CN115690065B - LED screen module consistency correction method, computer equipment and readable storage medium - Google Patents
LED screen module consistency correction method, computer equipment and readable storage medium Download PDFInfo
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Abstract
The invention discloses a method for correcting consistency of LED screen modules, computer equipment and a readable storage medium, and relates to the technical field of LEDs, wherein the method comprises the following steps: acquiring contrast image sets of the LED screen in different contrast color states, and positioning the positions of the target module and the reference module according to the contrast image sets; acquiring a first test image set of the LED screen in different test color states, extracting a first target image set of the target module and a first reference image set of the reference module, and rapidly adjusting the color gamut value of the target module; the method comprises the steps of obtaining a second test image set of the LED screen in different test color states after rapid adjustment, extracting a second target image set of a target module and a second reference image set of a reference module, and fine-tuning the color gamut value of the target module according to the second target image set and the second reference image set. By adopting the method and the device, the target module can be quickly corrected, the consistency of each module is improved, the patch effect is eliminated, and the whole screen display effect is improved.
Description
Technical Field
The present invention relates to the field of LED technologies, and in particular, to a method for correcting consistency of LED screen modules, a computer device, and a computer readable storage medium.
Background
At present, after the LED screen is produced, the brightness and the chromaticity of each LED lamp tube are inconsistent due to the influence of various factors, so that the whole LED screen is required to be corrected point by adopting a plurality of special and expensive optical instruments before the LED screen leaves a factory, and the brightness and the chromaticity of the whole screen are uniform and consistent. However, after the LED screen is used for a certain period of time, due to the aging of the LED tube, the overall brightness and chromaticity of the LED screen also generate certain attenuation and offset, and if a certain lamp panel module is damaged, a new lamp panel module needs to be replaced; because the brightness of the new lamp panel module is higher than that of the old lamp panel module, and the color is relatively bright, after the new lamp panel module is replaced, the whole screen looks like a very obvious patch, and the display effect is greatly influenced. At this time, the point-by-point correction is needed again to make the brightness and chromaticity of the whole screen consistent.
Currently, the point-by-point correction requires expensive specialized optical instruments and correction systems, and is performed by a professional technician in a dark environment, however, the customer who typically uses LED screens does not have such conditions, and therefore can only send the LED screen to the manufacturer for adjustment. In addition, when the point-by-point correction of the whole LED screen is carried out, the whole screen is disassembled and pulled back to a factory for operation, and the whole screen is pulled back to the site for installation after the whole screen is finished, so that the transportation cost, the labor cost and the time are extremely high.
Therefore, a new calibration method needs to be developed to realize quick and low-cost calibration of the LED screen module.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for correcting the consistency of LED screen modules, computer equipment and a computer readable storage medium, which can be used for quickly correcting a target module, improving the consistency of each module, eliminating the patch effect and improving the whole screen display effect.
In order to solve the technical problems, the invention provides a method for correcting consistency of an LED screen module, which comprises the following steps: s1, acquiring contrast image sets of an LED screen in different contrast color states, and positioning positions of a target module and a reference module in the LED screen according to the contrast image sets; s2, acquiring a first test image set of the LED screen in different test color states, extracting a first target image set of the target module and a first reference image set of the reference module according to the first test image set, and rapidly adjusting the color gamut value of the target module according to the first target image set and the first reference image set; s3, acquiring a second test image set of the LED screen in different test color states after rapid adjustment, extracting a second target image set of the target module and a second reference image set of the reference module according to the second test image set, and fine-tuning the color gamut value of the target module according to the second target image set and the second reference image set.
As an improvement of the above solution, the step S2 includes: s21, acquiring a first test image of the LED screen in a test color state; s22, extracting a first target image of the target module and a first reference image of the reference module according to the first test image; s23, calculating a first target RGB average value of the first target image, converting the first target RGB average value into a first target color gamut value, calculating a first reference RGB average value of the first reference image, and converting the first reference RGB average value into a first reference color gamut value; s24, calculating a first color gamut difference value between the first target color gamut value and a first reference color gamut value; s25, comparing the first color gamut difference value with a preset first color gamut threshold, wherein if the first color gamut difference value is larger than or equal to the first color gamut threshold, calculating a first color gamut difference ratio between the first target color gamut value and a first reference color gamut value, adjusting the color gamut value of the target module according to the first color gamut difference ratio, and returning to the step S21 to acquire a first test image of the LED screen in another test color state for quick adjustment.
