CN116353210A - Color difference detection and calibration method, device, equipment and storage medium between nozzles - Google Patents

Abstract

The invention belongs to the technical field of inkjet printing, solves the problems of low detection efficiency of color difference between nozzles and poor calibration effect in the prior art, and provides a method, device, equipment and storage medium for detecting and calibrating color difference between nozzles. The method includes: printing the nozzle color difference detection diagram; when the printed nozzle color difference detection diagram does not meet the first preset condition, when the printed nozzle color difference detection diagram does not meet the first preset condition , according to the preset selection rules, select a nozzle among all the nozzles as the reference nozzle; obtain and print the nozzle color calibration chart, and determine the ink volume adjustment parameters of the nozzles other than the reference nozzle according to the printed nozzle color calibration diagram; The ink volume adjustment parameter is to adjust the parameters of the nozzles other than the reference nozzles. The invention can quickly and efficiently detect and calibrate the color difference between the nozzles.

Description

Color difference detection and calibration method, device, equipment and storage medium between nozzles

technical field

The invention relates to the field of color difference detection and calibration between nozzles, in particular to a color difference detection and calibration method, device, equipment and storage medium between nozzles.

Background technique

Inkjet printing technology refers to the technology of spraying ink droplets onto the printing medium through the nozzles on the nozzle to obtain images or text. Reciprocating scanning printing is an important printing method in inkjet printing. Due to the height and precision of common printing nozzles Limitations, in order to increase the height of nozzle scanning and printing, common methods use multiple nozzles to print to improve printing efficiency.

However, due to the physical properties of the nozzles, different nozzles may print different colors in the same environment and the same ink, resulting in color differences in the overall image. In the printing industry, color effect is one of the evaluation criteria for print quality, but different people have different degrees of color recognition. People with a high degree of color recognition can quickly see whether there is color difference in the image printed by multi-nozzles, but for color People with a low degree of recognition cannot quickly locate whether there is color difference in the multi-printed image.

At present, the common solution is to adjust the nozzle color by modifying the nozzle voltage, so that the colors of multiple nozzles are roughly the same as possible, but this adjustment method is always limited, it cannot be adjusted in a large scale, and it may also reduce the printing accuracy.

Contents of the invention

In view of this, the embodiments of the present invention provide a color difference detection and calibration method, device, equipment and storage medium among nozzles to solve the problems of low detection efficiency of color difference between nozzles and poor calibration effect in the prior art.

In the first aspect, an embodiment of the present invention provides a method for detecting and calibrating color difference between nozzles, characterized in that the method includes:

S1: print the print head color difference detection map, wherein the print head color difference detection map includes several gradient color blocks, and the ink volume value of each gradient color block is different;

S2: When the printed nozzle color difference detection map does not meet the first preset condition, select a nozzle among all the nozzles as a reference nozzle according to a preset selection rule;

S3: Obtain a print head color calibration map, wherein the print head color calibration map includes several calibration color blocks, and each of the calibration color blocks includes different ink volume adjustment parameters;

S4: According to the ink quantity adjustment parameter, control all the nozzles to print the color calibration chart of the nozzles respectively;

S5: Determine the ink volume adjustment parameters of the nozzles other than the reference nozzle according to the printed nozzle color calibration chart;

S6: Adjust the nozzle parameters of the nozzles other than the reference nozzle according to the ink volume adjustment parameter.

Preferably, the print head color difference detection map includes:

According to the size of the nozzle, the color difference detection map of the nozzle is obtained, wherein the size of the color difference detection map of the nozzle is greater than or equal to the sum of the sizes of all the nozzles, and the ink volume value is obtained from the color difference detection map of the nozzle. The gradient color block in the middle increases or decreases towards both ends;

Print the color difference detection chart of the nozzle.

Preferably, when the printed nozzle color difference detection map does not meet the first preset condition, selecting a nozzle among all the nozzles as a reference nozzle according to a preset selection rule includes:

Obtain the nozzle ink volume parameters of each nozzle;

When the average value of the nozzle ink quantity parameter is greater than the preset ink quantity parameter, select the nozzle corresponding to the lightest gradient color block in the printed nozzle color difference detection diagram as the reference nozzle;

When the average value of the nozzle ink quantity parameter is greater than the preset ink quantity parameter, the nozzle corresponding to the darkest gradient color block in the printed nozzle color difference detection diagram is selected as the reference nozzle.

