CN115599318A - Ink-jet printer color-tracing method, device and equipment - Google Patents
Ink-jet printer color-tracing method, device and equipment Download PDFInfo
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- 238000007641 inkjet printing Methods 0.000 abstract description 2
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- 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
- G06F3/1204—Improving or facilitating administration, e.g. print management resulting in reduced user or operator actions, e.g. presetting, automatic actions, using hardware token storing data
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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
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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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- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
- G06F3/1237—Print job management
- G06F3/1253—Configuration of print job parameters, e.g. using UI at the client
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Abstract
The invention discloses a color tracing method, device and equipment of an ink-jet printer, and relates to the technical field of ink-jet printing. The method is simple and quick, does not need to depend on repeated debugging of color matching personnel, can achieve small color difference of color matching and has good color matching effect.
Description
Technical Field
The invention relates to the technical field of ink-jet printing, in particular to a color-tracing method, a color-tracing device and color-tracing equipment of an ink-jet printer.
Background
The ink-jet printer has wide application in the fields of outdoor advertising, label printing, textile printing, ceramic printing, printing electronics, home decoration and the like. In order to ensure that the amount of ink input by the printer is closer to the amount of ink actually output, color management of the inkjet printer is required. In the color management process of the ink-jet printer, the ICC file of the printer is adjusted to control the output ink amount of each channel of the printer, so that the overall printing color effect of the printer is controlled. However, in actual production applications, when one or more printers are required to print a proof having a color matching that of a target ink jet printer, it is necessary to perform a process of printing a color-chasing process for the one or more printers. However, the ICC file in color management cannot meet the requirements only by adjusting, and the general method in the prior art is to repeatedly debug the linearization curve of the inkjet printer to be traced by manpower and then print an image, and finally find a target ink volume input value which is the same as or similar to the target ink volume input by the target machine.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, an apparatus, and a device for color-chasing in an inkjet printer, so as to solve the problems of complicated color-chasing and time and labor consuming in the inkjet printer in the prior art.
In a first aspect, an embodiment of the present invention provides a method for color chasing of an inkjet printer, where the method includes:
acquiring a first linear color block diagram according to a linearization curve of a target ink-jet printer, wherein the first linear color block diagram comprises a plurality of color blocks with different ink amounts;
acquiring a second linear color block diagram according to a linearization curve of the ink-jet printer to be subjected to color chasing, wherein the second linear color block diagram comprises a plurality of color blocks with different ink amounts, and the number of the color blocks of the second linear color block diagram is the same as that of the color blocks of the first linear color block diagram;
acquiring the color difference value of the color block with the maximum ink amount and the color block with the minimum ink amount in the first linear color block diagram, and recording the color difference value as the maximum color difference value;
acquiring a third linear color lump diagram of the ink-jet printer to be subjected to color chasing according to the maximum color difference value, the first linear color lump diagram and the second linear color lump diagram, wherein the third linear color lump diagram comprises a plurality of color lumps with different ink amounts, and the number of the color lumps of the third linear color lump diagram is the same as that of the second linear color lump diagram;
and acquiring a color matching curve of the ink jet printer to be matched according to the first linear color block diagram and the third linear color block diagram.
Preferably, the obtaining the third linear color patch map of the ink jet printer to be color-chased according to the maximum color difference value comprises:
respectively calculating the color difference value of each color block in the second linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, acquiring the ink amount of each color block in the second linear color block diagram and a set of corresponding color difference values thereof, and recording the set as a first color difference set;
acquiring the ink amount corresponding to the maximum color difference value according to the first color difference set, and recording the ink amount as the actual maximum printing ink amount;
and acquiring a third linear color block diagram of the ink-jet printer to be subjected to color chasing according to the actual maximum printing ink amount and the linearization curve of the ink-jet printer to be subjected to color chasing.
Preferably, the obtaining the ink amount corresponding to the maximum color difference value according to the first color difference set, and the marking as the maximum actual printing ink amount includes:
and carrying out interpolation on the first color difference set by adopting an interpolation method to obtain the ink amount corresponding to the maximum color difference value.
Preferably, the obtaining the ink amount corresponding to the maximum color difference value according to the first color difference set, and the marking as the maximum actual printing ink amount includes:
fitting elements in the first color difference set to obtain a first fitting curve;
and substituting the maximum color difference value into the first fitting curve to obtain the ink amount corresponding to the maximum color difference value.
Preferably, the method further comprises:
when the actual printing maximum ink amount is not within a preset ink amount range, first external input information is acquired as the actual printing maximum ink amount.
