CN114005404A - Segmented correction method and device for processing seam repair hidden line and computer equipment - Google Patents
Segmented correction method and device for processing seam repair hidden line and computer equipment 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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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
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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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
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Abstract
The invention relates to a sectional correction method, a device and computer equipment for processing seam repair hidden lines, wherein the method comprises the following steps: collecting brightness values of the LED box body corresponding to each gray scale respectively to generate a gray scale-brightness nonlinear graph; dividing the gray scale into at least two gray stages according to a gray scale-brightness nonlinear graph, and performing linear or curve fitting according to the gray scale in each gray stage and the brightness value corresponding to the gray scale to respectively obtain a gray scale-brightness fitting equation of each gray stage; and for the to-be-repaired seam lamp point with the gray scale in the low gray scale range, correcting the seam repair correction coefficient of the to-be-repaired seam lamp point according to the gray scale-brightness fitting equation of the gray scale corresponding to the gray stage of the to-be-repaired seam lamp point and the gamma value of the to-be-repaired seam lamp point, and sending the corrected seam repair correction coefficient to the LED display screen to correct the to-be-repaired seam lamp point. The method and the device provided by the invention can improve the seam repair correction effect of the low-gray-scale lamp points, thereby improving the correction effect of the display screen.
Description
Technical Field
The invention relates to the field of display screen correction, in particular to a segmented correction method and device for processing seam-repairing hidden lines and computer equipment.
Background
The LED display screen is generally formed by splicing a plurality of box bodies, each box body is composed of a plurality of modules, and each module is composed of a plurality of modules; the constitution that the aforesaid was mentioned all involves the concatenation, LED display screen after the concatenation was accomplished, intermodule often can appear, between the module, the too big problem of box interunit concatenation gap, and then the pixel interval that leads to appearing the concatenation department is greater than the problem of standard pixel interval, in the demonstration, black seam can appear in concatenation department, can be seen as a black line in effective distance observation, can influence the display effect of LED display screen this moment, and then also can influence user's experience effect.
In view of the above problems, in the prior art, a seam repair correction coefficient of a lamp point (a lamp point to be repaired) at a black line position is calculated, and the lamp point at the black line position is repaired and corrected according to the seam repair correction coefficient, but for a lamp point with a high gray scale, the seam repair effect after the seam repair correction is performed is good, and for a lamp point with a low gray scale, the problem of the black line still appears (the seam repair effect is not good), and the main problem is that when the gray scale of the lamp point is low, the brightness of the lamp point is low, and the seam is more easily observed. Therefore, there is a need for a technical solution to solve the above problems.
Disclosure of Invention
Aiming at the problems, the invention provides a segmented correction method, a segmented correction device and computer equipment for processing a seam repair hidden line, which are used for correcting a seam repair correction coefficient of a low-gray-scale lamp point to be repaired so as to solve the problem of poor seam repair effect of the low-gray-scale lamp point.
The invention provides a sectional correction method for processing seam-repairing hidden lines, which comprises the following steps:
collecting brightness values of the LED box body corresponding to each gray scale respectively to generate a gray scale-brightness nonlinear graph;
dividing the gray scale into at least two gray stages according to a gray scale-brightness nonlinear graph, and performing linear or curve fitting according to the gray scale in each gray stage and the brightness value corresponding to the gray scale to respectively obtain a gray scale-brightness fitting equation of each gray stage;
and for the to-be-repaired seam lamp point with the gray scale in the low gray scale range, correcting the seam repair correction coefficient of the to-be-repaired seam lamp point according to the gray scale-brightness fitting equation of the gray scale corresponding to the gray stage of the to-be-repaired seam lamp point and the gamma value of the to-be-repaired seam lamp point, and sending the corrected seam repair correction coefficient to the LED display screen to correct the to-be-repaired seam lamp point.
Further, if the linear fitting is performed, the linear fitting is performed according to the gray scale in each gray stage and the brightness value corresponding to the gray scale, and the obtaining of the gray scale-brightness fitting equation of each gray stage respectively includes:
a preset linear formula f (x) = a + B x, where x represents a gray scale value, f (x) represents a luminance value, and A, B is a constant;
acquiring a low gray level threshold value, a brightness value corresponding to the low gray level threshold value, a high gray level threshold value and a brightness value corresponding to the high gray level threshold value of each gray stage, wherein the low gray level threshold value and the high gray level threshold value are determined according to a gray level-brightness nonlinear graph;
substituting a low gray level threshold value, a brightness value corresponding to the low gray level threshold value, a high gray level threshold value and a brightness value corresponding to the high gray level threshold value of each gray stage into a preset linear formula, wherein x in the preset linear formula is replaced by the low gray level threshold value and the high gray level threshold value, and calculating to obtain a value of A, B;
the value of A, B is substituted into the linear formula f (x) = a + B × x, and a gray-scale-luminance fitting equation for each gray stage is obtained.
