CN112819908A - White coordinate adjusting method and device, display and storage medium - Google Patents
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Abstract
The invention provides a method and a device for adjusting white coordinates, a display and a storage medium, wherein the method comprises the following steps: the method comprises the steps of obtaining specifications of RGB (red, green and blue) tricolor lamps of equipment to be adjusted, multiple groups of control signals and a first tristimulus value of the equipment to be adjusted; calculating to obtain a plurality of groups of second tristimulus values corresponding to the central point of the white chart according to the first tristimulus values and the plurality of groups of control signals; calculating to obtain multiple groups of corresponding first color coordinates according to multiple groups of second tri-stimulus values; calculating difference values of a plurality of groups of first color coordinates and preset target color coordinates; and selecting the control signal corresponding to the minimum difference value to adjust the white coordinate of the equipment to be adjusted. The method and the device can ensure the accuracy of white coordinate adjustment and improve the adjustment efficiency.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a method and an apparatus for adjusting a white coordinate, a display, and a storage medium.
Background
With the advancement of technology, various display devices and projection devices play an increasingly important role in people's daily life, and any projection device and display device degree cannot be adjusted without departing from white coordinates.
In the prior art, there are two main ways to adjust the white coordinate: one is to burn several sets of RGB ratios in an optical machine in advance, traverse the several sets of ratios, find a set of RGB ratios corresponding to a picture white coordinate closest to a target white coordinate according to a corresponding picture white coordinate generated by traversing the RGB ratios, but often the variation degree of the optical machine can be matched only by burning multiple sets of RGB ratios because of too large difference between LEDs, but the number of ratios burned in the optical machine is limited, so that the RGB ratios are burned for many times, and the testing efficiency is influenced; the other method is to calculate the duty ratio meeting the white coordinate requirement by using the tristimulus values of the red, green and blue monochromatic lamps and the target color coordinates, the method is high in efficiency, but the calculated duty ratio is non-integer, and the duty ratios required to be set by the optical machine are all integers, so that the result needs to be rounded off and the like to be changed into the integer, and the accuracy of white coordinate adjustment is influenced.
Disclosure of Invention
The invention mainly aims to provide a method and a device for adjusting white coordinates, a display and a storage medium, aiming at improving the adjustment efficiency while ensuring the accuracy of white coordinate adjustment.
In order to achieve the above object, the present invention provides a method for adjusting white coordinates, comprising the steps of:
the method comprises the steps of obtaining specifications of RGB (red, green and blue) tricolor lamps of equipment to be adjusted, multiple groups of control signals and a first tristimulus value of the equipment to be adjusted;
calculating to obtain a plurality of groups of second tristimulus values corresponding to the central point of the white chart according to the first tristimulus values and the plurality of groups of control signals;
calculating to obtain multiple groups of corresponding first color coordinates according to multiple groups of second tri-stimulus values;
calculating difference values of a plurality of groups of first color coordinates and preset target color coordinates;
and selecting the control signal corresponding to the minimum difference value to adjust the white coordinate of the equipment to be adjusted.
Optionally, the step of obtaining a first tri-stimulus value of the device to be adjusted includes:
respectively lighting RGB (red, green and blue) tricolor lamps in the equipment to be adjusted by using control signals of burning default duty ratios in the equipment to be adjusted;
and respectively obtaining first tristimulus values of the projection central points of the images when RGB three colors and the like are sequentially lightened.
Optionally, the second tristimulus value is calculated by the following formula:
WhiteXi＝RDCi*RX/DefaultRDC+GDCi*GX/DefaultGDC+BDCi*BX/DefaultBDC
WhiteYi＝RDCi*RY/DefaultRDC+GDCi*GY/DefaultGDC+BDCi*BY/DefaultBDC
WhiteZi＝RDCi*RZ/DefaultRDC+GDCi*GZ/DefaultGDC+BDCi*BZ/DefaultBDC
wherein Whitexi, WhiteYi and WhiteZi are tristimulus values of the central point of a white graph after three lamps are mixed, RX, RY and RZ are tristimulus values of red lamps, GX, GY and GZ are tristimulus values of green lamps, BX, BY and BZ are tristimulus values of blue lamps, DefaultDCs, DefaultGDCs and DefaultBDCs are first tristimulus values, and RDCi, GDCi and BDCi are group i control signals.
