CN101251994A - Chromatic correction method for setting target GAMMA curve of target display apparatus - Google Patents
Chromatic correction method for setting target GAMMA curve of target display apparatus Download PDFInfo
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Abstract
The invention relates to a color correction method, in which operations on color space conversion and chromaticity coordinate comparison are utilized to set target gamma curves of an object display device according to color characteristics of a reference display device. The color correction method disclosed in the invention is capable of measuring only white pictures with a variety of gray scales and setting target gamma curves of three primitive colors (red, green and blue) of the target display device by utilizing the operations on conversion of different color spaces and chromaticity coordinate comparison according to color characteristics of the reference display device, so the color characteristics of the target display device is virtually equal to the color characteristics of the reference display device. Therefore, the color correction method effectively reduces measurement data and time which are required to correct the color characteristics of the target display device.
Description
Technical field
What the present invention relates to is a kind of color correcting method, refers to especially a kind ofly utilize the operation of color space transformation and chromaticity coordinate comparison to set the color correcting method of the target gamma curve of an object display device according to the chromatic characteristic of a reference display device.
Background technology
As everyone knows, be used at present for example similarly is that the color correcting method of display device such as liquid crystal (LCD) display all is by adjusting the red green blue tricolor (R of display panels, G, B) gamma curve carries out colour correction, please refer to Fig. 1, Fig. 1 is existing R, G, the synoptic diagram of the gamma curve of B, as shown in Figure 1, the X-axis coordinate of the gamma curve that present industry is used always is 0 to 255 GTG input signal, the Y-axis coordinate then is 0 to 1023 GTG output signal, in other words, these gamma curves are that a kind of 8 (8-bit) input signals change the conversion of signals curve of 10 (10-bit) output signals.
Generally speaking, by adjusting the R of display panels, G, the classic method that the gamma curve of B carries out the colour correction of display panels mainly contains two kinds, first kind of traditional color correcting method is to utilize human eye to adjust the R that desire is proofreaied and correct a target display panels of color respectively according to its sensation and experience, G, the gamma curve of B, to proofread and correct the chromatic characteristic of described target display panels, but a large amount of manpowers of this method needs clearly and time, and be easy to produce error, will cause colour correction result's quality very unstable thus.
Second kind of traditional color correcting method then is respectively the GTG input signal of the red green blue tricolor on plural rank (for example 256 rank) to be inputed to the reference display panels that is used as a standard model (golden sample), with described with reference to display panels in output a plurality of reference patterns (referencepattern), then, utilize a colorimeter (colorimeter) to measure described a plurality of reference patterns and produce corresponding plural groups first chromaticity coordinate value, and then utilize the mode of trying mistake (trialand error) to change the R of described target display panels respectively at the CIE-xyY color space, G, the gamma curve of B produces plural groups second chromaticity coordinate value of approaching or described plural groups first chromaticity coordinate value that coexists mutually to try.Yet, because between each chromaticity coordinate value of CIE-xyY color space is linear dependence (lineardependent), so find out the R that meets described chromatic characteristic with reference to display panels in the mode of using tradition examination mistake, G, during the gamma curve of B, need a large amount of metric data and measure three kinds of colors of RGB (also promptly needing 256 * 1024 * 3 data) respectively, in other words, use this traditional color correcting method need spend the very tediously long time and just can finish the R of described target display panels, G, the adjustment of the gamma curve of B so that the chromatic characteristic of described target display panels in fact (substantially) equal described chromatic characteristic with reference to display panels.
Summary of the invention
In view of this, one of purpose of the present invention is to provide a kind of and utilizes the operation of color space transformation and chromaticity coordinate comparison to set the color correcting method of the target gamma curve of an object display device according to the chromatic characteristic of a reference display device, to effectively reduce the required metrology data and the time of chromatic characteristic of proofreading and correct described object display device.
