CN104299548A - 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 3-D display field, particularly a kind of bore hole based on projected array looks corrective system and the implementation method of real three-dimensional display system more.
Background technology
True three-dimension display technlolgies can simultaneously for multiple spectators provide the object or scene with three-dimensional perception.Bore hole looks the important development field of true three-dimension display technlolgies as true three-dimension display technlolgies more, is studied as emphasis by domestic and international researchist.Bore hole is looked true three-dimension display technlolgies more and is provided three-dimensional perception feature prompting (Cue) meeting human eye nature observation habit, display mode simultaneously based on projected array simplifies the design of mechanical part and display screen in display unit in system, add the engineering feasibility of display complex texture and large scale true color three-dimensional content, make display system closer to flat-panel screens commercial at present.
Specifically, bore hole based on projected array is looked the key concept of true three-dimension display technlolgies more and (is described for the situation of three projecting cells in figure) as shown in Figure 1: suppose that the image that three observation places are observed is respectively 100,101,102, the screen 103 with anisotropy holographic film receives the three width images 104,105,106 gone out from three diverse location projection unit projects respectively, the every width of this three width image is successively respectively by A1, B1, C1, A2, B2, C2, A3, B3, C3 tri-picture strip compositions.Because anisotropy holographic film surface has special microstructure, understand after light therethrough holographic film different directions project come and propagate along different directions separately.So ideally, can 104 be made, 105, the three width images 100 that 106 these three width projected images are recombinated after screen 103, 101, every width in 102 is successively respectively by A1, B2, C3, A2, B3, C1, A3, B1, C2 forms, if get out A1 so in advance, B1, C1, A2, B2, C2, A3, B3, the content of this three width projected image of C3, make the A1 observed, B2, C3, A2, B3, C1, A3, B1, after the restructuring of this three width of C2, figure can reflect exactly and be played up object or scene when the scene that this position should be observed, the perception observing object or scene three-dimensional information can be produced in observer's brain.
Under actual conditions, because the projecting cell present position to screen 103 projected image is different, even if three width figure central points overlap with 103, its actual projection images 107,108,109 presents irregular quadrilateral, all cannot overlap with the rectangular area of 103, and mutually between also cannot overlap mutually, as shown in Fig. 2 left side, the Computer image genration condition that bore hole looks true 3-D display more cannot be met like this.
Therefore need to introduce corrective system, the image making it project out becomes the rectangle 104,105,106 that can overlap mutually, and it all matches, as shown on the right of Fig. 2 with the rectangular area of screen 103 respectively.
Generally speaking, corrective system adopts the external image collecting device be free on outside system, is arranged on spectators institute station location and corrects after the collection of projecting cell original image, and each correction needs the position adjusting image collecting device, as shown in Figure 3.And along with the fast development of true three-dimension display technlolgies and the market-oriented requirement of true three-dimension display technlolgies theoretical result conversion, look real three-dimensional display system more in the urgent need to a kind of bore hole that is applicable to and be easy to integrated compact correcting system.
Summary of the invention
The technical problem to be solved in the present invention is exactly that the corrective system that overcomes prior art is free on bore hole and looks outside real three-dimensional display system more, and each problem correcting the position needing adjustment image collecting device, there is provided a kind of corrective system and implementation method of built-in integration, with satisfied market-oriented demand.
In order to solve the problem, the invention provides the corrective system that a kind of bore hole looks real three-dimensional display system more, comprising: image collecting device, stationary installation and treating apparatus, wherein,
Described image collector is looked inside the screen of real three-dimensional display system setting in bore hole more, for the projected image by each projecting cell in the mode acquired projections array of reverse collection;
Described stationary installation is connected with described image collecting device, for being fixed on inside screen by described image collecting device;
Described treating apparatus is connected with projected array with described image collecting device, for receiving the projected image that described image acquisition device arrives, after carrying out correction pre-service, calculate the projective transformation matrix of coefficients of each projecting cell, correct frame by frame according to the projected image of projective transformation matrix of coefficients to each projecting cell, the picture registration after correction is looked on the screen of real three-dimensional display system in bore hole more.