Optionally, the step of obtaining multiple sets of corresponding first color coordinates according to multiple sets of second tristimulus values includes:
and calculating to obtain multiple groups of corresponding first color coordinates and brightness values according to the multiple groups of second tri-stimulus values.
The step of calculating the difference value between the multiple groups of first color coordinates and preset target color coordinates comprises the following steps:
selecting a second color coordinate corresponding to a preset condition that the brightness value accords with the preset condition from the multiple groups of first color coordinates;
and calculating a difference value between the second color coordinate and a preset target color coordinate.
Optionally, the first color coordinate is calculated by the following formula:
xi＝WhiteXi/(WhiteXi+WhiteYi+WhiteZi)
yi＝WhiteYi/(WhiteXi+WhiteYi+WhiteZi)
wherein, Whitexi, WhiteYi and WhiteZi are tristimulus values of the central point of the white picture after three-lamp color mixing, and xi and yi are first color coordinates of the central point of the white picture after three-lamp color mixing.
Alternatively, the luminance value Yi ═ WhiteYi is calculated by the following formula.
Optionally, the difference value is calculated by the following formula:
△Diff＝(xi–Desiredx)*(xi–Desiredx)+(yi–Desiredy)*(yi–Desiredy)
wherein, Δ Diff is a difference value between the color coordinates corresponding to the ith group of control signals and the target color coordinates, and Desiredx and Desiredy are the target color coordinates.
In addition, to achieve the above object, the present invention further provides an adjusting apparatus of white coordinates, the apparatus including a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program implementing the steps of the adjusting method of white coordinates as described above when executed by the processor.
Further, to achieve the above object, the present invention also provides a display including a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program implementing the steps of the white coordinate adjusting method as described above when executed by the processor.
Further, to achieve the above object, the present invention provides a computer-readable storage medium having stored thereon a subtitle display program, the program implementing the white coordinate adjusting method described above when executed by a processor.
The specification of an RGB (red, green and blue) three-color lamp of equipment to be adjusted, a plurality of groups of control signals and a first tristimulus value of the equipment to be adjusted are obtained; calculating to obtain a plurality of groups of second tristimulus values corresponding to the central point of the white chart according to the first tristimulus values and the plurality of groups of control signals; calculating to obtain multiple groups of corresponding first color coordinates according to multiple groups of second tri-stimulus values; calculating difference values of a plurality of groups of first color coordinates and preset target color coordinates; and selecting the control signal corresponding to the minimum difference value to adjust the white coordinate of the equipment to be adjusted. Through the mode, the tristimulus values of the central points of the multiple groups of corresponding white maps are calculated by using the tristimulus values and the multiple groups of control signals of the equipment to be adjusted, then the paired color coordinates are calculated, and the control signal corresponding to the color coordinate with the minimum difference with the target color coordinate is used as the adjustment signal of the white coordinate to realize the adjustment of the white coordinate.
Drawings
Fig. 1 is a schematic hardware configuration diagram of a white coordinate adjusting apparatus according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for adjusting white coordinates according to a first embodiment of the present invention;
fig. 3 is a flowchart illustrating a white coordinate adjustment method according to a second embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic hardware structure diagram of an apparatus for adjusting a white coordinate according to an embodiment of the present invention.
