CN108628715B - Display effect correction method and device of display equipment - Google Patents
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- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
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- G06F11/2221—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested to test input/output devices or peripheral units
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Abstract
The embodiment of the invention discloses a display effect correction method and device of display equipment, relates to the technical field of display, and can realize system Gamma correction through a simple algorithm so as to improve the display effect of the display equipment. The method comprises the following steps: controlling the display equipment to enter a to-be-tested mode and displaying a default graphic card; acquiring display characteristic data at a preset gray scale acquired on display equipment; generating a display look-up table (LUT) according to display characteristic data at a preset gray scale, wherein the LUT comprises the mapping relation between the display characteristic data at all gray scales on the display equipment and the adjusted display characteristic data; loading the LUT on the display device so that the display device displays the detection graphic card according to the display characteristic data adjusted in the LUT; and detecting the detection graphic card, and if the detection graphic card does not accord with the test standard, acquiring display characteristic data at a preset gray scale on the detection graphic card to regenerate the LUT.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display effect correction method and device of display equipment.
Background
The linear variation in brightness appears non-uniform to the human eye, which is more sensitive to variations in dark fields and less sensitive to variations in highlights. That is, the human eye considers the middle gray not at a place where the luminance is 0.5(50 degrees gray) but at a place where the luminance is about 0.18(18 degrees gray). Therefore, if the photographing apparatus uses an 8-bit space to store a photograph, the input brightness is encoded with an encoding gamma of about 0.454, resulting in an image. This value of 0.45 is due entirely to the measurement of the characteristics of the human eye.
The encoding gamma describes an encoding transfer function (encoding transfer function) between scene luminance values (scene luminance values) and encoded pixel values (encoded pixel values) captured by an image device. Display gamma (display gamma) describes the encoding transfer function (encoding transfer function) between the encoded pixel value and the displayed brightness (displayed radius). And the product of encoding gamma and display gamma is the end-to-end gamma of a graphics system. If this product is 1, the displayed luminance is proportional to the captured luminance of the real scene. The visual perception determines about 0.454 gamma of the camera and about 2.2 gamma of the display.
Gamma Correction (Gamma Correction) is a method of editing a Gamma curve of an image to perform nonlinear tone editing on the image. Gamma is divided into a file Gamma, a system Gamma and a display Gamma; display Gamma is a physical property of the display that is uncorrectable; the Gamma is a fixed value according to the relevant standard specification file for a given digital photo file; system Gamma: is a change in the digital file of a photograph that the computer system has read before outputting to the display, is correctable. The system Gamma is one or more sets of LUTs (look-up-tables). The LUT is actually a mapping table of one or more pixel gray values, and changes the actually sampled pixel gray value into another corresponding gray value through certain transformation, such as threshold, inversion, binarization, contrast adjustment, linear transformation, etc., so as to highlight useful information of the image and enhance the optical contrast of the image. Many PC series cards have 8/10/12/16 or even 32 bit LUTs, and in particular what transformations are performed in the LUTs are defined by software. It actually functions as a color space conversion, converting the effect of one color into another color. Therefore, the correction of the system Gamma can greatly affect the display effect of the electronic product.
In the prior art, in order to achieve a better display effect, the pixel gray values of all gray scales need to be collected when the LUT is manufactured, so that a large amount of time is wasted, and the conversion process of the LUT is complex.
With the development of science and technology and the improvement of living standard of people, the requirement on the display effect of electronic products is higher and higher, and how to realize the Gamma correction of the system through a simple algorithm is more and more concerned.
Disclosure of Invention
Embodiments of the present invention provide a method and an apparatus for correcting a display effect of a display device, which can implement system Gamma correction through a simple algorithm to improve the display effect of the display device.
In a first aspect, a display effect correction method for a display device is provided, including: controlling the display equipment to enter a to-be-tested mode and displaying a default graphic card; acquiring display characteristic data at a preset gray scale acquired on display equipment; generating a display look-up table (LUT) according to display characteristic data at a preset gray scale, wherein the LUT comprises the mapping relation between the display characteristic data at all gray scales on the display equipment and the adjusted display characteristic data; loading the LUT on the display device so that the display device displays the detection graphic card according to the display characteristic data adjusted in the LUT; and detecting the detection graphic card, and if the detection graphic card does not accord with the test standard, acquiring display characteristic data at a preset gray scale on the detection graphic card to regenerate the LUT.
