CN116009801A - Color calibration method, storage medium and related equipment - Google Patents

Abstract

The application provides a color standard correction method, a storage medium and related equipment, and belongs to the technical field of display. The method comprises the following steps: receiving a 3D display lookup table corresponding to the first preset color temperature, and performing color quasi correction on a display picture with the color temperature being the first preset color temperature according to the 3D display lookup table; processing the corrected display picture to obtain a first white field picture; and adjusting the color temperature of the first white field picture to a target color temperature for white balance correction, wherein the target color temperature comprises a second preset color temperature and a third preset color temperature. In the application, the piecewise function is adopted to replace the fitting of the whole section of polynomial, so that the RGB spectrum tristimulus value and the brightness of the display device are closer to the original value, thereby reducing larger errors caused by polynomial fitting and improving the color correction effect. In the application, the color quasi correction under three color temperatures can be completed only by receiving the 3D display lookup table under one color temperature, the color quasi correction time length of a display picture is reduced, and the color quasi correction efficiency is improved.

Description

Color calibration method, storage medium and related equipment

Technical Field

The present application relates to the field of display technology, and in particular to a color accuracy correction method, a storage medium and related equipment.

Background Art

Before a display device leaves the factory, it is necessary to calibrate the color accuracy of the display screen of the display device.

The display screen needs to be calibrated for color accuracy at standard color temperature, warm color temperature, and cool color temperature.

At present, the color accuracy of the display screen is corrected by using a 3D display lookup table corresponding to the color temperature, and the display screen needs to be corrected for color accuracy at three different color temperatures, that is, a 3D display lookup table merged from three 3D display lookup tables is needed to correct the color accuracy of the display screen. However, the merged 3D display lookup table is large, and it takes a long time to transmit the merged 3D display lookup table to the device, resulting in a long time for color accuracy correction of the display screen, that is, the color accuracy correction efficiency is low.

Summary of the invention

The present application provides a color correction method, a storage medium and related equipment to solve the problem of low color correction efficiency.

In a first aspect, the present application provides a color accuracy correction method, comprising:

receiving a 3D display lookup table corresponding to a first preset color temperature, and performing color accuracy correction on a display picture having a color temperature of the first preset color temperature according to the 3D display lookup table;

Processing the corrected display picture to obtain a first white field picture;

The color temperature of the first white field picture is adjusted to a target color temperature for white balance correction, wherein the target color temperature includes a second preset color temperature and a third preset color temperature.

In one embodiment, the step of adjusting the color temperature of the first white field picture to a target color temperature for white balance correction includes:

Adjusting the color temperature of the first white field image to a first preset color temperature and a second preset color temperature respectively to perform white balance correction;

Alternatively, the color temperature of the first white field picture is adjusted to the second preset color temperature for white balance correction, and after the white balance correction is completed, the picture obtained after the white balance correction is processed to obtain a second white field picture, and the color temperature of the second white field picture is adjusted to the third preset color temperature for white balance correction.

In one embodiment, after the step of adjusting the color temperature of the first white field picture to the target color temperature for white balance correction, the method further includes:

Acquire the actual chromaticity value of the pixel in the display image after correction, and acquire the standard chromaticity value of the pixel;

Determine the color difference according to the actual color value and the standard color value;

When the color difference is less than or equal to the preset color difference, it is determined that the color correction is successful, and the 3D display lookup table is written to the display device that performs the color correction.

In one embodiment, after the step of determining the color difference according to the actual chromaticity value and the standard chromaticity value, the method further includes:

When the color difference is greater than the preset color difference, a prompt message indicating that the color correction has failed is output.

In one embodiment, the step of adjusting the color temperature of the first white field picture to a target color temperature for white balance correction includes:

Acquire the brightness of the first white field picture;

When the brightness is greater than a preset brightness, the color temperature of the first white field picture is adjusted to a target color temperature to perform white balance correction.

In one embodiment, after the step of obtaining the brightness of the first white field picture, the method further includes:

When the brightness is less than or equal to the preset brightness, a prompt message indicating that the color accuracy correction has failed is output.

