CN112019830A - Element image correction method and system of integrated imaging three-dimensional display system - Google Patents

Element image correction method and system of integrated imaging three-dimensional display system Download PDF

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CN112019830A
CN112019830A CN202010909491.7A CN202010909491A CN112019830A CN 112019830 A CN112019830 A CN 112019830A CN 202010909491 A CN202010909491 A CN 202010909491A CN 112019830 A CN112019830 A CN 112019830A
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pixel
corrected
distance
compensated
axial distance
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CN112019830B (en
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闫兴鹏
燕展
蒋晓瑜
刘云鹏
王晨卿
毛岩
屈强
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Academy of Armored Forces of PLA
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract

The invention discloses an element image correction method and system of an integrated imaging three-dimensional display system. The method comprises the following steps: obtaining the transverse distance of the compensated pixel according to the number of pixels of the element image to be corrected, the preset axial distance, the actual axial distance and the transverse distance of the pixel to be corrected, and determining the pixel value of the compensated pixel by adopting an interpolation method; and when all the pixels in the element image to be corrected are corrected, obtaining the corrected element image. By adopting the element image correction method, the influence on imaging caused by axial errors of the lens unit is avoided by correcting the pixels in the element image, and the imaging effect of the three-dimensional display system is improved.

Description

Element image correction method and system of integrated imaging three-dimensional display system
Technical Field
The invention relates to the technical field of integrated imaging, in particular to an element image correction method and system of an integrated imaging three-dimensional display system.
Background
In the integrated imaging three-dimensional display system, the position relation between pixels on an LCD display screen and unit lenses in a lens array determines the direction information of reconstruction light rays, when axial errors exist between the LCD and the lens array, the space direction of original reconstruction light rays is changed, so that the convergence points of different reconstruction light rays are deviated, and due to the reasons of production, installation errors, system deformation and the like, the real axial distance errors in the integrated imaging three-dimensional display system cannot be avoided, so that the display system has the phenomena of fuzzy display, splitting, distortion and the like, and the final display effect is seriously influenced.
Disclosure of Invention
The invention aims to provide an element image correction method and system of an integrated imaging three-dimensional display system, which have the advantages of avoiding the influence on imaging caused by axial errors of a lens unit and improving the imaging effect of the three-dimensional display system.
In order to achieve the purpose, the invention provides the following scheme:
an elemental image correction method for an integrated imaging three-dimensional display system, comprising:
acquiring the number of pixels of an element image to be corrected, a preset axial distance of a lens unit, an actual axial distance of the lens unit and a transverse distance of the pixels to be corrected; the preset axial distance is the distance from the optical center of the lens unit positioned at the preset lens position to the LCD screen; the actual axial distance is the distance from the optical center of the lens unit positioned at the actual lens position to the LCD screen; the transverse distance of the pixel to be corrected is the distance between the pixel to be corrected on the element image to be corrected and the corresponding pixel of the optical center of the lens unit positioned on the preset lens position on the LCD screen;
according to the number of the pixels of the element image to be corrected, the preset axial distance, the actual axial distance and the transverse distance of the pixels to be corrected, compensating the transverse position of the pixels to be corrected by adopting an axial distance error compensation method to obtain the transverse distance of the compensated pixels;
acquiring a pixel value of the pixel to be corrected, a transverse distance between the pixel to be corrected and a pixel adjacent to the pixel to be corrected and a pixel value of the pixel adjacent to the pixel to be corrected;
determining the pixel value of the compensated pixel by adopting an interpolation method according to the transverse distance of the compensated pixel, the pixel value of the pixel to be corrected, the transverse distance of the pixel adjacent to the pixel to be corrected and the pixel value of the pixel adjacent to the pixel to be corrected;
judging whether each pixel of the element image to be corrected is traversed or not to obtain a first judgment result; if the first judgment result is yes, generating a corrected element image according to the pixel values of all the compensated pixels and the transverse distances of all the compensated pixels; and if the first judgment result is negative, updating the pixel to be corrected, determining the transverse distance of the updated pixel to be corrected, and then returning to the step of compensating the transverse position of the pixel to be corrected by adopting an axial distance error compensation method according to the number of the pixels of the element image to be corrected, the preset axial distance, the actual axial distance and the transverse distance of the pixel to be corrected to obtain the transverse distance of the pixel after compensation.
