CN117341362A

CN117341362A - Printing method, device and equipment for eliminating image chromatic aberration

Info

Publication number: CN117341362A
Application number: CN202311138640.4A
Authority: CN
Inventors: 何伟; 陈艳
Original assignee: Shenzhen Hansen Software Co ltd
Current assignee: Shenzhen Hansen Software Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2024-01-05
Also published as: CN115447284A; CN115447284B

Abstract

The invention belongs to the technical field of printing, and provides a printing method, device and equipment for eliminating image chromatic aberration. The printing method for eliminating the image chromatic aberration 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: acquiring an ink quantity required by printing an image to be printed by adopting the nozzle precision as a second printing ink quantity; s3: acquiring position information of nozzles of the inkjet color uniformity portion; s4: and determining the stepping distance of the spray head after one-time scanning printing according to the position information and the ink quantity difference value. S5: and controlling at least one part of nozzles of the nozzle with uniform inkjet color to print according to the nozzle precision, and printing other nozzles according to the dot matrix position printed by adopting the nozzle precision. The invention also comprises a device and equipment for executing the method. The invention can eliminate the image chromatic aberration of the printed image caused by the difference of the nozzles in the spray head.

Description

Printing method, device and equipment for eliminating image chromatic aberration

The application is a printing method, a device, equipment and a storage medium for eliminating chromatic aberration of a spray head, which are submitted by 2021, 6 and 8 days, and has the application number of: division of the invention patent application of 202110638055.5.

Technical Field

The present invention relates to the field of inkjet printing technology, and in particular, to a printing method, apparatus and device for eliminating image chromatic aberration.

Background

Currently, in the operation of industrial inkjet printers, a printer nozzle ejects ink drops onto a print medium to form images or text. As shown in fig. 1a, in order to satisfy high-precision and high-efficiency printing, an inkjet printhead is generally composed of a plurality of rows of nozzles, however, an image printed by one head may have a color difference problem due to manufacturing variation of each nozzle, as shown in fig. 1 c; meanwhile, in order to improve the printable height of the spray heads in one scanning, a spray head manufacturer designs spray heads as shown in fig. 1b, each spray head in fig. 1b is formed by splicing 4 small rows of spray nozzles (1, 2, 3 and 4), and the color difference problem of inconsistent colors exists in images printed by each row of spray nozzles due to manufacturing differences of each spray nozzle. In the prior art, the color difference of the spray heads is adjusted by pressure adjustment, the integral pressure adjustment can be carried out only for one spray head or one row of spray nozzles, the adjustment can not be carried out for one spray nozzle or a plurality of spray nozzles, and the problem of the color difference of the printed image caused by different characteristics of part of spray nozzles still exists.

Disclosure of Invention

In view of the above, the embodiments of the present invention provide a printing method, apparatus and device for eliminating chromatic aberration of an image, so as to solve the technical problem of chromatic aberration of a printed image caused by the difference of each nozzle in a nozzle in the prior art.

The technical scheme adopted by the invention is as follows:

in a first aspect, the present invention provides a printing method of removing chromatic aberration of an image, 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: acquiring an ink quantity required by printing an image to be printed by adopting the nozzle precision as a second printing ink quantity;

s3: acquiring position information of a nozzle of an ink-jet color uniform part in a nozzle;

s4: determining the stepping distance of the spray head after one-time scanning printing according to the position information and the ink quantity difference value of the first printing ink quantity and the second printing ink quantity;

s5: and controlling at least one part of nozzles of the nozzle with uniform inkjet color in the nozzle according to the stepping distance and the position information, printing according to the nozzle precision, and printing according to the dot matrix position printed by the nozzle precision by the other nozzles.

Preferably, the step S3: acquiring the position information of the nozzles of the inkjet color uniformity part in the nozzle further comprises the following steps;

s31: controlling the spray head to print the test chart and then scanning the obtained test chart;

s32: obtaining the position of each nozzle with chromatic aberration through a test chart obtained by scanning and printing;

Preferably, the nozzle precision is smaller than the original printing precision of the image to be printed.

