CN115179659B - Intelligent color correction method and system for color ink jet printing - Google Patents
Intelligent color correction method and system for color ink jet printing Download PDFInfo
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/21—Ink jet for multi-colour printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/07—Ink jet characterised by jet control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
- G06F3/1203—Improving or facilitating administration, e.g. print management
- G06F3/1208—Improving or facilitating administration, e.g. print management resulting in improved quality of the output result, e.g. print layout, colours, workflows, print preview
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
Abstract
The invention provides an intelligent color correction method and system for color ink jet printing, and relates to the technical field of artificial intelligence, wherein the method comprises the following steps: obtaining all qualification standards of a target jet printing object, carrying out multi-feature acquisition on the target jet printing object to obtain a target feature set, judging whether the current jet printing object is qualified or not according to all qualification standards of the jet printing object, carrying out color ink jet printing and data acquisition on the target jet printing object after determining that the target jet printing object meets all qualification standards to obtain dot gradation values of all channels, constructing an intelligent color correction model, and sequentially adjusting the dot gradation values of all channels through the intelligent color correction model to obtain a color correction result of the color ink jet printing of the target jet printing object. Solves the technical problems that the color correction process of the color ink jet printing in the prior art is complex and complicated, the color precision is difficult to ensure, and the quality of the color ink jet printing is unstable. The technical effects that color correction of color ink jet printing is separated from manual experience, color correction is accurate, rapid and efficient, and color accuracy of color ink jet printing obtained by color correction is high are achieved.
Description
Technical Field
The invention relates to the technical field of artificial intelligence, in particular to an intelligent color correction method and system for color ink jet printing.
Background
The color ink jet printing principle is that water-based or oil-based ink is jetted onto the surface of a target jet printing object in a form of dots, the dots are basic units for realizing preset color reproduction by color ink jet printing, and the jet printing effect of various colors can be realized by adjusting the dot percentage value of each color characteristic channel in the color ink jet printing device.
In actual color ink jet printing operations, the actual color ink jet printing results differ from the ideal jet printing color due to differences in the material properties of the target jet printing object receiving the color ink and the original appearance characterization. Usually, the color difference is eliminated, the color correction process is complicated and the color correction precision is not accurately ensured depending on the color correction experience of technicians.
In the prior art, color correction of color ink jet printing is limited by manual experience, the color correction process is complex and complicated, the color accuracy is difficult to ensure, and the technical problem of unstable color ink jet printing quality is caused.
Disclosure of Invention
The application provides an intelligent color correction method and system for color ink jet printing, which are used for solving the technical problems that color ink jet printing color correction is limited by manual experience, the color correction process is complex and complicated, the color precision is difficult to guarantee, and the production cost of color ink jet printing is high in the prior art.
In view of the above problems, the present application provides an intelligent color correction method and system for color ink jet printing.
In a first aspect of the present application, there is provided an intelligent color correction method for color ink jet printing, the method comprising: obtaining a qualification standard of a target jet printing object, wherein the qualification standard comprises a material qualification standard and an apparent qualification standard; performing multi-feature collection on the target jet printing object to obtain a target feature set; according to the target feature set, analyzing and judging whether the target jet printing object meets the material qualification standard and the apparent qualification standard; according to the judging result, if the target jet printing object meets the material qualification standard and the apparent qualification standard at the same time, performing color ink jet printing on the target jet printing object; acquiring data of color ink jet printing of the target jet printing object through a spectrodensimeter to obtain dot gradation values of all channels; constructing an intelligent color correction model by utilizing a halftone dot tone correction principle; and sequentially adjusting the dot gradation values of all the channels through the intelligent color correction model to obtain the color correction result of the color ink jet printing of the target jet printing object.
In a second aspect of the present application, there is provided an intelligent color correction system for color ink jet printing, the system comprising: the qualified standard obtaining module is used for obtaining qualified standards of the target jet printing object, wherein the qualified standards comprise material qualified standards and apparent qualified standards; the intelligent feature acquisition module is used for carrying out multi-feature acquisition on the target jet printing object to obtain a target feature set; the material qualification judging module is used for analyzing and judging whether the target jet printing object meets the material qualification standard and the apparent qualification standard according to the target feature set; the color ink jet printing execution module is used for carrying out color ink jet printing on the target jet printing object according to the judging result if the target jet printing object meets the material qualification standard and the apparent qualification standard at the same time; the spray printing data acquisition module is used for acquiring data of color ink spray printing of the target spray printing object through a spectrodensimeter to obtain dot gradation values of all channels; the color correction model construction module is used for constructing an intelligent color correction model by utilizing the halftone tone correction principle; and the color correction result output module is used for sequentially adjusting the dot gradation values of all the channels through the intelligent color correction model to obtain the color correction result of the color ink jet printing of the target jet printing object.