Further, the step of correcting the seam repair correction coefficient of the lamp point to be repaired according to the gray scale-brightness fitting equation of the gray stage corresponding to the gray scale of the lamp point to be repaired and the gamma value of the lamp point to be repaired comprises the following steps:
judging whether the gamma value of the lamp point to be repaired is larger than a preset threshold value or not;
if so, determining that the weighting coefficient of the lamp point to be repaired is 1;
otherwise, taking a gray scale-brightness fitting equation of a gray stage corresponding to the gray scale of the lamp point to be repaired as a correction equation, substituting the gamma value of the lamp point to be repaired into the correction equation, and taking the calculation result as the weighting coefficient of the lamp point to be repaired;
and multiplying the seam repair correction coefficient of the lamp point to be repaired by the weighting coefficient to obtain the corrected seam repair correction coefficient.
Further, the preset threshold value includes a preset red light threshold value, a preset green light threshold value and a preset blue light threshold value;
and when judging whether the gamma value of the lamp point to be repaired is larger than a preset threshold value, selecting a threshold value corresponding to the color of the lamp point to be repaired from a preset red lamp threshold value, a preset green lamp threshold value and a preset blue lamp threshold value, and judging.
Further, the method further comprises: and judging whether a correction instruction of a user is received or not for the to-be-repaired seam lamp point with the gray scale outside the low gray scale range, if so, correcting the seam repair correction coefficient of the to-be-repaired seam lamp point according to a gray scale-brightness fitting equation of the gray scale corresponding to the to-be-repaired seam lamp point and the gamma value of the to-be-repaired seam lamp point.
Further, the method further comprises: when linear or curve fitting is carried out according to the gray scale in each gray stage and the brightness value corresponding to the gray scale, a bessel curve or a B spline is used for smoothing between the adjacent gray stages.
Further, the gamma value of the lamp point to be repaired is the gamma value obtained by looking up a gamma table according to the gray scale of the lamp point to be repaired.
The invention also provides a sectional correction device for processing the seam-repairing hidden line, which comprises an acquisition module, a sectional fitting module and a seam-repairing correction coefficient correction module, wherein:
the acquisition module is connected with the piecewise fitting module and is used for acquiring the brightness values of the LED box body respectively corresponding to the gray scales to generate a gray scale-brightness nonlinear graph;
the segmentation fitting module is connected with the seam repair correction coefficient correction module and is used for dividing the gray scale into at least two gray stages according to the gray scale-brightness nonlinear graph, performing linear or curve fitting according to the gray scale in each gray stage and the brightness value corresponding to the gray scale, and respectively obtaining a gray scale-brightness fitting equation of each gray stage;
and the seam repair correction coefficient correction module is used for correcting the seam repair correction coefficient of the lamp point to be repaired according to the gray scale-brightness fitting equation of the gray stage corresponding to the gray scale of the lamp point to be repaired and the gamma value of the lamp point to be repaired in the low gray scale range, and sending the corrected seam repair correction coefficient to the LED display screen to correct the lamp point to be repaired.
Further, the segment fitting module comprises a segment unit and a fitting unit connected to the segment unit, wherein:
the segmentation unit is used for dividing the gray scale into at least two gray stages according to the gray scale-brightness nonlinear graph;
the fitting unit is used for performing linear or curve fitting according to the gray scale in each gray stage and the brightness value corresponding to the gray scale to respectively obtain a gray scale-brightness fitting equation of each gray stage, and if the linear fitting is performed, the fitting unit obtains a preset linear formula F (x) = A + B x, wherein x represents the gray scale value, F (x) represents the brightness value, and A, B is a constant; acquiring a low gray level threshold value, a brightness value corresponding to the low gray level threshold value, a high gray level threshold value and a brightness value corresponding to the high gray level threshold value of each gray stage, wherein the low gray level threshold value and the high gray level threshold value are determined according to a gray level-brightness nonlinear graph; substituting a low gray level threshold value, a brightness value corresponding to the low gray level threshold value, a high gray level threshold value and a brightness value corresponding to the high gray level threshold value of each gray stage into a preset linear formula, wherein the low gray level threshold value and the high gray level threshold value replace x in the preset linear formula, and calculating to obtain a value of A, B; the value of A, B is substituted into the linear formula f (x) = a + B × x, and a gray-scale-luminance fitting equation for each gray stage is obtained.
The invention also provides computer equipment which comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the segmented correction method for processing the seam-repairing dark lines when executing the computer program.