Optionally, the compensating, according to the number of pixels of the element image to be corrected, the preset axial distance, the actual axial distance, and the lateral distance of the pixel to be corrected, the lateral position of the pixel to be corrected by using an axial distance error compensation method to obtain the lateral distance of the pixel after compensation, and then the method further includes:
judging whether the transverse distance of the compensated pixel is in a transverse distance set of all pixels in the element image to be corrected or not to obtain a second judgment result;
if the second judgment result is negative, setting the pixel value of the compensated pixel to zero, and executing the step of judging whether each pixel of the element image to be corrected is traversed or not to obtain a first judgment result;
if the second judgment result is yes, executing the step of obtaining the pixel value of the pixel to be corrected, the transverse distance between the pixel to be corrected and the pixel adjacent to the pixel to be corrected and the pixel value of the pixel adjacent to the pixel to be corrected.
Optionally, the compensating, according to the number of pixels of the element image to be corrected, the preset axial distance, the actual axial distance, and the transverse distance of the pixel to be corrected, the transverse position of the pixel to be corrected by using an axial distance error compensation method to obtain the transverse distance of the pixel after compensation, specifically includes:
the lateral distance of the compensated pixel is determined using the following equation:
Figure BDA0002662710740000021
in the formula:
Figure BDA0002662710740000031
represents the lateral distance, x 'of the compensated pixel i'jRepresents the lateral distance of the pixel j to be corrected, g represents the preset axial distance, grRepresenting the actual axial distance; n issRepresenting the number of pixels of the elemental image to be corrected.
Optionally, the determining, according to the lateral distance of the compensated pixel, the pixel value of the pixel to be corrected, the lateral distance of the pixel adjacent to the pixel to be corrected, and the pixel value of the pixel adjacent to the pixel to be corrected, the pixel value of the compensated pixel by using an interpolation method specifically includes:
determining a pixel value of the compensated pixel using the following equation:
Figure BDA0002662710740000032
in the formula (I), the compound is shown in the specification,
Figure BDA0002662710740000033
representing the pixel value of the compensated pixel I, IjRepresenting the pixel value, I, of the pixel j to be correctedj+1Denotes a pixel value, x 'of a pixel j +1 adjacent to the pixel to be corrected'j+1Representation and pending correctionThe lateral position of the positive pixel neighbor pixel j + 1.
An elemental image correction system for an integrated imaging three-dimensional display system, comprising:
the first data acquisition module is used for acquiring the number of pixels of an element image to be corrected, the preset axial distance of the lens unit, the actual axial distance of the lens unit and the transverse distance of the pixels to be corrected; the preset axial distance is the distance from the optical center of the lens unit positioned at the preset lens position to the LCD screen; the actual axial distance is the distance from the optical center of the lens unit positioned at the actual lens position to the LCD screen; the transverse distance of the pixel to be corrected is the distance between the pixel to be corrected on the element image to be corrected and the corresponding pixel of the optical center of the lens unit positioned on the preset lens position on the LCD screen;
the compensated axial distance determining module is used for compensating the transverse position of the pixel to be corrected by adopting an axial distance error compensation method according to the number of the pixels of the element image to be corrected, the preset axial distance, the actual axial distance and the transverse distance of the pixel to be corrected to obtain the transverse distance of the pixel to be corrected;
the second data acquisition module is used for acquiring the pixel value of the pixel to be corrected, the transverse distance between the pixel to be corrected and the pixel adjacent to the pixel to be corrected and the pixel value of the pixel adjacent to the pixel to be corrected;
a compensated pixel value determining module, configured to determine a pixel value of a compensated pixel by using an interpolation method according to a lateral distance of the compensated pixel, a pixel value of the pixel to be corrected, a lateral distance of a pixel adjacent to the pixel to be corrected, and a pixel value of a pixel adjacent to the pixel to be corrected;
the first judgment module is used for judging whether each pixel of the element image to be corrected is traversed or not to obtain a first judgment result; when the first judgment result is yes, executing a corrected element image generation module; when the first judgment result is negative, executing a correction pixel updating module;
the corrected element image generating module is used for generating a corrected element image according to the pixel values of all the compensated pixels and the transverse distances of all the compensated pixels;
the correction pixel updating module is used for updating the pixel to be corrected and executing an updated pixel axial distance determining sub-module;
and the updated pixel axial distance determining submodule is used for determining the updated transverse distance of the pixel to be corrected and executing the compensated axial distance determining module.