One or more technical solutions provided in the present application have at least the following technical effects or advantages:
according to the method provided by the embodiment of the application, the material qualification standard and the apparent qualification standard of the target jet printing object are obtained, so that a comparison basis is provided for subsequent comparison to determine whether the material and apparent attribute of the target jet printing object to be subjected to the color ink jet printing process meet the requirement of performing color ink jet printing. And carrying out multi-feature collection on a target jet printing object to be subjected to the color ink jet printing process at present to obtain a target feature set, analyzing and judging whether the target jet printing object meets the material qualification standard and the apparent qualification standard according to the target feature set, and carrying out color ink jet printing on the target jet printing object when the target jet printing object meets the material qualification standard and the apparent qualification standard at the same time, so as to avoid the jet printing effect difference caused by non-color factors. And acquiring data of the color ink jet printing of the target jet printing object through a spectrodensimeter to obtain dot gradation values of all channels, and providing a numerical basis for the subsequent color correction of the color ink jet pigment based on the dot gradation values of all channels. The intelligent color correction model is constructed by utilizing the dot tone correction principle, the dependence degree of the artificial experience in color ink correction is reduced, the dot tone values of all channels are sequentially adjusted by the intelligent color correction model, the color correction result of the color ink jet printing of the target jet printing object is obtained, the color correction of the color ink jet printing is separated from the artificial experience, the color correction is accurate, quick and efficient, and the color accuracy of the color ink jet printing obtained by the color correction is higher.
Drawings
Fig. 1 is a schematic flow chart of an intelligent color correction method for color ink jet printing;
FIG. 2 is a schematic flow chart of a method for intelligent color correction for color ink jet printing for collecting characteristics of a target jet printed matter;
FIG. 3 is a schematic flow chart of an intelligent color correction model constructed in an intelligent color correction method for color ink jet printing;
fig. 4 is a schematic structural diagram of an intelligent color correction system for color ink jet printing.
Reference numerals illustrate: the device comprises a qualification standard obtaining module 11, an intelligent characteristic collecting module 12, a material qualification judging module 13, a color ink jet printing executing module 14, a jet printing data collecting module 15, a color correction model constructing module 16 and a color correction result outputting module 17.
Detailed Description
The application provides an intelligent color correction method and system for color ink jet printing, which are used for solving the technical problems that color ink jet printing color correction is limited by manual experience, the color correction process is complex and complicated, the color precision is difficult to guarantee, and the production cost of color ink jet printing is high in the prior art.
Aiming at the technical problems, the technical scheme provided by the application has the following overall thought:
The method comprises the steps of setting a target jet printing object qualification standard, realizing the elimination of actual jet printing effect errors caused by external factors, carrying out dot gradation values of each color component characteristic channel based on the actual jet printing effect of the color ink, and obtaining a color correction result of the color ink jet printing through an intelligent color correction model so that the actual color effect of the color ink jet printing is consistent with a preset color effect. The technical effects that color correction of color ink jet printing is separated from manual experience, color correction is accurate, rapid and efficient, and color accuracy of color ink jet printing obtained by color correction is high are achieved.
Example 1
As shown in fig. 1, the present application provides an intelligent color correction method for color ink jet printing, the method comprising:
s100: obtaining a qualification standard of a target jet printing object, wherein the qualification standard comprises a material qualification standard and an apparent qualification standard;
specifically, the target jet printing object is a final attached object of color ink in the process of color ink jet printing, and along with the continuous development and optimization of jet printing technology, the standard of the target jet printing object is developed from a first flat and smooth horizontal plane to a three-dimensional structure object with radian variation allowed.
In order to avoid deviation between the color ink jet printing effect and the ideal color effect caused by material defects of the target jet printing object after the color ink jet printing is carried out on the target jet printing object, the qualification detection of the target jet printing object is required before the color ink jet printing is carried out formally.
The method for detecting the qualification of the target jet printing object is unified measurement and balance, unified detection qualification standards are established, and the target jet printing object to be subjected to color ink jet printing is subjected to the material qualification standards and apparent qualification standards meeting the color effect of preset color ink jet printing. The material qualification standard is the temperature and humidity requirements of the target jet printing object, and the apparent qualification standard is the smoothness requirement and the original color requirement of the contact surface of the target jet printing object and jet printing color ink.
And detecting the eligibility of a plurality of target jet printing objects based on the material eligibility standard and the apparent eligibility standard, so as to avoid the defect of color ink jet printing effect caused by the attribute of the jet printing objects.
S200: performing multi-feature collection on the target jet printing object to obtain a target feature set;
further, as shown in fig. 2, the method step S200 provided in the present application further includes:
s210: according to the material qualification standard, setting a temperature and humidity sensor to perform intelligent characteristic acquisition of temperature and humidity on the target jet printing object;
s220: according to the apparent qualification standard, a smoothness detector and an image acquisition device are sequentially arranged, and intelligent characteristic acquisition of surface smoothness and surface color is respectively carried out on the target spray printing object;
S230: an intelligent characteristic acquisition module is built according to the temperature and humidity sensor, the smoothness detector and the image acquisition device;
s240: and carrying out multi-feature collection on the target jet printing object through the intelligent feature collection module to obtain the target feature set.
In particular, it should be appreciated that the humidity of the target inkjet influences the ink color, and when the humidity exceeds the standard humidity requirement, the inkjet ink is diluted, resulting in reduced color saturation; and if the humidity is lower than the standard humidity requirement, performing color ink jet printing, and then, attaching the target disc jet printing object to oversaturate color.
The temperature of the target jet printing object influences the expressive force of the ink on the surface of the target jet printing object, the temperature of the target jet printing object does not meet the standard during jet printing, the performance state of the ink is changed, for example, the ductility of the ink is poor at low temperature, the color is concave-convex, the ductility of the ink is strong at high temperature, the jet printing ink is halated on the surface of the target jet printing object, and the jet printing effect is poor.
