CN104299548B - Correcting system for naked eye multi-vision true three-dimensional display system and realizing method - Google Patents
Correcting system for naked eye multi-vision true three-dimensional display system and realizing method Download PDFInfo
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Abstract
The invention discloses a correcting system for a naked eye multi-vision true three-dimensional display system and a realizing method. The correcting system comprises an image collecting device, a fixing device and a processing device. The image collecting device is located on the inner side of a screen of the naked eye multi-vision true three-dimensional display system and used for collecting projected images of all projection units in a projection matrix in a reverse collecting mode. The fixing device is connected with the image collecting device and used for fixing the image collecting device to the inner side of the screen. The processing device is used for receiving the projected images collected by the image collecting device, carrying out correcting pretreatment, calculating and correcting the projected images of all the projection units frame by frame according to a projection conversion coefficient matrix, so that the corrected images coincide on the same rectangular screen. The correcting system automatically collects the projected original images of all the projection units from the reverse side in the reverse direction and corrects the images, the position of the image collecting device does not need to be adjusted again during correction each time, use is convenient, and the correcting system is easy to commercialize.
Description
Technical field
The present invention relates to true three dimensional display field, particularly to a kind of based on regarding true three dimensional display the bore hole of projected array more
The correction system of system and implementation method.
Background technology
True three-dimension display technlolgies can provide object or the scene with three-dimensional perception for multiple spectators simultaneously.Regarding bore hole more
True three-dimension display technlolgies as an important development field of true three-dimension display technlolgies, by domestic and international research worker as emphasis
Studied.Provide the three-dimensional perception feature prompting meeting human eye nature observation habit depending on true three-dimension display technlolgies more than bore hole
(Cue), the display mode based on projected array simplifies mechanical part and display screen in display unit in system simultaneously
Design, increased the engineering feasibility of display complex texture and large scale true color three-dimensional content, makes display system closer to mesh
Front commercial flat-panel screens.
Specifically, based on the basic conception (in figure as shown in Figure 1 regarding true three-dimension display technlolgies the bore hole of projected array more
Illustrated in case of three projecting cells)：Assume the image three observation places observed be respectively 100,101,
102, the screen 103 with anisotropy holographic film receives the three width figures going out from three diverse location projection unit projects respectively
Picture 104,105,106, this every width of three width image is successively respectively by A1, B1, C1, A2, B2, C2, tri- picture strip groups of A3, B3, C3
Become.Because anisotropy holographic film surface has special micro structure so that the light that different directions projection comes passes through holography
Can propagate each along different directions after film.So ideally, 104,105,106 this three width projected image warp can be made
Cross every width in three width images 100,101,102 of restructuring after screen 103 successively respectively by A1, B2, C3, A2, B3, C1, A3,
B1, C2 form, if so getting out A1, B1, C1 in advance, A2, B2, C2, and the content of this three width projected image of A3, B3, C3, make
A1, B2, the C3 that must observe, A2, B3, C1, this three width of A3, B1, C2 restructuring after figure can reflect exactly be rendered object or
During the scene that person's scene should be observed in this position, you can produce in observer's brain and observe that object or scene are three-dimensional
The perception of information.
Under practical situation, due to the projecting cell present position difference to screen 103 projected image, even if the three width in figure hearts
Point overlaps with 103, and its actual projection images 107,108,109 assumes irregular quadrilateral, all cannot be with 103 rectangular area weight
Close, and also cannot mutually coincide from each other, as shown in Fig. 2 left side, so cannot meet the figure regarding true three dimensional display bore hole more
As formation condition.
It is thus desirable to introduce correction system so as to the image that is projected out become the rectangle 104 that can mutually coincide, 105,
106, and it is all matched with the rectangular area of screen 103 respectively, shown on the right of Fig. 2.
In general, correction system, using the external image collecting device outside the system that is free on, is arranged on spectators and is stood
Position is corrected to after the collection of projecting cell original image, and correction every time needs to adjust the position of image collecting device, such as Fig. 3
Shown.And the marketization requirement of the fast development with true three-dimension display technlolgies and the conversion of true three-dimension display technlolgies theoretical result,
In the urgent need to a kind of compact correcting system being applied to more than bore hole depending on real three-dimensional display system and being easily integrated.
Content of the invention
The technical problem to be solved in the present invention be exactly overcoming the correction system of prior art to be free on bore hole to regard more very three-dimensional
Outside display system, and each correction needs to adjust the problem of the position of image collecting device, provides a kind of built-in integration
Correction system and implementation method, to meet market-oriented demand.