Optionally, the system further includes:
the second judgment module is used for judging whether the transverse distance of the compensated pixel is in the transverse distance set of all pixels in the element image to be corrected or not to obtain a second judgment result;
when the second judgment result is negative, executing a pixel value zero setting module; when the second judgment result is yes, executing a second data acquisition module;
and the execution pixel value zero setting module is used for setting the pixel value of the compensated pixel to zero and executing the first judgment module.
Optionally, the compensated axial distance determining module includes:
a compensated axial distance determination submodule for determining the lateral distance of the compensated pixel using the following formula:
Figure BDA0002662710740000041
in the formula:
Figure BDA0002662710740000042
represents the lateral distance, x 'of the compensated pixel i'jRepresents the lateral distance of the pixel j to be corrected, g represents the preset axial distance, grRepresenting the actual axial distance; n issRepresenting the number of pixels of the elemental image to be corrected.
Optionally, the compensated pixel value determining module includes:
a compensated pixel value determination sub-module for determining the pixel value of the compensated pixel using the following formula:
Figure BDA0002662710740000043
in the formula (I), the compound is shown in the specification,
Figure BDA0002662710740000044
representing the pixel value of the compensated pixel I, IjRepresenting the pixel value, I, of the pixel j to be correctedj+1Denotes a pixel value, x 'of a pixel j +1 adjacent to the pixel to be corrected'j+1Indicating the lateral position of the pixel j +1 adjacent to the pixel to be corrected.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an element image correction method and system of an integrated imaging three-dimensional display system, wherein the method comprises the following steps: obtaining the transverse distance of the compensated pixel according to the number of pixels of the element image to be corrected, the preset axial distance, the actual axial distance and the transverse distance of the pixel to be corrected, and determining the pixel value of the compensated pixel by adopting an interpolation method; and when all the pixels in the element image to be corrected are corrected, obtaining the corrected element image. According to the element image correction method provided by the invention, the pixels in the element image are corrected, so that the influence on imaging caused by axial errors of the lens unit is avoided, and the imaging effect of the three-dimensional display system is improved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a flowchart of a method for correcting elemental images of an integrated imaging three-dimensional display system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an elemental image correction system of an integrated imaging three-dimensional display system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of determining the lateral distance of a compensated pixel provided by an embodiment of the present invention;
fig. 4 is a schematic diagram of determining a pixel value of a compensated pixel according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an element image correction method and system of an integrated imaging three-dimensional display system, which have the advantages of avoiding the influence on imaging caused by axial errors of a lens unit and improving the imaging effect of the three-dimensional display system.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Examples
Fig. 1 is a flowchart of a method for correcting an elemental image of an integrated imaging three-dimensional display system according to an embodiment of the present invention, and as shown in fig. 1, the method for correcting an elemental image according to the present invention includes:
step 101: the method comprises the steps of obtaining the number of pixels of an element image to be corrected, the preset axial distance of a lens unit, the actual axial distance of the lens unit and the transverse distance of the pixels to be corrected. The preset axial distance is the distance from the optical center of the lens unit positioned at the preset lens position to the LCD screen; the actual axial distance is the distance from the optical center of the lens unit positioned at the actual lens position to the LCD screen; the transverse distance of the pixel to be corrected is the distance between the pixel to be corrected on the element image to be corrected and the corresponding pixel of the optical center of the lens unit positioned on the preset lens position on the LCD screen.
