CN115690065A - 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
- Publication number
- CN115690065A CN115690065A CN202211401797.7A CN202211401797A CN115690065A CN 115690065 A CN115690065 A CN 115690065A CN 202211401797 A CN202211401797 A CN 202211401797A CN 115690065 A CN115690065 A CN 115690065A
- Authority
- CN
- China
- Prior art keywords
- value
- target
- color gamut
- module
- led screen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000012937 correction Methods 0.000 title claims description 25
- 238000012360 testing method Methods 0.000 claims abstract description 72
- 238000004590 computer program Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 239000003086 colorant Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000007557 optical granulometry Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Images
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a method for correcting consistency of LED screen modules, computer equipment and a readable storage medium, which relate to the technical field of LEDs, and 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 a target module and a first reference image set of a reference module, and quickly adjusting a color gamut value of the target module; and acquiring a second test image set of the LED screen after rapid adjustment in different test color states, extracting a second target image set of the target module and a second reference image set of the reference module, and finely adjusting the color gamut value of the target module according to the second target image set and the second reference image set. By adopting the invention, the target module can be corrected quickly, the consistency of each module is improved, the patching effect is eliminated, and the whole screen display effect is improved.
Description
Technical Field
The invention relates to the technical field of LEDs, in particular to a method for correcting consistency of LED screen modules, computer equipment and a computer readable storage medium.
Background
After the existing LED screen is produced, the brightness and the chromaticity of each LED lamp tube are not consistent due to the influence of various factors, so that before the LED screen leaves a factory, a plurality of professional expensive optical instruments are needed to correct the whole LED screen point by point, so that the brightness and the chromaticity of the whole screen are uniform and consistent. However, after the LED screen is used for a period of time, due to aging of the LED lamp tube, the overall brightness and chromaticity of the LED screen will also be weakened and shifted to some extent, and at this time, if a certain lamp panel module is damaged, a new lamp panel module needs to be replaced; because the luminance of new lamp plate module is higher than the luminance of old lamp plate module a little, and the colour also can be bright-colored relatively, consequently, after the new lamp plate module of more renewing, whole screen looks will appear a very obvious patch, has influenced display effect widely. At this time, the point-by-point correction is needed again to make the brightness and the chromaticity of the whole screen consistent.
Currently, the point-by-point correction requires the use of expensive professional optical instruments and correction systems and is performed by professional technicians in dark environments, however, customers who generally use LED screens do not have such conditions, and therefore, the LED screens can only be sent to manufacturers for adjustment. Moreover, when the point-by-point correction of the whole LED screen is performed, the whole screen needs to be disassembled and pulled back to the factory for operation, and then the whole screen needs to be pulled back to the site for installation, which costs a great deal of transportation cost, labor cost and time.
Therefore, it is necessary to develop a new calibration method to achieve fast and low-cost calibration of the LED panel module.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for calibrating the consistency of LED screen modules, a computer device and a computer-readable storage medium, which can quickly calibrate a target module, improve the consistency of each module, eliminate the patching effect and improve the whole screen display effect.
In order to solve the technical problem, the invention provides a method for correcting the consistency of an LED screen module, which comprises the following steps: s1, obtaining contrast image sets of an LED screen in different contrast color states, and positioning the 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; and S3, acquiring a second test image set of the LED screen after rapid adjustment in different test color states, 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 finely adjusting 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 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; s24, calculating a first gamut difference between the first target gamut value and a first reference gamut value; and S25, comparing the first color gamut difference value with a preset first color gamut threshold, wherein if the first color gamut difference value is greater 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 obtain a first test image of the LED screen in another test color state for rapid adjustment.
As a modification of the above, the step S3 includes: s31, acquiring a second test image of the LED screen after rapid adjustment in different test color states; 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 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; s34, judging whether to enter a fine adjustment flow for the first time, if so, entering a step S35, and if not, entering a step S36; s35, calculating a second gamut difference between the second target gamut value and a second reference gamut value; s36, constructing a color gamut stepping value according to the second color gamut difference value and the current fine adjustment times; and S37, judging whether the color gamut stepping value is greater 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 obtain a second test image of the LED screen in another test color state for quick adjustment.
