CN104519341B - A kind of generation method of the micro-pattern matrix of integration imaging of arbitrary inclination - Google Patents

A kind of generation method of the micro-pattern matrix of integration imaging of arbitrary inclination Download PDF

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CN104519341B
CN104519341B CN201510008611.5A CN201510008611A CN104519341B CN 104519341 B CN104519341 B CN 104519341B CN 201510008611 A CN201510008611 A CN 201510008611A CN 104519341 B CN104519341 B CN 104519341B
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micro
pattern matrix
anaglyph
pixel
inclination
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CN104519341A (en
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王琼华
陈军
熊召龙
梁井龙
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Sichuan University
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Sichuan University
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Abstract

The present invention proposes the generation method of the micro-pattern matrix of integration imaging of a kind of arbitrary inclination, and the method includes that circular virtual camera array obtains anaglyph and anaglyph is converted into inclination two steps of micro-pattern matrix.Present invention achieves the micro-pattern matrix directly generating arbitrary inclination, it is to avoid complicated image processing procedure and the process of calculating to great amount of images unit.And, the light information of captured acquisition that the present invention is fully utilized, the 3D rendering of reproduction has edge and not distortion clearly.

Description

A kind of generation method of the micro-pattern matrix of integration imaging of arbitrary inclination
Technical field
The present invention relates to integration imaging 3D(three-dimensional) Display Technique, arbitrarily tilt it is more particularly related to a kind of The generation method of the micro-pattern matrix of integration imaging of angle.
Background technology
Integration imaging is a kind of real tri-dimension Display Technique, and beholder can watch when not wearing any helping regarding equipment To authentic 3D rendering.Along with the fast development of computer technology, people commonly use computer mould and fit the various optics of process Technology, and derive Automated library system imaging technique.Automated library system imaging includes record and reproduces two stages, on record rank Section, sets up 3D virtual scene initially with microcomputer modelling software, then sets up virtual camera array with modeling software and obtain The anaglyph of 3D virtual scene, obtains the most micro-pattern matrix of film source of integration imaging after pixel-map.In the display stage, place Microlens array is in panel surface, and shows that on panel micro-pattern matrix is to reproduce 3D rendering.
In order to eliminate the Moire fringe in 3D display system, need the microlens array on display floater to tilt an angle Degree.Therefore, on panel, micro-pattern matrix of display is also required to identical angle.But, current Automated library system imaging Technology all can only obtain traditional nothing and tilt micro-pattern matrix.By without tilting micro-pattern matrix rotation special angle and to all Image primitive obtains tilting micro-pattern matrix after processing by ad hoc fashion arrangement, adds additional the image procossing to great amount of images unit Process and the process of calculating, and fully utilize can not shoot the light information obtained.
Summary of the invention
The present invention proposes the generation method of the micro-pattern matrix of integration imaging of a kind of arbitrary inclination, such as accompanying drawing 1 institute Showing, the method includes that circular virtual camera array obtains anaglyph and anaglyph is converted into inclination micro-pattern matrix two step Suddenly.
Described circular virtual camera array obtains anaglyph, uses convergence type stereoscopic camera structure, and all cameras are all provided with Putting in a border circular areas, the position coordinates at border circular areas center is (X0, Y0), a diameter of d, each camera is in horizontal and vertical Equidistantly arranging on direction, the spacing of adjacent cameras is D, and each image center is in the same plane, and each camera has common mesh Punctuate O, camera array place plane is L with the distance of the reference planes at each camera subject point O place, and each camera all uses orthogonal 3D virtual scene is rendered by perspective geometry model.Determine the microlens array parameter used when integration imaging shows, lens Unit's pitch is p, and lens cells focal length is f, and it is r × r that single lens covers display panel pixel quantity, includes M × N number of lens altogether Unit.
Preferably, in order to meet anaglyph that virtual camera array renders when being converted into the micro-pattern matrix of inclination the most unrestrained Take and do not lose information, the space D of adjacent cameras, the diameter d of border circular areas at camera place, the position coordinates of each camera (Xi, Yj) meet following formula:
(1)
(2)
(3)
(4)
(5)
Wherein, g is the distance between microlens array and display floater, and i, j are that camera is horizontal in camera array respectively Direction and the numbering of longitudinal direction, i, j are integers, and meet inequality :-d/2≤i≤d/2 respectively ,-d/2≤j≤d/2.
Described anaglyph is converted into the micro-pattern matrix of inclination, and this process is referred to as pixel-map process.I(i, j)i′, j′It is The pixel of the i-th ' row jth ' row in the anaglyph of the i-th row jth row, (m is n) to tilt m row n-th in micro-pattern matrix to arrange to I ' Pixel, then will obtain pixel-map equation is:
(6)
Several anaglyphs carry out pixel-map, and choosing of anaglyph is determined by optimal angle of inclination, and required regards The sequence number i, j of difference image meets formula:
(7)
(8)
(9)
(10)
(11)
Wherein a is intermediate variable, and symbol x represents and rounds x downwards, represents é x ù and rounds up x, and θ is optimal Angle of inclination.
Preferably, tilted image unit is rotated 180 ° around its central point and inverts to eliminate the degree of depth, and this was processed During journey is attached to pixel-map, the relational expression that therefore can obtain between m, n, i, j, i ' and j ' is:
(12)
(13)
Present invention achieves the micro-pattern matrix directly generating arbitrary inclination, it is to avoid the complexity to great amount of images unit Image processing process and the process of calculating.And, the light information of captured acquisition that the present invention is fully utilized, the 3D rendering of reproduction There is edge and not distortion clearly.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic diagram of the micro-pattern matrix of integration imaging directly generating arbitrary inclination.
Accompanying drawing 2 is the schematic diagram tilting micro-pattern matrix.
Shown by reference numeral in above-mentioned accompanying drawing is:
1.3D virtual scene, the 2. plane at camera array impact point place, 3. virtual camera array, 4. anaglyph battle array Row, 5. circular diagram pixel, 6. tilted image unit, 7. tilt micro-pattern matrix.
Should be appreciated that above-mentioned accompanying drawing the most schematically, be not drawn to draw.
Detailed description of the invention
An allusion quotation the following detailed description of the generation method of the micro-pattern matrix utilizing a kind of arbitrary inclination of the present invention Type embodiment, is further described specifically the present invention.Be necessary it is pointed out here that, following example are served only for this Bright it is described further, it is impossible to being interpreted as limiting the scope of the invention, this art skilled person is according to above-mentioned The present invention is made some nonessential improvement and adjustment by present invention, still falls within protection scope of the present invention.
In this embodiment, setting up 3D virtual scene in microcomputer modelling software 3DS MAX, 3D virtual scene includes One 3D object " Kung Fu Panda " and a high definition Background.The plane at " Kung Fu Panda " place and camera array place plane Distance is 1000mm.
Parameter according to this embodiment integration imaging display system arranges camera array, makes in integration imaging display system The parameter of microlens array be: lens cells pitch is 1.25mm, and lens cells focal length is 3.38mm.Integration imaging display system The display floater of middle use is the iPad mini 2 that Apple produces, and its size is 7.9inch, resolution ratio is 2046 × 1536, single Pixel Dimensions is 0.078mm.The present embodiment is assembled to microlens array on iPad mini 2, uses and focuses on mould Formula reproduces 3D rendering, then the distance between microlens array and display floater is equal to the focal length 3.38mm of single lens unit, single It is 16 × 16 that lens cells covers the pixel quantity of display floater.Parameter according to integration imaging display system and formula (1)-(5) This embodiment may determine that the parameter of camera array and the position (X of each camerai, Yj), wherein, camera spacing is 23.1mm, a diameter of 490mm of the border circular areas at camera place.After rendering virtual camera array and obtaining anaglyph, by Several anaglyphs are chosen in good angle of inclination and formula (7)-(11), carry out pixel further according to formula (6), (11) and (12) and reflect Penetrate, it is possible to obtain micro-pattern matrix of arbitrary inclination.The present embodiment have successfully been obtained 20 °, 40 °, 60 ° and 80 ° incline Micro-pattern matrix of rake angle, wherein the micro-pattern matrix of the inclination of 20 ° is as shown in Figure 2.This embodiment integration imaging shows In system, generate the micro-pattern matrix of corresponding inclination according to the optimal angle of inclination of microlens array, be placed in iPad mini Showing in 2, the 3D rendering of reproduction has edge and not distortion clearly.
So far, the method for a kind of micro-pattern matrix directly generating arbitrary inclination of the present invention, it is to avoid to big spirogram The complicated image processing procedure of pixel and the process of calculating.And, the light information of captured acquisition that the present invention is fully utilized, then Existing 3D rendering has edge and not distortion clearly.

