CN111258084A - LED full-parallax integrated imaging display method - Google Patents
LED full-parallax integrated imaging display method Download PDFInfo
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- CN111258084A CN111258084A CN202010057368.7A CN202010057368A CN111258084A CN 111258084 A CN111258084 A CN 111258084A CN 202010057368 A CN202010057368 A CN 202010057368A CN 111258084 A CN111258084 A CN 111258084A
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Abstract
An LED full parallax integration imaging display method belongs to the field of three-dimensional image display, and the system related to the method comprises the following steps: the LED display screen displays a generated three-dimensional element image array, the lens array and the baffle plate are used for projecting the generated three-dimensional element image onto the diffusion screen, the diffusion screen is used for providing a continuous three-dimensional display effect with full parallax, the lens array is closely arranged, holes of the baffle plate are arranged in an odd-even mode, the baffle plate is matched with the lens array, the problems of optical crosstalk and aliasing between adjacent lenses can be solved, the diffusion screen recovers information of a shielded optical field to a certain degree to achieve a clear visual effect, and simulation and experimental results show that the display method provided by the invention is superior to a traditional integrated imaging display method, and experiments prove that the method provided by the invention has feasibility and effectiveness.
Description
Technical Field
The invention belongs to the technical field of three-dimensional image display, and particularly relates to an LED full parallax integrated imaging display method.
Background
The integrated imaging technology is a 3D image technology that records a spatial scene of an object by using a lens array and reproduces the spatial scene, and is one of the most promising 3D display technologies at present. The 3D image reproduced by the integrated imaging technology includes full true color and continuous parallax information, and a viewer can obtain a feeling of viewing a real scene. Conventional integrated imaging systems comprise two basic parts: an acquisition section of a three-dimensional image and a display section of the three-dimensional image. In the process of collecting the three-dimensional image, a recording lens array is used for collecting a space object scene, and 3D scene information with different viewpoints is recorded in the three-dimensional image. In the process of three-dimensional image display, the acquired three-dimensional element image is displayed through a projector array or a display panel, the same lens array is placed in front of the display panel, and a 3D scene is reconstructed according to the principle that an optical path is reversible.
In a traditional integrated imaging display system, light rays emitted by each stereoscopic element image are diffused light in a scattering direction and in a conical shape, and because the display lens array is closely arranged, the light rays can enter surrounding lenses, crosstalk and aliasing are caused to surrounding viewpoints, the display resolution is reduced, and the viewing effect is influenced.
Disclosure of Invention
The invention aims to provide an LED full-parallax integrated imaging display method capable of reducing crosstalk and aliasing problems of adjacent lens elements.
The LED full parallax integrated imaging display method comprises the following steps:
1. an LED full parallax integration imaging display method is characterized by comprising the following steps:
1.1, displaying the generated three-dimensional element image array by using an LED display screen 1, wherein m multiplied by n three-dimensional element images exist in the three-dimensional element image array;
1.2 utilize lens array 2 and shielding plate 3, project the stereoscopic component image on diffusion screen 4, include the following steps:
1.2.1 the number of lens elements in the lens array 2 is the same as the number of voxels in the voxel image array, and is m × n, where: n is the number of each row of lens elements in the lens array 2, m is the number of each column of lens elements in the lens array 2, and the diameter of the lens elements is P1The lens array 2 and the LED display screen 1 are positioned on the same horizontal plane, the lens array 2 is arranged in front of the LED display screen 1 in parallel, and the vertical distance between the lens array 2 and the LED display screen 1 is g;
1.2.2 the center of the i-th row and j-th column of the generated stereoscopic element image array corresponds to the i-th row and j-th column of the lens element L in the lens array 2ijWherein: i is less than or equal to m, j is less than or equal to N, i belongs to N+，j∈N+；
1.2.3 the shutter 3 is placed on the same level as the lens array 2, and the shutter 3 is attached to the front surface of the lens array 2, when i is 2a +1,
a∈N+，j＝2b+1，
b∈N+and i is 2a, and i is,
a∈N+，j＝2b，
b∈N+at the same time, the lens unit L is mounted by the shielding plate 3ijTotal shielding, wherein: i is 2a +1, i is,
a∈N+and j is 2b +1,
b∈N+denotes an odd number, a is a value in the range of
B is a value in the range of
A positive integer of (d); i is equal to 2a, and i is equal to 2a,
a∈N+and j is 2b,
b∈N+denotes an even number, a is a value range of
B is a value in the range of