As an improvement of the foregoing solution, the step of constructing the color gamut step value according to the second color gamut difference value and the current fine adjustment 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 adjustment times.
As an improvement of the above, 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 a modification of the above, 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 displays white and other modules display black, and a fourth contrast image when a reference module in the LED screen displays 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 panel module consistency correction method further includes adjusting shooting parameters of a camera, and the step of adjusting the shooting parameters of the camera includes: s41, setting the aperture value and the photosensitive speed value of the camera to be the lowest values; s42, enabling the LED screen to be in a color testing state; s43, starting from the lowest shutter value, sequentially increasing the shutter values of the camera according to a preset interval and shooting; s44, when the RGB value of the reference module in the shot picture is larger than a preset reference range, sequentially reducing the shutter value of the camera according to a preset interval from the current shutter value and shooting; s45, when the RGB value of the reference module in the shot picture is in the reference range, adjusting is completed; s46, returning to the step S42 to enable the LED screen to be in another test color state.
As an improvement of the above scheme, the color gamut value of the target module is rapidly adjusted through multiplication and/or is finely adjusted through addition and subtraction.
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.
Accordingly, the present invention also provides a computer readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the LED screen module consistency correction method described above.
The implementation of the invention has the following beneficial effects:
according to the method, the camera is used for photographing the LED screen in different test color states, the target module and the reference module on the photograph 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, manual participation is not needed in the correction process, 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 directly correct on site in the daytime environment without disassembly, and a user only needs to purchase single lens reflex equipment, so that the use cost is low and the efficiency is high.
Drawings
FIG. 1 is a flowchart of a method for calibrating the consistency of an LED panel module according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a target module and a reference module in the method for calibrating the consistency of LED screen modules according to the present invention;
FIG. 3 is a flowchart illustrating a method for calibrating LED panel module uniformity according to a second embodiment of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 shows a first embodiment of the LED panel module uniformity correction method of the present invention, which comprises:
s101, obtaining contrast image sets of the LED screen in different contrast color states, and positioning the positions of a target module and a reference module in the LED screen according to the contrast 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 all adjacent modules of the module a, so that any one of the adjacent modules can be 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 displays white and other modules display black, and a fourth contrast image when a reference module in the LED screen displays white and other modules display black;
the first contrast image, the second contrast image, the third contrast image, and the fourth contrast image may be captured by a camera. The specific shooting steps are as follows:
k1, turning on the LED screen;
k1, mounting a camera on a camera frame, placing the camera right in front of the LED screen, and adjusting the height of the camera frame to a proper height, wherein the distance between the camera frame and the LED screen is 10 meters, and a lens vertically faces the screen;
k3, determining that no light-emitting object or light-reflecting object except the LED screen appears in the shooting range of the camera;
k4 ensures that the object that blocks the shooting can not appear in the scope in the middle of camera and the lamp plate, in the calibration process, ensures also that can not the object passes through this scope.
(2) Positioning the LED screen according to the first contrast image and the second contrast image;
because the camera needs to photograph the whole LED screen, the whole LED screen is required to be displayed in the picture and the picture is fully paved as far as possible by adjusting the position and the focal length aligned with the camera, but partial environment objects are also arranged at the edge of the picture, so that the LED screen needs to be positioned to remove the environment objects.
During positioning, a black screen (namely all modules in the LED screen display black) photo and a white screen (namely all modules in the LED screen display white) photo can be shot firstly, and the coordinate position of the LED screen in the photo can be positioned by comparing color differences, so that the interference of an 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;
during positioning, a picture of a black screen (namely, all modules in the LED screen display black) can be taken firstly, then only the target module is displayed as white (namely, the target module in the LED screen displays white and other modules display black), then the picture is taken, and the target module can be positioned by comparing color differences.