Preferably, the acquiring of the color matching curve of the inkjet printer to be color matched according to the first linear color patch map and the third linear color patch map comprises:
respectively calculating the color difference value of each color block in the third linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, acquiring the ink amount of each color block in the third linear color block diagram and the corresponding color difference value thereof, and recording as a second color difference set;
respectively calculating the color difference value of each color block in the first linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, acquiring the ink amount of each color block in the first linear color block diagram and a set of the corresponding color difference values, and recording the set as a third color difference set;
and acquiring a color tracing curve of the ink-jet printer to be traced according to the second color difference set and the third color difference set.
Preferably, the acquiring a color tracing curve of the inkjet printer to be color traced according to the second color difference set and the third color difference set comprises:
fitting elements in the second color difference set to obtain a second fitting curve;
acquiring color block ink amount of all elements in the third color difference set, and recording the color block ink amount as first ink amount;
obtaining a second ink amount corresponding to the color difference values in all elements of the third color difference set according to the second fitting curve;
and fitting the first ink amount and the second ink amount to obtain a color matching curve of the ink jet printer to be subjected to color matching.
Preferably, the number of color blocks of the first linear color block map or the second linear color block map ranges from 10 to 101.
Preferably, the method further comprises: acquiring a fourth linear color block diagram according to the color tracing curve; the fourth linear color block diagram comprises a plurality of color blocks with different ink amounts, and the number of the color blocks of the fourth linear color block diagram is the same as that of the color blocks of the first linear color block diagram;
acquiring color difference values of color blocks at the same positions in the fourth linear color block diagram and the first linear color block diagram, and recording the color difference values as contrast color difference values;
and when the contrast color difference value is not within a preset color difference range, acquiring second external input information and adjusting the color tracing curve according to the second external input information.
In a second aspect, an embodiment of the present invention provides a color-chasing apparatus for an inkjet printer, the apparatus including:
the first linear color block map acquisition module is used for acquiring a first linear color block map according to a linearization curve of a target ink-jet printer, wherein the first linear color block map comprises a plurality of color blocks with different ink amounts;
the second linear color block diagram acquisition module is used for acquiring a second linear color block diagram according to a linearization curve of the ink-jet printer to be subjected to color tracing, wherein the second linear color block diagram comprises a plurality of color blocks with different ink amounts, and the number of the color blocks of the second linear color block diagram is the same as that of the first linear color block diagram;
a maximum color difference value obtaining module, configured to obtain color difference values of a color block with the largest ink amount and a color block with the smallest ink amount in the first linear color block diagram, and record the color difference values as maximum color difference values;
a third linear color patch map obtaining module, configured to obtain a third linear color patch map of the inkjet printer to be color-chased according to the maximum color difference value, the first linear color patch map, and the second linear color patch map, where the third linear color patch map includes a plurality of color patches with different ink amounts, and the number of the color patches in the third linear color patch map is the same as that in the second linear color patch map;
and the color-tracing curve acquisition module is used for acquiring the color-tracing curve of the ink-jet printer to be subjected to color tracing according to the first linear color block diagram and the third linear color block diagram.
In a third aspect, an embodiment of the present invention provides a color chasing apparatus for an inkjet printer, including: at least one processor, at least one memory, and computer program instructions stored in the memory, which when executed by the processor, implement the method of the first aspect of the embodiments described above.
In a fourth aspect, an embodiment of the present invention provides a storage medium, on which computer program instructions are stored, and when the computer program instructions are executed by a processor, the method of the first aspect in the foregoing embodiments is implemented.
In summary, the invention has the following beneficial effects:
according to the method, the device and the equipment for color chasing of the ink-jet printer and the storage medium, the first linear color block diagram of the target ink-jet printer and the second linear color block diagram of the ink-jet printer to be chased are obtained respectively, then the third linear color block diagram is obtained according to the first linear color block diagram and the second linear color block diagram, then the first linear color block diagram and the third linear color block diagram are used for obtaining the color chasing curve of the ink-jet printer to be chased, and compared with the technical means of manually and repeatedly debugging to obtain the color chasing curve of the ink-jet printer to be chased, the method is simple and quick, does not need to depend on color matching personnel to debug repeatedly, can achieve small color difference of chasing, and is good in chasing effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, without any creative effort, other drawings may be obtained according to the drawings, and these drawings are all within the protection scope of the present invention.
FIG. 1 is a schematic flow chart of a color matching method of an inkjet printer according to an embodiment of the present invention.
FIG. 2a is a schematic diagram of a first linear color tile of an embodiment of the present invention.
FIG. 2b is a linear curve corresponding to the CMYK color channels according to the embodiment of the present invention.
FIG. 3 is a schematic diagram of another first linear color tile of an embodiment of the present invention.
FIG. 4 is a schematic diagram of a third linear color patch diagram according to an embodiment of the invention.
FIG. 5 is a schematic diagram of a color tracking curve of the C color channel according to an embodiment of the present invention.