The white coordinate adjusting apparatus may include a processor 1001, a communication module 1002, a memory 1003, and the like in terms of a hardware configuration. It will be understood by those skilled in the art that the white coordinate adjustment mechanism configuration shown in fig. 1 does not constitute a limitation of the white coordinate adjustment mechanism, and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used. The processor 1001 is connected to the memory 1002 and the communication module 1002, respectively, the memory 1002 stores a white coordinate adjustment program, the white coordinate adjustment program is executed by the processor 1001, and the steps of the following method embodiments are implemented when the white coordinate adjustment program is executed.
The processor 1001, which is a control center of the white coordinate adjusting apparatus, connects the respective parts of the entire white coordinate adjusting apparatus by various interfaces and lines, and performs various functions and processes of the white coordinate adjusting apparatus by running or executing software programs and/or modules stored in the memory 1003 and calling data stored in the memory 1003, thereby performing overall monitoring of the white coordinate adjusting apparatus. Processor 1001 may include one or more processing units; alternatively, the processor 1001 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 1001.
The communication module 1002 may be connected to an external communication device through a network. The communication module 1002 may receive a request from an external communication device, and may also send a request, an instruction, and information to the external communication device. The external communication device may be a user terminal or other system server, etc.
The memory 1003 may be used to store software programs and various data. The memory 1003 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may include a database, and the storage data area may store data or information created according to the use of the adjustment device of white coordinates, or the like. Further, the memory 1003 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
Although not shown in fig. 1, the white coordinate adjusting apparatus may further include a circuit control module for connecting to a power supply to ensure the normal operation of other components.
Various embodiments of the method of the present invention are presented in terms of the above-described hardware architecture.
Please refer to fig. 2, which is a flowchart illustrating a method for adjusting a white coordinate according to a first embodiment of the present invention.
In an embodiment of the present invention, the method is used for an apparatus for adjusting white coordinates, and the method includes the following steps:
step S100, obtaining the specification of an RGB (red, green and blue) tricolor lamp of equipment to be adjusted, a plurality of groups of control signals and a first tristimulus value of the equipment to be adjusted;
the device to be adjusted applied by the invention can comprise various display devices or projection devices and other devices which need to be adjusted by white coordinates, in the process of adjusting the white coordinates, the specification of RGB (red, green and blue) tricolor lamps in the device to be adjusted needs to be obtained, a plurality of groups of control signals with duty ratio proportion are preset in the program, and the tristimulus value of the adjusting device is obtained, wherein the tristimulus value can be the tristimulus value preset in the device to be adjusted or can be obtained by carrying out tristimulus measurement through the control signal with default duty ratio in the device to be adjusted. Specifically, the process of performing tri-stimulus measurement by the control signal of the default duty cycle in the device to be adjusted includes:
respectively lighting RGB (red, green and blue) tricolor lamps in the equipment to be adjusted by using control signals of burning default duty ratios in the equipment to be adjusted;
and respectively obtaining first tristimulus values of the projection central points of the images when RGB three colors and the like are sequentially lightened.
As an embodiment, the present embodiment sequentially lights the RGB monochromatic lamps of the device to be adjusted using the control signal with the default duty ratio, and then measures the lighted monochromatic images of the monochromatic lamps, specifically, the illuminometer may be used to measure the tristimulus values of the central point of the projection image, and record the tristimulus values of the Red LED lamps as RX, RY and RZ, the tristimulus values of the Green LED lamps as GX, GY and GZ, the tristimulus values of the Blue LED lamps as BX, BY and BZ, respectively, and define each of the measured monochromatic stimulation values as the first tristimulus value.
As another embodiment, the tested tristimulus values may also be stored in the device to be adjusted, and the stored first tristimulus values may then be directly read during the adjustment process.
