Display equipment calibration method and device, equipment and storage medium

Abstract

The invention relates to a display equipment calibration method and device, equipment and a storage medium. The method comprises the following steps: displaying at least one color of a to-be-adjusted color coordinate based on to-be-calibrated display equipment; and obtaining a currently input color coordinate adjustment value of the at least one color, and inputting the color coordinate adjustment value based on a consistency adjustment result of the first display effect and the second display effect, the first display effect and the second display effect are the effect that the display device to be calibrated and the target display device display the at least one color respectively; and performing metamerism calibration on the display device to be calibrated based on the chromaticity coordinate adjustment value. According to the invention, metamerism calibration can be carried out on the to-be-calibrated display equipment according to the subjective visual effect of an observer, so that metamerism phenomenon between the display equipment can be calibrated in a customized manner.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display device calibration method, apparatus, device and storage medium. Background Art

[0002] With the development of narrow-bandwidth display technology, various narrow-bandwidth color gamut display devices, such as LCD display devices, OLED display devices and laser projection devices, have gradually become mainstream display devices.

[0003] However, display devices in related technologies usually have the phenomenon of metamerism, which becomes increasingly prominent in practical applications and has a huge impact on the consistency of display effects between different display devices, and in particular cannot meet the needs of individual observers for consistency of display effects between different display devices. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the embodiments of the present disclosure provide a display device calibration method, apparatus, device and storage medium to solve the defects in the related art.

[0005] According to a first aspect of an embodiment of the present disclosure, a display device calibration method is provided, the method comprising:

[0006] At least one color whose color coordinates are to be adjusted is displayed based on the display device to be calibrated;

[0007] Acquire a color coordinate adjustment value of the at least one color currently input, the color coordinate adjustment value being input based on a consistency adjustment result of a first display effect and a second display effect, the first display effect and the second display effect being effects of the display device to be calibrated and the target display device displaying the at least one color, respectively;

[0008] Metamerism calibration is performed on the display device to be calibrated based on the color coordinate adjustment value.

[0009] In some embodiments, before performing the operation of displaying at least one color to be adjusted based on the color coordinates to be adjusted by the display device to be calibrated, the method further includes:

[0010] Performing color calibration on the display device to be calibrated.

[0011] In some embodiments, the color calibration of the display device to be calibrated includes:

[0012] Displaying a color gamut diagram based on the display device to be calibrated;

[0013] Collecting spectral data of a plurality of points in the color gamut diagram, the plurality of points including points located on three sides of at least one color gamut triangle in the color gamut diagram and a white point located inside the color gamut triangle;

[0014] The calibrated chromaticity values ​​of the plurality of points are obtained according to the spectral data and a preset color matching function.

[0015] In some embodiments, before performing the operation of displaying at least one color to be adjusted based on the color coordinates to be adjusted by the display device to be calibrated, the method further includes:

[0016] The value of the display parameter of the display device to be calibrated is adjusted to a target value, wherein the display parameter includes color temperature and / or screen brightness, and the target value includes the value of the display parameter of the target display device.

[0017] In some embodiments, the method further comprises:

[0018] In response to the display device to be calibrated satisfying a set condition, executing the operation of displaying at least one color whose color coordinates are to be adjusted based on the display device to be calibrated;

[0019] The display device to be calibrated meets the set conditions, including:

[0020] The time length for which the display device to be calibrated remains in the screen-on state after being powered on reaches a set time length threshold.

[0021] In some embodiments, performing metamerism calibration on the display device to be calibrated based on the color coordinate adjustment value includes:

[0022] Based on the color coordinate adjustment value, linear interpolation is performed in the initial multidimensional lookup table of the display device to be calibrated to obtain a target multidimensional lookup table;

[0023] Metamerism calibration is performed on the display device to be calibrated based on the target multi-dimensional lookup table.

[0024] In some embodiments, performing linear interpolation in an initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value to obtain a target multidimensional lookup table includes:

[0025] Inserting a set number of color coordinate adjustment values ​​of the target color between the color coordinate adjustment values ​​of every two adjacent colors in the initial multi-dimensional search;

[0026] The target multidimensional lookup table is determined based on the color coordinate adjustment value of the target color and the initial multidimensional lookup table.

[0027] In some embodiments, performing metamerism calibration on the display device to be calibrated based on the target multi-dimensional lookup table includes:

[0028] In response to acquiring the color image to be displayed of the display device to be calibrated, a target color value corresponding to the initial color value in the color image to be displayed is determined based on the target multi-dimensional lookup table for display by the display device to be calibrated.

[0029] According to a second aspect of an embodiment of the present disclosure, a display device calibration apparatus is provided, the apparatus comprising:

[0030] A color display module, used for displaying at least one color of the color coordinates to be adjusted based on the display device to be calibrated;

[0031] an adjustment value acquisition module, configured to acquire a color coordinate adjustment value of the at least one color currently input, wherein the color coordinate adjustment value is input based on a consistency adjustment result of a first display effect and a second display effect, wherein the first display effect and the second display effect are effects of the display device to be calibrated and the target display device displaying the at least one color, respectively;

[0032] A device calibration module is used to perform metamerism calibration on the display device to be calibrated based on the color coordinate adjustment value.

[0033] In some embodiments, the apparatus further comprises:

[0034] The color calibration module is used to perform color calibration on the display device to be calibrated.

