CN1512787A - Method and device for regulating colour - Google Patents
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Abstract
This invention provides a method and a device for regulating colors used in regulating colors received by a system, resuming to regulate the said system to a first color preset value and the first color is expressed by a first coordinated value (X1,Y1) but this invention receives the second color first expressed by second coordinated value (X2,Y2), controlled by a first parameter Pb and a second parameter Pr, then to compare the two values to get a result, finally, regulate Pb and Pr separately according to the result till they are equal, thus, this invention regulates the second color to the first.
Description
Technical field
The present invention relates to adjust the method and apparatus of color, specifically, relate to and be used for the received color of Adjustment System.
Background technology
The color information of any image all can be by three primary colors red, green, blue (red, green, blue) composition.That is to say that each pixel in the image shows one of them or its combination of three kinds of colors of red, green, blue respectively.Like this, as long as each pixel of this image of taking a sample respectively just can further be formed the digital picture that three kinds of colors of a red, green, blue constitute.
And another kind of image processing mode promptly utilizes color difference signal (component signal) to come the color of each pixel in the represent images.Color difference signal is by Y, Pr, and signal combined for three kinds of Pb.Y promptly is a luminance signal, and Pr and Pb are colourity or chroma signals.
At this, color difference signal Y, Pr, Pb are exactly a kind of linear combination of three primary colors RGB in fact.Suppose that the available three primary colors RGB of all colors represents, just can be the reference axis of three primary colors RGB as color coordinate system.The reference axis of for example treating as color coordinate system with R-Y and B-Y.But,, then can significantly reduce needed amount of information when propagating if the selection of this reference axis cooperates the susceptibility of naked eyes to different color light again.Coming another consideration of document image with color difference signal is in order to save bandwidth.The sensitivity that people's eyes are more next than colour signal to luminance signal.In other words, utilize the characteristic of naked eyes,, just need to transmit three chrominance signals, and when transmitting the color of forming with color difference signal, then only need drawings in two color difference signals if transmit the color of forming with three primary colors RGB to color.
Yet, for digital image processing system, use color difference signal will produce can't the correcting image color problem.Because Pb and Pr signal can't change into 0 and 1 of numeral by simulation exactly, to such an extent as to often have error.Therefore, black appears to purplish grey on the contrary sometimes.
In order to address this problem, the utmost point needs a kind of method and apparatus that can adjust with color difference signal presentation video color.
Summary of the invention
For achieving the above object, the invention provides the method and apparatus that is used to adjust color, is to be applied to the received color of Adjustment System.At this, suppose to want to adjust this system's to the first color predetermined value.This first color is with first coordinate figure (X1, Y1) expression.The present invention is the coordinate figure of the color that receives by adjustment, makes it identical with first coordinate figure, so that the color that receives is adjusted into first color.
In adjustment color method of the present invention, at first import second color.At this, second color is with second coordinate figure (X2, Y2) expression and controlled by the first parameter Pb and the second parameter Pr.Then, compare X1 value and X2 value and Y1 value and Y2 value respectively, obtain a result.At last, the result according to relatively adjusts the first parameter Pb and the second parameter Pr respectively, till the X1 value equals X2 value and Y1 value and equals the Y2 value.
In adjustment color device of the present invention, comprise input unit, comparison means, adjusting device and judgment means.At first, utilize input unit to import second color.Then, compare X1 value and X2 value and Y1 value and Y2 value respectively by comparison means, to obtain a result.This result compares the magnitude relationship of X1 value and X2 value and Y1 value and Y2 value.At last, adjusting device is adjusted the first parameter Pb and the second parameter Pr respectively just according to this result, till the X1 value equals X2 value and Y1 value and equals the Y2 value.
Description of drawings
Fig. 1 shows an embodiment of adjustment color device of the present invention.
Fig. 2 shows the coordinate diagram of an embodiment of adjustment color device of the present invention.
Fig. 3 shows the flow chart of an embodiment of adjustment color of the present invention.
Fig. 4 shows the flow chart of an embodiment of adjustment color of the present invention.
Fig. 5 A-Fig. 5 D shows the schematic diagram of an embodiment of adjustment color of the present invention.