Preferably, when described bore hole look more real three-dimensional display system adopt rely on the close-coupled of catoptron folded optical path little space layout time, described image collecting device is arranged on the screen lower edge place that bore hole looks real three-dimensional display system more, look catoptron on rear side of real three-dimensional display system towards being positioned at bore hole more, for acquired projections array by mirror projection to the projected image on screen.
Preferably, when described bore hole look more real three-dimensional display system adopt do not turn down the layout of light path time, described image collecting device is arranged on projected array side, towards screen.
Preferably, when described bore hole look more real three-dimensional display system adopt do not turn down the layout of light path time, described treating apparatus is further used for, when carrying out pre-service, to the projected image collected carry out left and right upset process.
Preferably, when described bore hole look more real three-dimensional display system adopt rely on the close-coupled of catoptron folded optical path little space layout time, described treating apparatus is further used for, and when carrying out pre-service, spins upside down and left and right upset process to the projected image collected.
Preferably, described treating apparatus is further used for, and when carrying out pre-service, carries out histogram equalization or gather multiple image carrying out brightness homogenization process again to the projected image collected.
In order to solve the problem, the present invention also provides a kind of bore hole to look the implementation method of the corrective system of real three-dimensional display system more, comprising:
Image collecting device, by the projected image of each projecting cell in the mode acquired projections array of reverse collection, is sent to treating apparatus;
The projected image received is carried out correction pre-service by described treating apparatus, then the projective transformation matrix of coefficients of each projecting cell is calculated, correct frame by frame according to the projected image of projective transformation matrix of coefficients to each projecting cell, the picture registration after correction is looked on the screen of real three-dimensional display system in bore hole more.
Preferably, when described bore hole look more real three-dimensional display system adopt do not turn down the layout of light path time, the projected image received is carried out correcting pretreated step and comprises by described treating apparatus:
Left and right upset process is carried out to the projected image collected.
Preferably, when described bore hole look more real three-dimensional display system adopt rely on the close-coupled of catoptron folded optical path little space layout time, the projected image received is carried out correcting pretreated step and comprises by described treating apparatus:
The projected image collected is spun upside down and left and right upset process.
Preferably, the projected image received is carried out correcting pretreated step and also comprises by described treating apparatus:
Carry out histogram equalization to the projected image collected or gather multiple image carrying out brightness homogenization process again.
External corrective system is moved into internal system fixed position by the present invention, and the original image that each projection unit projects of reverse automatic collection goes out from the back side corrects, and each correction does not need to adjust image collector seated position again, easy to use, is easy to commercialization.
Accompanying drawing explanation
Fig. 1 is the one typical case naked eye three-dimensional displaying principle schematic diagram being provided image by projected array;
Fig. 2 looks true three-dimensional correction schematic diagram based on the bore hole of projected array more;
The bore hole based on projected array of Fig. 3 prior art looks external the discrete corrective system schematic diagram of real three-dimensional display system more;
Fig. 4 is the built-in integrated corrective system schematic diagram that the bore hole based on projected array of the embodiment of the present invention one looks real three-dimensional display system more;
Fig. 5 is the built-in integrated corrective system schematic diagram that the bore hole based on projected array of the embodiment of the present invention two looks real three-dimensional display system more;
Fig. 6 is that correction angle point data is to schematic diagram;
Fig. 7 is that correction pixels reorientates schematic diagram.
Embodiment
Hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
The image that projector in projecting cell goes out along with light path increase and expand, if therefore projection lens plane and projection screen plane not parallel, then projected image can distort, and becomes irregular rectangle by rectangle.Therefore need to increase the image of corrective system to projecting cell to correct one by one.The non-corrected image that corrective system needs to know that each projection unit projects goes out and screen actual positional relationship, then with screen place rectangle for projection image correction fits like a glove to it by standard.