Step 102: and compensating the transverse position of the pixel to be corrected by adopting an axial distance error compensation method according to the number of the pixels of the element image to be corrected, the preset axial distance, the actual axial distance and the transverse distance of the pixel to be corrected to obtain the transverse distance of the pixel after compensation.
Step 102 specifically includes: the lateral distance of the compensated pixel is determined using the following equation:
Figure BDA0002662710740000061
in the formula:
Figure BDA0002662710740000062
represents the lateral distance, x 'of the compensated pixel i'jRepresents the lateral distance of the pixel j to be corrected, g represents the preset axial distance, grRepresenting the actual axial distance; n issRepresents the number of pixels of the elemental image to be corrected,
Figure BDA0002662710740000063
indicating a rounding down.
Step 103: and acquiring the pixel value of the pixel to be corrected, the transverse distance between the pixel to be corrected and the pixel adjacent to the pixel to be corrected and the pixel value of the pixel adjacent to the pixel to be corrected.
Step 104: and determining the pixel value of the compensated pixel by adopting an interpolation method according to the transverse distance of the compensated pixel, the pixel value of the pixel to be corrected, the transverse distance between the pixel adjacent to the pixel to be corrected and the pixel value of the pixel adjacent to the pixel to be corrected.
Step 104 specifically includes determining the pixel value of the compensated pixel using the following formula:
Figure BDA0002662710740000064
in the formula (I), the compound is shown in the specification,
Figure BDA0002662710740000065
representing the pixel value of the compensated pixel I, IjRepresenting a pixel to be correctedPixel value of j, Ij+1Denotes a pixel value, x 'of a pixel j +1 adjacent to the pixel to be corrected'j+1Indicating the lateral position of the pixel j +1 adjacent to the pixel to be corrected.
Step 104 is followed by: judging whether the transverse distance of the compensated pixel is in the transverse distance set of all pixels in the element image to be corrected or not to obtain a second judgment result; if the second judgment result is no, setting the pixel value of the compensated pixel to zero, and executing step 105; if the second determination result is yes, step 105 is executed.
Step 105: judging whether each pixel of the element image to be corrected is traversed or not to obtain a first judgment result; if the first determination result is yes, go to step 106; if the first determination result is negative, step 107 is executed.
Step 106: and generating a corrected element image according to the pixel values of all the compensated pixels and the transverse distances of all the compensated pixels.
Step 107: and updating the pixel to be corrected, determining the transverse distance of the updated pixel to be corrected, and then returning to the step 102.
Fig. 2 is a schematic structural diagram of an elemental image correction system of an integrated imaging three-dimensional display system according to an embodiment of the present invention, and as shown in fig. 2, the elemental image correction system according to the present invention includes:
the first data obtaining module 201 is configured to obtain the number of pixels of the elemental image to be corrected, a preset axial distance of the lens unit, an actual axial distance of the lens unit, and a lateral distance of the pixels to be corrected. The preset axial distance is the distance from the optical center of the lens unit positioned at the preset lens position to the LCD screen; the actual axial distance is the distance from the optical center of the lens unit positioned at the actual lens position to the LCD screen; the transverse distance of the pixel to be corrected is the distance between the pixel to be corrected on the element image to be corrected and the corresponding pixel of the optical center of the lens unit positioned on the preset lens position on the LCD screen.
And a compensated axial distance determining module 202, configured to compensate the lateral position of the pixel to be corrected by using an axial distance error compensation method according to the number of pixels of the element image to be corrected, the preset axial distance, the actual axial distance, and the lateral distance of the pixel to be corrected, so as to obtain the lateral distance of the pixel after compensation.