Step S200, calculating and obtaining a plurality of groups of second tristimulus values corresponding to the central point of the white chart according to the first tristimulus values and a plurality of groups of control signals;
after obtaining the first tristimulus values, calculating and obtaining a plurality of groups of second tristimulus values corresponding to the central point of the white graph according to the first tristimulus values and a plurality of groups of control signals, specifically calculating the second tristimulus values by the following formula:
WhiteXi＝RDCi*RX/DefaultRDC+GDCi*GX/DefaultGDC+BDCi*BX/DefaultBDC
WhiteYi＝RDCi*RY/DefaultRDC+GDCi*GY/DefaultGDC+BDCi*BY/DefaultBDC
WhiteZi＝RDCi*RZ/DefaultRDC+GDCi*GZ/DefaultGDC+BDCi*BZ/DefaultBDC
wherein Whitexi, WhiteYi and WhiteZi are tristimulus values of the central point of a white graph after three lamps are mixed, RX, RY and RZ are tristimulus values of red lamps, GX, GY and GZ are tristimulus values of green lamps, BX, BY and BZ are tristimulus values of blue lamps, DefaultDCs, DefaultGDCs and DefaultBDCs are first tristimulus values, and RDCi, GDCi and BDCi are group i control signals.
After each group of control signals is calculated through the formula, the second tristimulus values with corresponding quantity can be obtained. It should be noted that the duty cycle of each set of control signals is different, so as to avoid repeated calculation. Further, to ensure the calculation result, the plurality of sets of control signals need to satisfy the variation degree of the device to be adjusted.
Step S300, calculating and obtaining a plurality of groups of corresponding first color coordinates according to a plurality of groups of second tristimulus values;
after obtaining a plurality of groups of second stimulus values, according to the relationship between the chromaticity tristimulus values and the color coordinates and the brightness, and according to the plurality of groups of second tristimulus values, a plurality of groups of corresponding first color coordinates are obtained by calculation, specifically, the first color coordinates are calculated by the following formula: xi ═ Whitexi/(Whitexi + WhiteYi + WhiteZi)
yi＝WhiteYi/(WhiteXi+WhiteYi+WhiteZi)
Wherein, the WhiteXi, the WhiteYi and the WhiteZi are tristimulus values of the central point of the white picture after the three-lamp color mixing, xi and yi are first color coordinates of the central point of the white picture after the three-lamp color mixing, that is, xi and yi are first color coordinates obtained by the calculation of the ith group of control signals, and at this time, the first color coordinates are the first color coordinates of the central point of the white picture after the three colors are mixed.
Step S400, calculating difference values of a plurality of groups of first color coordinates and preset target color coordinates;
and S500, selecting a control signal corresponding to the minimum difference value to adjust the white coordinate of the equipment to be adjusted.
And calculating according to the obtained first color coordinate and a preset target color coordinate, calculating a difference value between the first color coordinate and the preset target color coordinate, selecting the first color coordinate with the minimum difference value from the obtained multiple difference values, wherein the first color coordinate with the minimum difference value is the value closest to the target color coordinate, then reversely searching a control signal of the color coordinate with the minimum difference value obtained by calculation, defining the control signal as a target control signal, and adjusting the white coordinate according to the target control signal. Specifically, the difference value Δ Diff between the first color coordinate and the preset target color coordinate is calculated by the following formula (xi-Desiredx) ((xi-Desiredx) + (yi-Desiredy) (yi-Desiredy))
Wherein, Δ Diff is a difference value between the color coordinates corresponding to the ith group of control signals and the target color coordinates, and Desiredx and Desiredy are the target color coordinates.
The specification of an RGB (red, green and blue) three-color lamp of equipment to be adjusted, a plurality of groups of control signals and a first tristimulus value of the equipment to be adjusted are obtained; calculating to obtain a plurality of groups of second tristimulus values corresponding to the central point of the white chart according to the first tristimulus values and the plurality of groups of control signals; calculating to obtain multiple groups of corresponding first color coordinates according to multiple groups of second tri-stimulus values; calculating difference values of a plurality of groups of first color coordinates and preset target color coordinates; and selecting the control signal corresponding to the minimum difference value to adjust the white coordinate of the equipment to be adjusted. Through the mode, the tristimulus values of the central points of the multiple groups of corresponding white maps are calculated by using the tristimulus values and the multiple groups of control signals of the equipment to be adjusted, then the paired color coordinates are calculated, and the control signal corresponding to the color coordinate with the minimum difference with the target color coordinate is used as the adjustment signal of the white coordinate to realize the adjustment of the white coordinate.