In a second aspect, the present invention provides a color calibration device, comprising:

A receiving module, configured to receive a 3D display lookup table corresponding to a first preset color temperature, and perform color accuracy correction on a display image of a display device according to the 3D display lookup table;

A processing module, used for processing the corrected display picture to obtain a first white field picture;

A correction module is used to adjust the color temperature of the first white field picture to a target color temperature for white balance correction, wherein the target color temperature includes a second preset color temperature and a third preset color temperature.

In a second aspect, the present invention provides a color calibration device, comprising: a display screen, a memory, and a processor;

The display screen is used to display images;

The memory stores computer-executable instructions;

The processor executes the computer-executable instructions stored in the memory, so that the color correction device performs the color correction method as described above.

In a third aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the color accuracy correction method as described above.

In a fourth aspect, the present invention provides an electronic device, wherein computer execution instructions are stored in the electronic device, and when the computer execution instructions are executed by a processor, they are used to implement the color accuracy correction method as described above.

The color accuracy correction method, storage medium and computer-readable storage medium provided by the present application receive a 3D display lookup table corresponding to a first preset color temperature, and perform color accuracy correction on a display screen having a color temperature of the first preset color temperature according to the 3D display lookup table, and process the corrected display screen to obtain a white field screen, and finally adjust the color temperature of the white field screen to a target color temperature for white balance correction. In the present invention, a 3D display lookup table at one color temperature is first used to perform color accuracy correction on the display screen, and then the color temperature of the corrected white field screen is adjusted to the target color temperature for white balance correction, and the target color temperature includes the other two color temperatures, that is, the present invention only needs to receive a 3D display lookup table at one color temperature to complete the color accuracy correction of the display screen at three color temperatures, which reduces the transmission time of the 3D display lookup table, reduces the color accuracy correction time of the display screen, and improves the color accuracy correction efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

FIG1 is a schematic diagram of a flow chart of a first embodiment of a color calibration method of the present application;

FIG2 is a schematic diagram of a flow chart of a second embodiment of a color calibration method of the present application;

FIG3 is a schematic diagram of a detailed flow chart of step S30 in the third embodiment of the color accuracy correction method of the present application;

FIG4 is a schematic diagram of the functional modules of the color accuracy correction device of the present application;

FIG5 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

The above drawings have shown clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments.

DETAILED DESCRIPTION

Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

It should be noted that due to space limitations, this application description does not list all optional implementation methods. After reading this application description, those skilled in the art should be able to understand that as long as the technical features do not contradict each other, any combination of technical features can constitute an optional implementation method.

For example, in one implementation of the embodiment, a technical feature is recorded: the color temperature of the first white field picture is adjusted to the first preset color temperature and the second preset color temperature respectively for white balance correction. In another implementation of the embodiment, another technical feature is recorded: the color temperature of the first white field picture is adjusted to the second preset color temperature for white balance correction, and after the white balance correction is completed, the picture obtained after the white balance correction is processed to obtain a second white field picture, and the color temperature of the second white field picture is adjusted to the third preset color temperature for white balance correction. Since the above two technical features are not contradictory to each other, after reading the specification of this application, a person skilled in the art should be able to think that an implementation method having both features is also an optional implementation method, that is, if the first preset color temperature is between the second preset color temperature and the third preset temperature, the color temperature of the first white field picture is adjusted to the first preset color temperature and the second preset color temperature respectively for white balance correction; if the first preset temperature is greater than or less than the second preset temperature and the third preset temperature, the color temperature of the first white field picture is adjusted to the second preset color temperature for white balance correction, and after the white balance correction is completed, the picture obtained after the white balance correction is processed to obtain the second white field picture, and the color temperature of the second white field picture is adjusted to the third preset color temperature for white balance correction.

Non-contradictory technical features recorded in different embodiments may also be arbitrarily combined to form optional implementation methods.

For example, the first embodiment records: adjusting the color temperature of the first white field picture to the second preset color temperature for white balance correction, and after the white balance correction is completed, processing the picture obtained after the white balance correction to obtain a second white field picture, and adjusting the color temperature of the second white field picture to the third preset color temperature for white balance correction. In order to control the length of the specification of this application, this feature is not recorded in the first and second embodiments. However, after reading the specification of this application, those skilled in the art should be able to think that the color accuracy correction method provided in the first and second embodiments may also include this feature.