[0035] In some embodiments, the color calibration module includes:

[0036] A color gamut diagram display unit, configured to display a color gamut diagram based on the display device to be calibrated;

[0037] A data acquisition unit, configured to acquire spectral data of a plurality of points in the color gamut diagram, wherein the plurality of points include points located on three sides of at least one color gamut triangle in the color gamut diagram and a white point located inside the color gamut triangle;

[0038] The chromaticity value acquisition unit is used to obtain the calibrated chromaticity values ​​of the multiple points according to the spectral data and a preset color matching function.

[0039] In some embodiments, the apparatus further comprises:

[0040] The display parameter adjustment module is used to adjust the value of the display parameter of the display device to be calibrated to a target value, wherein the display parameter includes color temperature and / or screen brightness, and the target value includes the value of the display parameter of the target display device.

[0041] In some embodiments, the color display module is further used to execute the operation of displaying at least one color to be adjusted based on the color coordinates to be adjusted by the display device to be calibrated in response to the display device to be calibrated satisfying a set condition;

[0042] The display device to be calibrated meets the set conditions, including:

[0043] The time length for which the display device to be calibrated remains in the screen-on state after being powered on reaches a set time length threshold.

[0044] In some embodiments, the device calibration module includes:

[0045] A lookup table acquisition unit, configured to perform linear interpolation in an initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value to obtain a target multidimensional lookup table;

[0046] A device calibration unit is used to perform metamerism calibration on the display device to be calibrated based on the target multi-dimensional lookup table.

[0047] In some embodiments, the lookup table acquisition unit is further used to:

[0048] Inserting a set number of color coordinate adjustment values ​​of the target color between the color coordinate adjustment values ​​of every two adjacent colors in the initial multi-dimensional search;

[0049] The target multidimensional lookup table is determined based on the color coordinate adjustment value of the target color and the initial multidimensional lookup table.

[0050] In some embodiments, the device calibration unit is further used to determine, in response to acquiring the color image to be displayed of the display device to be calibrated, target color values ​​corresponding to the initial color values ​​in the color image to be displayed based on the target multidimensional lookup table, for display by the display device to be calibrated.

[0051] According to a third aspect of an embodiment of the present disclosure, a display device is provided, the device comprising:

[0052] a processor and a memory for storing a computer program;

[0053] Wherein, the processor is configured to implement, when executing the computer program:

[0054] Displaying at least one color of the color coordinates to be adjusted based on the display device;

[0055] Acquire a color coordinate adjustment value of the at least one color currently input, the color coordinate adjustment value being input when the observer adjusts the first display effect of the display device to be consistent with the second display effect of the target display device based on his / her own feelings, the first display effect and the second display effect being effects of the display device and the target display device displaying the at least one color respectively;

[0056] The display device is subjected to metamerism calibration based on the color coordinate adjustment value.

[0057] According to a fourth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored, and when the program is executed by a processor of a display device, the following is implemented:

[0058] Displaying at least one color of the color coordinates to be adjusted based on the display device;

[0059] Acquire a color coordinate adjustment value of the at least one color currently input, the color coordinate adjustment value being input when the observer adjusts the first display effect of the display device to be consistent with the second display effect of the target display device based on his / her own feelings, the first display effect and the second display effect being effects of the display device and the target display device displaying the at least one color respectively;

[0060] The display device is subjected to metamerism calibration based on the color coordinate adjustment value.

[0061] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0062] The present disclosure displays at least one color of color coordinates to be adjusted based on a display device to be calibrated, and obtains a color coordinate adjustment value of the at least one color currently input, wherein the color coordinate adjustment value is input based on a consistency adjustment result of a first display effect and a second display effect, wherein the first display effect and the second display effect are effects of the display device to be calibrated and a target display device displaying the at least one color, respectively, and then performs metamerism calibration on the display device to be calibrated based on the color coordinate adjustment value, so that metamerism calibration can be performed on the display device to be calibrated according to the subjective visual effect of an observer, thereby achieving customized calibration of metamerism between display devices.

[0063] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] 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.

[0065] Figure 1 is a flow chart of a display device calibration method according to an exemplary embodiment of the present disclosure;

[0066] Figure 2A is a flowchart showing how to perform color calibration on the display device to be calibrated according to an exemplary embodiment of the present disclosure;

[0067] Figure 2B is a schematic diagram showing a color gamut diagram display effect according to an exemplary embodiment of the present disclosure;

[0068] Figure 3 is a flowchart showing how to perform metamerism calibration on the display device to be calibrated based on the color coordinate adjustment value according to an exemplary embodiment of the present disclosure;

[0069] Figure 4A is a flowchart showing how to perform linear interpolation in an initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value according to an exemplary embodiment of the present disclosure;

[0070] Figure 4B is a schematic diagram of a linear interpolation effect according to an exemplary embodiment of the present disclosure;

[0071] Figure 5 is a block diagram of a display device calibration apparatus according to an exemplary embodiment of the present disclosure;

[0072] Figure 6 is a block diagram of another display device calibration apparatus according to an exemplary embodiment of the present disclosure;

[0073] Figure 7 is a block diagram of a display device according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0074] 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.