In the method, the display effect correction device of the display equipment can control the display equipment to enter a to-be-tested mode to display the default graphic card; acquiring display characteristic data at a preset gray scale acquired on display equipment; generating a display look-up table (LUT) according to display characteristic data at a preset gray scale; because the LUT contains the mapping relationship of the display characteristic data at all gray scales on the display device and the adjusted display characteristic data; thus, after the LUT is loaded on the display device, the display device can display the detection graphic card according to the display characteristic data adjusted in the LUT; and then, the display effect correction device of the display equipment redetects the detection graphic card, if the detection graphic card does not accord with the test standard, the display characteristic data of the preset gray scale position is collected on the detection graphic card to regenerate the LUT, and because the display characteristic data of all the gray scale positions of the default graphic card are not required to be collected in the process of generating the LUT, the Gamma correction of the system can be realized through a simple algorithm, and the display effect of the display equipment is improved.
In a second aspect, there is provided a display effect correction apparatus of a display device, including:
the processing module is used for controlling the display equipment to enter a to-be-tested mode and displaying a default graphic card;
the acquisition module is used for acquiring display characteristic data at a preset gray scale acquired on the display equipment;
the processing module is further configured to generate a display look-up table (LUT) according to the display characteristic data at the preset gray scale, where the LUT includes a mapping relationship between the display characteristic data at all gray scales on the display device and the adjusted display characteristic data;
the loading module is used for loading the LUT on the display equipment so that the display equipment can display the detection graphic card according to the display characteristic data adjusted in the LUT;
and the detection module is used for detecting the detection graphic card, and if the detection graphic card does not accord with the detection standard, the display characteristic data of the preset gray scale position is collected on the detection graphic card to regenerate the LUT.
In a third aspect, there is provided a display effect correction apparatus for a display device, comprising: communication interface, processor, memory, bus; the memory is used for storing computer execution instructions, the processor is connected with the memory through the bus, and when the terminal device runs, the processor executes the computer execution instructions stored in the memory, so that the display effect correction device of the display device executes the method.
In a fourth aspect, there is provided a computer storage medium comprising instructions which, when run on a computer, cause the computer to perform the method as described above.
It can be understood that, the display effect correction apparatus or the computer storage medium of any one of the display devices provided above is used for executing the method corresponding to the first aspect provided above, and therefore, the beneficial effects that can be achieved by the display effect correction apparatus or the computer storage medium refer to the beneficial effects of the method of the first aspect above and the corresponding schemes in the following detailed description, which are not repeated herein.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a diagram illustrating an application system architecture according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a display effect correction method of a display device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an interpolation method according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an over-algorithm interpolated Lv-R curve according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of adjusted display characteristic data according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a display effect according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display effect correction apparatus of a display device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display effect correction apparatus of a display device according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiments of the present invention may be applied to the following system architecture, with reference to fig. 1, including: the device comprises a display device 11 to be detected, a data acquisition device 12 and a display effect correction device 13 of the display device; the data acquisition device 12 comprises a detection probe 121 and a data processing device 122 connected with the detection probe 121, wherein the detection probe 121 is fixed on the aligning device 14, so that the detection probe 121 is tightly attached to the display surface of the display device 11, and the data acquisition device 12 can acquire display characteristic data at a preset gray scale by moving the detection probe 121 through the aligning device 14; the display effect correction device 13 provided in the embodiment of the present application may be an electronic computer, a PC, or the like, and the following description will be given by taking the PC as an example. The display effect correction device 13 is connected to the data acquisition device 12 and the display device 11 through a communication line, respectively, and the exemplary display effect correction device 13 is connected to the display device 11 through a serial line and connected to the data acquisition device 12 through a serial line or a USB line.
Based on the system architecture, an embodiment of the present application provides a method for correcting a display effect of a display device, which is shown in fig. 2 and includes the following steps:
101. the PC controls the display equipment to enter a to-be-tested mode and displays a default graphic card.
