CN107092096A - A kind of bore hole 3D ground sand table shows system and method - Google Patents

A kind of bore hole 3D ground sand table shows system and method Download PDF

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Publication number
CN107092096A
CN107092096A CN201610986211.6A CN201610986211A CN107092096A CN 107092096 A CN107092096 A CN 107092096A CN 201610986211 A CN201610986211 A CN 201610986211A CN 107092096 A CN107092096 A CN 107092096A
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China
Prior art keywords
lens
display
lens array
array
optics
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Pending
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CN201610986211.6A
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Chinese (zh)
Inventor
桑新柱
高鑫
张婉璐
于迅博
颜玢玢
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Beijing University of Posts and Telecommunications
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Beijing University of Posts and Telecommunications
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Priority to CN201610986211.6A priority Critical patent/CN107092096A/en
Publication of CN107092096A publication Critical patent/CN107092096A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B30/00Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/27Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays

Abstract

The present invention provides a kind of bore hole 3D ground sand table and shows system and method, and the display system includes:Display device, lens array and the optics with orientation diffusion function;Wherein, the display device is used to show the 3D rendering array collected from different perspectives;The lens array is used to the pattern matrix in display device being imaged;The optics is used to the lens array imaging being reconstructed into the light field observed in the range of 360 degree.The bore hole 3D ground sand table of the present invention shows that system and display methods can make observer watch correct and complete 3-d reproduction scene from all angles.

