CN109448660B - Method, device and storage medium for improving color cast of display visual angle - Google Patents
Method, device and storage medium for improving color cast of display visual angle Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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Abstract
The invention provides a method, equipment and a storage medium for improving color cast of a display visual angle. The method comprises the following steps: acquiring a target partition where a pixel is located, wherein the target partition is obtained by dividing a display area in advance; and performing display compensation on the pixels according to the gamma correction parameters corresponding to the target subareas. The method and the equipment solve the color cast problem of different display visual angles in the display area by adopting different display compensations for the pixel points at different positions, and realize the effect of consistent image impression of all the display visual angles.
Description
Technical Field
The embodiment of the invention relates to the technical field of liquid crystal display, in particular to a method, equipment and a storage medium for improving the color cast of a display visual angle.
Background
Color cast is that in a captured or displayed image, the hue and saturation of a certain color are obviously different from those of a real image. Most of liquid crystal displays use a light emitting diode as a backlight source, and in white light emitted by the liquid crystal display, characteristic wavelengths of red light, green light and blue light are not consistent, so that when a light source is degenerated, the degenerated degrees of the red light, the green light and the blue light are different, and under the condition of different display visual angles, a color cast phenomenon exists, namely when visual angles and positions of observers are different, the display effect of the liquid crystal display is different, images at oblique visual angles are whitened, and as the size of the liquid crystal display is larger and larger, the problem of color cast at different display visual angles is urgently needed to be solved.
The commonly used solution at present is to perform Gamma (Gamma) compensation on the whole lcd, and because the compensation values at various positions of the lcd are consistent, the Gamma correction effect at the direct viewing angle (i.e. the positive viewing angle) and the oblique viewing angle is the same, the color cast problem still exists, which results in inconsistent viewing feeling at various positions of the lcd.
Disclosure of Invention
Embodiments of the present invention provide a method, an apparatus, and a storage medium for improving color shift of display viewing angles, so as to improve the color shift problem of different display viewing angles in the prior art.
In a first aspect, an embodiment of the present invention provides a method for improving color shift of a display viewing angle, including:
acquiring a target partition where a pixel is located, wherein the target partition is obtained by dividing a display area in advance;
and performing display compensation on the pixels according to the gamma correction parameters corresponding to the target subareas.
In one possible design, before the obtaining the target partition where the pixel is located, the method includes:
calibrating the display area according to a plurality of pixel points with known addresses to obtain an address range of the display area;
dividing the address range of the display area to obtain the address range of each target partition;
the obtaining of the target partition where the pixel is located includes:
acquiring the address of a pixel;
and determining the target subarea where the pixel is located according to the address of the pixel and the address range of each target subarea.
In one possible design, the gamma correction parameters include a first gamma for enlarging a gray scale and a second gamma for reducing the gray scale; the performing display compensation on the pixel according to the gamma correction parameter corresponding to the target partition includes:
acquiring an initial gray scale of the pixel, and selecting a first gamma or a second gamma of the target partition as a target gamma correction parameter according to a preset rule;
exponentiation is carried out on the initial gray scale by taking the target gamma correction parameter as an exponent to obtain the display gray scale of the pixel;
and performing display compensation according to the display gray scale of the pixel.
In a possible design, the selecting, according to a preset rule, the first gamma or the second gamma of the target partition as a target gamma correction parameter includes:
and determining a target gamma correction parameter of the pixel according to the previous pixel of the pixel in the row of the pixel in the target partition, wherein the target gamma correction parameter of the pixel is different from that of the previous pixel of the pixel.
In a possible design, the selecting, according to a preset rule, the first gamma or the second gamma of the target partition as a target gamma correction parameter includes:
and if the pixel is the first pixel of the row in which the pixel is located in the target partition, determining a target gamma correction parameter of the pixel according to the first pixel of the previous row of the row in which the pixel is located in the target partition, wherein the target gamma correction parameters of the pixel are different from those of the first pixel of the previous row.
In a second aspect, an embodiment of the present invention provides an apparatus for improving color shift of a display viewing angle, including:
the pixel partition module is used for acquiring a target partition where the pixel is located, wherein the target partition is obtained by dividing a display area in advance;
and the display compensation module is used for performing display compensation on the pixels according to the gamma correction parameters corresponding to the target subareas.
In one possible design, the system further includes an address determination module, specifically configured to:
calibrating the display area according to a plurality of pixel points with known addresses to obtain an address range of the display area;
dividing the address range of the display area to obtain the address range of each target partition;
the pixel partition module is specifically applied to:
acquiring the address of a pixel;
and determining the target subarea where the pixel is located according to the address of the pixel and the address range of each target subarea.