(4) And positioning the reference module in the LED screen which is positioned according to the first contrast image and the fourth contrast image.
During positioning, a black screen (namely, all modules in the LED screen display black) photo can be firstly shot, then only the reference module is displayed as white (namely, the reference module in the LED screen displays white and other modules display black), then the photo is taken, and the reference module can be positioned by 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 quickly adjusting a 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, but are not limited to, red, blue and green, wherein the use of the three primary colors red, blue and green can cover all colors that can be perceived by human vision with greater accuracy; specifically, the LED screen in the red state means that all modules in the LED screen display red, the LED screen in the blue state means that all modules in the LED screen display blue, and the LED screen 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 can be adjusted from multiple angles, so that the target module is corrected more comprehensively. Accordingly, the color gamut value comprises a brightness value, a horizontal axis coordinate value in the color coordinate and a vertical axis coordinate value in the color coordinate, and the target module can be accurately adjusted by pertinence 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, 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 is the RGB average value of each pixel point in the first target image; the first reference RGB average value is 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 a 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, a first horizontal axis coordinate difference and a first vertical axis coordinate difference; specifically, in the step (4), a first brightness difference between the first target brightness value and the first reference brightness value, a first horizontal axis coordinate difference between a horizontal axis coordinate value of the first target in the color coordinates and a horizontal axis coordinate value of the first reference, and a first vertical axis coordinate difference between a vertical axis coordinate value of the first target in the color coordinates and a vertical axis coordinate value of the first reference are calculated, respectively.
(5) And (2) comparing the first color gamut difference value with a preset first color gamut threshold value, wherein if the first color gamut difference value is greater than or equal to the first color gamut threshold value, 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 obtain a first test image of the LED screen in another test color state for quick adjustment.
Specifically, the first color 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 with a first brightness threshold, if the first brightness difference is greater than or equal to the first brightness threshold, calculating a first brightness difference ratio between the first target brightness value and the first reference brightness value, and adjusting the brightness value of the target module according to the first brightness difference ratio;
comparing the first cross-axis coordinate difference value with a first cross-axis coordinate threshold, if the first cross-axis coordinate difference value is greater than or equal to the first cross-axis coordinate threshold, calculating a first cross-axis coordinate difference ratio between a first target cross-axis coordinate value and a first reference cross-axis coordinate value, and adjusting the cross-axis coordinate value of the target module according to the first cross-axis coordinate difference ratio;
and comparing the first longitudinal axis coordinate difference value with a first longitudinal axis coordinate threshold, if the first longitudinal axis coordinate difference value is greater than or equal to the first longitudinal axis coordinate threshold, calculating a first longitudinal axis coordinate difference ratio between the first target longitudinal axis coordinate value and the first reference longitudinal axis coordinate value, and adjusting the longitudinal axis coordinate value of the target module according to the first longitudinal axis coordinate difference ratio.
And (3) after the adjustment is finished, the LED screen is photographed under another test color state again, the quick adjustment in the steps (1) to (5) is carried out again until the first brightness difference value is smaller than the first brightness threshold value, the first horizontal axis coordinate difference value is smaller than the first horizontal axis coordinate threshold value and the first vertical axis coordinate difference value is smaller than the first vertical axis coordinate threshold value, the circulation is finished, and the quick adjustment is finished.
Preferably, the adjustment of the color gamut value may be achieved by means of multiplication. For example, if the first reference brightness value is 10, the first target brightness value is 15, and the first brightness difference ratio is 10/15, the first target brightness value is 15, and the first brightness difference ratio are multiplied, so that the first target brightness value is adjusted to 10 (15 × 10/15= 10). However, since the first reference luminance value and the first target luminance value are values obtained by image analysis, which are not true values but relative values, after one conversion, the target module approaches the reference module, but not exactly the same, and therefore, the step needs to be repeated for a plurality of times until the difference between the first reference luminance value and the first target luminance value is less than the first luminance threshold. Correspondingly, the quick adjustment mode of the horizontal axis coordinate and the vertical axis coordinate is the same as the express adjustment mode of the brightness value, and the explanation is not repeated here.