The surface smoothness of the target inkjet printing object influences the color presentation of the ink jet printing object, if the surface of the inkjet printing object is uneven, after the inkjet printing is performed, the color presentation effect of the color ink jet printing object is poor due to the light and shade change of the surface of the target inkjet printing object, and meanwhile, the primary color and magazine spots on the surface of the target inkjet printing object can also cause the expressive force of the color ink on the surface of the target inkjet printing object.
In this embodiment, in order to improve accuracy of the target jet printing object eligibility detection, the intelligent feature acquisition module is configured to perform eligibility detection of the target jet printing object, where the intelligent feature acquisition module is configured to include the temperature and humidity sensor, the smoothness detector and the image acquisition device.
And determining a material to-be-detected item according to the material qualification standard, and acquiring intelligent characteristics of temperature and humidity of the target jet printing object through the temperature and humidity sensor to obtain temperature and humidity data of the target jet printing object.
And determining an apparent project to be detected according to the apparent qualification standard, and respectively acquiring intelligent characteristics of the surface smoothness and the surface color of the target jet printing object through the smoothness detector and the image acquisition device to obtain surface smoothness and surface color condition data of the target jet printing object. And the temperature and humidity data, the surface smoothness and the surface color condition data of the target jet printing object form the target feature set.
According to the intelligent characteristic acquisition module, the temperature and humidity sensor, the smoothness detector and the image acquisition device are arranged, the intelligent characteristic acquisition module is used for detecting the qualification of the target jet printing object, manual detection experience is replaced, and the technical effect of improving the accuracy of the qualification detection of the target jet printing object is achieved.
S300: according to the target feature set, analyzing and judging whether the target jet printing object meets the material qualification standard and the apparent qualification standard;
s400: according to the judging result, if the target jet printing object meets the material qualification standard and the apparent qualification standard at the same time, performing color ink jet printing on the target jet printing object;
and (2) comparing the temperature and humidity data in the target feature set of the target jet printing object obtained in the step (200) with the material qualification standard, and considering that the target jet printing object meets the material qualification standard when the temperature and humidity data meet the jet printing temperature standard and the jet printing humidity standard of the material qualification standard.
And (2) comparing the surface smoothness and surface color condition data in the target feature set of the target jet printing object obtained in the step (200) with the apparent qualification standard, and considering that the target jet printing object meets the apparent qualification standard when the surface smoothness and surface color condition data meet the smoothness requirement and the original color requirement of the apparent qualification standard.
And when the target jet printing object meets the material qualification standard and the apparent qualification standard simultaneously, performing color ink jet printing on the target jet printing object. The embodiment realizes the elimination of color difference of the color ink jet printing caused by external factors by carrying out qualification requirements on the jet printing object of the color ink jet printing, and eliminates the interference influence of the multi-factor comprehensive effect for the subsequent color adjustment of the color ink.
S500: acquiring data of color ink jet printing of the target jet printing object through a spectrodensimeter to obtain dot gradation values of all channels;
specifically, it should be understood that the four-color printing mode is a color set mode adopted in color printing, and the three primary colors of the pigment are mixed and overlapped together by adding black ink to form "full-color printing". The four standard colors are: c cyan; m magenta; y is yellow; k black. CMYK four primary inks can form millions of colors in different dot area (percent) print combinations.
The channels are jet printing color forming features of color ink jet printing, and it is known that four primary color inks of CMYK can form millions of colors in different dot areas (percentages) by printing combinations, so in this embodiment, CMYK can be selected as a main channel, and jet printing color forming analysis can be performed in combination with other color channels. The channel dot gradation value is the area value of the primary color dot of the jet printing color in the color ink jet printing.
The spectral densimeter is color control equipment widely applied to plate making industry and printing industry, accurately measures a reflection spectrum curve of the target jet printing object after color ink jet printing during measurement, calculates to obtain tristimulus values through CIE colorimetry disorder based on the reflection spectrum curve, further obtains the density of CMYK four-color ink, and analyzes to obtain the dot gradation values of each channel on the surface of the current target jet printing object.
S600: constructing an intelligent color correction model by utilizing a halftone dot tone correction principle;
further, as shown in fig. 3, the method steps provided in the present application further include:
s610: constructing a test color block group, wherein the test color block group comprises a plurality of test color blocks;
s620: obtaining color data of each test color block in the plurality of test color blocks and taking the color data as data before jet printing;
s630: sequentially spray-printing the plurality of test color blocks to the target spray-printed object to obtain a spray-printing result, wherein the spray-printing result comprises the spray-printing result of each test color block in the plurality of test color blocks;
s640: performing density detection on the jet printing results of the test color blocks through a spectrodensitometer to obtain jet printing result data;
s650: and constructing the intelligent color correction model according to the pre-spray printing data and the spray printing result data.
Specifically, in this embodiment, the test color patch group including a plurality of test color patches is configured to obtain color data of each test color patch in the plurality of test color patches, where the color data includes a tone value of the color at each channel dot, and the tone value is used as pre-inkjet data to provide a comparison basis for performing color comparison with a representation color corresponding to the target inkjet object.