In one possible design, the gamma correction parameters include a first gamma for enlarging a gray scale and a second gamma for reducing the gray scale; the display compensation module is specifically configured to:
acquiring an initial gray scale of the pixel, and selecting a first gamma or a second gamma of the target partition as a target gamma correction parameter according to a preset rule;
exponentiation is carried out on the initial gray scale by taking the target gamma correction parameter as an exponent to obtain the display gray scale of the pixel;
and performing display compensation according to the display gray scale of the pixel.
In a possible design, the display compensation module is specifically configured to determine a target gamma correction parameter of the pixel according to a pixel previous to the pixel in the row of the pixel in the target partition, where the target gamma correction parameter of the pixel is different from the target gamma correction parameter of the pixel previous to the pixel.
In one possible design, the display compensation module is specifically configured to:
and if the pixel is the first pixel of the row in which the pixel is located in the target partition, determining a target gamma correction parameter of the pixel according to the first pixel of the previous row of the row in which the pixel is located in the target partition, wherein the target gamma correction parameters of the pixel are different from those of the first pixel of the previous row.
In a third aspect, an embodiment of the present invention provides an apparatus for improving color shift of a display viewing angle, including: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the method of improving color shift in display viewing angles as set forth in the first aspect and various possible designs of the first aspect above.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where computer-executable instructions are stored, and when a processor executes the computer-executable instructions, a method for improving color shift of a display viewing angle is implemented as described in the first aspect and various possible designs of the first aspect.
According to the method and the device for improving the color cast of the display visual angle, the display area is divided in advance to obtain the target subareas, each target subarea corresponds to a gamma correction parameter, the target subarea where each pixel point is located is obtained, then the gamma correction parameter corresponding to each pixel point is obtained, and the pixels are subjected to display compensation based on the gamma correction parameters, so that the compensation intensities of different areas of the display area are different, and the effect of consistent visual perception of pictures of different visual angles is achieved. The method and the equipment solve the problem of color cast under different display visual angles by adopting different display compensations for the pixel points at different positions, and realize the effect of consistent picture impression under different display visual angles.
Drawings
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 description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a diagram illustrating color shift effect of a display viewing angle in the prior art;
fig. 2 is a first flowchart illustrating a method for improving color shift of a display viewing angle according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a method for improving color shift of a display viewing angle according to an embodiment of the present invention;
fig. 4 is a schematic flowchart illustrating a process of obtaining a target partition address in a method for improving color cast of a display view according to an embodiment of the present invention;
fig. 5 is a schematic flow chart illustrating a process of obtaining a target partition where a pixel is located in the method for improving color cast of a display viewing angle according to the embodiment of the present invention;
FIG. 6 is a block diagram of a target block in the method for improving color shift of a display view according to an embodiment of the present invention;
FIG. 7 is a schematic flow chart illustrating pixel display compensation in a method for improving color shift of a display viewing angle according to an embodiment of the present invention;
FIG. 8 is a second flowchart illustrating a method for improving color shift of a display viewing angle according to an embodiment of the present invention;
FIG. 9 is a diagram illustrating the value of the gamma correction parameter in the Nth region according to the method for improving the color shift of the display viewing angle of the present invention;
FIG. 10 is a first schematic structural diagram illustrating an apparatus for improving color shift of a display viewing angle according to an embodiment of the present invention;
fig. 11 is a schematic diagram of a hardware structure of an apparatus for improving color shift of a display viewing angle according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
Fig. 1 is a diagram illustrating the effect of color shift in the prior art, as shown in fig. 1, when a user is at a position a (a straight viewing angle) and a position B (an oblique viewing angle), the user's appearance is inconsistent, and when the user is at the position B, the image of the liquid crystal display is whitened.
The invention provides a method for improving color cast of a display viewing angle, and fig. 2 is a first schematic flow chart of the method for improving color cast of a display viewing angle provided by the embodiment of the invention, as shown in fig. 2, the method includes:
s201, obtaining a target partition where the pixel is located, wherein the target partition is obtained by dividing a display area in advance.
In this embodiment, the display area is divided in advance to obtain a plurality of target partitions, and optionally, the division of the target partitions may be based on the shape and size of the display area or the observation habit of the user.
Taking the liquid crystal display as an example, the liquid crystal panel is divided into a plurality of areas, so that the target partition where each pixel point on the liquid crystal display is located can be determined.
Alternatively, the address range of the target partition may be preset and stored in the execution main body, or may be divided online according to a division rule input by the user after all addresses of the display area are acquired.
S202, performing display compensation on the pixels according to the gamma correction parameters corresponding to the target partitions.
In practical application, the luminance of the lcd is in a nonlinear relationship with the input voltage, and the final input and output relationship of the signal is a linear relationship through Gamma (Gamma) correction, and the specific calculation method is as follows:
Y＝Xγ
wherein Y is the display brightness of the LCD, X is the output voltage of the execution body, and the power value (gamma) is the gamma value.