The correction system of real three-dimensional display system, in order to solve the above problems, is provided a kind of present invention bore hole of offer more, including：
Image collecting device, fixing device and processing meanss, wherein,
Described image harvester is located inside the screen regarding real three-dimensional display system bore hole more, for being gathered by reverse
Mode acquired projections array in each projecting cell projected image；
Described fixing device is connected with described image harvester, for being fixed on described image harvester in screen
Side；
Described processing meanss are connected with described image harvester and projected array, for receiving described image harvester
The projected image collecting, after being corrected pretreatment, calculates the projective transformation coefficient matrix of each projecting cell, according to projection
The projected image of the projecting cell to each for the transform coefficient matrix is corrected frame by frame, makes the picture registration after correction many in bore hole
Depending on the screen of real three-dimensional display system.
Preferably, regard real three-dimensional display system when the described bore hole using the little sky of close-coupled relying on reflecting mirror to fold light path more
Between layout when, described image harvester is arranged at the screen lower edge regarding real three-dimensional display system bore hole more, towards position
In regarding the reflecting mirror on rear side of real three-dimensional display system bore hole, passing through mirror projection on screen for acquired projections array more
Projected image.
Preferably, when more than described bore hole depending on real three-dimensional display system using do not turn down light path layout when, described image is adopted
Acquisition means are arranged on projected array side, towards screen.
Preferably, when more than described bore hole depending on real three-dimensional display system using do not turn down light path layout when, described process dress
Put and be further used for, when carrying out pretreatment, the projected image collecting is carried out with left and right upset process.
Preferably, regard real three-dimensional display system when the described bore hole using the little sky of close-coupled relying on reflecting mirror to fold light path more
Between layout when, described processing meanss are further used for, when carrying out pretreatment, the projected image collecting is carried out spinning upside down and
Left and right upset is processed.
Preferably, described processing meanss are further used for, and when carrying out pretreatment, carry out Nogata to the projected image collecting
Figure equalization or collection multiple image carry out brightness homogenization process again.
In order to solve the above problems, the present invention also provides a kind of reality of the correction system regarding real three-dimensional display system bore hole more
Existing method, including：
In image collecting device acquired projections array by way of reverse collection, the projected image of each projecting cell, sends out
Deliver to processing meanss；
The projected image receiving is corrected pretreatment by described processing meanss, then calculates the throwing of each projecting cell
Shadow transform coefficient matrix, is corrected frame by frame according to the projected image of the projecting cell to each for the projective transformation coefficient matrix, is made
Picture registration after correction on the screen regarding real three-dimensional display system bore hole more.
Preferably, when more than described bore hole depending on real three-dimensional display system using do not turn down light path layout when, described process dress
Put the step that the projected image receiving is corrected pretreatment to include：
The projected image collecting is carried out with left and right upset process.
Preferably, regard real three-dimensional display system when the described bore hole using the little sky of close-coupled relying on reflecting mirror to fold light path more
Between layout when, the step that the projected image receiving is corrected pretreatment is included by described processing meanss：
The projected image collecting is spun upside down and left and right upset is processed.
Preferably, the step that the projected image receiving is corrected pretreatment is also included by described processing meanss：
The projected image collecting is carried out with histogram equalization or collection multiple image carries out brightness homogenization process again.
External correction system is moved into internal system fixed position by the present invention, from each projection of the reverse automatic data collection in the back side
The original image that cell projection goes out is corrected, and each correction does not need to adjust image collector seated position again, easy to use,
It is easy to commercialization.
Brief description
Fig. 1 is a kind of typical case's naked eye three-dimensional displaying principle schematic diagram being provided image by projected array；
Fig. 2 is to regard true three-dimensional correction schematic diagram based on the bore hole of projected array more；
Regarding the external discrete correction system of real three-dimensional display system the bore hole based on projected array of Fig. 3 prior art more
Schematic diagram；
Fig. 4 be the embodiment of the present invention one the bore hole based on projected array more regard real three-dimensional display system built-in integration
Correction system schematic；
Fig. 5 be the embodiment of the present invention two the bore hole based on projected array more regard real three-dimensional display system built-in integration
Correction system schematic；
Fig. 6 is correction angle point data to schematic diagram；
Fig. 7 is that correction pixels reorientate schematic diagram.
Specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.It should be noted that not conflicting
In the case of, the embodiment in the application and the feature in embodiment can mutual combination in any.
The image that projector in projecting cell goes out is as what light path increased and extended, if therefore projection lens is put down
Face is not parallel with projection screen plane, then projected image can be distorted, and becomes irregular rectangle by rectangle.It is thus desirable to increasing
Correction system is corrected one by one to the image of projecting cell.Correction system need to know each projection unit projects goes out without
Correction chart picture and screen actual positional relationship, then projection image correction is kissed completely to it with screen place rectangle for standard
Close.
