CN117369158A - CMYK coded high-color quasi-static light field display system and coding algorithm - Google Patents
CMYK coded high-color quasi-static light field display system and coding algorithm Download PDFInfo
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- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical 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
- G02B30/26—Optical 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
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Abstract
The invention relates to the technical field of static light field display, and in order to solve the technical problems of complex structure and low color accuracy of the existing static light field display system, the invention discloses a CMYK coded high-color quasi-static light field display system and a coding algorithm, wherein the CMYK coded high-color quasi-static light field display system comprises a light control module and a CMYK light information module loaded with multi-channel light information of multi-viewpoint pictures, the light control module controls the optical path difference of transmitted light beams, periodically regulates and controls the phase change of the light beams, and the light beams are periodically regulated and controlled to different directions by the light control module to form multi-angle light beams; the CMYK optical information module is divided into a CMY color channel optical information sub-module and a K channel optical information sub-module. The two modules are coupled to enable the multi-angle light beams to load corresponding color information and light intensity information, the light beams carrying the light information are intersected in space to form a volume pixel in space, the three-dimensional image point cloud is built by the stacked volume pixel, and the static light field display system with high definition, smooth parallax, high color level and high color quasi is realized.
Description
Technical Field
The invention relates to the technical field of static light field display, in particular to a CMYK coded high-color quasi-static light field display system and a coding algorithm.
Background
Static light field display systems are a display technology for generating realistic visual effects, which are commonly applied in Virtual Reality (VR), augmented Reality (AR), 3D movies, and other interactive media applications. Static light field display systems simulate ray propagation in the real world by creating a complex light field between the user's eyes and the display surface, creating a highly realistic three-dimensional visual effect.
CMYK is a color model that represents Cyan (Cyan), magenta (Magenta), yellow (Yellow), and black (Key, typically black). This model is used to describe that the various colors are generated by mixing different proportions of the basic colors. In image processing, CMYK coding algorithms are used to control the color and color accuracy of the image so that the color can be accurately restored during printing.
However, existing static light field display devices typically use filters to control color, which can result in poor color accuracy of the color static three-dimensional display. In addition, the design of the filter is complex, and thus the structure of the whole system is also complex, which means high cost. Therefore, there is a need to find a more efficient way to improve the color accuracy of color static three-dimensional displays and to reduce the complexity and cost of the system.
Disclosure of Invention
The invention aims to provide a CMYK coded high-color quasi-static light field display system and a coding algorithm, which are used for solving the technical problems of complex structure and low color quasi-existing in the existing static light field display system.
In order to achieve the above purpose, the specific technical scheme of the CMYK coded high-color quasi-static light field display system and the coding algorithm of the invention is as follows:
the CMYK coded high-color quasi-static light field display system comprises a CMYK light information module and a light control module positioned in front of the CMYK light information module, wherein the CMYK light information module is used for loading multichannel light information of a multi-viewpoint picture into the module, the light control module controls the optical path difference of a transmitted light beam and periodically regulates and controls the phase change of the light beam, so that the light beam is periodically regulated and controlled to different directions by the light control module to form multi-angle light beams; the CMYK optical information module is divided into a CMY color channel optical information sub-module and a K channel optical information sub-module. The system couples the two modules, so that the multi-angle light beams load corresponding color information and light intensity information, the light beams carrying the light information at multiple angles are intersected in space to form volume pixels in space, the stacked volume pixels construct three-dimensional image point clouds, continuous perception of three-dimensional images is formed under the condition that the number of the representation voxels is enough, and therefore stereoscopic vision and three-dimensional light field perception of an observer are constructed. The light information large period of the CMYK light information module and the periodic structure unit of the corresponding light control module form a light control unit of the light field display system together.
Further, the CMY color channel optical information sub-module is printed on the membrane substrate by printer ink to form low PPI printing pixel points with different colors, wherein the printing pixel points only contain color information and have no light intensity regulation and control capability; the K channel optical information sub-module forms monochromatic high DPI exposure points by laser exposure, and light intensity control of different areas is realized by arranging the exposure points.
Further, printing pixel points are overlapped through a plurality of inks according to a frequency modulation printing method to form the pixel points, the laser exposure points of the K channel optical information sub-module are black points generated through exposure, development and fixation processes, and the laser exposure points are arranged on the plane of the membrane at will.
Further, the CMY color channel optical information sub-module and the K channel optical information sub-module are attached to both sides of the same film.