An image collecting device, the stationary installation of still image harvester and treating apparatus is generally comprised in corrective system, image acquisition device projected image, treating apparatus identifies screen four angle points according to the projected image collected, and judge its coordinate in projected image, coordinate and screen four coordinates of corner in image coordinate system of four corners in image coordinate system can be utilized, by projective transformation algorithm, irregular quadrilateral projected image is transformed in the projection screen rectangle of rule.Because position in space, screen four corners is fixed, so different projecting cell corrects according to method above, after the correction finally obtained, projected image not only coincide with screen place rectangle, also mutually coincide, namely reach the effect on the right of Fig. 2 mutually.
As shown in Figure 3, when the collection of general pattern harvester is used for the projected image of recognition screen angle point, be placed in the dead ahead of system screen, carry out the convenient adjustment of timing like this, gather image.But when needing to gather, need to reset adjustment corrective system at every turn; And corrective system is free on outside whole system, cannot be integrated by integrated one-tenth.
The present invention proposes the built-in integrated corrective system that a kind of bore hole looks real three-dimensional display system more, in internal system, camera is set, the space that Appropriate application internal system is limited, under the prerequisite of not interfering projecting light path, the quadrilateral area roughly overlapped on the display screen that each projector goes out is obtained with shooting path from inside to outside, the irregular rectangle using projected array correcting algorithm to be gone out by each projection unit projects is corrected to the regular rectangular shape that can all accurately overlap on the display screen, look Railway Project in real three-dimensional display system to solve aforementioned bore hole more.
Corrective system is placed in whole system inside by the present invention, when not blocking inner projected array light path, from inner counter to collection image, as shown in Figure 4 and Figure 5, the corrective system of the embodiment of the present invention comprises: image collecting device 200, stationary installation 205 and treating apparatus (not shown), wherein, image collecting device 200 is positioned at bore hole and looks inside the screen 103 of real three-dimensional display system more, by the projected image of each projecting cell in the mode acquired projections array of reverse collection; Stationary installation 205 is connected with image collecting device 200, is fixed on by image collecting device 200 inside screen 103; Treating apparatus is connected with projected array 202 with image collecting device 200, receive the projected image that image collecting device 200 collects, after carrying out correction pre-service, calculate the projective transformation matrix of coefficients of each projecting cell, correct frame by frame according to the projected image of projective transformation matrix of coefficients to each projecting cell, 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 treating apparatus by USB or netting twine.Treating apparatus can be computer or other processing platforms.
Embodiment one
As shown in Figure 4, system looks display effect to reach higher naked eye three-dimensional more, adopt the little space layout of close-coupled relying on catoptron folded optical path, namely look in real three-dimensional display system 201 to increase in catoptron 203, Fig. 4 giving catoptron 203 1 typical placement locations more in bore hole.
The inner narrow space of system 201 can limit the putting position of built-in corrective system, is generally difficult to make image collecting device 200 directly to aim at screen 103 and carries out the collection of correcting image and do not block the imaging optical path of projected array 202.Therefore can consider to utilize the folding collection path of catoptron 203, so also easily image collecting device can be fixed on the edge of system 201, the image path of projected array 202 not produced and block.Fig. 4 gives the fixed form that a kind of typically integrated bore hole looks built-in corrective system in real three-dimensional display system more: image collecting device 200 is fixed on the screen lower edge place that bore hole looks real three-dimensional display system more, stationary installation 205 can be connected with system 201 shell by screw, and image collecting device 200 towards the catoptron 203 be positioned on rear side of system 201, to be projected to the projected image on 103 by catoptron 203 for acquired projections array 202, image collecting device 200 and stationary installation 205 can not produce the imaging optical path of projected array 202 and block simultaneously.
Embodiment two
As shown in Figure 5, bore hole is looked real three-dimensional display system more and is adopted the layout not turning down light path, system takies larger space, projected array 202 is made to carry out Projection Display when not turning down light path, harvester 200 can be placed in the side of projected array 202 by the stationary installation 205 now in corrective system, towards screen 103, collect to obtain enough distances the correcting image projected on screen 103.