Sequentially spray-printing the plurality of test color blocks to the target spray-printed object to obtain spray-printing results of each test color block in the plurality of test color blocks; and carrying out density detection on the jet printing result of each test color block by using a spectrodensimeter to obtain jet printing result data, wherein the jet printing result data is the tone value of the color characterization of the test color on the target jet printing object in each channel dot. And constructing the intelligent color correction model according to the pre-spray printing data and the spray printing result data, and obtaining different test colors by adjusting the tone adjustment value of each channel dot based on the intelligent color correction model to obtain the color development of the test colors obtained by debugging after the simulation spray printing on the target spray printing object. The embodiment does not limit the construction method and the training method of the intelligent color correction model.
According to the embodiment, the intelligent color correction model is constructed by acquiring the color development data of different test colors on the target jet printing object, so that the technical effect of quickly acquiring the color development condition of different test colors on the target jet printing object without manual color mixing experience is achieved.
S700: and sequentially adjusting the dot gradation values of all the channels through the intelligent color correction model to obtain the color correction result of the color ink jet printing of the target jet printing object.
Specifically, in this embodiment, the optical density meter is used to collect data of the apparent color development condition of the target inkjet printing object, after obtaining the dot gradation values of each channel forming the current color development of the surface of the target inkjet printing object, the dot gradation values of the channel of the steel pipe are sequentially adjusted based on the intelligent color correction model, so as to obtain the color correction result of the color inkjet printing of the target inkjet printing object, and obtain the dot gradation values of each channel which enables the apparent color of the target inkjet printing object to have consistency with the planned inkjet printing color.
The method provided by the embodiment provides a comparison basis for determining whether the material and apparent attribute of the target jet printing object to be subjected to the color ink jet printing process meet the requirement of performing the color ink jet printing or not by obtaining the material qualification standard and the apparent qualification standard of the target jet printing object. And carrying out multi-feature collection on a target jet printing object to be subjected to the color ink jet printing process at present to obtain a target feature set, analyzing and judging whether the target jet printing object meets the material qualification standard and the apparent qualification standard according to the target feature set, and carrying out color ink jet printing on the target jet printing object when the target jet printing object meets the material qualification standard and the apparent qualification standard at the same time, so as to avoid the jet printing effect difference caused by non-color factors. And acquiring data of the color ink jet printing of the target jet printing object through a spectrodensimeter to obtain dot gradation values of all channels, and providing a numerical basis for the subsequent color correction of the color ink jet pigment based on the dot gradation values of all channels. The intelligent color correction model is constructed by utilizing the dot tone correction principle, the dependence degree of the artificial experience in color ink correction is reduced, the dot tone values of all channels are sequentially adjusted by the intelligent color correction model, the color correction result of the color ink jet printing of the target jet printing object is obtained, the color correction of the color ink jet printing is separated from the artificial experience, the color correction is accurate, quick and efficient, and the color accuracy of the color ink jet printing obtained by the color correction is higher.
Further, the method step S610 provided in the present application further includes:
s611: obtaining a plurality of color channels of a target color ink jet printing device;
s612: sequentially extracting to obtain a C channel, an M channel, a Y channel, a K channel, an O channel and an O channel in the plurality of color channels 1 A channel;
s613: based on the preset dot percentage, the C channel, the M channel, the Y channel, the K channel, the O channel and the O channel are sequentially processed 1 The channel carries out the tone design of the net points;
s614: and obtaining the plurality of test color blocks according to the halftone design result, and constructing the test color block group.
Specifically, in this embodiment, the channels are jet printing color forming features of the color ink jet printing, millions of colors can be formed by performing printing combination based on the primary color ink with different dot percentages, and the jet printing color ink colors can be changed by performing dot tone value adjustment on a plurality of color channels of the target color ink jet printing device. And (5) adjusting the tone value of the dot gradation of each color channel based on the preset dot percentage to obtain the preset test color block. The embodiment obtains the C channel, the M channel, the Y channel, the K channel, the O channel and the O channel of the plurality of color channels by obtaining the plurality of color channels of the target color ink jet printing equipment and sequentially extracting 1 A channel.
The method comprises the steps of presetting dot percentages of the dots of a plurality of channels corresponding to the test color blocks according to the test color blocks, and sequentially carrying out the steps of C channel, M channel, Y channel, K channel, O channel and O channel 1 And the channel performs halftone design, obtains the plurality of test color blocks according to halftone design results, and builds the test color block group based on the obtained plurality of test color blocks.
According to the embodiment, the dot percentage control is carried out on the color channels of the target color ink jet printing device, so that the test color blocks with the dot gradation values of a plurality of known color channels are obtained, a comparison basis is provided for the subsequent acquisition of the real color development condition of the test color blocks jet printed on the target jet printing object, the degree of difference between the test color blocks and the real color development of the test color blocks on the target jet printing object is accurately known, the jet printing color is rapidly analyzed and adjusted, and the technical effect that the real color development of the jet printing has consistency with the preset color development effect is achieved.