The invention provides a sectional correction method, a device and computer equipment for processing seam-repairing hidden lines, which at least have the following beneficial effects: the method comprises the steps of acquiring the brightness value of an LED box body under each gray scale in advance to obtain a gray scale-brightness nonlinear graph, dividing the gray scale into at least two gray stages according to the gray scale-brightness nonlinear graph, performing linear or curve fitting according to the gray scale in each gray stage and the brightness value corresponding to the gray scale, obtaining a gray scale-brightness fitting equation of each gray stage, determining a corresponding gray scale-brightness fitting equation according to the gray scale section where the gray scale of the lamp point to be repaired is located for the lamp point to be repaired with the gray scale of the lamp point to be repaired in a low gray scale range, correcting the seam repair correction coefficient of the lamp point to be repaired by combining the gamma value of the lamp point to be repaired, and subsequently correcting the lamp point to be repaired by using the corrected seam repair correction coefficient, so that the problem that the black line problem still stands out after seam repair correction is performed when the gray scale of the lamp point is low, the seam repairing effect is improved, and the display effect of the LED display screen is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart of a sectional trimming method for processing a concealed line during trimming according to an embodiment of the present invention;
FIG. 2 is a gray scale-luminance non-linear graph according to an embodiment of the present invention;
FIG. 3 is a first diagram illustrating a line after fitting a piecewise straight line in an embodiment of the present invention;
FIG. 4 is a second schematic diagram of a line after fitting a piecewise straight line in one embodiment of the present invention;
FIG. 5 is a flowchart illustrating a correction coefficient for repairing a gap between lamp points to be repaired according to an embodiment of the present invention;
FIG. 6 is a flowchart of a sectional trimming method for processing a concealed line during trimming according to another embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a segment correction device for processing hidden lines during seam repair according to an embodiment of the present invention;
FIG. 8 is a block diagram of a piecewise fitting module according to an embodiment of the present invention;
FIG. 9 is a diagram illustrating a computer device according to an embodiment of the present invention.
701-acquisition module, 702-segmentation fitting module, 703-seam correction coefficient correction module, 7021-segmentation unit, 7022-fitting unit, 9-computer equipment, 901-processor, 902-memory and 903-communication bus.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In one embodiment of the invention, the invention provides a segmented correction method for processing seam-repair hidden lines. As shown in fig. 1, the method comprises the steps of:
step S101: and acquiring the brightness values of the LED box body respectively corresponding to the gray scales to generate a gray scale-brightness nonlinear graph.
Specifically, the brightness values of the LED box body corresponding to the gray scales can be collected through the light gun in the step. Further, the brightness value mentioned in this step is an average brightness value of the LED box.
More specifically, in an implementation manner, the gray scale range in this step is 0 to 255, and 256 gray scales are total, and the luminance values of the LED box corresponding to the respective gray scales are collected, that is, the luminance values of the LED box corresponding to the 256 gray scales are collected.
As shown in fig. 2, a gray scale value is used as an abscissa and a luminance value is used as an ordinate, and a gray scale-luminance nonlinear graph is obtained according to the collected gray scale and the luminance value data corresponding to the gray scale.
Step S102: dividing the gray scale into at least two gray stages according to the gray scale-brightness nonlinear graph, and performing linear or curve fitting according to the gray scale in each gray stage and the brightness value corresponding to the gray scale to respectively obtain a gray scale-brightness fitting equation of each gray stage.
Specifically, the gray scale is divided into at least two gray stages, a plurality of gray stages can be determined according to a plurality of change trends and/or actual requirements in the gray scale-brightness nonlinear graph by using the existing data analysis tool, and then each gray stage is fitted; alternatively, the gray scale can be divided into at least two gray stages by the skilled person according to a plurality of variation trends in the gray scale-luminance non-linear diagram and/or the actual requirements.
More specifically, the above-mentioned actual requirement refers to the display quality requirement of the display screen, and the higher the display quality requirement is, the more the number of gray stages should be divided. In this step, the gray scale may be divided into two gray stages, or the gray scale may be divided into three or more gray stages, which is not limited in the present invention.
In one implementation, if the straight line fitting is performed, the fitting may be performed according to a preset linear formula f (x) = a + B × x, where x represents a gray scale value, f (x) represents a brightness value, and A, B is a constant.
And acquiring a low gray level threshold value, a brightness value corresponding to the low gray level threshold value, a high gray level threshold value and a brightness value corresponding to the high gray level threshold value of each gray stage.
The low gray level threshold value and the high gray level threshold value of each gray level are determined when the gray level is divided into at least two gray levels according to the gray level-brightness nonlinear graph, wherein the low gray level threshold value of each gray level refers to the minimum gray level value of the gray level section, and the high gray level value of each gray level refers to the maximum gray level value of the gray level section.