Please refer to fig. 3, which is a flowchart illustrating a white coordinate adjusting method according to a second embodiment of the present invention. :
step S100, obtaining the specification of an RGB (red, green and blue) tricolor lamp of equipment to be adjusted, a plurality of groups of control signals and a first tristimulus value of the equipment to be adjusted;
the device to be adjusted applied by the invention can comprise various display devices or projection devices and other devices which need to be adjusted by white coordinates, in the process of adjusting the white coordinates, the specification of RGB (red, green and blue) tricolor lamps in the device to be adjusted needs to be obtained, a plurality of groups of control signals with duty ratio proportion are preset in the program, and the tristimulus value of the adjusting device is obtained, wherein the tristimulus value can be the tristimulus value preset in the device to be adjusted or can be obtained by carrying out tristimulus measurement through the control signal with default duty ratio in the device to be adjusted. Specifically, the process of performing tri-stimulus measurement by the control signal of the default duty cycle in the device to be adjusted includes:
respectively lighting RGB (red, green and blue) tricolor lamps in the equipment to be adjusted by using control signals of burning default duty ratios in the equipment to be adjusted;
and respectively obtaining first tristimulus values of the projection central points of the images when RGB three colors and the like are sequentially lightened.
As an embodiment, the present embodiment sequentially lights the RGB monochromatic lamps of the device to be adjusted using the control signal with the default duty ratio, and then measures the lighted monochromatic images of the monochromatic lamps, specifically, the illuminometer may be used to measure the tristimulus values of the central point of the projection image, and record the tristimulus values of the Red LED lamps as RX, RY and RZ, the tristimulus values of the Green LED lamps as GX, GY and GZ, the tristimulus values of the Blue LED lamps as BX, BY and BZ, respectively, and define each of the measured monochromatic stimulation values as the first tristimulus value.
As another embodiment, the tested tristimulus values may also be stored in the device to be adjusted, and the stored first tristimulus values may then be directly read during the adjustment process.
Step S200, calculating and obtaining a plurality of groups of second tristimulus values corresponding to the central point of the white chart according to the first tristimulus values and a plurality of groups of control signals;
after obtaining the first tristimulus values, calculating and obtaining a plurality of groups of second tristimulus values corresponding to the central point of the white graph according to the first tristimulus values and a plurality of groups of control signals, specifically calculating the second tristimulus values by the following formula:
WhiteXi＝RDCi*RX/DefaultRDC+GDCi*GX/DefaultGDC+BDCi*BX/DefaultBDC
WhiteYi＝RDCi*RY/DefaultRDC+GDCi*GY/DefaultGDC+BDCi*BY/DefaultBDC
WhiteZi＝RDCi*RZ/DefaultRDC+GDCi*GZ/DefaultGDC+BDCi*BZ/DefaultBDC
wherein Whitexi, WhiteYi and WhiteZi are tristimulus values of the central point of a white graph after three lamps are mixed, RX, RY and RZ are tristimulus values of red lamps, GX, GY and GZ are tristimulus values of green lamps, BX, BY and BZ are tristimulus values of blue lamps, DefaultDCs, DefaultGDCs and DefaultBDCs are first tristimulus values, and RDCi, GDCi and BDCi are group i control signals.
After each group of control signals is calculated through the formula, the second tristimulus values with corresponding quantity can be obtained. It should be noted that the duty cycle of each set of control signals is different, so as to avoid repeated calculation. Further, to ensure the calculation result, the plurality of sets of control signals need to satisfy the variation degree of the device to be adjusted.