The compensated axial distance determination module 202 includes a compensated axial distance determination sub-module configured to determine the lateral distance of the compensated pixel using the following formula:
Figure BDA0002662710740000071
in the formula:
Figure BDA0002662710740000072
represents the lateral distance, x 'of the compensated pixel i'jRepresents the lateral distance of the pixel j to be corrected, g represents the preset axial distance, grRepresenting the actual axial distance; n issRepresents the number of pixels of the elemental image to be corrected,
Figure BDA0002662710740000073
indicating a rounding down.
The second data obtaining module 203 is configured to obtain a pixel value of the pixel to be corrected, a lateral distance from a pixel adjacent to the pixel to be corrected, and a pixel value of a pixel adjacent to the pixel to be corrected.
And a compensated pixel value determining module 204, configured to determine a pixel value of the compensated pixel by using an interpolation method according to the lateral distance of the compensated pixel, the pixel value of the pixel to be corrected, the lateral distance between the pixel to be corrected and a pixel adjacent to the pixel to be corrected, and the pixel value of the pixel adjacent to the pixel to be corrected.
The compensated pixel value determining module 204 includes a compensated pixel value determining sub-module, and the compensated pixel value determining sub-module is configured to determine a pixel value of a compensated pixel by using the following formula:
Figure BDA0002662710740000081
in the formula (I), the compound is shown in the specification,
Figure BDA0002662710740000082
representing compensated pixelsI pixel value, IjRepresenting the pixel value, I, of the pixel j to be correctedj+1Denotes a pixel value, x 'of a pixel j +1 adjacent to the pixel to be corrected'j+1Indicating the lateral position of the pixel j +1 adjacent to the pixel to be corrected.
The present invention provides an elemental image correction system, further comprising: the second judgment module is used for judging whether the transverse distance of the compensated pixel is in the transverse distance set of all pixels in the element image to be corrected or not to obtain a second judgment result; when the second judgment result is negative, executing a pixel value zero setting module; and when the second judgment result is yes, executing a second data acquisition module.
A pixel value zero setting module, configured to zero the pixel value of the compensated pixel, and execute the first determining module 205.
The first judging module 205 is configured to judge whether each pixel of the element image to be corrected is traversed, so as to obtain a first judgment result; when the first judgment result is yes, the corrected elemental image generation module 206 is executed; when the first determination result is negative, the corrected pixel update module 207 is executed.
A corrected elemental image generating module 206, configured to generate a corrected elemental image according to the pixel values of all the compensated pixels and the lateral distances of all the compensated pixels.
And the correction pixel updating module 207 is used for updating the pixel to be corrected and executing an updated pixel axial distance determination sub-module.
And the updated pixel axial distance determination submodule is used for determining the updated transverse distance of the pixel to be corrected and executing the compensated axial distance determination module 202.
Specifically, as shown in fig. 3-4, the core of the axial distance error compensation is to keep the position of the compensated reconstruction point consistent with the position of the ideal reconstruction point, fig. 3 is a schematic diagram for determining the lateral distance of the compensated pixel according to the embodiment of the present invention, as shown in fig. 3, R is a preset reconstruction point, x is xRFor the purpose of presetting the vertical distance, z, of the reconstruction point R to the optical center of the lens cell at the actual lens positionRIs the level of the preset reconstruction point R to the optical center of the lens unit at the ideal lens positionDistance.
