CN110277076A - A kind of Color Mapping Approach and device, display equipment, medium - Google Patents

A kind of Color Mapping Approach and device, display equipment, medium Download PDF

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Publication number
CN110277076A
CN110277076A CN201910662653.9A CN201910662653A CN110277076A CN 110277076 A CN110277076 A CN 110277076A CN 201910662653 A CN201910662653 A CN 201910662653A CN 110277076 A CN110277076 A CN 110277076A
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under
primary colors
primaries
point
signal value
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CN110277076B (en
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孙炎
张小牤
习艳会
代斌
毕育欣
时凌云
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature

Abstract

This application discloses a kind of Color Mapping Approach and devices, display equipment, medium, which includes: to determine the tristimulus values and chromaticity coordinates under its corresponding three primary colors to the tristimulus signal value under one group of three primary colors；According to the chromaticity coordinates under the three primary colors and the first mapping relations are preset, determine the chromaticity coordinates under five primaries；According to the chromaticity coordinates under predefined constraint condition and the five primaries, multicolored signal value under the corresponding five primaries of tristimulus signal value under the three primary colors is determined.Scheme provided in this embodiment realizes conversion of the three primary colors to five primaries, expands colour gamut.

Description

A kind of Color Mapping Approach and device, display equipment, medium
Technical field
This application involves display technology, espespecially a kind of Color Mapping Approach and device, display equipment, medium.
Background technique
Display technology of today is the display methods based on three primary colors RGB, and the gamut area covered depends on RGB tri- The position of coordinate points.Fig. 1 is several frequently seen standard color gamut schematic diagram.As shown in Figure 1, including sRGB colour gamut 1, Adobe RGB Colour gamut 2, NTSC color gamut 3, BT2020 colour gamut 4 and DCI-P3 colour gamut 5.Wherein BT2020 colour gamut 4 has been current maximum colour gamut, but Still having in terms of cyan can not greatly cover；And for purer (i.e. gamut area that liquid crystal display, the color film of RGB are done It is bigger) its light transmittance is poorer, as shown in Fig. 2, therefore, be bound to power consumption to be increased.More primary colors display technologies are shown in traditional RGB Increase at least one primary colors on the basis of technology, can effectively expand colour gamut or play the role of reducing power consumption, but at three kinds Above color shows that needing algorithm regulates and controls, and is a big technical problem.
Summary of the invention
A present invention at least embodiment provides a kind of Color Mapping Approach and device, display equipment, medium, realizes different The conversion of colour gamut.
In order to reach the object of the invention, a present invention at least embodiment provides a kind of Color Mapping Approach, comprising:
To the tristimulus signal value under one group of three primary colors, the chromaticity coordinates under its corresponding three primary colors is determined；
According to the chromaticity coordinates under the three primary colors and the first mapping relations are preset, determine the chromaticity coordinates under five primaries；
According to the chromaticity coordinates under predefined constraint condition and the five primaries, three colors under the three primary colors are determined Multicolored signal value under the corresponding five primaries of signal value；Wherein, the predefined constraint condition includes: three originals under five primaries The signal value of color and signal value under three primary colors meet default second mapping relations, wherein the three primary colors under five primaries refer to Identical three primary colors under three primary colors.
In one embodiment, default first mapping relations are as follows:
Wherein, WP0 is point W and point P0Distance, WP1 is point W and point P1Distance, WA is the distance of point W and point A, and WB is The distance of point W and point B, point W are the white point under three primary colors, point P0It is the corresponding point of chromaticity coordinates under three primary colors, point P1It is five primaries Under the corresponding point of chromaticity coordinates, point A is point W and point P0Line and three primary colors gamut boundary intersection point, point B is point W and point P0's The intersection point of line and five primaries gamut boundary.
In one embodiment, the signal value under the trichromatic signal value under the five primaries and three primary colors meets default the Two mapping relations include:
R1:G1:B1=R0:G0:B0
Wherein, R1, G1, B1 are the trichromatic signal value under five primaries, and R0, G0, B0 are the signal value under three primary colors.
In one embodiment, the method also includes determining the corresponding three primary colors of tristimulus signal value under the three primary colors Under tristimulus values；
The predefined constraint condition further include: the chromaticity coordinates under tristimulus values and five primaries, three originals under five primaries Tristimulus values under color meets default third mapping relations.
