CN113928011B - Ink-jet printing color difference adjusting method, device, equipment and storage medium - Google Patents
Ink-jet printing color difference adjusting method, device, equipment and storage medium Download PDFInfo
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- CN113928011B CN113928011B CN202010603785.7A CN202010603785A CN113928011B CN 113928011 B CN113928011 B CN 113928011B CN 202010603785 A CN202010603785 A CN 202010603785A CN 113928011 B CN113928011 B CN 113928011B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
Abstract
The invention belongs to the technical field of printing equipment, solves the technical problem that the image printing effect is influenced by color difference generated by ink outlet difference of a local nozzle in the prior art, and provides an ink-jet printing color difference adjusting method, device, equipment and storage medium. The method for adjusting the color difference of ink-jet printing comprises controlling a nozzle to perform monochromatic printing to obtain a test image; acquiring color density difference information of the test image; processing original printing data according to the color density difference information of the test image to obtain target printing data; and controlling the spray head to print the image to be printed according to the target printing data. The invention also comprises a device, equipment and a storage medium for executing the method. The invention adjusts the printing data corresponding to the abnormal area image by carrying out monochromatic test printing, eliminates the image chromatic aberration and ensures the effect of printing the image.
Description
Technical Field
The invention relates to the field of printing equipment, in particular to an ink-jet printing color difference adjusting method, device, equipment and storage medium.
Background
The ink jet printing technology refers to a technology of ejecting ink droplets through nozzles on an ejection head onto a printing medium to obtain an image or characters.
As shown in fig. 1, in order to improve dot density and printing efficiency of a printed image, a printer head generally consists of a plurality of rows of nozzles; as shown in fig. 2, in order to increase the coverage of more areas (i.e. the printable height per scan) by one scan of the heads, each head is composed of 4 small rows of nozzles spliced together, and the amount of ink ejected from each hole of the head is not exactly the same due to the manufacturing difference of each hole of the nozzles, resulting in color difference of the printed images.
In the prior art, the adjustment of the chromatic aberration of the nozzle is realized by adjusting the driving voltage (namely, the driving waveform) of the nozzle, the method can only carry out integral pressure adjustment on one nozzle or one row of nozzles (namely, between the nozzle and the nozzle or between each row of nozzles and the nozzles), and the problems of chromatic aberration of a printed image and the printing effect of sound caused by different characteristics of partial nozzles cannot be adjusted.
Disclosure of Invention
In view of this, embodiments of the present invention provide an inkjet printing color difference adjustment method, apparatus, device and storage medium, so as to solve the technical problem that the effect of printing an image is affected by a color difference generated by an ink discharging difference of a local nozzle.
The technical scheme adopted by the invention is as follows:
the invention provides an ink-jet printing color difference adjusting method, which comprises the following steps:
s1: controlling a spray head to perform monochromatic printing to obtain a test image;
s2: acquiring color density difference information of the test image;
s3: processing original printing data according to the color density difference information of the test image to obtain target printing data;
s4: and controlling the spray head to print the image to be printed according to the target printing data.
Preferably, the S3 includes:
s31: acquiring an abnormal image area corresponding to the color density difference information and print data corresponding to the abnormal image area;
s32: and adjusting the ink quantity of the ink-jet ink points and/or the number of the ink-jet ink points of the printing data corresponding to the color density abnormal area.
Preferably, when printing a plurality of ink jet dots, in S32, the method includes:
s3201: acquiring the number n of the types of the ink jet ink dots and the number of each type of the ink jet ink dots;
s3202: adjusting the ink amount of the ink jet ink dots by adjusting the types of the ink jet ink dots according to the color density of the abnormal image area; and/or adjusting the number of at least one ink jet ink dot according to the color density of the abnormal image area;
wherein n is a positive integer.
Preferably, in said S32,
s3211: acquiring the color density corresponding to the normal image area of the test image as the threshold ink amount density;
s3212: comparing the color density of the abnormal image area with the threshold ink amount density;
s3213: if the color density of the abnormal image area is greater than the threshold ink amount density, reducing the ink amount of the ink jet ink dots in the abnormal image area;
s3214: and if the color density of the abnormal image area is less than the threshold ink amount density, increasing the ink amount of the ink jet ink dots in the abnormal image area.