As an improvement of the above solution, the step S3 includes: s31, acquiring second test images of the LED screen in different test color states after rapid adjustment; s32, extracting a second target image of the target module and a second reference image of the reference module according to the second test image; s33, calculating a second target RGB average value of the second target image, converting the second target RGB average value into a second target color gamut value, calculating a second reference RGB average value of the second reference image, and converting the first reference RGB average value into a second reference color gamut value; s34, judging whether the fine tuning process is carried out for the first time, if yes, entering a step S35, and if no, entering a step S36; s35, calculating a second color gamut difference value between the second target color gamut value and a second reference color gamut value; s36, constructing a color gamut stepping value according to the second color gamut difference value and the current fine tuning times; s37, judging whether the color gamut stepping value is larger than a preset color gamut adjusting value, if so, adjusting the color gamut value of the target module according to the color gamut stepping value, and returning to the step S31 to acquire a second test image of the LED screen in another test color state for quick adjustment.
As an improvement of the above solution, the step of constructing a gamut step value according to the second gamut difference value and the current trimming number includes: and calculating a color gamut stepping value D according to a formula D=M/N, wherein M is a second color gamut difference value, and N is the current fine tuning frequency.
As an improvement of the above-described scheme, the color gamut value includes a luminance value, a horizontal axis coordinate value in color coordinates, and a vertical axis coordinate value in color coordinates.
As an improvement of the above solution, the step S1 includes: acquiring a first contrast image when all modules in the LED screen display black, a second contrast image when all modules in the LED screen display white, a third contrast image when a target module in the LED screen display white and other modules display black, and a fourth contrast image when a reference module in the LED screen display white and other modules display black; positioning the LED screen according to the first contrast image and the second contrast image; positioning a target module in the positioned LED screen according to the first contrast image and the third contrast image; and positioning a reference module in the positioned LED screen according to the first contrast image and the fourth contrast image.
As an improvement of the above solution, the LED screen module consistency correction method further includes adjusting a shooting parameter of the camera, and the step of adjusting the shooting parameter of the camera includes: s41, setting the aperture value and the photosensitive speed value of the camera to the lowest value; s42, enabling the LED screen to be in a test color state; s43, starting from the lowest shutter value, sequentially increasing the shutter value of the camera according to preset intervals and shooting; s44, when the RGB value of the reference module in the shot photo is larger than a preset reference range, starting from the current shutter value, sequentially reducing the shutter value of the camera according to a preset interval and shooting; s45, finishing adjustment when RGB values of the reference module in the shot photo are in the reference range; s46, returning to the step S42 to enable the LED screen to be in another test color state.
As an improvement of the scheme, the color gamut value of the target module is quickly adjusted through product operation and/or fine-tuned through addition and subtraction operation.
Correspondingly, 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 LED screen module consistency correction method when executing the computer program.
Correspondingly, the invention further provides a computer readable storage medium, wherein the computer program is stored thereon, and the steps of the LED screen module consistency correction method are realized when the computer program is executed by a processor.
The implementation of the invention has the following beneficial effects:
According to the invention, the LED screen is photographed in different test color states through the camera, the target module and the reference module on the photo are compared, and the difference between color gamut values is analyzed, so that the color gamut value of the target module is adjusted for multiple times, the correction process is not needed to be manually participated, the accuracy is high, the consistency is good, the patch effect can be effectively eliminated, and the whole screen display effect is improved.
Meanwhile, the invention can be directly corrected on site in daytime environment without disassembly, and the user only needs to purchase single-phase inverter equipment, so that the use cost is low and the efficiency is high.
Drawings
FIG. 1 is a flowchart of a first embodiment of a method for LED screen module uniformity correction in accordance with the present invention;
FIG. 2 is a schematic diagram of a target module and a reference module in the LED screen module consistency correction method of the present invention;
FIG. 3 is a flowchart of a second embodiment of a method for LED screen module uniformity correction in accordance with the present invention;
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
Referring to fig. 1, fig. 1 shows a first embodiment of the LED screen module uniformity correction method according to the present invention, which comprises:
s101, obtaining comparison image sets of the LED screen in different comparison color states, and positioning positions of a target module and a reference module in the LED screen according to the comparison image sets;
Preferably, the reference module is a module adjacent to the target module. As shown in fig. 2, the module a is a reference module, and the modules B1, B2, B3, B4, B5, B6, B7, and B8 are adjacent modules of the module a, so any one of the adjacent modules is selected as the reference module.