Further, the method step S650 provided herein further includes:
s651: extracting any one test color block of the plurality of test color blocks, and respectively obtaining data before spray printing of the test color block and spray printing result data of the test color block;
S652: based on the data before the spray printing of the test color block, obtaining the tone value of each channel dot tone of the test color block under the ICC characteristic file state;
s653: obtaining the dot gradation value of each channel of the test color block to be calibrated based on the test color block jet printing result data;
s654: and taking the tone value of each channel of the test color block in the ICC characteristic file state as a color correction reference, and performing color correction on the tone value of each channel of the test color block to be color-corrected, wherein a specific color correction formula is as follows:
D i ′＝D Oi +(D i -D Oi )*a
wherein the D is Oi Refers to the tone value of each channel dot of the test color block in the ICC profile state, the D i Refers to the tone value of the dot gradation of each channel of the test color block to be calibrated, the D i ' refers to the tone adjustment value of each channel dot of the test color block after color correction, a refers to the color correction parameter, and a is more than or equal to 0 and less than or equal to 1;
s655: and obtaining the intelligent color correction model according to the color correction formula.
In particular, the ICC profile is a data set for describing characteristics of a color input, output device or a certain color space, which is widely used for color management, achieving consistency of colors between devices and documents, or simulating color expression of documents on a target device on other devices.
The specific method for obtaining the intelligent color correction model is not limited in this embodiment, and preferably, the intelligent color correction model is constructed by a color correction formula. The embodiment selects the plurality of test colorsAny one test color block in the block respectively obtains pre-spray printing data of the test color block and spray printing result data of the test color block, wherein the pre-spray printing data of the test color block and the post-spray printing data of the test color block comprise C channels, M channels, Y channels, K channels, O channels and O channels 1 The channel dot tone value data corresponds one by one.
Based on the data before the spray printing of the test color block, obtaining the tone value of each channel dot tone of the test color block under the ICC characteristic file state; based on the test color block jet printing result data, obtaining the dot gradation value of each channel of the test color block to be calibrated, and taking the dot gradation value of each channel of the test color block in the ICC characteristic file state as a color calibration standard, and calibrating the dot gradation value of each channel of the test color block to be calibrated, wherein a specific color calibration formula is as follows:
D i ′＝D Oi +(D i -D Oi )*a
wherein the D is Oi Refers to the tone value of each channel dot of the test color block in the ICC profile state, the D i Refers to the tone value of the dot gradation of each channel of the test color block to be calibrated, the D i ' refers to the tone value of each channel dot of the test color block after color correction, and a refers to the color correction parameter, and a is more than or equal to 0 and less than or equal to 1.
And calculating the dot gradation value of each channel of the test color block in the ICC characteristic file state based on the color correction parameters and the data sets before and after the spray printing of the test color block according to the color correction formula, and constructing and training the intelligent color correction model based on the calculation result and the data sets before and after the spray printing of the test color block. Based on the color correction model, the tone value of each channel dot tone constituting the jet printing color ink can be obtained by inputting a preset target jet printing effect to develop.
According to the embodiment, the color correction formula and the color correction parameters are obtained by analyzing the pre-spray printing data of the test color block and the spray printing result data of the test color block, so that the technical effect of providing an accurate data basis for the follow-up construction of the intelligent color correction model is achieved.
Further, before the intelligent color correction model is obtained according to the color correction formula, the method steps provided in the application further include:
s810: extracting any halftone of any channel as a test sample, wherein the test sample is used for obtaining the color correction parameters through test calculation;
S820: obtaining a halftone dot tone value of the test sample in an ICC profile state;
s830: sampling and constructing a test sample jet printing result set, wherein the test sample jet printing result set comprises a plurality of jet printing results;
s850: sequentially detecting and obtaining dot tone values of the plurality of jet printing results, and calculating to obtain a dot tone average value of the jet printing results;
s860: determining a plurality of color correction parameter values by using a dichotomy, and calculating a plurality of dot color correction values of the test sample by combining the dot tone value of the test sample in the ICC characteristic file state and the dot tone average value of the jet printing result;
s870: and sequentially correcting the colors of the test sample by utilizing the plurality of dot correction values, and comparing and analyzing each color correction result to determine the color correction parameters.
Specifically, in this embodiment, any halftone level of any channel is extracted as a test sample, and the halftone level adjustment color parameter is obtained based on test calculation, so as to obtain halftone level adjustment values of each primary color channel under the ICC profile state of the test sample.
And sampling and constructing a test sample spray printing result set, wherein the test sample spray printing result set comprises a plurality of spray printing results, sequentially detecting and obtaining the spray printing results through the spectrodensitometer to obtain the dot tone values of all channels of the spray printing results, and calculating to obtain the dot tone average value of the spray printing results.
In this embodiment, the determination of the optimal correction parameter value is performed by a dichotomy, specifically, a plurality of correction parameter values are determined by a dichotomy, 1/2 is taken as the center point, and then a is taken as 0,1/2, 1/4,3/4,1/8,7/8, etc. respectively. And according to the dot percentage measurement value of the test color card, combining the dot tone value of the test sample in the ICC characteristic file state and the dot tone average value of the jet printing result, calculating by using the color correction formula in the step S654, calculating to obtain a plurality of dot correction values of the test sample, sequentially correcting the test sample by using the plurality of dot correction values, comparing and analyzing each color correction result, and determining the color correction parameters.
According to the embodiment, the calculation of the color correction parameters is carried out by randomly acquiring the halftone dot gradation of any channel, and the comparison and analysis of the color correction results are carried out by combining the halftone dot correction values obtained by the dichotomy, so that the technical effects of obtaining accurate color correction parameters and providing accurate data for constructing a color correction formula and an intelligent color correction model are achieved.