Preferably, the ink-jet dots for printing the image to be printed include a first dot, a second dot, and a third dot; the ink amount of the first ink dot is larger than the ink jet ink amount of the second ink dot, and the ink jet ink amount of the second ink dot is larger than the ink jet ink amount of the third ink dot;
in S3213, if an abnormal image area is printed by the first dot, adjusting an inkjet dot to the second dot and/or the third dot; if the abnormal image area is printed by the second ink dot, adjusting the ink jet ink dot to be the third ink dot;
in S3214, if the abnormal image area is printed by the third dot, adjusting the inkjet dot to the first dot and/or the second dot; and if the abnormal image area is printed by the second ink dot, adjusting the ink jet ink dot to be the first ink dot.
Preferably, the S32 includes:
s3221: acquiring the number of various ink-jet ink dots in the color density abnormal area;
s3222: acquiring the quantity adjustment proportion of various ink jet dots;
s3223: and respectively adjusting the quantity of each ink jet ink dot according to the quantity adjustment proportion of each type of ink jet ink dot.
Preferably, if the printing is performed for a single inkjet dot, in S302, the number of inkjet dots of the printing data corresponding to the color density abnormal area is adjusted.
The present invention also provides a printing apparatus comprising:
the test printing module: the device is used for controlling the spray head to perform monochromatic printing to obtain a test image;
a test analysis module: the color density difference information of the test image is obtained;
a data adjusting module: the system is used for processing original printing data according to the color density difference information of the test image to obtain target printing data;
a target printing module: and the printing control module is used for controlling the spray head to print the image to be printed according to the target printing data.
The present invention also provides a printing apparatus comprising: at least one processor, at least one memory, and computer program instructions stored in the memory that, when executed by the processor, implement the method of any of the above.
The invention also provides a storage medium having computer program instructions stored thereon, which when executed by a processor implement the method of any one of the above.
In conclusion, the beneficial effects of the invention are as follows:
the invention provides an ink-jet printing color difference adjusting method, device, equipment and storage medium, which are used for solving the technical problem that the effect of printing images is influenced by color difference generated by ink outlet difference of local nozzles.
The beneficial effects are that:
according to the invention, the nozzles are subjected to monochromatic test printing, the ink jet concentration of the ink jet ink points in the nozzles can be obtained according to the color concentration difference information of the test image, and then the printing data corresponding to the abnormal region image is adjusted, so that the ink jet ink amount of the abnormal image region is adjusted, and the effect of printing the image is ensured.
Beneficial effects 2:
according to the invention, the single-color test printing is carried out on the spray head, the ink jet concentration of the ink jet ink points in the spray head can be obtained according to the color concentration difference information of the test image, and then the printing data corresponding to the abnormal area image is adjusted, so that the ink jet difference of the nozzles of the spray head caused by the manufacturing difference is eliminated; the color difference of the spray head under the condition of normal ink jet is prevented; the printing quality of the equipment is improved, and the product popularization is facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, without any creative effort, other drawings may be obtained according to the drawings, and these drawings are all within the protection scope of the present invention.
FIG. 1 is a schematic diagram of a nozzle arrangement of a showerhead according to the background art of the present invention;
FIG. 2 is a schematic view of another arrangement of nozzles of the showerhead according to the background art of the present invention;
FIG. 3 is a flowchart of an ink-jet printing color difference adjustment method according to embodiment 1 of the present invention;
FIG. 4 is a test diagram of a printing test in the inkjet printing color difference adjustment method according to embodiment 1 of the present invention;
FIG. 5 is a flowchart illustrating adjustment of color density difference information in the method for adjusting color difference in inkjet printing according to embodiment 1 of the present invention;
FIG. 6 is a flow chart illustrating adjustment of color density difference information for printing of multiple ink jet dots according to the method for adjusting color difference in ink jet printing of embodiment 1 of the present invention;
FIG. 6-1 is a flow chart of ink amount of multiple adjustment ink jet dots in the ink jet printing color difference adjustment method according to embodiment 1 of the present invention;
FIG. 6-2 is a flow chart of adjusting the number of ink-jet dots in the method for adjusting color difference in ink-jet printing according to embodiment 1 of the present invention;
FIG. 7 is a schematic view of an inkjet printing mode of different nozzles of the inkjet printing color difference adjustment method according to embodiment 1 of the present invention;
FIG. 8 is a flowchart of an ink-jet printing color difference adjustment apparatus according to embodiment 2 of the present invention;
fig. 9 is a schematic configuration diagram of a printing apparatus in embodiment 3 of the present invention.