FIG. 6 is a schematic diagram of a color-registering device of an ink-jet printer according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a color-chasing apparatus of an inkjet printer according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" comprises 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Example one
The embodiment of the invention provides a color matching method of an ink-jet printer, which is suitable for performing printing color matching processing on the ink-jet printer. In practical production applications, one or more printers are often required to print a proof with the same color as that of a target ink jet printer, so that the one or more printers need to be subjected to printing and color-chasing processing. Referring to fig. 1, the present invention specifically includes the following steps:
s1: acquiring a first linear color block diagram according to a linearization curve of a target ink-jet printer, wherein the first linear color block diagram consists of a plurality of color blocks with different ink amounts;
s2: acquiring a second linear color block diagram according to a linearization curve of the ink-jet printer to be subjected to color tracing, wherein the second linear color block diagram is composed of a plurality of color blocks with different ink amounts, and the number of the color blocks of the second linear color block diagram is the same as that of the color blocks of the first linear color block diagram;
s3: acquiring color difference values of color blocks with the maximum ink amount and color blocks with the minimum ink amount in the first linear color block diagram, and recording the color difference values as maximum color difference values;
s4, acquiring a third linear color block diagram of the ink-jet printer to be subjected to color chasing according to the maximum color difference value, the first linear color block diagram and the second linear color block diagram, wherein the third linear color block diagram comprises a plurality of color blocks with different ink amounts, and the number of the color blocks of the third linear color block diagram is the same as that of the color blocks of the second linear color block diagram;
and S5, acquiring a color matching curve of the ink-jet printer to be subjected to color matching according to the first linear color block diagram and the third linear color block diagram.
Specifically, the linearization curve of the target inkjet printer is a linearization curve of color management of the target inkjet printer, and a first linear color patch map is printed according to the linearization curve of the target inkjet printer, wherein the first linear color patch map includes a plurality of color patches with different ink amounts. Illustratively, as shown in fig. 2b, the first linear color block diagram includes 21 color blocks with different ink amounts, the 21 color blocks with different ink amounts are arranged in sequence from small to large according to the ink amount, and assuming that the ink output amount of the target inkjet printer is 0 at minimum and 100 at maximum, the ink amount interval between each color block in the first linear color block diagram is 5, and the ink output amount of each color block is 0,5,10,15, \ 8230 \ 8230;, 100 in sequence. It should be noted that the minimum and maximum ink output values of the target inkjet printer are not necessarily 0 and 100, and it is determined according to the actual printing situation, the ink amount interval between each color block and the number of the color blocks may also be set according to the actual application, and this is not limited herein, and the more the number of the color blocks, the more the obtained color tracing curve will be more accurate, and preferably, the value range of the number of the color blocks of the first linear color block map is 10 to 101. The first linear color patch diagram shown in fig. 2a is a color patch diagram of a single color channel, and in practical applications, the printer ink output channel includes four color channels CMYK, and each color channel corresponds to a linearization curve, as shown in fig. 2b, which is divided into linearization curves corresponding to the four color channels CMYK. When the color matching is performed in printing, the color matching is performed on only a single color channel to obtain the color matching curve of the single color channel, illustratively, the color matching is performed on only a C color channel, or the color matching is performed on a plurality of color channels to obtain the color matching curves of the plurality of color channels; if color chasing is performed on the four color channels of CMYK, chasing curves of the four color channels of CMYK are acquired. In some examples, the first linear color patch map may include any one, two or more color patch maps of a C color channel, an M color channel, a Y color channel, and a K color channel. The first linear patch diagram shown in fig. 3 includes patch diagrams of four channels of CMYK. This embodiment takes the C color channel for color matching as an example, and describes how to obtain a color matching curve for the C color channel.
After the target inkjet printer prints the first linear color block diagram, the actual color value of each color block in the first linear color block diagram is collected, and in one example, a photometer is used to obtain the actual Lab value or CMYK value of each color block in the first linear color block diagram, so as to facilitate the subsequent calculation of the color difference value.
In addition to the first linear color patch map of the target inkjet printer, a second linear color patch map printed by the target inkjet printer according to the linearization curve of the color management thereof needs to be acquired, which is similar to the first linear color patch map, the second linear color patch map includes 21 color patches with different ink amounts, the 21 color patches with different ink amounts are sequentially arranged from small to large according to the ink amount, the minimum ink output amount of the target inkjet printer is 0 and the maximum ink output amount is 100, then the ink amount interval between each color patch in the second linear color patch map is 5, and the ink output amount of each color patch is sequentially 0,5,10,15, 8230 \\\ 8230;, 100. Similarly, if the color matching is required to be performed on a plurality of color channels, the target ink-jet printer prints the linear color patch images of the four color channels of CMYK, and the ink-jet printer to be subjected to color matching prints the linear color patch images of the four color channels of CMYK. And after the second linear color block diagram is printed by the color-tracing ink-jet printer, acquiring the actual color value of each color block in the second linear color block diagram, and in one example, acquiring the actual Lab value or CMYK value of each color block in the second linear color block diagram by using a photometer so as to facilitate the subsequent calculation of the color difference value.