Generally comprise an image collecting device, the fixing device of still image harvester in correction system and process dress
Put, image acquisition device projected image, processing meanss identify four angle points of screen according to the projected image collecting, and
Judge its coordinate in projected image, you can exist using the coordinate of four corners in image coordinate system and four corners of screen
Irregular tetragon projected image is transformed to the projection screen of rule by the coordinate in image coordinate system by projective transformation algorithm
In curtain rectangle.Because four corners of screen position in space is fixed, so different projecting cell is carried out according to above method
Correction, after the correction finally giving, projected image is not only coincide with screen place rectangle, also mutually identical from each other, that is, reach
Effect on the right of Fig. 2.
As shown in figure 3, general pattern harvester is placed in system when gathering the projected image for recognition screen angle point
The dead ahead of screen, when being so corrected, convenient adjustment, gathers image.But when needing collection every time, need to reset tune
Whole correction system；And it is impossible to be integrated into one outside correction system is free on whole system.
Regard the built-in integration correction system of real three-dimensional display system more a kind of present invention bore hole of proposition, set in internal system
Put photographic head, rationally utilize the limited space of internal system, on the premise of not interfering projecting light path, with shooting from inside to outside
Path obtains the quadrilateral area substantially overlapping on the display screen that each projector goes out, and corrects with projected array and calculates
The irregular rectangle that each projection unit projects goes out is corrected to the regular square that can all accurately overlap on the display screen by method
Shape, to solve to regard the Railway Project in real three-dimensional display system aforementioned bore hole more.
High-ranking officers' positive system of the present invention is placed in inside whole system, in the case of not blocking internal projected array light path, from
Internal reversely collection image, as shown in Figure 4 and Figure 5, the correction system of the embodiment of the present invention includes：Image collecting device 200, solid
Determine device 205 and processing meanss (not shown), wherein, image collecting device 200 be located at bore hole more regard true three dimensional display system
Inside the screen 103 of system, the projected image of each projecting cell in acquired projections array by way of reverse collection；Fixing dress
Put 205 to be connected with image collecting device 200, image collecting device 200 is fixed on inside screen 103；Processing meanss and image
Harvester 200 is connected with projected array 202, receives the projected image that image collecting device 200 collects, is corrected pre- place
After reason, calculate the projective transformation coefficient matrix of each projecting cell, according to the projecting cell to each for the projective transformation coefficient matrix
Projected image corrected frame by frame, make the picture registration after correction in same rectangular screen 103.
Wherein, image collecting device 200 refers generally to small-sized image pickup head, is connected with processing meanss by USB or netting twine.Process
Device can be computer or other processing platforms.
Embodiment one
As shown in figure 4, system regards display effect higher naked eye three-dimensional to reach more, fold light using relying on reflecting mirror
The little space layout of close-coupled on road, is regarding increase reflecting mirror 203 in real three-dimensional display system 201 more, is giving in Fig. 4 bore hole
The typical placement location of reflecting mirror 203 1.
The internal narrow space of system 201 can limit the putting position of built-in correction system it is difficult to make image
Harvester 200 is directly directed at screen 103 and is corrected the collection of image and does not block the imaging optical path of projected array 202.Cause
This can consider to fold collection path using reflecting mirror 203, so easily image collecting device can also be fixed on system
201 edge, does not produce to the image path of projected array 202 and blocks.It is many that Fig. 4 gives a kind of typically integrated bore hole
Fixed form depending on correction system built-in in real three-dimensional display system：Image collecting device 200 is fixed on bore hole more and regards true three
At the screen lower edge of dimension display system, fixing device 205 can be attached by screw and system 201 shell, and handle
Image collecting device 200, towards the reflecting mirror 203 positioned at system 201 rear side, passes through reflecting mirror for acquired projections array 202
203 project to the projected image on 103, and image collecting device 200 and fixing device 205 will not be to projected array 202 simultaneously
Imaging optical path produces and blocks.
Embodiment two
As shown in figure 5, depending on real three-dimensional display system using the layout not turning down light path more than bore hole, system takies larger sky
Between, make projected array 202 carry out Projection Display in the case of not turning down light path, now the fixing device 205 in correction system
Harvester 200 can be placed in the side of projected array 202, towards screen 103, projection be collected with the distance obtaining enough
Correction chart picture on screen 103.
Under both acquisition modes, the collection direction of correction system is outwards inversely to be gathered inside system 201,
Also have passed through mirror image it is therefore desirable to pretreatment is corrected to original image in compact layout hypograph, according still further to before simultaneously
Aligning step be corrected.