Preferably, the calibration color patch includes a first calibration color patch and a second calibration color patch, the ink quantity adjustment parameter of the first calibration color patch is a negative number, and the ink quantity adjustment parameter of the second calibration color patch is a positive number number, the acquisition of the nozzle color calibration map includes:

When the average value of the ink quantity parameter of the nozzle is greater than the preset ink quantity parameter, obtain a nozzle color calibration chart in which the number of the first calibration color patches is greater than the number of the second calibration color patches;

When the average value of the ink quantity parameter of the nozzle is greater than the preset ink quantity parameter, a nozzle color calibration chart having a quantity of the first calibration color patches smaller than a quantity of the second calibration color patches is obtained.

Preferably, said step S4 includes:

controlling the reference nozzle to print the nozzle color calibration chart;

Record the nozzles other than the reference nozzles as the first nozzles, adjust the ink volume parameters of the first nozzles according to the ink volume adjustment parameters corresponding to the calibration color blocks and print the corresponding calibration color blocks until all the first nozzles complete the Printing of printhead color calibration chart.

Preferably, the step S5: according to the printed nozzle color calibration chart, determining the ink volume adjustment parameters of the nozzles other than the reference nozzle includes:

Note that the calibration color patch printed by the reference nozzle is the reference color patch, the calibration color patch printed by the first nozzle is the third calibration color patch, and the reference color patch and all the third calibration color patches are Blocks are compared to determine the third calibration color block identical to the color value of the reference color block, which is recorded as the fourth calibration color block;

Determine the ink quantity adjustment parameter corresponding to the fourth calibration color block.

Preferably, the method also includes after step S6:

S7: reprinting the color difference detection diagram of the nozzle;

S8: When the reprinted print head color calibration does not meet the first preset condition, repeat steps S2-S7 until the print head color difference detection chart that satisfies the first preset condition is printed.

In the second aspect, the embodiment of the present invention provides a color difference detection and calibration device between nozzles, characterized in that the device includes:

The nozzle color difference detection map printing module is used to print the nozzle color difference detection map, wherein the nozzle color difference detection map includes several gradient color blocks, and the ink volume value of each gradient color block is different;

A reference nozzle selection module, configured to select a nozzle among all the nozzles as a reference nozzle according to a preset selection rule when the printed nozzle color difference detection map does not meet the first preset condition;

The nozzle color calibration diagram acquisition module is used to obtain the nozzle color calibration diagram, wherein the nozzle color calibration diagram includes several calibration color blocks, and each of the calibration color blocks includes different ink volume adjustment parameters;

The nozzle color calibration chart printing module is used to control all the nozzles to print the nozzle color calibration chart according to the ink volume adjustment parameters;

The ink volume adjustment parameter determination module is used to determine the ink volume adjustment parameters of the nozzles other than the reference nozzle according to the printed nozzle color calibration chart;

The printhead parameter adjustment module is used to adjust the printhead parameters of the printheads other than the reference printhead according to the ink quantity adjustment parameter.

In a third aspect, an embodiment of the present invention provides a color difference detection and calibration device between nozzles, including: 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, the As in the method of the first aspect in the above-mentioned embodiment.

In a fourth aspect, an embodiment of the present invention provides a storage medium on which computer program instructions are stored, and when the computer program instructions are executed by a processor, the method in the first aspect of the above implementation manner is implemented.

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

The color difference detection and calibration method, device, equipment, and storage medium between nozzles provided by the embodiments of the present invention, firstly, by obtaining and printing the color difference detection map of the nozzles, it is judged whether the printed color difference detection map of the nozzles satisfies the first preset condition , can quickly and efficiently detect whether there is a color difference between the nozzles; secondly, when the printed nozzle color difference detection map does not meet the first preset condition, select a nozzle among all the nozzles as a reference according to the preset selection rule For the nozzle, obtain the color calibration diagram of the nozzle, the color calibration diagram of the nozzle includes several calibration color blocks, each of which includes different ink volume adjustment parameters; print the color calibration diagram of the nozzle according to the ink volume adjustment parameters ;According to the printed nozzle color calibration chart, determine the ink volume adjustment parameters of the nozzles other than the reference nozzle and adjust the parameters of the nozzles other than the reference nozzle, so as to quickly calibrate the printing color difference between the nozzles.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the embodiments of the present invention. Other drawings can be obtained according to these drawings, and these are all within the protection scope of the present invention.