It should be understood that the end point of the Gamma Curve is unchanged, i.e. no matter how the Gamma (Gamma) value changes, the output corresponding to 0 is always 0, the output corresponding to 1 is always 1, i.e. the display gray scale corresponding to the input gray scale 0 is 0, and if the input gray scale is 255, the display gray scale is 255.
Each target partition is corresponding to a corresponding gamma correction parameter, so that the output brightness of the same voltage in different target partitions is different, that is, the final display brightness of the pixel points with the same gray scale in different target partitions is different, optionally, the gamma value may be a value greater than 2.2 or a value less than 2.2, so as to realize the amplification or reduction of the gray scale value, further improve the bright-dark display of the display area, and achieve the effect of consistent display effect. It should be understood that the gamma value here is the gamma value of the display, and since the gamma curve of the Cathode Ray Tube (CRT) display is approximately a power law curve with a gamma value of 2.2, the brightness and voltage displayed in the display area are linear when the gamma value is 2.2.
Fig. 3 is a schematic diagram of a method for improving a display view character bias according to an embodiment of the present invention, as shown in fig. 3, an abscissa is an initial gray scale of a pixel, an ordinate is a display gray scale, a value of a first gamma is greater than 2.2, a value of a second gamma is less than 2.2, and brightness of the pixel is adjusted by different values of gamma values of pixel points of different target partitions to improve a color bias problem.
Optionally, the execution main body obtains a display gray scale of the pixel according to the corresponding Gamma (Gamma) correction parameter and the initial gray scale of the pixel, and performs display compensation on the pixel based on the display gray scale. Taking the liquid crystal display as an example, the liquid crystal display comprises a display panel and a time sequence controller, wherein the display area is the display panel of the liquid crystal display, the time sequence controller comprises a time sequence control chip (T-con), and the time sequence control chip (T-con) sends the gray scale value corrected by the gamma correction parameter to the display panel of the liquid crystal display to realize the control of the display gray scale of each pixel point on the display.
According to the method, the target subareas are obtained by pre-dividing the display area, each target subarea corresponds to a gamma correction parameter, the target subarea where each pixel point is located is obtained, then the gamma correction parameter corresponding to each pixel point is obtained, and the pixels are subjected to display compensation based on the gamma correction parameters, so that the compensation intensities of different viewing angles in the display area are different, and the effect of consistent picture impressions at different viewing angles is achieved. The method and the equipment solve the problem of color cast under different display visual angles by adopting different display compensations for the pixel points at different positions, and realize the effect of consistent picture impression under different display visual angles.
Fig. 4 is a schematic flowchart of a process of obtaining a target partition address according to an embodiment of the present invention, where the process includes:
s401, calibrating the display area according to a plurality of pixel points with known addresses, and obtaining the address range of the display area.
S402, dividing the address range of the display area to obtain the address range of each target partition.
Optionally, the address range of the display area is determined according to the coordinates of the pixel points of the plurality of boundary points of the display area.
Optionally, the address division rule of each target partition may be preset, or may be manually input by a user. It should be understood that the address partition corresponds to the partition of the target partition.
Taking the liquid crystal display as an example, the pixel points of the liquid crystal display are sequentially sent to the execution main body, the coordinate location of the first pixel point received by the execution main body is (0,0), the coordinate of the last pixel point is (P, P), the address range of the liquid crystal display area is (0-P ), if the target partition is vertically equally divided into N areas, the address range of the first area is (0-P/N, 0-P), and the address range of the second area is (P/N-2P/N, 0-P). Wherein the pixel points on the first zone and the second zone dividing boundary belong to the first zone.
Fig. 5 is a schematic flowchart of a process of obtaining a target partition where a pixel is located according to an embodiment of the present invention, where the process includes:
s501, obtaining the address of the pixel.
S502, determining the target subarea where the pixel is located according to the address of the pixel and the address range of each target subarea.
In practical application, if the address of each target partition is known, the pixel address is obtained, and then the pixel is matched to the corresponding target partition. Alternatively, the address of the pixel is acquired by a timing control chip (T-con).
As an embodiment of the present invention, before obtaining a target partition where a pixel is located, the method further includes performing vertical division on the display area to obtain each target partition, and fig. 6 is a schematic diagram of target partition division provided in the embodiment of the present invention.
In practical application, the display area is vertically divided in advance to obtain each target partition, each target partition is numbered, and the address range of each target partition is stored in advance in the execution main body.
Optionally, the display area is vertically divided into a plurality of partitions, and the width of the target partition at the center of the display area is greater than the width of the target partitions at the two sides of the display area.
