CN106898328B - Screen color correction method and device - Google Patents
Screen color correction method and device Download PDFInfo
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- CN106898328B CN106898328B CN201710318408.7A CN201710318408A CN106898328B CN 106898328 B CN106898328 B CN 106898328B CN 201710318408 A CN201710318408 A CN 201710318408A CN 106898328 B CN106898328 B CN 106898328B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000000694 effects Effects 0.000 claims abstract description 31
- 230000009191 jumping Effects 0.000 claims abstract description 8
- 239000003086 colorant Substances 0.000 claims description 8
- 235000019646 color tone Nutrition 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 4
- 230000004075 alteration Effects 0.000 description 5
- 230000002411 adverse Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Processing Of Color Television Signals (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a method and a device for correcting color of a screen, wherein the method comprises the following steps: 1) introducing color adjusting points at four corners of the screen; 2) adjusting the RGB color values of each toning point; 3) judging whether the picture display effect of each position on the screen observed at a certain position in front of the screen is consistent, namely, the color cast phenomenon does not occur; 4) if yes, jumping to step 5), otherwise, jumping to step 2); 5) the value of each shading point is saved. By the technical scheme, the display effect of the picture at each position on the screen is kept consistent, and better shooting and watching effects are obtained.
Description
Technical Field
The invention relates to the technical field of data display, in particular to a screen color correction method and device.
Background
LED screens are used in a wide variety of applications in program production, display and advertising applications. However, due to the structural characteristics of the LED screen, the camera has chromatic aberration when shooting at different viewing angles at fixed positions. The color adjustment of the LED screen on the market is based on the whole screen, and the problem of chromatic aberration cannot be solved in a targeted manner.
The LED display uses the tiny three primary colors (red, green and blue) LED lamps to be combined and arranged to display the content, so that the luminous lamp groups seen at different viewing angles have different color difference display, for example, the left side shows that the green lamp part is more green, and the right side shows that the blue lamp part is more blue, which has great adverse effect on the screen viewing and shooting effects.
The LED display uses the tiny three primary colors (red, green and blue) LED lamps to be combined and arranged to display the content, so that the luminous lamp groups seen at different viewing angles have different color difference display, for example, the left side shows that the green lamp part is more green, and the right side shows that the blue lamp part is more blue, which has great adverse effect on the screen viewing and shooting effects. The camera can normally display color and color temperature when shooting the LED screen just opposite to the screen, and shooting at a certain angle of each screen can not be guaranteed when a plurality of screens are spliced, so that the appearance of a 'yin-yang' screen can appear, and the display effect and the unified picture expression of the LED can be greatly damaged.
The existing screen color correction method is based on the whole screen, and the RGB value is added on each pixel on the screen by using software to correct the color of the picture, video or three-dimensional scene displayed on the screen. However, the LED screen uses a combination of tiny three primary color (red, green, blue) LED lamps to display the content, so that the light emitting lamp sets viewed at different viewing angles will have different color differences. The existing method does not solve the problem of chromatic aberration generated by the structural characteristics of an LED screen.
Disclosure of Invention
Aiming at the problem that the existing LED screen cannot solve the color difference caused by the structural characteristics of the LED screen, the system cannot perform color correction based on the whole screen. The invention needs to start from four corners in the screen and gradually correct the color, so that the display effect of the picture at each position on the screen is kept consistent, and the color cast phenomenon is avoided. The effect that the multi-screen display contents are watched at any angle is uniform, and the overall consistent picture effect presentation is provided for the watching of audiences and the shooting of programs.
In order to solve the technical problem, the invention provides a screen color correction method, which comprises the following steps:
1) introducing color adjusting points at four corners of the screen;
2) adjusting the RGB color values of each toning point;
3) judging whether the picture display effect of each position on the screen observed at a certain position in front of the screen is consistent, namely, the color cast phenomenon does not occur;
4) if yes, jumping to step 5), otherwise, jumping to step 2);
5) the value of each shading point is saved.