The low gray level Threshold value of each gray stage is recorded as Threshold _ low, the high gray level Threshold value is recorded as Threshold _ high, the brightness value corresponding to the low gray level Threshold value is Weight _ low, and the brightness value corresponding to the high gray level Threshold value is Weight _ high, then the brightness values corresponding to the low gray level Threshold value, the high gray level Threshold value and the high gray level Threshold value are substituted into a linear formula f (x) = a + B x, wherein the Threshold values (the low gray level Threshold value and the high gray level Threshold value) are substituted for x in the formula, and the brightness value is substituted for f (x) in the formula, so as to obtain the following formula:
A+B*threshold_low=Weight_low（1）；
A+B*threshold_high=Weight_high（2）；
solving the equations by the formulas (1) and (2) to obtain
B=(Weight_high-Weight_low)/（threshold_high-threshold_low）；
A=Weight_low-threshold_low*B；
A=Weight_low-threshold_low*(Weight_high-Weight_low)/（threshold_high-threshold_low）；
After the above process, the value of the constant A, B is obtained by calculation, and the value A, B is substituted into the linear formula f (x) = a + B × x, so as to obtain the gray scale-luminance fitting equation of each gray stage.
In another implementation, curve fitting may also be performed, and similarly, when curve fitting is performed, according to a preset curve equation, for example, a 2-order curve equation or a higher-order curve equation, taking the 2-order curve equation as an example, f (x) = a + B x + C x, 2 gray scale threshold values (low gray scale threshold value, high gray scale threshold value) and luminance values corresponding to the 2 gray scale threshold values in the gray phase, and any one gray scale except the gray scale threshold values (low gray scale threshold value, high gray scale threshold value) and the luminance value corresponding to the gray scale in the gray phase may be obtained, so that the values are substituted into f (x) = a + B x + C x to obtain the value of A, B, C.
It should be understood that the higher the number of times of using x, for an FPGA (Field Programmable Gate Array), although the FPGA occupies too many resources, the fitting capability is strong, and the fitted line segment will be closer to the real brightness curve.
As shown in fig. 3 and 4, the graphs are linear graphs corresponding to gray scale segments obtained by linear fitting of fig. 2, wherein fig. 3 divides the gray scale into 2 gray stages, and fig. 4 divides the gray scale into 3 gray stages.
As shown in fig. 3 and 4, the smaller the gray scale (corresponding to the abscissa), the larger the calculated weighting coefficient (corresponding to the ordinate), so that after the seam repair correction coefficient is corrected by using the weighting coefficient, the larger the corrected seam repair correction coefficient is, thereby improving the luminance value of the low-gray-scale seam to-be-repaired lamp point, enhancing the seam repair correction effect of the low-gray-scale seam to-be-repaired lamp point, and further improving the display effect of the LED display screen.
Step S103: and for the to-be-repaired seam lamp point with the gray scale in the low gray scale range, correcting the seam repair correction coefficient of the to-be-repaired seam lamp point according to the gray scale-brightness fitting equation of the gray scale corresponding to the gray stage of the to-be-repaired seam lamp point and the gamma value of the to-be-repaired seam lamp point, and sending the corrected seam repair correction coefficient to the LED display screen to correct the to-be-repaired seam lamp point.
Specifically, in this step, the low gray scale range may be preset by a technician, taking the gray scale range of 0-255 as an example, the technician may preset 0-25% of the gray scale as the low gray scale, that is, the low gray scale range is 0-63, and the high gray scale range is 64-255.
It should be understood that, before this step, it is necessary to determine whether the gray scale of the lamp point to be repaired is within the low gray scale range, and the operation in step S103 is performed on the lamp point to be repaired whose gray scale is within the low gray scale range.
More specifically, in this step, the seam repair correction coefficient of the lamp point to be repaired is calculated in advance according to the conventional seam repair correction method in the prior art, but since the seam repair correction coefficient calculated by the conventional seam repair correction method in the prior art has a poor seam repair effect, especially for the lamp point with a low gray scale, in this step, the seam repair correction coefficient of the lamp point to be repaired with a low gray scale needs to be corrected.
In one implementation, as shown in fig. 5, when it is determined that the gray scale of the lamp point to be repaired is within the low gray scale range, the step of modifying the repair correction coefficient of the lamp point to be repaired according to the gray scale-luminance fitting equation of the gray stage corresponding to the gray scale of the lamp point to be repaired and the gamma value of the lamp point to be repaired includes the following steps:
step S501: and judging whether the gamma value of the lamp point to be repaired is larger than a preset threshold value, if so, executing the step S502, otherwise, executing the step S503.
Specifically, in this step, the gamma value of the lamp point to be repaired is obtained by looking up the gamma table according to the gray scale of the lamp point to be repaired.
More specifically, the technician may preset a gamma table according to the screen condition and the requirement, where each gray scale in the gamma table may have a certain gamma value for adjusting the display effect of the display screen. When the gamma value of the lamp point to be repaired is required to be obtained, the image displayed by the LED box body can be obtained firstly, then the gray scale value of the lamp point to be repaired is determined according to the image, and then the corresponding gamma value is found in the gamma table according to the gray scale value of the lamp point to be repaired.