After color value data of color blocks of the first linear color block diagram and the second linear color block diagram are acquired, color difference values of the color block with the largest ink amount and the color block with the smallest ink amount in the first linear color block diagram are acquired and recorded as a maximum color difference value delta E, and a third linear color block diagram of the ink-jet printer to be subjected to color tracing is acquired according to the maximum color difference value delta E. Preferably, S4 comprises:
s41: respectively calculating the color difference value of each color block in the second linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, acquiring the ink amount of each color block in the second linear color block diagram and a set of the corresponding color difference value thereof, and marking as a first color difference set;
s43: acquiring the ink amount corresponding to the maximum color difference value according to the first color difference set, and recording the ink amount as the actual maximum printing ink amount;
s44: and acquiring a third linear color block diagram of the ink-jet printer to be subjected to color chasing according to the actual maximum printing ink amount and the linearization curve of the ink-jet printer to be subjected to color chasing.
Specifically, color difference values of each color block in the second linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram are respectively obtained, and a set of the ink amount of the color block and the corresponding color difference value is obtained and recorded as a first color difference set P. P = { (C1, Δ E1), (C2, Δ E2), \8230; (Cn, Δ En) }, where Δ E1 is a color difference value of a first color patch in the second linear color patch map and a color patch in the first linear color patch map having the smallest ink amount, C1 is an ink amount corresponding to the first color patch in the second linear color patch map, Δ E2 is a color difference value of a second color patch in the second linear color patch map and a color patch in the first linear color patch map having the smallest ink amount, C2 is an ink amount corresponding to the second color patch in the second linear color patch map, and so on, Δ En is a color difference value of an nth color patch in the second linear color patch map and a color patch in the first linear color patch map, cn is an ink amount corresponding to an nth color patch in the second linear color patch map, and n is the number of the second linear color patch maps.
Each element (Δ E1, C1), (Δ E2, C2), \8230 \ 8230; (Δ En, cn) in the first color difference set P characterizes n coordinate points on a two-dimensional plane with ink value as the x-axis and color difference value as the y-axis. In one example, according to the coordinate position of the maximum color difference value Δ E, an interpolation method is adopted to obtain an ink amount value corresponding to the maximum color difference value Δ E, and the ink amount value is recorded as the actual printing maximum ink amount Cmax; in another example, (Δ E1, C1), (Δ E2, C2), \8230; (Δ En, cn) may also be fitted to obtain a first fitted curve, and then the maximum color difference value Δ E may be substituted into the fitted curve to obtain the ink amount Cmax corresponding to the maximum color difference value Δ E.
And taking the actually printed maximum ink amount Cmax as the maximum ink output amount of the ink jet printer to be subjected to color chasing, and then printing a third linear color block diagram according to a linearization curve of the ink jet printer to be subjected to color chasing, wherein the third linear color block diagram consists of a plurality of color blocks with different ink amounts, and the number of the color blocks of the third linear color block diagram is the same as that of the second linear color block diagram. For example, assuming that the actual printing maximum ink amount Cmax is 88, the third linear color patch diagram is shown in fig. 4. After the third linear color patch image is printed by the color-tracing ink-jet printer, the actual color value of each color patch in the third linear color patch image is collected, and in one example, the actual Lab value or CMYK value of each color patch in the third linear color patch image is obtained by using a photometer, so as to facilitate the subsequent calculation of the color difference value.
In one embodiment, when the maximum actual printing maximum ink amount obtained by interpolation or curve fitting is not within the preset ink amount range, the first external input information may also be acquired as the actual printing maximum ink amount. The first external input information may be an ink amount value set by a user according to actual application conditions, and the preset ink amount range may be set by the user according to actual application conditions. Illustratively, when the user finds out from the accumulated actual printing maximum ink amount to be in the range of 90 to 95, the color chasing effect is more excellent, then the preset ink amount range may be set to 90 ≦ Cmax ≦ 95, and when the actual printing maximum ink amount (e.g., cmax = 88) found by interpolation or fitting is not in the preset ink amount range, this value may not be adopted, but the ink amount value input by the user is taken as the value of the actual printing maximum ink amount, so that the final color chasing effect is more satisfactory to the user.