Optionally, the display area is vertically divided into a plurality of partitions, and the larger the area of the display area is, the smaller the widths of the target partitions at two sides of the display area are.
Optionally, the display area is vertically divided into a plurality of partitions, the plurality of target partitions are symmetrically distributed on a center line of the display area, and values of the gamma correction parameters of the symmetrical target partitions are the same. When the user views the display area from the same inclination angle on the left and right sides, the viewed image effect is the same.
As an embodiment of the present invention, the gamma correction parameters include a first gamma for amplifying a gray scale and a second gamma for reducing a gray scale; fig. 7 is a schematic flow chart of pixel display compensation according to the gamma correction parameter corresponding to the target partition, which includes:
s701, acquiring an initial gray scale of the pixel, and selecting a first gamma or a second gamma of the target partition as a target gamma correction parameter according to a preset rule.
S702, exponentiation is carried out on the initial gray scale by taking the target gamma correction parameter as an exponent to obtain a display gray scale of the pixel;
and S703, performing display compensation according to the display gray scale of the pixel.
Alternatively, the initial gray scale of the pixel may be acquired in synchronization with the address of the pixel.
In practical application, a preset gamma correction parameter table corresponding to a pixel point called by a time sequence control chip (T-con) selects a target gamma correction parameter of the pixel point as a first gamma or a second gamma, exponentiation is performed on an initial gray scale of the pixel point by taking the target gamma correction parameter as an exponent to obtain a display gray scale of the pixel, and the time sequence control chip (T-con) sends the display gray scale to a display panel to complete display compensation of the pixel point.
As shown in fig. 3, after the first gamma compensation, the value of the display gray scale is greater than the initial gray scale, and after the second gamma compensation, the value of the display gray scale is less than the initial gray scale. It should be understood that when the initial gray scale is 0, the display gray scale is 0 regardless of whether the target gamma correction parameter is the first gamma or the second gamma, and when the initial gray scale is 255, the display gray scale is 255 regardless of whether the target gamma correction parameter is the first gamma or the second gamma. By setting the two gammas of one target partition, the gray-scale value of the pixel point can be amplified and reduced, so that the image contrast effect is improved, and the color cast problem is further improved.
As an embodiment of the present invention, the selecting the first gamma or the second gamma of the target partition as the target gamma correction parameter according to the preset rule includes determining the target gamma correction parameter of the pixel according to a pixel previous to the pixel in the row of the pixel in the target partition, where the target gamma correction parameter of the pixel is different from the target gamma correction parameter of the pixel previous to the pixel.
In practical application, the addresses of the pixel points and the initial gray scale are read sequentially, so that the executing body can realize the light and shade contrast of the adjacent pixel points by setting different target gamma correction parameters of the pixel and the previous pixel of the pixel. That is, if the target gamma correction parameter of the previous pixel is the first gamma, the target gamma correction parameter of the current pixel is the second gamma, the previous pixel performs gray scale enhancement, the current pixel performs gray scale darkening, and the ideal gamma curve shown in fig. 3 is fitted through the light-dark contrast of the two adjacent pixels to solve the color cast problem.
As an embodiment of the present invention, the selecting, according to a preset rule, a first gamma or a second gamma of the target partition as a target gamma correction parameter includes:
and if the pixel is the first pixel of the row in which the pixel is located in the target partition, determining a target gamma correction parameter of the pixel according to the first pixel of the previous row of the row in which the pixel is located in the target partition, wherein the target gamma correction parameters of the pixel are different from those of the first pixel of the previous row.
Determining the target gamma correction parameters further includes, in the target partition, if the pixel is the first pixel in the row where the pixel is located, determining that the target gamma correction parameters of the pixel are different from those of the first pixel in the previous row, that is, if the pixel is the first pixel in the second row, determining that the value of the target gamma correction parameters of the pixel is different from those of the first pixel in the first row, and if the target gamma correction parameters of the first pixel in the first row are the first gamma, determining that the target gamma correction parameters of the first pixel in the second row are the second gamma. The gray scale opposite compensation of the upper and lower adjacent pixel points is realized, so that the contrast of the image light and shade is improved, and the color cast problem is improved.
In practical application, values of target gamma correction parameters of all pixel points in each target partition and adjacent pixel points in four directions, namely up, down, left and right, are different. In each target partition, the target gamma correction parameters of the pixel points on each line are alternately selected as a first gamma and a second gamma; and the target gamma correction parameters of the first pixel points in two adjacent rows are alternately selected as the first gamma and the second gamma.
Fig. 8 is a second flowchart illustrating a method for improving color shift of a display viewing angle according to an embodiment of the present invention, including:
s801, vertically dividing the display area to obtain each target partition;
s802, acquiring a pixel address and an initial gray scale.