In one embodiment, the chromaticity coordinates under the tristimulus values and five primaries under the five primaries, three thorns under three primary colors Swashing the default third mapping relations of value satisfaction includes:
Wherein, X1, Y1, Z1 are the tristimulus values under five primaries, and x1, y1, z1 are the chromaticity coordinates under five primaries, X0, Y0, Z0 For the tristimulus values under three primary colors.
In one embodiment, the chromaticity coordinates according under predefined constraint condition and the five primaries, determines institute The multicolored signal value stated under the corresponding five primaries of tristimulus signal value under three primary colors includes:
According to the chromaticity coordinates under predefined constraint condition and the five primaries, five chrominance signal initial value R1 are determined, G1, B1, Ye1, C1；
Multicolored the signal value R, G, B, Ye, C under five primaries are determined according to the following formula:
Wherein, MAX5=max (R1, G1, B1, Ye1, C1),Y0 is the tristimulus values under three primary colors The value of brightness is represented in (X0, Y0, Z0), the maximum brightness that Ymax can show for the corresponding point of the tristimulus signal value is described Ymax are as follows:
Wherein, MAX3=max (R0, G0, B0), R0, G0, B0 are the signal value under three primary colors, YR YG YBFor under three primary colors The tristimulus values of display.
In one embodiment, the chromaticity coordinates according under predefined constraint condition and the five primaries, determines five Chrominance signal initial value R1, G1, B1, Ye1, C1 include:
R1, Ye1, C1 are determined according to the following formula:
It is determined according to R1
Wherein,For the tristimulus values of display under five primaries, x1, y1, z1 five Chromaticity coordinates under primary colors, X0, Y0, Z0 are the tristimulus values under three primary colors, and R0, G0, B0 are the signal value under the three primary colors.
One embodiment of the invention provides a kind of color mapping device, including memory and processor, the memory storage There is program, described program realizes Color Mapping Approach described in any embodiment when reading execution by the processor.
One embodiment of the invention provides a kind of display equipment, including above-mentioned color mapping device.
One embodiment of the invention provides a kind of medium, is stored thereon with the computer program that can be run on a processor, institute State the step of Color Mapping Approach described in any embodiment is realized when computer program is executed by the processor.
Compared with the relevant technologies, one embodiment of the invention includes that the Color Mapping Approach includes: under one group of three primary colors Tristimulus signal value determines tristimulus values and chromaticity coordinates under its corresponding three primary colors；According under the three primary colors chromaticity coordinates and Default first mapping relations, determine the chromaticity coordinates under five primaries；According under predefined constraint condition and the five primaries Chromaticity coordinates determines multicolored signal value under the corresponding five primaries of tristimulus signal value under the three primary colors.It is provided in this embodiment Scheme realizes conversion of the three primary colors to five primaries, expands colour gamut.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand technical solution of the present invention, and constitutes part of specification, with this The embodiment of application technical solution for explaining the present invention together, does not constitute the limitation to technical solution of the present invention.
Fig. 1 is the standard color gamut schematic diagram provided in the related technology；
Fig. 2 is light transmittance schematic diagram in the related technology；
Fig. 3 is the five primaries colour gamut schematic diagram that one embodiment of the invention provides；
Fig. 4 is the Color Mapping Approach flow chart that one embodiment of the invention provides；
Original point position view in the Color Mapping Approach that Fig. 5 provides for one embodiment of the invention；
Mapping process schematic diagram in the Color Mapping Approach that Fig. 6 a provides for one embodiment of the invention；
Fig. 6 b be another embodiment of the present invention provides Color Mapping Approach mapping schematic diagram；
Fig. 7 is the Color Mapping Approach flow chart that one embodiment of the invention provides；
Fig. 8 is the color mapping device block diagram that one embodiment of the invention provides；
Fig. 9 is the medium block diagram that one embodiment of the invention provides；
Figure 10 is the display equipment block diagram that one embodiment of the invention provides.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application Feature can mutual any combination.
Step shown in the flowchart of the accompanying drawings can be in a computer system such as a set of computer executable instructions It executes.Also, although logical order is shown in flow charts, and it in some cases, can be to be different from herein suitable Sequence executes shown or described step.