According to claim of the present invention, it is to disclose a kind of color correcting method, be used in the target gamma curve of setting an object display device, described color correcting method includes: import a plurality of first input signals to a reference display device, with corresponding a plurality of first patterns (pattern) at described a plurality of first input signals of output in described reference display device; Measure described a plurality of first pattern respectively to produce plural groups first chromaticity coordinate value, described plural groups first chromaticity coordinate value is corresponding to one first color space; Set a plurality of gamma curves respectively and give described object display device, and import a plurality of second input signals to described object display device, with corresponding respectively a plurality of second patterns at described a plurality of gamma curves of output in described object display device, described a plurality of gamma curves are corresponding to one second color space; Measure described a plurality of second pattern respectively to produce plural groups second chromaticity coordinate value, described plural groups second chromaticity coordinate value is corresponding to described first color space; With described plural groups first chromaticity coordinate value and described plural groups second chromaticity coordinate value, be converted to plural groups the 3rd chromaticity coordinate value and plural groups the 4th chromaticity coordinate value respectively, wherein said plural groups the 3rd chromaticity coordinate value and described plural groups the 4th chromaticity coordinate value are all corresponding to described second color space; And described plural groups the 3rd chromaticity coordinate value and described plural groups the 4th chromaticity coordinate value compared, to produce corresponding at least one target gamma curve at described second color space.
Description of drawings
Fig. 1 is the synoptic diagram of the gamma curve of existing red green blue tricolor (R, G, B);
Fig. 2 is the synoptic diagram of an example of 256 group of the 3rd chromaticity coordinate value and 1024 group of the 4th chromaticity coordinate value;
Fig. 3 is the synoptic diagram of the target gamma curve of R, G, B;
Fig. 4 summarizes operation that the present invention utilizes the comparison of color space transformation and the chromaticity coordinate process flow diagram with first embodiment of the color correcting method of the target gamma curve of setting an object display device according to the chromatic characteristic of a reference display device according to above-mentioned function mode;
Fig. 5 is the synoptic diagram of an example of 10 group of the 3rd chromaticity coordinate value, 1024 group of the 4th chromaticity coordinate value and 10 group of the 6th chromaticity coordinate value;
Fig. 6 is the synoptic diagram of the target gamma curve of R, G, B;
Fig. 7 summarizes operation that the present invention utilizes the comparison of color space transformation and the chromaticity coordinate process flow diagram with second embodiment of the color correcting method of the target gamma curve of setting an object display device according to the chromatic characteristic of a reference display device according to above-mentioned function mode.
Description of reference numerals: 400～470,700～790-step.
Embodiment
In the middle of this instructions and claims, used some vocabulary to censure specific assembly.The person with usual knowledge in their respective areas should understand, and hardware manufacturer may be called same assembly with different nouns.This instructions and claims are not used as distinguishing the mode of assembly with the difference of title, but the criterion that is used as distinguishing with the difference of assembly on function, in addition, in the whole text in the middle of instructions and the follow-up request item carry and " including " be an open term, so should be construed to " include but be not limited to ".
The invention relates to and a kind ofly utilize the operation of color space transformation and chromaticity coordinate comparison to set the color correcting method of the target gamma curve of an object display device according to the chromatic characteristic of a reference display device, and this instructions will be described some about using the embodiment of method of the present invention, usually know that the knowledgeable should the described the present invention of recognizing can be applied in various types of display device but in correlative technology field, have, be not limited in the following description specific embodiment that is provided or the ad hoc approach of realizing the technical characterictic of these specific embodiments.
Generally speaking, the inventive method can be applied in the display device of any kind of, for instance, the inventive method can be applied in various display device such as cathode ray tube (CRT) display, liquid crystal (LCD) display, electricity slurry (PDP) display, polysilicon light emitting diode (PLED) display, Organic Light Emitting Diode (OLED) display or projector.Be to disclose a kind of method that is applied in the LCD in this manual, but this just is used in and illustrates, rather than restrictive condition of the present invention, in addition, do not influencing under the disclosed situation of the technology of the present invention, will utilize LCD that the principle of operation of the inventive method is described as an example in this instructions.