S103, a second test image set of the LED screen after fast adjustment in different test color states is obtained, a second target image set of the target module and a second reference image set of the reference module are extracted according to the second test image set, and the color gamut value of the target module is finely adjusted 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 after rapid adjustment in different test color states;
(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 a 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 a second reference image and converting the first reference RGB average value into a second reference color gamut value;
the second target RGB average value is the RGB average value of each pixel point in the second target image; the second reference RGB average value is an average value of RGB 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 flow is entered for the first time, if so, entering the step (5), and if not, 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 value comprises a second brightness difference value, a second horizontal axis coordinate difference value and a second vertical axis coordinate difference value; specifically, in the step (5), a second luminance difference between the second target luminance value and the second reference luminance value, a second abscissa coordinate difference between the abscissa coordinate value of the second target in the color coordinates and the abscissa coordinate value of the second reference, and a second ordinate coordinate difference between the ordinate coordinate value of the second target in the color coordinates and the ordinate coordinate value of the second reference are calculated, respectively.
(6) Constructing a color gamut stepping value according to the second color gamut difference value and the current fine adjustment times;
further, the gamut step value D may be calculated according to the formula D = M/N, where M is the second gamut difference value and N is the current fine tuning number. The color gamut step value comprises a brightness step value, a horizontal axis coordinate step value and a vertical axis coordinate step value.
That is, the luminance step value = a second luminance difference value/the current number of fine adjustments, the abscissa coordinate step value = a second abscissa coordinate difference value/the current number of fine adjustments, and the ordinate coordinate step value = a second ordinate coordinate difference value/the current number of fine adjustments.
For example, if the second brightness difference value 5 is the current fine adjustment frequency 1, the corresponding brightness step value is 5;
for another example, if the second brightness difference 4 is the current fine adjustment number of times 2, the corresponding brightness step value is 2.
(7) And judging whether the color gamut stepping value is greater 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 obtain a second test image of the LED screen in another test color state for quick adjustment.
The color gamut adjustment value includes a brightness adjustment value, a horizontal axis coordinate adjustment value, and a vertical axis coordinate adjustment value, where the brightness 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 not limited thereto.
Specifically, the brightness stepping value is compared with the brightness adjustment value, and if the brightness stepping value is greater than the preset brightness adjustment value, the brightness value of the target module is adjusted according to the brightness stepping value; meanwhile, the step value of the horizontal axis coordinate is compared with the adjustment value of the horizontal axis coordinate, and if the step value of the horizontal axis coordinate is greater than the preset adjustment value of the horizontal axis coordinate, the horizontal axis coordinate of the target module is adjusted according to the step value of the horizontal axis coordinate; the longitudinal axis coordinate stepping value is compared with a longitudinal axis coordinate adjusting value, and if the longitudinal axis coordinate stepping value is larger than the preset longitudinal axis coordinate adjusting value, the longitudinal axis coordinate of the target module is adjusted according to the longitudinal axis coordinate stepping value; and (3) after the adjustment is finished, photographing the LED screen under another test color state, and quickly adjusting the steps (1) to (7) again until the brightness stepping value is not greater than the preset brightness adjustment value, the horizontal axis coordinate stepping value is not greater than the preset horizontal axis coordinate adjustment value and the vertical axis coordinate stepping value is not greater than the preset vertical axis coordinate adjustment value, ending the circulation and finishing fine adjustment.