Specifically, regard the implementation method of the correction system of real three-dimensional display system more bore hole, comprise the steps：
The projection of each projecting cell in image collecting device 200 acquired projections array 202 by way of reverse collection
Image, sends to processing meanss；
The projected image receiving is corrected pretreatment by described processing meanss, then calculates the throwing of each projecting cell
Shadow transform coefficient matrix, is corrected frame by frame according to the projected image of the projecting cell to each for the projective transformation coefficient matrix, is made
Picture registration after correction on the screen regarding real three-dimensional display system bore hole more.
The correcting algorithm that we are adopted needs to know non-corrected image and the screen reality that each projection unit projects goes out
Border position relationship, here using four angle points of screen and four angle points of image border as the reference point group comparing.As Fig. 6
Shown, on the basis of coordinate system XY of projected image, then four, not calibrated projected image edge angle point II, i=1,2,3,
4 coordinateIt is respectively according to counter clockwise direction sequence：
Wherein M, N are respectively the horizontal and vertical resolution of image, in advance set in advance according to image resolution ratio；And
Four angle point O at screen 103 edge that image collecting device 200 recognizesi, i=1,2,3,4 in projected image coordinate system
CoordinateIt is respectively：
Wherein each coordinate points is obtained by image collecting device identification.Although screen 103 is fixing, due to projection array
In row 202, each projecting cell position is different, and the position of projected image coordinate system is different, so for different projecting cells, shielding
Four, the edge angular coordinate of curtain 103Also different.It is thus desirable to entering to all projecting cells
Row calibration one by one, is obtained n group in the case of having n projecting cellData；And for projection
For image, in the case of resolution identical, the coordinate of four angle points in image border is all identical.So adopt through image
The collection of acquisition means, after the identification of processing meanss, one is obtained n to data pair, and each pair data is to including under image coordinate system
Four edge angle points of projected image and the coordinate of four angle points of screen edge.Using projective transformation formula：
In above formula, w is proportionality coefficient, can eliminate this parameter, then the number by each projecting cell by matrixing algorithm
According to rightWithSubstitution can obtain 8 and can be treated in equation with the equation of simultaneous
Seek projective transformation coefficient matrix McoefficientThe number of middle unknown parameter is also 8, you can obtain n group projecting cell in this approach
Projective transformation coefficient matrix Mcoefficient.After obtaining coefficient matrix, using its in each projection unit projects image each
Location of pixels is reorientated：
Wherein M, N are still the horizontal and vertical resolution of image.In projected image, each pixel is with the four of display screen 103
After reorientating on the basis of individual edge angle point, just the rectangle matching with display screen 103 is become by irregular tetragon, its
In change in location before and after each pixel correction as shown in Figure 7：In projected image, all pixels present in the case of not calibrated
As in Fig. 7 the left side irregular quadrilateral distribution, corrected after rearrange present as in Fig. 7 the right and screen 103 match
Distributed rectangular, meeting the image formation condition regarding true three dimensional display bore hole more.
When being corrected according to the built-in correction design shown in Fig. 4 and Fig. 5, need to the correct image collecting
Pretreatment.The step of pretreatment mainly includes the following steps；
Image Reversal：Built-in integration correction system design, its mirror image inversely photographing and Fig. 3 shown in Fig. 5
The image directly shooting is compared, and image have passed through reversed left to right；And the built-in integration correction system under compact layout shown in Fig. 4
System, image also have passed through in the case of reversed left to right and turns upside down.In order to not affect the position of identification point, need first to correction
Image carries out the upset of up and down or left and right, is processed according still further to aligning step above；
Brightness of image adjusts：Built-in correction system design shown in Fig. 4 and Fig. 5, its shoot mirror image brightness and
The image that Fig. 3 directly shoots is compared can be variant, can affect the knowledge to screen 103 identification point position in the correction chart picture collecting
Not it is therefore desirable to image carries out histogram equalization or collection multiple image carries out brightness homogenization process again to gathering, it
Processed according still further to aligning step above afterwards.