Further, the CMY color channel optical information sub-module and the K channel optical information sub-module are respectively attached to two films, and the exposure point medicine film surface of the film where the K channel optical information sub-module is located is tightly attached to the ink surface of the printing pixel of the film where the CMY color channel optical information sub-module is located.
Preferably, the density of printed pixels is greater than or equal to 400PPI and the density of exposure is greater than or equal to 2400DPI.
Further, the light information distribution of the CMY color channel light information sub-module and the K channel light information sub-module are divided into areas according to the periodic structure of the light control module, and the formed divided areas are defined to be large periods;
the light information distribution in each period follows the mapping relation of the volume pixels, namely, the light information distribution in each period is divided into a plurality of period areas along the parallax direction, and the formed divided areas are defined as small periods;
the light information in the small period of the two sub-modules of the CMYK light information module is one angle light information sampled by the light field information of the position, the information in the small period of the CMY color channel light information sub-module is corresponding to the color information of the angle light information, and the information in the small period of the K channel light information sub-module is corresponding to the light intensity information of the angle light information.
Further, the light control module is a transmission type periodic optical structure capable of regulating and controlling the phase change of the light beam and is used for deflecting the incident light beam loaded with light information to a certain angle for emergent;
the type of light control module may be a first type of lens array: a cylindrical lens grating array, a double-layer orthogonal cylindrical lens grating array, a rectangular lens array, a circular lens array, a slit grating array or a diaphragm aperture array, and a composite light control array formed by a plurality of layers of the structures;
the type of the light control module can also be a second type lens array: a micro prism array, a Fresnel mirror array, a super surface super-structured lens array or a super surface nanowire periodic phase regulation array;
if the light control module is a first lens array, natural illumination or side-entering light guide plate light homogenizing backlight or starry LED array light homogenizing backlight is used as a backlight source;
if the light control module is a second lens array, a collimated backlight source is adopted, and the diffusion angle of the collimated backlight source is not more than 10 degrees.
Further, when a cylindrical lens grating array, a slit grating array, a non-orthogonal multilayer cylindrical lens-slit composite grating, a microprism array in a horizontal refraction direction and a microprism array in a vertical refraction direction are selected as a light control module and a super-surface nanowire periodic unidirectional phase regulation array, a body pixel constructed by a light field display system has unidirectional parallax, namely, a periodically distributed light control structure unit can only realize parallax change in a unidirectional direction with a certain included angle in a horizontal direction or a vertical direction or in a direction with the two directions, and the light field display system is named as a single parallax light field display system in the patent;
when a Fresnel lens array, a double-layer orthogonal cylindrical lens grating array, a rectangular lens array, a circular lens array, a super-surface super-structured lens array, a super-surface nanowire periodic multi-directional phase regulation array and the like are selected as a light control module, a voxel constructed by the light field display system has multi-directional parallax, namely parallax change can be realized in a unit of a periodically distributed light control structure in the horizontal and vertical directions at the same time or the parallax direction can be obtained in the horizontal and vertical directions through vector operation, and the light field display system is named as a full parallax light field display system in the patent;
if the light field display system is a single parallax light field display system, the CMYK light information module is preferably: the period width of the light information small period of the CMY color channel light information sub-module is the pixel diameter of the ink point; the cycle width of the light information small cycle of the K channel light information sub-module is the diameter of the exposure point. And the small-period light information in the same large period corresponds to the light information of the three-dimensional image in a certain direction of the position. If the light field display system is a full parallax light field display system, the CMYK light information module is preferably: the small period sizes of the two sub-modules are respectively the printing pixel size of the membrane where the CMY color channel light information sub-module is positioned and the exposure point size of the membrane where the K channel light information sub-module is positioned.