Wherein prior to step 101, the PC first detects a connection to a display device 11, such as a television to be tested, via a serial port line, the PC is in normal communication with the data acquisition device 12, and the detection probe 121 is docked with the display surface of the display device 11. Then step 101 is executed to control the display device to reach the mode to be detected.
102. The PC acquires display characteristic data at a preset gray scale acquired on the display device.
The alignment device 14 may be responsible for abutting the display surface of the detection probe 121 and the display device 11 to a specified position, and acquiring display characteristic data at a gray scale corresponding to the specified position, for example, the display characteristic data may be represented as XYZ tristimulus values at the gray scale, XYZ data, or the like. Taking 256 gray levels of 8 bits as an example, XYZ tristimulus values of R, G, B graphic cards at two sets of low gray levels, intermediate gray levels and high gray levels can be respectively collected.
103. And the PC generates a display look-up table LUT according to the display characteristic data at the preset gray scale, wherein the LUT comprises the mapping relation between the display characteristic data at all the gray scales on the display equipment and the adjusted display characteristic data.
The specific step 103 comprises: the PC interpolates the display characteristic data at the preset number of gray scales to obtain the display characteristic data at all the gray scales; calculating color coordinates to be detected according to the display characteristic data of each gray scale; when the color coordinate to be detected and the target color coordinate are determined to be smaller than the preset error value, determining adjusted display characteristic data according to the color coordinate to be detected; and generating the LUT according to the adjusted display characteristic data. The PC can use at least one interpolation algorithm to interpolate the display characteristic data at the preset number of gray scales to obtain the display characteristic data at all the gray scales, wherein the interpolation algorithm comprises a linear interpolation algorithm and a power exponent interpolation algorithm.
Examples are as follows:
when the value of x is calculated according to the following formula for the XYZ tristimulus value of the pure black card at the gray level of 0 and the XYZ value of any one of the R, G, B cards at the gray level of 25, interpolation is performed between the 0-50 th order according to the power exponent of x.
Wherein GY25 represents the Y stimulus value of the G card at the gray scale of 25, GY0 represents the Y stimulus value of the G card at the gray scale of 0, GY50 represents the Y stimulus value of the G card at the gray scale of 50, where the gray scale of 50 is taken as the inflection point, as shown in FIG. 3, the gray scale of 0-50 is interpolated by using the power exponent, the gray scale of 50-255 is interpolated linearly, and the gray scale of 50-255 can be interpolated linearly by a plurality of slopes, for example, according to the end points of the linear interpolation, the first slope is used between the gray scales of 50-75, the second slope is used between the gray scales of 75-125, the third slope is used between the gray scales of 125-150, the fourth slope is used between the gray scales of 150-225, etc., of course, more slope difference values can be used. It should be understood that the explanation here is only given by taking the interpolation of the Y value of the G card as an example, and the XYZ tristimulus values, XYZ data, and the like of other cards may be interpolated by the above-described method.
Other gray levels may be used as the inflection points of the power exponent interpolation and the linear interpolation, as long as the error rate of the data after the linear interpolation and the data of the display device is less than 20%. Data as shown in table 1, in which the first column is the number of gray scales, the second column shows the standard Lv-R (Lv value of R chart, unit nit (nit)), the third column shows the Lv value obtained by linear interpolation, the fourth column shows the error values of the second column and the third column, and the fourth column shows the error rate of the Lv value obtained by linear interpolation with the standard Lv-R. It can be seen that the 0-40 gray scale is suitable for power exponent interpolation, and the 40-255 gray scale is suitable for linear interpolation, but the method saves time, but the low-order data is poor in effectiveness, and the image quality is poor; certainly, power exponent interpolation can be selected from 0 to 255, but according to the above algorithm, it can be seen that only display characteristic data of two gray scale sampling points need to be acquired according to linear interpolation, and the power exponent interpolation needs display characteristic data of at least three gray scale sampling points, so that the sampling points for acquiring the display characteristic data are increased by adopting the power exponent interpolation from 0 to 255, the time of 2 to 3S is correspondingly increased for each increased sampling point, one gray scale in 40 to 255 can be used as an inflection point, and the point of quality and efficiency 50 is considered as an optimal point, as shown in fig. 4, a graph of actual data Lv-R of the display device and Lv-R interpolated by the algorithm is shown, wherein the abscissa is the gray scale number, and the ordinate is the value of Lv-R.