The preset threshold is preset by the technician according to the requirement, and the invention is not limited to this.
Step S502: and determining the weighting coefficient of the lamp point to be repaired to be 1.
Step S503: and taking a gray scale-brightness fitting equation of a gray stage corresponding to the gray scale of the lamp point to be repaired as a correction equation, substituting the gamma value of the lamp point to be repaired into the correction equation, and taking the calculation result as the weighting coefficient of the lamp point to be repaired.
Specifically, taking the gray scale-luminance fitting equation f (x) = a + B × x as an example, the gamma value of the lamp point to be repaired is substituted into the above equation (the value of A, B is already obtained in step S102) as the independent variable x, and the calculated f (x) is the weighting coefficient of the lamp point to be repaired.
If the gray scale-brightness fitting equation is a 2-order curve equation f (x) = a + B x + C x, then, similarly, the gamma value of the lamp point to be repaired is substituted into the above equation (the value of A, B, C is already found in step S102) using the gamma value as the independent variable x, and the calculated f (x) is the weighting coefficient of the lamp point to be repaired.
Step S504: and multiplying the seam repair correction coefficient of the lamp point to be repaired by the weighting coefficient to obtain the corrected seam repair correction coefficient.
In the embodiment, the brightness value of the LED box body under each gray scale is collected in advance to obtain a gray scale-brightness nonlinear graph, the gray scale is divided into at least two gray stages according to the gray scale-brightness nonlinear graph, linear or curve fitting is carried out according to the gray scale in each gray stage and the brightness value corresponding to the gray scale, a gray scale-brightness fitting equation of each gray stage is obtained, for the lamp point to be sewn with the gray scale in the low gray scale range, a corresponding gray scale-brightness fitting equation is determined according to the gray scale section where the gray scale of the lamp point to be sewn is located, the seam correction coefficient of the lamp point to be sewn is corrected by combining the gamma value of the lamp point to be sewn, the seam correction coefficient after correction is subsequently utilized to correct the lamp point to be sewn, and therefore the problem that the black line problem still appears after seam correction is carried out when the gray scale of the lamp point is the low gray scale is solved, the seam repairing effect is improved, and the display effect of the LED display screen is further improved.
Further, in step S102, after the value of the constant A, B is calculated, the following expression may be adopted for the upper computer software:
(1) a and B are represented by complement codes, wherein A is a 1-bit integer and a 7-bit decimal; b is 1-bit symbol, 23-bit decimal;
(2) a is issued by 0x 85; (Upper machine issuing)
(3) B23: 16 by 0x84, B15: 8 by 0x86, B7: 0 by 0x 87; (Upper machine issuing)
(4) The threshold value is currently borrowed for seam repairing and low ash; enabling the used seam repair low ash;
（5）B=-(A-1.0)/（maxGamma）；
(6) the gamma value corresponding to the 63 gray scale is 63 × 4=0XD2= 210;
furthermore, the values (i.e. weighting coefficients) of the FPGA implementation (a + B x) are typically between 0 and 2 (for FPGA, the FPGA is the receiver card)
(1) Take A as 1.7 for example; 1bit sign bit, 4bit integer and 8bit decimal, namely, 4 0 is added to the high bit and 10 is added to the low bit;
(2) BxG = B x is 1-bit sign bit, 16-bit integer, 23-bit decimal, and needs to be arranged into 1-bit sign bit, 4-bit integer, 8-bit decimal; thus, the decimal 15bit is removed, the highest bit is removed, the data taken is BXG [27:15],
(3) a + B X is 1bit sign bit, 4bit integer, 8bit Fract; this number should be a positive number; we just need to take 1bit positive number and 8bit decimal number.
In an implementation manner of the present invention, after the upper computer calculates the value A, B, the upper computer sends a + B x to the receiving card of the LED box according to the above representation manner, the receiving card makes the value (i.e., the weighting coefficient) found by a + B x between 0 and 2 according to the actual situation, and the receiving card corrects the seam correction coefficient of the seam lamp point to be repaired according to the found weighting coefficient, so as to obtain the corrected seam correction coefficient of the seam lamp point to be repaired.
In yet another embodiment of the present invention, the preset threshold values include a preset red light threshold value (R _ threshold), a preset green light threshold value (G _ threshold), and a preset blue light threshold value (B _ threshold).
And when judging whether the gamma value of the lamp point to be repaired is larger than a preset threshold value, selecting a threshold value corresponding to the color of the lamp point to be repaired from a preset red lamp threshold value, a preset green lamp threshold value and a preset blue lamp threshold value, and judging.
