CN1704891A - Computer color handling method and use thereof - Google Patents
Computer color handling method and use thereof Download PDFInfo
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- CN1704891A CN1704891A CN 200410044842 CN200410044842A CN1704891A CN 1704891 A CN1704891 A CN 1704891A CN 200410044842 CN200410044842 CN 200410044842 CN 200410044842 A CN200410044842 A CN 200410044842A CN 1704891 A CN1704891 A CN 1704891A
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Abstract
This invented method divides a color into two or more than two mono-colors C, M, Y, K... then simulates them with same numbers of mono-colors C1, M1, Y1, K1 and... , that is: C-C1, M-M1, Y-Y1, K-K1 and ... relating to a color process method from c, m, y, k... N dimension color spaces to these of C1,M1, Y1, K... N1, which are the actual used data after the hue correction, colors displayed by them can approach the original data C, M, Y, K... infinitely, the theory error tends to zero when approaching.
Description
Technical field
Technological processes such as a kind of brand-new computer color disposal route and the new color management, DATA REASONING and the calculating that form thus, printer colour correction, computer screen colour correction, the preceding digital sample printing of colored printing seal.
According to the computer software of this color processing method research and development drive on the EPSON PRO series wide format printer that Japanese Seiko Epson Corporation produces actual solved the printing industry seal before the color rendition problem of digital sample printing, use before comprising the insoluble real colour reduction of international ICC color management problem with can't solve or insoluble vital grey balance, double exposure, hollow out, problem such as trapping.
Background technology
At present, generally adopt ICC color management mode in the color process field, the principal character of this mode is to adopt following color conversion mode, and promptly CMYK or RGB → Lab → CMYK or RGB can use four kinds of modes such as relative value, absolute value, saturation degree, vision when conversion.The advantage of this method is: the software that utilizes this method establishment, can generate ICC input and output characteristic file quickly as tool software ColorBlind, GretagMacbeth, Kodak Colorflow etc., production run software BestColor, BestScreen, Labproof etc. can accept to carry out color management by the ICC input and output characteristic file that above-mentioned tool software generates, but shortcoming clearly, it needs repeatedly to adjust, just can obtain the color rendition precision about 90%, about 10% color is inaccurate in addition.Its second shortcoming is: same ICC input and output file, owing to can use four kinds of modes such as relative value, absolute value, saturation degree, vision, obtain color rendition to have nothing in common with each other, and there is not unified standard.Its 3rd shortcoming is: the CMYK technological process of production of generally using for printing, packing, printing and dyeing etc., because from the four-dimensional color space transformation of CMYK to the Lab three-dimensional color space and then be transformed into the four-dimensional color space of CMYK and have twice conversion, and each conversion all has error---be the errors of principles exists, so the color accuracy loss is bigger, accuracy is greatly affected, make the K version not black, C version, M version, Y version visual effect are impure, and be also inaccurate.Its 4th shortcoming is: because twice conversion by the Lab three-dimensional color space, lost double exposure, hollowed out and content such as trapping.
Summary of the invention
Problem to be solved by this invention is, adopts a kind of brand-new color management mode, i.e. C → C, and M → M, Y → Y, K → K ..., be that CMYK......N dimension color space is tieed up color space to CMYK......N.Owing to be direct conversion,, solved the relative relatively poor color rendition problem of autotype of ICC color management mode with the see-through plate accuracy so there is not transformed error.
Technical scheme of the present invention is:
With color be decomposed into two or more monochromatic C, M, Y, K ..., then, the monochromatic C of quantity such as also use
1, M
1, Y
1, K
1... simulate C, M, Y, K ..., i.e. C → C
1, M → M
1, Y → Y
1, K → K
1..., be C, M, Y, K ... N dimension color space is to C
1, M
1, Y
1, K
1... N
1The color processing method of dimension color space.C, M, Y, K...... are raw data, C
1, M
1, Y
1, K
1... be to proofread and correct the actual data of using in back through form and aspect, the actual in theory data C that uses
1, M
1, Y
1, K
1... the color that is presented (metamerism) can infinitely approach raw data C, M, Y, K......, and the errors of principles when approaching goes to zero.