That is, the shielding plate 3 shields the lens elements in the odd-numbered columns in the odd-numbered rows and the lens elements in the even-numbered columns in the even-numbered rows of the lens array 2; in lens elements L corresponding to other i rows and j columnsijHoles are designed at the positions corresponding to the shielding plates 3, namely, the holes are designed at the positions corresponding to the shielding plates (3) in front of the lens elements at the even-numbered columns in the odd-numbered rows and the lens elements at the odd-numbered columns in the even-numbered rows of the lens array (2), and the diameter of each hole is P2The center position of the hole is the same as that of the lens element, and the shape of the hole is the same as that of the lens element;
1.3 providing a three-dimensional display of full parallax stereoscopic effect using a diffuser screen 4, comprising the steps of:
1.3.1 put diffusion screen 4 and lens array 2 on same horizontal plane, and diffusion screen 4 parallel placement is in front of lens array 2, and the vertical distance of diffusion screen 4 and lens array 2 is s to accord with mathematical expression:
wherein: g is the vertical distance between the lens array 2 and the LED display screen 1; f is the focal length of the lens elements in the lens array 2;
1.3.2 the diffuser screen 4 diffuses the light passing through the lens array 2 and the shutter 3 at an angle ω to obtain a continuous three-dimensional image, wherein:
the invention solves the problems of crosstalk and aliasing among the stereo element images by using the shielding plate, reconstructs the light field by using the diffusion screen, forms continuous viewpoints and improves the visual viewing effect.
Drawings
FIG. 1 is a flow chart of an LED full parallax integrated imaging display method
FIG. 2 is a schematic diagram of a conventional integrated imaging principle
FIG. 3 is a schematic diagram of a display system according to the present invention
FIG. 4 is a schematic view of the light distribution of the display system of the present invention
FIG. 5 is a schematic view of the structure of the lens array and the shielding plate
FIG. 6 is a schematic view of a shielding plate
FIG. 7 is a diagram of the display effect of the integrated imaging without the shielding plate and the diffusion screen
FIG. 8 is a diagram of the imaging effect of the display method proposed by the present invention
Wherein: A. acquisition system B, display system 1, LED display screen 2, lens array 3, shielding plate 4 and diffusion screen
Detailed Description
The invention is described below with reference to the drawings.
1. Display of generated stereoscopic element image array by using LED display screen 1
FIG. 3 is a schematic diagram of a display system of the present invention, the system comprising: the LED display device comprises an LED display 1, a lens array 2, a shielding plate 3 and a diffusion screen 4. Fig. 2(a) is an integrated imaging acquisition system, which generates a three-dimensional element image array, where different three-dimensional element images in the three-dimensional element image array display object images with different viewing angles, and the whole three-dimensional element image array has m × n three-dimensional element images. The generated anay of stereoscopic images is displayed with an LED display 1 in an integrated imaging display system.
2. The lens array 2 and the shielding plate 3 are used for projecting the stereo element image onto the diffusion screen 4
As shown in fig. 3, the lens array 2 is placed on the same horizontal plane parallel to the LED display screen 1, the vertical distance between the two is g, the number of lens elements in the lens array 2 is the same as the number of voxel elements in the voxel image array, and is also m × n, where: n is the number of lens elements in each row of the lens array 2, and m is the number of lens elements in each column of the lens array 2. As shown in FIG. 5, the lens elements in the lens array 2 have a diameter P1The generated stereoscopic element image of the ith row and the jth column in the stereoscopic element image array is centered on the corresponding lens element L in the lens array 2ijWherein: i is less than or equal to m, j is less than or equal to N, i belongs to N+，j∈N+. The shielding plate 3 is designed as shown in fig. 6, the shielding plate 3 is placed on the same horizontal plane with the lens array 2, the shielding plate 3 is closely attached to the front surface of the lens array 2, when i is 2a +1,
a∈N+，j＝2b+1，
b∈N+and i is 2a, and i is,
a∈N+，j＝2b，
b∈N+at the same time, the lens unit L is mounted by the shielding plate 3ijTotal shielding, wherein: i is 2a +1, i is,
a∈N+and j is 2b +1,
b∈N+denotes an odd number, a is a value in the range of
Positive integer of (1)B is a value range of
A positive integer of (d); i is equal to 2a, and i is equal to 2a,
a∈N+and j is 2b,
b∈N+denotes an even number, a is a value range of
B is a value in the range of
That is, the shielding plate 3 shields the lens elements in the odd-numbered columns in the odd-numbered rows and the lens elements in the even-numbered columns in the even-numbered rows of the lens array 2; in lens elements L corresponding to other i rows and j columnsijHoles are designed at the positions corresponding to the front shielding plate 3, namely, holes are designed at the positions corresponding to the shielding plate 3 in front of the lens elements at the even-numbered columns in the odd-numbered rows and the lens elements at the odd-numbered columns in the even-numbered rows of the lens array 2, and the diameter of each hole is P2As shown in fig. 5, the center position of the hole is the same as the center position of the lens element, the shape of the hole is the same as the shape of the lens element, and both the circular lens and the square lens are suitable for the present invention.