FIG. 1 is a schematic flowchart of a method for detecting and calibrating color difference between nozzles according to Embodiment 1 of the present invention.

Fig. 2 is a detection diagram of the color difference of the nozzle in the embodiment 1 of the present invention.

FIG. 3 is a color calibration diagram of the print head printed in Embodiment 1 of the present invention.

Fig. 4 is a schematic structural diagram of a color difference detection and calibration device between print heads according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a color difference detection and calibration device between print heads according to an embodiment of the present invention.

Detailed ways

The characteristics 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 embodiments. It should be understood that the specific embodiments described here are only configured to explain the present invention, not to limit the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the statement "comprising..." does not exclude the presence of additional same elements in the process, method, article or device comprising said element.

Example 1

Please refer to Fig. 1, an embodiment of the present invention provides a method for detecting and calibrating color difference between nozzles, the method includes:

S1: print the print head color difference detection map, wherein the print head color difference detection map includes several gradient color blocks, and the ink volume value of each gradient color block is different;

In one embodiment, the step S1 specifically includes:

S11: According to the size of the nozzle, obtain the color difference detection map of the nozzle, wherein the size of the color difference detection map of the nozzle is greater than or equal to the sum of the sizes of all the nozzles, and the ink volume value is obtained from the color difference of the nozzle The gradient color block in the middle of the detection map increases or decreases toward both ends;

S12: Printing the print head color difference detection chart;

Specifically, first obtain the print head color difference detection map, the size of the print head color difference detection map is greater than or equal to the sum of the sizes of all the print heads, to ensure that each print head has ink, and the print head color difference detection map includes several gradient colors block, the ink volume value of each gradient color block is different, and the ink volume value increases or decreases from the gradient color block located in the middle of the nozzle color difference detection diagram to both ends, and the color difference detection diagram of the nozzle head Printing, observe whether the printed nozzle color difference detection map meets the first preset condition, and can efficiently and quickly detect whether there is a color difference between the nozzles. The first preset condition can be set by the user. The exemplary The first preset condition is that the color transition between each gradient color block is uniform and there is no fault phenomenon;

S2: When the printed nozzle color difference detection map does not meet the first preset condition, select a nozzle among all the nozzles as a reference nozzle according to a preset selection rule;

In one embodiment, the step S2 includes:

S21: Obtain the ink volume parameter of each nozzle;

S22: When the average value of the nozzle ink quantity parameter is greater than the preset ink quantity parameter, select the nozzle corresponding to the lightest gradient color block in the printed nozzle color difference detection diagram as the reference nozzle;

S23: When the average value of the nozzle ink quantity parameter is greater than the preset ink quantity parameter, select the nozzle corresponding to the darkest gradient color block in the printed nozzle color difference detection diagram as the reference nozzle;

Specifically, when the printed nozzle color difference detection map does not meet the first preset condition, it means that there is a color difference between the nozzles. At this time, the nozzle ink quantity parameter of each nozzle is obtained, and the nozzle ink quantity parameter represents the ink output ratio of the nozzle. , in the case of no modification, the ink quantity parameter of the nozzle is 100% by default. When the average value of the ink quantity parameter of the nozzle is greater than the preset ink quantity parameter, the color in the color difference detection chart of the nozzle printed out is selected to be the most The nozzle corresponding to the shallow gradient color block is used as the reference nozzle. When the average value of the ink volume parameter of the nozzle is greater than the preset ink volume parameter, the gradient color block with the darkest color in the printed nozzle color difference detection map is selected. The corresponding nozzle is used as the reference nozzle, and the preset ink volume parameters can be set by the user.

In one embodiment, the inkjet printer includes four nozzles. Referring to FIG. 2 , the obtained nozzle color difference detection map includes four gradient color blocks, each gradient color block corresponds to a nozzle, and each nozzle is guaranteed to output ink. The ink volume value of each gradient color block is different, and the ink volume value of the calibration color block located in the middle of the nozzle color difference detection diagram is the highest, and decreases to both ends in turn. In another embodiment, the calibration color block located in the middle of the color difference detection diagram of the print head has the lowest ink volume value, and increases toward both ends in turn.