The figure number explanation
1 adjusts the color device
10 first colors
20 second colors
11 input units
13 comparison means
15 adjusting devices
17 judgment means
Embodiment
Fig. 1 shows an embodiment of adjustment color device of the present invention.Adjustment color device 1 of the present invention comprises input unit 11, comparison means 13, adjusting device 15 and judgment means 17.
In this embodiment, the present invention is applied to the second received color 20 of Adjustment System.Suppose to want to adjust this system's to the first color 10 predetermined values.As shown in Figure 2, this first color 10 is with first coordinate figure (X1, Y1) expression.And this second color 20 is with second coordinate figure (X2, Y2) expression and controlled by the first parameter Pb and the second parameter Pr.In addition, the control mode that the present invention controls second color 20 is: when improving the first parameter Pb, X2 value and Y2 value increase equivalent; When reducing by the first parameter Pb, X2 value and Y2 value reduce equivalent; When improving the second parameter Pr, X2 value and Y2 value equivalent respectively reduce and increase; When reducing by the second parameter Pr, X2 value and Y2 value equivalent respectively increase and reduce.In addition, in this embodiment, the represented coordinate of Fig. 2 is Commission Internationale De L'Eclairage (CIE) coordinate system.But the present invention is not subjected to any restriction of representing the coordinate representation method of color.
At first, the present invention utilizes input unit 11 inputs second color 20.Then, compare X1 value and X2 value and Y1 value and Y2 value respectively by comparison means 13, to obtain a result.This result deducts the X1 value by the X2 value respectively and obtains first value and deduct the Y1 value by the Y2 value obtaining second value, and relatively first value and this second value and obtain.That is to say that this result compares the magnitude relationship of X1 value and X2 value and Y1 value and Y2 value.At last, adjusting device 15 is adjusted the first parameter Pb and the second parameter Pr respectively just according to this result, till judgment means 17 judges that the X1 values equal X2 value and Y1 value and equal the Y2 value.That is to say that this moment, second coordinate figure was identical with first coordinate figure, therefore, the present invention just makes second color 20 be adjusted into first color 10.
In addition, understand, below adjustment color method of the present invention is described then in order to make the easier quilt of feature of the present invention.Simultaneously, the detailed method of adjustment of above-mentioned adjusting device of the present invention 15 also will be below at explanation together in the explanation of adjustment color method of the present invention.
Fig. 3 shows the flow chart of an embodiment of adjustment color method of the present invention.In this embodiment, the present invention is applied to the second received color of Adjustment System.At first hypothesis wants to adjust this system's to the first color predetermined value.This first color is with first coordinate figure (X1, Y1) expression.Adjustment color method of the present invention comprises step 31 to step 41.
At first, step 33 input second color.This second color is with second coordinate figure (X2, Y2) expression and controlled by the first parameter Pb and the second parameter Pr.In addition, the present invention supposes that further the control mode of following control second color 20 is: when improving the first parameter Pb, X2 value and Y2 value increase equivalent; When reducing by the first parameter Pb, X2 value and Y2 value reduce equivalent; When improving the second parameter Pr, X2 value and Y2 value equivalent respectively reduce and increase; When reducing by the second parameter Pr, X2 value and Y2 value equivalent respectively increase and reduce.
Then, step 35 respectively relatively first coordinate figure of first color and second color (X1, Y1) (X2 Y2), obtains a result with second coordinate figure.This result deducts the X1 value by the X2 value respectively and obtains first value and deduct the Y1 value by the Y2 value obtaining second value, and relatively first value and second value and obtain.That is to say that this result compares the magnitude relationship of X1 value and X2 value and Y1 value and Y2 value.
At this, step 37 of the present invention further comprises step 371 to step 379.Step 371 to step 377 is to be used for treatment step 35 resulting four kinds of different comparative results respectively.
When the result for the X2 value greater than X1 value and Y2 value under the situation greater than the Y1 value, just greater than zero the time, step 371 reduces by the first parameter Pb to first value, till any generation in first state and second state greater than zero and second value.At this, the first state representation X2 value is not more than the X1 value and the second state representation Y2 value is not more than the Y1 value.
When first state took place, just execution in step 3711.Half of the difference of step 3711 setting Y2 value and Y1 value is the Dy value.Then, the step 3713 continuous decrease first parameter Pb is till the difference of Y2 value and Y1 value is not more than the Dy value.