Taking the slit lamp point to be repaired as a red lamp point as an example, when judging whether the gamma value of the slit lamp point to be repaired is larger than a preset threshold value, selecting a preset red lamp threshold value from a preset red lamp threshold value, a preset green lamp threshold value and a preset blue lamp threshold value, and judging whether the gamma value of the slit lamp point to be repaired is larger than the preset red lamp threshold value.
In another embodiment of the present invention, as shown in fig. 6, the segmented correction method for processing the seam-repairing hidden line further includes the following steps:
step S104: and judging whether a user correction instruction is received or not for the to-be-repaired lamp point with the gray scale outside the low gray scale range, if so, executing the step S105, and otherwise, executing the step S106.
In this step, the user can determine whether to modify the seam repair correction coefficient for the lamp point to be repaired with the gray scale outside the low gray scale range according to the actual situation, and if so, issue a user modification instruction.
Step S105: and correcting the seam repair correction coefficient of the lamp point to be repaired according to the gray scale-brightness fitting equation of the gray stage corresponding to the gray scale of the lamp point to be repaired and the gamma value of the lamp point to be repaired, and sending the corrected seam repair correction coefficient to the LED display screen to correct the lamp point to be repaired.
Similarly, in this step, the seam repair correction coefficient of the seam repair lamp point to be repaired is corrected according to the gray scale-brightness fitting equation of the gray stage corresponding to the gray scale of the seam repair lamp point to be repaired and the gamma value of the seam repair lamp point to be repaired, and the method includes:
and taking a gray scale-brightness fitting equation of a gray stage corresponding to the gray scale of the lamp point to be repaired as a correction equation, substituting the gamma value of the lamp point to be repaired into the correction equation, and taking the calculation result as the weighting coefficient of the lamp point to be repaired.
Specifically, taking a gray scale-brightness fitting equation f (x) = a + B x as an example, the gamma value of the lamp point to be repaired is used as an independent variable x, and is substituted into the above equation, and the calculated f (x) is the weighting coefficient of the lamp point to be repaired.
And multiplying the seam repair correction coefficient of the lamp point to be repaired by the weighting coefficient to obtain the corrected seam repair correction coefficient.
Step S106: and finishing the correction.
In this embodiment, for a lamp point to be slit-repaired with a gray scale outside the low gray scale range, a user determines whether the slit-repair correction coefficient of the lamp point needs to be corrected according to needs, thereby further improving the slit-repair correction effect.
In another embodiment of the present invention, the piecewise correction method for processing the seam-repairing dark line further includes performing smoothing processing between adjacent gray stages by using a bessel curve or a B-spline when performing straight line or curve fitting according to the gray scale in each gray stage and the brightness value corresponding to the gray scale.
Further, in order to ensure a smooth transition of each gray stage, when performing linear or curved line fitting on each gray scale segment, it is necessary to ensure that the luminance values at the connection point position between two adjacent gray stages are equal.
In another embodiment of the present invention, as shown in fig. 7, the present invention further provides a segmented correction apparatus for processing a seam-repairing dark line, the apparatus includes an acquisition module 701, a segmented fitting module 702, and a seam-repairing correction coefficient correction module 703, wherein:
the acquisition module 701 is connected with the piecewise fitting module 702 and is used for acquiring brightness values of the LED box body corresponding to each gray scale to generate a gray scale-brightness nonlinear graph;
the segmentation fitting module 702 is connected with the seam repair correction coefficient modification module 703 and is configured to divide the gray scale into at least two gray stages according to the gray scale-brightness nonlinear graph, perform linear or curve fitting according to the gray scale in each gray stage and the brightness value corresponding to the gray scale, and obtain a gray scale-brightness fitting equation of each gray stage respectively;
the seam repair correction coefficient modification module 703 is configured to modify a seam repair correction coefficient of a to-be-repaired lamp point for which a gray scale is within a low gray scale range according to a gray scale-brightness fitting equation of a gray stage corresponding to the gray scale of the to-be-repaired lamp point and a gamma value of the to-be-repaired lamp point, and send the modified seam repair correction coefficient to the LED display screen to correct the to-be-repaired lamp point.
Further, in another embodiment of the present invention, as shown in fig. 8, segment fitting module 502 includes a segment unit 7021 and a fitting unit 7022 connected to segment unit 7021, wherein:
a segmentation unit 7021 configured to divide the gray scale into at least two gray stages according to a gray scale-luminance nonlinear graph;
the fitting unit 7022 is configured to perform linear or curve fitting according to the gray scale in each gray stage and the luminance value corresponding to the gray scale, so as to obtain a gray scale-luminance fitting equation of each gray stage, and if the linear fitting is performed, the fitting unit obtains a preset linear formula f (x) = a + B x, where x represents a gray scale value, f (x) represents a luminance value, and A, B is a constant; acquiring a low gray level threshold value, a brightness value corresponding to the low gray level threshold value, a high gray level threshold value and a brightness value corresponding to the high gray level threshold value of each gray stage, wherein the low gray level threshold value and the high gray level threshold value are determined according to a gray level-brightness nonlinear graph; substituting the low gray level threshold value, the brightness value corresponding to the low gray level threshold value, the high gray level threshold value and the brightness value corresponding to the high gray level threshold value of each gray stage into a preset linear formula, wherein x in the preset linear formula is replaced by the low gray level threshold value and the high gray level threshold value, and calculating to obtain a value of A, B; the value of A, B is substituted into the linear formula f (x) = a + B × x, and a gray-scale-luminance fitting equation for each gray stage is obtained.