The embodiments of the present application are described in detail below.

Referring to FIG. 1 , FIG. 1 is a first embodiment of the color calibration method of the present application, and the color calibration method comprises the following steps:

Step S10 , receiving a 3D display lookup table corresponding to a first preset color temperature, and performing color accuracy correction on a display image having a color temperature of the first preset color temperature according to the 3D display lookup table.

In this embodiment, the execution subject is a color correction device, and the color correction device is a display device. For the convenience of description, the device is used below to refer to the color correction device. The device needs to correct three color temperatures, namely a first preset color temperature, a second preset color temperature, and a third preset color temperature. The first preset color temperature, the second preset color temperature, and the third color temperature are one of the standard color temperature 9300K, the cold color temperature 12000K, and the warm color temperature 6500K, and the first preset color temperature, the second preset color temperature, and the third preset color temperature are different.

Before color calibration of the display device, preparation work is required. Specifically, the device uses a scanner to scan the display device and record the ID of the display device for color calibration. The device is connected to a color analyzer to collect data from the display device, and the collected data is R, G, B, and W. The device performs a mapping calculation based on the collected data and the color space to be calibrated, thereby obtaining a 3D display lookup table under the first preset color temperature, that is, a 3dlut table.

The collected data are R(255,0,0), G(0,255,0), and B(0,0,255), and the 3*3 matrix M in the color space is known, so the theoretical XYZ corresponding to RGB can be calculated based on the following formula.

Calculate the 3*3 matrix M ^-1 of the display screen. Specifically, use the collected R(255,0,0), G(0,255,0), B(0,0,255) and X', Y' and Z' to calculate and obtain the 3*3 matrix M ^-1 of the screen.

Measure the actual X, Y, and Z of R(255,0,0), G(0,255,0), and B(0,0,255) to get the brightness value based on the following formula.

Finally, brightness interpolation is used to calculate the brightness corresponding to each RGB under the first preset color temperature, thereby obtaining a 3D display lookup table under 9300K. The 3D display lookup table can be specifically referred to Table-1:

Table-1

After obtaining the 3D display lookup table, the 3D display lookup table is sent to the device, that is, the device receives the 3D display lookup table at the first preset color temperature. The device then performs color calibration on the display screen with the color temperature of the first preset color temperature according to the 3D display lookup table. Specifically, the color temperature of the display screen of the display device is adjusted to the first preset color temperature, and then the corresponding R', G' and B' are found from the 3D display lookup table based on the RGB driving value of each pixel on the display screen, and finally the color calibration is performed through R', G' and B'.

Step S20, processing the corrected display picture to obtain a first white field picture.

After completing the correction of the display picture, the device processes the corrected display picture to obtain a first white field picture, that is, performs white field setting on the corrected display picture to obtain the first display picture.

Step S30, adjusting the color temperature of the first white field image to a target color temperature for white balance correction, wherein the target color temperature includes a second preset color temperature and a third preset color temperature.

The display device currently displays a first white field picture, and the device adjusts the color temperature of the first white field picture to a target color temperature for white balance correction. The target color temperature includes a second preset color temperature and a third preset color temperature, so the device can complete the color accuracy correction of the display device under three color temperatures.

It should be noted that the use of a 3D display lookup table to perform color accuracy correction at one color temperature requires 6 index switches, that is, the prior art requires 18 index switches to perform color accuracy correction. Index switching refers to returning to the 3D display lookup table to determine the value. The 3D display lookup table includes R, G, B, R', G' and B', so it needs to return six times. In this embodiment, the color accuracy of the display screen at this color temperature is adjusted through a 3D display lookup table of one color temperature, and the color accuracy correction at the other two color temperatures is corrected by white balance. Compared with the 18 index switches in the prior art, this embodiment only requires 6 times, and the implementation logic of color accuracy correction is simpler. In addition, the color accuracy correction at three color temperatures in this embodiment is 3D LUT (3D display lookup table) + 2*white balance. Compared with the 3*3D LUT correction method of the prior art, the color accuracy correction process is optimized, and there is no need to receive an excessively large merged 3D LUT, which shortens the color accuracy correction time and improves the color accuracy correction efficiency.

