Resident printing method, device and equipment based on concentration curve and storage medium

Abstract

The invention discloses a staying type printing method, device and equipment based on a concentration curve and a storage medium, and relates to the technical field of ink-jet printing. According to the method, the average effective height of a single nozzle is determined according to the number of overlapped nozzles; acquiring a first stepping height according to the average effective height of the single nozzle; determining a preset concentration curve according to the first stepping height; and after the nozzle group is controlled to scan ink in the main scanning direction according to the single-time scanning image data and the preset concentration curve, the nozzle group is moved by the distance of the first stepping height in the auxiliary scanning direction, and then the ink is scanned in the main scanning direction according to the single-time scanning image data and the preset concentration curve. According to the invention, the image data of each PASS in the resident printing is divided into two times of printing according to the preset concentration curve, that is, feathering processing is carried out on the printing area, especially the printing area corresponding to the spray head splicing area, in each PASS, so that the problem of splicing channel superposition in the resident printing is relieved, and the image printing quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of inkjet printing, and in particular to a resident printing method, device, equipment and storage medium based on a concentration curve. Background Art

[0002] Inkjet printing technology refers to the technology of spraying ink droplets onto the printing medium through a nozzle to obtain images or text. This technology is non-contact printing, with the advantages of fast printing speed, low pollution, bright image color, long image storage period, and adaptability to a variety of printing media. It has been widely used in the fields of advertising production, office stationery installation, printing proofing, etc.

[0003] In actual production applications, such as Figure 1 As shown in the figure, multiple nozzles H1 to H4 are often spliced ​​into a nozzle group with a height of G1 for printing to increase the height of each image printing. When the printing format is relatively small, the resident printing method is usually used to improve efficiency, that is, the nozzle scans and prints multiple times at the same position. Figure 2 The figure shows a schematic diagram of resident printing. The printing carriage 10 equipped with a nozzle group scans back and forth along the main scanning direction X. When the printing height G1 of one scan (the printing height is determined by the nozzle group height) is greater than or equal to the height G2 of the printing area 20 (or the printing format height G2), and it is known that 4-pass scanning and printing are required to achieve the image accuracy requirements based on the image accuracy and nozzle accuracy, the printing carriage will scan the printing area 20 back and forth 4 times to complete the image printing. Figure 1 When the nozzle group shown in the figure is used for image printing, the problem of stitching paths generated by the nozzle stitching areas (such as D1, D2, and D3) will also be superimposed at the same position. The existing solution is usually to use small steps in the sub-scanning direction Y between each PASS scan to stagger the nozzle stitching positions in each Pass. However, since the stepping distance of the small step is often very small (usually less than one nozzle), the printing area corresponding to the nozzle stitching position will still have the problem of stitching path superposition, which will seriously affect the image printing quality. Summary of the invention

[0004] In view of this, embodiments of the present invention provide a resident printing method, device, equipment and storage medium based on a concentration curve, so as to solve the problem in the prior art that the overlapping of resident printing splicing paths affects the image printing quality.

[0005] In a first aspect, an embodiment of the present invention provides a resident printing method based on a concentration curve, the method comprising:

[0006] Get the number of overlapping nozzles in the nozzle joint area of ​​the nozzle group;

[0007] Determining the average effective height of a single nozzle according to the number of overlapping nozzles;

[0008] Obtaining the first step height according to the average effective height of the single nozzle;

[0009] Determine a preset concentration curve according to the first step height;

[0010] Acquire image data of each scan of the nozzle group, recorded as single scan image data;

[0011] After controlling the nozzle group to scan and discharge ink along the main scanning direction according to the single scanning image data and the preset concentration curve, the nozzle group moves the first step height along the sub-scanning direction perpendicular to the main scanning direction, and then scans and discharges ink along the main scanning direction according to the single scanning image data and the preset concentration curve.

[0012] Preferably, the preset concentration curve has the image height as the horizontal axis and the concentration ratio as the vertical axis, the horizontal axis is divided into a number of intervals according to the first step height, each interval includes a sub-curve, and a number of the sub-curves constitute the preset concentration curve, and the concentration ratio of the sub-curves gradually changes from 0% to 100% or from 100% to 0%.

[0013] Preferably, determining the average effective height of a single nozzle according to the number of overlapping nozzles comprises:

[0014] Obtain the total number of nozzles of the nozzle group;

[0015] Obtaining a total effective nozzle number according to the total nozzle number and the overlapping nozzle number;

[0016] Obtaining the average number of effective nozzles for a single nozzle according to the total number of effective nozzles and the number of nozzles in the nozzle group;

[0017] The average effective height of the single nozzle is obtained according to the average number of effective nozzles of the single nozzle.

[0018] Preferably, after obtaining the average number of effective nozzles of a single nozzle according to the total number of effective nozzles and the number of nozzles in the nozzle group, the method further includes:

[0019] The number of shut-off nozzles in each nozzle is determined according to the average number of effective nozzles of a single nozzle, the number of nozzles of a single nozzle, and the number of overlapping nozzles between two adjacent nozzles.

[0020] Preferably, obtaining the first step height according to the average effective height of the single nozzle comprises:

[0021] The half of the average effective height of the single nozzle is obtained as the first step height.

[0022] Preferably, the acquiring of the image data of each scan of the nozzle group, recorded as single scan image data, includes:

[0023] Obtaining the image accuracy of the image to be printed;

[0024] Get the single printing accuracy of the nozzle group;

[0025] Determine the number of scans according to the image accuracy and the single printing accuracy;

[0026] The single scan image data is acquired according to the scan times and the image data of the image to be printed.

[0027] Preferably, after the nozzle group is controlled to scan and discharge ink along the main scanning direction according to the single scanning image data and the preset concentration curve, it moves the first step height along the sub-scanning direction perpendicular to the main scanning direction, and then scans and discharges ink along the main scanning direction according to the single scanning image data and the preset concentration curve, which comprises:

[0028] Acquire a feathering template according to the preset concentration curve;

[0029] ANDing the single scan image data with the feathering template to obtain first sub single scan image data;

[0030] Controlling the nozzle group to scan and discharge ink along the main scanning direction according to the first sub-single scanning image data;

[0031] Controlling the nozzle group to move the first step height along the secondary scanning direction;

[0032] Inverting the first sub-single-scan image data to obtain second sub-single-scan image data;

[0033] The nozzle group is controlled to scan and discharge ink along the main scanning direction according to the second sub-single scanning image data.