Preferably, the adjustment of the color gamut value can be realized by addition and subtraction. For example, the brightness adjustment value is preferably 1, the second reference brightness value is 10, the second target brightness value is 13, the brightness step value is 3 (13-10 =3,3/1=3> -1) when the first trimming is performed, and the brightness value of the target block may be reduced by "3" so that the brightness value of the target block becomes 10 (13-3 = 10); then, the test color is changed to enter the second fine adjustment, at this time, the second reference brightness value is 13.5, the second target brightness value is 11, and the brightness step value is 1.25 (13.5-11 =2.5,2.5/2=1.25> "1), the brightness value of the target module needs to be increased by" 1.25 "so that the brightness value of the target module becomes 12.25 (11 +1.25= 12.25); then, the test color is changed again to enter the third fine adjustment, in which 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 and is restricted to 1), i.e., the fine adjustment of the brightness value is completed. The fine tuning manner of the abscissa and the ordinate is the same, and will not be repeated here.
In summary, the invention takes pictures of the LED screen in different test color states through the camera, obtains RGB values of the target module and the reference module on the picture to compare, analyzes the difference between the color gamut values, adjusts the color gamut value of the target module, then takes pictures, and repeats the steps for a plurality of times until the difference is not seen in the picture, and the correction process does not need manual participation, and has high accuracy and good precision.
Referring to fig. 3, fig. 3 shows a second embodiment of the LED panel module uniformity correction method of the present invention, which comprises:
s201, obtaining a contrast image set of the LED screen in different contrast color states, and positioning the positions of a target module and a reference module in the LED screen according to the contrast image set;
s202, adjusting shooting parameters of a camera;
the photo analysis needs a photo which cannot be over-exposed or too dark, and the RGB value is about 200, so that the shooting parameters of the camera need to be adjusted in a targeted manner. Specifically, the step of adjusting the photographing parameters of the camera includes:
(1) Setting the aperture value and the photosensitive speed value of the camera as the lowest values;
because the brightness of the LED screen is relatively high, the aperture and ISO (i.e. the photosensitive speed of the CCD or CMOS photosensitive element) of the camera are fixed to the darkest parameters, and then an optimum parameter setting is obtained by varying the shutter value.
(2) Enabling the LED screen to be in a test color state;
(3) Sequentially increasing the shutter value of the camera according to a preset interval from the lowest shutter value and shooting;
(4) When the RGB value of the reference module in the shot picture is larger than a preset reference range, sequentially reducing the shutter value of the camera according to a preset interval from the current shutter value and shooting;
preferably, the reference range may be 200 to ensure that the photograph is not over exposed, nor too dark.
(5) When the RGB value of the reference module in the shot picture is in the reference range, the adjustment is completed;
(6) And (3) returning to the step (2) to enable the LED screen to be in another test color state.
Preferably, the LED screen can be made in a red state; firstly, photographing the shutter value from the lowest value, then jumping to 5 steps and photographing again until the RGB value of the reference module in the photograph exceeds 200; then, the system is lowered back by gear to take a picture 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 a target module and a first reference image set of a reference module according to the first test image set, and quickly adjusting a color gamut value of the target module according to the first target image set and the first reference image set;
s204, a second test image set of the LED screen after fast adjustment in different test color states is obtained, a second target image set of the target module and a second reference image set of the reference module are extracted according to the second test image set, and the color gamut value of the target module is finely adjusted according to the second target image set and the second reference image set.
In summary, the invention has the following beneficial effects:
1. the single lens reflex camera device is low in use cost and easy to purchase by a user;
2. the correction is directly carried out on site without disassembly;
3. can be corrected in a daytime environment;
4. the efficiency is high and can be finished in about 10 minutes;
5. the correction process is operated automatically, and professional technicians are not needed;
6. after the correction is completed, the module consistency becomes good, 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 executes the computer program to realize the steps of the LED screen module consistency correction method. Meanwhile, the invention also provides a computer readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, realizes the steps of the LED screen module consistency correction method.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A method for correcting consistency of LED screen modules is characterized by comprising the following steps:
s1, obtaining contrast image sets of an LED screen in different contrast color states, and positioning the 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;
and S3, acquiring a second test image set of the LED screen after rapid adjustment in different test color states, 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 finely adjusting the color gamut value of the target module according to the second target image set and the second reference image set.