Preferably, the color value of the color adjusting point and the color data of the screen center point are changed in a fitting manner.
Preferably, in the step 3), the camera is fixed at a certain position in front of the screen, and the screen is watched, so as to determine whether the picture display effects at each position on the screen are consistent.
Preferably, the RGB color values of the individual tinting dots are adjusted by running the tinting software.
Preferably, the RGB values of the two tinting dots at the upper left and lower left of the screen are both adjusted to (1.18,0,1.18), and the RGB values of the two tinting dots at the upper right and lower right of the screen are both adjusted to (1.18,1.18, 0).
In order to solve the above technical problem, the present invention provides a screen color correction device, including:
the color matching device is used for adjusting the RGB color values of the four color matching points on the screen;
the color cast judging device judges whether the picture display effect of each position on the screen observed at a certain position in front of the screen is consistent, namely, the color cast phenomenon does not occur;
and a color-tone value holding means for holding the adjusted value of each color tone point.
Preferably, the color value of the color adjusting point and the color data of the screen center point are changed in a fitting manner.
Preferably, the color cast determination device is a camera.
Preferably, the RGB values of the two tinting dots at the upper left and lower left of the screen are both adjusted to (1.18,0,1.18), and the RGB values of the two tinting dots at the upper right and lower right of the screen are both adjusted to (1.18,1.18, 0).
In order to solve the above technical problem, the present invention provides a screen color correction system, including: the system comprises an LED display screen, an HDMI connecting wire, a camera and a computer;
the HDMI connecting line is connected with the LED display screen and the computer;
the camera is positioned at a certain position in front of the LED display screen;
the computer colors the LED display screen through the HDMI;
introducing color adjusting points at four corners of the LED display screen;
adjusting, by the computer, the RGB color values of each of the tinting dots;
whether the image display effects of all positions on the LED display screen are consistent or not is observed through the camera, namely, the color cast phenomenon does not occur; and if the color values are consistent, the value of each color adjusting point is stored, the color correction of the LED screen is completed, otherwise, the RGB color value of each color adjusting point is continuously adjusted through the computer.
To solve the above technical problem, the present invention provides a computer storage medium comprising computer program instructions which, when executed, perform one of the methods described above.
The technical scheme of the invention achieves the following technical effects:
the problem of color difference is caused when a camera shoots or a viewer watches the three-dimensional space displayed by the LED display screen at different visual angles at fixed positions. The display effect of the picture at each position on the screen is kept consistent, and better shooting and watching effects are obtained.
Drawings
FIG. 1 is a system configuration diagram of the present invention
FIG. 2 is a flow chart of color correction according to the present invention
Detailed Description
The color correction mode of the screen is characterized in that the required devices are as follows: the system comprises an LED display screen, a control computer, color correction software and a high-definition camera.
The control computer controls the LED screen through an HDMI line.
In order to solve the problem of chromatic aberration generated by structural characteristics of an LED screen, color adjusting points are introduced into four corners of the screen by the system, colors can be artificially set by adjusting RGB color values of the color adjusting points, and the color values of the color adjusting points and the color value of the central point of the screen are in fitting change. After the system loads and displays the materials such as pictures, videos or three-dimensional scenes on the screen, the camera is fixed at a constant position to watch the screen, color correction software in a control computer is operated, RGB color values on each color mixing point are manually adjusted until the display effect of the picture at each position on the screen is kept consistent through final picture judgment, and the color cast phenomenon is avoided. The toned screen is like a layer of toning layer superimposed on the original picture.