[0075] With the development of narrow-bandwidth display technology, a variety of narrow-bandwidth color gamut display devices, such as LCD display devices, OLED display devices, and laser projection devices, have gradually become mainstream display devices. Due to the large differences in the primary color spectra between different display devices, when displayed on different display devices, the subjective visual effects of colors with the same chromaticity value may not match, while the chromaticity values ​​of colors with subjective visual matching may be different; or it may lead to a phenomenon that one observer thinks that the color display between different display devices is consistent, while another observer thinks it is inconsistent.

[0076] However, the above phenomenon is called metamerism, which has gradually become prominent in practical applications and has a huge impact on many application fields that focus on color display. Therefore, how to calibrate the metamerism between display devices according to the needs of individual observers and achieve customized display consistency for individual observers between different display devices is one of the technical problems that need to be solved urgently.

[0077] In view of this, the present disclosure provides the following display device calibration method, apparatus, device and storage medium to solve the above-mentioned technical problems in the related art.

[0078] Figure 1 is a flow chart of a display device calibration method according to an exemplary embodiment; the method of this embodiment can be executed by a display device calibration device, and the display device calibration device can be configured in a display device to be calibrated, such as a smart TV, a tablet computer, a display screen, a monitor, etc. Specifically, Figure 1 As shown, the method includes the following steps S101-S103:

[0079] In step S101 , at least one color whose color coordinates are to be adjusted is displayed based on the display device to be calibrated.

[0080] In this embodiment, when the display device calibration method of this embodiment is implemented on a display device to be calibrated, at least one color whose color coordinates are to be adjusted may be displayed based on the display device to be calibrated.

[0081] For example, the display device to be calibrated may display a preset operation interface, which may include at least one color whose color coordinates are to be adjusted, and virtual keys for adjusting the color coordinates of each color, such as up, down, left, right, etc. Exemplarily, an observer (e.g., a user of the display device to be calibrated, etc.) may adjust the color coordinates (e.g., u' and v') of the color based on the virtual keys, and the value of each adjustment step is, for example, 0.001.

[0082] It is worth noting that the at least one color mentioned above can be set based on the needs of the actual scene, for example, it can be set to at least one of white, red, green, blue, cyan, purple, yellow, grass green, sky blue, skin color, etc. This embodiment does not limit this.

[0083] The specific RGB values ​​of the above colors can be shown in Table 1 below:

[0084] Table 1

[0085]

[0086]

[0087] In step S102, the color coordinate adjustment value of the at least one color currently input is obtained.

[0088] In this embodiment, after the display device to be calibrated displays at least one color whose color coordinates are to be adjusted, the display device to be calibrated may acquire the color coordinate adjustment value of the at least one color currently input by the observer.

[0089] The color coordinate adjustment value is input based on the consistency adjustment result of the first display effect and the second display effect, and the first display effect and the second display effect are the effects of the display device to be calibrated and the target display device displaying the at least one color, respectively. For example, the observer can adjust the first display effect to be consistent with the second display effect based on his or her own feelings to obtain the consistency adjustment result, thereby inputting the color coordinate adjustment value.

[0090] In other words, when the display device to be calibrated displays at least one color of the color coordinates to be adjusted, the observer can, based on his or her own subjective feelings, adjust the first display effect of each color displayed on the display device to be calibrated to the second display effect of the same color displayed on the target display device, that is, by adjusting the color coordinates of various colors on the display device to be calibrated, so that the display effect of the display device to be calibrated and the target display device displaying the same color is consistent, so that the color coordinate adjustment value of each color input by the observer on the display device to be calibrated can be obtained. Due to physiological differences in cone cells, macular shape, age, etc. of different observers, different observers have different subjective feelings about the consistency of display of the display device. The color coordinate adjustment value in this embodiment is input by the observer based on his or her own feelings, so this problem can be solved, that is, the metamerism phenomenon of the observer can be solved, and the metamerism phenomenon between display devices can be customized.

[0091] It is worth noting that the above-mentioned display device to be calibrated and the target display device can be display devices of different materials produced by the same manufacturer (for example, one is a liquid crystal display LCD device, and the other is an organic light emitting diode OLED device, etc.), or can be display devices of the same material produced by different manufacturers (for example, both are LCD devices, or both are OLED devices, etc.), and this embodiment does not limit this.

[0092] In step S103, metamerism calibration is performed on the display device to be calibrated based on the color coordinate adjustment value.

[0093] In this embodiment, after the color coordinate adjustment value of the at least one color currently input is obtained, metamerism calibration may be performed on the display device to be calibrated based on the color coordinate adjustment value.

[0094] In some embodiments, after obtaining the color coordinate adjustment value of at least one of the above-mentioned colors, the color lookup table (LookupTable, detection LUT) of the display device to be calibrated can be reformulated based on the color coordinate adjustment value, and then when the display device to be calibrated displays a color image subsequently, the target display image can be determined based on the reformulated LUT and displayed, thereby realizing metameric calibration of the display device to be calibrated.

[0095] The above-mentioned method of performing metamerism calibration on the display device to be calibrated based on the color coordinate adjustment value can also be referred to as follows Figure 3 The illustrated embodiment will not be described in detail here.