In the technical solution provided in this embodiment, a 3D display lookup table corresponding to a first preset color temperature is received, and a display screen having a color temperature of the first preset color temperature is color-corrected according to the 3D display lookup table, and the corrected display screen is processed to obtain a white field screen, and finally the color temperature of the white field screen is adjusted to the target color temperature for white balance correction. In the present invention, a 3D display lookup table under one color temperature is first used to perform color correction on the display screen, and then the color temperature of the corrected white field screen is adjusted to the target color temperature for white balance correction, and the target color temperature includes the other two color temperatures, that is, the present invention only needs to receive a 3D display lookup table under one color temperature to complete the color correction of the display screen under three color temperatures, which reduces the transmission time of the 3D display lookup table, reduces the color correction time of the display screen, and improves the color correction efficiency.

In one embodiment, step S20 includes:

The color temperature of the first white field image is adjusted to the first preset color temperature and the second preset color temperature respectively to perform white balance correction.

In this embodiment, after the display screen is processed as the first white screen, the color temperature of the first white screen is adjusted to the second preset color temperature and the third preset color temperature respectively for white balance correction, that is, after the color temperature of the first white screen is adjusted to the second preset color temperature and the white balance correction under the second preset color temperature is completed, the display screen is switched to the first white screen, and the device adjusts the color temperature of the first white screen to the third preset color temperature for white balance correction. For example, the first preset color temperature is 9300K, the second preset color temperature is 6500K, and the third preset color temperature is 12000K. The device adjusts the color temperature of the first white screen to 12000K for warm color white balance correction, and after the correction is completed, switches to the first white screen, and then adjusts the color temperature of the first white screen to 6500K for cold color white balance correction. After the cold color white balance correction is completed, the color of the screen is blue; and after the warm color white balance correction is completed, the color of the screen is yellowish red.

Alternatively, the color temperature of the first white field picture is adjusted to the second preset color temperature for white balance correction, and after the white balance correction is completed, the picture obtained after the white balance correction is processed to obtain a second white field picture, and the color temperature of the second white field picture is adjusted to the third preset color temperature for white balance correction.

In addition, the device first adjusts the color temperature of the first white field picture to the second preset color temperature for white balance correction. After the correction is completed, the corrected picture is processed to obtain the second white field picture, and the device then adjusts the color temperature of the second white field picture to the third preset color temperature for white balance correction. For example, if the first preset color temperature is 6500K, the color temperature of the first white field picture at 6500K is first adjusted to the second preset color temperature of 9300K for white balance correction, and the picture that has completed the white balance correction is set to a white field to obtain a second white field picture, and then the color temperature of the second white field picture is adjusted to the third preset color temperature of 12000K for warm color white balance correction.

In this embodiment, the device can calibrate the second preset color temperature and the color accuracy at the second preset color temperature in any of the above-mentioned ways.

Referring to FIG. 2 , FIG. 2 is a second embodiment of the color calibration method of the present invention. Based on the first embodiment, after step S30, the method further includes:

Step S40, obtaining the actual chromaticity value of the pixel in the calibrated display image, and obtaining the standard chromaticity value of the pixel.

Step S50, determining the color difference according to the actual chromaticity value and the standard chromaticity value.

Step S60: When the color difference is less than or equal to the preset color difference, it is determined that the color calibration is successful, and the 3D display lookup table is written to the display device for color calibration.

In this embodiment, after completing the color calibration at three color temperatures, the device needs to determine whether the color calibration is successful.

Specifically, the device obtains the color space XYZ corresponding to the RGB of the pixel point in the corrected display screen, and the actual chromaticity value of the pixel point can be obtained by converting the color space CIEXYZ and the color system CIELAB. The device also stores a standard table corresponding to CIELAB. The device obtains the standard chromaticity value corresponding to XYZ in the standard table. The device can determine the color difference based on the color difference calculation formula of ΔE2000, the actual chromaticity value and the standard chromaticity value. The color difference calculation formula of ΔE2000 is:

The device stores a preset color difference, which can be any suitable value. After determining the color difference, the color difference is compared with the preset color difference. If the color difference is less than or equal to the preset color difference, it is determined that the color correction is successful, and then the 3D display lookup is written to the display device for color correction. When the display device subsequently corrects the color, the color correction can be performed based on the 3D display lookup table.