Under these two kinds of acquisition modes, the collection direction of corrective system outwards carries out reverse collection from system 201 inside, also have passed through mirror image at compact layout hypograph simultaneously, therefore need to carry out correction pre-service to original image, then correct according to aligning step before.
Particularly, bore hole looks the implementation method of the corrective system of real three-dimensional display system more, comprises the steps:
Image collecting device 200, by the projected image of each projecting cell in the mode acquired projections array 202 of reverse collection, is sent to treating apparatus;
The projected image received is carried out correction pre-service by described treating apparatus, then the projective transformation matrix of coefficients of each projecting cell is calculated, correct frame by frame according to the projected image of projective transformation matrix of coefficients to each projecting cell, the picture registration after correction is looked on the screen of real three-dimensional display system in bore hole more.
The non-corrected image that the correcting algorithm that we adopt needs to know that each projection unit projects goes out and screen actual positional relationship, adopt four angle points of four of screen angle points and image border as the reference point group compared here.As shown in Figure 6, with the coordinate system XY of projected image for benchmark, four, so not calibrated projected image edge angle point I
i, i=1,2, the coordinate of 3,4
be respectively according to counterclockwise sequence:
Wherein M, N are respectively the horizontal and vertical resolution of image, preset according to image resolution ratio for prior; And four angle point O at screen 103 edge that image collecting device 200 recognizes
i, i=1,2,3,4 coordinates in projected image coordinate system
be respectively:
Wherein each coordinate points is obtained by image collecting device identification.Although screen 103 is fixing, because projecting cell position each in projected array 202 is different, the position of projected image coordinate system is different, so for different projecting cell, and four, the edge angular coordinate of screen 103
also different.Therefore needing to carry out calibration one by one to all projecting cells, obtaining n group altogether when there being n projecting cell
data; And for projected image, be all identical at the coordinate of identical four angle points in situation hypograph edge of resolution.Like this through the collection of image collecting device, after the identification for the treatment of apparatus, obtain altogether n to data pair, the often pair of data are to the coordinate being included in projected image four edge angle points and screen edge four angle points under image coordinate system.Utilize projective transformation formula:
In above formula, w is scale-up factor, can this parameter of cancellation by matrixing algorithm, then by the data pair of each projecting cell
with
substitution can obtain 8 can the equation of simultaneous, projective transformation matrix of coefficients M to be asked in equation
coefficientthe number of middle unknown parameter is also 8, can obtain the projective transformation matrix of coefficients M of n group projecting cell in this approach
coefficient.After obtaining matrix of coefficients, it is utilized to reorientate each location of pixels in each projection unit projects image:
Wherein M, N are still the horizontal and vertical resolution of image.On projected image each pixel with four of display screen 103 edge angle points for after base weight new definition, the rectangle matched with display screen 103 is just become by irregular quadrilateral, change in location wherein before and after each pixel correction is as shown in Figure 7: in projected image, all pixels present irregular quadrilateral distribution in the left side in as Fig. 7 in not calibrated situation, after overcorrect, rearrange the rectangular distribution presented as the right and screen 103 in Fig. 7 match, meet the Computer image genration condition that bore hole looks true 3-D display more.
Carrying out timing according to the built-in correction design shown in Fig. 4 and Fig. 5, needing the correct image pre-service to collecting.Pretreated step mainly comprises the following steps;
Image Reversal: the built-in integrated corrective system design shown in Fig. 5, its reverse mirror image photographed is compared with the image that Fig. 3 directly takes, and image have passed through reversed left to right; And the built-in integrated corrective system under compact layout shown in Fig. 4, image also have passed through and turns upside down when reversed left to right.In order to not affect the position of identification point, needing the upset first correcting image being carried out to up and down or left and right, then processing according to aligning step above;
Brightness of image adjusts: the built-in corrective system design shown in Fig. 4 and Fig. 5, the mirror image brightness of its shooting is compared with the image that Fig. 3 directly takes can be variant, the identification to screen 103 identification point position in the correcting image collected can be affected, therefore needing to carry out histogram equalization or gather multiple image carrying out brightness homogenization process again to gathering image, processing according to aligning step above more afterwards.