Specifically, step S101 includes:
(1) Acquiring a first contrast image when all modules in the LED screen display black, a second contrast image when all modules in the LED screen display white, a third contrast image when a target module in the LED screen display white and other modules display black, and a fourth contrast image when a reference module in the LED screen display white and other modules display black;
It should be noted that the first contrast image, the second contrast image, the third contrast image, and the fourth contrast image may be captured by the camera. The specific shooting steps are as follows:
K1, starting an LED screen;
K1, mounting a camera on a camera frame, placing the camera right in front of an LED screen, and adjusting the height of the camera frame to be proper, wherein a lens vertically faces the screen, wherein the distance from the LED screen is 10 meters;
k3, determining that a luminous object or a reflecting object except an LED screen does not appear in the shooting range of the camera;
and K4, ensuring that the range between the camera and the lamp panel cannot be blocked from shooting objects, and ensuring that the objects cannot pass through the range in the correction process.
(2) Positioning the LED screen according to the first contrast image and the second contrast image;
Because the camera needs to take a picture of the whole LED screen, the whole LED screen is required to appear in the picture and be fully paved as far as possible by adjusting the alignment position and focal length of the camera, but partial environmental objects are also arranged at the edge of the picture, so that the LED screen needs to be positioned to exclude the environmental objects.
When the LED screen is positioned, a photo of a black screen (namely, all modules in the LED screen display black) and a photo of a white screen (namely, all modules in the LED screen display white) can be taken, and the coordinate position of the LED screen in the photo can be positioned through the contrast color difference, so that the interference of the environmental object part is eliminated.
(3) Positioning a target module in the positioned LED screen according to the first contrast image and the third contrast image;
When in positioning, a photo of a black screen (namely, all modules in the LED screen display black) can be taken first, then, the target module is only displayed in white (namely, the target module in the LED screen displays white and other modules display black), then, shooting is carried out, and the target module can be positioned through comparing color differences.
(4) And positioning a reference module in the positioned LED screen according to the first contrast image and the fourth contrast image.
When in positioning, a photo of a black screen (namely, all modules in the LED screen display black) can be taken first, then, the reference module is only displayed as white (namely, the reference module in the LED screen displays white and other modules display black), then, photographing is carried out, and the reference module can be positioned through comparing color differences.
S102, acquiring a first test image set of the LED screen in different test color states, extracting a first target image set of a target module and a first reference image set of a reference module according to the first test image set, and rapidly adjusting the color gamut value of the target module according to the first target image set and the first reference image set;
Preferably, the test colors may include red, blue and green, but are not limited thereto, wherein the three primary colors of red, blue and green are used to cover all colors perceived by human vision with higher accuracy; specifically, the LED screen being in the red state means that all modules in the LED screen display red, the LED screen being in the blue state means that all modules in the LED screen display blue, and the LED screen being in the green state means that all modules in the LED screen display green.
It should be noted that, by placing the LED screen in different test color states, the color gamut value of the target module may be adjusted from multiple angles, so that the correction of the target module is more comprehensive. Accordingly, the color gamut value comprises a brightness value, a horizontal axis coordinate value in the color coordinates and a vertical axis coordinate value in the color coordinates, and the accurate adjustment of the target module can be realized through the targeted adjustment of the color gamut value.
Specifically, step S102 includes:
(1) Acquiring a first test image of the LED screen in a test color state;
(2) Extracting a first target image of the target module and a first reference image of the reference module according to the first test image;
(3) Calculating a first target RGB average value of the first target image and converting the first target RGB average value into a first target color gamut value, calculating a first reference RGB average value of the first reference image and converting the first reference RGB average value into a first reference color gamut value;
the first target RGB average value refers to the RGB average value of each pixel point in the first target image; the first reference RGB average value refers to an RGB average value of each pixel point in the first reference image.