[0096] In other embodiments, before performing the operation described in step S101 based on the display device to be calibrated displaying at least one color to be adjusted, the display device to be calibrated may also be color calibrated to ensure that the display device to be calibrated can display colors normally. For specific color calibration methods, please refer to the records in the relevant technology, which is not limited in this embodiment. Figure 2A The illustrated embodiment will not be described in detail here.

[0097] In other embodiments, before performing the operation of displaying at least one color of the color coordinates to be adjusted based on the display device to be calibrated as described in step S101 above, the value of the display parameter of the display device to be calibrated may be adjusted to a target value, wherein the display parameter includes the color temperature and / or the screen brightness, and the target value includes the value of the display parameter of the target display device. Assuming that the color temperature of the target device (e.g., an OLED device) is 6500K and the screen brightness is 110nit, before performing the formal calibration, the color temperature of the display device to be calibrated may be adjusted to 6500K and the screen brightness may be adjusted to 110nit, even if the display parameters of the display device to be calibrated and the target display device are the same, the subsequent calibration steps are implemented on this basis.

[0098] In other embodiments, when it is detected that the display device to be calibrated meets the set conditions, the operation described in the above step S101 based on the display device to be calibrated displaying at least one color of the color coordinates to be adjusted is performed. Among them, the above-mentioned set conditions can be set based on the actual scene needs, and this embodiment is not limited to this. Exemplarily, the above-mentioned display device to be calibrated meets the set conditions, which may include: the display device to be calibrated remains in a non-off state after being turned on, and the length of time reaches a set time threshold (such as 30 minutes), etc., so that it can be ensured that the display device to be calibrated reaches a stable display state before performing subsequent calibration steps, thereby improving the accuracy of device calibration.

[0099] As can be seen from the above description, the method of this embodiment displays at least one color of the color coordinates to be adjusted based on the display device to be calibrated, and obtains the color coordinate adjustment value of the at least one color currently input, the color coordinate adjustment value is input based on the consistency adjustment result of the first display effect and the second display effect, the first display effect and the second display effect are the effects of the display device to be calibrated and the target display device displaying the at least one color respectively, and then performs metamerism calibration on the display device to be calibrated based on the color coordinate adjustment value. Since the color coordinate adjustment value is input when the observer adjusts the first display effect of the display device to be calibrated to be consistent with the second display effect of the target display device based on his own feelings, it is possible to perform metamerism calibration on the display device to be calibrated according to the subjective visual effect of the observer, thereby achieving customized calibration of metamerism between display devices.

[0100] Figure 2A It is a flowchart showing how to perform color calibration on the display device to be calibrated according to an exemplary embodiment of the present disclosure; based on the above embodiment, this embodiment takes how to perform color calibration on the display device to be calibrated as an example to exemplify.

[0101] like Figure 2A As shown above Figure 1 The color calibration of the display device to be calibrated in the illustrated embodiment may include the following steps S201-S203:

[0102] In step S201, a color gamut diagram is displayed based on the display device to be calibrated.

[0103] For example, Figure 2B FIG. 1 is a schematic diagram of a color gamut diagram display effect according to an exemplary embodiment of the present disclosure. In this embodiment, when color calibration (i.e., white point calibration) is performed on the display device to be calibrated, the display device to be calibrated may be displayed as follows: Figure 2B The color gamut diagram shown.

[0104] It is worth noting that the type of the above color gamut diagram can be selected based on the needs of the actual application scenario, and this embodiment does not limit this.

[0105] Exemplarily, the color gamut diagram used in this embodiment may be a CIE 1976 Uniform Chromaticity Diagram.

[0106] In step S202, spectral data of a plurality of points are collected in the color gamut diagram.

[0107] In this embodiment, after the color gamut diagram is displayed based on the display device to be calibrated, spectral data of multiple points in the color gamut diagram may be collected.

[0108] The above-mentioned multiple points may include points located on three sides of at least one color gamut triangle in the color gamut diagram and a white point located inside the color gamut triangle.

[0109] like Figure 2B As shown, the above-mentioned multiple points include 20 points located on the three sides of the color gamut triangle 201 and the color gamut triangle 202, and the white point WhitePoint located inside the color gamut triangle 201 (or the color gamut triangle 202), that is, a total of 21 colors. On this basis, the spectrum data of the above-mentioned multiple points can be collected by a spectrum measuring instrument. It can be understood that the above-mentioned 21 colors can include 20 colors of different hues, high saturation (such as 100% saturation) and low saturation (such as 50% saturation) and white point neutral colors.

[0110] It is worth noting that the above-mentioned spectrum measuring instrument can be selected based on actual needs, such as selecting a PR650 spectrum radiometer, etc., and this embodiment does not limit this.

[0111] In step S203, the calibrated chromaticity values ​​of the plurality of points are obtained according to the spectral data and a preset color matching function.

[0112] In this embodiment, after collecting spectral data of multiple points in the color gamut diagram, the calibrated chromaticity values ​​of the multiple points can be obtained based on the spectral data and a preset color matching function. For example, the spectral data is substituted into the above-mentioned color matching function to use the output of the function as the calibrated chromaticity values ​​of the above-mentioned multiple points.

[0113] It is worth noting that the color matching function can be set based on the requirements of actual application scenarios, such as being set to the CIE2015 color matching function (Color Matching Function, CMF for short), etc., which is not limited in this embodiment.