And after the third linear color block diagram of the ink-jet printer to be subjected to color matching is obtained, further obtaining a color matching curve of the ink-jet printer to be subjected to color matching according to the first linear color block diagram and the third linear color block diagram. Preferably, S5 comprises:
s51: respectively calculating the color difference value of each color block in the third linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, acquiring the ink amount of each color block in the third linear color block diagram and the corresponding color difference value thereof, and recording as a second color difference set;
s52: respectively calculating the color difference value of each color block in the first linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, acquiring the ink amount of each color block in the first linear color block diagram and a set of the corresponding color difference value thereof, and recording the set as a third color difference set;
s53: and acquiring a color tracing curve of the ink-jet printer to be traced according to the second color difference set and the third color difference set.
Preferably, S53 further comprises:
s531: fitting elements in the second color difference set to obtain a second fitting curve;
s532: acquiring the ink amount of color blocks in all elements in the third color difference set, and recording the ink amount as a first ink amount;
s533: obtaining a second ink amount corresponding to the color difference values in all elements of the third color difference set according to the second fitting curve;
s534: and fitting the first ink amount and the second ink amount to obtain a color tracing curve of the ink jet printer to be subjected to color tracing.
Specifically, the color difference values of each color block in the third linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram are respectively calculated, and a second color difference set a, a = { (C) is obtained A1 ，ΔE A1 ),(C A2 ，ΔE A2 ),……，(C An ，ΔE An ) In which Δ E A1 Is the color difference value of the first color block in the third linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, C A1 Is the ink amount, Δ E, corresponding to the first patch in the third linear patch chart A2 Is the color difference value of the second color block in the third linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, C A2 The ink amount corresponding to the second color block in the third linear color block diagram, and so on, delta E An Is the color difference value of the second color block in the third linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, C An The ink amount corresponding to the first color block in the third linear color block diagram, and n is the number of the color blocks of the third linear color block diagram.
Similarly, the color difference values of each color block in the first linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram are respectively calculated, and a third color difference set B, B = { (C) is obtained B1 ，ΔE B1 ),(C B2 ，ΔE B2 ),……，(C Bn ，ΔE Bn ) In which Δ E B1 Is the color difference value of the first color block in the first linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, C B1 Is the ink volume, Δ E, corresponding to the first color patch in the first linear color patch map B2 Is the color difference value of the second color block in the first linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, C B2 The ink amount corresponding to the second color patch in the first linear color patch map, and so on, Δ E Bn Is the color difference value of the n-th color block in the first linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, C Bn The ink amount corresponding to the nth color block in the first linear color block diagram is shown, and n is the number of the color blocks of the third linear color block diagram. The ink quantity C of color blocks of each element of the third color difference set B1 、C B2 、……、C Bn Collectively referred to as a first ink volume.
In the second color difference set, each element (C) A1 ，ΔE A1 ),(C A2 ，ΔE A2 ),……，(C An ，ΔE An ) N coordinate points with ink value as x-axis and color difference value as y-axis are characterized on a two-dimensional plane. For those in the second color difference set APerforming cubic spline curve fitting on all elements to obtain a second fitting curve;
obtaining a second ink amount corresponding to the color difference values in all elements of the third color difference set according to a second fitting curve; the color difference values deltaE in all elements in the third color difference set B1 、ΔE B2 、……、ΔE Bn Substituting the obtained color difference value into a second fitting curve to obtain a second ink amount corresponding to each color difference value: c B1 ’、C B2 ’、……、C Bn ', pair (C) B1 、C B1 ’)，(C B2 、C B2 ’)，……，(C Bn ，C Bn ') fitting, and obtaining a fitting curve which is the color tracing curve of the C color channel of the ink-jet printer to be color traced. Exemplarily, as shown in FIG. 5, is pair (C) B1 、C B1 ’)，(C B2 、C B2 ’)，……，(C Bn ，C Bn ') the color tracing curve of the C color channel obtained by fitting each point.
Similarly, a tracing curve of an M color channel, a Y color channel, a K color channel, or a mixing channel of the inkjet printer to be traced can also be obtained.
In one embodiment, after acquiring the color tracing curve of the ink jet printer to be traced, the method further comprises:
acquiring a fourth linear color block diagram according to the color tracing curve; the fourth linear color block diagram comprises a plurality of color blocks with different ink amounts, and the number of the color blocks of the fourth linear color block diagram is the same as that of the color blocks of the first linear color block diagram;
acquiring a color difference value of a color block at the same position in the fourth linear color block diagram as that in the first linear color block diagram, and recording the color difference value as a corrected color difference value;
and when the corrected color difference value is not within a preset color difference range, acquiring second external input information and adjusting the color tracing curve according to the second external input information.