Preferably, the step S4: determining a stepping distance of the nozzle after one-time scanning printing according to the position information and the ink quantity difference value of the first printing ink quantity and the second printing ink quantity, wherein the stepping distance comprises the following steps:

s41: acquiring an ink quantity difference Vd of the second printing ink quantity and the first printing ink quantity;

s42: acquiring an initial stepping distance according to the length of the spray head, the second printing ink quantity and the ink quantity difference value;

s43: determining the length L2 of the ink-jet color-uniform portion in the nozzle according to the position information of the nozzle of the ink-jet color-uniform portion;

s44: comparing the initial stepping distance D1 with the length L2 of the uniform ink-jet color part in the nozzle;

s45: and determining the stepping distance of the spray head after one-time scanning printing according to the comparison result.

Preferably, in said S42: and calculating an initial stepping distance according to a formula D1=1/(Vd/Vr+1) x L1 in the initial stepping distance according to the length of the spray head, the second printing ink quantity and the ink quantity difference value, wherein L1 is the length of the spray head, D1 is the initial stepping distance, and Vr is the second printing ink quantity.

Preferably, the step S45: determining the stepping distance of the spray head after one-time scanning printing according to the comparison result comprises the following steps:

S451: if the initial step distance D1 is smaller than or equal to the length L2 of the uniform part of the ink jet color in the nozzle, taking the initial step distance D1 as the step distance after the nozzle scans and prints once;

s452: if the initial step distance D1 is larger than the length L2 of the ink-jet color-uniform portion in the nozzle, the length L2 of the ink-jet color-uniform portion in the nozzle is used as the step distance after the nozzle scans and prints once.

Preferably, if the initial step distance D1 is equal to or less than the length L2 of the ink-jet color uniformity portion in the ejection head, the step S5 includes the steps of:

s51: selecting at least one part of nozzles from the nozzles of the ink-jet color uniformity part as a first group of nozzles according to the stepping distance and the position information, and using the rest of nozzles of the spray head as a second group of nozzles;

s52: controlling the first group of nozzles to print according to the nozzle precision;

s53: acquiring printing data printed by a first group of nozzles as first printing data;

s54: the second set of nozzles is controlled to repeat printing according to the first print data.

Preferably, the ink droplets ejected from the printing apparatus include a first ink droplet, a second ink droplet, and a third ink droplet, wherein the first ink droplet has a volume larger than that of the second ink droplet, and the second ink droplet has a volume larger than that of the third ink droplet, and the S5 includes the steps of, if the initial step distance D1 is equal to or smaller than the length L2 of the ink-ejection color uniformity portion in the ejection head:

S501: selecting at least one part of nozzles from the nozzles of the ink-jet color uniformity part as a first group of nozzles according to the stepping distance and the position information, and using the rest of nozzles of the spray head as a second group of nozzles;

s502: controlling the first group of nozzles to print according to the nozzle precision;

s503: acquiring printing data printed by a first group of nozzles as first printing data;

s504: the first intermediate printing data is obtained after the data of the third ink drop in the first printing data is adjusted to be the non-ink data;

s505: acquiring the ink quantity printed by the second group of nozzles by adopting the first intermediate printing data as a third printing ink quantity;

s506: comparing a third amount of printing ink to the amount of ink difference;

s507: obtaining second printing data according to the comparison result of the first intermediate printing data and the difference value between the third printing ink quantity and the ink quantity;

s508: controlling the second group of nozzles to print according to the second printing data;

if the initial step distance D1 is greater than the length L2 of the ink-jet color uniformity portion in the nozzle, said S5 comprises the steps of:

s510: selecting nozzles of the ink-jet color uniformity part as a third group of nozzles according to the position information, wherein the rest nozzles of the spray head are used as the rest nozzles and are used as four groups of nozzles;

S520: controlling the third group of nozzles to print according to the nozzle precision;

s530: acquiring print data printed by a third group of nozzles as third print data;

s540: the data of the third printing data, which adopts the third ink drop to discharge ink, is adjusted to be the non-ink discharge data, and second intermediate printing data are obtained;

s550: acquiring the ink quantity printed by the second group of nozzles by adopting the second intermediate printing data as a fourth printing ink quantity;

s560: comparing a fourth amount of printing ink with the amount of ink difference;

s570: obtaining third printing data according to the comparison result of the second intermediate printing data and the fourth printing ink quantity and the ink quantity difference value;

s580: and controlling the fourth group of nozzles to print according to the third printing data.

In a second aspect, the present invention also provides a printing apparatus for removing chromatic aberration of an image, 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 second printing ink quantity acquisition module is used for acquiring the ink quantity required by printing the image to be printed by adopting the nozzle precision as a second printing ink quantity;

A position information acquisition module for acquiring position information of nozzles of the inkjet color uniformity portion in the inkjet head;

the stepping distance determining module is used for determining the stepping distance of the spray head after one-time scanning printing according to the position information and the ink quantity difference value of the first printing ink quantity and the second printing ink quantity;

and the control module is used for controlling at least one part of nozzles with uniform inkjet colors in the spray heads to print according to the spray head precision according to the stepping distance and the position information, and the rest of nozzles print according to the dot matrix position printed by adopting the spray head precision.

In a third aspect, the present invention also provides a printing apparatus that removes chromatic aberration of an image, 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.

The beneficial effects are that: the printing method, the printing device and the printing equipment for eliminating the image chromatic aberration divide the spray heads into a first spray head for printing according to the spray head precision and a second spray head for accumulating ink. The invention prints by utilizing the nozzles of the part with uniform ink-jet color in the spray head according to the spray head precision, and the rest nozzles print repeatedly only according to the dot matrix position printed by adopting the spray head precision, thus ensuring the fineness of the image, eliminating the defect of nonuniform color of the printed image caused by inconsistent nozzles in the spray head, and simultaneously keeping the same printing ink quantity. Because the nozzle precision is adopted for printing, the situation that the paper feeding distance is a small number times of hole spacing is avoided, and therefore the printing progress dislocation caused by the situations of machine paper feeding errors, nozzle mounting errors, machine shaking errors and the like can be prevented. In addition, the invention uses partial nozzles of the spray head to print according to the spray head precision, and combines the repeated printing of other nozzles at the same position so that the ink quantity reaches the original printing precision, thereby obviously improving the uniformity of the printed image.

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. 1a is a schematic diagram of a printer head;

FIG. 1b is a schematic diagram of a printer head spliced by four rows of small nozzles;

FIG. 1c is a print test chart for acquiring nozzle color difference information;

FIG. 2 is a flow chart of a printing method for eliminating image chromatic aberration according to the present invention;

FIG. 3 is a flow chart of a method of determining a step distance according to the present invention;

FIG. 4 is a schematic view of the length of the spray head and the sequencing of the nozzles of the present invention;

FIG. 5 is a flow chart of a first method of controlling a printhead to print according to the present invention;

FIG. 6 is a flow chart of a second method for controlling a printhead to print according to the present invention;

FIG. 7 is a schematic diagram of the ink discharge of the nozzle during the precision printing of the installed nozzle;

FIG. 8 is a schematic diagram of an ink outlet of a nozzle according to the present invention;

FIG. 9 is a schematic diagram of another embodiment of the present invention for adjusting the ink outlet of the nozzle;

FIG. 10 is a flow chart of a third method for controlling a printhead to print according to the present invention;

FIG. 11 is a schematic illustration of multiple pass steps in printing with a nozzle of the initial uniform section in accordance with the present invention;

FIG. 12 is a schematic diagram showing a configuration of a printing apparatus for eliminating image chromatic aberration according to the present invention;

fig. 13 is a schematic structural view of a printing apparatus of the present invention for eliminating image chromatic aberration.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. 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 invention, 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 description of 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 invention. 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 invention and the features of the embodiments may be combined with each other, which are all within the protection scope of the present invention.