When second state took place, just execution in step 3715.Half of the difference of step 3715 setting X2 value and X1 value is the Dx value.Then, the step 3717 continuous decrease first parameter Pb is till the difference of X2 value and X1 value is not more than the Dx value.
When the result for the X2 value less than X1 value and Y2 value under the situation less than the Y1 value, step 373 increases by the first parameter Pb, till any generation in the third state and four condition.At this, the third state represents that the X2 value is not less than the X1 value and four condition represents that the Y2 value is not less than the Y1 value.
When the third state took place, just execution in step 3731.Half of the difference of step 3731 setting Y2 value and Y1 value is the Dy value.Then, step 3733 continues to increase the first parameter Pb, till the difference of Y2 value and Y1 value is not less than the Dy value.
When four condition took place, just execution in step 3735.Half of the difference of step 3735 setting X2 value and X1 value is the Dx value.Then, step 3737 continues to increase the first parameter Pb, till the difference of X2 value and X1 value is not less than the Dx value.
When the result for the X2 value greater than X1 value and Y2 value under the situation less than the Y1 value, step 375 increases by the second parameter Pr, till any generation in the 5th state and the 6th state.At this, the 5th state representation X2 value is not more than the X1 value and the 6th state representation Y2 value is not less than the Y1 value.
When the 5th state took place, just execution in step 3751.Half of the difference of step 3751 setting Y2 value and Y1 value is the Dy value.Then, step 3753 increases by the first parameter Pb, till the difference of Y2 value and Y1 value is not less than the Dy value.
When the 6th state took place, just execution in step 3755.Half of the difference of step 3755 setting X2 value and X1 value is the Dx value.Then, step 3757 reduces by the first parameter Pb, till the difference of X2 value and X1 value is not more than the Dx value.
When the result for the X2 value less than X1 value and Y2 value under the situation greater than the Y1 value, step 377 reduces by the second parameter Pr, till any generation in the 7th state and the 8th state.At this, the 7th state representation X2 value is not less than the X1 value and the 8th state representation Y2 value is not more than the Y1 value.
When the 7th state took place, just execution in step 3771.Half of the difference of step 3771 setting Y2 value and Y1 value is the Dy value.Then, step 3773 reduces by the first parameter Pb, till the difference of Y2 value and Y1 value is not less than the Dy value.
When the 8th state took place, just execution in step 3775.Half of the difference of step 3775 setting X2 value and X1 value is the Dx value.Then, step 3777 increases by the first parameter Pb, till the difference of X2 value and X1 value is not more than the Dx value.
At last, after carrying out above-mentioned step, step 379 is further adjusted the second parameter Pr again, so that the X1 value equals the X2 value and the Y1 value equals till the Y2 value.Like this, can make second coordinate figure and first coordinate figure identical, therefore, it is first color that the present invention just adjusts second color.
For instance, shown in Fig. 5 A, suppose that (X1 is that (X2 Y2) is (0.4,0.8) for (0.2,0.3) and second coordinate figure Y1) to first coordinate figure.Like this, resulting comparative result is the X2 value greater than X1 value and the Y2 value situation greater than the Y1 value.Therefore, the present invention will reduce by the first parameter Pb, till any in first state and second state takes place.At this, reduce by the first parameter Pb and represent that X2 value and Y2 value reduce equivalent.
Therefore, shown in Fig. 5 B, when the first parameter Pb reduced 0.2, just X2 value and Y2 value reduced simultaneously at 0.2 o'clock, and first state will take place.This first state representation X2 value is not more than the X1 value.Then, half of difference of setting out present Y2 value and Y1 value is the Dy value, and just the Dy value is 0.6 to deduct half of 0.3 value, is 0.15.Then, the continuous decrease first parameter Pb is till the difference of Y2 value and Y1 value is not more than the Dy value.
Shown in Fig. 5 C, last, the present invention will adjust the second parameter Pr and reduce 0.15, make X2 increase and the Y2 minimizing, till the X1 value equals X2 value and Y1 value and equals the Y2 value, shown in Fig. 5 D.Like this, can make second coordinate figure and first coordinate figure identical, therefore, it is first color that the present invention just adjusts second color.