[0034] Preferably, when the image height of the image to be printed along the secondary scanning direction is greater than or equal to the effective printing height, wherein the effective printing height is equal to the number of scans multiplied by the average effective height of the single nozzle minus the first advance height, the method further includes:

[0035] After the nozzle group completes scanning and printing of the current image printing area according to the scanning times, it moves a second step height along the secondary scanning direction to the next printing area; wherein the second step height is equal to the effective printing height;

[0036] Acquire image data corresponding to each scan of the next printing area by the nozzle group, and record it as the next single scan image data;

[0037] After controlling the nozzle group to scan and discharge ink along the main scanning direction according to the next single scanning image data and the preset concentration curve, the nozzle group moves along the sub-scanning direction by the distance of the first step height, and then scans and discharges ink along the main scanning direction according to the next single scanning image data and the preset concentration curve.

[0038] In a second aspect, an embodiment of the present invention provides a resident printing device based on a concentration curve, the device comprising:

[0039] An overlapping nozzle number acquisition module is used to acquire the number of overlapping nozzles in the nozzle splicing area in the nozzle group;

[0040] A single nozzle average effective height acquisition and determination module, used to determine the single nozzle average effective height according to the number of overlapping nozzles;

[0041] A first step height acquisition module, used to acquire the first step height according to the average effective height of the single nozzle;

[0042] A preset concentration curve determining module, used to determine a preset concentration curve according to the first step height;

[0043] A single scan image data acquisition module is used to acquire the image data of each scan of the nozzle group, which is recorded as single scan image data;

[0044] The printing module is used to control the nozzle group to scan and discharge ink along the main scanning direction according to the single scanning image data and the preset concentration curve, move the first step height along the sub-scanning direction perpendicular to the main scanning direction, and then scan and discharge ink along the main scanning direction according to the single scanning image data and the preset concentration curve.

[0045] In a third aspect, an embodiment of the present invention provides a resident printing device based on a concentration curve, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, and when the computer program instructions are executed by the processor, the method of the first aspect in the above embodiment is implemented.

[0046] In a fourth aspect, an embodiment of the present invention provides a storage medium having computer program instructions stored thereon, which implements the method of the first aspect in the above-mentioned embodiment when the computer program instructions are executed by a processor.

[0047] In summary, the beneficial effects of the present invention are as follows:

[0048] The resident printing method, device, equipment and storage medium based on the concentration curve provided by the embodiment of the present invention are as follows: obtaining the number of overlapping nozzles in the nozzle splicing area in the nozzle group; determining the average effective height of a single nozzle according to the number of overlapping nozzles; obtaining the first step height according to the average effective height of the single nozzle; determining the preset concentration curve according to the first step height; obtaining the image data of each scan of the nozzle group, recorded as single scan image data; controlling the nozzle group to scan and discharge ink along the main scanning direction according to the single scan image data and the preset concentration curve, and then moving the distance of the first step height along the sub-scanning direction perpendicular to the main scanning direction, and then scanning and discharge ink along the main scanning direction according to the single scan image data and the preset concentration curve. The present invention divides the image data of each PASS in the resident printing into two prints according to the preset concentration curve, which is equivalent to feathering the printing area corresponding to each PASS, especially the nozzle splicing area, thereby reducing the splicing path in each PASS, reducing the splicing path superposition problem in the resident printing, and improving the image printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the embodiment of the present invention will be briefly introduced below. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the present invention.

[0050] Figure 1 It is a schematic diagram of a plurality of nozzles spliced ​​into a nozzle group in the background technology.

[0051] Figure 2 It is a schematic diagram of resident printing in the background technology.

[0052] Figure 3 It is a schematic flow chart of a resident printing method based on a concentration curve according to an embodiment of the present invention.

[0053] Figure 4 Schematic diagram of a nozzle group according to an embodiment of the present invention.

[0054] Figure 5 Schematic diagram of image data of an image to be printed according to an embodiment of the present invention.

[0055] Figure 6 Schematic diagram of a preset concentration curve according to an embodiment of the present invention.

[0056] Figure 7 Schematic diagram of a feathering template according to an embodiment of the present invention.

[0057] Figure 8It is a schematic flow chart of a resident printing method based on different concentration curves according to an embodiment of the present invention.

[0058] Fig. 9 Schematic diagram of a first preset concentration curve and a second preset concentration curve according to an embodiment of the present invention.

[0059] Fig.10a It is a schematic diagram of the first feathering template of an embodiment of the present invention.

[0060] Fig.10b Schematic diagram of the second feathering template of an embodiment of the present invention.

[0061] Fig.11 It is a schematic structural diagram of a resident printing device based on a concentration curve according to an embodiment of the present invention.

[0062] Fig.12 It is a schematic structural diagram of a resident printing device based on a concentration curve according to an embodiment of the present invention. DETAILED DESCRIPTION

[0063] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and Examples. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0065] Embodiment 1

[0066] The embodiment of the present invention provides a resident printing method based on a concentration curve. The method is applicable to resident printing. The printing device of resident printing includes at least one printing carriage. A nozzle group composed of multiple nozzles is installed in the printing carriage. The printing carriage can reciprocate in the positive and negative directions along the main scanning direction X to scan ink and print images, and can step in the sub-scanning direction Y. In actual printing, the positive and negative directions of the main scanning direction are determined according to actual conditions, such as Figure 2 The main scanning direction X positive direction can be set from right to left, and the main scanning direction X negative direction can be set from left to right. The main scanning direction X negative direction can be set from right to left, and the main scanning direction X positive direction can be set from left to right.