2. The LED panel module uniformity correction method of claim 1, wherein said step S2 comprises:
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 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;
s24, calculating a first color gamut difference between the first target color gamut value and the first reference color gamut value;
s25, comparing the first color gamut difference value with a preset first color gamut threshold value, wherein,
if the first color gamut difference is greater 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 step S21 to obtain a first test image of the LED screen in another test color state for rapid adjustment.
3. The LED panel module uniformity correction method of claim 1, wherein said step S3 comprises:
s31, acquiring a second test image of the LED screen after rapid adjustment in different test color states;
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 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;
s34, judging whether to enter a fine adjustment flow for the first time, if so, entering a step S35, and if not, entering a step S36;
s35, calculating a second gamut difference between the second target gamut value and a second reference gamut value;
s36, constructing a color gamut stepping value according to the second color gamut difference value and the current fine adjustment times;
s37, judging whether the color gamut stepping value is larger than a preset color gamut adjusting value or not, wherein,
and if the color gamut stepping value is larger than a 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 obtain a second test image of the LED screen in another test color state for quick adjustment.
4. The LED panel module uniformity correction method of claim 3, wherein said step of constructing a color gamut step value according to said second color gamut difference value and the current number of fine adjustments comprises:
and calculating a color gamut stepping value D according to the formula D = M/N, wherein M is a second color gamut difference value, and N is the current fine adjustment times.
5. The LED screen module uniformity correction method of any of claims 1-4, wherein the color gamut values comprise a luminance value, a horizontal axis coordinate value in color coordinates, and a vertical axis coordinate value in color coordinates.
6. The LED panel module uniformity correction method of claim 1, wherein said 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 displays white and other modules display black, and a fourth contrast image when a reference module in the LED screen displays 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.
7. The LED screen module uniformity correction method of claim 1, further comprising adjusting the camera's shooting parameters, said adjusting the camera's shooting parameters comprising:
s41, setting the aperture value and the photosensitive speed value of the camera to be the lowest values;
s42, enabling the LED screen to be in a color testing state;
s43, starting from the lowest shutter value, sequentially increasing the shutter values of the camera according to a preset interval and shooting;
s44, when the RGB value of the reference module in the shot picture is larger than a preset reference range, sequentially reducing the shutter value of the camera according to a preset interval from the current shutter value and shooting;
s45, when the RGB value of the reference module in the shot picture is in the reference range, adjusting is completed;
s46, returning to the step S42 to enable the LED screen to be in another test color state.
8. The LED panel module uniformity correction method of claim 1, wherein the color gamut value of the target module is adjusted rapidly by a product operation and/or is adjusted finely by an add-subtract operation.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 8.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211401797.7A CN115690065B (en) | 2022-11-10 | 2022-11-10 | LED screen module consistency correction method, computer equipment and readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211401797.7A CN115690065B (en) | 2022-11-10 | 2022-11-10 | LED screen module consistency correction method, computer equipment and readable storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115690065A true CN115690065A (en) | 2023-02-03 |