The present invention also provides a computer device 9, as shown in fig. 9, including: the processor 901 and the memory 902, the processor 901 and the memory 902 being interconnected and communicating with each other via a communication bus 903 and/or other form of connection mechanism (not shown), the memory 902 storing a computer program executable by the processor 901, the processor 901 executing the computer program when the computing device is running to perform the method in any of the alternative implementations of the embodiments described above.
The invention provides a sectional correction method, a device and computer equipment for processing seam-repairing dark lines, which are used for acquiring the brightness value of an LED box body under each gray scale in advance to obtain a gray scale-brightness nonlinear graph, dividing the gray scale into at least two gray stages according to the gray scale-brightness nonlinear graph to obtain a gray scale-brightness fitting equation of each gray stage, determining a corresponding gray scale-brightness fitting equation according to the gray scale section where the gray scale of a lamp point to be repaired is located for the lamp point to be repaired with the gray scale in the low gray scale range, correcting the seam-repairing correction coefficient of the lamp point to be repaired by combining the gamma value of the lamp point to be repaired, and subsequently correcting the lamp point to be repaired by using the corrected seam-repairing correction coefficient, thereby solving the problem that the black line problem still stands out after seam-repairing correction when the gray scale of the lamp point is low, and improving the seam-repairing effect, and further improve the display effect of the LED display screen.
The terms and expressions used in the specification of the present invention have been set forth for illustrative purposes only and are not meant to be limiting. It will be appreciated by those skilled in the art that changes could be made to the details of the above-described embodiments without departing from the underlying principles thereof. The scope of the invention is, therefore, indicated by the appended claims, in which all terms are intended to be interpreted in their broadest reasonable sense unless otherwise indicated.
Claims (10)
1. A segmented correction method for processing seam-repairing hidden lines is characterized by comprising the following steps:
collecting brightness values of the LED box body corresponding to each gray scale respectively to generate a gray scale-brightness nonlinear graph;
dividing the gray scale into at least two gray stages according to the gray scale-brightness nonlinear graph, and performing linear or curve fitting according to the gray scale in each gray stage and the brightness value corresponding to the gray scale to respectively obtain a gray scale-brightness fitting equation of each gray stage;
and for the to-be-repaired seam lamp point with the gray scale in the low gray scale range, correcting the seam repair correction coefficient of the to-be-repaired seam lamp point according to the gray scale-brightness fitting equation of the gray scale corresponding to the gray stage of the to-be-repaired seam lamp point and the gamma value of the to-be-repaired seam lamp point, and sending the corrected seam repair correction coefficient to an LED display screen to correct the to-be-repaired seam lamp point.
2. The sectional correction method for processing the seam-repairing dark line as claimed in claim 1, wherein if performing the straight line fitting, performing the straight line fitting according to the gray scale in each gray stage and the corresponding brightness value of the gray scale, and respectively obtaining the gray scale-brightness fitting equation of each gray stage comprises:
a preset linear formula f (x) = a + B x, where x represents a gray scale value, f (x) represents a luminance value, and A, B is a constant;
acquiring a low gray scale threshold value, a brightness value corresponding to the low gray scale threshold value, a high gray scale threshold value and a brightness value corresponding to the high gray scale threshold value of each gray stage, wherein the low gray scale threshold value and the high gray scale threshold value are determined according to the gray scale-brightness nonlinear graph;
substituting the low gray scale threshold value, the brightness value corresponding to the low gray scale threshold value, the high gray scale threshold value and the brightness value corresponding to the high gray scale threshold value of each gray stage into the preset linear formula, wherein x in the preset linear formula is replaced by the low gray scale threshold value and the high gray scale threshold value, and calculating to obtain a value of A, B;
the value of A, B is substituted into the linear formula f (x) = a + B × x, and a gray-scale-luminance fitting equation for each gray stage is obtained.