And S803, determining the target partition where the pixel is located according to the address of the pixel and the address range of each target partition.
And S804, determining target gamma correction parameters.
And S805, exponentiating the initial gray scale by the target gamma correction parameter to obtain the display gray scale of the pixel.
S806, performing display compensation according to the display gray scale of the pixel;
s807, judging whether all pixels in the display area complete display compensation, if so, ending the process, and if not, skipping to the step S802 to collect the next pixel point for display compensation.
Optionally, a preset N-region gamma correction parameter table is pre-stored in the execution body in a table manner, where the table includes a target region to which the table belongs, and a first compensation display gray scale and a second compensation display gray scale for each initial gray scale, where the first compensation display gray scale is obtained by first gamma exponentiation for the initial gray scale, and the second compensation display gray scale is obtained by second gamma exponentiation for the initial gray scale.
Optionally, the gamma correction parameters for each target partition may be adjusted.
Optionally, the first compensation display gray scale and the second compensation display gray scale of each target partition may also be preset, as shown in fig. 9, which are compensated display gray scales of the initial gray scales of the nth region. Alternatively, the display gray levels of the initial gray levels not labeled in the table can be obtained by linear difference.
Optionally, the address and the initial gray scale of the pixel point may also be obtained in steps.
The specific operation flow in this embodiment is as follows, dividing the display area vertically to obtain each target partition, storing the address range of each target partition in the time sequence control chip (T-con), the time sequence control chip (T-con) obtaining the address and initial gray scale of the pixel, determining the target partition where the pixel is located according to the address of the pixel, for example, the 1 st partition, the time sequence control chip (T-con) calling the preset gamma correction parameter table of the 1 st partition, selecting the target gamma correction parameter of the pixel as the first gamma, exponentiating the initial gray scale of the pixel by the value of the first gamma to obtain the display gray scale of the pixel, the time sequence control chip (T-con) sending the display gray scale to the display panel first to complete the display compensation of the pixel, then judging whether all the pixels in the display area complete the display compensation, if yes, ending the process, otherwise, collecting the next pixel point for display compensation, and repeating the steps for display compensation until all the pixel points in the display area complete the display compensation.
The determining of the target gamma correction parameters includes that the target gamma correction parameters of the pixel are different from the target gamma correction parameters of the previous pixel of the pixel, that is, if the target gamma correction parameter of the previous pixel is the first gamma, the target gamma correction parameter of the pixel is the second gamma, and vice versa.
Determining the target gamma correction parameters further includes, in the target partition, if the pixel is the first pixel in the row where the pixel is located, determining that the target gamma correction parameters of the pixel are different from those of the first pixel in the previous row, that is, if the pixel is the first pixel in the second row, determining that the value of the target gamma correction parameters of the pixel is different from those of the first pixel in the first row, and if the target gamma correction parameters of the first pixel in the first row are the first gamma, determining that the target gamma correction parameters of the first pixel in the second row are the second gamma. The gray scale of adjacent pixel points is compensated oppositely, so that the contrast effect of the image is improved, and the color cast problem is improved.
Fig. 10 is a schematic structural diagram of an apparatus for improving color shift of a display viewing angle according to an embodiment of the present invention, and as shown in fig. 10, the apparatus 100 for improving color shift of a display viewing angle includes:
1001. and the pixel partition module is used for acquiring a target partition where the pixel is located, wherein the target partition is obtained by pre-dividing the display area.
1002. And the display compensation module is used for performing display compensation on the pixels according to the gamma correction parameters corresponding to the target subareas.
In the present embodiment, the device 100 for improving color shift of display viewing angle divides the display area in advance to obtain a plurality of target partitions, and optionally, the division of the target partitions may be based on the shape and size of the display area or the viewing habits of the user.
Taking the liquid crystal display as an example, the liquid crystal panel is divided into a plurality of areas, so that the target partition where each pixel point on the liquid crystal display is located can be determined.
Optionally, the address range of the target partition may be preset and stored in the execution main body, or may be divided online according to a division rule input by the user after all addresses of the display area are acquired.
Optionally, the display compensation module obtains a display gray scale of the pixel according to the corresponding Gamma (Gamma) correction parameter and the initial gray scale of the pixel, and performs display compensation on the pixel based on the display gray scale. Taking the liquid crystal display as an example, the liquid crystal display comprises a display panel and a time sequence controller, wherein the display area is the display panel of the liquid crystal display, the time sequence controller comprises a time sequence control chip (T-con), and the time sequence control chip (T-con) sends the gray scale value corrected by the gamma correction parameter to the display panel of the liquid crystal display to realize the control of the display gray scale of each pixel point on the display.