Specifically, a fourth linear color block diagram is obtained by printing the color block diagram according to the color tracing curve, wherein the fourth linear color block diagram comprises a plurality of color blocks with different ink amounts, and the number of the color blocks is the same as that of the color blocks of the first linear color block diagram printed by the target ink jet printer; comparing color blocks at the same position in the fourth linear color block diagram with the color blocks at the same position in the first linear color block diagram, wherein color block comparison can be realized by acquiring the actual Lab value or CMYK value of a certain color block in the fourth linear color block diagram by using a photometer and then comparing the actual Lab value or CMYK value with the Lab value or CMYK value of the color block at the same position in the first linear color block diagram to obtain a color difference value (marked as a comparison color difference value); or a photometer is used for obtaining the actual Lab values or CMYK values of all color blocks in the fourth linear color block diagram, and then the actual Lab values or CMYK values are compared with the Lab values or CMYK values of the color blocks at the same position in the first linear color block diagram to obtain a plurality of contrast color difference values, when any contrast color difference value is not within a preset color difference range (the preset color difference range can be set by a user according to the actual condition or can be automatically set by an ink-jet printer to be subjected to color tracing, and is not limited), the color tracing curve is considered to be still required to be optimized, at this time, manual adjustment can be carried out according to second external input information (such as user input), or the actual maximum ink printing value is revised again, and a new color tracing curve is generated again, so that a better color tracing effect which is closer to the user expectation is obtained.
In summary, according to the color matching method for the inkjet printer provided by the embodiment of the invention, the first linear color block diagram of the target inkjet printer and the second linear color block diagram of the inkjet printer to be color-matched are respectively obtained, the third linear color block diagram is obtained according to the first linear color block diagram and the second linear color block diagram, the color matching curve of the inkjet printer to be color-matched is obtained by using the first linear color block diagram and the third linear color block diagram, and compared with the technical means of obtaining the color matching curve of the inkjet printer to be color-matched through manual and repeated debugging, the method provided by the invention is simple and rapid, does not need to depend on repeated debugging of a color matching person, can achieve a very small color difference of color matching, and has a good color matching effect.
Example two
Referring to fig. 6, an embodiment of the present invention provides a color matching apparatus 200 for an inkjet printer, where the apparatus 200 includes:
a first linear color patch acquiring module 201, configured to acquire a first linear color patch map according to a linearization curve of a target inkjet printer, where the first linear color patch map includes a plurality of color patches with different ink amounts;
a second linear color block obtaining module 202, configured to obtain a second linear color block map according to a linearization curve of the inkjet printer to be color-tracked, where the second linear color block map includes a plurality of color blocks with different ink amounts, and the number of the color blocks in the second linear color block map is the same as that in the first linear color block map;
a maximum color difference value obtaining module 203, configured to obtain color difference values of a color block with the largest ink amount and a color block with the smallest ink amount in the first linear color block map, and record the color difference values as maximum color difference values;
a third linear color block obtaining module 204, configured to obtain a third linear color block diagram of the inkjet printer to be color-chased according to the maximum color difference value, the first linear color block diagram, and the second linear color block diagram, where the third linear color block diagram includes a plurality of color blocks with different ink amounts, and the number of the color blocks in the third linear color block diagram is the same as that in the second linear color block diagram;
and the color matching curve acquiring module 205 is used for acquiring a color matching curve of the ink jet printer to be subjected to color matching according to the first linear color patch map and the third linear color patch map.
Further, the third linear patch acquisition module 204 comprises:
a first color difference set obtaining unit, configured to calculate a color difference value of each color block in the second linear color block diagram and a color block in the first linear color block diagram with a minimum ink amount, respectively, obtain a set of an ink amount of each color block in the second linear color block diagram and a corresponding color difference value thereof, and mark the set as a first color difference set;
an actual printing maximum ink amount obtaining unit, configured to obtain an ink amount corresponding to the maximum color difference value according to the first color difference set, and record the ink amount as an actual printing maximum ink amount;
and the third linear color block diagram acquisition unit is used for acquiring a third linear color block diagram of the ink-jet printer to be subjected to color tracking according to the actual printing maximum ink amount and the linearization curve of the ink-jet printer to be subjected to color tracking.
Further, the color-tracing-curve obtaining module 205 includes:
a second color difference set obtaining unit, configured to respectively calculate a color difference value between each color block in the third linear color block diagram and a color block in the first linear color block diagram with the smallest ink amount, obtain an ink amount of each color block in the third linear color block diagram and a corresponding color difference value thereof, and record the obtained ink amount and the corresponding color difference value as a second color difference set;
a third color difference obtaining unit, configured to respectively calculate a color difference value of each color block in the first linear color block diagram and a color block in the first linear color block diagram with a minimum ink amount, obtain a set of the ink amount of each color block in the first linear color block diagram and a color difference value corresponding to the ink amount, and record the set as a third color difference set;
and the color tracing curve acquisition unit is used for acquiring the color tracing curve of the ink jet printer to be subjected to color tracing according to the second color difference set and the third color difference set.
