass the axis of light beam and the optical axis coincidence of spherical reflector and also cross the center of circle, light source is on the center of circle, and mechanical rotating shaft is also on the center of circle; When first and second lens combination are rotated continuously, first lens combination is passing source imaging on the light beam, second lens combination with source imaging on spherical reflector, spherical reflector reflects light along former road, passing on the light beam through second lens combination, light source, the first lens combination secondary imaging again, the luminous energy of light source back radiation is also projected in the biography light beam, realize alternately illumination of diameter.
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| CN200810114457XA CN101290467B (en) | 2008-06-05 | 2008-06-05 | Tangible real three-dimensional display method based on multi- projector rotating panel three-dimensional image |
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| WO2020137174A1 (en) * | 2018-12-28 | 2020-07-02 | 株式会社Ｊｖｃケンウッド | Projector system |
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| CN110262377B (en) * | 2019-06-28 | 2021-08-27 | 佳木斯大学 | Computer projection and projection integrated device and use method thereof |
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| CN111338015B (en) * | 2020-04-17 | 2023-05-02 | 荆门市探梦科技有限公司 | Reflective geometric holographic film based on two-dimensional characteristics and preparation method and application thereof |
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