Further, the step S870 of determining the color correction parameter by sequentially correcting the colors of the test sample by using the plurality of dot color correction values and comparing and analyzing each color correction result further includes:
S871: based on the plurality of dot correction values, sequentially correcting the output value of the test sample by utilizing photo shop software to obtain a plurality of correction outputs;
s872: based on the correction outputs, sequentially performing jet printing by using target color ink jet printing equipment to obtain a plurality of jet printing results;
s873: sequentially detecting the spray printing results by using a spectrodensitometer to obtain a plurality of spray printing result data;
s874: sequentially comparing the multiple jet printing result data with the dot tone values of the test sample in the ICC profile state to obtain multiple difference values;
s875: and screening jet printing result data with the minimum difference value from the plurality of difference values, reversely matching the corresponding dot correction value, and taking the dot correction value as the color correction parameter.
Specifically, the photo shop software is an image editing program, and can perform color correction and functional color effect production. In this embodiment, based on the plurality of dot correction values, the output value correction is performed on the test sample by sequentially using the color correction function of the photo shop software, so as to obtain a plurality of correction outputs.
And based on the multiple correction output results, sequentially performing jet printing through the target color ink jet printing equipment to obtain multiple jet printing results, sequentially detecting the multiple jet printing results by using the spectrodensitometer to obtain multiple jet printing result data, wherein the jet printing result data comprises dot gradation values of each color characteristic channel, sequentially comparing the multiple jet printing result data with the dot gradation values of the test sample in the ICC characteristic file state to respectively obtain multiple difference values, screening jet printing result data with the minimum difference value in the multiple difference values, and comparing the difference value between the actual jet printing and the reference, wherein the smaller the difference value is, the better the color correction parameter is, and the higher the color correction precision is. And reversely matching the corresponding dot correction value according to the jet printing result data with the minimum difference value, and taking the dot correction value as the optimal correction parameter to be brought into the correction formula.
According to the embodiment, through color correction parameter optimization, the color correction parameter with better color correction precision is obtained and used as a component part of the color correction formula, so that the technical effect of obtaining the color correction formula with higher color correction fitting degree with the current target jet printing object is achieved, and the technical effect of improving the similarity of the color ink jet printing effect and the ideal jet printing effect is indirectly achieved.
Example two
Based on the same inventive concept as one of the intelligent color correction methods for color ink jet printing in the foregoing embodiments, as shown in fig. 4, the present application provides an intelligent color correction system for color ink jet printing, wherein the system includes:
a pass standard obtaining module 11, configured to obtain a pass standard of a target jet printing object, where the pass standard includes a material pass standard and an apparent pass standard;
the intelligent feature acquisition module 12 is used for carrying out multi-feature acquisition on the target jet printing object to obtain a target feature set;
a material qualification judging module 13, configured to analyze and judge whether the target jet printing object meets the material qualification standard and the apparent qualification standard according to the target feature set;
the color ink jet printing execution module 14 is used for performing color ink jet printing on the target jet printing object if the target jet printing object meets the material qualification standard and the apparent qualification standard at the same time according to the judging result;
The jet printing data acquisition module 15 is used for acquiring data of color ink jet printing of the target jet printing object through a spectrodensitometer to obtain dot gradation values of each channel;
the color correction model construction module 16 is used for constructing an intelligent color correction model by utilizing the halftone correction principle;
and the color correction result output module 17 is used for sequentially adjusting the dot gradation values of all the channels through the intelligent color correction model to obtain the color correction result of the color ink jet printing of the target jet printing object.
Further, the intelligent feature collection module 12 further includes:
the temperature and humidity acquisition unit is used for setting a temperature and humidity sensor to perform intelligent characteristic acquisition of temperature and humidity on the target jet printing object according to the material qualification standard;
the apparent characteristic acquisition unit is used for sequentially arranging a smoothness detector and an image acquisition device according to the apparent qualification standard and respectively carrying out intelligent characteristic acquisition of surface smoothness and surface color on the target jet printing object;
the acquisition device component unit is used for constructing an intelligent characteristic acquisition module according to the temperature and humidity sensor, the smoothness detector and the image acquisition device;
the target feature generation unit is used for carrying out multi-feature collection on the target jet printing object through the intelligent feature collection module to obtain the target feature set.
Further, the color correction model building module 16 further includes:
a test color block building unit for building a test color block group, wherein the test color block group comprises a plurality of test color blocks;
the pre-spray printing data obtaining unit is used for obtaining the color data of each test color block in the plurality of test color blocks and is used as pre-spray printing data;
the spray printing result obtaining unit is used for sequentially spray printing the plurality of test color blocks to the target spray printing object to obtain a spray printing result, wherein the spray printing result comprises the spray printing result of each test color block in the plurality of test color blocks;
the post-spray-printing data obtaining unit is used for detecting the density of the spray printing result of each test color block through a spectrodensimeter to obtain spray printing result data;
and the color correction model construction unit is used for constructing the intelligent color correction model according to the pre-jet printing data and the jet printing result data.