3. Three-dimensional display providing full parallax stereoscopic effect using a diffuser screen 4
The diffusion screen 4 and the lens array 2 are placed on the same horizontal plane, the diffusion screen 4 is placed in parallel on the front side of the lens array 2, the vertical distance between the diffusion screen 4 and the lens array 2 is s, wherein
f is the focal length of the lens elements in the lens array 2; the light rays passing through the lens array 2 and the shielding plate 4 are diffused at an angle of omega, and a continuous three-dimensional image can be obtained on an imaging plane, wherein
The present invention will be described in further detail with reference to the following detailed description of exemplary embodiments thereof. In order to show that the method provided by the invention has universality and feasibility, two groups of experimental verifications are carried out, and the display effect of the method is compared with the display effect of the traditional integrated imaging, namely the display effect of the integrated imaging without the shielding plate 3 and the diffusion screen 4.
Experiment one
The LED display screen 1 is a high-density small-spacing LED display screen and is used for displaying a three-dimensional element image array. The display resolution of the LED display screen 1 is 384 multiplied by 384, the pixel size is 1.25mm, and the size of the LED display screen 1 is 480 multiplied by 480 mm; the distance between the lens array 2 and the LED display screen 1 is 80 mm; the lens array 2 is a circular lens array and consists of 24 multiplied by 24 lens elements, the diameter of each lens element is 20mm, and the focal length is 60 mm; the LED display panel 1 displays a total of 24 × 24 stereoscopic images, each having a resolution of 16 × 16. The shielding plate 3 is closely attached to the lens array 2, the size of the shielding plate 3 is 480 × 480mm, the structure is shown in fig. 6(a), each hole is circular, the diameter of each hole is 8mm, the shielding plate 3 shields the three-dimensional element image at the corresponding position in the three-dimensional element image array, and meanwhile, light of the three-dimensional element image at the corresponding position of each hole passes through the shielding plate, so that crosstalk between adjacent images is reduced. The diffuser screen 4 is placed at a distance s from the lens array 2, wherein
In the first calculation experiment, s is 240mm, light of the stereoscopic image passing through the shielding plate 3 is diffused by the diffusion screen 4 and then imaged, and the angle of the diffusion screen 4 is as follows:
the diffusion angle of the diffusion screen 4 was calculated to be 4.29 °, and the diffusion screen 4 having a diffusion angle of 5 ° was selected in experiment one, and the display result is shown in fig. 8 (a).
A contrast experiment of the first experiment is carried out, the contrast experiment of the first experiment is a traditional integrated imaging display method, namely an integrated imaging display method without a shielding plate 3 and a diffusion screen 4, the principle is shown in fig. 2, an LED display screen 1 used in the contrast experiment is the same as the LED display screen 1 in the first experiment, a stereoscopic element image array displayed by the LED display screen 1 is the same as the stereoscopic element image array in the first experiment, light rays of the stereoscopic element image are reconstructed through a lens array 2 which is the same as the lens array 2 in the first experiment, and an obtained stereoscopic display image is shown in fig. 7 (a).
Experiment two
The LED display screen 1 is a high-density and small-spacing LED display screen and is used for displaying a stereoscopic element image array. The display resolution of the LED display panel 1 is 384 × 384, the pixel size is 1.25mm, and the size of the LED display panel 1 is 480 × 480 mm. The distance between the lens array 2 and the display screen is 70 mm. The lens array 2 is a square lens array, and is composed of 48 × 48 lens elements, each lens element has a diameter of 10mm and a focal length of 60 mm. The LED display panel 1 displays a total of 48 × 48 voxel images each having a resolution of 8 × 8. The shielding plate 3 is closely attached to the lens array 2, the size of the shielding plate 3 is 480 x 480mm, the structure is shown in fig. 6(b), each hole is square, the side length of each hole is 7.5mm, the shielding plate 3 shields the three-dimensional element image at the corresponding position in the three-dimensional element image array, and meanwhile, light rays of the three-dimensional element image at the corresponding position of each hole are allowed to pass through, so that crosstalk between adjacent images is reduced. The diffuser screen 4 is placed at a distance s from the lens array 2, wherein
In the first calculation experiment, when s is 420mm, the light of the stereo image passing through the shielding plate 3 is diffused by the diffusion screen 4 and then imaged, and the angle of the diffusion screen 4 is
The diffusion angle of the diffusion screen 4 was calculated to be 1.70 °, and the diffusion screen 4 having a diffusion angle of 1 ° was selected in experiment two, and the display result is shown in fig. 8 (b).