Parts and numbering in the drawings:
1. a spray head; 2. a nozzle; 21. a first dot; 22. a second dot; 23. a third dot; 3. a print medium; 4. and testing the image.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is noted that, herein, relational terms such as first and second, and the like may be 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 is to 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 those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element. In case of conflict, it is intended that the embodiments of the present invention and the individual features of the embodiments may be combined with each other within the scope of the present invention.
As shown in fig. 4, on the premise that the dot densities of the initial print data of the area a and the area b are the same, that is, the resolutions are the same, the color difference exists between the images of the area a and the area b due to the difference generated by the nozzle manufacturing of the head, the area a indicates that the color of the image is dark, the area b indicates that the color of the image is light, and specifically, the amount of ink ejected by the nozzles is not equal, so that the color difference occurs.
For the convenience of understanding herein, the following explanation is now made:
single inkjet dot printing: the printed image is formed by ink-jet printing of one ink-jet dot, with and/or without ink, e.g. a test image printed entirely with the first ink dot;
multiple inkjet dot printing: the printed image is formed by ink discharge and/or ink non-discharge matched ink-jet printing of a plurality of ink-jet ink dots with different ink-jet ink amounts, such as a test image printed by at least two ink dots of a first ink dot, a second ink dot and a third ink dot.
Example 1:
as shown in fig. 3, embodiment 1 of the present invention discloses an inkjet printing color difference adjustment method, including:
s1: controlling a spray head to perform monochromatic printing to obtain a test image;
s2: acquiring color density difference information of the test image;
s3: processing original printing data according to the color density difference information of the test image to obtain target printing data;
s4: and controlling the spray head to print the image to be printed according to the target printing data.
For a multi-pass printing mode, acquiring original printing data corresponding to each scanning of the sprayer 1 in a printing scanning direction, determining ink jet dot conditions of the sprayer 1 in an abnormal image area and a normal image area, acquiring color difference data of the ink jet dots of the normal image area and the abnormal image area according to a test image, and adjusting (increasing or decreasing) the ink jet dots of the original printing data to obtain target printing data.
For the Onepass printing mode, original printing data corresponding to the spray head 1 is directly obtained, color difference data of ink jet ink dots in an abnormal image area and a normal image area is obtained according to a test image, and the ink jet ink dots of the original printing data are adjusted (increased or decreased) to obtain target printing data.
Specifically, for example, printing is performed by using colors in CMYK4, where C represents cyan, M represents magenta, Y is yellow, and K is black; or other single-color colors are respectively subjected to test printing, one color is adopted for printing each time, different colors in 4 are printed in different areas on the same printing medium or different printing media, a test chart printed by each color has color density difference due to the self physical error of the spray head 1, as shown in fig. 4, the position of each ink dot printed by each spray head 1 and the color difference condition are obtained according to the color density difference information, it needs to be noted that the printing medium 3 is preferably the test printing medium, because the test printing medium is provided with marks convenient for statistics, such as scales, brightness and the like, and the test printing medium can be used for multiple times.
From the test image 4, it can be seen that there is a color difference between the test image printed by the nozzles in the area a of the head 1 and the test image printed by the nozzles in the area b of the head 1, the image in the area a is obviously darker than the image b in color, the image in the area b is used as a normal density image area, and the image in the area a is used as an abnormal density image area; adjusting the ink dot concentration of the nozzles in the area a according to the color concentration difference of the images in the area a and the area b, wherein the adjustment can be repeated for multiple times to obtain a printing test image without color difference; then, the difference between the ink discharge density of the nozzles in the corresponding area a and the ink discharge density of the nozzles in the corresponding area b of the print test image without color difference is used as the image density difference (which may be used as the adjustment amount of the image density difference of the present print job or as the base amount, and the base amount is added to the print job at each printing).