Further, the color-tracing-curve obtaining unit includes:
a second fitting curve obtaining unit, configured to fit elements in the second color difference set to obtain a second fitting curve;
a first ink amount obtaining unit for obtaining color block ink amounts of all elements in the third color difference set and recording the color block ink amounts as first ink amounts;
a second ink amount obtaining unit, configured to obtain, according to the second fitted curve, a second ink amount corresponding to a color difference value in all elements of the third color difference set;
and the fitting unit is used for fitting the first ink amount and the second ink amount to obtain a color-tracing curve of the ink-jet printer to be subjected to color tracing.
In summary, the inkjet printer color-chasing apparatus provided in the embodiment of the present invention obtains the first linear color block diagram of the target inkjet printer and the second linear color block diagram of the inkjet printer to be chased, respectively, then obtains the third linear color block diagram according to the first linear color block diagram and the second linear color block diagram, and then obtains the color-chasing curve of the inkjet printer to be chased by using the first linear color block diagram and the third linear color block diagram.
EXAMPLE III
In addition, the color matching method of the ink jet printer according to the embodiment of the invention can be realized by the color matching device of the ink jet printer. Fig. 7 is a schematic diagram showing a hardware structure of a color-chasing device of an inkjet printer according to an embodiment of the present invention.
The inkjet printer chasing device may include a processor 301 and a memory 302 storing computer program instructions.
In particular, the processor 301 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured as one or more Integrated circuits implementing embodiments of the present invention.
The processor 301 reads and executes the computer program instructions stored in the memory 302 to implement the color-chasing method of the inkjet printer in any of the above-described embodiments.
In one example, an inkjet printer chasing device can also include a communication interface 303 and a bus 310. As shown in fig. 7, the processor 301, the memory 302, and the communication interface 303 are connected via a bus 310 to complete communication therebetween.
The communication interface 303 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiment of the present invention.
Example four
In addition, in combination with the color chasing method of the inkjet printer in the above embodiment, the embodiment of the present invention may be implemented by providing a computer-readable storage medium. The computer readable storage medium having stored thereon computer program instructions; the computer program instructions, when executed by the processor 301, implement any of the inkjet printer chasing methods in the above embodiments.
In summary, according to the method, the apparatus, the device, and the storage medium for color-chasing of the inkjet printer provided by the embodiments of the present invention, the first linear color block diagram of the target inkjet printer and the second linear color block diagram of the inkjet printer to be color-chased are respectively obtained, then the third linear color block diagram is obtained according to the first linear color block diagram and the second linear color block diagram, and then the color-chasing curve of the inkjet printer to be color-chased is obtained by using the first linear color block diagram and the third linear color block diagram.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include an electronic circuit, a semiconductor memory device, a ROM, a flash memory, an Erasable ROM (EROM), a floppy disk, a CD-ROM, an optical disk, a hard disk, an optical fiber medium, a Radio Frequency (RF) link, and so forth. The code segments may be downloaded via computer networks such as the internet, intranets, etc.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A method of chasing color in an ink jet printer, the method comprising:
acquiring a first linear color block diagram according to a linearization curve of a target ink-jet printer, wherein the first linear color block diagram comprises a plurality of color blocks with different ink amounts;
acquiring a second linear color block diagram according to a linearization curve of the ink-jet printer to be subjected to color tracing, wherein the second linear color block diagram comprises a plurality of color blocks with different ink amounts, and the number of the color blocks of the second linear color block diagram is the same as that of the color blocks of the first linear color block diagram;
acquiring color difference values of color blocks with the maximum ink amount and color blocks with the minimum ink amount in the first linear color block diagram, and recording the color difference values as maximum color difference values;
acquiring a third linear color lump diagram of the ink-jet printer to be subjected to color chasing according to the maximum color difference value, the first linear color lump diagram and the second linear color lump diagram, wherein the third linear color lump diagram comprises a plurality of color lumps with different ink amounts, and the number of the color lumps of the third linear color lump diagram is the same as that of the second linear color lump diagram;
and acquiring a color matching curve of the ink jet printer to be matched according to the first linear color block diagram and the third linear color block diagram.
2. The method for tracing color of an inkjet printer according to claim 1, wherein the obtaining a third linear color patch map of the inkjet printer to be traced according to the maximum color difference value, the first linear color patch map and the second linear color patch map comprises:
respectively calculating the color difference value of each color block in the second linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, acquiring the ink amount of each color block in the second linear color block diagram and a set of the corresponding color difference value thereof, and marking as a first color difference set;
acquiring the ink amount corresponding to the maximum color difference value according to the first color difference set, and recording the ink amount as the actual maximum printing ink amount;
and acquiring a third linear color block diagram of the ink-jet printer to be subjected to color tracing according to the actual maximum printing ink amount and the linearization curve of the ink-jet printer to be subjected to color tracing.