Correspondingly, the first target color gamut value comprises a first target brightness value, a horizontal axis coordinate value of the first target in the color coordinates and a vertical axis coordinate value of the first target in the color coordinates; the first reference color gamut value includes a first reference luminance value, a horizontal axis coordinate value of the first reference in the color coordinates, and a vertical axis coordinate value of the first reference in the color coordinates.
(4) Calculating a first gamut difference between the first target gamut value and the first reference gamut value;
the first color gamut difference comprises a first brightness difference value, a first transverse axis coordinate difference value and a first longitudinal axis coordinate difference value; specifically, the step (4) needs to calculate the first luminance difference between the first target luminance value and the first reference luminance value, calculate the first horizontal axis coordinate difference between the horizontal axis coordinate value of the first target and the horizontal axis coordinate value of the first reference in the color coordinates, and calculate the first vertical axis coordinate difference between the vertical axis coordinate value of the first target and the vertical axis coordinate value of the first reference in the color coordinates.
(5) And (3) comparing the first color gamut difference value with a preset first color gamut threshold, wherein if the first color gamut difference value is larger than or equal to the first color gamut threshold, calculating a first color gamut difference ratio between a first target color gamut value and a first reference color gamut value, adjusting the color gamut value of the target module according to the first color gamut difference ratio, and returning to the step (1) to acquire a first test image of the LED screen in another test color state for quick adjustment.
Specifically, the first gamut threshold includes a first luminance threshold, a first horizontal axis coordinate threshold, and a first vertical axis coordinate threshold;
Comparing the first brightness difference value with a first brightness threshold value, if the first brightness difference value is larger than or equal to the first brightness threshold value, calculating a first brightness difference ratio between a first target brightness value and a first reference brightness value, and adjusting the brightness value of the target module according to the first brightness difference ratio;
Comparing the first transverse axis coordinate difference value with a first transverse axis coordinate threshold, if the first transverse axis coordinate difference value is larger than or equal to the first transverse axis coordinate threshold, calculating a first transverse axis coordinate difference ratio between the first target transverse axis coordinate value and the first reference transverse axis coordinate value, and adjusting the transverse axis coordinate value of the target module according to the first transverse axis coordinate difference ratio;
and comparing the first vertical axis coordinate difference value with a first vertical axis coordinate threshold value, if the first vertical axis coordinate difference value is larger than or equal to the first vertical axis coordinate threshold value, calculating a first vertical axis coordinate difference ratio between the first target vertical axis coordinate value and the first reference vertical axis coordinate value, and adjusting the vertical axis coordinate value of the target module according to the first vertical axis coordinate difference ratio.
And (3) after the adjustment is finished, shooting the LED screen in another test color state again, and carrying out the rapid adjustment in the steps (1) - (5) again until the first brightness difference value is smaller than a first brightness threshold value, the first transverse axis coordinate difference value is smaller than a first transverse axis coordinate threshold value and the first longitudinal axis coordinate difference value is smaller than a first longitudinal axis coordinate threshold value, ending the circulation, and finishing the rapid adjustment.
Preferably, the adjustment of the color gamut value may be achieved by means of a product. For example, if the first reference luminance value is 10 and the first target luminance value is 15, the first luminance difference ratio is 10/15, and if the first target luminance value is 15 and the first luminance difference ratio are multiplied, the first target luminance value is adjusted to 10 (15×10/15=10). However, since the first reference luminance value and the first target luminance value are values analyzed by the image, which are not true values but are relative values, after such a transformation, the target module is close to the reference module, but not exactly the same, and thus this step needs to be repeated a plurality of times until their difference is less than the first luminance threshold value. Accordingly, the fast adjustment manners of the horizontal axis coordinate and the vertical axis coordinate are the same as the express adjustment manner of the brightness value, and are not repeated here.
S103, acquiring a second test image set of the LED screen in different test color states after rapid adjustment, extracting a second target image set of the target module and a second reference image set of the reference module according to the second test image set, and fine-tuning the color gamut value of the target module according to the second target image set and the second reference image set.
Specifically, step S103 includes:
(1) Acquiring a second test image of the LED screen in different test color states after the quick adjustment;
(2) Extracting a second target image of the target module and a second reference image of the reference module according to the second test image;
(3) Calculating a second target RGB average value of the second target image and converting the second target RGB average value into a second target color gamut value, calculating a second reference RGB average value of the second reference image and converting the first reference RGB average value into a second reference color gamut value;
The second target RGB average value refers to the RGB average value of each pixel point in the second target image; the second reference RGB average value refers to an RGB average value of each pixel point in the first reference image.