When the color difference is greater than the preset color difference, a prompt message indicating that the color calibration has failed is output.

In the technical solution provided in this embodiment, the device obtains the actual chromaticity value of the pixel in the corrected display image, and obtains the standard chromaticity value of the pixel, so as to determine the color difference according to the actual chromaticity value and the standard chromaticity value. If the color difference is less than or equal to the preset color difference, it is determined that the color correction is successful, and the 3D display lookup table is written to the color-corrected display device.

Referring to FIG. 3 , FIG. 3 is a third embodiment of the color calibration method of the present invention. Based on the first or second embodiment, step S30 includes:

Step S31, obtaining the brightness of the first white field picture.

Step S32, when the brightness is greater than the preset brightness, the color temperature of the first white field image is adjusted to the target color temperature to perform white balance correction.

In this embodiment, after the device performs color calibration on the display image at the first preset color temperature, the device processes the calibrated display image to obtain a first white field image, and the device then obtains the brightness of the first white field image. The preset brightness is stored in the device, and the device compares the obtained brightness with the preset brightness. If the obtained brightness is greater than the preset brightness, it can be determined that the brightness meets the product requirements, and the device can adjust the color temperature of the first white field image to the target color temperature for white balance calibration, that is, perform color calibration at the other two color temperatures.

If the acquired brightness is less than or equal to the preset brightness, it can be determined that the brightness does not meet the product requirements. The device does not need to perform color calibration at the other two color temperatures. The device outputs a prompt message indicating that the color calibration failed, which means that the display device needs to be returned to the factory for remanufacturing.

In addition, when the color calibration is successful, the device will display a prompt message indicating that the device ID is successfully associated with the calibration. If the color calibration fails, the device ID will display a prompt message indicating that the calibration failed.

In the technical solution provided in this embodiment, the device obtains the brightness of the first white field picture. If the brightness is greater than the preset brightness, the device adjusts the color temperature of the first white field picture to the target color temperature for white balance correction to complete the color accuracy correction at all color temperatures. If the brightness is less than the preset brightness, the correction fails, and the color accuracy correction at the other two color temperatures is not performed wirelessly to avoid the device performing color accuracy correction on unqualified products.

The present application also provides a color calibration device. Referring to FIG. 4 , the color calibration device 400 includes:

The receiving module 410 is used to receive a 3D display lookup table corresponding to a first preset color temperature, and perform color accuracy correction on a display picture having a color temperature of the first preset color temperature according to the 3D display lookup table;

A processing module 420 is used to process the corrected display picture to obtain a first white field picture;

The correction module 430 is used to adjust the color temperature of the first white field picture to a target color temperature for white balance correction, wherein the target color temperature includes a second preset color temperature and a third preset color temperature.

In one embodiment, the color calibration device 400 includes:

The correction module 430 is used to adjust the color temperature of the first white field picture to the first preset color temperature and the second preset color temperature respectively to perform white balance correction;

Alternatively, the correction module 430 is used to adjust the color temperature of the first white field picture to the second preset color temperature for white balance correction, and after the white balance correction is completed, process the picture obtained after the white balance correction to obtain a second white field picture, and adjust the color temperature of the second white field picture to the third preset color temperature for white balance correction.

In one embodiment, the color calibration device 400 includes:

An acquisition module, used to acquire the actual chromaticity value of the pixel in the calibrated display image and acquire the standard chromaticity value of the pixel;

A determination module, used for determining the color difference according to the actual color value and the standard color value;

The determination module is used to determine that the color accuracy correction is successful when the color difference is less than or equal to the preset color difference, and write the 3D display lookup table to the display device performing the color accuracy correction.

In one embodiment, the color calibration device 400 includes:

The output module is used to output a prompt message indicating that the color calibration has failed when the color difference is greater than a preset color difference.

In one embodiment, the color calibration device 400 includes:

An acquisition module, used to acquire the brightness of the first white field picture;

The correction module 430 is used to adjust the color temperature of the first white field picture to the target color temperature for white balance correction when the brightness is greater than the preset brightness.