The coding algorithm is applicable to the CMYK optical information module with the system structure, and the optical information distribution of two sub-modules of the CMYK optical information module can be calculated through the coding algorithm, so that the arrangement of an ink printing pixel array and laser exposure points is obtained, and the coding algorithm comprises the following procedures:
step S1, determining parameters of a light control unit, namely determining the large period and the small period of light information of a CMYK light information module in the light control unit and the corresponding periodic structure unit parameters of the light control module, wherein the light control unit size determines the light field sampling precision; the positions of the different light control units determine the positions of the voxel beams to the light control units; the sampling precision of different angles of the light beam is determined by the small period division of the two sub-modules of the CMYK optical information module in the light control unit;
s2, judging the light field sampling precision, judging the spatial frequency and the angular frequency of light field sampling according to the parameters of the light control unit, and providing a parameter basis for light field point cloud decomposition; the light field sampling spatial frequency required by the CMY color channel light field information is consistent with that required by the K channel light field information, and the light field sampling angular resolution required by the K channel light field information is higher than that required by the CMY color channel light field information;
s3, three-dimensional image light field modeling is carried out, and the three-dimensional image to be presented is subjected to light field modeling, so that virtual presentation of continuous three-dimensional images is realized;
s4, decomposing the cloud body pixels of the light field points, and discretizing and sampling the virtual continuous three-dimensional image according to the judgment result of the step S2 to form a body pixel array;
s5, tracking the voxel light beam light control unit, carrying out light beam back tracking on each voxel, and tracking the light beam contained in the voxel to a specific light control unit;
s6, the position of the light beam information is sampled and decomposed, and the light information of the body pixels is mapped into the information of the light beams contained in the light control unit;
s7, decomposing color intensity separation of the light beam, and separating light information of the light beam into color information and intensity information for generating subsequent K-channel light field information and CMY color channel light field information;
s8, generating K channel light field information, separating the information realized in the S7 according to the small period division of the K channel light information sub-module, generating light field information on a plane, and realizing information filling through an exposure point;
and S9, generating light field information of CMY color channels, separating the light field information on a plane according to the small period division of the CMY color channel light information submodule and the information realized in the flow of the step S7, and realizing information filling by printing ink pixels.
The CMYK coded high-color quasi-static light field display system and the coding algorithm provided by the invention have the following advantages:
the light field display system constructs volume pixels (voxels) in the space by controlling light beam information and angle convergence, the stacked volume pixels form a three-dimensional image in the space, human eyes observe the three-dimensional image to obtain multi-angle parallax information, and the brain generates stereoscopic vision to form three-dimensional perception. The smallest periodic unit of the control beam is called a light control unit. The display system consists of two parts, including a CMYK light information module and a light control module. The CMYK optical information module is divided into two sub-modules, namely a CMY color channel optical information sub-module and a K channel optical information sub-module, and multi-channel optical information of the multi-viewpoint picture is loaded in the module; the light control module controls the optical path difference of the transmitted light beam, and periodically regulates and controls the phase change of the light beam, so that the light beam is periodically regulated and controlled to different directions by the light control module, and a multi-angle light beam is formed. The optical structure and the coding method realize a static light field display system with high definition, smooth parallax, high color gradation and high color quasi.
Drawings
FIG. 1 is a schematic diagram of an exemplary embodiment of a CMY color channel light information sub-module, a K channel light information sub-module, and a light control module;
fig. 2 is a layout diagram of a second embodiment of the CMY color channel optical information sub-module, the K channel optical information sub-module, and the light control module provided by the present invention;
fig. 3 is a layout diagram of a CMY color channel optical information sub-module, a K channel optical information sub-module, and a light control module according to a third embodiment of the present invention;
fig. 4 is a layout diagram of a fourth embodiment of the CMY color channel optical information sub-module, the K channel optical information sub-module, and the light control module provided by the present invention;
FIG. 5 is a chart showing the distribution of the period of the sizes of the CMY color channel optical information sub-modules provided by the present invention;
FIG. 6 is a chart showing the distribution of the size period of the K channel optical information sub-module provided by the invention;
fig. 7 is a flow chart of a CMYK encoded high color quasi-static light field algorithm provided by the invention.
In the figure: 10. a CMY color channel light information sub-module; 20. a K channel optical information sub-module; 30. and the light control module.
Description of the embodiments
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention provides a CMYK coded high-color quasi-static light field display system, which comprises a CMYK light information module and a light control module 30, wherein the CMYK light information module is divided into a CMY color channel light information sub-module 10 and a K channel light information sub-module 20, and the CMYK light information module loads multi-channel light information of a multi-view picture into the module; the light control module 30 controls the optical path difference of the transmitted light beam, and periodically regulates and controls the phase change of the light beam, so that the light beam is periodically regulated and controlled to different directions by the light control module 30, and a multi-angle light beam is formed.
The CMY color channel light information sub-module 10, the K channel light information sub-module 20, and the light control module 30 include the following arrangement modes:
referring to fig. 1, the CMY color channel optical information sub-module 10, the K channel optical information sub-module 20, and the light control module 30 are sequentially arranged from back to front, and the CMY color channel optical information sub-module 10 and the K channel optical information sub-module 20 belong to different films.