Obtaining the actual axial distance g of the lens unitrThen, the lateral distance of the compensated pixel can be determined according to the position of the preset reconstruction point R, and therefore, the axial distance error can be compensated by adjusting the position of the pixel point of the corresponding element image. As shown in FIG. 3, the dotted line lens represents the ideal position of the lens unit, the solid line lens represents the actual position of the lens unit, g represents the distance from the optical center of the lens unit located at the preset position to the LCD screen (i.e., the preset axial distance), and g represents the distance from the optical center of the lens unit located at the preset position to the LCD screenrIndicating the distance from the optical center of the lens unit at the actual position to the LCD screen (i.e. the actual axial distance). For any light ray of the reconstructed image point R, the light ray passes through the optical center of the lens unit at the preset position, the corresponding pixel on the LCD screen is a pixel to be compensated, the pixel to be compensated and the L < th > pixeln-1The lateral distance of the optical center of each lens unit is x', assuming the L-th lens unitnThe position of each lens unit is the same as the preset position, and in order to ensure that the spatial position of the reconstructed image point R is unchanged, the transverse distance of the compensated pixel is x in practical situation after compensationc. The compensated pixel is the light of the reconstructed pixel point R, passes through the optical center of the lens unit at the preset position, and corresponds to the pixel on the LCD screen. Calculating the lateral distance x of the compensated pixel by adopting the following formulac：
Figure BDA0002662710740000091
The reconstruction point is usually far from the lens array and much larger than the axial distance error of the lens, i.e. zR＞＞grG then the formula for calculating the lateral distance of the compensated pixel can be simplified as:
Figure BDA0002662710740000092
the corresponding relationship between the positions of the compensated pixel i and the uncompensated pixel j can be obtained according to the following formula:
Figure BDA0002662710740000093
in the formula (I), the compound is shown in the specification,
Figure BDA0002662710740000094
represents the lateral distance, x 'of the compensated pixel i'jRepresenting the lateral distance, n, of the pixel j to be correctedsRepresents the number of pixels of the elemental image to be corrected,
Figure BDA0002662710740000095
indicating a rounding down.
Fig. 4 is a schematic diagram for determining pixel values of compensated pixels according to an embodiment of the present invention, where the pixels in a ghost state in fig. 4 are preset distribution conditions of pixels in an elemental image to be corrected, the pixels in the elemental image after correction are arranged in a discretized manner, and the positions of the pixels are also integers, and correcting the pixels according to a method for updating the pixels to be compensated to nearest neighbors may cause aliasing or non-corresponding pixels after compensation of some pixels in the elemental image after correction, and therefore, rearrangement cannot be performed directly by moving the pixels.
FIG. 4(a) is a schematic diagram of determining the pixel value of the compensated pixel when the actual lateral distance is less than the predetermined lateral distance, as shown in FIG. 4(a), when gr< g, the pixel value for pixel i after actual compensation
Figure BDA0002662710740000096
The compensated ith pixel center is between pixel j and pixel j +1 at the corresponding position in the element image to be corrected, and can be determined according to the pixel value I of pixel j and pixel j +1jAnd Ij+1And obtaining the pixel value of the pixel i by using a linear weighting method, wherein the specific formula is as follows:
Figure BDA0002662710740000101
in formula (II), x'jRepresents the lateral position, x 'of pixel j'j+1Indicating the lateral position of pixel j + 1.
The number of pixels in the compensated elemental image is the same as the number of pixels in the elemental image before compensation. The pixels of which the transverse distance in the compensated element image exceeds the transverse range of the preset element image can be directly assigned with zero.
FIG. 4(b) is a schematic diagram of determining the pixel value of the compensated pixel when the actual lateral distance is greater than the predetermined lateral distance, as shown in FIG. 4(b), when grWhen > g, it is still possible to obtain: the number of pixels in the compensated elemental image is the same as the number of pixels in the elemental image before compensation. The pixels of which the transverse distance in the compensated element image exceeds the transverse range of the preset element image can be directly assigned with zero.
And performing compensation operation on all pixels in the element image to be corrected to obtain a corrected element image for actual display.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.

