CN103002193B - Digital image adjusting system and digital image adjusting method - Google Patents
Digital image adjusting system and digital image adjusting method Download PDFInfo
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- CN103002193B CN103002193B CN201210369955.5A CN201210369955A CN103002193B CN 103002193 B CN103002193 B CN 103002193B CN 201210369955 A CN201210369955 A CN 201210369955A CN 103002193 B CN103002193 B CN 103002193B
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Abstract
The invention relates to an image adjusting system. The image adjusting system comprises a color management unit and a second color adjusting unit, the color management unit is used for primary color adjustment for first digital images and capable of obtaining characteristic color patch files after primary color adjustment, and the second color adjusting unit comprises a key color testing label, a color comparison module, a color transformation module and an image generation module, wherein color values in the key color testing label are color values capable of correctly outputting typical colors in appointed output equipment after human eye judgment; the color comparison module is used for comparing the characteristic color patch files subjected to primary color adjustment with the color values of color blocks in the key color testing label one by one and computing color difference among the characteristic color patch files and the color values; the color transformation module is used for secondary color adjustment for the corresponding color values of the characteristic color patch files subjected to primary color adjustment when the color difference is within the specified threshold value range so that the characteristic color patch files subjected to secondary color adjustment are obtained, and secondary color adjustment refers to the color values of the corresponding color blocks in the key color testing label; and the image generation module is used for generating second digital images according to the characteristic color patch files subjected to secondary color adjustment.
Description
One, technical field
The invention belongs to image printing field, also can further for image display and/or the output of other media, as display, color jet-ink, heat sublimation printing, digital printing etc., the final result of the present invention makes image can be similar as far as possible on different output equipments.
Two, background technology
Due to the development of computer and network technologies, obtain, transmit, reproduce and the equipment of output digital image numerous, and these equipment belong to different manufacturers, have employed different technology, when reproducing same width digital picture, the recurrent vision effect difference of different equipment is very large, cause very large puzzlement to user, can not What You See Is What You Get be realized.
In order to realize the What You See Is What You Get between distinct device, main employing the following two kinds color adjustment method in prior art: one is the feature based on color of image itself, reading as isoparametric in grey level histogram and bearing calibration realize, this kind of mode ensures the reasonable layout of each passage of image at tint hierarchy, but can not process according to the reproduction of different equipment to color, therefore after being delivered to different equipment, the color of image still can change due to the limitation of equipment, cause the distortion of color, and misalignment is unpredictable; The second way carries out color management, on distinct device by with device-independent color space converting colors safely, although this mode take into account the ability of distinct device, different colours spatial reproduction color, but whole process is mainly by the quality of color management software, and artificially controlled factor is few.In other words, when using same color management software to change image, the ICC of generation is almost as broad as long, even if color of image is undesirable after using ICC, also method is not reasonably revised effectively.No matter but any image, color effects is all finally be judged as foundation with client or audience, and color management is only lack the amendment alternatively color being carried out to repetition, can not effectively ensure this process.
Known based on theoretical research formerly, for memory colour, (memory colour refers to the color be stored in long-range memory that human visual system obtains to the mankind, that is the object color of people's experience and understanding can find in memory), observation as the colour of skin, hair, fruit, plant, animal etc. is very responsive, in image, the aberration of memory colour often can more easily be found by people, makes us producing different chromatic stimulus impressions.Therefore for observer, the consistency of color rendering situation to image of memory colour has a very important role.
Such as US2004/0156244A1 discloses a kind of memory colour that adopts and image is exported to the mode regulated, first it calibrate digital picture, then extracted region is carried out to the image after calibration, adopt memory colour to calibrate for the background image after extracted region, obtain the digital picture after calibrating.What this adjustment mode ensure that memory colour hinders accurate reproduction at different output equipment.Although but the shortcoming of this calibrating mode is the order of accuarcy that can ensure memory colour region, still keep higher visual consistency when can not ensure that the overall visual effect of whole picture is changed between different devices.
WO2007/052485A1, JP2006-246376A also disclose the technical scheme that similar employing memory colour carries out calibrating, its shortcoming and US US2004/0156244A1 similar.