Example 1

As shown in fig. 2, an embodiment of the present invention discloses a printing method for eliminating chromatic aberration of an image, the method comprising:

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 types in this embodiment are those classified by the volumes of the ink droplets, that is, the ink droplets of the same volume are 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.

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. Wherein the specific step of obtaining the second printing ink amount is;

s21: acquiring the volume of each type of ink drop of the printing device;

s22: acquiring the number of ink drops of each type printed by adopting the nozzle precision;

for example, three types of ink droplets, i.e., a first type of ink droplet, a second type of ink droplet, and a third type of ink droplet, are ejected when printing is performed according to the head schedule, and the number of one type of ink droplets ejected by the head, the number of second type of ink droplets ejected by the head, and the number of third type of ink droplets ejected by the head are found in this step when printing is performed with the head accuracy.

S23: and calculating a second printing ink quantity 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 second printing ink quantity.

as shown in fig. 1c, although the entire nozzle head may have uneven ink jet color, a nozzle with even ink jet color may be present in a local area of the nozzle head (e.g., an area A1 in the drawing), so that the nozzle with even ink jet color in this step refers to an area where several consecutive nozzles with even ink jet color are located in the nozzle head, and the position information of the nozzle located in the area may be represented by the number of the nozzle in the nozzle head, for example, in fig. 4, the position of the fourth nozzle located in the length direction of the nozzle head may be represented by the number 4 in the drawing.

The method in which the positional information of the nozzles of the inkjet color uniformity portion is acquired can be realized by making a test chart. Specifically, the spray heads are controlled to print a test chart (shown in figure 1 c), then the position and the color difference condition of each spray head with color difference are obtained through the test chart obtained through scanning printing,

S4: and determining the stepping distance of the spray head after one-time scanning printing according to the position information and the ink quantity difference value of the first printing ink quantity and the second printing ink quantity.

Shuttle scan printing is also known as multipass scan printing. The multipass scanning printing is to realize multiple interpolation of each unit of an image to be printed by using the alternation of a nozzle head in a scanning direction perpendicular to a nozzle arrangement direction and a stepping direction parallel to the nozzle arrangement direction. In the multiple pass scanning printing, the nozzle moves a certain distance along the stepping direction relative to the printing medium after finishing the scanning printing along the scanning direction, and then the distance is the stepping distance after the next scanning printing.

In the multiple pass scanning printing, each unit needs to be subjected to multiple coverage printing, and if the multiple pass scanning printing is performed, each unit needs to be subjected to 2 coverage printing to complete printing of a unit area; 3pass scan printing requires 3 times of coverage printing to finish printing of a unit area; the 4pass scan printing can complete the printing of a unit area every 4 times of coverage printing.

Wherein the S4: determining a stepping distance of the nozzle after one-time scanning printing according to the position information and the ink quantity difference value of the first printing ink quantity and the second printing ink quantity, and further comprising the following steps:

the method for calculating the ink quantity difference value comprises the following steps: vd=m1 to M2, where M1 is a first printing ink amount and M2 is a second printing ink amount.

S42: calculating an initial step distance according to the formula d1=1/(Vd/vr+1) ×l1, wherein L1 is a head length, D1 is the initial step distance, and Vr is a second printing ink amount;

as shown in fig. 4, the length of the head means the distance between the first nozzle center of the head and the last nozzle center of the head in the direction of nozzle arrangement, i.e., the x direction (direction perpendicular to the scanning direction of the head, y direction in fig. 10) in fig. 4, and for example, the distance between two adjacent nozzles in fig. 4 is d, and the length of the head having 10 nozzles is 9d. For the sake of calculation, the head length may be expressed by the number of nozzles of the head in the nozzle arrangement direction, for example, the aforementioned head length of 9d (corresponding to 10 nozzles) may be expressed as a head length of 9 (corresponding to 10 nozzles), wherein the number is the number of nozzles of the head in the nozzle arrangement direction.

the method comprises the following specific steps:

S331: acquiring a minimum nozzle number N1 and a maximum nozzle number N2 of an ink-jet color uniform part in the spray head according to the position information;

for example, in the figures, nozzles numbered 1 to 5 are nozzles for ejecting ink in a uniform color portion of the head, and n1=1, n2=5.

S332: the length L2 of the ink-jet color uniformity portion in the head is calculated according to the formula l2= (N2-N1) x d, where d is the distance between two adjacent nozzles.

In order to complete the portion printed with the head accuracy by the nozzles which are uniform in ink ejection, the present embodiment compares the initial step distance D1 with the length L2 of the portion of uniform in ink ejection color in the head, and then determines the step distance to be finally used for printing based on the result of the comparison.

The S45: the step distance after the one-time scanning printing of the spray head is determined according to the comparison result comprises the following steps:

The printing equipment firstly processes the image to be printed to obtain dot matrix data of the printed image, and then controls the spray head to spray ink at the corresponding position of the printing medium according to the dot matrix data to form the printed image.

Because the ink jet is completed by the nozzle, the dot matrix data used for controlling the nozzle to jet ink is the dot matrix data corresponding to the nozzle. When the dot matrix data of the ejection head is determined, the amount of printing ink of the ejection head at the time of printing is also determined. The amount of ink printed by the ejection head can be adjusted by adjusting the dot matrix data. The formula for calculating the ink amount difference in this step is vd=m1-M2, where M1 is the first printing ink amount and M2 is the second printing ink amount.

When the nozzles with uniform ink jet colors, which are printed with the nozzle accuracy, are installed, the printing data corresponding to the nozzles can be obtained by processing the image to be printed, and the data obtained by processing the image to be printed is dot matrix data. The lattice data is composed of a plurality of data distributed in matrix array, the positions of the data in the matrix array are lattice positions, for example, using matrix with r rows and s columns Matrix B represents the dot matrix data of the first nozzle, e.g. matrix C with r rows and s columns represents the dot matrix data of the second nozzle, where 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 ink output data and non-ink output data, if the data are the ink output data, the nozzle is controlled to jet ink, and if the data are the non-ink output data, the nozzle is controlled not to output ink. The dot matrix position printed by the spray head refers to the dot matrix position of the ink output data in the dot matrix data of the spray head. The fact that the other nozzles print according to the dot matrix positions printed by the nozzle precision means that if the ink jet colors are uniform and the data of a certain dot matrix position of the nozzle printed by the nozzle precision is not ink-out data, the data of the same dot matrix position of the other nozzles is also not ink-out data; if the ink jet color is uniform and the data of a certain dot matrix position of the nozzle printed by adopting the nozzle head precision is the ink output data, the data of the same dot matrix position of the rest nozzles can be the ink output data or the non-ink output data. That is, the dot matrix positions printed by the rest of the nozzles can only be selected from the dot matrix positions of the nozzles which are uniform in inkjet color and printed with the nozzle head precision. Because the dot matrix positions of the ink output data are in one-to-one correspondence with the positions of the nozzles for ejecting ink on the printing medium, the rest nozzles only eject ink at the positions of the nozzles with uniform ink ejection color and adopting nozzle precision printing.

In the embodiment, the nozzles of the part with uniform ink-jet color in the spray head are used for printing according to the spray head precision, and the rest of the nozzles are used for repeatedly printing according to the dot matrix position printed by adopting the spray head precision, so that the fineness of an image is ensured, the defect of nonuniform color of the printed image caused by inconsistent nozzles in the spray head is eliminated, and meanwhile, the same printing ink quantity is maintained. Because the nozzle precision is adopted for printing, the situation that the paper feeding distance is a small number times of hole spacing is avoided, and therefore the printing progress dislocation caused by the situations of machine paper feeding errors, nozzle mounting errors, machine shaking errors and the like can be prevented. In addition, the invention uses partial nozzles of the spray head to print according to the spray head precision, and combines the repeated printing of other nozzles at the same position so that the ink quantity reaches the original printing precision, thereby obviously improving the uniformity of the printed image.

Example 2

As shown in fig. 5, when the initial step distance D1 is equal to or smaller than the length L2 of the ink-jet color uniformity portion in the head, S5: according to the stepping distance and the position information, controlling at least one part of nozzles of the inkjet color uniform part in the nozzle to print according to the nozzle precision, wherein the other nozzles are specifically introduced according to one of the methods for printing according to the dot matrix position printed by the nozzle precision, and the method comprises the following steps:

since the initial step distance D1 is equal to or smaller than the length L2 of the ink-jet color-uniformity portion of the nozzle, the initial step distance D1 is used as the step distance after the nozzle performs scanning printing once, a part of continuous nozzles can be selected from the nozzles of the ink-jet color-uniformity portion to mount the nozzle for printing with precision, and the rest of the nozzles perform repeated printing.

For example, in fig. 4, nozzles numbered 1 to 5 are nozzles of the ink-jet color uniformity portion, and if the initial distance D1 is 3D, nozzles numbered 1 to 4 may be selected as the first group of nozzles and nozzles numbered 5 to 10 may be selected as the second group of nozzles.

that is, the nozzles with uniform color of the screened ink jet are controlled to print the image according to the nozzle precision.

and processing the image to be printed according to the nozzle precision to obtain dot matrix data printed according to the nozzle precision, and acquiring the printing data which belongs to the first group of nozzles from the dot matrix data, namely the first printing data.

I.e. control the remaining nozzles to repeatedly print the print data of the first set of nozzles.

Example 3

As shown in fig. 6, in the present embodiment, the ink droplets ejected by the printing apparatus include a first ink droplet, a second ink droplet, and a third ink droplet, wherein the first ink droplet has a volume larger than that of the second ink droplet, and the second ink droplet has a volume larger than that of the third ink droplet.

In this embodiment, when the initial step distance D1 is equal to or smaller than the length L2 of the ink-jet color uniformity portion in the head, S5: according to the stepping distance and the position information, controlling at least one part of nozzles of the inkjet color uniform part in the nozzle to print according to the nozzle precision, and the other nozzles are specifically introduced according to another method for printing according to the dot matrix position printed by adopting the nozzle precision, wherein the method comprises the following steps:

since the initial step distance D1 is equal to or smaller than the length L2 of the ink-jet color-uniformity portion in the head, the initial step distance D1 is used as the step distance after the head scans once, so that a part of continuous nozzles can be selected from the nozzles of the ink-jet color-uniformity portion to print according to the head accuracy, and the rest of the nozzles can print repeatedly.

the first set of nozzles ejects three different volumes of ink drops, namely, a first ink drop, a second ink drop and a third ink drop, when printing according to the nozzle precision. In order to improve printing efficiency while ensuring printing uniformity, the second head ejects first ink droplets and second ink droplets having relatively large volumes in printing, without ejecting third ink droplets having smaller volumes.

As shown in fig. 7 and 8, each hatched circle in fig. 7 and 8 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 first intermediate dot matrix data obtained by the data adjustment mode can enable the second group of nozzles to jet the first ink drops at the positions where the first group of nozzles jet the first ink drops, jet the second ink drops at the positions where the first group of nozzles jet the second ink drops, and prevent the ink from being discharged at the positions where the first group of nozzles jet the third ink drops, so that the printed image is uniform.

in this step, the ink amounts at the time of printing using only the first ink droplet and the second ink droplet having larger volumes are calculated as the third printing ink amount.