Correspondingly, the second target color gamut value comprises a second target brightness value, a horizontal axis coordinate value of the second target in the color coordinates and a vertical axis coordinate value of the second target in the color coordinates; the second reference color gamut value includes a second reference luminance value, a horizontal axis coordinate value of the second reference in the color coordinates, and a vertical axis coordinate value of the second reference in the color coordinates.
(4) Judging whether the fine tuning process is carried out for the first time, if yes, entering the step (5), and if no, entering the step (6);
(5) Calculating a second gamut difference between the second target gamut value and the second reference gamut value;
The second color gamut difference comprises a second brightness difference value, a second horizontal axis coordinate difference value and a second vertical axis coordinate difference value; specifically, the step (5) needs to calculate the second luminance difference between the second target luminance value and the second reference luminance value, calculate the second horizontal axis coordinate difference between the horizontal axis coordinate value of the second target and the horizontal axis coordinate value of the second reference in the color coordinates, and calculate the second vertical axis coordinate difference between the vertical axis coordinate value of the second target and the vertical axis coordinate value of the second reference in the color coordinates.
(6) Constructing a color gamut stepping value according to the second color gamut difference value and the current fine tuning times;
further, the gamut step value D may be calculated according to the formula d=m/N, where M is the second gamut difference and N is the current number of fine adjustments. The color gamut step values include a brightness step value, a horizontal axis coordinate step value, and a vertical axis coordinate step value.
That is, the luminance step value=the second luminance difference value/the current trimming number, the horizontal axis coordinate step value=the second horizontal axis coordinate difference value/the current trimming number, and the vertical axis coordinate step value=the second vertical axis coordinate difference value/the current trimming number.
For example, the second brightness difference value is 5, and the current trimming number is 1, and the corresponding brightness stepping value is 5;
for another example, the second luminance difference value 4, the current trimming number 2, corresponds to a luminance step value of 2.
(7) Judging whether the color gamut stepping value is larger than a preset color gamut adjusting value, wherein if the color gamut stepping value is larger than the preset color gamut adjusting value, adjusting the color gamut value of the target module according to the color gamut stepping value, and returning to the step S31 to acquire a second test image of the LED screen in another test color state for quick adjustment.
The color gamut adjustment value includes a luminance adjustment value, a horizontal axis coordinate adjustment value, and a vertical axis coordinate adjustment value, wherein the luminance adjustment value is preferably 1, the horizontal axis coordinate adjustment value is preferably 0.0001, and the vertical axis coordinate adjustment value is preferably 0.0001, but is not limited thereto.
Specifically, comparing the brightness step value with the brightness adjustment value, and if the brightness step value is larger than the preset brightness adjustment value, adjusting the brightness value of the target module according to the brightness step value; meanwhile, comparing the transverse axis coordinate step value with the transverse axis coordinate adjustment value, and adjusting the transverse axis coordinate of the target module according to the transverse axis coordinate step value if the transverse axis coordinate step value is larger than the preset transverse axis coordinate adjustment value; comparing the vertical axis coordinate step value with the vertical axis coordinate adjustment value, and adjusting the vertical axis coordinate of the target module according to the vertical axis coordinate step value if the vertical axis coordinate step value is larger than the preset vertical axis coordinate adjustment value; and (3) after the adjustment is finished, shooting the LED screen in another test color state again, and repeating the quick adjustment in the steps (1) - (7) until the brightness stepping value is not larger than a preset brightness adjustment value, the transverse axis coordinate stepping value is not larger than a preset transverse axis coordinate adjustment value and the longitudinal axis coordinate stepping value is not larger than a preset longitudinal axis coordinate adjustment value, ending the cycle, and finishing fine adjustment.