Step S310, calculating and obtaining multiple groups of corresponding first color coordinates and brightness values according to multiple groups of second tri-stimulus values;
the difference between this embodiment and the previous embodiment is mainly that, in order to ensure the display effect, the device to be adjusted can display better brightness, and therefore, the corresponding brightness value is also calculated. Although the luminance value is not calculated in the first embodiment, a person skilled in the art can supplement the luminance by adding white light in the band adjusting device.
After obtaining a plurality of groups of second stimulus values, according to the relationship between the chromaticity tristimulus values and the color coordinates and the brightness, and according to the plurality of groups of second tristimulus values, a plurality of groups of corresponding first color coordinates are obtained by calculation, specifically, the first color coordinates are calculated by the following formula: xi ═ Whitexi/(Whitexi + WhiteYi + WhiteZi)
yi＝WhiteYi/(WhiteXi+WhiteYi+WhiteZi)
Yi＝WhiteYi
Wherein, WhiteXi, WhiteYi and WhiteZi are tristimulus values of the central point of the white map after the three-lamp color mixing, xi and Yi are first color coordinates of the central point of the white map after the three-lamp color mixing, that is, xi and Yi are first color coordinates obtained by the calculation of the ith group of control signals, that is, the first color coordinates of the central point of the white map after the three colors are mixed, and Yi is a brightness value.
Step S410, selecting a second color coordinate corresponding to a brightness value meeting a preset condition from the plurality of sets of first color coordinates;
step S420, calculating a difference value between the second color coordinate and a preset target color coordinate;
and S500, selecting a control signal corresponding to the minimum difference value to adjust the white coordinate of the equipment to be adjusted.
In this embodiment, in order to further improve the calculation efficiency, in this embodiment, the luminance values are first filtered to screen out the luminance values that do not meet the requirement, so as to eliminate the color coordinates corresponding to the luminance values that do not meet the requirement from the first color coordinates, and the color coordinates corresponding to the remaining luminance values that meet the requirement in the first color coordinates are defined as the second color coordinates.
At this time, calculation is performed according to the obtained second color coordinate and a preset target color coordinate, and a difference value between the obtained second color coordinate and the preset target color coordinate is calculated, so that the second color coordinate with the smallest difference value is selected according to the obtained plurality of difference values, the second color coordinate with the smallest difference value is a value closest to the target color coordinate, then a control signal of the color coordinate with the smallest difference value obtained by calculation is reversely searched and defined as a target control signal, and the white coordinate can be adjusted according to the target control signal. Specifically, the difference Δ Diff between the second color coordinates and the preset target color coordinates is calculated by the following formula (xi-Desiredx) ((xi-Desiredx) + (yi-Desiredy) (yi-Desiredy))
Wherein, Δ Diff is a difference value between the color coordinates corresponding to the ith group of control signals and the target color coordinates, and Desiredx and Desiredy are the target color coordinates.
Compared with the previous embodiment, the first screening is performed through the brightness value, so that the calculation amount is reduced, and the efficiency is further improved.
In addition, in order to achieve the above object, the present invention further provides a subtitle display apparatus, where the apparatus includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the computer program is executed by the processor, the steps of the method for adjusting white coordinates according to any one of the above embodiments are implemented, which are not described herein again.
Further, to achieve the above object, the present invention also provides a display including a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program implementing the steps of the white coordinate adjusting method as described above when executed by the processor.
In addition, to achieve the above object, the present invention further provides a computer-readable storage medium, which may be a Memory in the subtitle display apparatus of fig. 1, and may also be at least one of a ROM (Read-only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, and the computer-readable storage medium includes instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, a terminal, or a network device) having a processor to execute the white coordinate adjusting method according to the embodiments of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
Furthermore, the descriptions related to "first", "second", "third", "fourth", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, features defined as "first," "second," "third," and "fourth" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. 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 (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for adjusting white coordinates, the method comprising the steps of:
the method comprises the steps of obtaining specifications of RGB (red, green and blue) tricolor lamps of equipment to be adjusted, multiple groups of control signals and a first tristimulus value of the equipment to be adjusted;
calculating to obtain a plurality of groups of second tristimulus values corresponding to the central point of the white chart according to the first tristimulus values and the plurality of groups of control signals;
calculating to obtain multiple groups of corresponding first color coordinates according to multiple groups of second tri-stimulus values;
calculating difference values of a plurality of groups of first color coordinates and preset target color coordinates;
and selecting the control signal corresponding to the minimum difference value to adjust the white coordinate of the equipment to be adjusted.