[0067] See also Figure 3 The resident printing method based on the concentration curve specifically comprises the following steps:

[0068] S1: Obtain the number of overlapping nozzles in the nozzle splicing area of ​​the nozzle group;

[0069] S2: Determine the average effective height of a single nozzle according to the number of overlapping nozzles;

[0070] S3: Obtaining the first step height according to the average effective height of the single nozzle;

[0071] S4: Determine a preset concentration curve according to the first step height;

[0072] S5: acquiring image data of each scan of the nozzle group, recorded as single scan image data;

[0073] S6: After controlling the nozzle group to scan and discharge ink along the main scanning direction according to the single scanning image data and the preset concentration curve, it moves the first step height along the sub-scanning direction perpendicular to the main scanning direction, and then scans and discharges ink along the main scanning direction according to the single scanning image data and the preset concentration curve.

[0074] Specifically, when the inkjet printing nozzle group is composed of multiple nozzles, there will be some overlapped nozzles at the position where two adjacent nozzles are spliced ​​or in the nozzle splicing area. Figure 1The nozzles of the nozzle H1 in the nozzle joint area D1 are the overlapping nozzles of the nozzle H1, and the nozzles of the nozzle H2 in the nozzle joint area D1 are the overlapping nozzles of the nozzle H2. If the overlapping nozzles in the two spliced ​​nozzles all discharge ink, the amount of ink in the printing area corresponding to the nozzle joint area will increase, thereby increasing the image density and affecting the printing effect. During printing, the overlapping nozzles (also called closed holes) in one of the nozzles are often closed, while the overlapping nozzles in the other nozzle discharge ink normally to avoid an increase in printing density. Therefore, the number of nozzles that actually discharge ink in the nozzle group will be less than the sum of the number of nozzles of all nozzles. In an embodiment of the present invention, the nozzles that actually discharge ink are referred to as effective nozzles, and the actual printing height or effective height of each nozzle when printing is defined by the number of effective nozzles in each nozzle. For example, if the number of overlapping nozzles in nozzles H1 and H2 is 20, all nozzles of nozzle H1 discharge ink normally during printing, and the 20 overlapping nozzles in nozzle H2 are closed, then the effective number of nozzles in H1 is 800, and its effective height is 800, and the effective number of nozzles in H2 is 780, and its effective height is 780.

[0075] In the embodiment of the present invention, the number of overlapping nozzles in the nozzle joint area of ​​the nozzle group in step S1 refers to the number of all overlapping nozzles in the nozzle group. According to the number of overlapping nozzles, the total effective nozzle number or total effective height of the nozzle group can be obtained, thereby further determining the average effective height of a single nozzle.

[0076] Preferably, determining the average effective height of a single nozzle according to the number of overlapping nozzles comprises:

[0077] Obtain the total number of nozzles of the nozzle group;

[0078] Obtaining a total effective nozzle number according to the total nozzle number and the overlapping nozzle number;

[0079] Obtaining the average number of effective nozzles for a single nozzle according to the total number of effective nozzles and the number of nozzles in the nozzle group;

[0080] The average effective height of the single nozzle is obtained according to the average number of effective nozzles of the single nozzle.

[0081] Exemplarily, in the embodiments of the present invention, the following is used: Figure 4 The nozzle group shown performs inkjet printing. Assume that the number of nozzles in nozzles H1, H2, H3 and H4 is 800, and the number of overlapping nozzles in the joint area of ​​each nozzle is represented by D12, D23 and D34 respectively, where D12=42, D23=38 and D34=40.

[0082] The total number of nozzles in the nozzle group is 800×4=3200. After the four nozzles are spliced, the total number of effective nozzles is 800×4-D12-D23-D34=3080. These effective nozzles are divided into 4 parts according to the number of nozzles. The number of nozzles in each part is 3080÷4=770, which is recorded as the average effective nozzle number of a single nozzle. Figure 4 As shown, the average number of effective nozzles of a single nozzle is 770, and the corresponding average effective height of a single nozzle is L=L1=L2=L3=L4=770.

[0083] Preferably, after obtaining the average number of effective nozzles of a single nozzle, the method further includes: determining the number of shut-off nozzles in each nozzle according to the average number of effective nozzles of the single nozzle, the number of nozzles of a single nozzle and the number of overlapping nozzles between two adjacent nozzles.

[0084] That is, in order to achieve the actual printing height of each nozzle to be the above-mentioned average effective height of a single nozzle, it is necessary to determine the number of nozzles with closed holes in each nozzle, so as to close the holes of these nozzles. For example, in order to achieve the effect of an average effective height of 770 for a single nozzle, the following settings are made for each nozzle: D12_2 nozzles are closed on the right side of nozzle H1, D12_1 nozzle is closed on the left side of nozzle H2, D23_2 nozzles are closed on the right side of nozzle H2, D23_1 nozzle is closed on the left side of nozzle H3, D34_2 nozzles are closed on the right side of nozzle H3, and D34_1 nozzle is closed on the left side of nozzle H4, where:

[0085] D12_2=800-L1=30;

[0086] D12_1=D12-D12_2=12;

[0087] D23_2=800×2-D12-L1-L2=20;

[0088] D23_1=D23-D23_2=20;

[0089] D34_2=800×3-D12-D23-L1-L2-L3=10;

[0090] D34_1=D34-D34_2=30.

[0091] Furthermore, the first step height can be obtained according to the average effective height of a single nozzle, wherein the first step height is half of the average effective height of a single nozzle, recorded as L / 2. For example, if the average effective height of a single nozzle is 770, then the first step height is 385 (the distance of 385 nozzles).

[0092] Preferably, the acquiring of the image data of each scan of the nozzle group, recorded as single scan image data, includes:

[0093] Obtaining the image accuracy of the image to be printed;

[0094] Get the single printing accuracy of the nozzle group;

[0095] Determine the number of scans according to the image accuracy and the single printing accuracy;

[0096] The single scan image data is acquired according to the scan times and the image data of the image to be printed.