[0114] For example, assuming that the spectral data of a certain point among the above multiple points is SPD, and the selected color matching function is CMF, the tristimulus value XYZ of the point can be determined based on the following formula (2-1) and used as the calibrated chromaticity value of the point:

[0115] XYZ=CMF*SPD; (2-1)

[0116] From the above description, it can be seen that this embodiment can realize color calibration of the display device to be calibrated by displaying a color gamut diagram based on the display device to be calibrated, collecting spectral data of multiple points in the color gamut diagram, and then obtaining the calibrated chromaticity values ​​of the multiple points according to the spectral data and a preset color matching function, thereby ensuring that the display device to be calibrated can display colors correctly. On this basis, the accuracy of subsequent calibration of the display device to be calibrated can be ensured.

[0117] Figure 3 The present invention is a flowchart showing how to perform metamerism calibration on the display device to be calibrated based on the color coordinate adjustment value according to an exemplary embodiment of the present disclosure; based on the above embodiment, this embodiment takes how to perform metamerism calibration on the display device to be calibrated based on the color coordinate adjustment value as an example to exemplify.

[0118] like Figure 3 As shown, the metamerism calibration of the display device to be calibrated based on the color coordinate adjustment value described in the above step S103 may include the following steps S301-S302:

[0119] In step S301, based on the color coordinate adjustment value, linear interpolation is performed in the initial multidimensional lookup table of the display device to be calibrated to obtain a target multidimensional lookup table.

[0120] In this embodiment, after the color coordinate adjustment value of the at least one color currently input is obtained, linear interpolation may be performed in the initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value to obtain a target multidimensional lookup table.

[0121] Exemplarily, the initial multi-dimensional lookup table may be a 17*17*17 three-dimensional lookup table (3DLUT).

[0122] In some embodiments, linear interpolation compensation can be performed in the 3D LUT according to the color coordinate adjustment value input by the observer to calibrate the observer metamerism between the display device to be calibrated and the target display device. The specific linear interpolation method can refer to the interpolation method in the related art, and this embodiment does not limit this.

[0123] In some other embodiments, the above-mentioned method of performing linear interpolation in the initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value can also refer to the following Figure 4A The illustrated embodiment will not be described in detail here.

[0124] In step S302, metamerism calibration is performed on the display device to be calibrated based on the target multi-dimensional lookup table.

[0125] In this embodiment, after linear interpolation is performed in the initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value to obtain a target multidimensional lookup table, metamerism calibration can be performed on the display device to be calibrated based on the target multidimensional lookup table.

[0126] For example, the display device to be calibrated can, in response to obtaining the color image to be displayed of the display device to be calibrated, determine the target color value corresponding to the initial color value in the color image to be displayed based on the above-mentioned target multi-dimensional lookup table, so that the display device to be calibrated can be displayed, thereby realizing metamerism calibration of the display device to be calibrated.

[0127] That is, when the display device to be calibrated needs to display a color image to be displayed, the initial color value in the color image to be displayed can be mapped to the target color value through the target multidimensional lookup table, so as to display the color image to be displayed based on the target color value. Since the target multidimensional lookup table is determined based on the color coordinate adjustment value input by the observer based on his / her own perception, the target color value of the image to be displayed is determined based on the target multidimensional lookup table, so that the display device to be calibrated can be calibrated for metamerism according to the subjective visual effect of the observer, thereby realizing customized calibration of metamerism between display devices.

[0128] As can be seen from the above description, in this embodiment, by performing linear interpolation in the initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value to obtain a target multidimensional lookup table, and performing metamerism calibration on the display device to be calibrated based on the target multidimensional lookup table, metamerism calibration can be performed on the display device to be calibrated based on the color coordinate adjustment value. Since the color coordinate adjustment value is input when the observer adjusts the first display effect of the display device to be calibrated to be consistent with the second display effect of the target display device based on his own feelings, metamerism calibration can be performed on the display device to be calibrated based on the subjective visual effect of the observer, thereby achieving customized calibration of metamerism between display devices.

[0129] Figure 4AIt is a flowchart showing how to perform linear interpolation in the initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value according to an exemplary embodiment of the present disclosure; based on the above embodiment, this embodiment uses an example of how to perform linear interpolation in the initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value as an example to exemplify.

[0130] like Figure 4A As shown, the linear interpolation in the initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value described in the above step S301 may include the following steps S401-S402:

[0131] In step S401, a set number of color coordinate adjustment values ​​of the target color are inserted between the color coordinate adjustment values ​​of every two adjacent colors in the initial multi-dimensional search.

[0132] In this embodiment, after the color coordinate adjustment value of the at least one color currently input is obtained, a set number of color coordinate adjustment values ​​of the target color may be inserted between the color coordinate adjustment values ​​of every two adjacent colors in the initial multi-dimensional search.

[0133] It is worth noting that the above-mentioned set number can be set based on actual scene needs, such as being set to 3 or 5, etc., and this embodiment does not limit this.