In actual use because the breed difference of various media such as printing ink, paper (this difference exists when using ICC color management mode equally) makes the form and aspect and the theoretical value of actual output " thing " that deviation be arranged:
C
1≠C、M
1≠M、Y
1≠Y、K
1≠K......
Be C
1, M
1, Y
1, K
1... ≠ C, M, Y, K ...
For reaching:
C
1＝C、M
1＝M、Y
1＝Y、K
1＝K......
Be C
1, M
1, Y
1, K
1... .=C, M, Y, K ...
Therefore, must be to C
1, M
1, Y
1, K
1... carry out form and aspect and proofread and correct, detailed process is as follows: establish: 1, view data is represented (also can represent by the 0-255 form certainly) by the 0-100 form;
2, raw data is C, M, Y, K......, the actual data C that uses
1, M
1, Y
1, K
1....Then:
C
1＝C
21+M
21+Y
21+K
21+......
(be C promptly at a certain amount of C
21) the basis on add that an amount of M (is M
21) to add an amount of Y (be Y
21) to add an amount of K (be K
21) ..., with accurate simulation C.
M
1＝C
22+M
22+Y
22+K
22+......
(be M promptly at a certain amount of M
22) the basis on add that proper C (is C
22) to add an amount of Y (be Y
22) to add an amount of K (be K
22) ..., with accurate simulation M.
In like manner:
Y
1＝C
23+M
23+Y
23+K
23+......
K
1＝C
24+M
24+Y
24+K
24+......
......
Like this, it is as follows to have obtained one group of new data:
C
1＝{C
21，C
22，C
23，C
24，......}
M
1＝{M
21，M
22，M
23，M
24，......}
Y
1＝{Y
21，Y
22，Y
23，Y
24，......}
K
1＝{K
21，K
22，K
23，K
24，......}
......
Then, get:
C
1＝C
21+C
22+C
23+C
24+......
M
1＝M
21+M
22+M
23+M
24+......
Y
1＝Y
21+Y
22+Y
23+Y
24+......
K
1＝K
21+K
22+K
23+K
24+......
......
Press the 0-100 form as view data, work as C
1More than or equal to 100 o'clock, then get C
1=100;
Press the 0-255 form as view data, work as C
1More than or equal to 255 o'clock, then get C
1=255; The rest may be inferred by analogy for it.
With digital sample printing technological process before printing for for example: the form and aspect problem has solved, but the depth of color remove have with form and aspect outside the Pass, also relevant with the size and the density of site, promptly site, color depths is big, the density height, site, place of light color is little, density is low.At this moment, need proofread and correct the size and the density of site, concrete trimming process is as follows:
If one group of N look gradient image document, raw data is C, M, Y, K......, the 0-100 form, and 1% is an interval.Directly sending into output device (as printer etc.) prints, because the specimen page that printer is got also has aberration (comprising that the front has solved form and aspect problem, dot density and site size issue), at this moment, need only and test original text the first time that printing is obtained, measure with Spectrodensiotometer.100% real background color with printing chromatogram or original copy reference colored, promptly respectively with 100 C, 100 M, 100 Y, 100 K as 100 net numbers, measure corresponding gradient color lump, find out the color lump (perhaps not being 100 sites but can reaching the real background color of 100 site effects) of immediate 100 sites as the original text of drawing a design.Equally also can immediate L, a, the b value, mainly, check that as auxiliary site the accuracy rate of real background color is to verify its correctness based on the metering system of L value.With same method other color lump is carried out dot density test, can obtain with raw data be C, M, Y, K...... another class value, i.e. C one to one
3, M
3, Y
3, K
3... N group data value, to be used for the dot density data reduction of actual process flow process.