Claims (8)

1. A method for correcting an elemental image of an integrated imaging three-dimensional display system, the method comprising:
acquiring the number of pixels of an element image to be corrected, a preset axial distance of a lens unit, an actual axial distance of the lens unit and a transverse distance of the pixels to be corrected; the preset axial distance is the distance from the optical center of the lens unit positioned at the preset lens position to the LCD screen; the actual axial distance is the distance from the optical center of the lens unit positioned at the actual lens position to the LCD screen; the transverse distance of the pixel to be corrected is the distance between the pixel to be corrected on the element image to be corrected and the corresponding pixel of the optical center of the lens unit positioned on the preset lens position on the LCD screen;
according to the number of the pixels of the element image to be corrected, the preset axial distance, the actual axial distance and the transverse distance of the pixels to be corrected, compensating the transverse position of the pixels to be corrected by adopting an axial distance error compensation method to obtain the transverse distance of the compensated pixels;
acquiring a pixel value of the pixel to be corrected, a transverse distance between the pixel to be corrected and a pixel adjacent to the pixel to be corrected and a pixel value of the pixel adjacent to the pixel to be corrected;
determining the pixel value of the compensated pixel by adopting an interpolation method according to the transverse distance of the compensated pixel, the pixel value of the pixel to be corrected, the transverse distance of the pixel adjacent to the pixel to be corrected and the pixel value of the pixel adjacent to the pixel to be corrected;
judging whether each pixel of the element image to be corrected is traversed or not to obtain a first judgment result; if the first judgment result is yes, generating a corrected element image according to the pixel values of all the compensated pixels and the transverse distances of all the compensated pixels; and if the first judgment result is negative, updating the pixel to be corrected, determining the transverse distance of the updated pixel to be corrected, and then returning to the step of compensating the transverse position of the pixel to be corrected by adopting an axial distance error compensation method according to the number of the pixels of the element image to be corrected, the preset axial distance, the actual axial distance and the transverse distance of the pixel to be corrected to obtain the transverse distance of the pixel after compensation.
2. The method for correcting the elemental image of the integrated imaging three-dimensional display system according to claim 1, wherein the method for compensating the lateral position of the pixel to be corrected by using an axial distance error compensation method according to the number of pixels of the elemental image to be corrected, the preset axial distance, the actual axial distance and the lateral distance of the pixel to be corrected to obtain the lateral distance of the pixel after compensation, further comprising:
judging whether the transverse distance of the compensated pixel is in a transverse distance set of all pixels in the element image to be corrected or not to obtain a second judgment result;
if the second judgment result is negative, setting the pixel value of the compensated pixel to zero, and executing the step of judging whether each pixel of the element image to be corrected is traversed or not to obtain a first judgment result;
if the second judgment result is yes, executing the step of obtaining the pixel value of the pixel to be corrected, the transverse distance between the pixel to be corrected and the pixel adjacent to the pixel to be corrected and the pixel value of the pixel adjacent to the pixel to be corrected.
3. The method for correcting the elemental image of the integrated imaging three-dimensional display system according to claim 1, wherein the compensating the lateral position of the pixel to be corrected by using an axial distance error compensation method according to the number of pixels of the elemental image to be corrected, the preset axial distance, the actual axial distance, and the lateral distance of the pixel to be corrected to obtain the lateral distance of the pixel after compensation specifically comprises:
the lateral distance of the compensated pixel is determined using the following equation:
Figure FDA0002662710730000021
in the formula:
Figure FDA0002662710730000022
represents the lateral distance, x 'of the compensated pixel i'jRepresents the lateral distance of the pixel j to be corrected, g represents the preset axial distance, grRepresenting the actual axial distance; n issRepresenting the number of pixels of the elemental image to be corrected.
4. The method according to claim 3, wherein the determining the pixel value of the compensated pixel by interpolation according to the lateral distance of the compensated pixel, the pixel value of the pixel to be corrected, the lateral distance of the pixel adjacent to the pixel to be corrected, and the pixel value of the pixel adjacent to the pixel to be corrected comprises:
determining a pixel value of the compensated pixel using the following equation:
Figure FDA0002662710730000023
in the formula (I), the compound is shown in the specification,
Figure FDA0002662710730000024
representing the pixel value of the compensated pixel I, IjRepresenting the pixel value, I, of the pixel j to be correctedj+1Denotes a pixel value, x 'of a pixel j +1 adjacent to the pixel to be corrected'j+1Indicating the lateral position of the pixel j +1 adjacent to the pixel to be corrected.