In one first embodiment, color correcting method of the present invention is respectively with the GTG input signal of the white picture on 256 known rank (256 GTG input signals that produced by a pattern generator (pattern generator) for example, and the X-axis coordinate of described 256 GTG input signals in the gamma curve is respectively known 0 to 255) input to as a standard model (golden sample) one with reference to LCD, with described with reference to LCD in 256 first patterns of GTG input signal of the corresponding white picture on described 256 rank of output, then, measure described a plurality of reference pattern and produce corresponding 256 group of first chromaticity coordinate value at a CIE-xyY color space, and then set 256 gamma curves respectively and give a target LCD, and described target LCD is arrived in the input GTG input signal of white picture arbitrarily, with corresponding respectively 256 second patterns of output in described target LCD at described 256 gamma curves, and described 256 gamma curves are corresponding to a CIE-RGB color space, each gamma curve is that the different inputs of definition are all corresponding to same output in wherein said 256 gamma curves, in other words, if transverse axis representative input GTG, longitudinal axis representative output GTG, each gamma slope of a curve is 0 in then described 256 gamma curves, then, measure described 256 second patterns respectively to produce 256 group of second chromaticity coordinate value, and described 256 group of second chromaticity coordinate value is corresponding to described CIE-xyY color space, and then described 256 group of first chromaticity coordinate value be converted to 256 group of the 3rd chromaticity coordinate value and described 256 group of second chromaticity coordinate value is converted to 256 groups of multicolored degree coordinate figures, wherein said 256 group of the 3rd chromaticity coordinate value and described 256 groups of multicolored degree coordinate figures are all corresponding to described CIE-RGB color space, then more described 256 multicolored degree coordinate figures of group are carried out linear interpolation to produce 1024 group of the 4th chromaticity coordinate value, just can compare then, to produce corresponding red green blue tricolor (R respectively at described CIE-RGB color space to described 256 group of the 3rd chromaticity coordinate value and described 1024 group of the 4th chromaticity coordinate value, G, B) target gamma curve.
For instance, please refer to Fig. 2, Fig. 2 is the synoptic diagram of an example of described 256 group of the 3rd chromaticity coordinate value and described 1024 group of the 4th chromaticity coordinate value.As shown in Figure 2, when being compared, described 256 group of the 3rd chromaticity coordinate value and described 1024 group of the 4th chromaticity coordinate value can find, because the R value on the 0th rank equals the R value on the 1st rank in described 1024 group of the 4th chromaticity coordinate value just in described 256 group of the 3rd chromaticity coordinate value, the first point coordinate value that therefore can obtain the target gamma curve of R is (0,1), and the R value on the 1st rank equals the R value on the 3rd rank in described 1024 group of the 4th chromaticity coordinate value just in described 256 group of the 3rd chromaticity coordinate value, the second point coordinate value that therefore can obtain the target gamma curve of R is (1,3), by that analogy, can run away with other corresponding relation, just can obtain the each point coordinate figure of the target gamma curve of R thus, and then the back target gamma curve that just can produce R that the each point coordinate figure is coupled together, in like manner, the target gamma curve of G and the target gamma curve of B also are to produce in the same way, as shown in Figure 3, therefore just can be according to resulting R, G, the target gamma curve of B is adjusted described target LCD so that the chromatic characteristic of described target LCD in fact (substantially) equal described chromatic characteristic with reference to LCD.Note that at this above only for illustrating, is not a restrictive condition of the present invention.
Please refer to Fig. 4, Fig. 4 summarizes operation that the present invention utilizes the comparison of color space transformation and the chromaticity coordinate process flow diagram with first embodiment of the color correcting method of the target gamma curve of setting an object display device according to the chromatic characteristic of a reference display device according to above-mentioned function mode.If can obtain identical result substantially, then the step in the flow process not necessarily needs to carry out according to order shown in Figure 4, and it is continuous also not necessarily needing, that is to say, and between these steps the step that can insert other.First embodiment of the inventive method includes the following step:
Step 400: beginning.
Step 410: import a plurality of first input signals to a reference display device, with corresponding a plurality of first patterns of output in described reference display device at described a plurality of first input signals.