The theory of all about color-match is all based on trichromatic theory i.e. CIE (Commission Internationale De L'Eclairage, International Commission on Illumination) color-match equation is shown in formula (1) (2), wherein XYZ represents three thorns of color Swash value, RGB three primary colors can be measured with the tristimulus values of display under three primary colors with display color analyzer such as CA-310 (the 3*3 matrix i.e. in formula (1)), can calculate mixed color for the RGB grayscale arbitrarily inputted, then by formula (2) it calculates in chromaticity coordinates (x, y, z) reflection to CIE1931 shape of a hoof chromaticity diagram.For five primaries RGBYC, equally have similar Color-match relationship, see formula (3), wherein the matrix in formula (3)For five originals The tristimulus values of display under color theoretically has infinite multiresolution wherein there are three 5 unknown numbers of equation.
In the application, it may thereby determine that five so that 5 unknown numbers are converted to 3 unknown numbers by applying constraint condition The signal value of primary colors realizes conversion of the three primary colors to five primaries.
In following embodiments, five primaries are RGBYC (i.e. red, green, blue, yellow, cyan), wherein five primaries color The position on the vertex RGB in the boundary of domain is identical as the position on the vertex RGB in three primary colors gamut boundary.Three primary colors RGB, which can be, to be appointed A kind of RGB color domain, than any one of five kinds of colour gamuts as shown in figure 1.When the colour gamut of three primary colors RGB changes, five primaries RGBYC's Colour gamut accordingly changes.
It should be noted that be illustrated by taking five primaries RGBYC as an example in the application, but the application is without being limited thereto, when changing When becoming five primaries as other colors, the application can be still applied.
As shown in figure 3, being the colour gamut schematic diagram of five primaries RGBYC, five primaries RGBYC effectively expands colour gamut.
As shown in figure 4, one embodiment of the invention provides a kind of Color Mapping Approach, comprising:
Step 401, to the tristimulus signal value under one group of three primary colors, the chromaticity coordinates under its corresponding three primary colors is determined；
Step 402, according under the three primary colors chromaticity coordinates and default first mapping relations, determine that the color under five primaries is sat Mark；
Step 403, according to the chromaticity coordinates under predefined constraint condition and the five primaries, the three primary colors are determined Under the corresponding five primaries of tristimulus signal value under multicolored signal value；Wherein, the predefined constraint condition includes: five primaries Under trichromatic signal value and three primary colors under signal value meet default third mapping relations, wherein three under five primaries are former Color refers to and three primary colors identical under three primary colors.It is trichromatic in RGBYC by taking five primaries RGBYC, three primary colors are RBG as an example Signal value refers to the signal value of wherein RGB.Wherein, predefined constraint condition makes 5 unknown numbers be converted to 3 unknown numbers, R, G, B i.e. in formula (3), 5 unknown numbers are converted to 3 unknown numbers in Ye, C.
The RGB tristimulus signal of input can be efficiently converted to five chrominance signal of RGBYC by scheme provided in this embodiment, High colour gamut is utilized in effective expand.
In one embodiment, in the step 401, to the tristimulus signal value under one group of three primary colors, determine its corresponding three Tristimulus values and chromaticity coordinates under primary colors include:
It, can by formula (4), (5) assuming that tristimulus signal value under three primary colors is (R0, G0, B0) (can be normalized to [0,1]) With the tristimulus values (X0, Y0, Z0) and chromaticity coordinates P of color after calculating mixing0=(x0, y0, z0), it may be assumed that
P0Position is as shown in Figure 5.It should be noted that the RGB color domain in Fig. 5 is merely illustrative, other can be used RGB color domain.Correspondingly, five primaries RGBYC colour gamut changes accordingly, gamut boundary point R, G, B point of three primary colors and five primaries It sets consistent.
Default first mapping relations in the step 402 can be set as needed.In one embodiment, described default First mapping relations are as follows:
Wherein, WP0 is point W and point P0Distance, WP1 is point W and point P1Distance, WA is the distance of point W and point A, and WB is The distance of point W and point B, point W are the white point under three primary colors, point P0It is the corresponding point of chromaticity coordinates under three primary colors, point P1It is five primaries Under the corresponding point of chromaticity coordinates, point A is point W and point P0Line and three primary colors gamut boundary intersection point, point B is point W and point P0's The intersection point of line and five primaries gamut boundary.Using the mapping mode, form and aspect can be maintained constant, color precise control, and count It calculates simply, can reach preferable effect.