TABLE 1
In addition, after the display characteristic data at all the gray levels after interpolation is obtained, the display characteristic data of 256 gray levels can be made according to the above method, and then the linear interpolation is 1024 gray levels or 4096 gray levels, which is not described in detail. Therefore, the display characteristic data of all gray scales can be calculated in an interpolation mode, and the display characteristic data of all gray scales can be obtained by using less original data, so that the accuracy of the data is ensured, and the correction efficiency of the system Gamma is improved.
The process of obtaining the LUT according to the result of the above interpolation is exemplified as follows:
the G-gun data in RGB is determined by finding the corresponding gray scale value at each level in the raw data based on the calculated luminance value (where G-gun data in RGB represents luminance) according to the closest rule.
According to the formula Wx ═ RX + GX + BX)/(RX + RY + RZ + GX + GY + GZ + BX + BY + BZ)
And Wy is (RY + GY + BY)/(RX + RY + RZ + GX + GY + GZ + BX + BY + BZ) formula and G gun data to calculate color coordinates Wx and Wy, and when the calculated color coordinates Wx and Wy and the target color coordinate are smaller than a preset error value, R, B gun data are determined to be finally obtained. In the obtained R gun data, G gun data and B gun data, the condition that the R gun data and the B gun data can not be matched in a low gray scale can occur, and linear interpolation can be carried out in a 0-30 gray scale to obtain the R gun data and the B gun data of the 0-30 gray scale; under the condition that saturation occurs at a high order, linear interpolation can be performed at 240-255 to obtain data of R gun and B gun with 240-255 gray scale, the finally obtained data of R gun, G gun and B gun is shown in FIG. 5, and finally the obtained data of R gun, G gun and B gun, which is the most adjusted display characteristic data, and the display characteristic data after interpolation calculation are mapped to prepare an LUT, wherein a vertical axis (data of R gun, G gun and B gun) is represented by an Integer type value for representing a color value.
104. The PC loads the LUT on the display device so that the display device displays the test card based on the display characteristic data adjusted in the LUT.
105. And the PC detects the detection graphic card, and if the detection graphic card does not accord with the detection standard, the display characteristic data at the preset gray scale position is collected on the detection graphic card to regenerate the LUT.
After the LUT writing is completed, it is necessary to check whether the Gamma, the maximum brightness, the low order, and the high order satisfy the test criteria. As shown in a of fig. 6, a shows the display effect of the display device after adjusting the white balance, b of fig. 6 shows the display effect of the display device after manually adjusting the image quality, and c of fig. 6 shows the display effect of the display device after performing the system Gamma correction by using the scheme provided by the embodiment of the present invention. It can be seen that c of fig. 6 is best in the dark field case.
It should be noted that, the communication between the PC and the display device may be implemented by using a control command with a predetermined format, for example, the PC sends the control command conforming to the predetermined format to the display device, and the control command includes an LUT; the control command with the preset format is sent by adopting a serial port protocol, so that each operation can be accurately and effectively executed. The preset format comprises the following steps: a start code, a length, a command code, a data bit, a check bit, and an end code, wherein the LUT is included in the data bit.
Exemplary, as shown in the following table:
in addition, the PC receives a response message which is sent by the display device and responds to the control command, and the format of the response message comprises: start code, length, command code, data bits, check bits, and end code. Specific examples are as follows:
in the method, the display effect correction device of the display equipment can control the display equipment to enter a to-be-tested mode to display the default graphic card; acquiring display characteristic data at a preset gray scale acquired on display equipment; generating a display look-up table (LUT) according to display characteristic data at a preset gray scale; because the LUT contains the mapping relationship of the display characteristic data at all gray scales on the display device and the adjusted display characteristic data; thus, after the LUT is loaded on the display device, the display device can display the detection graphic card according to the display characteristic data adjusted in the LUT; and then, the display effect correction device of the display equipment redetects the detection graphic card, if the detection graphic card does not accord with the test standard, the display characteristic data of the preset gray scale position is collected on the detection graphic card to regenerate the LUT, and because the display characteristic data of all the gray scale positions of the default graphic card are not required to be collected in the process of generating the LUT, the Gamma correction of the system can be realized through a simple algorithm, and the display effect of the display equipment is improved.