What above-described embodiment illustrated the present invention's statement is applicable to the built-in integrated corrective system design that bore hole looks real three-dimensional display system more, relatively general external discrete corrective system, the present invention is directed to its cannot with the system integration, the weak points such as each needs are manually put, adjustment, corrective system is placed in whole system inside, when not blocking inner projected array light path, from inner counter to collection image, and correction pre-service is carried out to the correcting image collected in such cases, make it also correct by general aligning step.Compared to separation external corrective system, the built-in corrective system of the present invention's design more meets conventional bore hole at present and looks real three-dimensional display system close-coupled integrated design principle more.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. bore hole looks a corrective system for real three-dimensional display system more, comprising: image collecting device, stationary installation and treating apparatus, is characterized in that,
Described image collector is looked inside the screen of real three-dimensional display system setting in bore hole more, for the projected image by each projecting cell in the mode acquired projections array of reverse collection;
Described stationary installation is connected with described image collecting device, for being fixed on inside screen by described image collecting device;
Described treating apparatus is connected with projected array with described image collecting device, for receiving the projected image that described image acquisition device arrives, after carrying out correction pre-service, calculate the projective transformation matrix of coefficients of each projecting cell, correct frame by frame according to the projected image of projective transformation matrix of coefficients to each projecting cell, the picture registration after correction is looked on the screen of real three-dimensional display system in bore hole more.
2. corrective system as claimed in claim 1, is characterized in that,
When described bore hole look more real three-dimensional display system adopt rely on the close-coupled of catoptron folded optical path little space layout time, described image collecting device is arranged on the screen lower edge place that bore hole looks real three-dimensional display system more, look catoptron on rear side of real three-dimensional display system towards being positioned at bore hole more, for acquired projections array by mirror projection to the projected image on screen.
3. corrective system as claimed in claim 1, is characterized in that,
When described bore hole look more real three-dimensional display system adopt do not turn down the layout of light path time, described image collecting device is arranged on projected array side, towards screen.
4. corrective system as claimed in claim 1, is characterized in that,
When described bore hole look more real three-dimensional display system adopt do not turn down the layout of light path time, described treating apparatus when carrying out pre-service, to the projected image collected carry out left and right upset process.
5. corrective system as claimed in claim 1, is characterized in that,
When described bore hole look more real three-dimensional display system adopt rely on the close-coupled of catoptron folded optical path little space layout time, described treating apparatus, when carrying out pre-service, spins upside down the projected image collected and left and right upset process.
6., as the corrective system in Claims 1 to 5 as described in any one, it is characterized in that,
Described treating apparatus, when carrying out pre-service, carries out histogram equalization to the projected image collected or gathers multiple image carrying out brightness homogenization process again.
7. bore hole looks an implementation method for the corrective system of real three-dimensional display system more, comprising:
Image collecting device, by the projected image of each projecting cell in the mode acquired projections array of reverse collection, is sent to treating apparatus;
The projected image received is carried out correction pre-service by described treating apparatus, then the projective transformation matrix of coefficients of each projecting cell is calculated, correct frame by frame according to the projected image of projective transformation matrix of coefficients to each projecting cell, the picture registration after correction is looked on the screen of real three-dimensional display system in bore hole more.
8. implementation method as claimed in claim 7, is characterized in that,
When described bore hole look more real three-dimensional display system adopt do not turn down the layout of light path time, the projected image received is carried out correcting pretreated step and comprises by described treating apparatus:
Left and right upset process is carried out to the projected image collected.
9. implementation method as claimed in claim 7, is characterized in that,
When described bore hole look more real three-dimensional display system adopt rely on the close-coupled of catoptron folded optical path little space layout time, the projected image received is carried out correcting pretreated step and comprises by described treating apparatus:
The projected image collected is spun upside down and left and right upset process.
10. implementation method as claimed in claim 8 or 9, is characterized in that,
The projected image received is carried out correcting pretreated step and also comprises by described treating apparatus:
Carry out histogram equalization to the projected image collected or gather multiple image carrying out brightness homogenization process again.
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