At last, first group of reality of statement form and aspect is used data C
1, M
1, Y
1, K
1... with second group of data C of statement dot density
3, M
3, Y
3, K
3... comprehensive, like this, just finished the overall process that the color of digital sample printing technology is handled before the seal.In use, also can handle dot density earlier, handle form and aspect again.
Advantage of the present invention is:
1, owing to tie up color space from CMYK......N dimension color space to CMYK......N, its color rendition precision can reach 100% in theory.Before seal, also obtained substantially exceeding the color rendition rate of ICC mode on the practice of digital sample printing technological process.Again owing to being N dimension color space, so can adapt to 3 print cartridges or 3 output units that color is above.
2, because direct " conversion " kept original " double exposure ", " hollowing out " and contents such as " trappings " in the digital sample printing technological process before seal.
3, to form and aspect and site or density adjustment, be respectively to C, M, Y, K ... adjust, only look version separately adjusted respectively, that is to say: can not relate to other look version when adjusting one of them look version, so easy to adjust, the accuracy rate height is convenient to computing machine and is optimized processing.
4, before the colour seal, solved the grey balance problem fully in the digital sample printing technological process.
Embodiment
The present invention is owing to related to the content of color management and these two aspects of dot density, this new method can be applied in the technological processes such as printer colour correction, computer screen colour correction, the preceding digital sample printing of seal, so describe its embodiment from the following aspects.
One, uses the preceding digital sample printing method of colour seal of new color processing method
Because the colored printing major part is a four-color process, so 4 dimensions (being C, M, Y, K) of only getting in the N dimension color are described for example, detailed process is as follows:
1, site or density correction: by to one group of 4 look cyan C, pinkish red M, yellow Y, the digital sample printing of black K gradient image document, measuring its site or density and printing chromatogram or reference colored compares, obtaining the gray scale respective value of C, M, Y, four look versions of K, (is C by the 4 groups of density correction data corresponding to cyan C, pinkish red M, yellow Y, black K that obtain
3, M
3, Y
3, K
3) proofing data is proofreaied and correct first;
2, form and aspect are proofreaied and correct: by the form and aspect data of the printer ink of actual measurement and the form and aspect data of printing-ink are compared, (be C with revised parameter
1, M
1, Y
1, K
1) directly be stored in the computing machine, as long as choose this parameter, it is revised data and loads automatically, the foundation of proofreading and correct as the form and aspect of ink in printing press prescription and printer ink;
3, will add from " site or density correction " and be delivered to " proofing data " that " form and aspect correction " obtains printer and print preceding digital sample printing.
Annotate: said method is equally applicable to digital sample printing before the polychrome seals such as double-colored, 5 looks, 6 looks, 7 looks;
Be equally applicable to different printer inks and different printing-inks;
The acquisition methods of these parameters has two kinds of 1. 2. actual measurement methods of empirical method (this method is a mature technology, so do not give unnecessary details);
This process is to come simulate press printing ink form and aspect with the printer ink form and aspect, to reach and the immediate effect of printed matter.
Optional technological process:
Mode 1, site or density correction---form and aspect correction---are drawn a design
Mode 2, form and aspect are proofreaied and correct---site or density correction---and are drawn a design
The suggestion flow process:
Because of 4 look dot gain rates of printing are not quite similar, the data that optional technological process mode 1 and mode 2 obtain can be slightly different, at first consider density because of mode 1 and proofread and correct mutually with the laggard circumstances in which people get things ready for a trip of dot gain rate, more press close on the principle; If former figure is the 1BIT image, the new color data of Chan Shenging then is such as pinkish red M, contain other three kinds of colors though proofread and correct the back, but all be distributed in same position, the data volume of other three kinds of colors is smaller usually, the new pinkish red M of formation, on visual effect, as pure pinkish red M, only be the difference of printing ink form and aspect, on the angle of printing: the distribution of ink dot also should be at same position, printing test has been verified above-mentioned viewpoint, and new cyan C, yellow Y, black K are roughly the same; And mode 2 can be carried out inconsistent adjustment to the data that the form and aspect calibration phase obtains because of the density correction stage that do not coexist of dot gain rate, though the dot gain rate difference of version of all kinds is little except that black print, but influenced the precision of the data that we obtain, so suggestion use-pattern 1.