An embodiment of the present invention provides a display effect correction apparatus for a display device, which is applied to implement the display effect correction method for the display device described above, and includes, with reference to fig. 7:
the processing module 71 is configured to control the display device to enter a to-be-tested mode, and display a default graphic card;
an obtaining module 72, configured to obtain display characteristic data at a preset gray scale acquired on the display device;
the processing module 71 is further configured to generate a display look-up table LUT according to the display characteristic data at the preset gray scale, where the LUT includes a mapping relationship between the display characteristic data at all gray scales on the display device and the adjusted display characteristic data;
a loading module 73, configured to load the LUT on a display device, so that the display device displays a detection card according to the display characteristic data adjusted in the LUT;
and the detection module 74 is configured to detect a detection graphic card, and if the detection graphic card does not meet the detection criterion, collect display characteristic data at a preset gray level on the detection graphic card to regenerate the LUT.
In an exemplary scheme, the processing module 71 is specifically configured to interpolate the display characteristic data at the preset number of gray scales to obtain display characteristic data at all gray scales; calculating color coordinates to be detected according to the display characteristic data of each gray scale; and when the color coordinate to be detected and the target color coordinate are determined to be smaller than the preset error, determining the adjusted display characteristic data according to the color coordinate to be detected, and generating the LUT according to the adjusted display characteristic data.
In an exemplary scheme, the processing module 71 is specifically configured to interpolate the display characteristic data at the preset number of gray scales by using at least one interpolation algorithm to obtain the display characteristic data at all gray scales, where the interpolation algorithm includes a linear interpolation algorithm and a power exponent interpolation algorithm.
In an exemplary scheme, the loading module 73 is specifically configured to send a control command conforming to a predetermined format to the display device, where the control command includes the display lookup table; the preset format comprises: a start code, a length, a command code, a data bit, a check bit, and an end code, wherein the display lookup table is included in the data bit.
In an exemplary scheme, the obtaining module 73 is further configured to receive a response message in response to the control command, where the format of the response message includes: start code, length, command code, data bits, check bits, and end code.
All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and the function thereof is not described herein again.
In the case of using the integrated module, the display effect correction apparatus of the display device includes: the device comprises a storage unit, a processing unit and an interface unit. The processing unit is used for controlling and managing the action of the display effect correction device of the display device, for example, the processing unit is used for supporting the display effect correction device of the display device to execute the processes S101, 103 and 105 in fig. 2; the interface unit is used to support the display effect correction apparatus of the display device to execute the processes S102, 104 in fig. 2. And a storage unit for storing program codes and data of the terminal device.
For example, the processing unit is a processor, the storage unit is a memory, and the interface unit is a communication interface. The terminal device shown in fig. 8 includes a communication interface 801, a processor 1002, a memory 803, and a bus 804, and the communication interface 801 and the processor 802 are connected to the memory 803 through the bus 804.
The processor 802 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an Application-Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to control the execution of programs in accordance with the teachings of the present disclosure.
The Memory 803 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.
The memory 803 is used for storing application program codes for executing the scheme of the application, and the execution of the application program codes is controlled by the processor 802. The communication interface 801 is used for executing the steps 102, 104 shown in fig. 2. The processor 802 is configured to execute application program code stored in the memory 803 to implement the methods described in the embodiments of the present application.
Further, a computing storage medium (or media) is also provided, comprising instructions which, when executed, perform the operations of the method in the above embodiments.
Additionally, a computer program product is also provided, comprising the above-described computing storage medium (or media).