S506: comparing a third amount of printing ink to the amount of ink difference;

if the third printing ink amount is smaller than the ink amount difference value, the ink amount is indicated to be insufficient, otherwise, the ink amount is indicated to be sufficient. If the ink volume is insufficient, a portion of the second ink droplets are converted into first ink droplets. As shown in fig. 8 and 9, the largest circle in fig. 9 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 group of nozzles to jet the first ink drops with larger volumes at the positions of the second ink drops with medium original jet volumes, thereby improving the whole printing ink quantity of the second group of nozzles and enabling the total ink quantity printed by all the spray heads to reach the ink quantity with original printing precision.

When the ink amount is not enough, a part of the third ink drops are replenished to obtain second printing data. The first intermediate print data is directly made as the second print data if the ink amount is sufficient.

S508: the second set of nozzles is controlled to print according to the second print data.

After the second print data is determined, the second set of nozzles may be controlled to repeat printing according to the second print data.

As shown in fig. 11, as a preferred embodiment, the aforementioned inkjet color uniformity portion is a start uniformity portion, that is, a portion where the inkjet head first enters the printing area to eject ink and the ejected color is uniform. In the figure, when the initial stepping distance is smaller than the nozzle length of the initial uniform part of the nozzle color difference, repeated printing is carried out according to the initial stepping distance, printing is carried out according to the printing data of the 1 st time of repeated printing, the stepping distance is 1/3 of the height of the nozzle, the first time of printing is carried out for the precision of installing the nozzle, and the second time and the third time of repeated printing are carried out for the first time.

Example 4

As shown in fig. 10, in the present embodiment, the ink droplets ejected by the printing apparatus include a first ink droplet, a second ink droplet, and a third ink droplet, wherein the first ink droplet has a volume larger than that of the second ink droplet, and the second ink droplet has a volume larger than that of the third ink droplet.

In this embodiment, when the initial step distance D1 is larger than the length L2 of the ink-jet color uniformity portion in the head, S5: according to the stepping distance and the position information, controlling at least one part of nozzles of the inkjet color uniform part in the nozzle to print according to the nozzle precision, and the other nozzles are specifically introduced according to a method for printing according to a dot matrix position printed by adopting the nozzle precision, wherein the method comprises the following steps:

since the initial step distance D1 is larger than the length L2 of the ink-jet color-uniformity portion in the nozzle, the length L2 of the ink-jet color-uniformity portion in the nozzle is used as the step distance after the nozzle scans once for printing, the nozzle can be installed with the ink-jet color-uniformity portion in the nozzle for printing with the accuracy, and the rest of the nozzles can be repeatedly printed.

that is, the inkjet color uniformity portion in the inkjet head is controlled to print an image with the accuracy of the inkjet head.

and processing the image to be printed according to the nozzle precision to obtain dot matrix data printed according to the nozzle precision, and acquiring the printing data printed by the third group of nozzles from the dot matrix data as third printing data.

the third group of nozzles ejects three different volumes of ink droplets of the first ink droplet, the second ink droplet, and the third ink droplet when printing with the nozzle precision. In order to improve printing efficiency while ensuring printing uniformity, the second head ejects first ink droplets and second ink droplets having relatively large volumes in printing, without ejecting third ink droplets having smaller volumes.

in this step, the ink amounts at the time of printing using only the first ink droplet and the second ink droplet having larger volumes are calculated as the fourth printing ink amount.

S560: comparing the fourth printing ink quantity with the ink quantity difference.

S570: obtaining third printing data according to the comparison result of the intermediate printing data and the fourth printing ink quantity and the ink quantity difference value;

if the fourth printing ink amount is smaller than the ink amount difference value, the ink amount is indicated to be insufficient, otherwise, the ink amount is indicated to be sufficient. If the ink quantity is insufficient, part of the second ink drops are converted into the first ink drops, and when the ink quantity is insufficient, part of the third ink drops are replenished to obtain second printing data, so that the total ink quantity printed by all the spray heads can reach the ink quantity of the original printing precision. And directly printing the second intermediate print data as second print data if the ink amount is sufficient.