As shown in Figure 6 a, white point W will be divided into triangle WRG, WGB and WRB three small by the triangle on vertex of RGB, only There is the coordinate P when input point0Just there is this step (with P in this example in triangle WRG and WGB0Illustrate in WGB) because add Two primary colors Y and C are contributed in the expansion of color domain in both directions.Realize Color Gamut Mapping, for Fig. 6 a situation, first Extend the line of point W and point P0 point, it will intersect at point A with RGB color domain boundary, intersect at point B with RGBYC colour gamut, will meet The point P of formula (6)1As point corresponding under five primaries, point P1Color be exactly the final color to be shown in five colors display, To obtain point P1Chromaticity coordinates (x1, y1, z1).
It should be noted that the first mapping relations herein are merely illustrative, other modes can also be taken to be mapped.The One mapping relations are linear forms, in other embodiments, can also take non-linear form, Fig. 6 b is the signal of a variety of mapping relations Figure.As shown in Figure 6 b, wherein x-axis represents WP0/WA range in [0,1], and the longitudinal axis is mapping coefficient y=f (x), WP1/WB=f (WP0/WA).Wherein, line 61 is linear relationship, its mapping relations y=x^n1 of line 62, its mapping relations of line 63 are y=x^n2, line 64 its mapping relations are y=1/ (1+exp (a*x+b)).Wherein, n1>1, n2<1, a, b are selected as needed.
In one embodiment, the signal value under the trichromatic signal value under the five primaries and three primary colors meets default the Two mapping relations include:
R1:G1:B1=R0:G0:B0 (7)
At this time
Wherein, R1, G1, B1 are the trichromatic signal value under five primaries, and R0, G0, B0 are the signal value under three primary colors, i.e., Trichromatic ratio is identical as ratio trichromatic under three primary colors under five primaries.By the mapping relations, due to R1, G1, B1 it Between there are proportionate relationships, therefore, as long as it is known one of them, so that it may obtain the value of other two parameter, i.e. R1, G1, B1 tri- A unknown number is converted to a unknown number.It should be noted that the mapping relations are merely illustrative, can according to need using other Mapping relations.
In one embodiment, P is just known that1The chromaticity coordinates (x1, y1, z1) of point can not backstepping go out corresponding tristimulus values (X1, Y1, Z1), therefore, it can use original tristimulus values (X0, Y0, Z0) transformation proportionate relationship.The predefined constraint condition Further include: the chromaticity coordinates under tristimulus values and five primaries under five primaries, the tristimulus values under three primary colors meet default third and reflect Penetrate relationship.
Chromaticity coordinates under tristimulus values and five primaries under the five primaries, the tristimulus under three primary colors in one embodiment Value meets default third mapping relations
Wherein, X1, Y1, Z1 are the tristimulus values under five primaries, and x1, y1, z1 are the chromaticity coordinates under five primaries, X0, Y0, Z0 For the tristimulus values under three primary colors.
In one embodiment, the chromaticity coordinates according under predefined constraint condition and the five primaries, determines institute The multicolored signal value stated under the corresponding five primaries of tristimulus signal value under three primary colors includes:
According to the chromaticity coordinates under predefined constraint condition and the five primaries, five chrominance signal initial value R1 are determined, G1, B1, Ye1, C1；Although it is not true three thorn that (X1, Y1, Z1), which is able to satisfy chromaticity coordinates and falls in P1=(x1, y1, z1) point, Swash value, but (X0, Y0, Z0) be utilized, therefore, R1, G1, B1, Ye1, C1 is adjusted to obtain multicolored signal value R, G, B, Ye, C.
In one embodiment, multicolored the signal value R, G, B, Ye, C under five primaries are determined according to the following formula:
Wherein, MAX5=max (R1, G1, B1, Ye1, C1) is that the maximum value in the five colors makees normalization table in formula (10) Show in point P1The maximum brightness that can be showed, Ky are the brightness ratio relationship of pixel,Y0 is three primary colors Under tristimulus values (X0, Y0, Z0) in represent the value of brightness, Ymax can be showed most for the corresponding point of the tristimulus signal value Big brightness.