Referring to fig. 2,K, the channel optical information sub-module 20, the CMY color channel optical information sub-module 10, and the light control module 30 are sequentially arranged from back to front, and the CMY color channel optical information sub-module 10 and the K channel optical information sub-module 20 belong to different films.
Referring to fig. 3, the K-channel optical information sub-module 20, the CMY color channel optical information sub-module 10, and the light control module 30 are sequentially arranged from back to front, and the CMY color channel optical information sub-module 10 and the K-channel optical information sub-module 20 are respectively attached to the front side and the rear side of the same film.
Referring to fig. 4, the CMY color channel optical information sub-module 10, the K channel optical information sub-module 20, and the light control module 30 are sequentially arranged from back to front, and the CMY color channel optical information sub-module 10 and the K channel optical information sub-module 20 are respectively attached to the back side and the front side of the same film.
The CMY color channel optical information sub-module 10 is printed by using common standard printer ink, and the printing ink is attached to the film material to form low PPI printing pixel points with different colors, wherein the printing pixel points only contain color information and have no light intensity regulation capability.
The K-channel optical information sub-module 20 does not contain color information, and uses laser exposure to form monochromatic high DPI exposure spots, so that light intensity control of different areas is realized by arranging the exposure spots. After the periodic light beam phase control of the light control module 30, the light intensity information of the multi-angle light beam is regulated and controlled.
The CMY color channel optical information sub-module 10 and the K channel optical information sub-module 20 may be fabricated on the front and back surfaces of the same film, or may be fabricated on two films separately. If the ink is prepared on two layers of films, the exposure point medicine film surface of the film where the K channel optical information sub-module 20 is positioned is closely attached to the ink surface of the printing pixels of the film where the CMY color channel optical information sub-module 10 is positioned.
The printing ink pixels of the CMY color channel optical information sub-module 10 membrane are provided with pixel points formed by overlapping a plurality of inks according to a frequency modulation printing method; the laser exposure points of the K-channel optical information sub-module 20 are black points generated through exposure, development, fixation and other processes, and the laser exposure points can be arranged in any mode on the plane of the membrane.
The preferred CMYK optical information module should have the characteristics, according to the resolution limit of the human eye: the ink dot pixel density of the color channel light information sub-module is not less than 400ppi, and the exposure dot density of the k channel light information sub-module 20 is not less than 2400DPI.
The light control module 30 is a transmissive periodic optical structure capable of adjusting and controlling the phase change of the light beam, and can deflect the incident light beam loaded with the light information to a certain angle for emitting, and the structure can be a micro prism array, a fresnel mirror array, a cylindrical lens grating array, a double-layer orthogonal cylindrical lens grating array, a rectangular lens array, a circular lens array, a super-surface super-structure lens array, a super-surface nanowire periodic phase adjustment array, a slit grating array or a diaphragm aperture array, a composite grating array formed by multiple layers of the structures, and the like.
The light sources adopted are different according to the different light control structures, and if a cylindrical lens grating array, a double-layer orthogonal cylindrical lens grating array, a rectangular lens array, a circular lens array, a slit grating array, a diaphragm hole array, a composite light control array formed by a plurality of layers of the structures and the like are selected as the light control module 30, backlight schemes such as backlight (depending on natural illumination) or backlight with side-in light guide plates and backlight with light homogenizing function of the star-like LED array can be omitted; if a microprism array, a fresnel mirror array, a super-surface super-structured lens array, and a super-surface nanowire periodic phase control array are selected as the light control module 30, a collimated backlight source, preferably a collimated backlight source having a diffusion angle of not more than 10 ° must be used.
According to the difference of light control structures, the display effect of the finally formed light field is different, if a cylindrical lens grating array, a slit grating array, a non-orthogonal multi-layer cylindrical lens-slit composite grating, a micro prism array in a horizontal refraction direction and a micro prism array in a vertical refraction direction are selected as the light control module 30 and the super-surface nanowire periodic unidirectional phase control array, the body pixels constructed by the light field display system have unidirectional parallax, namely, one periodically distributed light control structure unit can only realize parallax change in a unidirectional direction with a certain included angle in the horizontal direction, the vertical direction or the two directions, and the light field display system is defined as a single parallax light field display system in the invention; when a fresnel lens array, a double-layer orthogonal cylindrical lens grating array, a rectangular lens array, a circular lens array, a super-surface super-structured lens array, a super-surface nanowire periodic multi-directional phase regulation array and the like are selected as the light control module 30, a voxel constructed by the light field display system has multi-directional parallax, namely parallax change can be realized in a unit of a periodically distributed light control structure in the horizontal and vertical directions at the same time or the parallax direction can be obtained in the horizontal and vertical directions through vector operation, and the light field display system is defined as a full parallax light field display system in the invention.