EP1089552A2 discloses and a kind ofly specifically how to adopt memory colour to carry out the method for digital picture calibration, and it describes the process that memory colour carries out digital picture calibration in detail.But its have with above-mentioned files classes like shortcoming.
As can be seen here, how between the equipment with different color gamut space and colour gamut reproduction effects, to keep relatively consistent visual effect, look after the color reproducibility of distinct device; Simultaneously allow again observer it seems and more press close to realistic colour, color original with things is in other words consistent, look after observer's aesthetical standard, being one has problem to be solved.
Three, summary of the invention
A kind of digital picture adjustment System that the present invention invents to solve the aforementioned problems in the prior just or method, this system or method improve the human eye vision consistency of color of image when carrying out color reproduction between different devices.
Specifically, the present invention adopts following technological means to solve the problems referred to above:
The invention provides a kind of Image Adjusting system, it comprises: color management unit, and this color management unit carries out first time color adjustment to the first digital picture, and can obtain the feature colour code file after first time color adjustment, second color adjusting unit, this second color adjusting unit comprises: key color test mark version, color data in this key color test mark version is the numerical value that correctly can export typical color in specified output device after human eye is passed judgment on, color comparison module, feature colour code file after this first time color adjustment and this key color are tested the color lump colour marked in version and are carried out comparison one by one by this color comparison module, calculate the aberration between them, color transformed module, when described aberration is within the threshold value specified, the adjustment of second time color is carried out to corresponding colour in the feature colour code file after described first time color adjustment, obtain the feature colour code file after the adjustment of second time color, this second time color adjustment is with reference to the colour of corresponding color lump in key color test mark version described in this, Computer image genration module, according to feature colour code file generated second digital picture after this second time color adjustment.
Invention further provides a kind of method using this system.
Present invention also offers a kind of image adjusting method, it comprises: color management step, and this color management step carries out first time color adjustment to step to the first digital picture, and can obtain the feature colour code file after first time adjustment, second color set-up procedure, this the second color set-up procedure comprises: provide key color to test mark version, color data in this key color test mark version is the numerical value that correctly can export typical color in specified output device after human eye is passed judgment on, color comparison step, feature colour code file after this first time color adjustment and this key color are tested the color lump colour marked in version and are carried out comparison one by one by this color comparison module, calculate the aberration between them, color transformed step, when described aberration is within the threshold value specified, the adjustment of second time color is carried out to corresponding colour in the feature colour code file after described first time adjustment, obtain the feature colour code file after second time adjustment, this second time color adjustment is with reference to the colour of corresponding color lump in this key color test mark version, Computer image genration step, according to feature colour code file generated second digital picture after this second time color adjustment.
Further, the feature colour code file after described first time adjustment is ICC file.
Further, in this system or method, described key color comprises memory colour and/or represents the color of assigned address in this designated equipment gamut boundary and/or this designated equipment colour gamut.Further, in this system or method, the numerical value of described aberration is Lab numerical value, XYZ numerical value, RGB numerical value or CMYK numerical value.
Further, in this system or method, described typical color is changed according to the difference of object of observation.Further, in this system or method, described typical color is different according to the content of the first digital picture and change.Further, in this system or method, the color in this ICC file and key color test mark version exports adjustment curve after comparing, and adopts this adjustment curve to carry out to adjust conversion described in digital picture according to output adjustment curve.Further, in this system or method, described adjustment curve is adjustable.It is pointed out that the control method by adopting above-mentioned personalization, the vision making the image exported more can meet human eye is passed judgment on, and has substantive distinguishing features outstanding further with significant progressive.
The present invention is by adopting above-mentioned technological means, the basis of existing color management overcomes the technical barrier that the two is not compatible mutually, add the correction based on human eye memory to image key color, ensure the colour gamut both considered when color conversion between distinct device, look after again the aesthetic method of observer, so both ensure that and color had been carried out and device-independent color space conversion, and met again the subjective aesthetical standard of people, achieve taking into account of subjectivity and objectivity.