Further, the test color block building unit further includes:
a color channel obtaining unit for obtaining a plurality of color channels of the target color ink jet printing apparatus;
a color channel marking unit for sequentially extracting and obtaining a C channel, an M channel, a Y channel, a K channel, an O channel and an O channel in the plurality of color channels 1 A channel;
the dot tone design unit is used for sequentially carrying out the steps of the C channel, the M channel, the Y channel, the K channel, the O channel and the O based on the preset dot percentage 1 The channel carries out the tone design of the net points;
and the test color block generating unit is used for obtaining the plurality of test color blocks according to the halftone design result and constructing the test color block group.
Further, the color correction model building unit further includes:
the spray printing result detection unit is used for extracting any one test color block in the plurality of test color blocks and respectively obtaining the data before spray printing of the test color block and the spray printing result data of the test color block;
the tone value obtaining unit is used for obtaining the tone value of each channel dot of the test color block under the ICC characteristic file state based on the data before the test color block is printed;
the tone value obtaining unit is used for obtaining the tone value of each channel dot of the test color block to be calibrated based on the test color block jet printing result data;
the color correction formula generation unit is used for correcting the color of the tone gradation value of each channel of the test color block to be corrected by taking the tone gradation value of each channel of the test color block in the ICC characteristic file state as a color correction reference, and the specific color correction formula is as follows:
D i ′＝D Oi +(D i -D Oi )*a
Wherein the D is Oi Refers to the tone value of each channel dot of the test color block in the ICC profile state, the D i Refers to the tone value of the dot gradation of each channel of the test color block to be calibrated, the D i ' refers to the tone adjustment value of each channel dot of the test color block after color correction, a refers to the color correction parameter, and a is more than or equal to 0 and less than or equal to 1;
and the color correction model generating unit is used for obtaining the intelligent color correction model according to the color correction formula.
Further, the system further comprises:
the test sample obtaining unit is used for extracting any halftone level of any channel as a test sample, wherein the test sample is used for obtaining the color correction parameters through test calculation;
the test data obtaining unit is used for obtaining the dot tone value of the test sample in the ICC characteristic file state;
the test sampling execution unit is used for sampling and constructing a test sample jet printing result set, wherein the test sample jet printing result set comprises a plurality of jet printing results;
the average value calculation unit is used for sequentially detecting and obtaining the dot tone values of the plurality of jet printing results and calculating to obtain the dot tone average value of the jet printing results;
the color correction parameter optimizing unit is used for determining a plurality of color correction parameter values by using a dichotomy and calculating a plurality of dot correction values of the test sample by combining the dot tone value of the test sample in the ICC characteristic file state and the dot tone average value of the jet printing result;
And the color correction parameter determining unit is used for sequentially correcting the colors of the test sample by utilizing the plurality of dot color correction values, and comparing and analyzing each color correction result to determine the color correction parameters.
Further, the color correction parameter determining unit further includes:
the output value correction unit is used for correcting the output value of the test sample by sequentially utilizing photo shop software based on the plurality of dot correction values to obtain a plurality of correction outputs;
the color ink jet printing execution unit is used for sequentially utilizing the target color ink jet printing equipment to carry out jet printing based on the plurality of correction outputs to obtain a plurality of jet printing results;
the spray printing result detection unit is used for sequentially detecting the spray printing results by utilizing the spectrodensitometer to obtain a plurality of spray printing result data;
the data difference value calculation unit is used for sequentially comparing and calculating the plurality of jet printing result data with the halftone dot tone value of the test sample in the ICC characteristic file state to respectively obtain a plurality of difference values;
the difference matching obtaining unit is used for screening jet printing result data with the smallest difference value from the plurality of difference values, reversely matching the corresponding dot correction value and taking the dot correction value as the color correction parameter.
Any of the methods or steps described above may be stored as computer instructions or programs in various non-limiting types of computer memories, and identified by various non-limiting types of computer processors, thereby implementing any of the methods or steps described above.
Based on the above-mentioned embodiments of the present invention, any improvements and modifications to the present invention without departing from the principles of the present invention should fall within the scope of the present invention.