Preferably, the adjustment of the color gamut value may be achieved by addition and subtraction. For example, the luminance adjustment value is preferably 1, the second reference luminance value is 10, the second target luminance value is 13, and when fine adjustment is performed for the first time, the luminance step value is 3 (13-10=3, 3/1= 3>1), and the luminance value of the target module may be subjected to a subtraction operation of "3" so that the luminance value of the target module becomes 10 (13-3=10); then, the test color is replaced to enter a second fine tuning, at this time, the second reference brightness value is 13.5, the second target brightness value is 11, the brightness step value is 1.25 (13.5-11= 2.5,2.5/2=1.25 > 1), and the brightness value of the target module needs to be added with 1.25 so as to change the brightness value of the target module to 12.25 (11+1.25=12.25); then, the test color is replaced again to perform third fine adjustment, at this time, the second reference brightness value is 13, the second target brightness value is 12, and the brightness step value is 1.25 (13-12=1, 1/3=0.33 < 1), so that fine adjustment of the brightness value can be completed. The manner of fine tuning the horizontal axis coordinates and the vertical axis coordinates is the same, and will not be repeated here.
In summary, the invention photographs the LED screen under different test color states by the camera, obtains the RGB values of the target module and the reference module on the photograph, compares the RGB values, analyzes the difference between the color gamut values, thereby adjusting the color gamut value of the target module, photographs the LED screen again, and repeats the process for a plurality of times until the photograph cannot see the difference, and the correction process does not need to be manually participated, so that the accuracy is high and the precision is good.
Referring to fig. 3, fig. 3 shows a second embodiment of the LED screen module uniformity correction method according to the present invention, comprising:
S201, obtaining comparison image sets of the LED screen in different comparison color states, and positioning positions of the target module and the reference module in the LED screen according to the comparison image sets;
s202, adjusting shooting parameters of a camera;
The photo analysis requires a photo that cannot be overexposed or too dark, and RGB values of about 200 are most suitable, so that the shooting parameters of the camera need to be adjusted specifically. Specifically, the step of adjusting the photographing parameters of the camera includes:
(1) Setting an aperture value and a photosensitive speed value of the camera to minimum values;
since the brightness of the LED screen is relatively high, the aperture of the camera and the ISO (i.e. the speed value of the CCD or CMOS light sensitive element) are fixed at the darkest parameters, and then an optimal parameter setting is obtained by varying the shutter value.
(2) The LED screen is in a test color state;
(3) Sequentially increasing the shutter value of the camera according to preset intervals from the lowest shutter value and shooting;
(4) When RGB values of a reference module in the shot photo are larger than a preset reference range, starting from the current shutter value, sequentially reducing the shutter value of the camera according to preset intervals and shooting;
Preferably, the reference range may be 200, so as to ensure that the photograph is neither overexposed nor too dark.
(5) When RGB values of a reference module in the shot photo are in a reference range, finishing adjustment;
(6) Returning to the step (2) to enable the LED screen to be in another test color state.
Preferably, the LED screen may be in a red state; shooting the shutter value from the lowest value, and then jumping to 5 steps for shooting until the RGB value of the reference module in the photo exceeds 200; then the camera is lowered back from gear to gear, and photographing is carried out until the RGB value of the reference module is just about 200; the LED screen is then placed in the green/blue state and the above steps are repeated.
S203, acquiring a first test image set of the LED screen in different test color states, extracting a first target image set of the target module and a first reference image set of the reference module according to the first test image set, and rapidly adjusting the color gamut value of the target module according to the first target image set and the first reference image set;
S204, acquiring a second test image set of the LED screen in different test color states after rapid adjustment, extracting a second target image set of the target module and a second reference image set of the reference module according to the second test image set, and fine-tuning the color gamut value of the target module according to the second target image set and the second reference image set.
In summary, the invention has the following beneficial effects:
1. The use cost is low, and the user can easily purchase the single-phase inverter equipment;
2. the correction is directly carried out on site without disassembly;
3. can be corrected in daytime environments;
4. the efficiency is high, and the process can be completed within about 10 minutes;
5. The correction process is automatically operated without professional technicians;
6. after correction is completed, the consistency of the module is improved, the patch effect is eliminated, and the whole screen display effect is improved.