In one embodiment, the color calibration device 400 includes:

The output module is used to output a prompt message indicating that the color calibration has failed when the brightness is less than or equal to a preset brightness.

It should be noted that, when the color accuracy correction device provided in the above embodiment executes the color accuracy correction method, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the color accuracy correction device provided in the above embodiment and the color accuracy correction method embodiment belong to the same concept, and the implementation process thereof is detailed in the method embodiment, which will not be repeated here.

The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

The embodiment of the present application also provides a computer storage medium, which can store multiple instructions. The instructions are suitable for being loaded by a processor and executing the method steps of the above embodiment. The specific execution process can be found in the specific description of the embodiment shown in Figures 1 to 3, which will not be repeated here.

The device where the storage medium is located may be a display device.

Fig. 5 is a schematic diagram showing the structure of an electronic device according to an exemplary embodiment.

As shown in FIG. 5 , the electronic device 1000 may include: at least one processor 1001 , at least one network interface 1004 , a user interface 1003 , a memory 1005 , and at least one communication bus 1002 .

The communication bus 1002 is used to realize the connection and communication between these components.

The user interface 1003 may include a display screen (Display) and a camera (Camera), and the optional user interface 1003 may also include a standard wired interface and a wireless interface.

The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).

Among them, the processor 1001 may include one or more processing cores. The processor 1001 uses various interfaces and lines to connect various parts within the entire electronic device 1000, and executes various functions and processes data of the electronic device 1000 by running or executing instructions, programs, code sets or instruction sets stored in the memory 1005, and calling data stored in the memory 1005. Optionally, the processor 1001 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 1001 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processor (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 1001, and it can be implemented separately through a chip.

Among them, the memory 1005 may include a random access memory (Random Access Memory, RAM), and may also include a read-only memory (Read-Only Memory). Optionally, the memory 1005 includes a non-transitory computer-readable storage medium. The memory 1005 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 1005 may include a storage program area and a storage data area, wherein the storage program area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the storage data area may store data involved in the above various method embodiments, etc. The memory 1005 may also be at least one storage device located away from the aforementioned processor 1001. As shown in Figure 5, the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an operating application program of an electronic device.

In the electronic device 1000 shown in FIG. 5 , the user interface 1003 is mainly used to provide an input interface for the user and obtain data input by the user; and the processor 1001 can be used to call the operation application of the electronic device stored in the memory 1005, and specifically perform the following operations:

Receiving a 3D display lookup table corresponding to a first preset color temperature, and performing color accuracy correction on a display picture having a color temperature of the first preset color temperature according to the 3D display lookup table;

Processing the corrected display image to obtain a first white field image;

The color temperature of the first white field picture is adjusted to a target color temperature for white balance correction, wherein the target color temperature includes a second preset color temperature and a third preset color temperature.

In one embodiment, the operating system of the electronic device is an Android system. In the Android system, the processor 1001 further performs the following steps:

Adjusting the color temperature of the first white field image to the first preset color temperature and the second preset color temperature respectively to perform white balance correction;

Alternatively, the color temperature of the first white field picture is adjusted to the second preset color temperature for white balance correction, and after the white balance correction is completed, the picture obtained after the white balance correction is processed to obtain a second white field picture, and the color temperature of the second white field picture is adjusted to the third preset color temperature for white balance correction.

In one embodiment, the processor 1001 further performs the following steps:

Obtaining the actual chromaticity value of the pixel in the calibrated display image, and obtaining the standard chromaticity value of the pixel;

Determine the color difference based on the actual color value and the standard color value;

When the color difference is less than or equal to the preset color difference, it is determined that the color correction is successful, and the 3D display lookup table is written to the display device that performs the color correction.

In one embodiment, the processor 1001 further performs the following steps:

Obtaining the actual chromaticity value of the pixel in the calibrated display image, and obtaining the standard chromaticity value of the pixel;

Determine the color difference based on the actual color value and the standard color value;

When the color difference is less than or equal to the preset color difference, it is determined that the color correction is successful, and the 3D display lookup table is written to the display device that performs the color correction.

In one embodiment, the processor 1001 further performs the following steps:

Obtaining target information, the target information including at least one of the following: current time point, environmental parameters, voice information, meeting, and course;

When the target information meets the preset conditions, the teaching scene associated with the target information is displayed on the interactive interface.