Since the print head color difference detection map is composed of several gradient color blocks, when the print head has color difference, there will be obvious faults and uneven transitions between the gradient color blocks of the printed print head color difference detection map, even if the color is low. People with advanced degrees can also distinguish color difference, which reduces the difficulty of multi-nozzle color difference detection and improves the efficiency of detection.

S3: Obtain a print head color calibration map, wherein the print head color calibration map includes several calibration color blocks, and each of the calibration color blocks includes different ink volume adjustment parameters;

S31: When the average value of the ink volume parameter of the nozzle is greater than the preset ink volume parameter, obtain a color calibration chart of the nozzle in which the number of the first calibration color patches is greater than the number of the second calibration color patches;

S32: When the average value of the ink volume parameter of the nozzle is greater than the preset ink volume parameter, acquire a color calibration chart of the nozzle in which the number of the first calibration color patches is smaller than the number of the second calibration color patches.

Specifically, the nozzle color calibration map includes several calibration color blocks, and each calibration color block includes different ink volume adjustment parameters. When the average value of the nozzle ink volume parameters is greater than the preset ink volume parameter, the first A print head color calibration map with a number of calibration color patches greater than the number of the second calibration color block, that is, the ink volume of the print head is mainly adjusted negatively, and when the average value of the ink volume parameters of the print head is less than the preset ink volume parameter, the The print head color calibration chart in which the number of the first calibration color blocks is smaller than the number of the second calibration color blocks, that is, the ink volume of the print head is mainly adjusted positively;

In one embodiment, the calibration color patches include several first calibration color patches and at least one second calibration color patch, the ink quantity adjustment parameter of the first calibration color patch is a negative number, and the ink volume adjustment parameter of the second calibration color patch The ink volume adjustment parameter is a positive number. In this embodiment, the nozzle with the lightest printing color is selected as the reference nozzle, so when obtaining the color calibration diagram of the nozzle, the number of the first calibration color block is greater than that of the second calibration color block quantity.

S4: According to the ink quantity adjustment parameter, control all the nozzles to print the color calibration chart of the nozzles respectively;

In one embodiment, the step S4 includes:

Step S41: controlling the reference nozzle to print the nozzle color calibration chart;

Step S42: Record the nozzles other than the reference nozzles as the first nozzles, adjust the nozzle parameters of the first nozzles according to the ink volume adjustment parameters corresponding to the calibration color blocks and print the corresponding calibration color blocks until all the first nozzles are completed. Printing of color calibration charts.

Specifically, after it is determined that there is a color difference between the nozzles through the color difference detection diagram of the nozzles, it needs to be calibrated. First, the color calibration diagram of the nozzles is obtained, and the color calibration diagram of the nozzles includes several calibration color blocks, and each calibration color The block includes different ink volume adjustment parameters. When printing the nozzle color calibration chart through the reference nozzle, it is not necessary to adjust the nozzle parameters of the reference nozzle. Record the nozzles other than the reference nozzle as the first nozzle, and print the described nozzle through the first nozzle. When printing the color calibration chart of the nozzle, before printing a calibration color block, the nozzle needs to be adjusted according to the ink volume adjustment parameters of the calibration color block to be printed, and then the calibration color block is printed until all the first nozzles complete the nozzle color calibration chart of print.

S5: Determine the ink volume adjustment parameters of the nozzles other than the reference nozzle according to the printed nozzle color calibration chart;

In one embodiment, the step S5 includes:

S51: Record the calibration color patch printed by the reference nozzle as the reference color patch, the calibration color patch printed by the first nozzle as the third calibration color patch, and combine the reference color patch and all the third calibration patches The calibration color patch is compared, and the third calibration color patch with the same color value as the reference color patch is determined, which is recorded as the fourth calibration color patch;

S52: Determine the ink quantity adjustment parameter corresponding to the fourth calibration color block.

After all the nozzles have finished printing the nozzle color calibration chart, determine the ink volume adjustment parameters of each nozzle according to the printed nozzle color calibration diagram, record the calibration color block printed by the reference nozzle as the reference color block, and the first The calibration color patch printed by a nozzle is the third calibration color patch, the reference color patch is compared with all the third calibration color patches, and the third calibration color with the same color value as the reference color patch is determined block, denoted as the fourth calibration color block, the ink volume adjustment parameter corresponding to the fourth calibration color block is determined, and the ink volume adjustment parameter corresponding to the fourth calibration color block is the ink volume adjustment parameter corresponding to the first nozzle.

In one embodiment, the inkjet printer includes 4 nozzles, referring to Fig. 3, which is a color calibration chart of the nozzles printed by the inkjet printer, the part H1 in the figure is the reference color block printed by the reference nozzle, and the rest are By comparing the several third color patches printed by the first nozzle with the reference color patches, the ink volume adjustment parameters of the nozzle can be determined.

S6: Adjust the nozzle parameters of the nozzles other than the reference nozzle according to the ink volume adjustment parameter.

Specifically, after obtaining the ink quantity adjustment parameters of all the first nozzles, the parameters of the first nozzles can be adjusted. The parameters of the nozzles are the ink volume values of each color channel of the nozzles. The ink volume values of the color channels are C channel: 100%, M channel: 97%, Y channel: 98%, K channel: 100%. When the ink volume adjustment parameter is -1, each color channel of the adjusted print head The ink volume values are C channel: 99%, M channel: 96%, Y channel: 97%, K channel: 99%. It should be noted that the above values are only examples and not limitations. The adjustment ratio between the values can also be set by yourself.

In one embodiment, the method further includes after step S6:

S7: reprinting the color difference detection diagram of the nozzle;

S8: When the reprinted print head color calibration does not meet the first preset condition, repeat steps S2-S7 until the print head color difference detection chart that satisfies the first preset condition is printed.

Specifically, after one calibration is completed, the print head color difference detection chart can be printed again to determine whether the calibration is complete. If the reprinted print head color difference detection chart does not meet the first preset condition, the above calibration steps are repeated. until the print head color difference detection diagram meeting the first preset condition is printed out.

The method for detecting and calibrating the color difference between nozzles provided by the embodiment of the present invention, firstly, by obtaining and printing the color difference detection diagram of the nozzles, it is judged whether the printed nozzle color difference detection diagram satisfies the first preset condition, and the nozzles can be detected quickly and efficiently Whether there is a color difference between them; secondly, when the printed nozzle color difference detection diagram does not meet the first preset condition, select a nozzle among all the nozzles as a reference nozzle according to the preset selection rule, and obtain the nozzle color calibration diagram , the nozzle color calibration diagram includes several calibration color blocks, each of which includes different ink volume adjustment parameters; according to the ink volume adjustment parameters, print the nozzle color calibration diagram; according to the printed nozzle color The calibration chart determines the ink volume adjustment parameters of the nozzles other than the reference nozzle and adjusts the nozzle parameters of the nozzles other than the reference nozzle, which can quickly calibrate the printing color difference between the nozzles.

Example 2

Please refer to Fig. 4, an embodiment of the present invention provides a color difference detection and calibration device between nozzles, the device includes:

The nozzle color difference detection map printing module is used to print the nozzle color difference detection map, wherein the nozzle color difference detection map includes several gradient color blocks, and the ink volume value of each gradient color block is different;

A reference nozzle selection module, configured to select a nozzle among all the nozzles as a reference nozzle according to a preset selection rule when the printed nozzle color difference detection map does not meet the first preset condition;

The nozzle color calibration diagram acquisition module is used to obtain the nozzle color calibration diagram, wherein the nozzle color calibration diagram includes several calibration color blocks, and each of the calibration color blocks includes different ink volume adjustment parameters;

The nozzle color calibration chart printing module is used to control all the nozzles to print the nozzle color calibration chart according to the ink volume adjustment parameters;

The ink volume adjustment parameter determination module is used to determine the ink volume adjustment parameters of the nozzles other than the reference nozzle according to the printed nozzle color calibration chart;

The printhead parameter adjustment module is used to adjust the printhead parameters of the printheads other than the reference printhead according to the ink quantity adjustment parameter.