Claims (5)
1. An intelligent color correction method for color ink jet printing, which is characterized by comprising the following steps:
obtaining a qualification standard of a target jet printing object, wherein the qualification standard comprises a material qualification standard and an apparent qualification standard;
performing multi-feature collection on the target jet printing object to obtain a target feature set;
according to the target feature set, analyzing and judging whether the target jet printing object meets the material qualification standard and the apparent qualification standard;
according to the judging result, if the target jet printing object meets the material qualification standard and the apparent qualification standard at the same time, performing color ink jet printing on the target jet printing object;
acquiring data of color ink jet printing of the target jet printing object through a spectrodensimeter to obtain dot gradation values of all channels;
Constructing an intelligent color correction model by utilizing a halftone dot tone correction principle;
sequentially adjusting the dot gradation values of all the channels through the intelligent color correction model to obtain a color correction result of the color ink jet printing of the target jet printing object;
the method further comprises the steps of:
constructing a test color block group, wherein the test color block group comprises a plurality of test color blocks;
obtaining color data of each test color block in the plurality of test color blocks and taking the color data as data before jet printing;
sequentially spray-printing the plurality of test color blocks to the target spray-printed object to obtain a spray-printing result, wherein the spray-printing result comprises the spray-printing result of each test color block in the plurality of test color blocks;
performing density detection on the jet printing results of the test color blocks through a spectrodensitometer to obtain jet printing result data;
constructing the intelligent color correction model according to the pre-spray printing data and the spray printing result data;
according to the pre-spray printing data and the spray printing result data, constructing the intelligent color correction model comprises the following steps:
extracting any one test color block of the plurality of test color blocks, and respectively obtaining data before spray printing of the test color block and spray printing result data of the test color block;
Based on the data before the spray printing of the test color block, obtaining the tone value of each channel dot tone of the test color block under the ICC characteristic file state;
obtaining the dot gradation value of each channel of the test color block to be calibrated based on the test color block jet printing result data;
and taking the tone value of each channel of the test color block in the ICC characteristic file state as a color correction reference, and performing color correction on the tone value of each channel of the test color block to be color-corrected, wherein a specific color correction formula is as follows:
D i ′＝D Oi +(D i -D Oi )*a
wherein the D is Oi Refers to the tone value of each channel dot of the test color block in the ICC profile state, the D i Refers to the tone value of the dot gradation of each channel of the test color block to be calibrated, the D i ' refers to the tone adjustment value of each channel dot of the test color block after color correction, a refers to the color correction parameter, and a is more than or equal to 0 and less than or equal to 1;
obtaining the intelligent color correction model according to the color correction formula;
before the intelligent color correction model is obtained according to the color correction formula, the method further comprises the following steps:
extracting any halftone of any channel as a test sample, wherein the test sample is used for obtaining the color correction parameters through test calculation;
obtaining a halftone dot tone value of the test sample in an ICC profile state;
Sampling and constructing a test sample jet printing result set, wherein the test sample jet printing result set comprises a plurality of jet printing results;
sequentially detecting and obtaining dot tone values of the plurality of jet printing results, and calculating to obtain a dot tone average value of the jet printing results;
determining a plurality of color correction parameter values by using a dichotomy, and calculating a plurality of dot color correction values of the test sample by combining the dot tone value of the test sample in the ICC characteristic file state and the dot tone average value of the jet printing result;
and sequentially correcting the colors of the test sample by utilizing the plurality of dot correction values, and comparing and analyzing each color correction result to determine the color correction parameters.
2. The intelligent color correction method according to claim 1, wherein the obtaining the target feature set includes:
according to the material qualification standard, setting a temperature and humidity sensor to perform intelligent characteristic acquisition of temperature and humidity on the target jet printing object;
according to the apparent qualification standard, a smoothness detector and an image acquisition device are sequentially arranged, and intelligent characteristic acquisition of surface smoothness and surface color is respectively carried out on the target spray printing object;
an intelligent characteristic acquisition module is built according to the temperature and humidity sensor, the smoothness detector and the image acquisition device;
And carrying out multi-feature collection on the target jet printing object through the intelligent feature collection module to obtain the target feature set.
3. The intelligent color correction method according to claim 1, wherein the constructing a test color patch group includes:
obtaining a plurality of color channels of a target color ink jet printing device;
sequentially extracting to obtain a C channel, an M channel, a Y channel, a K channel, an O channel and an O channel in the plurality of color channels 1 A channel;
based on the preset dot percentage, the C channel, the M channel, the Y channel, the K channel, the O channel and the O channel are sequentially processed 1 The channel carries out the tone design of the net points;
and obtaining the plurality of test color blocks according to the halftone design result, and constructing the test color block group.
4. The intelligent color correction method according to claim 1, wherein the sequentially performing color correction on the test sample using the plurality of dot color correction values, and comparing and analyzing each color correction result, and determining the color correction parameter includes:
based on the plurality of dot correction values, sequentially correcting the output value of the test sample by utilizing photo shop software to obtain a plurality of correction outputs;
based on the correction outputs, sequentially performing jet printing by using target color ink jet printing equipment to obtain a plurality of jet printing results;
Sequentially detecting the spray printing results by using a spectrodensitometer to obtain a plurality of spray printing result data;
sequentially comparing the multiple jet printing result data with the dot tone values of the test sample in the ICC profile state to obtain multiple difference values;
and screening jet printing result data with the minimum difference value from the plurality of difference values, reversely matching the corresponding dot correction value, and taking the dot correction value as the color correction parameter.
5. An intelligent color correction system for color ink jet printing, characterized in that the system performs the method of any one of claims 1 to 4, the system comprising:
the qualified standard obtaining module is used for obtaining qualified standards of the target jet printing object, wherein the qualified standards comprise material qualified standards and apparent qualified standards;
the intelligent feature acquisition module is used for carrying out multi-feature acquisition on the target jet printing object to obtain a target feature set;
the material qualification judging module is used for analyzing and judging whether the target jet printing object meets the material qualification standard and the apparent qualification standard according to the target feature set;
the color ink jet printing execution module is used for carrying out color ink jet printing on the target jet printing object according to the judging result if the target jet printing object meets the material qualification standard and the apparent qualification standard at the same time;
The spray printing data acquisition module is used for acquiring data of color ink spray printing of the target spray printing object through a spectrodensimeter to obtain dot gradation values of all channels;
the color correction model construction module is used for constructing an intelligent color correction model by utilizing the halftone tone correction principle;
and the color correction result output module is used for sequentially adjusting the dot gradation values of all the channels through the intelligent color correction model to obtain the color correction result of the color ink jet printing of the target jet printing object.
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