The optical information distribution of both sub-modules of the CMYK optical information module is divided into regions according to the periodic structure of the light control module 30, which is defined as the optical information large period in the present invention. The light information distribution inside each period follows the voxel mapping relationship, i.e. inside each period, the light information distribution is divided into a plurality of period areas along the parallax direction, which are defined as light information small periods in the present invention.
The light information in the small period of the two sub-modules of the CMYK light information module is one angle light information sampled by the light field information of the position, the information in the small period of the CMY color channel light information sub-module 10 corresponds to the color information of the angle light information, and the information in the small period of the K channel light information sub-module 20 corresponds to the light intensity information of the angle light information.
Taking a lenticular lens as an example, the large period and small period of the CMYK optical information module are distributed as shown in fig. 5 and 6, wherein fig. 5 is a size period distribution diagram of the CMY color channel optical information sub-module 10, and fig. 6 is a size period distribution diagram of the K channel optical information sub-module 20.
The period width of the light information small period of the CMY color channel light information submodule 10 is the ink dot pixel diameter; the period width of the light information small period of the K-channel light information sub-module 20 is the exposure spot diameter. And the small-period light information in the same large period corresponds to the light information of the three-dimensional image in a certain direction of the position.
If the light field display system is a full parallax light field display system, the small period sizes of the two sub-modules of the CMYK light information module are the print pixel size of the film where the CMY color channel light information sub-module 10 is located and the exposure dot size of the film where the K channel light information sub-module 20 is located, respectively.
The light information large period of the CMYK light information module and the periodic structure unit of the corresponding light control module 30 together constitute a light control unit of the light field display system in the present invention.
In order to be suitable for the system structure, the invention also provides a coding algorithm of CMYK coded high-color quasi-static light field display, wherein the algorithm flow is used for the processes of light control unit parameter determination, light field sampling precision judgment, three-dimensional image light field modeling, light field point cloud body pixel decomposition, voxel light beam light control unit tracking, light beam information position sampling decomposition, decomposed light beam color intensity separation, K channel light field information generation, CMY color channel light field information generation and the like, and the algorithm flow chart is shown in figure 7.
The method comprises the following specific steps:
step S1, determining parameters of a light control unit: determining detailed parameters of a large period and a small period of light information of a CMYK light information module in a light control unit and a corresponding periodic structure unit of the light control module 30, wherein the size of the light control unit determines light field sampling precision; the positions of the different light control units determine the positions of the voxel beams to the light control units; the two sub-module small period divisions of the CMYK optical information module inside the light control unit determine the sampling precision of different angles of the light beam.
Step S2, judging the light field sampling precision: the spatial frequency and the angular frequency of light field sampling are judged according to the parameters of the light control unit, a parameter basis is provided for light field point cloud decomposition, the light field sampling spatial frequency required by the CMY color channel light field information is consistent with the light field sampling spatial frequency required by the K channel light field information, and the light field sampling angular resolution required by the K channel light field information is higher than that required by the CMY color channel light field information.
Step S3, modeling a three-dimensional image light field: and carrying out light field modeling on the three-dimensional image to be presented, and realizing virtual presentation of continuous three-dimensional images.
S4, decomposing the light field point cloud pixels: and discretizing and sampling the virtual continuous three-dimensional image according to the judgment result of the No. 2 flow to form a body pixel array.
Step S5, tracking by a voxel light beam control unit: and carrying out beam back tracking on each voxel, and tracking the light beam contained in the voxel to a specific light control unit.
S6, beam information position sampling decomposition: the light information of the voxel is mapped into the information of the light beam comprised by the light control unit.
Step S7, separating color intensity of the decomposed light beam: the light information of the light beam is separated into color information and intensity information, so that the light field information of the two subsequent channels is conveniently generated.
S8, generating K-channel light field information: according to the small period division of the K-channel optical information sub-module 20 and the information separation realized in step S7, light field information on a plane is generated, and information filling is realized through an exposure point.