| CN115690065B CN115690065B (en) | 2024-05-10 |
Family
ID=85049587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211401797.7A Active CN115690065B (en) | 2022-11-10 | 2022-11-10 | LED screen module consistency correction method, computer equipment and readable storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115690065B (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2277723C (en) * | 1994-06-23 | 2000-09-12 | Aaron Fenster | Method and system for constructing and displaying three-dimensional images |
| WO2008148291A1 (en) * | 2007-06-05 | 2008-12-11 | Vtron Technologies Ltd. | Device and method for calibrating multi-screen wall |
| CN101866621A (en) * | 2010-06-03 | 2010-10-20 | 北京中庆微数字设备开发有限公司 | LED display screen correction system and method |
| CN102231251A (en) * | 2011-06-21 | 2011-11-02 | 华南理工大学 | Camera photo-based method for point-by-point inhomogeneous analysis and correction of LED (Light Emitting Diode) |
| CN104185003A (en) * | 2014-08-21 | 2014-12-03 | 深圳市奥拓电子股份有限公司 | Method and device for adjusting color temperature of video image |
| US20140368551A1 (en) * | 2013-06-12 | 2014-12-18 | Lighthouse Technologies (Huizhou) Limited | Chromaticity adjustment for led video screens |
| US20170033154A1 (en) * | 2015-05-06 | 2017-02-02 | Glux Visual Effects Tech(Shenzhen) Co., Ltd. | Variable led display screen |
| KR101962646B1 (en) * | 2018-12-17 | 2019-03-27 | (주)서울기전 | LED Module Brightness and Color Compensation Apparatus and Method thereof |
| CN112071257A (en) * | 2020-07-31 | 2020-12-11 | 佛山市青松科技股份有限公司 | LED screen correction method and device, storage medium and LED screen |
| CN113191988A (en) * | 2021-05-31 | 2021-07-30 | 浙江大华技术股份有限公司 | Brightness correction method and device, storage medium and electronic device |
| US20210349617A1 (en) * | 2020-05-11 | 2021-11-11 | Apple Inc. | System, Method and User Interface for Supporting Scheduled Mode Changes on Electronic Devices |
| US20210366411A1 (en) * | 2018-08-31 | 2021-11-25 | Xi'an Novastar Tech Co., Ltd. | Correction method, correction device and correction system for free full-screen splicing |
| ES2886126T3 (en) * | 2018-03-23 | 2021-12-16 | Leyard Optoelectronic Co Ltd | LED display device |
| CN114120895A (en) * | 2021-11-17 | 2022-03-01 | 湖南国天电子科技有限公司 | PWM-based rotary LED screen brightness correction method |
| CN114187865A (en) * | 2021-11-03 | 2022-03-15 | 北京易美新创科技有限公司 | Image processing method and device for LED display screen and control card |
| WO2022120799A1 (en) * | 2020-12-11 | 2022-06-16 | 京东方科技集团股份有限公司 | Image processing method and apparatus, electronic device, and storage medium |
-
2022
- 2022-11-10 CN CN202211401797.7A patent/CN115690065B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2277723C (en) * | 1994-06-23 | 2000-09-12 | Aaron Fenster | Method and system for constructing and displaying three-dimensional images |
| WO2008148291A1 (en) * | 2007-06-05 | 2008-12-11 | Vtron Technologies Ltd. | Device and method for calibrating multi-screen wall |
| CN101866621A (en) * | 2010-06-03 | 2010-10-20 | 北京中庆微数字设备开发有限公司 | LED display screen correction system and method |
| CN102231251A (en) * | 2011-06-21 | 2011-11-02 | 华南理工大学 | Camera photo-based method for point-by-point inhomogeneous analysis and correction of LED (Light Emitting Diode) |
| US20140368551A1 (en) * | 2013-06-12 | 2014-12-18 | Lighthouse Technologies (Huizhou) Limited | Chromaticity adjustment for led video screens |
| CN104185003A (en) * | 2014-08-21 | 2014-12-03 | 深圳市奥拓电子股份有限公司 | Method and device for adjusting color temperature of video image |
| PT3113161T (en) * | 2015-05-06 | 2019-09-30 | Glux Visual Effects Tech Shenzhen Co Ltd | Variable led display screen |
| US20170033154A1 (en) * | 2015-05-06 | 2017-02-02 | Glux Visual Effects Tech(Shenzhen) Co., Ltd. | Variable led display screen |
| ES2886126T3 (en) * | 2018-03-23 | 2021-12-16 | Leyard Optoelectronic Co Ltd | LED display device |