The application provides an improve equipment that shows visual angle colour cast obtains the target subregion through dividing in advance the display area, and every target subregion corresponds to there being gamma correction parameter, acquires the target subregion at each pixel point place, and then obtains the corresponding gamma correction parameter of each pixel point, shows the compensation to the pixel based on this gamma correction parameter for the difference of the compensation intensity at the different visual angles of display area, thereby reaches the unanimous effect of different visual angle picture impressions. The equipment adopts different display compensations for the pixel points at different positions, solves the problem of color cast under different display visual angles, and realizes the effect of consistent picture impression under different display visual angles.
As an embodiment of the present invention, the present invention further includes an address determining module 1003, specifically configured to:
calibrating the display area according to a plurality of pixel points with known addresses to obtain an address range of the display area;
dividing the address range of the display area to obtain the address range of each target partition;
optionally, the address determining module 1003 determines the address range of the display area according to the coordinates of the pixel points of the plurality of boundary points of the display area.
Optionally, the address division rule of each target partition may be preset, or may be manually input by a user. It should be understood that the address partition corresponds to the partition of the target partition.
The pixel partition module 1001 is specifically applied to:
acquiring the address of a pixel;
and determining the target subarea where the pixel is located according to the address of the pixel and the address range of each target subarea.
In practical application, the addresses of the target partitions are known, and the pixel partitioning module 1001 may match the pixels to the corresponding target partitions after acquiring the addresses of the pixels.
As an embodiment of the present invention, the display device further includes a target partition dividing module 1004, which is specifically configured to vertically divide the display area to obtain each target partition.
In practical applications, the target partition dividing module 1004 divides the display area vertically in advance to obtain each target partition, numbers each target partition, and stores the address range of each target partition in advance to the execution main body.
Optionally, the target partition dividing module 1004 vertically divides the display area into a plurality of partitions, and the width of the target partition at the center of the display area is greater than the width of the target partitions at the two sides of the display area.
Optionally, the target partition dividing module 1004 vertically divides the display area into a plurality of partitions, and the larger the area of the display area is, the smaller the widths of the target partitions at two sides of the display area are.
Optionally, the target partition dividing module 1004 vertically divides the display area into a plurality of partitions, the plurality of target partitions are symmetrically distributed on a central line of the display area, and values of the gamma correction parameters of the symmetrical target partitions are the same. When the user views the display area from the same inclination angle on the left and right sides, the viewed image effect is the same.
As an embodiment of the present invention, the gamma correction parameters include a first gamma for amplifying a gray scale and a second gamma for reducing a gray scale; the display compensation module 1002 is specifically configured to:
acquiring an initial gray scale of the pixel, and selecting a first gamma or a second gamma of the target partition as a target gamma correction parameter according to a preset rule;
exponentiation is carried out on the initial gray scale by taking the target gamma correction parameter as an exponent to obtain the display gray scale of the pixel;
and performing display compensation according to the display gray scale of the pixel.
In practical applications, the display compensation module 1002 calls a preset gamma correction parameter table corresponding to a pixel point, selects a target gamma correction parameter of the pixel point as a first gamma or a second gamma, exponentiates the initial gray scale of the pixel point by the value of the target gamma correction parameter to obtain the display gray scale of the pixel, and the display compensation module 1002 sends the display gray scale to the display panel to complete the display compensation of the pixel point.
As shown in fig. 3, after the first gamma compensation, the value of the display gray scale is greater than the initial gray scale, and after the second gamma compensation, the value of the display gray scale is less than the initial gray scale. It should be understood that when the initial gray scale is 0, the display gray scale is 0 regardless of whether the target gamma correction parameter is the first gamma or the second gamma, and when the initial gray scale is 255, the display gray scale is 255 regardless of whether the target gamma correction parameter is the first gamma or the second gamma. By setting the two gammas of one target partition, the gray-scale value of the pixel point can be amplified and reduced, so that the image contrast effect is improved, and the color cast problem is further improved.
As an embodiment of the present invention, the display compensation module 1002 is specifically configured to determine a target gamma correction parameter of the pixel according to a pixel previous to the pixel in the row of the pixel in the target partition, where the target gamma correction parameter of the pixel is different from the target gamma correction parameter of the pixel previous to the pixel.
In practical applications, the addresses of the pixels and the initial gray scale are read sequentially, so that the display compensation module 1002 can implement the light-dark contrast of the adjacent pixels by setting the target gamma correction parameters of the pixel to be different from those of the previous pixel of the pixel. That is, if the target gamma correction parameter of the previous pixel is the first gamma, the target gamma correction parameter of the current pixel is the second gamma, the previous pixel performs gray scale enhancement, the current pixel performs gray scale darkening, and the ideal gamma curve shown in fig. 3 is fitted through the light-dark contrast of the two adjacent pixels to solve the color cast problem.