As shown in fig. 1, the scheme uses a large-screen LED display screen; a computer is used as a control computer. The camera uses a high-definition camera. The HDMI line is 5M autumn leaforiginal Q542. The control computer is connected with the LED display screen through the HDMI line. The camera is fixed at a distance of two meters from the screen and faces the screen. After the control computer loads pictures to display on the LED screen, pictures shot by the camera from the left side are green, and pictures shot from the right side are blue. The two tinting dots on the left therefore compensate for the two colors other than green, red and blue, and the tinting dot test on the right compensates for red and green. And running color correction software in the control computer, manually adjusting the RGB color values on each color mixing point until the final picture is judged, and determining that the display effect of the picture at each position on the screen is consistent without color cast. The last parameters input are: the RGB values of the two tinting dots at the top left and bottom left of the screen are both adjusted to (1.18,0,1.18), and the RGB values of the two tinting dots at the top right and bottom right are both adjusted to (1.18,1.18, 0).
The LED (light Emitting diode) is a light Emitting diode, and the LED display uses a combination of fine three primary color (red, green, blue) LED lamps to display the content, so that the light Emitting lamp groups viewed at different viewing angles have different color difference displays, for example, the left side sees the green lamp part more than green, and the right side sees the blue lamp part more than blue, which has a great adverse effect on the viewing and shooting screen effect. (ii) a The RGB (RED GREEN BLUE) refers to the three primary colors of red, GREEN and blue; the hdmi (high Definition Multimedia interface) refers to a high Definition Multimedia interface, and is a specific audio/video control interface.
Referring to fig. 1, a color matching control flow chart of the present invention specifically includes the following color matching steps:
1) introducing color adjusting points at four corners of the screen;
in order to solve the problem of chromatic aberration generated by structural characteristics of an LED screen, color adjusting points are introduced into four corners of the screen by the system, and the color adjusting points can be used for artificially setting colors by adjusting RGB color values.
2) And adjusting the RGB color value of each color adjusting point.
The color value of the toning point and the color value of the central point of the screen are changed in a fitting manner. After the materials such as pictures, videos or three-dimensional scenes are loaded and displayed on the screen, the camera is fixed at a constant position to watch the screen, color correction software in a control computer is operated, and RGB color values on each color adjusting point are manually adjusted.
3) And judging whether the picture display effect of each position on the screen observed at a certain position in front of the screen is consistent, namely, the color cast phenomenon does not occur.
And determining that the display effect of the picture at each position on the screen is consistent through final picture judgment, and avoiding color cast. The toned screen is like a layer of toning layer superimposed on the original picture.
4) If yes, jumping to step 5), otherwise, jumping to step 2);
5) the value of each shading point is saved.
And storing the color adjusting value in color correcting software, wherein a memory is also arranged in the screen and used for storing the color adjusting value so as to adjust the color of the displayed image by adopting the adjusted color adjusting value when the screen is used for displaying in the subsequent process, thereby ensuring that the image seen before the screen has no color difference change.
Preferably, the last input parameters are: the RGB values of the two tinting dots at the top left and bottom left of the screen are both adjusted to (1.18,0,1.18), and the RGB values of the two tinting dots at the top right and bottom right are both adjusted to (1.18,1.18, 0).
The invention also provides a screen color correction device, which comprises:
the color matching device is used for adjusting the RGB color values of the four color matching points on the screen;
the color cast judging device judges whether the picture display effect of each position on the screen observed at a certain position in front of the screen is consistent, namely, the color cast phenomenon does not occur;
and a color-tone value holding means for holding the adjusted value of each color tone point.
And the color numerical value of the color adjusting point and the color data of the central point of the screen are changed in a fitting manner.
The color cast judging device is preferably a camera or other image/video shooting device.
Preferably, the RGB values of the two tinting dots at the upper left and lower left of the screen are both adjusted to (1.18,0,1.18), and the RGB values of the two tinting dots at the upper right and lower right of the screen are both adjusted to (1.18,1.18, 0).
The present invention also provides a computer storage medium comprising computer program instructions which, when executed, perform a method according to one of the above. The computer storage medium may be a readable and writable memory, such as a hard disk, a magnetic disk, a FLASH memory, or a read-only memory, such as an optical disk.