Step 420: measure described a plurality of first pattern respectively to produce plural groups first chromaticity coordinate value, and described plural groups first chromaticity coordinate value is corresponding to one first color space, and wherein said first color space is to be the CIE-xyY color space of linear dependence (linear dependent) between each chromaticity coordinate value.
Step 430: set a plurality of gamma curves respectively and give described object display device, and import a plurality of second input signals to described object display device, with corresponding respectively a plurality of second patterns of output in described object display device at described a plurality of gamma curves, and described a plurality of gamma curve is corresponding to one second color space, and wherein said second color space is to be the linear independently CIE-RGB color space of (linear independent) between each chromaticity coordinate value.
Step 440: measure described a plurality of second pattern respectively with generation plural groups second chromaticity coordinate value, and described plural groups second chromaticity coordinate value is corresponding to described first color space.
Step 450: described plural groups first chromaticity coordinate value and described plural groups second chromaticity coordinate value are converted to plural groups the 3rd chromaticity coordinate value and plural groups the 4th chromaticity coordinate value respectively, and wherein said plural groups the 3rd chromaticity coordinate value is all corresponding to described second color space with described plural groups the 4th chromaticity coordinate value.
Step 460: described plural groups the 3rd chromaticity coordinate value and described plural groups the 4th chromaticity coordinate value are compared, to produce corresponding at least one target gamma curve at described second color space.
Step 470: finish.
In addition, please note at this, in other embodiments of the invention, measure described a plurality of second pattern and can also include following two steps: measure each second pattern to produce corresponding one with reference to chromaticity coordinate value with the step 440 that produces plural groups second chromaticity coordinate value; And a plurality ofly carry out linear interpolation to produce described plural groups second chromaticity coordinate value with reference to chromaticity coordinate value to described a plurality of second patterns are pairing; In addition, the step 450 that described plural groups first chromaticity coordinate value and described plural groups second chromaticity coordinate value is converted to described plural groups the 3rd chromaticity coordinate value and described plural groups the 4th chromaticity coordinate value respectively can also include following two steps: described plural groups first chromaticity coordinate value and described plural groups second chromaticity coordinate value are converted to multicolored degree coordinate figure of plural groups and plural groups the 6th chromaticity coordinate value respectively, and the multicolored degree coordinate figure of wherein said plural groups is corresponding to one the 3rd color space with described plural groups the 6th chromaticity coordinate value; And described multicolored degree coordinate figure of plural groups and described plural groups the 6th chromaticity coordinate value be converted to described plural groups the 3rd chromaticity coordinate value and described plural groups the 4th chromaticity coordinate value respectively, wherein said the 3rd color space is the CIE-XYZ color space.
In one second embodiment, color correcting method of the present invention is respectively with the GTG input signal of the white picture on 10 rank of the unknown (10 GTG input signals that produced by an optical digital disk player (DVD player) for example, and the X-axis coordinate of described 10 GTG input signals in the gamma curve is unknown) input to reference LCD as a standard model, with described with reference to LCD in 10 first patterns of GTG input signal of the corresponding white picture on described 10 rank of output, then, utilize colourity metering to survey described a plurality of reference patterns and produce corresponding 10 group of first chromaticity coordinate value at a CIE-xyY color space, and then set 32 gamma curves respectively and give a target LCD, and described target LCD is arrived in the input GTG input signal of white picture arbitrarily, with corresponding respectively 32 second patterns of output in described target LCD at described 32 gamma curves, and described 32 gamma curves are corresponding to a CIE-RGB color space, each gamma curve is that the different inputs of definition are all corresponding to same output in wherein said 32 gamma curves, in other words, if transverse axis representative input GTG, and longitudinal axis representative output GTG, each gamma slope of a curve is 0 in then described 32 gamma curves, then, measure described 32 second patterns respectively to produce 32 group of second chromaticity coordinate value, and described 32 group of second chromaticity