[0134] For example, Figure 4B is a schematic diagram of a linear interpolation effect according to an exemplary embodiment of the present disclosure; Figure 4B As shown in the figure, taking two adjacent colors R1(x1,y1) and R2(x2,y2) as examples, assuming that the color coordinates of the colors adjusted by the observer are R1'(x1+0.004,y1+0.002) and R2'(x2-0.001,y2+0.001), and the three colors uniformly inserted in R1 and R2 (named as target colors for easy distinction) are R 10 (x 10 ,y 10 ), R 11 (x 11 ,y 11 ) and R 12 (x 12 ,y 12 ), then the color coordinate adjustment values ​​R of the three colors 10 '、R 11 ' and R 12 ' can be shown as follows (4-1) to (4-3):

[0135] R 10 '(x 10+3 / 4*0.004-1 / 4*0.001,y 10 +3 / 4*0.002+1 / 4*0.001);(4-1)

[0136] R 11 '(x 11 +(0.004-0.001) / 2,y 11 +(0.002+0.001) / 2));(4-2)

[0137] R 12 '(x 12 +1 / 4*0.004-3 / 4*0.001,y 12 +1 / 4*0.002+3 / 4*0.001);(4-3)

[0138] In step S402, the target multidimensional lookup table is determined based on the color coordinate adjustment value of the target color and the initial multidimensional lookup table.

[0139] In this embodiment, after a set number of color coordinate adjustment values ​​of the target color are inserted between the color coordinate adjustment values ​​of every two adjacent colors in the initial multidimensional lookup, the target multidimensional lookup table can be determined based on the color coordinate adjustment values ​​of the target color and the initial multidimensional lookup table. For example, the color coordinates of the target color can be added to the initial multidimensional lookup table after the color coordinates are adjusted to obtain the target multidimensional lookup table.

[0140] As can be seen from the above description, this embodiment inserts a set number of color coordinate adjustment values ​​of the target color between the color coordinate adjustment values ​​of every two adjacent colors in the initial multidimensional lookup, and determines the target multidimensional lookup table based on the color coordinate adjustment values ​​of the target color and the initial multidimensional lookup table. This can achieve linear interpolation in the initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment values, and further achieve subsequent metameric calibration of the display device to be calibrated based on the target multidimensional lookup table.

[0141] Figure 5 is a block diagram of a display device calibration apparatus according to an exemplary embodiment of the present disclosure; the apparatus of this embodiment can be configured in a display device to be calibrated, such as a smart TV, a tablet computer, a display screen, a monitor, etc. Specifically, as Figure 5 As shown, the apparatus may include: a color display module 110, an adjustment value acquisition module 120 and a device calibration module 130, wherein:

[0142] A color display module 110, configured to display at least one color of color coordinates to be adjusted based on the display device to be calibrated;

[0143] An adjustment value acquisition module 120, configured to acquire a color coordinate adjustment value of the at least one color currently input, wherein the color coordinate adjustment value is input based on a consistency adjustment result of a first display effect and a second display effect, wherein the first display effect and the second display effect are effects of the display device to be calibrated and the target display device displaying the at least one color, respectively;

[0144] The device calibration module 130 is configured to perform metamerism calibration on the display device to be calibrated based on the color coordinate adjustment value.

[0145] As can be seen from the above description, the apparatus of this embodiment displays at least one color of the color coordinates to be adjusted based on the display device to be calibrated, and obtains the color coordinate adjustment value of the at least one color currently input, the color coordinate adjustment value is input based on the consistency adjustment result of the first display effect and the second display effect, the first display effect and the second display effect are the effects of the display device to be calibrated and the target display device displaying the at least one color respectively, and then performs metamerism calibration on the display device to be calibrated based on the color coordinate adjustment value. Since the color coordinate adjustment value is input when the observer adjusts the first display effect of the display device to be calibrated to be consistent with the second display effect of the target display device based on his own feelings, it is possible to perform metamerism calibration on the display device to be calibrated according to the subjective visual effect of the observer, thereby achieving customized calibration of metamerism between display devices.

[0146] Figure 6 2 is a block diagram of another display device calibration device according to an exemplary embodiment of the present disclosure; the device of this embodiment can be configured in a display device to be calibrated, such as a smart TV, a tablet computer, a display screen, a monitor, etc. Among them, the color display module 210, the adjustment value acquisition module 220 and the device calibration module 230 are the same as the aforementioned Figure 5 The functions of the color display module 110 , the adjustment value acquisition module 120 and the device calibration module 130 in the illustrated embodiment are the same and will not be described in detail herein.

[0147] like Figure 6 As shown, the above device may also include:

[0148] The color calibration module 240 is used to perform color calibration on the display device to be calibrated.

[0149] In some embodiments, the color calibration module 240 may include:

[0150] A color gamut diagram display unit 241, configured to display a color gamut diagram based on the display device to be calibrated;

[0151] A data collection unit 242 is used to collect spectral data of a plurality of points in the color gamut diagram, wherein the plurality of points include points located on three sides of at least one color gamut triangle in the color gamut diagram and a white point located inside the color gamut triangle;

[0152] The chromaticity value acquisition unit 243 is used to obtain the calibrated chromaticity values ​​of the multiple points according to the spectral data and a preset color matching function.

[0153] In some embodiments, the above apparatus may further include:

[0154] The display parameter adjustment module 250 is used to adjust the value of the display parameter of the display device to be calibrated to a target value, wherein the display parameter includes color temperature and / or screen brightness, and the target value includes the value of the display parameter of the target display device.