In one embodiment, the chromaticity coordinates according under predefined constraint condition and the five primaries, determines five Chrominance signal initial value R1, G1, B1, Ye1, C1 include:
R1, Ye1, C1 are determined according to the following formula:
It is determined according to R1
Wherein,For the tristimulus values of display under five primaries.
In one embodiment, the brightness ratio relationship Ky of pixel is determined by the trichromatic signal value of input.Wherein, Point P0The maximum brightness Ymax that can be showed meets:
Then Ymax are as follows:
Wherein, MAX3=max (R0, G0, B0) takes the maximum value of (R0, G0, B0), in formula (12) to (R0, G0, B0) normalization (maximum value can normalize to 1 in R0 at this time, G0, B0, i.e., maximum).
The present invention is further illustrated below by a specific example.As shown in fig. 7, one embodiment of the invention provides a kind of face Color mapping method, comprising:
Step 701, the chromaticity coordinates and luminance information of the original point of input are calculated；
For one group of input signal (R0, G0, B0) (being normalized to [0,1]), after calculating mixing by formula (4) and (5) The tristimulus values (X0, Y0, Z0) and chromaticity coordinates P of color0=(x0, y0, z0), wherein Y0 represents the brightness of pixel.
Step 702, Color Gamut Mapping is carried out, according to the chromaticity coordinates P under three primary colors0=(x0, y0, z0) is obtained under five primaries Chromaticity coordinates (x1, y1, z1).
Step 703, color-match is carried out.
R1, Ye1, C1 are determined according to formula (11), are determined further according to R1 Root R, G, B, Ye, C are determined according to formula (10), export R, G, B, Ye, C.
Based on the same inventive concept, as shown in figure 8, one embodiment of the invention provides a kind of color mapping device 80, including Memory 810 and processor 820, the memory 810 are stored with program, and described program is held by the processor 820 reading When row, Color Mapping Approach described in any embodiment is realized.According to the color mapping device of the disclosure have with it is described above The same or similar benefit of Color Mapping Approach, details are not described herein again.
Based on the same inventive concept, as shown in figure 9, one embodiment of the invention provides a kind of medium 90, being stored thereon with can The computer program 910 run on a processor, the computer program 910 realize any implementation when being executed by the processor The step of Color Mapping Approach described in example.The medium includes but is not limited to RAM, ROM, EEPROM, flash memory or other storages Device technology, CD-ROM, digital versatile disc (DVD) or other optical disc storages, magnetic holder, tape, disk storage or other magnetic storages Device or any other medium that can be used for storing desired information and can be accessed by a computer.
Based on the same inventive concept, as shown in Figure 10, one embodiment of the invention provides a kind of display equipment 100, including upper State color mapping device 80.The display equipment 100 includes but is not limited to the display screens such as liquid crystal, OLED, alternatively, the display is set Standby 100 can be mobile phone, tablet computer, television set, display, laptop, Digital Frame and navigator etc..According to this public affairs The display equipment 100 opened have with the same or similar benefit of color mapping device described above, details are not described herein again.
It should be noted that it will appreciated by the skilled person that whole in method disclosed hereinabove or certain A little steps, system, functional module/unit in device may be implemented as software, firmware, hardware and its combination appropriate.? In hardware embodiment, the division between functional module/unit referred in the above description not necessarily corresponds to physical assemblies Division；For example, a physical assemblies can have multiple functions or a function or step can be by several physical assemblies Cooperation executes.Certain components or all components may be implemented as by processor, as digital signal processor or microprocessor are held Capable software is perhaps implemented as hardware or is implemented as integrated circuit, such as specific integrated circuit.Such software can be with Distribution on a computer-readable medium, computer-readable medium may include computer storage medium (or non-transitory medium) and Communication media (or fugitive medium).As known to a person of ordinary skill in the art, term computer storage medium is included in use In any method or technique of storage information (such as computer readable instructions, data structure, program module or other data) The volatile and non-volatile of implementation, removable and nonremovable medium.
It should be noted that in the absence of conflict, the feature in the embodiment of the present invention and embodiment can be mutual Combination is to obtain new embodiment.
Although disclosed herein embodiment it is as above, the content only for ease of understanding the present invention and use Embodiment is not intended to limit the invention.Technical staff in any fields of the present invention is taken off not departing from the present invention Under the premise of the spirit and scope of dew, any modification and variation, but the present invention can be carried out in the form and details of implementation Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.