coordinate value is corresponding to described CIE-xyY color space, and then the GTG input signal of white picture on 10 rank of importing above-mentioned the unknown equally is to described target LCD, in described target LCD, to export 10 three patterns of correspondence at the GTG input signal of the white picture on described 10 rank, then, measure described 10 the 3rd patterns to produce 10 groups of multicolored degree coordinate figures, and described 10 groups of multicolored degree coordinate figures are corresponding to described CIE-xyY color space, and then described 10 group of first chromaticity coordinate value be converted to 10 group of the 3rd chromaticity coordinate value, described 32 group of second chromaticity coordinate value is converted to 32 group of the 7th chromaticity coordinate value and described 10 groups of multicolored degree coordinate figures are converted to 10 group of the 6th chromaticity coordinate value, wherein said 10 group of the 3rd chromaticity coordinate value, described 32 group of the 7th chromaticity coordinate value and described 10 group of the 6th chromaticity coordinate value are all corresponding to described CIE-RGB color space, then more described 32 group of the 7th chromaticity coordinate value carried out linear interpolation to produce 1024 group of the 4th chromaticity coordinate value, just can compare then, to produce corresponding red green blue tricolor (R respectively at described CIE-RGB color space to described 10 group of the 3rd chromaticity coordinate value and described 1024 group of the 4th chromaticity coordinate value, G, B) target gamma curve.For instance, please refer to Fig. 5, Fig. 5 is the synoptic diagram of an example of described 10 group of the 3rd chromaticity coordinate value, described 1024 group of the 4th chromaticity coordinate value and described 10 group of the 6th chromaticity coordinate value.As shown in Figure 5, when being compared, described 10 group of the 3rd chromaticity coordinate value and described 1024 group of the 4th chromaticity coordinate value can find, because the R value on the 0th rank equals the R value on the 2nd rank in described 1024 group of the 4th chromaticity coordinate value just in described 10 group of the 3rd chromaticity coordinate value, first the Y-axis coordinate figure that therefore can obtain the target gamma curve of R is 2, and since in described 10 group of the 6th chromaticity coordinate value the R value on the 0th rank equal the R value on the 20th rank in described 1024 group of the 4th chromaticity coordinate value just, first the X-axis coordinate figure that therefore can obtain the target gamma curve of R is 5, and (slope when the conversion of signals curve that changes 10 (10-bit) output signals when 8 (8-bit) input signals is straight line equals 4, then above-mentioned X-axis coordinate figure promptly is to equal 20 divided by 4), be (5,2) so can obtain the first point coordinate value of the target gamma curve of R; Because the R value on the 1st rank equals the R value on the 12nd rank in described 1024 group of the 4th chromaticity coordinate value just in described 10 group of the 3rd chromaticity coordinate value, first the Y-axis coordinate figure that therefore can obtain the target gamma curve of R is 12, and since in described 10 group of the 6th chromaticity coordinate value the R value on the 1st rank equal the R value on the 32nd rank in described 1024 group of the 4th chromaticity coordinate value just, first the X-axis coordinate figure that therefore can obtain the target gamma curve of R is 8 (also promptly 32 divided by 4), so can obtain the second point coordinate value of the target gamma curve of R is (8,12), by that analogy, just can obtain the each point coordinate figure of the target gamma curve of R thus, and then the back target gamma curve that just can produce R that the each point coordinate figure is coupled together, in like manner, the target gamma curve of G and the target gamma curve of B also are to produce in the same way, as shown in Figure 6, therefore just can be according to resulting R, G, the target gamma curve of B is adjusted described target LCD, so that the chromatic characteristic of described target LCD equals described chromatic characteristic with reference to LCD in fact.Note that at this above only for illustrating, is not a restrictive condition of the present invention.
Please refer to Fig. 7, Fig. 7 summarizes operation that the present invention utilizes the comparison of color space transformation and the chromaticity coordinate process flow diagram with second embodiment of the color correcting method of the target gamma curve of setting an object display device according to the chromatic characteristic of a reference display device according to above-mentioned function mode.If can obtain identical result substantially, then the step in the flow process not necessarily needs to carry out according to order shown in Figure 7, and it is continuous also not necessarily needing, that is to say, and between these steps the step that can insert other.First embodiment of the inventive method includes the following step:
Step 700: beginning.