[0155] In some embodiments, the color display module 210 may also be used to execute the operation of displaying at least one color to be adjusted based on the color coordinates to be adjusted by the display device to be calibrated in response to the display device to be calibrated satisfying a set condition;

[0156] The display device to be calibrated satisfies the set conditions, which may include:

[0157] The time length for which the display device to be calibrated remains in the screen-on state after being powered on reaches a set time length threshold.

[0158] In some embodiments, the device calibration module 230 may include:

[0159] A lookup table acquisition unit 231 is used to perform linear interpolation in an initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value to obtain a target multidimensional lookup table;

[0160] The device calibration unit 232 is configured to perform metamerism calibration on the display device to be calibrated based on the target multi-dimensional lookup table.

[0161] In some embodiments, the above-mentioned lookup table acquisition unit 231 may also be used to:

[0162] Inserting a set number of color coordinate adjustment values ​​of the target color between the color coordinate adjustment values ​​of every two adjacent colors in the initial multi-dimensional search;

[0163] The target multidimensional lookup table is determined based on the color coordinate adjustment value of the target color and the initial multidimensional lookup table.

[0164] In some embodiments, the above-mentioned device calibration unit 232 can also be used to determine, in response to obtaining the color image to be displayed of the display device to be calibrated, the target color value corresponding to the initial color value in the color image to be displayed based on the target multi-dimensional lookup table, for display by the display device to be calibrated.

[0165] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0166] Figure 7 900 is a block diagram of a display device according to an exemplary embodiment. For example, the device 900 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0167] Reference Figure 7 , device 900 may include one or more of the following components: a processing component 902 , a memory 904 , a power component 906 , a multimedia component 908 , an audio component 910 , an input / output (I / O) interface 912 , a sensor component 914 , and a communication component 916 .

[0168] The processing component 902 generally controls the overall operation of the device 900, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 902 may include one or more processors 920 to execute instructions to complete all or part of the steps of the display device calibration method described above. In addition, the processing component 902 may include one or more modules to facilitate the interaction between the processing component 902 and other components. For example, the processing component 902 may include a multimedia module to facilitate the interaction between the multimedia component 908 and the processing component 902.

[0169] The memory 904 is configured to store various types of data to support operations on the device 900. Examples of such data include instructions for any application or method operating on the device 900, contact data, phone book data, messages, pictures, videos, etc. The memory 904 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0170] The power supply component 906 provides power to the various components of the device 900. The power supply component 906 can include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 900.

[0171] The multimedia component 908 includes a screen that provides an output interface between the device 900 and the user. In some embodiments, the screen may include a liquid crystal display panel and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 908 includes a front camera and / or a rear camera. When the device 900 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0172] The audio component 910 is configured to output and / or input audio signals. For example, the audio component 910 includes a microphone (MIC), and when the device 900 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 904 or sent via the communication component 916. In some embodiments, the audio component 910 also includes a speaker for outputting audio signals.

[0173] I / O interface 912 provides an interface between processing component 902 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0174] The sensor assembly 914 includes one or more sensors for providing various aspects of status assessment for the device 900. For example, the sensor assembly 914 can detect the open / closed state of the device 900, the relative positioning of components, such as the display panel and keypad of the device 900, and the sensor assembly 914 can also detect the position change of the device 900 or a component of the device 900, the presence or absence of user contact with the device 900, the orientation or acceleration / deceleration of the device 900, and the temperature change of the device 900. The sensor assembly 914 can also include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 914 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 914 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0175] The communication component 916 is configured to facilitate wired or wireless communication between the device 900 and other devices. The device 900 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, 4G or 5G or a combination thereof. In an exemplary embodiment, the communication component 916 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 916 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0176] In an exemplary embodiment, the device 900 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described display device calibration method.

[0177] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 904 including instructions, and the instructions can be executed by the processor 920 of the device 900 to complete the above display device calibration method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0178] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0179] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A display device calibration method, characterized in that: The method comprises: At least one color whose color coordinates are to be adjusted is displayed based on the display device to be calibrated; Acquire a color coordinate adjustment value of the at least one color currently input, the color coordinate adjustment value being input based on a consistency adjustment result of a first display effect and a second display effect, the first display effect and the second display effect being effects of the display device to be calibrated and the target display device displaying the at least one color, respectively; Metamerism calibration is performed on the display device to be calibrated based on the color coordinate adjustment value.

2. The method according to claim 1, characterized in that Before executing the operation of displaying at least one color to be adjusted based on the color coordinates to be adjusted by the display device to be calibrated, the method further includes: Performing color calibration on the display device to be calibrated.

3. The method according to claim 2, characterized in that The color calibration of the display device to be calibrated includes: Displaying a color gamut diagram based on the display device to be calibrated; Collecting spectral data of a plurality of points in the color gamut diagram, the plurality of points including points located on three sides of at least one color gamut triangle in the color gamut diagram and a white point located inside the color gamut triangle; The calibrated chromaticity values ​​of the plurality of points are obtained according to the spectral data and a preset color matching function.

4. The method according to claim 1, characterized in that Before executing the operation of displaying at least one color to be adjusted based on the color coordinates to be adjusted by the display device to be calibrated, the method further includes: The value of the display parameter of the display device to be calibrated is adjusted to a target value, wherein the display parameter includes color temperature and / or screen brightness, and the target value includes the value of the display parameter of the target display device.