Two, use new color processing method to computer screen colour correction flow process (the concise and to the point description)
Computer screen image CMYK format color is proofreaied and correct before being mainly used in seal at present.
1, the CMYK format-pattern is used new color processing mode, be mainly form and aspect and proofread and correct, ephemeral data---the C of new color management in the middle of obtaining
1M
1Y
1K
1Format-pattern;
2, by common C
1To R, M
1To G, Y
1To B, K
1Decompose the C of the mode of RGB according to a certain percentage with new color management
1M
1Y
1K
1Format-pattern is converted to the rgb format image that computer screen can normally show, to reach the computer screen image color correction.
Three, use new color processing method to printer colour correction flow process (the concise and to the point description)
The printer colour correction can be seen a kind of simplified way that prints preceding digital sample printing as.
Claims (5)
1, a kind of computer color disposal route and application thereof is characterized in that: with color be decomposed into two or more monochromatic C, M, Y, K ..., then, the monochromatic C of quantity such as also use
1, M
1, Y
1, K
1... simulate C, M, Y, K ..., promptly C-C
1, M-〉 M
1, Y-〉 Y
1, K-〉 K
1..., be C, M, Y, K ... N dimension color space is to C
1, M
1, Y
1, K
1... N
1The color processing method of dimension color space.C, M, Y, K...... are raw data, C
1, M
1, Y
1, K
1... be to proofread and correct the actual data of using in back through form and aspect, the actual in theory data C that uses
1, M
1, Y
1, K
1... the metamerism color that is presented, can infinitely approach raw data C, M, Y, K......, the errors of principles when approaching goes to zero.
Detailed process is as follows:
In actual use because the breed difference of various media such as printing ink, paper makes the form and aspect and the theoretical value of actual output " thing " that deviation be arranged:
C
1≠C、M
1≠M、Y
1≠Y、K
1≠K......
Be C
1, M
1, Y
1, K
1... ≠ C, M, Y, K ...
For reaching:
C
1＝C、M
1＝M、Y
1＝Y、K
1＝K......
Be C
1, M
1, Y
1, K
1...=C, M, Y, K ...
Therefore, must be to C
1, M
1, Y
1, K
1... carry out form and aspect and proofread and correct, detailed process is as follows:
If:
View data is represented by the 0-100 form, also can represent by the 0-255 form certainly;
Raw data is C, M, Y, K......, the actual data C that uses
1, M
1, Y
1, K
1....
Then:
C
1＝C
21+M
21+Y
21+K
21+......
Be C promptly at a certain amount of C
21The basis on add that an amount of M is M
21Adding an amount of Y is Y
21Adding an amount of K is K
21..., with accurate simulation C.
M
1＝C
22+M
22+Y
22+K
22+......
Be M promptly at a certain amount of M
22The basis on add that proper C is C
22Adding an amount of Y is Y
22Adding an amount of K is K
22..., with accurate simulation M.
In like manner:
Y
1＝C
23+M
23+Y
23+K
23+......
K
1＝C
24+M
24+Y
24+K
24+......
......
Like this, it is as follows to have obtained one group of new data:
C
1＝{C
21，C
22，C
23，C
24，......}
M
1＝{M
21，M
22，M
23，M
24，......}
Y
1＝{Y
21，Y
22，Y
23，Y
24，......}
K
1＝{K
21，K
22，K
23，K
24，......}
......
Then, get:
C
1＝C
21+C
22+C
23+C
24+......
M
1＝M
21+M
22+M
23+M
24+......
Y
1＝Y
21+Y
22+Y
23+Y
24+......