2. The method for adjusting white coordinates according to claim 1, wherein the step of obtaining the first tristimulus value of the device to be adjusted comprises:
respectively lighting RGB (red, green and blue) tricolor lamps in the equipment to be adjusted by using control signals of burning default duty ratios in the equipment to be adjusted;
and respectively obtaining first tristimulus values of the projection central points of the images when RGB three colors and the like are sequentially lightened.
3. The method for adjusting a white coordinate according to claim 2, wherein the second tristimulus value is calculated by the following formula:
WhiteXi＝RDCi*RX/DefaultRDC+GDCi*GX/DefaultGDC+BDCi*BX/DefaultBDC
WhiteYi＝RDCi*RY/DefaultRDC+GDCi*GY/DefaultGDC+BDCi*BY/DefaultBDC
WhiteZi＝RDCi*RZ/DefaultRDC+GDCi*GZ/DefaultGDC+BDCi*BZ/DefaultBDC
wherein Whitexi, WhiteYi and WhiteZi are tristimulus values of the central point of a white graph after three lamps are mixed, RX, RY and RZ are tristimulus values of red lamps, GX, GY and GZ are tristimulus values of green lamps, BX, BY and BZ are tristimulus values of blue lamps, DefaultDCs, DefaultGDCs and DefaultBDCs are first tristimulus values, and RDCi, GDCi and BDCi are group i control signals.
4. The method for adjusting white coordinates according to claim 1, wherein the step of obtaining a plurality of sets of corresponding first color coordinates according to a plurality of sets of the second tristimulus values comprises:
and calculating to obtain multiple groups of corresponding first color coordinates and brightness values according to the multiple groups of second tri-stimulus values.
The step of calculating the difference value between the multiple groups of first color coordinates and preset target color coordinates comprises the following steps:
selecting a second color coordinate corresponding to a preset condition that the brightness value accords with the preset condition from the multiple groups of first color coordinates;
and calculating a difference value between the second color coordinate and a preset target color coordinate.
5. The method for adjusting a white coordinate according to claim 4, wherein the first color coordinate is calculated by the following formula:
xi＝WhiteXi/(WhiteXi+WhiteYi+WhiteZi)
yi＝WhiteYi/(WhiteXi+WhiteYi+WhiteZi)
wherein, Whitexi, WhiteYi and WhiteZi are tristimulus values of the central point of the white picture after three-lamp color mixing, and xi and yi are first color coordinates of the central point of the white picture after three-lamp color mixing.
6. The method of adjusting a white coordinate according to claim 5, wherein the luminance value Yi ═ WhiteYi is calculated by the following formula.
7. The method for adjusting white coordinates according to claim 5, wherein the difference value is calculated by the following formula:
△Diff＝(xi–Desiredx)*(xi–Desiredx)+(yi–Desiredy)*(yi–Desiredy)
wherein, Δ Diff is a difference value between the color coordinates corresponding to the ith group of control signals and the target color coordinates, and Desiredx and Desiredy are the target color coordinates.
8. An apparatus for adjusting white coordinates, the apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method for adjusting white coordinates according to any one of claims 1 to 7.
9. A display, characterized in that the apparatus comprises a memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method of adjustment of white coordinates of any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that a subtitle display program is stored on the computer-readable storage medium, which when executed by a processor implements the steps of the method for adjusting white coordinates of any one of claims 1 to 7.
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