Above-described embodiment illustrates being applied to bore hole of present invention statement more and regards built-in the one of real three-dimensional display system
Bodyization corrects system design, and relatively general external discrete corrects system, and the present invention cannot be with the system integration, every time for it
The weak point such as need to put manually, adjust, high-ranking officers' positive system is placed in inside whole system, is not blocking internal projected array light
In the case of road, reversely gather image from internal, and to the correction correct image pretreatment collecting in such cases, make
It also can be corrected by general aligning step.Correct system, the built-in school of present invention design compared to separating external
Positive system more conforms to commonly use at present and regards real three-dimensional display system close-coupled integrated design principle bore hole more.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of bore hole, regard the correction system of real three-dimensional display system more, including：Image collecting device, fixing device and process dress
Put it is characterised in that
Described image harvester is located inside the screen regarding real three-dimensional display system bore hole more, for the side by reverse collection
The projected image of each projecting cell in formula acquired projections array；
Described fixing device is connected with described image harvester, for being fixed on described image harvester inside screen；
Described processing meanss are connected with described image harvester and projected array, for receiving the collection of described image harvester
The projected image arriving, after being corrected pretreatment, calculates the projective transformation coefficient matrix of each projecting cell, according to projective transformation
Coefficient matrix is corrected frame by frame to the projected image of each projecting cell, makes the picture registration after correction regard true three the bore hole more
On the screen of dimension display system；
When regarding real three-dimensional display system described bore hole using the little space layout of close-coupled relying on reflecting mirror to fold light path more, institute
State image collecting device and be arranged at the screen lower edge regarding real three-dimensional display system bore hole more, true towards regarding positioned at bore hole more
Reflecting mirror on rear side of three-dimensional display system, passes through described mirror projection to described screen for collection in described projected array
Image on Shi Suoshu reflecting mirror.
2. correction system as claimed in claim 1 it is characterised in that
When more than described bore hole depending on real three-dimensional display system using do not turn down light path layout when, described image harvester is arranged on
Projected array side, towards screen.
3. correction system as claimed in claim 1 it is characterised in that
When more than described bore hole depending on real three-dimensional display system using do not turn down light path layout when, described processing meanss are carrying out pre- place
During reason, the projected image collecting is carried out with left and right upset process.
4. correction system as claimed in claim 1 it is characterised in that
When regarding real three-dimensional display system described bore hole using the little space layout of close-coupled relying on reflecting mirror to fold light path more, institute
State processing meanss when carrying out pretreatment, the projected image collecting is spun upside down and left and right upset is processed.
5. the correction system as described in any one in Claims 1 to 4 it is characterised in that
Described processing meanss, when carrying out pretreatment, carry out histogram equalization or gather several figures to the projected image collecting
As carrying out brightness homogenization process again.
6. a kind of bore hole, regard the implementation method of the correction system of real three-dimensional display system more, including：
The projected image of each projecting cell in image collecting device acquired projections array by way of reverse collection, send to
Processing meanss；
The projected image receiving is corrected pretreatment by described processing meanss, and the projection then calculating each projecting cell becomes
Change coefficient matrix, according to projective transformation coefficient matrix, the projected image of each projecting cell is corrected frame by frame, after making correction
Picture registration bore hole more regard real three-dimensional display system screen on；
Described image harvester is arranged at the screen lower edge regarding real three-dimensional display system bore hole more, towards positioned at bore hole
Regard the reflecting mirrors on rear side of real three-dimensional display system more, pass through described mirror projection to described for collection in described projected array
Image on described reflecting mirror when on screen.
7. implementation method as claimed in claim 6 it is characterised in that
When more than described bore hole depending on real three-dimensional display system using do not turn down light path layout when, described processing meanss will receive
The step that projected image is corrected pretreatment includes：
The projected image collecting is carried out with left and right upset process.
8. implementation method as claimed in claim 6 it is characterised in that
When regarding real three-dimensional display system described bore hole using the little space layout of close-coupled relying on reflecting mirror to fold light path more, institute
State processing meanss to include the step that the projected image receiving is corrected pretreatment：
The projected image collecting is spun upside down and left and right upset is processed.
9. implementation method as claimed in claim 7 or 8 it is characterised in that
The step that the projected image receiving is corrected pretreatment is also included by described processing meanss：
The projected image collecting is carried out with histogram equalization or collection multiple image carries out brightness homogenization process again.
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| CN103905808A (en) * | 2012-12-27 | 2014-07-02 | 北京三星通信技术研究有限公司 | Device and method used for three-dimension display and interaction. |
| CN103260041A (en) * | 2013-04-25 | 2013-08-21 | 南京航空航天大学 | Multi-viewpoint automatic light-splitting three-dimensional display device of scene |
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| US6219099B1 (en) * | 1998-09-23 | 2001-04-17 | Honeywell International Inc. | Method and apparatus for calibrating a display using an array of cameras |
| US6618076B1 (en) * | 1999-12-23 | 2003-09-09 | Justsystem Corporation | Method and apparatus for calibrating projector-camera system |
| CN1949166A (en) * | 2006-11-09 | 2007-04-18 | 上海大学 | Free multi visul point polyprojecting 3D displaying system and method |
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