In one embodiment, the processor 1001 further performs the following steps:

Get the brightness of the first white field image;

When the brightness is greater than the preset brightness, the color temperature of the first white field image is adjusted to the target color temperature to perform white balance correction.

In one embodiment, the processor 1001 further performs the following steps:

When the brightness is less than or equal to the preset brightness, a prompt message indicating that the color calibration failed is output.

Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

The present application is described with reference to the flowchart and/or block diagram of the method, device (system) and computer program product according to the embodiment of the present application. It should be understood that each process and/or box in the flowchart and/or block diagram, and the combination of the process and/or box in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for realizing the function specified in one process or multiple processes in the flowchart and/or one box or multiple boxes in the block diagram.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

In a typical configuration, a computing device includes one or more processors (CPU), input/output interfaces, network interfaces, and memory.

The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and/or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims (10)

1. A method for color correction, comprising:

receiving a 3D display lookup table corresponding to a first preset color temperature, and performing color quasi-correction on a display picture with the color temperature being the first preset color temperature according to the 3D display lookup table;

processing the corrected display picture to obtain a first white field picture;

and adjusting the color temperature of the first white field picture to a target color temperature for white balance correction, wherein the target color temperature comprises a second preset color temperature and a third preset color temperature.

2. The color correction method according to claim 1, wherein the step of adjusting the color temperature of the first white field picture to a target color temperature for white balance correction comprises:

respectively adjusting the color temperature of the first white field picture to a first preset color temperature and a second preset color temperature to carry out white balance correction;

or, adjusting the color temperature of the first white field picture to a second preset color temperature to perform white balance correction, processing the picture obtained by the white balance correction after the white balance correction is completed to obtain a second white field picture, and adjusting the color temperature of the second white field picture to a third preset color temperature to perform white balance correction.

3. The color correction method according to claim 1, wherein after the step of adjusting the color temperature of the first white field picture to a target color temperature for white balance correction, further comprising:

acquiring the corrected actual chromaticity value of the pixel point in the display picture, and acquiring the standard chromaticity value of the pixel point;

determining a color difference according to the actual chromaticity value and the standard chromaticity value;

and when the color difference is smaller than or equal to a preset color difference, determining that the color quasi-correction is successful, and writing the 3D display lookup table into display equipment for performing the color quasi-correction.

4. A color correction method according to claim 3, characterized in that after the step of determining a color difference from the actual chromaticity value and the standard chromaticity value, it further comprises:

and outputting prompt information of failure of color correction when the color difference is larger than a preset color difference.

5. The color correction method according to claim 1, 3 or 4, wherein the step of adjusting the color temperature of the first white field picture to a target color temperature for white balance correction comprises:

acquiring the brightness of the first white field picture;

and when the brightness is larger than the preset brightness, adjusting the color temperature of the first white field picture to a target color temperature for white balance correction.

6. The method according to claim 5, wherein after the step of obtaining the brightness of the first white field picture, further comprising:

and outputting prompt information of failure of color correction when the brightness is smaller than or equal to the preset brightness.

7. A color register correction device, comprising:

the receiving module is used for receiving a 3D display lookup table corresponding to the first preset color temperature and carrying out color quasi correction on a display picture of the display equipment according to the 3D display lookup table;

the processing module is used for processing the corrected display picture to obtain a first white field picture;

the correction module is used for adjusting the color temperature of the first white field picture to a target color temperature to carry out white balance correction, wherein the target color temperature comprises a second preset color temperature and a third preset color temperature.

8. A color correction apparatus, comprising: a display screen, a memory and a processor;

the display screen is used for displaying pictures;

the memory stores computer-executable instructions;

the processor executes computer-executable instructions stored in the memory, causing the color level correction device to perform the color level correction method of any one of claims 1 to 6.

9. A computer readable storage medium having stored therein computer executable instructions which when executed by a processor are adapted to implement the color correction method of any of claims 1 to 6.

10. An electronic device having stored therein computer-executable instructions which, when executed by a processor, are adapted to carry out the color level correction method according to any one of claims 1 to 6.

Images