Four, accompanying drawing explanation
Fig. 1 is the workflow diagram of color management in adjustment before tradition print
Fig. 2 is the working method schematic diagram adjusted image that works in the present invention
Fig. 3 is the fundamental diagram of system in the present invention or method
Five, embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is illustrated further, certain this explanation is only exemplary, those skilled in the art can adopt other technological means and mode to modify to the ins and outs in the present invention, improve or distortion, and obvious this change can not depart from invention of the present invention essence.
Fig. 1 is general digital image colors adjustment schematic diagram, wherein the first image is original image, in order to obtain good display effect on an output device, need to be adjusted by the color value of adjusting module to pixel multiple in the first image, thus obtain obtaining digital second image, this digital second image is suitable on specific equipment, and such as printer, printing machine, display, projecting apparatus etc. equipment, has good display effect.
Be more than traditional Image Adjusting mode, its pluses and minuses are illustrated in the introduction, and therefore not to repeat here.
Fig. 2 is the fundamental diagram of present system and method, wherein, original image also will be undertaken adjusting based on the key color of human eye vision by a key color adjusting module after the colorific adjustment of color management system, first key color adjusting module calls the ICC after color management, search memory colour wherein, the memory colour database of searching system, after difference between the memory colour determined in image and standard value, it is modified, generate the second image after new adjustment, the second image obtained after adjustment will be used for exporting on a particular device.
The specific works side of the key color adjusting module in the present invention is as follows:
First, the key color test mark version different according to different equipment choice, this key color test mark version is preferably a digital document, wherein have recorded a large amount of key color numerical value, these key colors are color data that display effect is best in particular device, and the test mark version content set by distinct device is different.Such as in certain a printing machine, the Lab value of sky color is set as (x, y, z) time the printed matter visual effect that prints be best, and in another printing machine the Lab value of sky color be set as (x ', y ', z ') time effect be then best, therefore distinct device needs the test mark version of different numerical value, but the content of these value points is all identical, the i.e. color of sky, namely wherein a kind of key color.
Then, numerical value in the L ' a ' b ' value of each color lump in the ICC file after carrying out color change by color management software and this test mark version is compared, when the aberration Δ E that the Lab value of a certain color lump B in version is marked in color data and the test of a certain color lump A in ICC file is in a certain scope, it is consistent for namely thinking that above-mentioned color lump A in ICC file and key color test the key color that the color lump B marked in version will represent.
the determination of Δ E can be known by inference based on known technology, include but are not limited to adopt statistics and the method that human eye vision tolerance analysis etc. are relevant.Now the key color numerical value of color lump A in this ICC file is revised as the numerical value of color lump B in key color test mark version, namely completes comparison and adjustment.After adjustment, the respective color in the digital picture in whole digital picture 1 after color management is all modified, the digital picture 7 after being adjusted.More preferred, adjustment curve can be exported after this ICC file and the key color test color marked in version are compared, adopt this adjustment curve to adjust digital picture, further, this adjustment curve is also adjustable, such adjustment gives prominence to some special key color further by the effect exported, and has more unforeseeable effect.This digital picture finally obtained is for exporting on a particular device.
Key color in key color test mark version 7 wherein preferably includes the test mark version of memory colour, its color data passes judgment on by standard observer color data best to this memory colour expressive force in this particular device obtained, such as meadow, sky, strawberry etc., after these color selecting, evaluated by a large amount of standard observers and find out the correct color reproduced, use relevant device to measure its Lab value, obtain Standard Colors value.
More preferred, should
key color includes memory colour and characteristic look, such as, represent the color of this designated equipment colour gamut inner boundary or specific position, these colors correctly may not show reference colour to feature on other equipment.Certain key color test mark version also can be or comprise the particular color numerical value after adopting other to pass judgment on based on human eye observation, further, can be that personalization is chosen according to different printing images, these settings all can substitute according to actual conditions, this makes it possible to obtain the personalised effects changed according to different observation colony, there is unforeseeable feature.
Because the color data in key color test mark version is through the color data after human eye judge, will more looks after the impression of human eye by the digital picture after using its adjustment after output, make it have more outstanding visual effect.So just ensure the colour gamut both considered when color conversion between distinct device, look after again the impression of observer, so both ensure that and color had been carried out and device-independent color space conversion, and can adjust according to the subjective aesthetical standard of people again, achieve the comprehensive utilization of subjectivity and objectivity.