| US20210366411A1 (en) * | 2018-08-31 | 2021-11-25 | Xi'an Novastar Tech Co., Ltd. | Correction method, correction device and correction system for free full-screen splicing |
| KR101962646B1 (en) * | 2018-12-17 | 2019-03-27 | (주)서울기전 | LED Module Brightness and Color Compensation Apparatus and Method thereof |
| US20210349617A1 (en) * | 2020-05-11 | 2021-11-11 | Apple Inc. | System, Method and User Interface for Supporting Scheduled Mode Changes on Electronic Devices |
| CN112071257A (en) * | 2020-07-31 | 2020-12-11 | 佛山市青松科技股份有限公司 | LED screen correction method and device, storage medium and LED screen |
| WO2022120799A1 (en) * | 2020-12-11 | 2022-06-16 | 京东方科技集团股份有限公司 | Image processing method and apparatus, electronic device, and storage medium |
| CN113191988A (en) * | 2021-05-31 | 2021-07-30 | 浙江大华技术股份有限公司 | Brightness correction method and device, storage medium and electronic device |
| CN114187865A (en) * | 2021-11-03 | 2022-03-15 | 北京易美新创科技有限公司 | Image processing method and device for LED display screen and control card |
| CN114120895A (en) * | 2021-11-17 | 2022-03-01 | 湖南国天电子科技有限公司 | PWM-based rotary LED screen brightness correction method |
Non-Patent Citations (1)
| Title |
|---|
| 谢欢等: "基于机器视觉的LED大屏幕亮度一致性检测与矫正", 《南京大学学报（自然科学）》, vol. 55, no. 02, 20 March 2019 (2019-03-20), pages 170 - 179 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115690065B (en) | 2024-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101165026B1 (en) | Image correction data generation system, image correction data generation method, image correction data generation program, and image correction circuit | |
| CN101692326B (en) | System and method for on-site point-by-point calibration of brightness and chrominance of the whole screen of LED display screen | |
| CN103327259B (en) | The parameter regulation means of LED display correction camera and device | |
| CN102034407B (en) | Light-emitting diode screen color and brightness adjustment method and system | |
| US8760445B2 (en) | Method of correcting brightness of electronic display | |
| WO2008148291A1 (en) | Device and method for calibrating multi-screen wall | |
| CN105185314A (en) | Uniformity compensation method for LED display screen | |
| CN105096815A (en) | Method for correcting brightness and chrominance of LED display screen, and LED display screen system | |
| CN110322830B (en) | LED screen brightness correction method and device | |
| CN111968590B (en) | Picture display adjusting method and device, storage medium and display equipment | |
| US9508281B2 (en) | Apparatus and method for image analysis and image display | |
| CN111640391A (en) | Display screen display adjusting method and system | |
| CN105103541A (en) | Pattern position detection method, pattern position detection system, and image quality adjustment technique using pattern position detection method and pattern position detection system | |
| JPWO2003103298A1 (en) | Multi-projection system and correction data acquisition method in multi-projection system | |
| US7161558B1 (en) | Calibration system for an electronic sign | |
| CN106782347B (en) | Correct the method and device of LED backlight display white point | |
| CN115460386A (en) | Method and system for acquiring color image by using black and white camera | |
| CN114093292A (en) | Brightness parameter correction method, device and equipment and brightness compensation system | |
| CN113160090A (en) | Image correction method and device | |
| CN114613315A (en) | Gamma curve learning method and LED display controller | |
| CN115690065B (en) | LED screen module consistency correction method, computer equipment and readable storage medium | |
| JP2016525723A (en) | Movie projection measurement | |
| CN112435637B (en) | Brightness compensation method, brightness compensation equipment and brightness compensation system of curved screen | |
| CN114730548B (en) | Method and device for adjusting white balance of spliced screen, electronic equipment and medium | |
| CN113810677A (en) | Screen brightness adjusting method, terminal and readable storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |