CN115447283B - Print data processing method, device, equipment and medium for improving color block uniformity - Google Patents

Print data processing method, device, equipment and medium for improving color block uniformity Download PDF

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Publication number
CN115447283B
CN115447283B CN202110638052.1A CN202110638052A CN115447283B CN 115447283 B CN115447283 B CN 115447283B CN 202110638052 A CN202110638052 A CN 202110638052A CN 115447283 B CN115447283 B CN 115447283B
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China
Prior art keywords
printing
nozzle
ink
printing data
sub
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CN115447283A (en
Inventor
吴志亮
何伟
陈艳
黄中琨
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Shenzhen Hansen Software Co.,Ltd.
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Shenzhen Hosonsoft Co Ltd
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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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • 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
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
    • B41J3/543—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements with multiple inkjet print heads
    • 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
    • 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
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

The invention belongs to the technical field of printing, and provides a print data processing method, device, equipment and medium for improving color block uniformity. The print data processing method for improving the uniformity of color blocks comprises the following steps of S1: acquiring an ink quantity required by printing an image to be printed by adopting original printing precision as a first printing ink quantity; s2: processing an image to be printed according to the nozzle precision to obtain first print data; s3: splitting the first printing data into a plurality of sub printing data corresponding to each nozzle according to the number of the nozzles; s4: acquiring sub-printing data corresponding to a first nozzle as target printing data of the first nozzle; s5: and determining target printing data of each second nozzle according to the first ink value and the sub-printing data corresponding to each nozzle so that the sum of the printing ink amounts of all the nozzles is equal to the first printing ink amount. The invention also includes an apparatus, a device and a medium for performing the above method. The invention can improve the uniformity of the printed image.

Description

Print data processing method, device, equipment and medium for improving color block uniformity
Technical Field
The present invention relates to the field of inkjet printing technologies, and in particular, to a method, an apparatus, a device, and a medium for processing print data to improve color patch uniformity.
Background
The ink jet printing technology refers to a technology of ejecting ink drops onto a printing medium through nozzles on a nozzle to obtain images or characters, and mainly comprises two modes of reciprocating scanning printing and multi-nozzle side-by-side scanning printing. As shown in fig. 1, the shuttle scan printing is also called as multipass scan printing, which means that each unit of an image to be printed needs to be interpolated multiple times before printing is completed. Although the printing mode can realize printing with higher precision than that of a spray head, printing is low in printing efficiency because each area needs to be printed multiple times, for example, 4-pass scanning printing, and each unit consists of 4 pixel points, and each pixel point is printed by scanning.
With the improvement of the requirements on printing precision and printing speed, a plurality of spray heads are spliced to print in order to meet the printing precision and the printing speed, but the precision of the spray heads is limited and possibly cannot meet the precision required by customers, so that the high precision can be realized only by adopting a method of inserting point paper feeding, and when the inserting point paper feeding is performed, the decimal hole spacing can appear, but the problems of uneven and poor effect and the like of the final printed image are caused due to the conditions of machine paper feeding errors, spray head installation errors, machine shaking errors and the like. In this way, a method adopting reduced-precision printing is adopted at present, namely, the image precision is printed according to the precision of the spray heads, and the other spray heads repeat the printing data of the first spray head, so that the printing ink quantity of the whole image is ensured to be the same.
Disclosure of Invention
In view of the above, the present invention provides a print data processing method, apparatus, device and medium for improving color patch uniformity, which are used for solving the technical problem that the prior art cannot improve the uniformity of a printed image and reduce printing errors.
The technical scheme adopted by the invention is as follows:
in a first aspect, the present invention provides a print data processing method for improving uniformity of color patches, a head for printing including a first head and at least a second head, the method comprising:
s1: acquiring an ink quantity required by printing an image to be printed by adopting original printing precision as a first printing ink quantity;
s2: processing an image to be printed according to the nozzle precision to obtain first print data;
s3: splitting the first printing data into a plurality of sub printing data corresponding to each nozzle according to the number of the nozzles;
s4: acquiring sub-printing data corresponding to a first nozzle as target printing data of the first nozzle;
s5: and determining target printing data of each second nozzle according to the first ink value and the sub-printing data corresponding to each nozzle so that the sum of the printing ink amounts of all the nozzles is equal to the first printing ink amount.
The first printing ink quantity is the ink quantity required by printing an image to be printed by adopting original printing precision, and the target printing data of the second nozzle comprise sub-printing data corresponding to the target printing data.
Preferably, the step S5: determining target printing data of each second nozzle according to the first ink value and the sub-printing data corresponding to each nozzle so that the sum of the printing ink amounts of all the nozzles is equal to the first printing ink amount, comprising the following steps of;
s51: acquiring sub-printing data corresponding to the first nozzle and sub-printing data corresponding to each second nozzle;
s52: combining the sub-printing data corresponding to each second nozzle with the sub-printing data corresponding to the first nozzle to obtain reference printing data corresponding to each second nozzle;
s53: and determining target printing data of the second nozzle according to the number of nozzles for printing the image to be printed and the reference printing data according to the ink quantity difference.
Preferably, the step S53: determining target print data of a second head according to the difference in ink amount, the number of heads for printing an image to be printed, and the reference print data, comprising the steps of;
s531: determining the ink quantity required for printing all the sub-printing data as a second ink quantity according to the sub-printing data corresponding to each nozzle;
s532: acquiring the ink quantity required by target printing data of a first nozzle to be printed as a reference ink quantity Vr;
s533: acquiring an ink quantity difference Vd of the second printing ink quantity and the first printing ink quantity;
S534: acquiring the number N of spray heads for printing an image to be printed;
s335: comparing the Vd/Vr with the N-1;
s536: determining target printing data of the second nozzle according to the comparison result and the reference printing data;
wherein N is a positive integer greater than or equal to 2.
Preferably, the step S536: determining target print data of the second head according to the comparison result and the reference print data, comprising the following steps:
s3561: if (Vd/Vr) > (N-1), selecting at least one nozzle from the second nozzle as an adjusting nozzle;
s3562: the ink quantity of the reference printing data corresponding to the adjusting nozzle is improved to obtain target printing data corresponding to the adjusting nozzle;
s3563: and taking the reference printing data corresponding to the rest of the spray heads in the second spray head as target printing data corresponding to the rest of the spray heads.
Preferably, the step S536: determining target print data of the second head according to the comparison result and the reference print data, comprising the steps of:
s3564: if (Vd/Vr) < (N-1), selecting at least one spray head from the second spray heads as an adjusting spray head;
s3565: reducing the ink quantity of the reference printing data corresponding to the adjusting nozzle to obtain target printing data corresponding to the adjusting nozzle;
S3566: and taking the reference printing data corresponding to the rest of the spray heads in the second spray head as target printing data corresponding to the rest of the spray heads.
Preferably, in said S536: and determining the target printing data of the second spray heads according to the comparison result and the reference printing data, and taking the reference printing data corresponding to each second spray head as the target printing data corresponding to each second spray head if (Vd/Vr) = (N-1).
Preferably, the first print data is dot matrix data, and in the step S3: splitting the first printing data into a plurality of sub printing data corresponding to each spray head according to the number of the spray heads, wherein the sub printing data are dot matrix data, and the dot matrix positions of ink outlet points of each sub printing data are different.
In a second aspect, the present invention also provides a print data processing apparatus for improving patch uniformity, the apparatus comprising:
a first printing ink quantity acquisition module for acquiring, as a first printing ink quantity, an ink quantity required for printing an image to be printed with original printing accuracy;
the image processing module is used for processing the image to be printed according to the nozzle precision to obtain first print data;
The data splitting module is used for splitting the first printing data into a plurality of sub printing data corresponding to each spray head according to the number of the spray heads;
the first nozzle printing data acquisition module is used for acquiring sub-printing data corresponding to the first nozzle as target printing data of the first nozzle;
and the second nozzle printing data determining module is used for determining target printing data of each second nozzle according to the first ink value and the sub-printing data corresponding to each nozzle so that the sum of the printing ink amounts of all the nozzles is equal to the first printing ink amount.
In a third aspect, the present invention also provides a print data processing apparatus that improves patch uniformity, 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 the first aspect.
Fourth aspect the present invention also provides a medium having stored thereon computer program instructions which, when executed by a processor, implement the method of the first aspect.
The beneficial effects are that: according to the print data processing method, device, equipment and medium for improving the uniformity of color blocks, data printed according to the precision of the spray heads are split into a plurality of sub-data, and the sub-data are printed by the spray heads together. Since the target print data of the second head includes sub print data corresponding thereto, the second head can print sub print data printed with the head accuracy on the one hand and can deposit ink amount on the other hand. The first spray head and the second spray head print according to the sub-printing data printed by the spray head precision respectively, so that the fineness of the image is guaranteed, and errors printed by the spray head precision are diffused, so that the printing errors are reduced. And meanwhile, the second nozzle is used for accumulating the ink quantity, so that the final ink quantity is accumulated to the ink quantity with the original printing precision, and the uniformity of the printed image is ensured. Because the nozzle precision is adopted for printing, the situation that the paper feeding distance is a small number times of the hole spacing is avoided, and the printing precision error caused by the situations of machine paper feeding error, nozzle mounting error, machine shaking error and the like is avoided.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described, and it is within the scope of the present invention to obtain other drawings according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of multiple pass printing;
FIG. 2 is a flow chart of a print data processing method for improving patch uniformity of the present invention;
FIG. 3 is a flow chart of a method of determining target print data for a second head in accordance with the present invention;
FIG. 4 is a schematic diagram of a first type of combining sub-print data in the present invention;
FIG. 5 is a schematic diagram of a second combination of sub-print data according to the present invention;
FIG. 6 is a flow chart of a method of determining target print data for a second printhead with reference to print data and an accessory ink volume differential value in accordance with the present invention;
FIG. 7 is a flow chart of a first method for adjusting the ink output of the second nozzle according to the present invention;
FIG. 8 is a schematic diagram of the ink outlet condition before the ink quantity adjustment according to the present invention;
FIG. 9 is a schematic diagram of the ink outlet point after the ink amount is adjusted down based on FIG. 8;
FIG. 10 is a flow chart of a second method for adjusting the ink output of a second nozzle according to the present invention;
FIG. 11 is a schematic view of the ink outlet point after the ink level is increased based on FIG. 9;
FIG. 12 is a schematic diagram showing a structure of a print data processing apparatus for improving patch uniformity according to the present application;
fig. 13 is a schematic structural view of a print data processing apparatus of the present application for improving patch uniformity.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It is noted that 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. In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Moreover, 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 phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element. If not conflicting, the embodiments of the present application and the features of the embodiments may be combined with each other, which are all within the protection scope of the present application.
Example 1
As shown in fig. 2, an embodiment of the present invention discloses a print data processing method for improving color patch uniformity, and when the method is adopted, a nozzle for printing an image to be printed includes a first nozzle and at least a second nozzle, and the method includes:
s1: acquiring an ink quantity required by printing an image to be printed by adopting original printing precision as a first printing ink quantity;
the embodiment takes the ink quantity ejected by printing an image with original printing precision as a reference standard, wherein the specific method for acquiring the first printing ink quantity is as follows:
s11: acquiring the volume of each type of ink drop of the printing device;
the ink droplet type in the present embodiment is a type classified by the volume of the ink droplet, that is, the ink droplet of the same volume is one type, and the ink droplets of different volumes are of different types. By controlling the driving waveform of the ejection head, the ejection head of the printing apparatus can eject a plurality of different volumes of ink droplets, for example, the printing apparatus can eject a first type of ink droplet (large ink droplet), a second type of ink droplet (medium ink droplet), and a third type of ink droplet (small ink droplet), wherein the first type of ink droplet has a volume larger than that of the second type of ink droplet, the second type of ink droplet has a volume larger than that of the third type of ink droplet, and the number k of the types of ink droplets in this embodiment can be a positive integer of 2 or more, that is, the ejection head can eject at least two different volumes of ink droplets.
S12: acquiring the number of ink drops of each type for printing an image to be printed by adopting original printing precision;
for example, the printing apparatus can eject the aforementioned first ink droplet, second ink droplet, and third ink droplet, and then find the number N1 of first ink droplets ejected by the head, the number N2 of second ink droplets ejected by the head, and the number N3 of third ink droplets ejected by the head at the time of printing with the original printing accuracy in this step.
S13: the first printing ink quantity is calculated according to the volumes of the ink drops of the respective types and the number of the ink drops of the respective types.
The specific calculation method is that the volume of each type of ink drop is multiplied by the number of the type of ink drop to obtain the printing ink quantity of each type of ink drop, and then the printing ink quantity of all types of ink drops is added to obtain the first printing ink quantity. Taking the foregoing method of ejecting three ink droplets with different volumes by the nozzle as an example, the method of calculating the first printing ink droplet may be: m1=v1×n1+v2×n2+v3×n3, where M1 is the first print ink amount, V1 is the volume of the first ink droplet, V2 is the volume of the second ink droplet, and V3 is the volume of the third ink droplet.
S2: processing an image to be printed according to the nozzle precision to obtain first print data;
The nozzle precision is smaller than the original printing precision of the image to be printed, for example, the original printing precision is 720DPI, and the nozzle precision is 360DPI, and it can be understood that the nozzle precision and the original printing precision can be other values in the embodiment, so long as the nozzle precision is smaller than the original printing precision. Since the head accuracy is smaller than the original printing accuracy, the amount of ink required for printing with the head accuracy is smaller than that for printing with the original accuracy. The method for processing the image to be printed to obtain the first print data may be that the image to be printed is input into color management software, and is processed according to the nozzle precision to obtain the first print data.
S3: splitting the first printing data into a plurality of sub printing data corresponding to each nozzle according to the number of the nozzles;
the method specifically comprises the following steps:
s31: acquiring the number N of spray heads for printing an image to be printed, wherein N is more than or equal to 2;
s32: splitting the first printing data into N parts of sub-printing data;
s33: and distributing the N parts of sub-printing data to N spray heads.
For example, the nozzles for printing an image to be printed are formed by splicing 3 nozzles, namely a nozzle P1, a nozzle P2 and a nozzle P3, wherein the nozzle P1 belongs to a first nozzle, and the nozzle P2 and the nozzle P3 belong to a second nozzle. At this time, the first print data may be split into 3 sub-print data, wherein the 1 st sub-print data is printed by the head P1, the 2 nd sub-print data is printed by the head P2, and the 3 rd sub-print data is printed by the head P3. The method includes the steps that data which is originally printed by a first nozzle is split into N parts of sub-printing data according to the number of spliced nozzles, then the N parts of sub-printing data are distributed to N nozzles for printing, each nozzle distributes one part of sub-printing data, and when the N parts of sub-printing data corresponding to each of the N nozzles are printed. Thus, the first printing data printed according to the nozzle precision is printed by different nozzles, so that the error of the data can be diffused, and the situations of larger error of one nozzle and poor printing effect are effectively avoided.
Wherein S32: splitting the first print data into N sub-print data further comprises the steps of:
s321: obtaining a mask template with the same size as the first printing data;
s322: randomly splitting the first printing data into N parts of sub printing data according to the mask template;
the mask template is a random data splitting template.
As a preferred mode, the first print data is dot matrix data. The above-mentioned lattice data is composed of several data distributed in matrix array, and the positions of these data in the matrix array are lattice positions, for example, the lattice data of first spray head is represented by matrix B with r rows and s columns, and the lattice data of second spray head is represented by matrix C with r rows and s columns, in which data B ij The dot matrix position in the matrix array is the ith row, the jth column, the data C ij The lattice position in the matrix array is also the ith row, jth column, in which case data b ij And data C ij At the same lattice position. The data in the dot matrix data are divided into inking data and non-inking data ifAnd if the data is the ink output data, controlling the nozzle to jet ink, and if the data is the ink output data, controlling the nozzle to output no ink. When the image is processed, the printing equipment firstly processes the image to be printed to obtain dot matrix data of the printed image, and then the spray head is controlled to spray ink at the corresponding position of the printing medium according to the dot matrix data to form the printed image.
At the S3: splitting the first printing data into a plurality of sub printing data corresponding to each spray head according to the number of the spray heads, wherein the sub printing data are dot matrix data, and the dot matrix positions of ink outlet points of each sub printing data are different. By adopting the method, the same point does not exist in each spray head when the first printing data is printed, so that errors can be better diffused, and the printing effect is further improved.
S4: acquiring sub-printing data corresponding to a first nozzle as target printing data of the first nozzle;
and selecting one of the plurality of sub-print data in the split after the first print data is split as target print data of the first nozzle, and printing by the first nozzle.
S5: and determining target printing data of each second nozzle according to the first ink value and the sub-printing data corresponding to each nozzle so that the sum of the printing ink amounts of all the nozzles is equal to the first printing ink amount.
The first printing ink quantity is the ink quantity required by printing an image to be printed by adopting original printing precision, and the target printing data of the second nozzle comprise sub-printing data corresponding to the target printing data.
When the target print data of all the heads are determined, the printing device can control the first head and the second head to print according to the respective target print data.
When the target print data of the first head is determined, the second head performs printing according to the remaining sub print data and the remaining ink amount. Since the target print data of the second head includes sub print data corresponding thereto, the second head prints sub print data printed with the head accuracy on the one hand and accumulates ink amounts on the other hand. The first spray head and the second spray head print according to the sub-printing data printed by the spray head precision respectively, so that the fineness of the image is guaranteed, and errors printed by the spray head precision are diffused, so that the printing errors are reduced. And meanwhile, the second nozzle is used for accumulating the ink quantity, so that the final ink quantity is accumulated to the ink quantity with the original printing precision, and the uniformity of the printed image is ensured. Because the nozzle precision is adopted for printing, the situation that the paper feeding distance is a small number times of the hole spacing is avoided, and the printing precision error caused by the situations of machine paper feeding error, nozzle mounting error, machine shaking error and the like is avoided.
In this embodiment, the paper feeding distance (refresh height of 1 pass) after one scan printing is the length of one head. By adopting the mode, the ink yield of the printing equipment in the subsequent repeated printing process can be maximized, so that the uniformity of images is ensured, and the printing efficiency is improved.
As shown in fig. 3, in the present embodiment, S5: determining target printing data of each second nozzle according to the first ink value and the sub-printing data corresponding to each nozzle so that the sum of the printing ink amounts of all the nozzles is equal to the first printing ink amount, comprising the following steps of;
s51: acquiring sub-printing data corresponding to the first nozzle and sub-printing data corresponding to each second nozzle;
for example, the nozzles for printing an image to be printed are formed by splicing 3 nozzles, namely a nozzle P1, a nozzle P2 and a nozzle P3, wherein the nozzle P1 belongs to a first nozzle, and the nozzle P2 and the nozzle P3 belong to a second nozzle. The first print data can then be split into 3 sub-print data, data1, data2 and data3, respectively. data1 is printed by the head P1, data2 is printed by the head P2, and data3 is printed by the head P3. At this time, the sub-print data2 corresponding to P2, the sub-print data3 corresponding to P3, and the sub-print data1 corresponding to P1 are acquired.
S52: combining the sub-printing data corresponding to each second nozzle with the sub-printing data corresponding to the first nozzle to obtain reference printing data corresponding to each second nozzle;
when the sub-printing data are combined, the sub-printing data corresponding to the nozzle are contained in the reference printing data of each nozzle in the second nozzle, and the sub-printing data originally distributed to the first nozzle can be added to some or each second nozzle according to the requirement to obtain the reference printing data corresponding to the nozzles.
As shown in fig. 4, for example, the foregoing 1 part of sub-print data1 and 1 part of sub-print data2 are combined together to obtain 1 part of new print data, and the print data is used as reference print data corresponding to the nozzle P2, and at the same time, the 1 st part of sub-print data1 and 1 st part of sub-print data3 may be combined together to obtain 1 part of new print data, and the print data is used as reference print data corresponding to the nozzle P3.
For example, a part of sub-print data2 is used as reference print data corresponding to the nozzle P2, and meanwhile, the 2 nd part of sub-print data1 and the 1 st part of sub-print data3 can be combined together to obtain 1 part of new print data, and the print data is used as reference print data corresponding to the nozzle P3.
S53: and determining target printing data of the second nozzle according to the number of nozzles for printing the image to be printed and the reference printing data according to the ink quantity difference.
When the reference print data is determined, the reference print data of the second head is adjusted according to the difference between the amount of ink to be printed using the reference print data and the first amount of ink to be printed, so that the final amount of ink to be printed is the same as the first amount of ink to be printed.
As shown in fig. 6, the step S53: determining target print data of a second head according to the difference in ink amount, the number of heads for printing an image to be printed, and the reference print data, comprising the steps of;
s531: determining the ink quantity required for printing all the sub-printing data as a second ink quantity according to the sub-printing data corresponding to each nozzle;
the method comprises the following steps:
acquiring the volume of each type of ink drop of the printing device;
acquiring the number of ink droplets of each type of all sub-print data:
the second printing ink amount M2 is calculated from the volumes of the respective types of ink droplets and the number of the respective types of ink droplets.
S532: acquiring the ink quantity required by target printing data of a first nozzle to be printed as a reference ink quantity Vr;
the method comprises the following steps:
acquiring the volume of each type of ink drop of the printing device;
Acquiring the number of ink drops of each type in target printing data of a first nozzle:
the reference ink amount Vr is calculated from the volumes of the respective types of ink droplets and the number of the respective types of ink droplets.
S533: acquiring an ink quantity difference Vd of the second printing ink quantity and the first printing ink quantity;
where vd=m1-M2, M1 is a first amount of printing ink, and M2 is a second amount of printing ink.
S534: acquiring the number N of spray heads for printing an image to be printed;
s335: comparing the Vd/Vr with the N-1;
s536: and determining target printing data of the second spray head according to the comparison result and the reference printing data.
Wherein the comparison result includes the following three cases:
as shown in FIG. 7, the first case is (Vd/Vr) < (N-1), and the step S536: determining target print data of the second head according to the comparison result and the reference print data, comprising the following steps:
s3564: if (Vd/Vr) < (N-1), selecting at least one spray head from the second spray heads as an adjusting spray head;
this step divides the second head into an adjusted head and a non-adjusted head (heads other than the adjusted head in the second head), wherein the number of adjusted heads may be one or a plurality, but does not exceed the total number of the second heads.
S3565: reducing the ink quantity of the reference printing data corresponding to the adjusting nozzle to obtain target printing data corresponding to the adjusting nozzle;
the specific adjustment method may be to adjust some of the ink output data in the reference print data to non-ink output data and obtain the target print data.
For example, when the ink droplets ejected from the printing apparatus include a first ink droplet, a second ink droplet, and a third ink droplet, wherein the volume of the first ink droplet is larger than the volume of the second ink droplet, and the volume of the second ink droplet is larger than the volume of the third ink droplet, the data of the ink ejected from the third ink droplet in the reference print data may be modified to be the non-ejected data, and the target print data may be obtained.
As shown in fig. 8 and 9, each hatched circle in fig. 8 and 9 represents an ink dot of the ink jet head, wherein the largest circle is an ink dot formed by the first ink droplet, the smallest circle is an ink dot formed by the second ink droplet, and the second largest circle is an ink dot formed by the second ink droplet. The target print data obtained by the data adjustment method can enable the second nozzle to jet the first ink drop at the position where the first ink drop is jetted by the reference print data, jet the second ink drop at the position where the second ink drop is jetted by the reference print data, and not jet the ink at the position where the third ink drop is jetted by the reference print data.
In addition, at least a part of the dot matrix data of the first nozzle adopting the larger volume of ink drop out ink can be adjusted to the data adopting the smaller volume of ink drop out ink to be used as the dot matrix data of the adjusting nozzle. The ink amount is adjusted in such a way that the final printed ink drop is equal to the first printed ink amount.
S3566: and taking the reference printing data corresponding to the rest of the spray heads in the second spray head as target printing data corresponding to the rest of the spray heads.
The rest of the second heads, i.e., the non-adjusted heads, may directly print using the reference print data. In the foregoing case, the second heads repeatedly print the print data of the first heads in addition to the sub-print data processed in accordance with the head accuracy, and the ink output amounts of some of the second heads are adjusted down so that the total ink amount finally printed is equal to the first ink amount.
As shown in fig. 10, the second case is:
(Vd/Vr) > (N-1), when said S536: determining target print data of the second head according to the comparison result and the reference print data, comprising the following steps:
s3561: if (Vd/Vr) > (N-1), selecting at least one nozzle from the second nozzle as an adjusting nozzle;
this step divides the second head into an adjusted head and a non-adjusted head (heads other than the adjusted head in the second head), wherein the number of adjusted heads may be one or a plurality, but does not exceed the total number of the second heads.
S3562: the ink quantity of the reference printing data corresponding to the adjusting nozzle is improved to obtain target printing data corresponding to the adjusting nozzle;
the specific adjustment method may be that at least a part of dot matrix data of the first nozzle adopts data of ink droplets with a smaller volume to adjust to data of ink droplets with a larger volume, and then the data is used as dot matrix data of the adjustment nozzle.
For example, when the ink droplets ejected by the printing apparatus include a first ink droplet, a second ink droplet, and a third ink droplet, wherein the volume of the first ink droplet is larger than the volume of the second ink droplet, and the volume of the second ink droplet is larger than the volume of the third ink droplet, the data of the third ink droplet may be adjusted to the data of the second ink droplet or the data of the first ink droplet, or the data of the second ink droplet may be adjusted to the data of the first ink droplet.
As shown in fig. 9 and 11, the largest circle in fig. 11 is the dot formed by the first ink droplet, and the second largest circle is the dot formed by the second ink droplet. The data adjusted by the steps can enable the second nozzle to jet the first ink drop with larger volume at the position of the second ink drop with medium original jet volume, thereby improving the whole printing ink quantity of the second nozzle and enabling the total ink quantity printed by all the nozzles to reach the ink quantity with original printing precision. The ink amount is adjusted in such a way that the final printed ink drop is equal to the first printed ink amount.
S3563: and taking the reference printing data corresponding to the rest of the spray heads in the second spray head as target printing data corresponding to the rest of the spray heads.
The rest of the second heads, i.e., the non-adjusted heads, may directly print using the reference print data. In the foregoing case, the second heads repeatedly print the print data of the first heads in addition to the sub-print data processed in accordance with the head accuracy, and the ink output amounts of some of the second heads are adjusted to be high so that the total ink amount finally printed is equal to the first ink amount.
The third case is:
at S536: and determining the target printing data of the second spray heads according to the comparison result and the reference printing data, and taking the reference printing data corresponding to each second spray head as the target printing data corresponding to each second spray head if (Vd/Vr) = (N-1).
In the foregoing case, the second head repeatedly prints the print data of the first head in addition to the allocated sub print data.
Example 2
Referring to fig. 12, the present embodiment provides a print data processing apparatus for improving color patch uniformity, including:
a first printing ink quantity acquisition module for acquiring, as a first printing ink quantity, an ink quantity required for printing an image to be printed with original printing accuracy;
The image processing module is used for processing the image to be printed according to the nozzle precision to obtain first print data;
the data splitting module is used for splitting the first printing data into a plurality of sub printing data corresponding to each spray head according to the number of the spray heads;
the first nozzle printing data acquisition module is used for acquiring sub-printing data corresponding to the first nozzle as target printing data of the first nozzle;
and the second nozzle printing data determining module is used for determining target printing data of each second nozzle according to the first ink value and the sub-printing data corresponding to each nozzle so that the sum of the printing ink amounts of all the nozzles is equal to the first printing ink amount.
The first printing ink quantity is the ink quantity required by printing an image to be printed by adopting original printing precision, and the target printing data of the second nozzle comprise sub-printing data corresponding to the target printing data.
The second head print data determination module further includes:
the sub-printing data acquisition sub-module is used for acquiring sub-printing data corresponding to the first spray heads and sub-printing data corresponding to each second spray head;
The reference printing data acquisition sub-module is used for combining the sub-printing data corresponding to each second nozzle with the sub-printing data corresponding to the first nozzle to obtain the reference printing data corresponding to each second nozzle;
and the second nozzle target printing data determining submodule is used for determining target printing data of the second nozzle according to the nozzle number for printing the image to be printed and the reference printing data according to the ink quantity difference value.
Example 3
In addition, the print data processing method of improving the patch uniformity of the embodiment of the present invention described in connection with fig. 13 may be implemented by a print data processing apparatus that improves the patch uniformity. Fig. 13 is a schematic diagram showing a hardware configuration of a print data processing apparatus for improving patch uniformity provided by an embodiment of the present invention.
The print data processing apparatus that improves patch uniformity may include a processor 401 and a memory 402 in which computer program instructions are stored.
In particular, the processor 401 described above may include a Central Processing Unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured as one or more integrated circuits implementing embodiments of the present invention.
Memory 402 may include mass storage for data or instructions. By way of example, and not limitation, memory 402 may comprise a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, magnetic tape, or universal serial bus (Universal Serial Bus, USB) Drive, or a combination of two or more of the foregoing. Memory 402 may include removable or non-removable (or fixed) media, where appropriate. Memory 402 may be internal or external to the data processing apparatus, where appropriate. In a particular embodiment, the memory 402 is a non-volatile solid state memory. In a particular embodiment, the memory 402 includes Read Only Memory (ROM). The ROM may be mask programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these, where appropriate.
The processor 401 implements the data addressing method of random area printing in any of the above embodiments by reading and executing computer program instructions stored in the memory 402.
The print data processing device that improves patch uniformity in one example may also include a communication interface 403 and a bus 410. As shown in fig. 6, the processor 401, the memory 402, and the communication interface 403 are connected by a bus 410 and perform communication with each other.
The communication interface 403 is mainly used to implement communication between each module, device, unit and/or apparatus in the embodiment of the present invention.
Bus 410 includes hardware, software, or both, coupling components for fractional ink volume output to each other. By way of example, and not limitation, the buses may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a micro channel architecture (MCa) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus, or a combination of two or more of the above. Bus 410 may include one or more buses, where appropriate. Although embodiments of the invention have been described and illustrated with respect to a particular bus, the invention contemplates any suitable bus or interconnect.
Example 4
In addition, in combination with the print data processing method for improving color patch uniformity in the above embodiment, embodiments of the present invention may be implemented by providing a computer readable medium. The computer readable medium has stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement any of the print data processing methods of the above embodiments to improve patch uniformity.
The foregoing is a detailed description of a print data processing method, apparatus, device, and medium for improving color patch uniformity provided by embodiments of the present invention.
It should be understood that the invention is not limited to the particular arrangements and instrumentality described above and shown in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. 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 shown, and those skilled in the art can make various changes, modifications and additions, or change the order between steps, after appreciating the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented in 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, a plug-in, a 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 over transmission media or communication links by a data signal carried in a carrier wave. A "machine-readable medium" may include any medium that can store or transfer information. Examples of machine-readable media include electronic circuitry, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio Frequency (RF) links, and the like. 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 disclosure 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, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.
In the foregoing, only the specific embodiments of the present invention are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present invention is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and they should be included in the scope of the present invention.

Claims (10)

1. A print data processing method for improving patch uniformity, wherein a head for printing comprises a first head and at least a second head, the method comprising:
S1: acquiring an ink quantity required by printing an image to be printed by adopting original printing precision as a first printing ink quantity;
s2: processing an image to be printed according to the nozzle precision to obtain first print data;
s3: splitting the first printing data into a plurality of sub printing data corresponding to each nozzle according to the number of the nozzles;
s4: acquiring sub-printing data corresponding to a first nozzle as target printing data of the first nozzle;
s5: determining target printing data of each second nozzle according to the ink value of the first printing ink quantity and the sub-printing data corresponding to each nozzle so that the sum of the printing ink quantities of all the nozzles is equal to the first printing ink quantity;
the target printing data of the second nozzle comprise sub-printing data corresponding to the target printing data;
and the nozzle precision is smaller than the original printing precision of the image to be printed.