Step S9, generating CMY color channel light field information: according to the small period division of the CMY color channel optical information sub-module 10 and the information separation realized in the step S7 flow, the light field information on the plane is generated, and the information filling is realized by printing ink pixels.
The CMYK coded high-color quasi-static light field display system and the coding algorithm provided by the invention have the following advantages:
the light field display system constructs a volume pixel in a space by controlling light beam information and angle convergence, stacks the volume pixel to form a three-dimensional image in the space, human eyes observe the three-dimensional image to obtain multi-angle parallax information, and the brain generates stereoscopic vision to form three-dimensional perception. The smallest periodic unit of the control beam is called a light control unit. The display system consists of two parts, including a CMYK light information module and a light control module. The CMYK optical information module is divided into two sub-modules, namely a CMY color channel optical information sub-module and a K channel optical information sub-module, and multi-channel optical information of the multi-viewpoint picture is loaded in the module; the light control module controls the optical path difference of the transmitted light beam, and periodically regulates and controls the phase change of the light beam, so that the light beam is periodically regulated and controlled to different directions by the light control module, and a multi-angle light beam is formed. The optical structure and the coding method realize a static light field display system with high definition, smooth parallax, high color gradation and high color quasi.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The CMYK coded high-color quasi-static light field display system is characterized by comprising a CMYK light information module and a light control module (30) positioned in front of the CMYK light information module, wherein the CMYK light information module is used for loading multichannel light information of a multi-viewpoint picture into the module, the light control module (30) is used for controlling the optical path difference of a transmitted light beam and periodically regulating and controlling the phase change of the light beam, so that the light beam is periodically regulated and controlled to different directions by the light control module (30) to form multi-angle light beams; the CMYK optical information module is divided into a CMY color channel optical information sub-module (10) and a K channel optical information sub-module (20).
2. The CMYK coded high color quasi-static light field display system of claim 1, wherein CMY color channel light information sub-modules (10) are printed on the film substrate with printer ink to form low PPI print pixels of different colors, the print pixels containing only color information; the K channel optical information sub-module (20) forms monochromatic high DPI exposure points by laser exposure, and light intensity control of different areas is realized by arranging the exposure points.
3. The CMYK coded high color quasi-static light field display system of claim 2, wherein the printed pixels are superimposed by a plurality of inks according to a frequency modulation printing method to form pixels, the laser exposure points of the K channel light information sub-module (20) are black points generated by exposure, development and fixation processes, and the laser exposure points are arranged randomly on the plane of the film.
4. The CMYK coded high color quasi-static light field display system of claim 1, wherein CMY color channel light information sub-modules (10) and K channel light information sub-modules (20) are attached to both sides of the same film.
5. The CMYK coded high color quasi-static light field display system of claim 2, wherein CMY color channel light information sub-module (10) and K channel light information sub-module (20) are attached to two films respectively, and the exposure spot film surface of the film where the K channel light information sub-module (20) is located is closely attached to the ink surface of the printing pixel of the film where the CMY color channel light information sub-module (10) is located.
6. The CMYK encoded high color quasi-static light field display system of claim 2, wherein the density of printed pixels is greater than or equal to 400PPI and the density of exposure spots is greater than or equal to 2400DPI.
7. The CMYK coded high color quasi-static light field display system of claim 1, wherein the light information distribution of CMY color channel light information sub-module (10) and K channel light information sub-module (20) are all regional divided according to the periodic structure of light control module (30), and the formed divided regions are defined as large period;
inside each period, dividing light information distribution into a plurality of period areas along the parallax direction, and defining the formed divided areas as small periods;
the light information in the small period is an angle light information sampled by the light field information of the position, the information in the small period of the CMY color channel light information sub-module (10) corresponds to the color information of the angle light information, and the information in the small period of the K channel light information sub-module (20) corresponds to the light intensity information of the angle light information.