In one embodiment, the print head color difference detection chart printing module includes:

The detection map acquisition unit is configured to obtain the print head color difference detection map according to the size of the print head, wherein the size of the print head color difference detection map is greater than or equal to the sum of the sizes of all the print heads, and the ink volume value is from The gradient color block in the middle of the nozzle color difference detection diagram increases or decreases toward both ends;

The detection chart printing unit is used to print the color difference detection chart of the nozzles;

In one embodiment, the reference nozzle selection module includes:

A parameter acquisition unit, configured to acquire the ink volume parameter of each nozzle;

The first selection unit is used to select the nozzle corresponding to the lightest gradient color block in the printed nozzle color difference detection diagram as a reference when the average value of the ink quantity parameter of the nozzle is greater than the preset ink quantity parameter Nozzle;

The second selection unit is used to select the nozzle corresponding to the darkest gradient color block in the printed nozzle color difference detection diagram as the reference nozzle when the average value of the ink quantity parameter of the nozzle is greater than the preset ink quantity parameter .

In one embodiment, the calibration color patch includes a first calibration color patch and a second calibration color patch, the ink quantity adjustment parameter of the first calibration color patch is a negative number, and the ink quantity adjustment parameter of the second calibration color patch The parameter is a positive number, and the module for obtaining the print head color calibration map includes:

A first calibration chart acquisition unit, configured to acquire a print head color calibration chart in which the number of the first calibration color patches is greater than the number of the second calibration color patches when the average value of the ink quantity parameters of the nozzle is greater than the preset ink quantity parameters;

The second calibration chart acquisition unit is used to acquire a print head color calibration chart in which the number of the first calibration color patches is smaller than the number of the second calibration color patches when the average value of the ink quantity parameters of the spray head is greater than the preset ink quantity parameter.

In one embodiment, the ink volume adjustment parameter determination module includes:

The first determining unit is used to record the calibration color patch printed by the reference nozzle as the reference color patch, and the calibration color patch printed by the first nozzle as the third calibration color patch, and combine the reference color patch and All the third calibration color patches are compared to determine the third calibration color patch with the same color value as the reference color patch, which is recorded as the fourth calibration color patch;

The second determination unit is configured to determine the ink quantity adjustment parameter corresponding to the fourth calibration color block.

The color difference detection and calibration device between nozzles in the embodiment of the present invention, by obtaining and printing the color difference detection diagram of nozzles, judges whether the printed color difference detection diagram of nozzles satisfies the first preset condition, and can quickly and efficiently detect whether there is a color difference between nozzles. color difference; secondly, when the printed nozzle color difference detection diagram does not meet the first preset condition, select a nozzle among all the nozzles as a reference nozzle according to the preset selection rule, and obtain the nozzle color calibration diagram, the The nozzle color calibration diagram includes several calibration color blocks, each of which includes different ink volume adjustment parameters; according to the ink volume adjustment parameters, print the nozzle color calibration diagram; according to the printed nozzle color calibration diagram, Determining the ink volume adjustment parameters of the nozzles other than the reference nozzle and adjusting the parameters of the nozzles other than the reference nozzle can quickly calibrate the printing color difference between the nozzles.

Example 3

In addition, the color difference detection and calibration method between print heads described in the embodiment of the present invention in conjunction with FIG. 1 can be implemented by a color difference detection and calibration device between print heads. Fig. 5 shows a schematic diagram of the hardware structure of the device for detecting and calibrating the color difference between print heads provided by the embodiment of the present invention.

The device for detecting and calibrating color difference between print heads may include a processor and a memory storing computer program instructions.

Specifically, the above-mentioned processor may include a central processing unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits in the embodiments of the present invention.

Memory may include mass storage for data or instructions. By way of example and not limitation, the memory 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 two or more a combination of the above. Storage may include removable or non-removable (or fixed) media, where appropriate. The memory may be internal or external to the data processing device, where appropriate. In a particular embodiment, the memory is non-volatile solid-state memory. In particular embodiments, 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 the above.

The processor reads and executes the computer program instructions stored in the memory to implement any method for detecting and calibrating the color difference between printheads in the above embodiments.

In one example, the device for detecting and calibrating color difference between print heads may further include a communication interface and a bus. Among them, as shown in the color difference detection and calibration between nozzles in the figure, the processor, memory, and communication interface are connected through a bus to complete mutual communication.

The communication interface is mainly used to realize the communication between various modules, devices, units and/or devices in the embodiments of the present invention.