2. The print data processing method for improving color patch uniformity according to claim 1, wherein said S5: determining target printing data of each second nozzle according to the ink value of the first printing ink quantity and the sub-printing data corresponding to each nozzle so that the sum of the printing ink quantities of all the nozzles is equal to the first printing ink quantity, comprising the following steps of;
S51: acquiring sub-printing data corresponding to the first nozzle and sub-printing data corresponding to each second nozzle;
s52: combining the sub-printing data corresponding to each second nozzle with the sub-printing data corresponding to the first nozzle to obtain reference printing data corresponding to each second nozzle;
s53: and determining target printing data of the second nozzle according to the difference between the second printing ink quantity and the first printing ink quantity, the number of nozzles used for printing the image to be printed and the reference printing data, wherein the second printing ink quantity is the ink quantity required for printing all the sub-printing data determined according to the sub-printing data corresponding to each nozzle.
3. The print data processing method for improving color patch uniformity according to claim 2, wherein said S53: determining target print data of the second head according to the difference between the second print ink amount and the first print ink amount, the number of heads for printing the image to be printed, and the reference print data, comprising the steps of;
s531: acquiring the ink quantity required by target printing data of a first nozzle to be printed as a reference ink quantity Vr;
s532: acquiring an ink quantity difference Vd of the second printing ink quantity and the first printing ink quantity;
s533: acquiring the number N of spray heads for printing an image to be printed;
S334: comparing the Vd/Vr with the N-1;
s535: determining target printing data of the second nozzle according to the comparison result and the reference printing data;
wherein N is a positive integer greater than or equal to 2.
4. The print data processing method for improving color patch uniformity according to claim 3, wherein said S535: determining target print data of the second head according to the comparison result and the reference print data, comprising the following steps:
s5351: if (Vd/Vr) > (N-1), selecting at least one nozzle from the second nozzle as an adjusting nozzle;
s5352: the ink quantity of the reference printing data corresponding to the adjusting nozzle is improved to obtain target printing data corresponding to the adjusting nozzle;
s5353: and taking the reference printing data corresponding to the rest of the spray heads in the second spray head as target printing data corresponding to the rest of the spray heads.
5. A print data processing method for improving patch uniformity according to claim 3, wherein: the step S535: determining target print data of the second head according to the comparison result and the reference print data, comprising the following steps:
s53501: if (Vd/Vr) < (N-1), selecting at least one spray head from the second spray heads as an adjusting spray head;
S53502: reducing the ink quantity of the reference printing data corresponding to the adjusting nozzle to obtain target printing data corresponding to the adjusting nozzle;
s53503: and taking the reference printing data corresponding to the rest of the spray heads in the second spray head as target printing data corresponding to the rest of the spray heads.
6. The print data processing method for improving color patch uniformity according to claim 5, wherein at said S535: and determining the target printing data of the second spray heads according to the comparison result and the reference printing data, and taking the reference printing data corresponding to each second spray head as the target printing data corresponding to each second spray head if (Vd/Vr) = (N-1).
7. The print data processing method for improving color patch uniformity according to any one of claims 1 to 6, wherein the first print data is dot matrix data, and at S3: splitting the first printing data into a plurality of sub printing data corresponding to each spray head according to the number of the spray heads, wherein the sub printing data are dot matrix data, and the dot matrix positions of ink outlet points of each sub printing data are different.
8. A print data processing apparatus for improving uniformity of color patches, comprising:
A first printing ink quantity acquisition module for acquiring, as a first printing ink quantity, an ink quantity required for printing an image to be printed with original printing accuracy;
the image processing module is used for processing the image to be printed according to the nozzle precision to obtain first print data;
the data splitting module is used for splitting the first printing data into a plurality of sub printing data corresponding to each spray head according to the number of the spray heads;
the first nozzle printing data acquisition module is used for acquiring sub-printing data corresponding to the first nozzle as target printing data of the first nozzle;
the second nozzle print data determining module is used for determining target print data of each second nozzle according to the ink value of the first print ink quantity and the sub print data corresponding to each nozzle so that the sum of the print ink quantities of all the nozzles is equal to the first print ink quantity;
the target printing data of the second nozzle comprise sub-printing data corresponding to the target printing data;
and the nozzle precision is smaller than the original printing precision of the image to be printed.
9. A print data processing apparatus that improves patch uniformity, 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 1-7.
10. A medium having stored thereon computer program instructions, which when executed by a processor, implement the method of any of claims 1-7.
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