[0097] For example, suppose the image precision of the image to be printed is 720×1200, and the printing precision of the nozzle group scanning once (recorded as single printing precision of 360×600), and the printing mode adopts resident printing, then the number of scans is (720÷360)×(1200÷600)=4. Accordingly, the image data of the image to be printed needs to be divided into four parts, and one part is printed each time the ink is scanned, so each part of the image data is recorded as single scan image data. Figure 5 As shown, in the existing resident printing, in the first scan (first PASS), the single scan image data labeled 1 is printed, in the second scan (second PASS), the single scan image data labeled 2 is printed, in the third scan (third PASS), the single scan image data labeled 3 is printed, and in the fourth scan (fourth PASS), the single scan image data labeled 4 is printed. In order to avoid the problem of a splicing path appearing at the printing position corresponding to the splicing area of ​​the nozzle group in the resident printing, in the embodiment of the present invention, the single scan image data corresponding to each PASS is divided into two prints, and the image data in these two prints (respectively recorded as the first sub-single scan image data and the second sub-single scan image data) form complementary concentrations, so that the sum of the two image data (the first sub-single scan image data and the second sub-single scan image data) is the single scan image data.

[0098] In the embodiment of the present invention, taking the printing of the first PASS as an example, how to perform split printing of single scan image data is described. First, a preset concentration curve is determined. Preferably, the preset concentration curve has the image height as the horizontal axis and the concentration ratio as the vertical axis, and the horizontal axis is divided into a plurality of intervals according to the first step height, each interval includes a sub-curve, and the concentration ratios of the plurality of sub-curves gradually change from 0% to 100% or from 100% to 0%.

[0099] like Figure 6As shown, the preset concentration curve takes the image height (i.e., the length of the image in the sub-scanning direction) as the horizontal axis and the concentration ratio as the vertical axis, wherein the horizontal axis is divided into several intervals according to the first step height (L / 2), each interval length is L / 2, and each interval has a sub-curve, that is, the concentration relationship curve is divided into several sub-curves according to the first step height (L / 2), and the concentration of these sub-curves gradually changes from 0% to 100% or from 100% to 0% in each L / 2 interval, such as the concentration ratio of the sub-curve in the 0-L / 2 interval in Pass0_1 or the L / 2-L interval in Pass0_2 changes from 0% to 100%, and the concentration ratio of the sub-curve in the L / 2-L interval in Pass0_1 or the L-3L / 2 interval in Pass0_2 changes from 100% to 0%. And so on, until it gradually changes from 100% to 0% in the last interval. Preferably, each sub-curve is a line segment. In other embodiments, the sub-curve may also be a quadratic function curve, etc., and the concentrations of two adjacent sub-curves are symmetrically distributed about the boundary lines of each interval.

[0100] After obtaining the preset concentration curve, the original first PASS is divided into two prints. Figure 6 As shown in FIG. 1 , when the nozzle group starts to scan and discharge ink along the main scanning direction from the position where the image height is 0, the single scanning image data corresponding to the original first PASS is first printed according to the preset concentration curve in Pass0_1, and then the nozzle group moves the first step distance (L / 2) along the sub-scanning direction, that is, moves to the position where the image height is L / 2, and then prints the single scanning image data corresponding to the original first PASS according to the preset concentration curve in Pass0_2. Figure 6 It can be known that the concentrations of the image data printed twice according to the preset concentration curve are complementary, wherein, except for the 0-L / 2 interval in Pass0_1 and the 4L-9L / 2 interval in Pass0_2, the concentrations of the image data in the L / 2-L interval in Pass0_1 are complementary to the concentrations of the image data in the L / 2-L interval in Pass0_2, the concentrations of the image data in the L-3L / 2 interval in Pass0_1 are complementary to the concentrations of the image data in the L-3L / 2 interval in Pass0_2...Finally, the sum of the data printed twice, Pass0_1 and Pass0_2, is the single scan image data of the original first PASS.

[0101] In Pass0_1 and Pass0_2, printing the single scan image data corresponding to the original first PASS according to the preset concentration curve can be achieved in the following ways:

[0102] Acquire a feathering template according to the preset concentration curve;

[0103] ANDing the single scan image data with the feathering template to obtain first sub single scan image data;

[0104] Controlling the nozzle group to scan and discharge ink along the main scanning direction according to the first sub-single scanning image data;

[0105] Controlling the nozzle group to move the first step height along the secondary scanning direction;

[0106] Inverting the first sub-single-scan image data to obtain second sub-single-scan image data;

[0107] The nozzle group is controlled to scan and discharge ink along the main scanning direction according to the second sub-single scanning image data.

[0108] Specifically, a feathering template is obtained according to the preset concentration curve, and the height M1 of the feathering template in the secondary scanning direction Y is the same as the height G1 of the nozzle group, such as Figure 7 As shown, the feathering template is divided into several sub-template intervals according to the first step height L / 2, and the height of each sub-template interval (in the sub-scanning direction Y) is L / 2, and the data concentration of the first sub-template from the left gradually changes from 0% to 100%, and the data concentration of the second sub-template gradually changes from 100% to 0%, and the data concentration of the third sub-template gradually changes from 0% to 100%... The single-scan image data corresponding to the first PASS and the feathering template are ANDed to obtain the first sub-single-scan image data; then the nozzle group is controlled to scan the ink and print the image along the main scanning direction according to the first sub-single-scan image data; after completing one scan, the nozzle group is controlled to move the first step height along the sub-scanning direction; the first sub-single-scan image data is inverted to obtain the second sub-single-scan image data; the nozzle group is controlled to scan the ink and print the image along the main scanning direction according to the second sub-single-scan image data. After two scans, Figure 6 It is known that, except Interval and Only half of the original data of the two areas can be printed in the interval. Since the density of the other areas is complementary, the final printed data is consistent with the original data. Therefore, the actual effective printing area of ​​the image is Similarly, the printing of the second PASS, the third PASS and the fourth PASS is consistent with the first PASS, which will not be repeated here. Thus, the resident printing of 4 PASS is completed.