Step 710: import a plurality of first input signals to a reference display device, with corresponding a plurality of first patterns of output in described reference display device at described a plurality of first input signals.
Step 720: measure described a plurality of first pattern respectively to produce plural groups first chromaticity coordinate value, and described plural groups first chromaticity coordinate value is corresponding to one first color space, and wherein said first color space is to be the CIE-xyY color space of linear dependence (linear dependent) between each chromaticity coordinate value.
Step 730: set a plurality of gamma curves respectively and give described object display device, and import a plurality of second input signals to described object display device, with corresponding respectively a plurality of second patterns of output in described object display device at described a plurality of gamma curves, and described a plurality of gamma curve is corresponding to one second color space, and wherein said second color space is to be the linear independently CIE-RGB color space of (linear independent) between each chromaticity coordinate value.
Step 740: measure described a plurality of second pattern respectively with generation plural groups second chromaticity coordinate value, and described plural groups second chromaticity coordinate value is corresponding to described first color space.
Step 750: import described a plurality of first input signal to described object display device, with corresponding a plurality of the 3rd patterns of output in described object display device at described a plurality of first input signals.
Step 760: measure described a plurality of the 3rd pattern with the multicolored degree coordinate figure of generation plural groups, and the multicolored degree coordinate figure of described plural groups is corresponding to described first color space.
Step 770: with described plural groups first chromaticity coordinate value, described plural groups second chromaticity coordinate value and the multicolored degree coordinate figure of described plural groups, be converted to described plural groups the 3rd chromaticity coordinate value, described plural groups the 4th chromaticity coordinate value and described plural groups the 6th chromaticity coordinate value respectively, wherein said plural groups the 3rd chromaticity coordinate value, described plural groups the 4th chromaticity coordinate value and described plural groups the 6th chromaticity coordinate value are corresponding to described second color space.
Step 780: described plural groups the 3rd chromaticity coordinate value and described plural groups the 4th chromaticity coordinate value are compared, and described plural groups the 6th chromaticity coordinate value and described plural groups the 4th chromaticity coordinate value compared, to produce corresponding at least one target gamma curve at described second color space.
Step 790: finish.
In addition, please note at this, in other embodiments of the invention, measure described a plurality of second pattern and can also include following two steps: measure each second pattern to produce corresponding one with reference to chromaticity coordinate value with the step 440 that produces plural groups second chromaticity coordinate value; And a plurality ofly carry out linear interpolation with reference to chromaticity coordinate value to described a plurality of second patterns are pairing, to produce described plural groups second chromaticity coordinate value; In addition, with described plural groups first chromaticity coordinate value, described plural groups second chromaticity coordinate value and the multicolored degree coordinate figure of described plural groups, be converted to described plural groups the 3rd chromaticity coordinate value respectively, the step 770 of described plural groups the 4th chromaticity coordinate value and described plural groups the 6th chromaticity coordinate value can also include following two steps: with described plural groups first chromaticity coordinate value, described plural groups second chromaticity coordinate value and the multicolored degree coordinate figure of described plural groups, be converted to plural groups the 7th chromaticity coordinate value respectively, plural groups the 8th chromaticity coordinate value and plural groups the 9th chromaticity coordinate value, wherein said plural groups the 7th chromaticity coordinate value, described plural groups the 8th chromaticity coordinate value is corresponding to one the 3rd color space with described plural groups the 9th chromaticity coordinate value; And with described plural groups the 7th chromaticity coordinate value, described plural groups the 8th chromaticity coordinate value and described plural groups the 9th chromaticity coordinate value, be converted to described plural groups the 3rd chromaticity coordinate value, described plural groups the 4th chromaticity coordinate value and described plural groups the 6th chromaticity coordinate value respectively, wherein said the 3rd color space is the CIE-XYZ color space.