It more than is the explanation of adjustment color method and apparatus of the present invention.And the present invention will can be applicable in any system, and for example the display system of computer peripheral equipment, TV, any visual device or the like are not done any restriction at this.
In the aforementioned specification, the present invention is that reference is described with the specific embodiment, yet obviously, various corrections and change do not break away from the spirit and the scope of broadness of the present invention.And explanation and diagram that should correspondence be to be illustrative rather than definitive thereof category of the present invention.Therefore, the expression the present invention should contain all appear at appended claim scope of the present invention equate with it the item correction and variation.
Claims (36)
1. a method of adjusting color is color to the first color predetermined value that is applied to Adjustment System, this first color be with first coordinate figure (X1, Y1) expression, this adjustment color method comprises following steps:
(1) input second color, this second color are that (X2 Y2) represents, and is controlled by the first parameter Pb and the second parameter Pr with second coordinate figure;
(2) relatively this X1 value and this X2 value and this Y1 value and this Y2 value respectively obtain a result;
(3), adjust this first parameter Pb and this second parameter Pr respectively according to this result; And
(4) judge whether this X1 value equals this X2 value and whether this Y1 value equals this Y2 value.
2. adjustment color method as claimed in claim 1, wherein, in this step (2), this result deducts this X1 value by this X2 value respectively to obtain first value, and deducts this Y1 value by this Y2 value and obtain second value, and relatively this first value and this second value and obtain.
3. adjustment color method as claimed in claim 2, wherein, in this result, when this first value and this second was worth each other jack per line, this step (3) further comprised following steps:
(3.1) adjust this first parameter Pb, be worth each other contrary sign or wherein any is zero up to this first value and this second.
4. adjustment color method as claimed in claim 3, wherein, when this result be this first value greater than zero and this second value when zero, this step (3.1) further comprises following steps:
(3.10) reduce this first parameter Pb, till any in first state and second state took place, wherein, this first value of this first state representation was not more than zero, and this second value of this second state representation is not more than zero.
5. adjustment color method as claimed in claim 4, wherein, this step (3.10) further comprises following steps:
(3.11) when this first state takes place, half of difference of setting this Y2 value and this Y1 value is the Dy value; And
(3.12) this first parameter of continuous decrease Pb is not more than this Dy value up to the difference of this Y2 value and this Y1 value.
6. adjustment color method as claimed in claim 4, wherein, this step (3.10) further comprises following steps:
(3.13) when this second state takes place, half of difference of setting this X2 value and this X1 value is the Dx value; And
(3.14) this first parameter of continuous decrease Pb is not more than this Dx value up to the difference of this X2 value and this X1 value.
7. adjustment color method as claimed in claim 3, wherein, when this result be this first value less than zero and this second value when zero, this step (3.1) further comprises following steps:
(3.20) increase this first parameter Pb, till any in the third state and four condition took place, wherein, this third state represented that this first value is not less than zero, and this four condition represents that this second value is not less than zero.
8. adjustment color method as claimed in claim 7, wherein, this step (3.20) further comprises following steps:
(3.21) when this third state takes place, half of difference of setting this Y2 value and this Y1 value is the Dy value; And
(3.22) continue to increase this first parameter Pb, not little up to the difference of this Y2 value and this Y1 value in this Dy value.
9. adjustment color method as claimed in claim 7, wherein, this step (3.20) further comprises following steps:
(3.23) when this four condition takes place, half of difference of setting this X2 value and this X1 value is the Dx value; And
(3.24) continue to increase this first parameter Pb, not little up to the difference of this X2 value and this X1 value in this Dx value.
10. adjustment color method as claimed in claim 2, wherein, in this result, when this first value and this second was worth each other contrary sign, this step (3) further comprised following steps:
(3.3) adjust this second parameter Pr, be worth each other jack per line or wherein any is zero up to this first value and this second.
11. adjustment color method as claimed in claim 10, wherein, when this result be this first value greater than zero and this second value when zero, this step (3.3) further comprises following steps:
(3.30) increase this second parameter Pr, till any in the 5th state and the 6th state took place, wherein, this first value of the 5th state representation was not more than zero, and this second value of the 6th state representation is not less than zero.