The bus includes hardware, software or both, and couples the components of the color difference detection and calibration equipment between print heads to each other. By way of example and not limitation, the bus may include Accelerated Graphics Port (AGP) or other graphics bus, Enhanced Industry Standard Architecture (EISA) bus, Front Side Bus (FSB), HyperTransport (HT) interconnect, Industry Standard Architecture (ISA) Bus, Infiniband Interconnect, Low Pin Count (LPC) Bus, Memory Bus, Micro Channel Architecture (MCA) Bus, Peripheral Component Interconnect (PCI) Bus, PCI-Express (PCI-X) Bus, Serial Advanced Technology Attachment (SATA) bus, Video Electronics Standards Association Local (VLB) bus or other suitable bus or a combination of two or more of these. A bus may comprise one or more buses, where appropriate. Although embodiments of the invention describe and illustrate a particular bus, the invention contemplates any suitable bus or interconnect.

Example 4

In addition, in combination with the method for detecting and calibrating the color difference between nozzles in the above embodiments, the embodiment of the present invention may provide a computer-readable storage medium for implementation. Computer program instructions are stored on the computer-readable storage medium; when the computer program instructions are executed by a processor, any method for detecting and calibrating the color difference between nozzles in the above-mentioned embodiments is implemented.

To sum up, the color difference detection and calibration method, device, equipment and storage medium between nozzles provided by the embodiments of the present invention, firstly, by obtaining and printing the color difference detection diagram of the nozzles, it is judged whether the printed nozzle color difference detection diagram satisfies The first preset condition can quickly and efficiently detect whether there is a color difference between the nozzles; secondly, when the printed nozzle color difference detection map does not meet the first preset condition, according to the preset selection rule among all the nozzles Select a print head as the reference print head, obtain the print head color calibration map, the print head color calibration map includes a number of calibration color blocks, each of the calibration color blocks includes different ink volume adjustment parameters; according to the ink volume adjustment parameters, print all The print head color calibration chart; according to the printed print head color calibration chart, determine the ink volume adjustment parameters of the print heads other than the reference print head and adjust the print head parameters of the print head other than the reference print head, which can quickly calibrate the printing color difference between the print heads.

It is to be understood that the invention is not limited to the specific arrangements and processes described above and shown in the drawings. For conciseness, detailed descriptions of known methods are 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 sequence of steps after understanding the spirit of the present invention.

The functional blocks shown in the structural block diagrams described above 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, a plug-in, a function card, or the like. When implemented in software, the elements of the invention are the programs or code segments employed to perform the required tasks. Programs or code segments can be stored in machine-readable media, or transmitted over transmission media or communication links by data signals carried in carrier waves. "Machine-readable medium" may include any medium that can store or transmit 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, fiber optic media, radio frequency (RF) links, and the like. Code segments may be downloaded via a computer network such as the Internet, an Intranet, or the like.

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 may be performed in the order mentioned in the embodiment, or may be different from the order in the embodiment, or several steps may be performed simultaneously.

The above is only a specific implementation of the present invention, and those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described systems, modules and units can refer to the foregoing method embodiments The corresponding process in , will not be repeated here. It should be understood that the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present invention, and these modifications or replacements should cover all Within the protection scope of the present invention.

Claims (10)

1. The method for detecting and calibrating the chromatic aberration between the spray heads is characterized by comprising the following steps:

s1: printing a spray head color difference detection graph, wherein the spray head color difference detection graph comprises a plurality of gradient color blocks, and the ink value of each gradient color block is different;

s2: when the printed spray head color difference detection diagram does not meet a first preset condition, selecting a spray head from all spray heads as a reference spray head according to a preset selection rule;

s3: acquiring a spray head color calibration chart, wherein the spray head color calibration chart comprises a plurality of calibration color blocks, and each calibration color block comprises different ink quantity adjusting parameters;

s4: controlling all spray heads to print the spray head color calibration chart respectively according to the ink quantity adjusting parameters;

s5: determining ink quantity adjusting parameters of the nozzles except the reference nozzle according to the printed nozzle color calibration chart;

s6: and adjusting the nozzle parameters of the nozzles except the reference nozzle according to the ink quantity adjusting parameters.

2. The method for detecting and calibrating color difference between nozzles according to claim 1, wherein the printing nozzle color difference detection map comprises:

acquiring a spray head color difference detection diagram according to the size of a spray head, wherein the size of the spray head color difference detection diagram is larger than or equal to the sum of the sizes of all spray heads, and the ink value is gradually increased or decreased from a gradient color block positioned in the middle of the spray head color difference detection diagram to two ends;

and printing the color difference detection graph of the spray head.