Correspondingly, 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 LED screen module consistency correction method when executing the computer program. Meanwhile, the invention also provides a computer readable storage medium, on which a computer program is stored, wherein the computer program realizes the steps of the LED screen module consistency correction method when being executed by a processor.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (8)
1. The LED screen module consistency correction method is characterized by comprising the following steps of:
S1, acquiring contrast image sets of an LED screen in different contrast color states, and positioning positions of a target module and a reference module in the LED screen according to the contrast image sets;
S2, acquiring a first test image set of the LED screen in different test color states, extracting a first target image set of the target module and a first reference image set of the reference module according to the first test image set, and rapidly adjusting the color gamut value of the target module according to the first target image set and the first reference image set;
S3, acquiring a second test image set of the LED screen in different test color states after rapid adjustment, extracting a second target image set of the target module and a second reference image set of the reference module according to the second test image set, and fine-tuning the color gamut value of the target module according to the second target image set and the second reference image set;
The step S2 comprises the following steps: s21, acquiring a first test image of the LED screen in a test color state; s22, extracting a first target image of the target module and a first reference image of the reference module according to the first test image; s23, calculating a first target RGB average value of the first target image, converting the first target RGB average value into a first target color gamut value, calculating a first reference RGB average value of the first reference image, and converting the first reference RGB average value into a first reference color gamut value; s24, calculating a first color gamut difference value between the first target color gamut value and a first reference color gamut value; s25, comparing the first color gamut difference value with a preset first color gamut threshold, wherein if the first color gamut difference value is larger than or equal to the first color gamut threshold, calculating a first color gamut difference ratio between the first target color gamut value and a first reference color gamut value, adjusting the color gamut value of the target module according to the first color gamut difference ratio, and returning to the step S21 to acquire a first test image of the LED screen in another test color state for quick adjustment;
The step S3 comprises the following steps: s31, acquiring second test images of the LED screen in different test color states after rapid adjustment; s32, extracting a second target image of the target module and a second reference image of the reference module according to the second test image; s33, calculating a second target RGB average value of the second target image, converting the second target RGB average value into a second target color gamut value, calculating a second reference RGB average value of the second reference image, and converting the first reference RGB average value into a second reference color gamut value; s34, judging whether the fine tuning process is carried out for the first time, if yes, entering a step S35, and if no, entering a step S36; s35, calculating a second color gamut difference value between the second target color gamut value and a second reference color gamut value; s36, constructing a color gamut stepping value according to the second color gamut difference value and the current fine tuning times; s37, judging whether the color gamut stepping value is larger than a preset color gamut adjusting value, if so, adjusting the color gamut value of the target module according to the color gamut stepping value, and returning to the step S31 to acquire a second test image of the LED screen in another test color state for quick adjustment.
2. The LED screen module uniformity correction method according to claim 1, wherein said step of constructing a gamut step value based on said second gamut difference and a current number of fine adjustments comprises:
And calculating a color gamut stepping value D according to a formula D=M/N, wherein M is a second color gamut difference value, and N is the current fine tuning frequency.
3. The LED screen module uniformity correction method according to any of claims 1-2, wherein said color gamut values comprise luminance values, horizontal axis coordinate values in color coordinates, and vertical axis coordinate values in color coordinates.
4. The LED screen module uniformity correction method according to claim 1, wherein step S1 comprises:
acquiring a first contrast image when all modules in the LED screen display black, a second contrast image when all modules in the LED screen display white, a third contrast image when a target module in the LED screen display white and other modules display black, and a fourth contrast image when a reference module in the LED screen display white and other modules display black;
positioning the LED screen according to the first contrast image and the second contrast image;
Positioning a target module in the positioned LED screen according to the first contrast image and the third contrast image;
and positioning a reference module in the positioned LED screen according to the first contrast image and the fourth contrast image.
5. The LED screen module uniformity correction method according to claim 1, further comprising adjusting a photographing parameter of a camera, said adjusting the photographing parameter of the camera comprising:
s41, setting the aperture value and the photosensitive speed value of the camera to the lowest value;
S42, enabling the LED screen to be in a test color state;
S43, starting from the lowest shutter value, sequentially increasing the shutter value of the camera according to preset intervals and shooting;
S44, when the RGB value of the reference module in the shot photo is larger than a preset reference range, starting from the current shutter value, sequentially reducing the shutter value of the camera according to a preset interval and shooting;
s45, finishing adjustment when RGB values of the reference module in the shot photo are in the reference range;
s46, returning to the step S42 to enable the LED screen to be in another test color state.
6. A method of calibrating consistency of LED screen modules according to claim 1, wherein the color gamut value of the target module is quickly adjusted by a product operation and/or fine-tuned by an add-subtract operation.
7. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 6 when the computer program is executed.
8. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
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