12. as claim 11 a described adjustment color method, wherein, this step (3.30) further comprises following steps:
(3.31) when the 5th state takes place, half of difference of setting this Y2 value and this Y1 value is the Dy value; And
(3.32) increase this first parameter Pb, not little up to the difference of this Y2 value and this Y1 value in this Dy value.
13. adjustment color method as claimed in claim 11, wherein, this step (3.30) further comprises following steps:
(3.33) when the 6th state takes place, half of difference of setting this X2 value and this X1 value is the Dx value; And
(3.34) reduce this first parameter Pb, be not more than this Dx value up to the difference of this X2 value and this X1 value.
14. adjustment color method as claimed in claim 10, wherein, when this result be this first value less than zero and this second value when zero, this step (3.3) further comprises following steps:
(3.40) reduce this second parameter Pr, till any in the 7th state and the 8th state took place, wherein this first value of the 7th state representation was not less than zero, and this second value of the 8th state representation is not more than zero.
15. as claim 14 a described adjustment color method, wherein, this step (3.40) further comprises following steps:
(3.41) when the 7th state takes place, half of difference of setting this Y2 value and this Y1 value is the Dy value; And
(3.42) reduce this first parameter Pb, not little up to the difference of this Y2 value and this Y1 value in this Dy value.
16. as claim 14 a described adjustment color method, wherein, this step (3.40) further comprises following steps:
(3.43) when the 8th state takes place, half of difference of setting this X2 value and this X1 value is the Dx value; And
(3.44) increase this first parameter Pb, be not more than this Dx value up to the difference of this X2 value and this X1 value.
17. adjustment color method as claimed in claim 1 wherein further comprises following steps between this step (3) and this step (4):
(3.5) adjust this second parameter Pr, till this X1 value equals this X2 value and this Y1 value and equals this Y2 value.
18. adjustment color method as claimed in claim 1, wherein, when improving this first parameter Pb, this X2 value and this Y2 value equivalent increase; When reducing this first parameter Pb, this X2 value and this Y2 value equivalent reduce.
19. adjustment color method as claimed in claim 1, wherein, when improving this second parameter Pr, this X2 value and this Y2 value equivalent respectively reduce and increase; When reducing this second parameter Pr, this X2 value and this Y2 value equivalent respectively increase and reduce.
20. adjust the color device for one kind, be color to the first color predetermined value that is applied to Adjustment System, this first color be with first coordinate figure (this adjustments color device is to comprise for X1, Y1) expression:
Input unit is used to import second color, and this second color is that (X2 Y2) represents, and is controlled by the first parameter Pb and the second parameter Pr with second coordinate figure;
Comparison means is used for respectively relatively this X1 value and this X2 value, and this Y1 value and this Y2 value, obtains a result;
Adjusting device according to this result, is adjusted this first parameter Pb and this second parameter Pr respectively; And
Judgment means is used to judge whether this X1 value equals this X2 value and whether this Y1 value equals this Y2 value.
21. adjustment color device as claimed in claim 20, wherein, this comparison means is to deduct this X1 value by this X2 value respectively to obtain first value, and deducts this Y1 value by this Y2 value and obtain second value, and relatively this first value and this second value and obtain this result.
22. adjustment color device as claimed in claim 21, wherein, in this result, when this first value and this second was worth each other jack per line, this adjusting device was adjusted this first parameter Pb, was worth each other contrary sign or wherein any is zero up to this first value and this second.
23. adjustment color device as claimed in claim 22, wherein, when this result be this first value greater than zero and this second value when zero, this adjusting device reduces this first parameter Pb, till in first state and second state any takes place, wherein, this first value of this first state representation is not more than zero, and this second value of this second state representation is not more than zero.
24. adjustment color device as claimed in claim 23, wherein, when this first state took place, half of difference that this adjusting device is further set this Y2 value and this Y1 value was the Dy value, this first parameter of continuous decrease Pb simultaneously is not more than this Dy value up to the difference of this Y2 value and this Y1 value.
25. adjustment color device as claimed in claim 23, wherein, when this second state took place, half of difference that this adjusting device is further set this X2 value and this X1 value was the Dx value, this first parameter of continuous decrease Pb simultaneously is not more than this Dx value up to the difference of this X2 value and this X1 value.