3. The method for detecting and calibrating color difference between nozzles according to claim 2, wherein when the printed color difference detection chart of the nozzles does not satisfy a first preset condition, selecting a nozzle among all the nozzles according to a preset selection rule as a reference nozzle comprises:

acquiring a nozzle ink quantity parameter of each nozzle;

when the average value of the ink quantity parameters of the spray heads is larger than the preset ink quantity parameters, the spray heads corresponding to the lightest gradient color blocks in the printed spray head color difference detection diagram are selected as reference spray heads;

when the average value of the ink quantity parameters of the spray heads is larger than the preset ink quantity parameters, the spray heads corresponding to the darkest gradient color blocks in the printed spray head color difference detection diagram are selected as reference spray heads.

4. The method for detecting and calibrating color difference between nozzles according to claim 1, wherein the calibration color patches include a first calibration color patch and a second calibration color patch, the ink amount adjustment parameter of the first calibration color patch is a negative number, the ink amount adjustment parameter of the second calibration color patch is a positive number, and the acquiring the nozzle color calibration map includes:

when the average value of the nozzle ink quantity parameters is larger than the preset ink quantity parameters, acquiring a nozzle color calibration chart with the number of the first calibration color blocks being larger than that of the second calibration color blocks;

when the average value of the nozzle ink quantity parameters is larger than the preset ink quantity parameters, acquiring a nozzle color calibration chart with the number of the first calibration color patches smaller than that of the second calibration color patches.

5. The method for detecting and calibrating color difference between nozzles according to claim 4, wherein the step S4: controlling all the nozzles to print the nozzle color calibration patterns respectively according to the ink quantity adjusting parameters comprises the following steps:

controlling the reference spray head to print the spray head color calibration chart;

and recording the nozzles except the reference nozzle as a first nozzle, adjusting the nozzle ink quantity parameters of the first nozzle according to the ink quantity adjusting parameters corresponding to the calibration color blocks, and printing the corresponding calibration color blocks until all the first nozzles finish printing the nozzle color calibration chart.

6. The method for detecting and calibrating color difference between nozzles according to claim 5, wherein the step S5: according to the printed spray head color calibration chart, determining the ink quantity adjusting parameters of the spray heads except the reference spray head comprises the following steps:

recording the calibration color block printed by the reference spray head as a reference color block, wherein the calibration color block printed by the first spray head is a third calibration color block, comparing the reference color block with all the third calibration color blocks, determining a third calibration color block with the same color value as the reference color block, and recording the third calibration color block as a fourth calibration color block;

and determining the ink quantity adjusting parameter corresponding to the fourth calibration color lump.

7. The method for detecting and calibrating color difference between spray heads according to claim 1, further comprising, after step S6:

s7: reprinting the spray head color difference detection graph;

s8: and when the reprinted nozzle color calibration does not meet the first preset condition, the steps S2-S7 are circulated until the nozzle color difference detection chart meeting the first preset condition is printed.

8. An inter-showerhead color difference detection and calibration apparatus, comprising:

the spray head color difference detection diagram printing module is used for printing the spray head color difference detection diagram, wherein the spray head color difference detection diagram comprises a plurality of gradual change color blocks, and the ink value of each gradual change color block is different;

the reference spray head selection module is used for selecting a spray head from all spray heads as a reference spray head according to a preset selection rule when the printed spray head color difference detection diagram does not meet a first preset condition;

the spray head color calibration chart acquisition module is used for acquiring a spray head color calibration chart, wherein the spray head color calibration chart comprises a plurality of calibration color blocks, and each calibration color block comprises different ink quantity adjusting parameters;

the spray head color calibration chart printing module is used for controlling all spray heads to print the spray head color calibration charts respectively according to the ink quantity adjusting parameters;

the ink quantity adjusting parameter determining module is used for determining ink quantity adjusting parameters of the nozzles except the reference nozzle according to the printed nozzle color calibration chart;

and the nozzle parameter adjusting module is used for adjusting the nozzle parameters of the nozzles except the reference nozzle according to the ink quantity adjusting parameters.

9. An inter-showerhead color difference detection and calibration 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 1-7.

10. A storage medium having stored thereon computer program instructions, which when executed by a processor, implement the method of any of claims 1-7.

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