K
1＝K
21+K
22+K
23+K
24+......
......
Press the 0-100 form as view data, work as C
1More than or equal to 100 o'clock, then get C
1=100;
Press the 0-255 form as view data, work as C
1More than or equal to 255 o'clock, then get C
1=255; The rest may be inferred by analogy for it.
2, tie up the color processing method of color space according to the described N of claim " 1, ", can be applied in the preceding digital sample printing technological process of colored seal, because the colored printing major part is a four-color process, so 4 dimensions of only getting in the N dimension color are that C, M, Y, K describe for example.Specifically solve by the following method:
(1), site or density correction: by to one group of 4 look cyan C, pinkish red M, yellow Y, the digital sample printing of black K gradient image document, measuring its site or density and printing chromatogram or reference colored compares, obtaining the gray scale respective value of C, M, Y, four look versions of K, (is C by the 4 groups of density correction data corresponding to cyan C, pinkish red M, yellow Y, black K that obtain
3, M
3, Y
3, K
3) proofing data is proofreaied and correct first;
(2), form and aspect proofread and correct: by the form and aspect data of the printer ink of actual measurement and the form and aspect data of printing-ink are compared, (be C with revised parameter
1, M
1, Y
1, K
1) directly be stored in the computing machine, as long as choose this parameter, it is revised data and loads automatically, the foundation of proofreading and correct as the form and aspect of ink in printing press prescription and printer ink;
(3), will add from " site or density correction " and be delivered to " proofing data " that " form and aspect correction " obtains printer and print preceding digital sample printing.
(4), said method is equally applicable to digital sample printing before the polychrome seals such as double-colored, 5 looks, 6 looks, 7 looks; Be equally applicable to different printer inks and different printing-inks; The acquisition methods of these parameters has two kinds of 1. 2. actual measurement methods of empirical method (this method is a mature technology, so do not give unnecessary details); This process is to come simulate press printing ink form and aspect with the printer ink form and aspect, to reach and the immediate effect of printed matter.
3, according to the color processing method of the described N dimension of claim " 1, " color space, can be applied in the technological process of computer screen colour correction, specifically solve by the following method:
Computer screen image CMYK format color was proofreaied and correct before this method was mainly used in seal.
(1), the CMYK format-pattern is used new color processing mode, be mainly form and aspect and proofread and correct, ephemeral data---the C of new color management in the middle of obtaining
1M
1Y
1K
1Format-pattern;
(2), by common C
1To R, M
1To G, Y
1To B, K
1Decompose the C of the mode of RGB according to a certain percentage with new color management
1M
1Y
1K
1Format-pattern is converted to the rgb format image that computer screen can normally show, to reach the computer screen image color correction.
(3), aforementioned calculation machine screen color is proofreaied and correct and is equally applicable to RGB and CMY format-pattern.
4, according to the color processing method of the described N dimension of claim " 1, " color space, can be applied in the technological process of printer colour correction, specifically solve by the following method:
The printer colour correction can be seen a kind of simplified way that prints preceding digital sample printing as.