In one embodiment, a specific implementation of a method for adjusting color difference in inkjet printing is provided;
as shown in fig. 5, the S3 includes:
s31: acquiring an abnormal image area corresponding to the color density difference information and print data corresponding to the abnormal image area;
s32: and adjusting the ink quantity of the ink jet ink points and/or the number of the ink jet ink points of the printing data corresponding to the color density abnormal area.
In one embodiment, a specific implementation of a method for adjusting color difference in inkjet printing is provided;
preferably, as shown in fig. 6, when printing a plurality of inkjet dots, in S32, the method includes:
s3201: acquiring the type number n of the ink jet ink dots and the number of each ink jet ink dot;
s3202: adjusting the ink amount of the ink jet ink dots by adjusting the types of the ink jet ink dots according to the color density of the abnormal image area; and/or adjusting the number of at least one ink jet ink dot according to the color density of the abnormal image area;
wherein n is a positive integer.
In one embodiment, a specific implementation of a method for adjusting color difference in inkjet printing is provided;
preferably, as shown in fig. 6-1, in the S32,
s3211: acquiring the color density corresponding to the normal image area of the test image as the threshold ink amount density;
s3212: comparing the color density of the abnormal image area with the threshold ink amount density;
s3213: if the color density of the abnormal image area is greater than the threshold ink amount density, reducing the ink amount of the ink jet ink dots in the abnormal image area;
s3214: and if the color density of the abnormal image area is less than the threshold ink amount density, increasing the ink amount of the ink jet ink dots in the abnormal image area.
Preferably, the ink-jet dots for printing the image to be printed include a first dot, a second dot, and a third dot; the ink amount of the first ink dot is larger than the ink jet ink amount of the second ink dot, and the ink jet ink amount of the second ink dot is larger than the ink jet ink amount of the third ink dot;
in S3213, if an abnormal image area is printed by the first dot, adjusting an inkjet dot to the second dot and/or the third dot; if the abnormal image area is printed by the second ink dot, adjusting the ink jet ink dot to be the third ink dot;
in S3214, if the abnormal image area is printed by the third dot, adjusting the inkjet dot to the first dot and/or the second dot; and if the abnormal image area is printed by the second ink dot, adjusting the ink jet ink dot to be the first ink dot.
Specifically, the density of the ink jet ink amount of the abnormal image area is judged according to the printing test image, if the density is greater than the threshold value, the specification of the ink jet ink dots is adjusted to the ink jet ink dots with low ink jet ink amount density, as shown in fig. 7, the nozzles 2 of the head 1 are divided into the nozzles of the first ink dots 21, the second ink dots 22 and the third ink dots 23; assuming that the test image 4 of fig. 4 is printed for the first dot 21 of the nozzle 2, the image data of the area a can be adjusted to be printed by the second dot 22 of the nozzle 2 or by the third dot 23 of smaller ink ejection dot, thereby eliminating the color difference.
In one embodiment, a specific implementation of a method for adjusting color difference in inkjet printing is provided;
preferably, as shown in fig. 6-2, the S32 includes:
s3221: acquiring the number of various ink-jet ink dots in the color density abnormal area;
s3222: acquiring the quantity adjustment proportion of various ink jet dots;
s3223: and respectively adjusting the quantity of each type of ink jet ink dots according to the quantity adjustment proportion of each type of ink jet ink dots.