Description

A kind of bore hole 3D ground sand table shows system and method
Technical field
The present invention relates to 3D display technology fields, system and side are shown more particularly, to a kind of bore hole 3D ground sand table Method.
Background technology
Bore hole 3D Display Techniques can allow observer without any supplementary means, it is possible to see real three-dimensional vertical Body scene.The technology is applied in the sand table of ground, the research contributed in terms of urban planning, military simulation, engineering construction. Bore hole 3D ground sand table shows the principle that system utilizes light field to reproduce, and the information that will gather the different directions of image is modulated Afterwards, in space in reconstructed image each object light field, the depth information of image is provided for observer.This display system must Big visual angle and full parallax need be provided, allow beholder to observe the 3-D view of reconstruct in the range of 360 degree.
Existing bore hole 3D shows that system all only provides horizontal parallax mostly, and the reconstruction object that observer finally observes is all only There is the 3D information of horizontal direction, it is impossible to watched in the range of 360 degree.In addition, existing bore hole 3D shows that system can not be carried For with the actual physical depth that is consistent of reality, observer must stand the distance set in range display just it is observed that correct 3D effect, and the existing display system angle of visual field is small and equipment is complicated, and observer slightly moves, and can not just observe correct 3-d reproduction scene.
The content of the invention
The present invention provides a kind of bore hole 3D ground sand table for overcoming above mentioned problem or solving the above problems at least in part Display system, the display system includes:Display device, lens array and the optics with orientation diffusion function;Wherein,
The display device is used to show the 3D rendering array collected from different perspectives;
The lens array is used to the pattern matrix in display device being imaged;
The optics is used to the lens array imaging being reconstructed into the light field observed in the range of 360 degree.
Preferably, the distance of optics and lens array is l2, the l2Meet equation below:
l2=l1*a
Wherein, l1For the distance of object to lens array principal plane, α is the lateral magnification of lens.
Preferably, lens array includes N group lens units, wherein, N values correspond to the width number of image in pattern matrix.
Preferably, every piece image in each lens unit correspondence described image array.
Preferably, lens unit is multiple-piece compound lens.
Preferably, the lens centre of every lens is located in same optical axis in multiple-piece compound lens.
Preferably, the focal length of lens unit is f, and the f meets equation below:
Tan ω=b/l1
l2=l1*a
Wherein, l1For object to the distance of lens array principal plane, l2For the optics to lens array principal plane Distance, b is that 1/2, ω of the size of every piece image in pattern matrix is that 1/2, α of the angle of visual field is the lateral magnification of lens.
According to an aspect of the present invention, a kind of bore hole 3D ground sand table display methods is additionally provided, methods described includes:
The pattern matrix of three-dimensional scenic based on collection, the Complete three-dimensional of system reconfiguration sand table is shown using 3D ground sand table Image.
Preferably, in gatherer process, encoded including the use of the directional information that encoding software emits beam three-dimensional scenic Into pattern matrix.
Preferably, 3D ground sand table shows that system includes:Display device, lens array and the light with scattering function Learn device;Wherein,
The display device is used to show the 3D rendering array collected from different perspectives;
The lens array is used to the pattern matrix in display device being imaged;
The optics is used to the lens array imaging being reconstructed into 3D rendering.
Preferably, the optics is used to the lens array imaging being reconstructed into and observed in the range of 360 degree Light field.
Compared with prior art, bore hole 3D ground sand table of the invention shows that system and method allows observer from different angles Correct image can be watched in the range of i.e. 360 degree of degree, display simple system of the invention, the angle of visual field is big, is observer There is provided complete image information.
Brief description of the drawings
Fig. 1 is the structural representation that system is shown according to the bore hole 3D ground sand table of a preferred embodiment of the invention;
Fig. 2 is according to the Parameter Map that single image single-element lens is directed in a preferred embodiment of the invention;
Fig. 3 is the structural representation of the three-chip type compound lens according to used in a preferred embodiment of the invention;
Fig. 4 is the schematic device of the three-chip type compound lens according to used in a preferred embodiment of the invention;
Fig. 5 is the IMAQ schematic diagram according to a preferred embodiment of the invention;
Fig. 6 is the image reproducing schematic diagram according to a preferred embodiment of the invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is described in further detail.Implement below Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
The bore hole 3D ground sand table of the present invention shows that system includes display device, lens array and with orientation diffusion function Optics;Wherein,
Display device is used to show the 3D rendering array collected from different perspectives;
Lens array is used to the pattern matrix in display device being imaged;
Optics is used to the lens array imaging being reconstructed into the light field observed in the range of 360 degree.
Wherein, display device is the carrier of imaging content, and the pattern matrix collected is shown in it.In prior art In, the display device that can image content may be incorporated in technical scheme.The present invention more preferably uses liquid crystal Display screen.
Lens array is used to be imaged pattern matrix.In a preferred embodiment, for LCDs Pattern be imaged.In a preferred embodiment, lens array is compound lens array so that imaging is clearer, depending on Rink corner is more easy to regulation.It is highly preferred that lens array is arranged in the top of LCDs.
Optics with orientation diffusion function is often referred to have orientation diffusion function to incident light, and with modulating wave Preceding effect.In the prior art, it can realize that all optics of above-mentioned functions are used equally in technical scheme. Hologram functional screen is more preferably used in the present invention, it is a kind of that there is the optical thin film for orienting diffusion to incident light, with modulation The effect of wavefront.
In the present invention have orientation diffusion function optics play the role of two it is main, one is the light to injection Carry out wavefront modification, completion optical information;Two be, in junction, the position focused on to be provided for human eye as reconstruction of three-dimensional images.
In a preferred embodiment of the invention, lens array is arranged in the optics with orientation diffusion function Approximately the same plane.It is highly preferred that optics is arranged in the top of lens array.
In a preferred embodiment of the invention, as shown in figure 1, the bore hole 3D ground sand table of the present invention shows system bag Include LCDs, combination microlens array, hologram functional screen.Original three-dimensional scenic is carried out using harvester such as camera Collection, obtains pattern matrix, the pattern matrix is shown on LCD screen, then by the combination microlens array of top Imaging.Hologram functional screen is placed in the position of lens array image plane, it is adjusted to image by the picture obtained by lens array System.Wherein, combination microlens array specifically described herein is compound lens array.
In a preferred embodiment of the invention, the distance of optics and lens array is l2, the l2Meet as follows Formula:
l2=l1*a