The screen comprises a processor and a computer storage medium, and the color correction method is realized by executing computer program instructions on the computer storage medium through the processor.
By the technical scheme provided by the invention, the problem of color difference generated by the three-dimensional space displayed by the LED display screen shot by a camera or watched by audiences at different visual angles at fixed positions can be solved. The display effect of the picture at each position on the screen is kept consistent, and better shooting and watching effects are obtained.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be protected within the protection scope of the present invention.
Claims (10)
1. A method of screen color correction for an LED display screen, the method comprising the steps of:
1) introducing color adjusting points at four corners of the screen;
2) adjusting the RGB color values of each toning point;
3) judging whether the picture display effect of each position on the screen observed at a certain position in front of the screen is consistent, namely, the color cast phenomenon does not occur;
4) if yes, jumping to step 5), otherwise, jumping to step 2);
5) the value of each shading point is saved.
2. The method of claim 1, wherein the color values of the shading points and the color data of the screen center point are changed in a fitting manner.
3. The method according to claim 1, wherein in the step 3), whether the picture display effect of each position on the screen is consistent is judged by fixing the camera at a position in front of the screen and watching the screen.
4. The method of claim 1, wherein the RGB values of the two tinting dots on the top left and bottom left of the screen are each adjusted to (1.18,0,1.18), and the RGB values of the two tinting dots on the top right and bottom right of the screen are each adjusted to (1.18,1.18, 0).
5. A screen color correction device for an LED display screen, the device comprising:
the color matching device is used for adjusting the RGB color values of the four color matching points on the screen;
the color cast judging device judges whether the picture display effect of each position on the screen observed at a certain position in front of the screen is consistent, namely, the color cast phenomenon does not occur;
and a color-tone value holding means for holding the adjusted value of each color tone point.
6. The apparatus of claim 5, the color values of the shading points and the color data of the screen center point varying as a fit.
7. The apparatus of claim 5, wherein the color cast determination device is a camera.
8. The apparatus of claim 5, the RGB values of the two tinting dots on the top left and bottom left of the screen are both adjusted to (1.18,0,1.18), and the RGB values of the two tinting dots on the top right and bottom right of the screen are both adjusted to (1.18,1.18, 0).
9. A screen color correction system for an LED display screen, the system comprising: the system comprises an LED display screen, an HDMI connecting wire, a camera and a computer;
the HDMI connecting line is connected with the LED display screen and the computer;
the camera is positioned at a certain position in front of the LED display screen;
the computer colors the LED display screen through the HDMI;
introducing color adjusting points at four corners of the LED display screen;
adjusting, by the computer, the RGB color values of each tinting point;
whether the image display effects of all positions on the LED display screen are consistent or not is observed through the camera, namely, the color cast phenomenon does not occur; and if the color values are consistent, the value of each color adjusting point is stored, the color correction of the LED screen is completed, otherwise, the RGB color value of each color adjusting point is continuously adjusted through the computer.
10. A computer storage medium comprising computer program instructions which, when executed, perform the method of any of claims 1-4.
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| CN201710318408.7A CN106898328B (en) | 2017-05-08 | 2017-05-08 | Screen color correction method and device |
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| CN201710318408.7A CN106898328B (en) | 2017-05-08 | 2017-05-08 | Screen color correction method and device |
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| CN106898328B true CN106898328B (en) | 2019-12-31 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107545865A (en) * | 2017-09-01 | 2018-01-05 | 北京德火新媒体技术有限公司 | A kind of more seat in the plane multi-angle LED display color calibrating methods and system |
| CN112309317A (en) * | 2020-10-22 | 2021-02-02 | 北京虚拟动点科技有限公司 | Screen color difference compensation method, device and system, electronic equipment and storage medium |
| CN115050341B (en) * | 2022-08-15 | 2022-12-09 | 广州朗国电子科技股份有限公司 | Method and device for uniformly adjusting screen color and storage medium |
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