3. The method for tracing the color of an inkjet printer according to claim 2, wherein said obtaining the ink amount corresponding to the maximum color difference value from the first color difference set as the actual maximum printing ink amount comprises:
and carrying out interpolation on the first color difference set by adopting an interpolation method to obtain the ink amount corresponding to the maximum color difference value.
4. The method according to claim 2, wherein said obtaining the ink amount corresponding to the maximum color difference value from the first color difference set as the actual maximum printing ink amount comprises:
fitting elements in the first color difference set to obtain a first fitting curve;
and substituting the maximum color difference value into the first fitting curve to obtain the ink amount corresponding to the maximum color difference value.
5. The method of inkjet printer chasing according to claim 2, wherein the method further comprises:
when the actual printing maximum ink amount is not within a preset ink amount range, first external input information is acquired as the actual printing maximum ink amount.
6. The method for tracing the color of an inkjet printer according to any one of claims 1 to 5, wherein the step of obtaining the tracing curve of the inkjet printer to be traced according to the first linear color patch map and the third linear color patch map comprises:
respectively calculating the color difference value of each color block in the third linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, acquiring the ink amount of each color block in the third linear color block diagram and the corresponding color difference value thereof, and recording as a second color difference set;
respectively calculating the color difference value of each color block in the first linear color block diagram and the color block with the minimum ink amount in the first linear color block diagram, acquiring the ink amount of each color block in the first linear color block diagram and a set of the corresponding color difference value, and marking as a third color difference set;
and acquiring a color tracing curve of the ink-jet printer to be traced according to the second color difference set and the third color difference set.
7. The method for tracing color of an inkjet printer according to claim 6, wherein the obtaining a color tracing curve of the inkjet printer to be traced according to the second color difference set and the third color difference set comprises:
fitting the elements in the second color difference set to obtain a second fitting curve;
acquiring color block ink amount of all elements in the third color difference set, and recording the color block ink amount as first ink amount;
obtaining a second ink amount corresponding to the color difference values in all elements of the third color difference set according to the second fitted curve;
and fitting the first ink amount and the second ink amount to obtain a color tracing curve of the ink jet printer to be subjected to color tracing.
8. A method of chasing color in an ink jet printer according to any one of claims 1 to 5, wherein the method further comprises:
acquiring a fourth linear color block diagram according to the color tracing curve; the fourth linear color block diagram comprises a plurality of color blocks with different ink amounts, and the number of the color blocks of the fourth linear color block diagram is the same as that of the color blocks of the first linear color block diagram;
acquiring color difference values of color blocks at the same positions in the fourth linear color block diagram and the first linear color block diagram, and recording the color difference values as contrast color difference values; and when the contrast color difference value is not within a preset color difference range, acquiring second external input information and adjusting the color tracing curve according to the second external input information.
9. An ink jet printer chasing device, the device comprising:
the first linear color block diagram acquisition module is used for acquiring a first linear color block diagram according to a linearization curve of a target ink-jet printer, wherein the first linear color block diagram comprises a plurality of color blocks with different ink amounts;
the second linear color block diagram acquisition module is used for acquiring a second linear color block diagram according to a linearization curve of the ink-jet printer to be subjected to color tracing, wherein the second linear color block diagram comprises a plurality of color blocks with different ink amounts, and the number of the color blocks of the second linear color block diagram is the same as that of the first linear color block diagram;
a maximum color difference value obtaining module, configured to obtain a color difference value of a color block with the largest ink amount and a color block with the smallest ink amount in the first linear color block map, and mark the color difference value as a maximum color difference value;
a third linear color patch map obtaining module, configured to obtain a third linear color patch map of the inkjet printer to be color-chased according to the maximum color difference value, the first linear color patch map, and the second linear color patch map, where the third linear color patch map includes a plurality of color patches with different ink amounts, and the number of the color patches in the third linear color patch map is the same as that in the second linear color patch map;
and the color-tracing curve acquisition module is used for acquiring the color-tracing curve of the ink-jet printer to be subjected to color tracing according to the first linear color block diagram and the third linear color block diagram.
10. An ink jet printer chasing color apparatus, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, which when executed by the processor, implement the method of any one of claims 1-8.
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Address after: 518000 a201-a301, building a, Sino German European Industrial Demonstration Park, Hangcheng Avenue, guxing community, Xixiang street, Bao'an District, Shenzhen, Guangdong Applicant after: Shenzhen Hansen Software Co.,Ltd. Address before: 1701, 1703, building C6, Hengfeng Industrial City, 739 Zhoushi Road, Hezhou community, Hangcheng street, Bao'an District, Shenzhen, Guangdong 518000 Applicant before: SHENZHEN HOSONSOFT Co.,Ltd. |