8. The CMYK-coded high color quasistatic light field display system of claim 1, wherein the light control module (30) is a transmissive periodic optical structure capable of adjusting and controlling the phase change of the light beam, for deflecting the incident light beam loaded with light information to a certain angle for emitting;
the type of light control module (30) may be a first type of lens array: a cylindrical lens grating array, a double-layer orthogonal cylindrical lens grating array, a rectangular lens array, a circular lens array, a slit grating array or a diaphragm aperture array, and a composite light control array formed by a plurality of layers of the structures;
the type of the light control module (30) can also be a second type lens array: a micro prism array, a Fresnel mirror array, a super surface super-structured lens array or a super surface nanowire periodic phase regulation array;
if the light control module (30) is a first lens array, natural illumination or side-entering type light guide plate light homogenizing backlight or a starry LED array light homogenizing backlight is used as a backlight source;
if the light control module (30) is a second type lens array, a collimated backlight source is adopted, and the diffusion angle of the collimated backlight source is not more than 10 degrees.
9. The CMYK coded high color quasi-static light field display system of claim 8, wherein if a lenticular lens grating array, a slit grating array, a non-orthogonal multi-layered lenticular lens-slit composite grating, a micro prism array in horizontal refraction direction, a micro prism array in vertical refraction direction, or a periodic unidirectional phase control array of super surface nanowires is selected as the light control module (30), then the bulk pixel of the light field display system is a single parallax light field display system;
if a Fresnel lens array, a double-layer orthogonal cylindrical lens grating array, a rectangular lens array, a circular lens array, a super-surface super-structured lens array, a super-surface nanowire periodic multi-directional phase regulation array and the like are selected as the light control module (30), the body pixel constructed by the light field display system is a full parallax light field display system;
if the light field display system is a single parallax light field display system, the CMYK light information module is a CMY color channel light information sub-module (10), and the period width of the light information small period is the ink dot pixel diameter; the cycle width of the small cycle of the optical information of the K channel optical information sub-module (20) is the diameter of an exposure point, and the small cycle optical information in the same large cycle corresponds to the optical information of a three-dimensional image in a certain direction of the position;
if the light field display system is a full parallax light field display system, the small period sizes of the CMYK light information modules are the printing pixel size of the membrane where the CMY color channel light information sub-module (10) is located and the exposure point size of the membrane where the K channel light information sub-module (20) is located respectively.
10. The coding algorithm for CMYK coded high-color quasi-static light field display is characterized by comprising the following steps:
step S1, determining parameters of a light control unit, and determining the large period and the small period of light information of a CMYK light information module in the light control unit and the periodic structure unit parameters of the corresponding light control module (30);
s2, judging the light field sampling precision, judging the spatial frequency and the angular frequency of light field sampling according to the parameters of the light control unit, and providing a parameter basis for light field point cloud decomposition;
s3, three-dimensional image light field modeling is carried out, and the three-dimensional image to be presented is subjected to light field modeling, so that virtual presentation of continuous three-dimensional images is realized;
s4, decomposing the cloud body pixels of the light field points, and discretizing and sampling the virtual continuous three-dimensional image according to the judgment result of the step S2 to form a body pixel array;
s5, tracking the voxel light beam light control unit, carrying out light beam back tracking on each voxel, and tracking the light beam contained in the voxel to a specific light control unit;
s6, the position of the light beam information is sampled and decomposed, and the light information of the body pixels is mapped into the information of the light beams contained in the light control unit;
s7, decomposing color intensity separation of the light beam, and separating light information of the light beam into color information and intensity information for generating subsequent K-channel light field information and CMY color channel light field information;
s8, generating K channel light field information, separating the information realized in the S7 according to the small period division of the K channel light information sub-module (20), generating light field information on a plane, and realizing information filling through an exposure point;
and S9, generating light field information of CMY color channels, separating the light field information on a plane according to the small period division of the CMY color channel light information submodule (10) and the information realized in the flow of the step S7, and realizing information filling by printing ink pixels.
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| US20110175936A1 (en) * | 2010-01-18 | 2011-07-21 | Nathan James Smith | Angular dependent pixels for trick view |
| US20120224038A1 (en) * | 2011-03-04 | 2012-09-06 | Alexander Roth | Autostereoscopic Display System |
| CN116047787A (en) * | 2023-03-30 | 2023-05-02 | 深圳臻像科技有限公司 | High-definition color static three-dimensional display system and preparation method |
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| US20110175936A1 (en) * | 2010-01-18 | 2011-07-21 | Nathan James Smith | Angular dependent pixels for trick view |
| US20120224038A1 (en) * | 2011-03-04 | 2012-09-06 | Alexander Roth | Autostereoscopic Display System |
| CN116047787A (en) * | 2023-03-30 | 2023-05-02 | 深圳臻像科技有限公司 | High-definition color static three-dimensional display system and preparation method |
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