In sum, color correcting method disclosed in this invention is to utilize between each chromaticity coordinate value of CIE-RGB color space to be linearity characteristic independently, so color correcting method of the present invention can only measure the white picture of various different GTGs, and utilize the operation of color space transformation and chromaticity coordinate comparison, to set the R of an object display device according to the chromatic characteristic of a reference display device, G, the target gamma curve of B, so that the chromatic characteristic of described object display device equals the chromatic characteristic of described reference display device in fact, therefore color correcting method of the present invention can effectively reduce the required metrology data and the time of chromatic characteristic of proofreading and correct described object display device.
The above only is preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that claim of the present invention limited, revise, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (18)
1. color correcting method is used to set the target gamma curve of an object display device, and it is characterized in that: described color correcting method includes:
Import a plurality of first input signals to a reference display device, with corresponding a plurality of first patterns of output in described reference display device at described a plurality of first input signals;
Measure described a plurality of first pattern respectively to produce plural groups first chromaticity coordinate value, described plural groups first chromaticity coordinate value is corresponding to one first color space;
Set a plurality of gamma curves respectively and give described object display device, and import a plurality of second input signals to described object display device, with corresponding respectively a plurality of second patterns at described a plurality of gamma curves of output in described object display device, described a plurality of gamma curves are corresponding to one second color space;
Measure described a plurality of second pattern respectively to produce plural groups second chromaticity coordinate value, described plural groups second chromaticity coordinate value is corresponding to described first color space;
Described plural groups first chromaticity coordinate value and described plural groups second chromaticity coordinate value are converted to plural groups the 3rd chromaticity coordinate value and plural groups the 4th chromaticity coordinate value respectively, and wherein said plural groups the 3rd chromaticity coordinate value is all corresponding to described second color space with described plural groups the 4th chromaticity coordinate value; And
Described plural groups the 3rd chromaticity coordinate value and described plural groups the 4th chromaticity coordinate value are compared, to produce corresponding at least one target gamma curve at described second color space.
2. color correcting method according to claim 1 is characterized in that: be linear dependence between each chromaticity coordinate value of described first color space, and be linear independent between each chromaticity coordinate value of described second color space.
3. color correcting method according to claim 2 is characterized in that: described first color space is the CIE-xyY color space.
4. color correcting method according to claim 2 is characterized in that: described second color space is the CIE-RGB color space.
5. color correcting method according to claim 1, it is characterized in that: with described plural groups first chromaticity coordinate value and described plural groups second chromaticity coordinate value, be converted to described plural groups the 3rd chromaticity coordinate value respectively, also include with the step of described plural groups the 4th chromaticity coordinate value:
With described plural groups first chromaticity coordinate value and described plural groups second chromaticity coordinate value, be converted to the multicolored degree coordinate figure of plural groups respectively, with plural groups the 6th chromaticity coordinate value, the multicolored degree coordinate figure of wherein said plural groups is corresponding to one the 3rd color space with described plural groups the 6th chromaticity coordinate value; And
With the multicolored degree coordinate figure of described plural groups, with described plural groups the 6th chromaticity coordinate value, be converted to described plural groups the 3rd chromaticity coordinate value respectively, with described plural groups the 4th chromaticity coordinate value.
6. color correcting method according to claim 5 is characterized in that: described the 3rd color space is the CIE-XYZ color space.
7. color correcting method according to claim 1 is characterized in that: measure described a plurality of second pattern and also include with the step that produces plural groups second chromaticity coordinate value:
Measure each second pattern to produce corresponding one with reference to chromaticity coordinate value; And
Pairing a plurality of to described a plurality of second patterns with reference to chromaticity coordinate value, carry out linear interpolation to produce described plural groups second chromaticity coordinate value.
8. color correcting method according to claim 1 is characterized in that: the step that described plural groups second chromaticity coordinate value is converted to described plural groups the 4th chromaticity coordinate value also includes:
Described plural groups second chromaticity coordinate value is converted to the multicolored degree coordinate figure of plural groups; And
Described a plurality of groups of multicolored degree coordinate figures are carried out linear interpolation to produce described plural groups the 4th chromaticity coordinate value.
9. color correcting method according to claim 1 is characterized in that: each gamma curve is that the different inputs of definition are all corresponding to same output in described a plurality of gamma curves.