Claims (1)

1. the generation method of the micro-pattern matrix of the integration imaging of an arbitrary inclination, it is characterised in that the method includes circle Shape virtual camera array obtains anaglyph and anaglyph is converted into inclination two steps of micro-pattern matrix;Described circle is virtual Camera array obtains anaglyph, it is characterised in that all cameras are arranged at a border circular areas, the position at border circular areas center Putting coordinate is (X0, Y0), a diameter of d, and equidistantly D arrangement in the horizontal and vertical directions, each image center is positioned at same flat On face and be respectively arranged with common objective point O, camera array place plane is L with the distance of the reference planes at impact point O place, all uses 3D virtual scene is rendered by rectangular projection geometrical model, determines the microlens array parameter used when integration imaging shows, Lens cells pitch is p, and lens cells focal length is f, and it is r × r that single lens covers display panel pixel quantity, includes M × N number of altogether Mirror unit, then camera space D, the diameter d of border circular areas, the position (X of each camerai, Yj) meet following formula: D=(p × L)/(r × g), d=×(r-1)×D,Xi=X0+i×D, Yi=Y0+i×D, (Xi-X0)2+(Yj-Y0)2≤1/4×d2, wherein, g is micro- Distance between lens arra and display floater;I, j are camera horizontal direction and volume of longitudinal direction in camera array respectively Number, and be all integer, and meet inequality :-d/2≤i≤d/2 ,-d/2≤j≤d/2;Described anaglyph is converted into inclination Micro-pattern matrix, it is characterised in that and I (i, j)i′, j′It is the pixel of the i-th ' row jth ' row in the anaglyph of the i-th row jth row, I ' (m, is n) to tilt the pixel of m row the n-th row in micro-pattern matrix, then will obtain pixel-map equation is: I ' (m, n)= I(i, j)i′, j′, several anaglyphs carry out pixel-map, and the sequence number i, j of required anaglyph meets formula:
,
,
,
,
,
Wherein a is intermediate variable, symbolRepresent and round downwards,Representative rounds up, and θ is optimal inclination angle Degree, is attached to the processing procedure eliminating degree of depth reversion in pixel-map, therefore can obtain between m, n, i, j, i ' and j ' Relational expression is:
,
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