[0109] If the height of the image to be printed is less than or equal to After the 4PASS resident printing, all images are printed. Then after the above 4-pass resident printing, move to the next area by large stepping. The specific steps are as follows:

[0110] After the nozzle group completes scanning and printing of the current image printing area according to the scanning times, it moves a second step height along the secondary scanning direction to the next printing area; wherein the second step height is equal to the effective printing height;

[0111] Acquire image data corresponding to each scan of the next printing area by the nozzle group, and record it as the next single scan image data;

[0112] After controlling the nozzle group to scan and discharge ink along the main scanning direction according to the next single scanning image data and the preset concentration curve, the nozzle group moves along the sub-scanning direction by the distance of the first step height, and then scans and discharges ink along the main scanning direction according to the next single scanning image data and the preset concentration curve.

[0113] The effective printing height here is the actual effective height of the image after completing a resident printing. In the embodiment of the present invention, the effective printing height is That is, it is equal to the number of scans multiplied by the average effective height of the single nozzle minus the first step height. After the nozzle group is controlled to move the second step height (the second step height is equal to the effective printing height) along the secondary scanning direction, the next image area is printed according to the above 4PASS printing method. If the image has not been printed, the nozzle group is also controlled to move the second step height again along the secondary scanning direction, and the printing process is repeated until all images are printed.

[0114] In summary, the resident printing method based on the concentration curve provided by the embodiment of the present invention obtains the number of overlapping nozzles in the nozzle splicing area in the nozzle group; determines the average effective height of a single nozzle according to the number of overlapping nozzles; obtains the first step height according to the average effective height of the single nozzle; determines the preset concentration curve according to the first step height; obtains the image data of each scan of the nozzle group, recorded as single scan image data; controls the nozzle group to scan and discharge ink along the main scanning direction according to the single scan image data and the preset concentration curve, and then moves the distance of the first step height along the sub-scanning direction perpendicular to the main scanning direction, and then scans and discharges ink along the main scanning direction according to the single scan image data and the preset concentration curve. The present invention divides the image data of each PASS in the resident printing into two prints according to the preset concentration curve, which is equivalent to feathering the printing area corresponding to each PASS, especially the nozzle splicing area, thereby reducing the splicing path in each PASS, reducing the splicing path superposition problem in the resident printing, and improving the image printing quality.

[0115] Embodiment 2

[0116] Based on the above-mentioned embodiment 1, the embodiment 2 of the present invention provides a resident printing method based on different concentration curves. The method is applicable to resident printing. The printing device of resident printing includes at least one printing carriage. The printing carriage is equipped with a nozzle group composed of multiple nozzles. The printing carriage can reciprocate in the positive and negative directions along the main scanning direction X to scan the ink and print the image, and can step in the sub-scanning direction Y. In actual printing, the positive and negative directions of the main scanning direction are determined according to the actual situation, such as Figure 2 The main scanning direction X positive direction can be set from right to left, and the main scanning direction X negative direction can be set from left to right. The main scanning direction X negative direction can be set from right to left, and the main scanning direction X positive direction can be set from left to right.

[0117] See also Figure 8 , the method specifically comprises the following steps:

[0118] S10: Obtain the number of overlapping nozzles in the nozzle splicing area of ​​the nozzle group;

[0119] S20: Determine the average effective height of a single nozzle according to the number of overlapping nozzles;

[0120] S30: Obtaining the first step height according to the average effective height of the single nozzle;

[0121] S40: determining a first preset concentration curve and a second preset concentration curve according to the first step height, wherein the second preset concentration curve is different from the first preset concentration curve;

[0122] S50: acquiring image data of each scan of the nozzle group, recorded as single scan image data;

[0123] S60: Control the nozzle group to scan and discharge ink along the main scanning direction according to the single scanning image data and the first preset concentration curve, move the first step height along the sub-scanning direction perpendicular to the main scanning direction, and then scan and discharge ink along the main scanning direction according to the single scanning image data and the second preset concentration curve.

[0124] Among them, the first preset concentration curve has the image height as the horizontal axis and the concentration ratio as the vertical axis, and the horizontal axis is divided into a number of intervals according to the first step height, each interval includes a first sub-curve, and a number of the first sub-curves constitute the first preset concentration curve. Except for the first first sub-curve whose concentration ratio is 100%, the concentration ratios of the other first sub-curves gradually change from 0% to 100% or from 100% to 0%; the second preset concentration curve has the image height as the horizontal axis and the concentration ratio as the vertical axis, and the horizontal axis is divided into a number of intervals according to the first step height, each interval includes a second sub-curve, and a number of the second sub-curves constitute the second preset concentration curve. Except for the last second sub-curve whose concentration ratio is 100%, the concentration ratios of the other second sub-curves gradually change from 0% to 100% or from 100% to 0%.

[0125] Specifically, according to the preset concentration curve shown in Example 1, it can be seen that due to Interval and Only half of the original data in the two areas can be printed in the interval. Since the density of the other areas is complementary, the final printed data is consistent with the original data. Therefore, the actual effective printing interval of the image is and Interval and To avoid this situation, another preset concentration curve is provided in the embodiment of the present invention to ensure that all printing intervals are valid printing intervals.

[0126] In the embodiment of the present invention, the steps of obtaining the number of overlapping nozzles in the nozzle joint area of ​​the nozzle group, determining the average effective height of a single nozzle according to the number of overlapping nozzles, and obtaining the first step height according to the average effective height of the single nozzle are the same as those described in the first embodiment, and are not repeated here. In the second embodiment of the present invention, the focus is on how to determine the first preset concentration curve and the second preset concentration curve according to the first step height.

[0127] like Fig. 9As shown, the first preset concentration curve corresponds to the curve shown in Pass0_1. Similarly, the first preset concentration curve uses the image height (i.e., the length of the image in the sub-scanning direction) as the horizontal axis and the concentration ratio as the vertical axis, wherein the horizontal axis is divided into a number of intervals according to the first step height (L / 2), and the length of each interval is L / 2. Each interval contains a first sub-curve, that is, the first concentration relationship curve is divided into a number of first sub-curves according to the first step height (L / 2), wherein, in the first interval, i.e., the interval of 0 to L / 2, the concentration ratio is 100%, and in the interval of L / 2 to L, it gradually changes from 100% to 0%, and in the interval of L to 3L / 2, it gradually changes from 0% to 100%, and so on, until it gradually changes from 100% to 0% in the last interval (7L / 2 to 4L). Preferably, each first sub-curve is a straight line. In other embodiments, in addition to the first sub-curve in the interval of 0 to L / 2, the first sub-curves in other intervals may also be quadratic function curves, and the concentrations of two adjacent first sub-curves are symmetrically distributed about the boundary lines of each interval.