Claims (10)

1. a kind of Color Mapping Approach, comprising:
To the tristimulus signal value under one group of three primary colors, the chromaticity coordinates under its corresponding three primary colors is determined；
According to the chromaticity coordinates under the three primary colors and the first mapping relations are preset, determine the chromaticity coordinates under five primaries；
According to the chromaticity coordinates under predefined constraint condition and the five primaries, the tristimulus signal under the three primary colors is determined The multicolored signal value being worth under corresponding five primaries；Wherein, the predefined constraint condition includes: trichromatic under five primaries Signal value under signal value and three primary colors meets default second mapping relations, wherein the three primary colors under five primaries refer to and three originals Identical three primary colors under color.
2. Color Mapping Approach according to claim 1, which is characterized in that default first mapping relations are as follows:
Wherein, WP0 is point W and point P0Distance, WP1 is point W and point P1Distance, WA be point W and point A distance, WB be point W With the distance of point B, point W is the white point under three primary colors, point P0It is the corresponding point of chromaticity coordinates under three primary colors, point P1It is under five primaries The corresponding point of chromaticity coordinates, point A is point W and point P0Line and three primary colors gamut boundary intersection point, point B is point W and point P0Company The intersection point of line and five primaries gamut boundary.
3. Color Mapping Approach according to claim 1, which is characterized in that the trichromatic signal value under the five primaries Meeting default second mapping relations with the signal value under three primary colors includes:
R1:G1:B1=R0:G0:B0
Wherein, R1, G1, B1 are the trichromatic signal value under five primaries, and R0, G0, B0 are the signal value under three primary colors.
4. Color Mapping Approach according to any one of claims 1 to 3, which is characterized in that
The method also includes determining the tristimulus values under the corresponding three primary colors of tristimulus signal value under the three primary colors；
The predefined constraint condition further include: the chromaticity coordinates under tristimulus values and five primaries under five primaries, under three primary colors Tristimulus values meet default third mapping relations.
5. Color Mapping Approach according to claim 4, which is characterized in that the tristimulus values and five under the five primaries are former Tristimulus values under chromaticity coordinates, three primary colors under color meets default third mapping relations
Wherein, X1, Y1, Z1 are the tristimulus values under five primaries, and x1, y1, z1 are the chromaticity coordinates under five primaries, X0, Y0, Z0 tri- Tristimulus values under primary colors.
6. Color Mapping Approach according to claim 5, which is characterized in that it is described according to predefined constraint condition, with And the chromaticity coordinates under the five primaries, determine multicolored signal value under the corresponding five primaries of tristimulus signal value under the three primary colors Include:
According to the chromaticity coordinates under predefined constraint condition and the five primaries, five chrominance signal initial value R1, G1, B1 are determined, Ye1, C1；
Multicolored the signal value R, G, B, Ye, C under five primaries are determined according to the following formula:
Wherein, MAX5=max (R1, G1, B1, Ye1, C1),Y0 be three primary colors under tristimulus values (X0, Y0, Z0 the value of brightness is represented in), Ymax puts the maximum brightness that can be showed, the Ymax for the tristimulus signal value is corresponding are as follows:
Wherein, MAX3=max (R0, G0, B0), R0, G0, B0 are the signal value under three primary colors, YRYGYBFor display under three primary colors Tristimulus values.
7. Color Mapping Approach according to claim 6, which is characterized in that it is described according to predefined constraint condition, with And the chromaticity coordinates under the five primaries, determine that five chrominance signal initial value R1, G1, B1, Ye1, C1 include:
R1, Ye1, C1 are determined according to the following formula:
It is determined according to R1
Wherein,For the tristimulus values of display under five primaries, x1, y1, z1 are five primaries Under chromaticity coordinates, X0, Y0, Z0 be three primary colors under tristimulus values, R0, G0, B0 be the three primary colors under signal value.
8. a kind of color mapping device, which is characterized in that including memory and processor, the memory is stored with program, institute Program is stated when reading execution by the processor, realizes the Color Mapping Approach as described in claim 1 to 7 is any.
9. a kind of display equipment, which is characterized in that including color mapping device as claimed in claim 8.
10. a kind of medium, which is characterized in that be stored thereon with the computer program that can be run on a processor, the computer The step of Color Mapping Approach as described in any one of claims 1 to 7 is realized when program is executed by the processor.
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