Specifically, the abnormal density image area of the test image 4 is set to include 1000 ink jet dots; if the nozzle for printing the test image is an nbit type nozzle, taking a 2-bit nozzle as an example, the 1000 ink-jet dots include 330 third ink dots 23, 330 second ink dots 22 and 340 first ink dots 21, and the three ink-jet dots are uniformly distributed, similarly, if 100 ink-out dots need to be reduced, the 1000 ink-out dots are divided into 10 parts, 10 dots are reduced from each part, the 10 dots are uniformly divided into three ink-jet dots, that is, the third ink dot 23 of each ink-jet dot is reduced by 3 ink-out dots, the second ink dot 22 is reduced by 3 ink-out dots, and the first ink dot 21 is reduced by 4 ink-out dots; if 100 ink output points need to be added, dividing 1000 ink output points into 10 parts, adding 10 points from each part, and uniformly dividing the 10 points into three ink jet points, namely adding 3 ink output points to the third ink point 23, adding 3 ink output points to the second ink point 22 and adding 4 ink output points to the first ink point 21.
Specifically, when the abnormal density image area adopts the mode of reducing or increasing the ink output points, the ink output points are increased or reduced in the percentage mode of the total ink output points; taking 1000 dots as an example, the number of dots to be printed may be adjusted by 10% for each adjustment (not limited to this ratio adjustment), and may be based on the initial dots or based on the adjusted dots.
In case 1, when the number of initial ink output dots is used as the adjustment base number, the first adjustment number is 100 ink output dots, and the total number of ink output dots becomes 1100; or reducing 100 ink output points, and changing the total number of the ink output points into 900; the number of the second adjustment is still increased by 100 ink outlet points, and the total number of the ink outlet points is changed into 1200; or reducing 100 touch points, changing the total number of ink outlet points into 800, and the like until the requirement is met.
In one embodiment, a specific implementation of a method for adjusting color difference in inkjet printing is provided;
preferably, if the printing is performed for a single inkjet dot, in S302, the number of inkjet dots of the printing data corresponding to the color density abnormal area is adjusted.
Specifically, the abnormal density image area of the test image 4 is set to include 1000 ink ejection dots; if the nozzle for printing the test image is a 1bit type nozzle, the 1000 ink jet points correspond to 1000 ink outlet points; if the nominal number of ink output points is uniformly reduced from the 1000 ink output points, for example, 100 ink output points need to be reduced, the 1000 ink output points are divided into 10 parts, and 10 ink output points are reduced from each part; if 100 ink output points need to be added, dividing 1000 ink output points into 10 parts, and adding 10 ink output points in each part.
By adopting the inkjet printing color difference adjustment method in embodiment 1, monochrome test printing is performed on the nozzle, according to the color density difference information of the test image, which areas of the nozzle have the inkjet density of the inkjet dots that does not meet the requirement can be obtained, and then the print data corresponding to the abnormal area image is adjusted, specifically, the number of the inkjet dots and/or the types of the inkjet dots can be adjusted, so that the adjustment of the inkjet ink amount of the abnormal image area is completed, and the effect of printing the image is ensured.
Meanwhile, monochrome test printing is carried out on the spray head, according to the color density difference information of the test image, the ink jet density of ink jet ink points in which areas in the spray head do not meet the requirement can be obtained, then the print data corresponding to the abnormal area image is adjusted, and the ink jet difference of the spray nozzles of the spray head caused by manufacturing difference is eliminated; the color difference of the spray head under the condition of normal ink jet is prevented; the printing quality of the equipment is improved, the printing efficiency can be improved, and resources can be saved.
Example 2
The present invention also provides a printing apparatus, as shown in fig. 8, including:
the test printing module: the device is used for controlling the spray head to perform monochromatic printing to obtain a test image;
a test analysis module: the color density difference information of the test image is obtained;
a data adjusting module: the system is used for processing original printing data according to the color density difference information of the test image to obtain target printing data;
a target printing module: and the printing control module is used for controlling the spray head to print the image to be printed according to the target printing data.
Example 3:
In particular, the processor may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits that may be configured to implement embodiments of the present invention.
The memory may include mass storage for data or instructions. By way of example, and not limitation, memory may include a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, magnetic tape, or Universal Serial Bus (USB) Drive or a combination of two or more of these. The memory may include removable or non-removable (or fixed) media, where appropriate. The memory may be internal or external to the data processing apparatus, where appropriate. In a particular embodiment, the memory is non-volatile solid-state memory. In a particular embodiment, the memory includes Read Only Memory (ROM). Where appropriate, 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.