[0128] The second preset concentration curve corresponds to the curve shown in Pass0_2. The second preset concentration curve uses the image height (i.e., the length of the image in the sub-scanning direction) as the horizontal axis and the concentration ratio as the vertical axis, wherein the horizontal axis is divided into several intervals according to the first step height (L / 2), and the length of each interval is L / 2. Each interval contains a second sub-curve, that is, the second concentration relationship curve is divided into several second sub-curves according to the first step height (L / 2), wherein, in the interval of 0 to L / 2, the concentration ratio is 0%, and in the interval of L / 2 to L, it gradually changes from 0% to 100%, and in the interval of L to 3L / 2, it gradually changes from 100% to 0%, and so on, until it gradually changes from 100% to 0% in the last interval (4L to 9L / 2). Preferably, each second sub-curve is a straight line. In other embodiments, in addition to the second sub-curves in the 0-L / 2 interval and the 4L-9L / 2 interval, the second sub-curves in other intervals can also be quadratic function curves, and the concentrations of two adjacent second sub-curves are symmetrically distributed about the boundary lines of each interval.

[0129] After obtaining the first preset concentration curve and the second preset concentration curve, the original first PASS is divided into two prints. Fig. 9 As shown in FIG. 1 , when the nozzle group starts to scan and discharge ink along the main scanning direction from the position where the image height is 0, the single scanning image data corresponding to the original first PASS is first printed according to the first preset concentration curve in Pass0_1, and then the nozzle group moves the first step distance (L / 2) along the sub-scanning direction, that is, moves to the position where the image height is L / 2, and then prints the single scanning image data corresponding to the original first PASS according to the second preset concentration curve in Pass0_2. Fig. 9It can be seen that the concentrations of the image data printed twice according to the first preset concentration curve and the second preset concentration curve are complementary, such as the concentration of the image data in the interval of 0 to L / 2 in Pass0_1 is complementary to the concentration of the image data in the interval of 0 to L / 2 in Pass0_2; the concentration of the image data in the interval of L / 2 to L in Pass0_1 is complementary to the concentration of the image data in the interval of L / 2 to L in Pass0_2, the concentration of the image data in the interval of L to 3L / 2 in Pass0_1 is complementary to the concentration of the image data in the interval of L to 3L / 2 in Pass0_2... Finally, the sum of the data printed twice, Pass0_1 and Pass0_2, is the single scan image data of the original first PASS.

[0130] Specifically, in Pass0_1 and Pass0_2, printing the single scan image data corresponding to the original first PASS according to the first preset concentration curve and the second preset concentration curve can be achieved in the following manner:

[0131] Acquire a first feathering template according to the first preset concentration curve;

[0132] Acquire a second feathering template according to the second preset concentration curve;

[0133] ANDing the single scan image data with the first feathering template to obtain first sub single scan image data;

[0134] Controlling the nozzle group to scan and discharge ink along the main scanning direction according to the first sub-single scanning image data;

[0135] Controlling the nozzle group to move the first step height along the secondary scanning direction;

[0136] ANDing the single scan image data with the second feathering template to obtain second sub single scan image data;

[0137] The nozzle group is controlled to scan and discharge ink along the main scanning direction according to the second sub-single scanning image data.

[0138] Specifically, a first feathering template is obtained according to the first preset concentration curve, and a height M1 of the first feathering template in the secondary scanning direction Y is the same as a height G1 of the nozzle group. Fig.10aAs shown, the first feathering template is divided into several sub-template intervals according to the first step height L / 2, and the height of each sub-template interval (in the secondary scanning direction Y) is L / 2, and the data concentration of the first template from the left is 100%, the data concentration of the second sub-template gradually changes from 100% to 0%, and the data concentration of the third sub-template gradually changes from 0% to 100%... The second feathering template is obtained according to the second preset concentration curve, and the height M1 of the second feathering template in the secondary scanning direction Y is the same as the nozzle group height G1, as shown in FIG. Fig.10b As shown, the second feathering template is divided into several sub-template intervals according to the first step height L / 2, and the height of each sub-template interval (in the secondary scanning direction Y) is L / 2, and the data concentration of the first sub-template from the left gradually changes from 0% to 100%, the data concentration of the second sub-template gradually changes from 100% to 0%, and the data concentration of the third sub-template gradually changes from 0% to 100%... until the data concentration of the last sub-template is 100%, so that the second sub-template in the first feathering template and the first sub-template in the second feathering template are complementary, the third sub-template in the first feathering template and the second sub-template in the second feathering template are complementary... The Nth sub-template in the first feathering template and the N-1th sub-template in the second feathering template are complementary. N is greater than or equal to 2.

[0139] The single scan image data corresponding to the first PASS is ANDed with the first feathering template to obtain the first sub-single scan image data; then the nozzle group is controlled to scan the ink and print the image along the main scan direction according to the first sub-single scan image data; after completing one scan, the nozzle group is controlled to move the first step height along the sub-scan direction; similarly, the single scan image data and the second feathering template are ANDed to obtain the second sub-single scan image data; the nozzle group is controlled to scan the ink and print the image along the main scan direction according to the second sub-single scan image data. After two scans, Fig. 9 It is known that including Interval and Since the two scans print complementary density data in all areas within the interval, the final printed data is consistent with the original data. Therefore, the actual effective printing area of ​​the image is Similarly, the printing of the second PASS, the third PASS and the fourth PASS is consistent with the first PASS, which will not be repeated here. Thus, the resident printing of 4 PASS is completed.