It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. A display effect correction method of a display device, comprising:
controlling the display equipment to enter a to-be-tested mode and displaying a default graphic card;
acquiring display characteristic data at a preset gray scale acquired on the display equipment;
interpolating the display characteristic data at the preset gray scale to obtain display characteristic data at all gray scales; when the gray scale number K is in the first gray scale interval, performing interpolation by a power exponent interpolation method;
calculating the value of x according to the following formula, and interpolating the first gray scale interval according to the power exponent of x:
wherein GY25 represents the Y stimulus value of the G card at the gray scale of 25, GY0 represents the Y stimulus value of the G card at the gray scale of 0, GY50 represents the Y stimulus value of the G card at the gray scale of 50, where the gray scale of 50 is the inflection point;
when the gray scale number K is in a second gray scale interval, interpolating by adopting a linear interpolation method, wherein the second gray scale interval comprises a plurality of subintervals, and the slopes of linear interpolation of different subintervals are different;
calculating color coordinates to be detected according to the display characteristic data of each gray scale;
when the color coordinate to be detected and the target color coordinate are determined to be smaller than a preset error value, determining adjusted display characteristic data according to the color coordinate to be detected;
generating a display look-up table (LUT) according to the adjusted display characteristic data;
the LUT comprises a mapping relation between display characteristic data at all gray scales on the display device and the adjusted display characteristic data;
loading the LUT on the display equipment so that the display equipment can display a detection graphic card according to the display characteristic data adjusted in the LUT;
and detecting the detection graphic card, and if the detection graphic card does not meet the test standard, acquiring display characteristic data at a preset gray scale on the detection graphic card to regenerate the LUT.
2. The method of claim 1, wherein loading the display look-up table on the display device comprises: sending a control command conforming to a predetermined format to the display device, the control command including the LUT;
the predetermined format includes: a start code, a length, a command code, a data bit, a check bit, and an end code, wherein the LUT is included in the data bit.
3. The method of claim 2, further comprising: receiving a response message in response to the control command, the response message having a format including: start code, length, command code, data bits, check bits, and end code.
4. A display effect correction apparatus of a display device, comprising:
the processing module is used for controlling the display equipment to enter a to-be-tested mode and displaying a default graphic card;
the acquisition module is used for acquiring display characteristic data at a preset gray scale acquired on the display equipment;
the processing module is specifically used for interpolating the display characteristic data at the preset gray scale to obtain the display characteristic data at all gray scales;
when the gray scale number K is in the first gray scale interval, performing interpolation by a power exponent interpolation method;
calculating the value of x according to the following formula, and interpolating the first gray scale interval according to the power exponent of x:
wherein GY25 represents the Y stimulus value of the G card at the gray scale of 25, GY0 represents the Y stimulus value of the G card at the gray scale of 0, GY50 represents the Y stimulus value of the G card at the gray scale of 50, where the gray scale of 50 is the inflection point;
when the gray scale number K is in a second gray scale interval, interpolating by adopting a linear interpolation method, wherein the second gray scale interval comprises a plurality of subintervals, and the slopes of linear interpolation of different subintervals are different;
calculating color coordinates to be detected according to the display characteristic data of each gray scale; when the color coordinate to be detected and the target color coordinate are determined to be smaller than the preset error, determining adjusted display characteristic data according to the color coordinate to be detected, and generating a display lookup table (LUT) according to the adjusted display characteristic data;
the LUT comprises a mapping relation between display characteristic data at all gray scales on the display device and the adjusted display characteristic data;
the loading module is used for loading the LUT on the display equipment so that the display equipment can display the detection graphic card according to the display characteristic data adjusted in the LUT;
and the detection module is used for detecting the detection graphic card, and if the detection graphic card does not accord with the detection standard, the display characteristic data of the preset gray scale position is collected on the detection graphic card to regenerate the LUT.
5. The apparatus according to claim 4, wherein the loading module is specifically configured to send a control command conforming to a predetermined format to the display device, the control command including the display lookup table; the predetermined format includes: a start code, a length, a command code, a data bit, a check bit, and an end code, wherein the display lookup table is included in the data bit.
6. The apparatus of claim 5, wherein the obtaining module is further configured to receive a response message in response to the control command, and a format of the response message comprises: start code, length, command code, data bits, check bits, and end code.
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