Wherein, l1For the distance of object to lens array principal plane, α is the lateral magnification of lens.
In a preferred embodiment of the invention, lens array includes N group lens units, and N values correspond to described image The width number of image in array.
It is covered with below every piece image in each lens unit correspondence described image array, each group of lens unit The reconstruct of each point in piece image in pattern matrix, three-dimensional scenic, is required in every piece image corresponding pixel Point contributes for it.
In a preferred embodiment of the invention, system of the invention is applied in the sand table of ground, with viewing TV screen Curtain is different, and the system needs to be placed on the ground, and is easy to observer to be observed in surrounding, in ground sand table display field, this hair Bright display system needs to provide the bigger angle of visual field.The angle of visual field is usually more than 45 degree in the prior art, preferably 70 degree with On.In order to further improve the angle of visual field of this display system, each lens unit is multiple-piece assembled unit lens.
More preferably it is that the focal length of the lens unit is f, and the f meets equation below:
Tan ω=b/l1
l2=l1*a
Wherein, l1For object to the distance of lens array principal plane, l2For the optics to lens array principal plane Distance, b is that 1/2, ω of the size of every piece image in pattern matrix is that 1/2, α of the angle of visual field is the lateral magnification of lens.
In a preferred embodiment of the present invention, for example, a diameter of 9mm of used single-element lens, primitive image Size be 11mm*11mm.Exemplified by showing that the angle of visual field of system reaches 70 °, to meet this requirement, according to Fig. 2, calculate Required parameter.Wherein, b=5.5mm, ω=35, by tan ω=b/l1, obtain object distance l1=7.85mm.The horizontal magnification of lens Rate is 12, so image distance l2=12l1=94.2mm.Calculated further according to lens imaging formula, the focal length f of single-element lens is 7.5mm。
In a preferred embodiment of the present invention, multiple-piece combination is included in the compound lens array used in the present invention Lens, can reach the image quality higher compared with simple lens, and the angle of visual field is bigger.Wherein, the lens centre of multi-disc single-element lens is located at In same optical axis.Wherein multiple-piece include more than 2, more preferably 3 and more than, exemplified by three, referring to Fig. 3.According to above-mentioned Parameter value, the parameter of compound lens is that focal length is 7.5mm, and lateral magnification is 12, and the angle of visual field is 70 °, the disc of confusion of 0.7 visual field For 1.34mm.
As shown in figure 4, in a preferred embodiment of the present invention, three simple lenses in three-chip type compound lens are placed In plastic barrel, separated between each two lens with plastic ferrule, the spacing parameter of the height of plastic ferrule between lens is determined It is fixed.Wherein, the spacing parameter between lens is set according to the parameter of compound lens.Middle simple lens is firstly placed on plastic ferrule The inside, then place it in lens barrel, so that the lens centre is located in same optical axis with other lenses.Other multiple-pieces The assembling of compound lens is referring to the above method.
In another aspect of the present invention, bore hole 3D ground sand table display methods of the invention, including, three based on collection The pattern matrix of scene is tieed up, the complete three dimensional image of system reconfiguration sand table is shown using 3D ground sand table.
In a preferred embodiment of the present invention, a kind of bore hole 3D ground sand table of the invention shows system, including: Display device, lens array and the optics with orientation diffusion function;Wherein, display device is used to show from different perspectives The 3D rendering array collected;The lens array is used to the pattern matrix in display device being imaged;The optics device Part is used to the lens array imaging being reconstructed into the light field observed in the range of 360 degree.
Wherein, the pattern matrix collected is shown to display device, by lens array imaging, then by above-mentioned optics The modulation and reconstruct of device, reduce the light field of three-dimensional scenic.
In gatherer process, the directional information that three-dimensional scenic emits beam is encoded to including the use of computer code software In pattern matrix.Image Coding software known in the prior art could be used in the present invention.
In gatherer process, in order to preferably reduce the light field of three-dimensional scenic, position and required reproduction according to the observation The physical message of three-dimensional scenic is acquired to scene, obtains the image of the scene different directions, constitutes pattern matrix.
In a preferred embodiment of the present invention, IMAQ of the invention is completed by computer software, with Fig. 5 Exemplified by, in the place apart from three-dimensional scenic certain distance, arrange and four camera conducts are only depicted in multiple cameras, schematic diagram Explanation.In shooting process, each camera photographs the three-dimensional scenic of different angles, obtains a corresponding image, composition Pattern matrix.
By taking the point A in three-dimensional scenic as an example, imaging analysis are carried out to it.The optical center point O for choosing No. 0 camera is coordinate Origin, camera label n=0, the camera label above it takes n=1 successively, and 2,3..., camera label below is followed successively by n =-1, -2, -3....If | AB |=a, the length of side size of the image collected is p, then relative in the image of n-th of camera collection The A answerednPoint ordinate be
Analyze, fixed positions of the point A in the three-dimensional scenic, and collected by different cameras more than In image, point A position is changed.Therefore, the directional information that 3-D view emits beam is coded in pattern matrix, Pattern matrix stores the depth information of three-dimensional scenic.
The present invention one preferred embodiment in, Image Reconstruction part of the invention is illustrated by taking Fig. 6 as an example. By taking the picture point A' of reconstruct as an example, the pixel of each in pattern matrix AnThe light sent is by the corresponding lens list in its top After tuple, by the modulation of hologram functional screen, picture point A' is finally reconstructed into.Similarly, the whole 3-D view that can be reconstructed.
The bore hole 3D ground sand table of the present invention shows the 3D that system and method can allow 360 degree of observer to watch reconstruct Compound lens array used in scene, the system improves image quality, increases the angle of visual field.Use the display of the present invention System does not require that observer must stand the distance ability set in range display it is observed that correct 3D effect figure, observer It is observed that correct 3-d reproduction scene in the range of 360 degree.
Present document relates to technical term it is as follows:
Light field:The light field of some three-dimensional scenic is reconstructed by certain mode, if the light field of reconstruct and former light field one Cause, then the image reconstructed is identical with original image
The angle of visual field:It is able to observe that the angular range of correct reconstructed image
Compound lens:The lens group being made up of multi-disc simple lens
Image plane:Plane of the imaging object after lens where imaging
Object distance:Distance of the object to lens object space principal plane
Image distance:Distance as arriving lens image space principal plane
Lateral magnification:Image height and the high ratio of thing
Disc of confusion:Object point is after lens imaging, it is impossible to pool a point, but a speckle.
Finally, although be described in conjunction with the accompanying embodiments of the present invention, but it is all the spirit and principles in the present invention it It is interior, any modification, equivalent substitution and improvements that those skilled in the art are made etc., should be included in protection scope of the present invention it It is interior.