As an embodiment of the present invention, the display compensation module 1002 is specifically configured to:
and if the pixel is the first pixel of the row in which the pixel is located in the target partition, determining a target gamma correction parameter of the pixel according to the first pixel of the previous row of the row in which the pixel is located in the target partition, wherein the target gamma correction parameters of the pixel are different from those of the first pixel of the previous row.
Optionally, in the target partition, if the pixel is the first pixel in the row where the pixel is located, the display compensation module 1002 selects a value different from the target gamma correction parameter of the first pixel in the previous row to be assigned to the target gamma correction parameter of the pixel, that is, if the pixel is the first pixel in the second row, the value of the target gamma correction parameter of the pixel is different from the target gamma correction parameter of the first pixel in the first row, and if the target gamma correction parameter of the first pixel in the first row is the first gamma, the target gamma correction parameter of the first pixel in the second row is the second gamma. The gray scale opposite compensation of the upper and lower adjacent pixel points is realized, so that the contrast of the image light and shade is improved, and the color cast problem is improved.
In practical application, values of target gamma correction parameters of all pixel points and adjacent pixel points in each target partition, including the adjacent pixel points in the upper, lower, left and right directions, are different. In each target partition, the target gamma correction parameters of the pixel points on each line are alternately selected as a first gamma and a second gamma; and the target gamma correction parameters of the first pixel points in two adjacent rows are alternately selected as the first gamma and the second gamma.
As an embodiment of the present invention, the present invention further includes a pixel compensation module, specifically configured to:
vertically dividing the display area to obtain each target subarea;
the pixel address and the initial gray level are obtained.
And determining the target subarea where the pixel is located according to the address of the pixel and the address range of each target subarea.
Target gamma correction parameters are determined.
And performing exponentiation on the initial gray scale by using the target gamma correction parameter to obtain the display gray scale of the pixel.
Performing display compensation according to the display gray scale of the pixel;
and judging whether all pixels in the display area complete display compensation, if so, ending the process, and otherwise, skipping to the step S802 to collect the next pixel point for display compensation.
Optionally, a preset N-region gamma correction parameter table is pre-stored in the execution body in a table manner, where the table includes a target region to which the table belongs, and a first compensation display gray scale and a second compensation display gray scale for each initial gray scale, where the first compensation display gray scale is obtained by first gamma exponentiation for the initial gray scale, and the second compensation display gray scale is obtained by second gamma exponentiation for the initial gray scale.
Optionally, the gamma correction parameters for each target partition may be adjusted.
Optionally, the first compensation display gray scale and the second compensation display gray scale of each target partition may also be preset, and fig. 9 is a display gray scale after compensation of each initial gray scale of the nth partition. Alternatively, the display gray levels of the initial gray levels not labeled in the table can be obtained by linear difference.
Optionally, the address and the initial gray scale of the pixel point may also be obtained in steps.
The specific operation flow in this embodiment is as follows, the pixel compensation module vertically divides the display area to obtain each target partition, pre-stores the address range of each target partition, obtains the address and the initial gray scale of the pixel point, determining the target partition of the pixel according to the address of the pixel, such as the 1 st partition, calling a preset gamma correction parameter table of the 1 st partition, selecting the target gamma correction parameter of the pixel as a first gamma, exponentiating the initial gray scale of the pixel by the value of the first gamma to obtain the display gray scale of the pixel, sending the display gray scale to a display panel to complete the display compensation of the pixel, then, judging whether all the pixels in the display area complete the display compensation, if so, ending the process, otherwise, and collecting the next pixel point to perform display compensation, and repeating the steps to perform display compensation until all the pixel points in the display area complete the display compensation.
Fig. 11 is a schematic diagram of a hardware structure of an apparatus for improving color shift of display viewing angle according to an embodiment of the present invention, and as shown in fig. 11, the apparatus 110 for improving color shift of display viewing angle according to this embodiment includes at least one processor 1101 and a memory 1102. Wherein:
a memory 1102 for storing computer execution instructions;
a processor 1101 for executing the computer executable instructions stored by the memory 1102 to implement the steps performed by the receiving device in the above embodiments. Reference may be made in particular to the description relating to the method embodiments described above.
For a specific implementation process of the processor 1101, reference may be made to the above method embodiments, which implement similar principles and technical effects, and details of this embodiment are not described herein again.
In the embodiment shown in fig. 11, it should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise high speed RAM memory and may also include non-volatile storage NVM, such as at least one disk memory.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The application also provides a computer-readable storage medium, wherein computer-executable instructions are stored in the computer-readable storage medium, and when a processor executes the computer-executable instructions, the method for improving the color cast of the display visual angle is realized.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present application may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit. The unit formed by the modules can be realized in a hardware form, and can also be realized in a form of hardware and a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present application.