5, according to the color processing method of the described N dimension of claim " 1, " color space, get three-dimensional color space, can be applicable to industries such as wedding gauze kerchief digital photography, digital photograph flushing or printing, specifically solve by the following method:
(1), computer screen colour correction: be mainly RGB and CMY format-pattern, content is seen: claim " 3, ";
(2), digital photograph flushing colour correction: the color that is gone out the colour atla photo with the good sheet-punching machine of adjusted is that form and aspect correction and contrast correction are carried out in the basis;
(3), digital photo print colour correction: a kind of simplified way that can see the preceding digital sample printing of seal as.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410044842 CN1704891A (en) | 2004-05-31 | 2004-05-31 | Computer color handling method and use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410044842 CN1704891A (en) | 2004-05-31 | 2004-05-31 | Computer color handling method and use thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1704891A true CN1704891A (en) | 2005-12-07 |
Family
ID=35577174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410044842 Pending CN1704891A (en) | 2004-05-31 | 2004-05-31 | Computer color handling method and use thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1704891A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211475A (en) * | 2010-03-19 | 2011-10-12 | 精工爱普生株式会社 | Image processing method, image processing apparatus, and image processing program |
| CN102218901A (en) * | 2010-03-24 | 2011-10-19 | 海德堡印刷机械股份公司 | Gray balance correction of a printing process |
| CN104442058A (en) * | 2014-12-25 | 2015-03-25 | 深圳市安健科技有限公司 | Printing method and printing system for achieving consistent printing effect by use of inks in different batches |
| CN105620033A (en) * | 2016-03-24 | 2016-06-01 | 上海彩瑞油墨有限公司 | Intelligent water-based ink color blending working process |
| CN106569753A (en) * | 2016-10-31 | 2017-04-19 | 敬业（东莞）印刷包装厂有限公司 | Wide-gamut color management method, system and apparatus |
| CN108819492A (en) * | 2018-05-22 | 2018-11-16 | 中煤航测遥感集团有限公司 | Digital sample printing color correcting method and device before environment protecting paper process color color printing |
| CN111107336A (en) * | 2019-12-06 | 2020-05-05 | Oppo广东移动通信有限公司 | Image processing method, image processing device, electronic equipment and storage medium |
| CN113119447A (en) * | 2021-03-19 | 2021-07-16 | 西安理工大学 | Method for color space conversion of color 3D printing |
| CN113547846A (en) * | 2021-07-21 | 2021-10-26 | 深圳圣德京粤科技有限公司 | Simulated ink-jet printing method of starch food material |
-
2004
- 2004-05-31 CN CN 200410044842 patent/CN1704891A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211475A (en) * | 2010-03-19 | 2011-10-12 | 精工爱普生株式会社 | Image processing method, image processing apparatus, and image processing program |
| CN102218901A (en) * | 2010-03-24 | 2011-10-19 | 海德堡印刷机械股份公司 | Gray balance correction of a printing process |
| CN102218901B (en) * | 2010-03-24 | 2014-10-01 | 海德堡印刷机械股份公司 | Gray balance correction of a printing process |
| CN104442058B (en) * | 2014-12-25 | 2017-12-26 | 深圳市安健科技股份有限公司 | Make the consistent Method of printing of different batches ink printed effect and system |
| CN104442058A (en) * | 2014-12-25 | 2015-03-25 | 深圳市安健科技有限公司 | Printing method and printing system for achieving consistent printing effect by use of inks in different batches |
| CN105620033A (en) * | 2016-03-24 | 2016-06-01 | 上海彩瑞油墨有限公司 | Intelligent water-based ink color blending working process |
| CN106569753A (en) * | 2016-10-31 | 2017-04-19 | 敬业（东莞）印刷包装厂有限公司 | Wide-gamut color management method, system and apparatus |
| CN106569753B (en) * | 2016-10-31 | 2019-10-18 | 敬业（东莞）印刷包装厂有限公司 | A kind of wide colour gamut color management method, system and device |
| CN108819492A (en) * | 2018-05-22 | 2018-11-16 | 中煤航测遥感集团有限公司 | Digital sample printing color correcting method and device before environment protecting paper process color color printing |
| CN111107336A (en) * | 2019-12-06 | 2020-05-05 | Oppo广东移动通信有限公司 | Image processing method, image processing device, electronic equipment and storage medium |
| CN113119447A (en) * | 2021-03-19 | 2021-07-16 | 西安理工大学 | Method for color space conversion of color 3D printing |
| CN113547846A (en) * | 2021-07-21 | 2021-10-26 | 深圳圣德京粤科技有限公司 | Simulated ink-jet printing method of starch food material |
| CN113547846B (en) * | 2021-07-21 | 2022-09-09 | 深圳圣德京粤科技有限公司 | Simulated ink-jet printing method of starch food material |
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