And (3) carrying out a contrast experiment of the second experiment, wherein the contrast experiment of the second experiment is a traditional integrated imaging display method, namely an integrated imaging display method without a shielding plate 3 and a diffusion screen 4, the principle is as shown in fig. 2, the LED display screen 1 used in the contrast experiment is the same as the LED display screen in the second experiment, the stereoscopic element image array displayed by the LED display screen 1 is the same as the stereoscopic element image array in the second experiment, the light of the stereoscopic element image is reconstructed through the lens array 2 which is the same as the lens array 2 in the second experiment, and the obtained stereoscopic display image is as shown in fig. 7 (b).
Claims (1)
1. An LED full parallax integration imaging display method is characterized by comprising the following steps:
1.1, displaying the generated stereoscopic element image array by using an LED display screen (1), wherein m multiplied by n stereoscopic element images exist in the stereoscopic element image array;
1.2 utilize lens array (2) and shielding plate (3), project the three-dimensional component image on diffusion screen (4), include the following steps:
1.2.1 the number of lens elements in the lens array (2) is the same as the number of voxel elements in the stereoscopic element image array, and is m × n, wherein: n is the number of each row of lens elements in the lens array (2), m is the number of each column of lens elements in the lens array (2), and the diameter of the lens elements is P1The lens array (2) and the LED display screen (1) are positioned on the same horizontal plane, the lens array (2) is arranged in front of the LED display screen (1) in parallel, and the vertical distance between the lens array (2) and the LED display screen (1) is g;
1.2.2 the center of the i-th row and j-th column of the generated stereoscopic element image array corresponds to the i-th row and j-th column of the lens element L in the lens array (2)ijWherein: i is less than or equal to m, j is less than or equal to N, i belongs to N+，j∈N+；
1.2.3 the shielding plate (3) is placed on the same horizontal plane with the lens array (2), the shielding plate (3) is closely attached to the front surface of the lens array (2), when i is 2a +1,
a∈N+，j＝2b+1，
b∈N+and i is 2a, and i is,
a∈N+，j＝2b，
b∈N+in the meantime, the lens unit L is mounted by the shielding plate (3)ijTotal shielding, wherein: i is 2a +1, i is,
a∈N+and j is 2b +1,
b∈N+denotes an odd number, a is a value in the range of
B is a value in the range of
A positive integer of (d); i is equal to 2a, and i is equal to 2a,
a∈N+and j is 2b,
b∈N+denotes an even number, a is a value range of
B is a value in the range of
The shielding plate (3) shields the lens elements of the odd-numbered columns in the odd-numbered rows and the lens elements of the even-numbered columns in the even-numbered rows of the lens array (2); in lens elements L corresponding to other i rows and j columnsijHoles are designed at the corresponding positions of the front shielding plates (3), namely, the even-numbered columns in the odd-numbered rows of the lens array (2)The lens element and the shielding plate (3) in front of the lens element in the odd-numbered column in the even-numbered row are provided with holes with the diameter of P2The center position of the hole is the same as that of the lens element, and the shape of the hole is the same as that of the lens element;
1.3 three-dimensional display providing full parallax stereoscopic effect using a diffuser screen (4), comprising the steps of:
1.3.1 put diffusion screen (4) and lens array (2) on same horizontal plane, and diffusion screen (4) parallel placement is in the front of lens array (2), and the vertical distance of diffusion screen (4) and lens array (2) is s to accord with mathematical expression:
wherein: g is the vertical distance between the lens array (2) and the LED display screen (1); f is the focal length of the lens elements in the lens array (2);
1.3.2 the diffuser screen (4) diffuses the light passing through the lens array (2) and the shutter (3) at an angle ω to obtain a continuous three-dimensional image, wherein:
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113642282A (en) * | 2021-08-17 | 2021-11-12 | 复旦大学 | Optical neural interface optimization design method based on micro LED array |
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