The readable storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. Readable storage media can be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary readable storage medium is coupled to the processor such the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the readable storage medium may also reside as discrete components in the apparatus.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A method for improving color shift of a display viewing angle, comprising:
calibrating the display area according to a plurality of pixel points with known addresses to obtain an address range of the display area;
dividing the address range of the display area to obtain the address range of each target partition;
acquiring a target partition where a pixel is located, wherein the target partition is obtained by dividing a display area in advance;
performing display compensation on the pixels according to the gamma correction parameters corresponding to the target subareas;
the obtaining of the target partition where the pixel is located includes:
acquiring the address of a pixel;
determining a target partition where the pixel is located according to the address of the pixel and the address range of each target partition;
the gamma correction parameters comprise a first gamma for amplifying gray scales and a second gamma for reducing the gray scales;
the performing display compensation on the pixel according to the gamma correction parameter corresponding to the target partition includes:
acquiring an initial gray scale of the pixel, and selecting a first gamma or a second gamma of the target partition as a target gamma correction parameter according to a preset rule;
exponentiation is carried out on the initial gray scale by taking the target gamma correction parameter as an exponent to obtain the display gray scale of the pixel;
performing display compensation according to the display gray scale of the pixel;
the selecting the first gamma or the second gamma of the target partition as the target gamma correction parameter according to the preset rule comprises:
and determining a target gamma correction parameter of the pixel according to the previous pixel of the pixel in the row of the pixel in the target partition, wherein the target gamma correction parameter of the pixel is different from that of the previous pixel of the pixel.
2. The method of claim 1, wherein the selecting the first gamma or the second gamma of the target partition as a target gamma correction parameter according to a preset rule further comprises:
and if the pixel is the first pixel of the row in which the pixel is located in the target partition, determining a target gamma correction parameter of the pixel according to the first pixel of the previous row of the row in which the pixel is located in the target partition, wherein the target gamma correction parameters of the pixel are different from those of the first pixel of the previous row.
3. An apparatus for improving color shift in display viewing angles, comprising:
the pixel partition module is used for acquiring a target partition where the pixel is located, wherein the target partition is obtained by dividing a display area in advance;
the display compensation module is used for performing display compensation on the pixels according to the gamma correction parameters corresponding to the target subareas;
the system further comprises an address determination module, specifically configured to:
calibrating the display area according to a plurality of pixel points with known addresses to obtain an address range of the display area;
dividing the address range of the display area to obtain the address range of each target partition;
the pixel partition module is specifically applied to:
acquiring the address of a pixel;
determining a target partition where the pixel is located according to the address of the pixel and the address range of each target partition;
the gamma correction parameters comprise a first gamma for amplifying gray scales and a second gamma for reducing the gray scales; the display compensation module is specifically configured to:
acquiring an initial gray scale of the pixel, and selecting a first gamma or a second gamma of the target partition as a target gamma correction parameter according to a preset rule;
exponentiation is carried out on the initial gray scale by taking the target gamma correction parameter as an exponent to obtain the display gray scale of the pixel;
performing display compensation according to the display gray scale of the pixel;
the display compensation module is specifically configured to determine a target gamma correction parameter of the pixel according to a previous pixel of the pixel in a row of the pixel in the target partition, where the target gamma correction parameter of the pixel is different from the target gamma correction parameter of the previous pixel of the pixel.
4. The device of claim 3, wherein the display compensation module is specifically configured to:
and if the pixel is the first pixel of the row in which the pixel is located in the target partition, determining a target gamma correction parameter of the pixel according to the first pixel of the previous row of the row in which the pixel is located in the target partition, wherein the target gamma correction parameters of the pixel are different from those of the first pixel of the previous row.
5. An apparatus for improving color shift in display viewing angles, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the method of claim 1 or 2.
6. A computer-readable storage medium having computer-executable instructions stored thereon which, when executed by a processor, implement the method of claim 1 or 2.
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| US11222614B1 (en) * | 2020-08-05 | 2022-01-11 | Novatek Microelectronics Corp. | Image processing method, assembly and system with auto-adjusting gamma value |
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Address after: No. 1778, Qinglan Road, Huangjia Street, Shuangliu District, Chengdu, Sichuan 610200 Patentee after: Chengdu BOE Display Technology Co.,Ltd. Country or region after: China Address before: No. 1778, Qinglan Road, Gongxing street, Shuangliu District, Chengdu, Sichuan 610200 Patentee before: CHENGDU ZHONGDIAN PANDA DISPLAY TECHNOLOGY Co.,Ltd. Country or region before: China |