Claims (8)
1. an Image Adjusting system, it comprises:
Color management unit, this color management unit carries out first time color adjustment to the first digital picture, and can obtain the feature colour code file after first time color adjustment, and the feature colour code file after described first time adjustment is ICC file;
Second color adjusting unit, this second color adjusting unit comprises:
Key color test mark version, the color data in this key color test mark version is the numerical value that correctly can export typical color in specified output device after human eye is passed judgment on,
Color comparison module, the feature colour code file after this first time color adjustment and this key color are tested the color lump colour marked in version and are carried out comparison one by one by this color comparison module, calculate the aberration between them,
Color transformed module, when described aberration is within the threshold value specified, the adjustment of second time color is carried out to corresponding colour in the feature colour code file after described first time color adjustment, obtain the feature colour code file after the adjustment of second time color, this second time color adjustment is with reference to the colour of corresponding color lump in key color test mark version described in this
Computer image genration module, according to feature colour code file generated second digital picture after this second time color adjustment.
2. Image Adjusting system as claimed in claim 1, it is characterized in that, described key color comprises memory colour and/or represents the color of assigned address in this designated equipment gamut boundary and/or this designated equipment colour gamut.
3. Image Adjusting system as claimed in claim 1, it is characterized in that, the numerical value of described aberration is Lab numerical value, XYZ numerical value, RGB numerical value or CMYK numerical value.
4. Image Adjusting system as claimed in claim 1, it is characterized in that, described typical color is changed according to the difference of object of observation.
5. Image Adjusting system as claimed in claim 1, is characterized in that, described typical color is different according to the content of the first digital picture and change.
6. Image Adjusting system as claimed in claim 1, it is characterized in that, color in this ICC file and key color test mark version exports adjustment curve after comparing, and adopts this adjustment curve to carry out to adjust conversion described in digital picture according to output adjustment curve.
7. Image Adjusting system according to claim 6, is characterized in that, described adjustment curve is adjustable.
8. an image adjusting method, it comprises:
Color management step, this color management step carries out first time color adjustment to step to the first digital picture, and can obtain the feature colour code file after first time adjustment, and the feature colour code file after described first time adjustment is ICC file;
Second color set-up procedure, this second color set-up procedure comprises:
There is provided key color to test mark version, the color data in this key color test mark version is the numerical value that correctly can export typical color in specified output device after human eye is passed judgment on;
Color comparison step, the feature colour code file after this first time color adjustment and this key color are tested the color lump colour marked in version and are carried out comparison one by one by this color comparison module, calculate the aberration between them;
Color transformed step, when described aberration is within the threshold value specified, the adjustment of second time color is carried out to corresponding colour in the feature colour code file after described first time adjustment, obtain the feature colour code file after second time adjustment, this second time color adjustment is with reference to the colour of corresponding color lump in this key color test mark version;
Computer image genration step, according to feature colour code file generated second digital picture after this second time color adjustment.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104139607B (en) * | 2014-08-04 | 2016-05-11 | 星光印刷（苏州）有限公司 | A kind of color management and printing machine bearing calibration |
| CN104943354B (en) * | 2015-07-13 | 2017-06-13 | 东莞当纳利印刷有限公司 | A kind of color management method and device of overlay film printed matter |
| CN105159627A (en) * | 2015-08-21 | 2015-12-16 | 杭州慕锐科技有限公司 | Method for automatically correcting digital printing chromatic aberration |
| CN105479960A (en) * | 2015-12-29 | 2016-04-13 | 杭州慕锐科技有限公司 | Digital printing method enabling on-screen-display color to be consistent with actual printing color |
| JP7057159B2 (en) * | 2018-03-02 | 2022-04-19 | キヤノン株式会社 | Image processing equipment, image processing methods and programs |
| CN109410193A (en) * | 2018-10-19 | 2019-03-01 | 深圳职业技术学院 | Print quality inspection picture structure and printed matter |
| CN113968088B (en) * | 2021-12-22 | 2022-03-11 | 杭州宏华数码科技股份有限公司 | Method, apparatus and storage medium for printing an object to be rendered |
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