10. color correcting method according to claim 1 is characterized in that: also include:
Import described a plurality of first input signal to described object display device, with corresponding a plurality of the 3rd patterns of output in described object display device at described a plurality of first input signals;
Measure described a plurality of the 3rd pattern to produce the multicolored degree coordinate figure of plural groups, the multicolored degree coordinate figure of described plural groups is corresponding to described first color space; And
The multicolored degree coordinate figure of described plural groups is converted to plural groups the 6th chromaticity coordinate value, and wherein said plural groups the 6th chromaticity coordinate value is corresponding to described second color space; And
Producing correspondence includes in the step of at least one target gamma curve of described second color space:
Described plural groups the 3rd chromaticity coordinate value and described plural groups the 4th chromaticity coordinate value are compared, and described plural groups the 6th chromaticity coordinate value and described plural groups the 4th chromaticity coordinate value compared, to produce corresponding at least one target gamma curve at described second color space.
11. color correcting method according to claim 10 is characterized in that: be linear dependence between each chromaticity coordinate value of described first color space, and be linear independent between each chromaticity coordinate value of described second color space.
12. color correcting method according to claim 11 is characterized in that: described first color space is the CIE-xyY color space.
13. color correcting method according to claim 11 is characterized in that: described second color space is the CIE-RGB color space.
14. color correcting method according to claim 10, it is characterized in that: with described plural groups first chromaticity coordinate value, described plural groups second chromaticity coordinate value and the multicolored degree coordinate figure of described plural groups, the step that is converted to described plural groups the 3rd chromaticity coordinate value, described plural groups the 4th chromaticity coordinate value and described plural groups the 6th chromaticity coordinate value respectively includes:
With described plural groups first chromaticity coordinate value, described plural groups second chromaticity coordinate value and the multicolored degree coordinate figure of described plural groups, be converted to plural groups the 7th chromaticity coordinate value, plural groups the 8th chromaticity coordinate value and plural groups the 9th chromaticity coordinate value respectively, wherein said plural groups the 7th chromaticity coordinate value, described plural groups the 8th chromaticity coordinate value are corresponding to one the 3rd color space with described plural groups the 9th chromaticity coordinate value; And
With described plural groups the 7th chromaticity coordinate value, described plural groups the 8th chromaticity coordinate value and described plural groups the 9th chromaticity coordinate value, be converted to described plural groups the 3rd chromaticity coordinate value, described plural groups the 4th chromaticity coordinate value and described plural groups the 6th chromaticity coordinate value respectively.
15. color correcting method according to claim 14 is characterized in that: described the 3rd color space is the CIE-XYZ color space.
16. color correcting method according to claim 10 is characterized in that: measure described a plurality of second pattern and include to produce plural groups second chromaticity coordinate value:
Measure each second pattern to produce corresponding one with reference to chromaticity coordinate value; And
A plurality ofly carry out linear interpolation to described a plurality of second patterns are pairing, to produce described plural groups second chromaticity coordinate value with reference to chromaticity coordinate value.
17. color correcting method according to claim 10 is characterized in that: the step that described plural groups second chromaticity coordinate value is converted to described plural groups the 4th chromaticity coordinate value also includes:
Described plural groups second chromaticity coordinate value is converted to plural groups the 7th chromaticity coordinate value; And
Described a plurality of groups the 7th chromaticity coordinate values are carried out linear interpolation, to produce described plural groups the 4th chromaticity coordinate value.
18. color correcting method according to claim 10 is characterized in that: each gamma curve is that the different inputs of definition are all corresponding to same output in described a plurality of gamma curves.
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| CN101546548B (en) * | 2009-04-23 | 2010-12-08 | 北京德为视讯科技股份有限公司 | Composite lookup table method for synchronous correction of Gamma and chrominance of display |
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| CN111091789A (en) * | 2018-10-23 | 2020-05-01 | 纬联电子科技(中山)有限公司 | Display device and color correction method thereof |
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| CN114155817A (en) * | 2021-10-29 | 2022-03-08 | 江苏泽景汽车电子股份有限公司 | Color correction method of HUD display system |
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