5. The method according to claim 1, characterized in that The method further comprises: In response to the display device to be calibrated satisfying a set condition, executing the operation of displaying at least one color whose color coordinates are to be adjusted based on the display device to be calibrated; The display device to be calibrated meets the set conditions, including: The time length for which the display device to be calibrated remains in the screen-on state after being powered on reaches a set time length threshold.

6. The method according to claim 1, characterized in that The performing metamerism calibration on the display device to be calibrated based on the color coordinate adjustment value includes: Based on the color coordinate adjustment value, linear interpolation is performed in the initial multidimensional lookup table of the display device to be calibrated to obtain a target multidimensional lookup table; Metamerism calibration is performed on the display device to be calibrated based on the target multi-dimensional lookup table.

7. The method according to claim 6, characterized in that The step of performing linear interpolation in the initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value to obtain a target multidimensional lookup table comprises: Inserting a set number of color coordinate adjustment values ​​of the target color between the color coordinate adjustment values ​​of every two adjacent colors in the initial multi-dimensional search; The target multidimensional lookup table is determined based on the color coordinate adjustment value of the target color and the initial multidimensional lookup table.

8. The method according to claim 6, characterized in that The performing metamerism calibration on the display device to be calibrated based on the target multi-dimensional lookup table includes: In response to acquiring the color image to be displayed of the display device to be calibrated, a target color value corresponding to the initial color value in the color image to be displayed is determined based on the target multi-dimensional lookup table for display by the display device to be calibrated.

9. A display device calibration device, characterized in that: The device comprises: A color display module, used for displaying at least one color of the color coordinates to be adjusted based on the display device to be calibrated; an adjustment value acquisition module, configured to acquire a color coordinate adjustment value of the at least one color currently input, wherein the color coordinate adjustment value is input based on a consistency adjustment result of a first display effect and a second display effect, wherein the first display effect and the second display effect are effects of the display device to be calibrated and the target display device displaying the at least one color, respectively; A device calibration module is used to perform metamerism calibration on the display device to be calibrated based on the color coordinate adjustment value.

10. The device according to claim 9, characterized in that The device also includes: The color calibration module is used to perform color calibration on the display device to be calibrated.

11. The device according to claim 10, characterized in that The color calibration module comprises: A color gamut diagram display unit, configured to display a color gamut diagram based on the display device to be calibrated; A data acquisition unit, configured to acquire spectral data of a plurality of points in the color gamut diagram, wherein the plurality of points include points located on three sides of at least one color gamut triangle in the color gamut diagram and a white point located inside the color gamut triangle; The chromaticity value acquisition unit is used to obtain the calibrated chromaticity values ​​of the multiple points according to the spectral data and a preset color matching function.

12. The device according to claim 9, characterized in that The device also includes: The display parameter adjustment module is used to adjust the value of the display parameter of the display device to be calibrated to a target value, wherein the display parameter includes color temperature and / or screen brightness, and the target value includes the value of the display parameter of the target display device.

13. The device according to claim 9, characterized in that The color display module is further used for executing the operation of displaying at least one color to be adjusted based on the color coordinates to be adjusted by the display device to be calibrated in response to the display device to be calibrated satisfying a set condition; The display device to be calibrated meets the set conditions, including: The time length for which the display device to be calibrated remains in the screen-on state after being powered on reaches a set time length threshold.

14. The device according to claim 9, characterized in that The device calibration module comprises: A lookup table acquisition unit, configured to perform linear interpolation in an initial multidimensional lookup table of the display device to be calibrated based on the color coordinate adjustment value to obtain a target multidimensional lookup table; A device calibration unit is used to perform metamerism calibration on the display device to be calibrated based on the target multi-dimensional lookup table.

15. The device according to claim 14, characterized in that The lookup table acquisition unit is also used for: Inserting a set number of color coordinate adjustment values ​​of the target color between the color coordinate adjustment values ​​of every two adjacent colors in the initial multi-dimensional search; The target multidimensional lookup table is determined based on the color coordinate adjustment value of the target color and the initial multidimensional lookup table.

16. The device according to claim 14, characterized in that The device calibration unit is further configured to, in response to acquiring the color image to be displayed of the display device to be calibrated, determine, based on the target multidimensional lookup table, a target color value corresponding to an initial color value in the color image to be displayed, for display by the display device to be calibrated.

17. A display device, characterized in that: The device comprises: a processor and a memory for storing a computer program; Wherein, the processor is configured to implement, when executing the computer program: Displaying at least one color of the color coordinates to be adjusted based on the display device; Acquire a color coordinate adjustment value of the at least one color currently input, the color coordinate adjustment value being input when the observer adjusts the first display effect of the display device to be consistent with the second display effect of the target display device based on his / her own feelings, the first display effect and the second display effect being effects of the display device and the target display device displaying the at least one color respectively; The display device is subjected to metamerism calibration based on the color coordinate adjustment value.

18. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by the processor of the display device, the following is achieved: Displaying at least one color of the color coordinates to be adjusted based on the display device; Acquire a color coordinate adjustment value of the at least one color currently input, the color coordinate adjustment value being input when the observer adjusts the first display effect of the display device to be consistent with the second display effect of the target display device based on his / her own feelings, the first display effect and the second display effect being effects of the display device and the target display device displaying the at least one color respectively; The display device is subjected to metamerism calibration based on the color coordinate adjustment value.

Images