The processor reads and executes the computer program instructions stored in the memory to realize the method for adjusting the color difference of the ink-jet printing in the embodiment 1.
In one example, the printing device may also include a communication interface and a bus. The processor, the memory and the communication interface are connected through a bus and complete mutual communication.
The communication interface is mainly used for realizing communication among modules, devices, units and/or equipment in the embodiment of the invention.
The bus includes hardware, software, or both that couple the components of the printing device to one another. By way of example, and not limitation, a bus 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 these. A bus may include one or more buses, where appropriate. Although specific buses have been described and shown in the embodiments of the invention, any suitable buses or interconnects are contemplated by the invention.
Example 4
In addition, in combination with the inkjet printing color difference adjustment method in embodiment 1, an embodiment of the present invention can be implemented by providing a computer-readable storage medium. The computer readable storage medium having stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement any of the inkjet printing color difference adjustment methods of embodiment 1 above.
In summary, the embodiments of the present invention provide a method, an apparatus, a device, and a storage medium for adjusting color difference in inkjet printing.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, 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 so forth. The code segments may be downloaded via computer networks such as the internet, intranets, etc.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. An ink-jet printing color difference adjusting method is characterized by comprising the following steps:
s1: controlling a spray head to perform monochromatic printing to obtain a test image;
s2: acquiring color density difference information of the test image;
s3: processing original printing data according to the color density difference information of the test image to obtain target printing data; the target printing data is obtained by acquiring color difference data of ink jet ink dots in a normal image area and an abnormal image area according to a test image and adjusting the ink jet ink dots of original printing data; the S3 comprises the following steps:
s31: acquiring an abnormal image area corresponding to the color density difference information and print data corresponding to the abnormal image area;
s32: adjusting the ink quantity of ink-jet ink dots and/or the number of the ink-jet ink dots of the printing data corresponding to the abnormal image area; in the S32, the method includes:
s3211: acquiring the color density corresponding to the normal image area of the test image as the threshold ink amount density;
s3212: comparing the color density of the abnormal image area with the threshold ink amount density;
s3213: if the color density of the abnormal image area is greater than the threshold ink amount density, reducing the ink amount of the ink jet ink dots in the abnormal image area;
s3214: if the color density of the abnormal image area is smaller than the threshold ink amount density, increasing the ink amount of the ink jet ink dots of the abnormal image area;
s3221: acquiring the number of various ink-jet ink dots in the color density abnormal area;
s3222: acquiring the quantity adjustment proportion of various ink jet dots;
s3223: adjusting the quantity of each type of ink-jet ink dots according to the quantity adjustment proportion of each type of ink-jet ink dots;
s4: and controlling the spray head to print the image to be printed according to the target printing data.
2. The method for adjusting color difference in inkjet printing according to claim 1, wherein if there are a plurality of types of inkjet dots to be printed, in step S32, the method further comprises:
s3201: acquiring the type number n of the ink jet ink dots and the number of each ink jet ink dot;
s3202: adjusting the ink amount of the ink jet ink dots by adjusting the types of the ink jet ink dots according to the color density of the abnormal image area; and/or adjusting the number of at least one ink jet ink dot according to the color density of the abnormal image area;
wherein n is a positive integer.
3. The ink jet printing color difference adjustment method according to claim 1, wherein ink jet dots for printing an image to be printed include a first dot, a second dot, and a third dot; the ink amount of the first ink dot is larger than the ink jet ink amount of the second ink dot, and the ink jet ink amount of the second ink dot is larger than the ink jet ink amount of the third ink dot;
in S3213, if the abnormal image area is printed by the first dot, adjusting the inkjet dots to the second dot and/or the third dot; if the abnormal image area is printed by the second ink dot, adjusting the ink jet ink dot to be the third ink dot;
in S3214, if the abnormal image area is printed by the third dot, adjusting the inkjet dot to the first dot and/or the second dot; and if the abnormal image area is printed by the second ink dot, adjusting the ink jet ink dot to be the first ink dot.
4. The method for adjusting color difference in inkjet printing according to claim 1, wherein if the printing is performed by a single inkjet dot, in step S32, the number of inkjet dots of the print data corresponding to the color density abnormal area is adjusted.