[0140] If the height of the image to be printed is less than or equal to After the 4PASS resident printing, all images are printed. Then after the above 4-pass resident printing, move to the next area by large stepping. The specific steps are as follows:

[0141] After the nozzle group completes scanning and printing of the current image printing area according to the scanning times, it moves a second step height along the secondary scanning direction to the next printing area; wherein the second step height is equal to the effective printing height;

[0142] Acquire image data corresponding to each scan of the next printing area by the nozzle group, and record it as the next single scan image data;

[0143] After controlling the nozzle group to scan and discharge ink along the main scanning direction according to the next single scanning image data and the preset concentration curve, the nozzle group moves along the sub-scanning direction by the distance of the first step height, and then scans and discharges ink along the main scanning direction according to the next single scanning image data and the preset concentration curve.

[0144] The effective printing height here is the actual effective height of the image after completing a resident printing. In the embodiment of the present invention, the effective printing height is That is, it is equal to the number of scans multiplied by the average effective height of the single nozzle plus the first step height. Control the nozzle group to move the second step height along the secondary scanning direction After the distance (the second step height is equal to the effective printing height) is reached, the next image area is printed according to the above 4PASS printing method. If the image has not been printed yet, the nozzle group is controlled to move the second step height again along the secondary scanning direction, and the printing process is repeated until all images are printed.

[0145] In summary, the resident printing method based on different concentration curves provided by the embodiment of the present invention obtains the number of overlapping nozzles in the nozzle splicing area in the nozzle group; determines the average effective height of a single nozzle according to the number of overlapping nozzles; obtains the first step height according to the average effective height of the single nozzle; determines the first preset concentration curve and the second preset concentration curve according to the first step height, wherein the second preset concentration curve is different from the first preset concentration curve; obtains the image data of each scan of the nozzle group, recorded as single scan image data; controls the nozzle group according to the single scan image data and the first preset concentration curve After scanning and discharging ink along the main scanning direction, the first step height is moved along the sub-scanning direction perpendicular to the main scanning direction, and then the ink is scanned and discharging along the main scanning direction according to the single scanning image data and the second preset concentration curve. The present invention divides the image data of each PASS in the resident printing into two prints according to the first preset concentration curve and the second preset concentration curve, which is equivalent to feathering the printing area corresponding to each PASS, especially the nozzle splicing area, thereby reducing the splicing path in each PASS, reducing the splicing path overlap problem in the resident printing, and improving the image printing quality.

[0146] Embodiment 3

[0147] See also Fig.11 Based on the above embodiment 1, the embodiment of the present invention provides a resident printing device 200 based on a concentration curve, and the device 200 includes:

[0148] The overlapping nozzle number acquisition module 201 is used to acquire the number of overlapping nozzles in the nozzle splicing area in the nozzle group;

[0149] A single nozzle average effective height acquisition and determination module 202 is used to determine the single nozzle average effective height according to the number of overlapping nozzles;

[0150] A first step height acquisition module 203 is used to acquire the first step height according to the average effective height of the single nozzle;

[0151] A preset concentration curve determining module 204, configured to determine a preset concentration curve according to the first step height;

[0152] A single scan image data acquisition module 205 is used to acquire the image data of each scan of the nozzle group, which is recorded as single scan image data;

[0153] The printing module 206 is used to control the nozzle group to scan and discharge ink along the main scanning direction according to the single scanning image data and the preset concentration curve, move the first step height along the sub-scanning direction perpendicular to the main scanning direction, and then scan and discharge ink along the main scanning direction according to the single scanning image data and the preset concentration curve.

[0154] In summary, the resident printing device based on the concentration curve provided by the embodiment of the present invention obtains the number of overlapping nozzles in the nozzle splicing area in the nozzle group; determines the average effective height of a single nozzle according to the number of overlapping nozzles; obtains the first step height according to the average effective height of the single nozzle; determines the preset concentration curve according to the first step height; obtains the image data of each scan of the nozzle group, recorded as single scan image data; controls the nozzle group to scan and discharge ink along the main scanning direction according to the single scan image data and the preset concentration curve, and then moves the distance of the first step height along the sub-scanning direction perpendicular to the main scanning direction, and then scans and discharges ink along the main scanning direction according to the single scan image data and the preset concentration curve. The present invention divides the image data of each PASS in the resident printing into two prints according to the preset concentration curve, which is equivalent to feathering the printing area corresponding to each PASS, especially the nozzle splicing area, thereby reducing the splicing path in each PASS, reducing the splicing path superposition problem in the resident printing, and improving the image printing quality.

[0155] Embodiment 4

[0156] In addition, the resident printing method based on the concentration curve of the embodiment of the present invention can be implemented by a resident printing device based on the concentration curve. Fig.12 A schematic diagram of the hardware structure of a resident printing device based on a concentration curve provided by an embodiment of the present invention is shown.

[0157] The density profile-based resident printing device may include a processor 301 and a memory 302 storing computer program instructions.

[0158] Specifically, the processor 301 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiment of the present invention.

[0159] The memory 302 may include a large capacity memory for data or instructions. For example, but not limitation, the memory 302 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 302 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 302 may be inside or outside the data processing device. In a specific embodiment, the memory 302 is a non-volatile solid-state memory. In a specific embodiment, the memory 302 includes a read-only memory (ROM). In appropriate cases, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM) or a flash memory or a combination of two or more of these.

[0160] The processor 301 reads and executes the computer program instructions stored in the memory 302 to implement any one of the resident printing methods based on the concentration curve in the above embodiments.

[0161] In one example, the resident printing device based on the density curve may further include a communication interface 303 and a bus 310. Fig.12 As shown, the processor 301, the memory 302, and the communication interface 303 are connected via a bus 310 and communicate with each other.

[0162] The communication interface 303 is mainly used to implement the communication between the modules, devices, units and / or equipment in the embodiment of the present invention.

[0163] Bus 310 includes hardware, software or both, and the components of the resident printing device based on the concentration curve are coupled to each other. For example, but not limitation, bus 310 may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front-end bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 310 may include one or more buses. Although the embodiment of the present invention describes and shows a specific bus, the present invention considers any suitable bus or interconnection.