3. The sectional modification method for processing the seam repair dark line according to claim 1, wherein the modifying the seam repair correction coefficient of the seam repair lamp point according to the gray scale-brightness fitting equation of the gray stage corresponding to the gray scale of the seam repair lamp point and the gamma value of the seam repair lamp point comprises:
judging whether the gamma value of the lamp point to be repaired is larger than a preset threshold value or not;
if so, determining the weighting coefficient of the to-be-repaired seam lamp point to be 1;
otherwise, taking a gray scale-brightness fitting equation of a gray stage corresponding to the gray scale of the to-be-repaired seam lamp point as a correction equation, substituting the gamma value of the to-be-repaired seam lamp point into the correction equation, and taking a calculation result as a weighting coefficient of the to-be-repaired seam lamp point;
and multiplying the seam repair correction coefficient of the lamp point to be repaired by the weighting coefficient to obtain the corrected seam repair correction coefficient.
4. The sectional correction method for processing the seam repair dark line according to claim 3, wherein the preset threshold comprises a preset red light threshold, a preset green light threshold and a preset blue light threshold;
and when judging whether the gamma value of the to-be-repaired seam lamp point is larger than a preset threshold value, selecting a threshold value corresponding to the color of the to-be-repaired seam lamp point from the preset red lamp threshold value, the preset green lamp threshold value and the preset blue lamp threshold value, and judging.
5. The segmented correction method for processing the seam-repair hidden line according to claim 1, characterized in that the method further comprises:
and judging whether a correction instruction of a user is received or not for the to-be-repaired seam lamp point with the gray scale outside the low gray scale range, if so, correcting the seam repair correction coefficient of the to-be-repaired seam lamp point according to a gray scale-brightness fitting equation of the gray scale corresponding to the to-be-repaired seam lamp point and the gamma value of the to-be-repaired seam lamp point.
6. The segmented correction method for processing the seam-repair hidden line according to claim 1, characterized in that the method further comprises:
when linear or curve fitting is carried out according to the gray scale in each gray stage and the brightness value corresponding to the gray scale, a bessel curve or a B spline is used for smoothing between the adjacent gray stages.
7. The sectional correction method for processing the seam-repairing dark line as claimed in claim 1, wherein the gamma value of the lamp point to be repaired is obtained by looking up a gamma table according to the gray scale of the lamp point to be repaired.
8. The utility model provides a handle segmentation correcting unit who repaiies seam dark line which characterized in that, the device includes collection module, segmentation fitting module and repaiies seam correction coefficient correction module, wherein:
the acquisition module is connected with the piecewise fitting module and is used for acquiring the brightness values of the LED box body respectively corresponding to each gray scale to generate a gray scale-brightness nonlinear graph;
the segmentation fitting module is connected with the seam repair correction coefficient correction module and is used for dividing the gray scale into at least two gray stages according to the gray scale-brightness nonlinear graph, and performing linear or curve fitting according to the gray scale in each gray stage and the brightness value corresponding to the gray scale to respectively obtain a gray scale-brightness fitting equation of each gray stage;
the seam repair correction coefficient correction module is used for correcting the seam repair correction coefficient of the seam repair lamp point to be repaired according to a gray scale-brightness fitting equation of a gray stage corresponding to the gray scale of the seam repair lamp point to be repaired and the gamma value of the seam repair lamp point to be repaired, and sending the corrected seam repair correction coefficient to the LED display screen to correct the seam repair lamp point to be repaired.
9. The segmented correction device for processing the seam-modifying dark line according to claim 8, wherein the segment fitting module comprises a segment unit and a fitting unit connected with the segment unit, wherein:
the segmentation unit is used for dividing the gray scale into at least two gray stages according to the gray scale-brightness nonlinear graph;
the fitting unit is used for performing linear or curve fitting according to the gray scale in each gray stage and the brightness value corresponding to the gray scale to respectively obtain a gray scale-brightness fitting equation of each gray stage, and if the linear fitting is performed, the fitting unit obtains a preset linear formula F (x) = A + B x, wherein x represents the gray scale value, F (x) represents the brightness value, and A, B is a constant; acquiring a low gray scale threshold value, a brightness value corresponding to the low gray scale threshold value, a high gray scale threshold value and a brightness value corresponding to the high gray scale threshold value of each gray stage, wherein the low gray scale threshold value and the high gray scale threshold value are determined according to the gray scale-brightness nonlinear graph; substituting the low gray level threshold value, the brightness value corresponding to the low gray level threshold value, the high gray level threshold value and the brightness value corresponding to the high gray level threshold value of each gray stage into the preset linear formula, wherein the low gray level threshold value and the high gray level threshold value replace x in the preset linear formula, and calculating to obtain a value of A, B; the value of A, B is substituted into the linear formula f (x) = a + B × x, and a gray-scale-luminance fitting equation for each gray stage is obtained.
10. A computer device comprising a memory in which a computer program is stored and a processor which, when executing the computer program, implements the method steps of the method of handling segmentation correction of repair seam dark lines as claimed in any one of claims 1 to 7.
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