5. A printing apparatus, comprising:
the test printing module: the device is used for controlling the spray head to perform monochromatic printing to obtain a test image;
a test analysis module: the color density difference information of the test image is obtained;
a data adjusting module: the system is used for processing original printing data according to the color density difference information of the test image to obtain target printing data; wherein the data adjustment module is further configured to:
acquiring an abnormal image area corresponding to the color density difference information and printing data corresponding to the abnormal image area, wherein the target printing data is obtained by acquiring color difference data of ink jet dots of a normal image area and an abnormal image area according to a test image and adjusting the ink jet dots of original printing data; the data adjustment module is further configured to:
adjusting the ink amount of the ink jet ink dots and/or the number of the ink jet ink dots of the printing data corresponding to the abnormal image area, further comprising:
acquiring the color density corresponding to the normal image area of the test image as the threshold ink amount density;
comparing the color density of the abnormal image area with the threshold ink amount density;
if the color density of the abnormal image area is greater than the threshold ink amount density, reducing the ink amount of the ink jet ink dots in the abnormal image area;
if the color density of the abnormal image area is smaller than the threshold ink amount density, increasing the ink amount of the ink jet ink dots of the abnormal image area;
acquiring the number of various ink-jet ink dots in the color density abnormal area;
acquiring the quantity adjustment proportion of various ink jet dots;
adjusting the quantity of each type of ink-jet ink dots according to the quantity adjustment proportion of each type of ink-jet ink dots;
a target printing module: and the printing control module is used for controlling the spray head to print the image to be printed according to the target printing data.
6. A printing apparatus, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, which when executed by the processor, implement the method of any one of claims 1-4.
7. A storage medium having computer program instructions stored thereon, which when executed by a processor implement the method of any one of claims 1-4.
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| CN202010603785.7A CN113928011B (en) | 2020-06-29 | 2020-06-29 | Ink-jet printing color difference adjusting method, device, equipment and storage medium |
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| JP2003211708A (en) * | 2002-01-16 | 2003-07-29 | Canon Inc | Ink-jet recording apparatus, and ink-jet recording method |
| JP2006248215A (en) * | 2005-02-14 | 2006-09-21 | Seiko Epson Corp | Printing device, printing device controlling program, printing device controlling method, printing data generating device, printing data generating program, and printing data generating method |
| JP2006231735A (en) * | 2005-02-25 | 2006-09-07 | Seiko Epson Corp | Image processor, image processing method, control program, and recorder |
| KR101326150B1 (en) * | 2009-09-02 | 2013-11-06 | 가부시키가이샤 미마키 엔지니어링 | Inkjet Printer, Printing Method, Method for Producing Print Deliverable, and Print Deliverable |
| US8711453B2 (en) * | 2010-05-24 | 2014-04-29 | Canon Kabushiki Kaisha | Data processing apparatus and data processing method for reducing an uneven color made up of two or more ink colors |
| JP5780736B2 (en) * | 2010-10-05 | 2015-09-16 | キヤノン株式会社 | Image processing apparatus and image processing method |
| JP5311688B2 (en) * | 2011-01-07 | 2013-10-09 | 富士フイルム株式会社 | Density unevenness correction value calculation method, image processing method, and image processing apparatus |
| US8827403B2 (en) * | 2011-10-20 | 2014-09-09 | Seiko Epson Corporation | Printing apparatus and printing method |
| CN110171203B (en) * | 2018-02-19 | 2020-12-22 | 海德堡印刷机械股份公司 | Method for compensating for malfunctioning printing nozzles in an inkjet printer |
| JP6541858B1 (en) * | 2018-10-30 | 2019-07-10 | 株式会社トライテック | Ink density error correction method in ink jet printing apparatus |
| CN110202933B (en) * | 2019-06-20 | 2021-01-01 | 森大（深圳）技术有限公司 | Method, device, equipment and medium for adjusting ink output to compensate abnormal nozzle |
| CN110843345B (en) * | 2019-11-15 | 2020-11-24 | 深圳市汉森软件有限公司 | Ink output amount adjusting method, device, equipment and storage medium |
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