After the second print data is determined, the fourth set of nozzles may be controlled to print repeatedly according to the second print data.

Example 5

Referring to fig. 12, the present embodiment provides a printing apparatus for eliminating chromatic aberration of an image, including:

The step distance determination module further includes:

an ink quantity difference value acquisition sub-module for acquiring an ink quantity difference Vd of the second printing ink quantity and the first printing ink quantity;

A calculating sub-module, configured to calculate an initial step distance according to a formula d1=1/(Vd/vr+1) ×l1, where L1 is a length of the nozzle, D1 is the initial step distance, and Vr is a second ink printing amount;

a length obtaining submodule, configured to determine a length L2 of the inkjet color uniformity portion in the inkjet head according to position information of the nozzles of the inkjet color uniformity portion;

the comparison submodule is used for comparing the initial stepping distance D1 with the length L2 of the ink-jet color uniform part in the nozzle;

the step distance determining sub-module is used for determining the step distance of the spray head after one-time scanning and printing according to the comparison result.

Example 6

In addition, the printing method of removing the image chromatic aberration of the embodiment of the present invention described in connection with fig. 13 may be implemented by a printing apparatus of removing the image chromatic aberration. Fig. 13 is a schematic diagram showing a hardware configuration of a printing apparatus for removing image chromatic aberration according to an embodiment of the present invention.

The printing apparatus to eliminate image chromatic aberration may include a processor 401 and a memory 402 storing computer program instructions.

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 printing device that eliminates image color differences 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 7

In addition, in combination with the printing method for eliminating the chromatic aberration of the image 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 has stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement any of the printing methods of the above embodiments to eliminate image chromatic aberration.

The foregoing is a detailed description of a printing method, apparatus, device and storage medium for eliminating image chromatic aberration provided by the 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

1. A printing method for eliminating chromatic aberration of an image, the method comprising:

2. The printing method for eliminating image chromatic aberration according to claim 1, wherein said S3: acquiring the position information of the nozzles of the inkjet color uniformity part in the nozzle further comprises the following steps;

s32: and acquiring the position of each nozzle with chromatic aberration through a test chart obtained by scanning and printing.

3. The printing method for eliminating chromatic aberration of an image according to claim 1, wherein the head accuracy is smaller than an original printing accuracy of the image to be printed.

4. A printing method of eliminating image chromatic aberration according to any one of claims 1 to 3, the S4: determining a stepping distance of the nozzle after one-time scanning printing according to the position information and the ink quantity difference value of the first printing ink quantity and the second printing ink quantity, wherein the stepping distance comprises the following steps:

5. The printing method for eliminating image chromatic aberration according to claim 4, wherein: at the S42: and calculating an initial stepping distance according to a formula D1=1/(Vd/Vr+1) x L1 in the initial stepping distance according to the length of the spray head, the second printing ink quantity and the ink quantity difference value, wherein L1 is the length of the spray head, D1 is the initial stepping distance, and Vr is the second printing ink quantity.

6. The printing method for eliminating image chromatic aberration according to claim 4, wherein: the S45: determining the stepping distance of the spray head after one-time scanning printing according to the comparison result comprises the following steps:

7. The printing method for eliminating chromatic aberration of image according to claim 6, wherein if the initial step distance D1 is equal to or less than the length L2 of the ink-jet color-uniform portion in the head, the step S5 comprises the steps of:

8. The printing method for eliminating chromatic aberration of an image according to claim 6, wherein 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, and if the initial step distance D1 is equal to or smaller than the length L2 of the ink-ejection color uniformity portion in the ejection head, the S5 includes the steps of:

s506: comparing a third amount of printing ink to the amount of ink difference;

9. A printing apparatus for removing chromatic aberration of an image, comprising:

10. A printing apparatus for removing chromatic aberration of an image, 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.