5. An elemental image correction system for an integrated imaging three-dimensional display system, the system comprising:
the first data acquisition module is used for acquiring the number of pixels of an element image to be corrected, the preset axial distance of the lens unit, the actual axial distance of the lens unit and the transverse distance of the pixels to be corrected; the preset axial distance is the distance from the optical center of the lens unit positioned at the preset lens position to the LCD screen; the actual axial distance is the distance from the optical center of the lens unit positioned at the actual lens position to the LCD screen; the transverse distance of the pixel to be corrected is the distance between the pixel to be corrected on the element image to be corrected and the corresponding pixel of the optical center of the lens unit positioned on the preset lens position on the LCD screen;
the compensated axial distance determining module is used for compensating the transverse position of the pixel to be corrected by adopting an axial distance error compensation method according to the number of the pixels of the element image to be corrected, the preset axial distance, the actual axial distance and the transverse distance of the pixel to be corrected to obtain the transverse distance of the pixel to be corrected;
the second data acquisition module is used for acquiring the pixel value of the pixel to be corrected, the transverse distance between the pixel to be corrected and the pixel adjacent to the pixel to be corrected and the pixel value of the pixel adjacent to the pixel to be corrected;
a compensated pixel value determining module, configured to determine a pixel value of a compensated pixel by using an interpolation method according to a lateral distance of the compensated pixel, a pixel value of the pixel to be corrected, a lateral distance of a pixel adjacent to the pixel to be corrected, and a pixel value of a pixel adjacent to the pixel to be corrected;
the first judgment module is used for judging whether each pixel of the element image to be corrected is traversed or not to obtain a first judgment result; when the first judgment result is yes, executing a corrected element image generation module; when the first judgment result is negative, executing a correction pixel updating module;
the corrected element image generating module is used for generating a corrected element image according to the pixel values of all the compensated pixels and the transverse distances of all the compensated pixels;
the correction pixel updating module is used for updating the pixel to be corrected and executing an updated pixel axial distance determining sub-module;
and the updated pixel axial distance determining submodule is used for determining the updated transverse distance of the pixel to be corrected and executing the compensated axial distance determining module.
6. The elemental image correction system for an integrated imaging three-dimensional display system of claim 5, further comprising:
the second judgment module is used for judging whether the transverse distance of the compensated pixel is in the transverse distance set of all pixels in the element image to be corrected or not to obtain a second judgment result;
when the second judgment result is negative, executing a pixel value zero setting module; when the second judgment result is yes, executing a second data acquisition module;
and the pixel value zero setting module is used for setting the pixel value of the compensated pixel to zero and executing the first judgment module.
7. The elemental image correction system according to claim 5, wherein the post-compensation axial distance determination module comprises:
a compensated axial distance determination submodule for determining the lateral distance of the compensated pixel using the following formula:
Figure FDA0002662710730000041
in the formula:
Figure FDA0002662710730000042
represents the lateral distance, x 'of the compensated pixel i'jRepresents the lateral distance of the pixel j to be corrected, g represents the preset axial distance, grRepresenting the actual axial distance; n issRepresenting the number of pixels of the elemental image to be corrected.
8. The elemental image correction system according to claim 7, wherein the compensated pixel value determining module comprises:
a compensated pixel value determination sub-module for determining the pixel value of the compensated pixel using the following formula:
Figure FDA0002662710730000043
in the formula (I), the compound is shown in the specification,
Figure FDA0002662710730000044
representation compensationPixel value of the rear pixel I, IjRepresenting the pixel value, I, of the pixel j to be correctedj+1Denotes a pixel value, x 'of a pixel j +1 adjacent to the pixel to be corrected'j+1Indicating the lateral position of the pixel j +1 adjacent to the pixel to be corrected.
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