[0164] Embodiment 5

[0165] In addition, in combination with the resident printing method based on the concentration curve in the above embodiment, the embodiment of the present invention can provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by the processor 301, any one of the resident printing methods based on the concentration curve in the above embodiment is implemented.

[0166] It should be clear that the present invention is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is 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 the steps after understanding the spirit of the present invention.

[0167] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present invention are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0168] It should also be noted that the exemplary embodiments mentioned in the present invention 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 steps, that is, the steps can be performed in the order mentioned in the embodiments, or in a different order from the embodiments, or several steps can be performed simultaneously.

[0169] The above is only a specific implementation of the present invention. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the system, module and unit described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be covered within the protection scope of the present invention.

Claims

1. A resident printing method based on a concentration curve, characterized in that: The method uses a nozzle group formed by splicing multiple nozzles to perform resident printing, including: Get the number of overlapping nozzles in the nozzle joint area of ​​the nozzle group; Determining the average effective height of a single nozzle according to the number of overlapping nozzles; Obtaining the first step height according to the average effective height of the single nozzle; Determine a preset concentration curve according to the first step height; Acquire image data of each scan of the nozzle group, recorded as single scan image data; After controlling the nozzle group to scan and discharge ink along the main scanning direction according to the single scanning image data and the preset concentration curve, the nozzle group moves the first step height along the sub-scanning direction perpendicular to the main scanning direction, and then scans and discharges ink along the main scanning direction according to the single scanning image data and the preset concentration curve.

2. The resident printing method based on concentration curve according to claim 1, characterized in that: The preset concentration curve has the image height as the horizontal axis and the concentration ratio as the vertical axis. The horizontal axis is divided into several intervals according to the first step height. Each interval includes a sub-curve. Several sub-curves constitute the preset concentration curve. The concentration ratio of several sub-curves gradually changes from 0% to 100% or from 100% to 0%.

3. The resident printing method based on concentration curve according to claim 1, characterized in that: Determining the average effective height of a single nozzle according to the number of overlapping nozzles comprises: Obtain the total number of nozzles of the nozzle group; Obtaining a total effective nozzle number according to the total nozzle number and the overlapping nozzle number; Obtaining the average number of effective nozzles for a single nozzle according to the total number of effective nozzles and the number of nozzles in the nozzle group; The average effective height of the single nozzle is obtained according to the average number of effective nozzles of the single nozzle.

4. The resident printing method based on concentration curve according to claim 3, characterized in that: After obtaining the average number of effective nozzles of a single nozzle according to the total number of effective nozzles and the number of nozzles in the nozzle group, the method further includes: The number of shut-off nozzles in each nozzle is determined according to the average number of effective nozzles of a single nozzle, the number of nozzles of a single nozzle, and the number of overlapping nozzles between two adjacent nozzles.

5. The resident printing method based on concentration curve according to claim 1, characterized in that: The acquisition of the image data of each scan of the nozzle group, recorded as single scan image data, includes: Obtaining the image accuracy of the image to be printed; Get the single printing accuracy of the nozzle group; Determine the number of scans according to the image accuracy and the single printing accuracy; The single scan image data is acquired according to the scan times and the image data of the image to be printed.

6. The resident printing method based on concentration curve according to claim 1, characterized in that: After controlling the nozzle group to scan and discharge ink along the main scanning direction according to the single scanning image data and the preset concentration curve, the nozzle group moves the first step height along the sub-scanning direction perpendicular to the main scanning direction, and then scans and discharges ink along the main scanning direction according to the single scanning image data and the preset concentration curve, including: Acquire a feathering template according to the preset concentration curve; ANDing the single scan image data with the feathering template to obtain first sub single scan image data; Controlling the nozzle group to scan and discharge ink along the main scanning direction according to the first sub-single scanning image data; Controlling the nozzle group to move the first step height along the secondary scanning direction; Inverting the first sub-single-scan image data to obtain second sub-single-scan image data; The nozzle group is controlled to scan and discharge ink along the main scanning direction according to the second sub-single scanning image data.

7. The resident printing method based on concentration curve according to claim 1, characterized in that: When the image height of the image to be printed along the secondary scanning direction is greater than or equal to the effective printing height, wherein the effective printing height is equal to the number of scans multiplied by the average effective height of the single nozzle minus the first advance height, the method further includes: After the nozzle group completes scanning and printing of the current image printing area according to the scanning times, it moves a second step height along the secondary scanning direction to the next printing area; wherein the second step height is equal to the effective printing height; Acquire image data corresponding to each scan of the next printing area by the nozzle group, and record it as the next single scan image data; After controlling the nozzle group to scan and discharge ink along the main scanning direction according to the next single scanning image data and the preset concentration curve, the nozzle group moves along the sub-scanning direction by the distance of the first step height, and then scans and discharges ink along the main scanning direction according to the next single scanning image data and the preset concentration curve.

8. A resident printing device based on a concentration curve, characterized in that: The device comprises: An overlapping nozzle number acquisition module is used to acquire the number of overlapping nozzles in the nozzle splicing area in the nozzle group; A single nozzle average effective height acquisition and determination module, used to determine the single nozzle average effective height according to the number of overlapping nozzles; A first step height acquisition module, used to acquire the first step height according to the average effective height of the single nozzle; A preset concentration curve determining module, used to determine a preset concentration curve according to the first step height; A single scan image data acquisition module is used to acquire the image data of each scan of the nozzle group, which is recorded as single scan image data; The printing module is used to control the nozzle group to scan and discharge ink along the main scanning direction according to the single scanning image data and the preset concentration curve, move the first step height along the sub-scanning direction perpendicular to the main scanning direction, and then scan and discharge ink along the main scanning direction according to the single scanning image data and the preset concentration curve.

9. A resident printing device based on a concentration curve, characterized in that: include: At least one processor, at least one memory and computer program instructions stored in the memory, when the computer program instructions are executed by the processor, implement the method according to any one of claims 1 to 7.

10. A storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the method according to any one of claims 1 to 7 is implemented.

Images