26. adjustment color device as claimed in claim 22, wherein, when this result be this first value less than zero and this second value when zero, this adjusting device increases this first parameter Pb, till in the third state and four condition any takes place, wherein this third state represents that this first value is not less than zero, and this four condition represents that this second value is not less than zero.
27. adjustment color device as claimed in claim 26, wherein, when deserving this third state when taking place, half of difference that this adjusting device is further set this Y2 value and this Y1 value is the Dy value, continue to increase this first parameter Pb simultaneously, not little up to the difference of this Y2 value and this Y1 value in this Dy value.
28. adjustment color device as claimed in claim 26, wherein, when this four condition took place, half of difference that this adjusting device is further set this X2 value and this X1 value was the Dx value, continue to increase this first parameter Pb simultaneously, not little up to the difference of this X2 value and this X1 value in this Dx value.
29. adjustment color device as claimed in claim 21, wherein, in this result, when this first value and this second was worth each other contrary sign, this adjusting device was adjusted this second parameter Pr, was worth each other jack per line or wherein any is zero up to this first value and this second.
30. adjustment color device as claimed in claim 29, wherein, when this result be this first value greater than zero and this second value when zero, this adjusting device increases this second parameter Pr, till in the 5th state and the 6th state any takes place, wherein, this first value of the 5th state representation is not more than zero, and this second value of the 6th state representation is not less than zero.
31. adjustment color device as claimed in claim 30, wherein, when the 5th state took place, half of difference that this adjusting device is further set this Y2 value and this Y1 value was the Dy value, increase this first parameter Pb simultaneously, not little up to the difference of this Y2 value and this Y1 value in this Dy value.
32. adjustment color device as claimed in claim 30, wherein, when the 6th state took place, half of difference that this adjusting device is further set this X2 value and this X1 value was the Dx value, reduce this first parameter Pb simultaneously, be not more than this Dx value up to the difference of this X2 value and this X1 value.
33. adjustment color device as claimed in claim 29, wherein, when this result be this first value less than zero and this second value when zero, this adjusting device reduces this second parameter Pr, till in the 7th state and the 8th state any takes place, wherein this first value of the 7th state representation is not less than zero, and this second value of the 8th state representation is not more than zero.
34. adjustment color device as claimed in claim 33, wherein, when the 7th state took place, half of difference that this adjusting device is further set this Y2 value and this Y1 value was the Dy value, reduce this first parameter Pb simultaneously, not little up to the difference of this Y2 value and this Y1 value in this Dy value.
35. adjustment color device as claimed in claim 33, wherein, when the 8th state took place, half of difference that this adjusting device is further set this X2 value and this X1 value was the Dx value, increase this first parameter Pb simultaneously, be not more than this Dx value up to the difference of this X2 value and this X1 value.
36. adjustment color device as claimed in claim 20, wherein, this adjusting device is further adjusted this second parameter Pr, till this judgment means judges that this X1 value equals this X2 value and this Y1 value and equals this Y2 value.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB021598339A CN1323557C (en) | 2002-12-27 | 2002-12-27 | Method and device for regulating colour |
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| CNB021598339A CN1323557C (en) | 2002-12-27 | 2002-12-27 | Method and device for regulating colour |
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| CN1512787A true CN1512787A (en) | 2004-07-14 |
| CN1323557C CN1323557C (en) | 2007-06-27 |
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| CN101466047B (en) * | 2007-12-21 | 2010-12-22 | 佛山普立华科技有限公司 | System and method for automatically correcting digital optical processing projector color |
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| JP3750830B2 (en) * | 1996-08-30 | 2006-03-01 | ソニー株式会社 | Color correction apparatus in imaging apparatus |
| JP2001034242A (en) * | 1999-07-26 | 2001-02-09 | Matsushita Electric Ind Co Ltd | Liquid crystal display device |
| JP2002010281A (en) * | 2000-06-19 | 2002-01-11 | Canon Inc | Image processing apparatus and its control method |
| JP3760117B2 (en) * | 2000-07-17 | 2006-03-29 | 松下電器産業株式会社 | Image signal processing apparatus, image display apparatus, multi-display apparatus, and chromaticity adjustment method in multi-display apparatus |
| JP4526167B2 (en) * | 2000-08-11 | 2010-08-18 | ローム株式会社 | Hue conversion method |
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