Claims (10)

1. a kind of bore hole 3D ground sand table shows system, it is characterised in that the system includes:Display device, lens array and Optics with orientation diffusion function;Wherein,
The display device is used to show the 3D rendering array collected from different perspectives;
The lens array is used to the pattern matrix in display device being imaged;
The optics is used to the lens array imaging being reconstructed into the light field observed in the range of 360 degree.
2. display system according to claim 1, it is characterised in that the distance of the optics and the lens array For l2, the l2Meet equation below:
l2=l1*a
Wherein, l1For the distance of object to lens array principal plane, α is the lateral magnification of lens.
3. display system according to claim 1, it is characterised in that the lens array includes N group lens units, its In, N values correspond to the width number of image in described image array.
4. display system according to claim 3, it is characterised in that each lens unit correspondence described image battle array Every piece image in row.
5. display system according to claim 4, it is characterised in that the lens unit is multiple-piece compound lens.
6. display system according to claim 5, it is characterised in that per blade unit lens in the multiple-piece compound lens Lens centre be located at same optical axis on.
7. the display system according to any one of claim 3-6, it is characterised in that the focal length of the lens unit is f, The f meets equation below:
<mrow> <mfrac> <mn>1</mn> <msub> <mi>l</mi> <mn>1</mn> </msub> </mfrac> <mo>+</mo> <mfrac> <mn>1</mn> <msub> <mi>l</mi> <mn>2</mn> </msub> </mfrac> <mo>=</mo> <mfrac> <mn>1</mn> <mi>f</mi> </mfrac> </mrow>
Tan ω=b/l1
l2=l1*a
Wherein, l1For object to the distance of lens array principal plane, l2For the optics to lens array principal plane away from From b is that 1/2, ω of the size of every piece image in pattern matrix is that 1/2, α of the angle of visual field is the lateral magnification of lens.
8. a kind of bore hole 3D ground sand table display methods, it is characterised in that methods described includes:
The pattern matrix of three-dimensional scenic based on collection, the piece three-dimensional pictures of system reconfiguration sand table are shown using 3D ground sand table Picture.
9. display methods according to claim 8, it is characterised in that in gatherer process, using encoding software by three-dimensional scenic The directional information emitted beam is encoded in pattern matrix.
10. display methods according to claim 8 or claim 9, it is characterised in that 3D ground sand table shows that system includes: Display device, lens array and the optics with scattering function;Wherein,
The display device is used to show the 3D rendering array collected from different perspectives;
The lens array is used to the pattern matrix in display device being imaged;
The optics is used to the lens array imaging being reconstructed into 3D rendering.
CN201610986211.6A 2016-11-09 2016-11-09 A kind of bore hole 3D ground sand table shows system and method Pending CN107092096A (en)

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CN108769655A (en) * 2018-06-06 2018-11-06 北京邮电大学 Projection-type electronic sand table three-dimensional display system
CN108897138A (en) * 2018-06-19 2018-11-27 北京邮电大学 A kind of 3 d light fields display system and method
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CN110244469A (en) * 2019-06-19 2019-09-17 中国人民解放军陆军装甲兵学院 A kind of determination method and system of directional scattering device position and diffusion angle

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CN108732820A (en) * 2018-06-06 2018-11-02 北京邮电大学 Novel electron sand table three-dimensional display system
CN108769655A (en) * 2018-06-06 2018-11-06 北京邮电大学 Projection-type electronic sand table three-dimensional display system
CN108897138A (en) * 2018-06-19 2018-11-27 北京邮电大学 A kind of 3 d light fields display system and method
CN108919502A (en) * 2018-08-03 2018-11-30 北京航空航天大学 A kind of integration imaging double vision 3D display device based on optics diffuser screen
CN109257590A (en) * 2018-08-30 2019-01-22 杭州行开科技有限公司 A kind of naked eye 3D sand table display system and its method
CN110244469A (en) * 2019-06-19 2019-09-17 中国人民解放军陆军装甲兵学院 A kind of determination method and system of directional scattering device position and diffusion angle
CN110244469B (en) * 2019-06-19 2021-03-23 中国人民解放军陆军装甲兵学院 Method and system for determining position and diffusion angle of directional diffuser

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