Method, apparatus, and equipment for printing test images based on adjusting ink concentration using a light source.

Abstract

The present application belongs to the field of inkjet printing technology, and provides a method, device and equipment for printing test images based on light source adjustment of ink concentration, which solves the problem of inaccurate detection results of abnormal nozzles caused by unclear printed test images due to the insensitivity of cameras to certain colors during detection of the existing technology. The method comprises: determining the light source parameters of the camera; obtaining a first color block image using color blocks of different colors and different concentrations of ink; controlling the light source parameters of the camera to collect the first color block image to obtain a second color block image; obtaining an ink concentration that meets a preset condition from the second color block image, which is recorded as the optimal ink concentration; generating printing data according to the optimal ink concentration; printing a test image according to the printing data; and controlling the light source parameters of the camera to collect the test image and perform nozzle state detection. According to the method, different colors and different concentrations of ink are photographed by adjusting the light source parameters, so that the printed test image is clear, thereby improving the accuracy of the detection of abnormal nozzles.

Description

Technical Field

[0001] This invention relates to the field of inkjet printing, and more particularly to a method, apparatus, and device for printing test images based on adjusting ink concentration using a light source. Background Technology

[0002] Inkjet printing refers to the process of ejecting ink droplets from nozzles on a printhead onto a printing medium to obtain images or text. However, after prolonged operation, ink head nozzles are prone to abnormalities due to ink path contamination, ink sedimentation, dust, moisture, etc., such as clogging, oblique spraying, blurring, and insufficient ink volume. If these issues are not detected in time and the printhead continues to be used, problems such as streaks and blank areas in the printed image will occur, seriously affecting product quality. Current technology involves printing a test image before or during printing, then photographing the test image with a camera and analyzing the image to determine if there are any abnormal nozzles in the inkjet printhead and their location. However, in actual use, it is common to misidentify or fail to detect abnormal nozzles. Analysis may reveal that the printed test image contains multiple colors or color values, while the camera is only sensitive to certain colors or color values. This results in clearer images of colors or color values ​​that the camera is sensitive to, leading to accurate nozzle abnormality analysis, while blurry images of colors or color values ​​that the camera is not sensitive to result in inaccurate nozzle abnormality analysis. Therefore, developing a technology that can capture clear images of different colors and color values ​​is an urgent problem to be solved; and the present invention is based on adjusting the ink concentration with a light source to print test images, thereby making the test images clear and enabling accurate inspection of abnormal nozzles. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a method, apparatus, and device for printing test images based on adjusting ink concentration using a light source, in order to solve the problem in the prior art where unclear printed test images due to the camera's insensitivity to certain colors lead to inaccurate abnormal nozzle detection results.

[0004] In a first aspect, embodiments of the present invention provide a method for adjusting an ink concentration detection nozzle based on illumination light, the method comprising:

[0005] S1: Determine the camera's light source parameters;

[0006] S2: Use different colored inks to print multiple color blocks of different concentrations to obtain the image of the first color block;

[0007] S3: Control the camera to acquire the first color block image under the light source parameters to obtain the second color block image;

[0008] S4: Obtain the ink concentration that meets the preset conditions for each different color according to the second color block image, and record it as the optimal ink concentration;

[0009] S5: Obtain printing data based on the optimal ink concentration corresponding to each different color ink;

[0010] S6: Control the nozzle to output ink and print a test image according to the printing data;

[0011] S7: Control the camera to acquire the test image under the light source parameters and perform nozzle status detection based on the acquired image.

[0012] Preferably, the light source parameters of the camera include the camera's power parameters and color parameters.

[0013] Preferably, the step of obtaining the ink concentration that meets the preset conditions for each different color based on the second color patch image, and denoted as the optimal ink concentration, includes:

[0014] Obtain color patches of different concentrations corresponding to each color ink and determine the color patch with the highest clarity, which is recorded as the best color patch;

[0015] Obtain the ink concentration corresponding to the optimal color block, and denot it as the optimal ink concentration.

[0016] Preferably, the method further includes:

[0017] The camera is controlled to acquire the first color patch image under different light source parameters to obtain the second color patch image;

[0018] The mapping relationship between the optimal ink concentration of each different color ink and the light source parameters is obtained based on the second color block image, and is denoted as the concentration-light source mapping relationship.

[0019] Preferably, the method further includes:

[0020] The camera is controlled to acquire the first color patch image under different light source parameters to obtain the second color patch image;

[0021] Based on the second color block image, obtain the one-to-one correspondence between the optimal ink concentration of each different color ink and the light source parameters;

[0022] The formula for the relationship between concentration and light source is obtained by curve fitting based on the one-to-one correspondence.

[0023] Preferably, obtaining printing data based on the optimal ink concentration corresponding to each different color ink includes:

[0024] Obtain the first test image to be printed;

[0025] RIP processing is performed on the first test image to be printed to obtain its corresponding ink dot data;

[0026] The print data is obtained by adjusting the ink dot data according to the optimal ink concentration.

[0027] Preferably, generating printing data based on the optimal ink concentration corresponding to each different color ink includes:

[0028] A second image to be tested is generated based on the optimal ink concentration and preset test rules;

[0029] The second image to be tested is processed using RIP to obtain the printed data.

[0030] Secondly, embodiments of the present invention provide a device for adjusting ink concentration detection nozzles based on illumination light, the device comprising:

[0031] The light source parameter acquisition module is used to acquire the light source parameters of the camera;

[0032] The color block printing module is used to obtain the first color block image by printing multiple color blocks of different concentrations using different colored inks.

[0033] The image acquisition module is used to acquire the first color block image and obtain the second color block image by controlling the camera to acquire the first color block image under the light source parameters;

[0034] The ink concentration acquisition module is used to acquire the ink concentration that meets the preset conditions for each different color according to the second color block image, and record it as the optimal ink concentration.

[0035] The print data acquisition module is used to acquire print data based on the optimal ink concentration corresponding to each different color ink.

[0036] The test image acquisition module controls the nozzle to dispense ink based on the printing data to obtain the test image;

[0037] The nozzle status inspection module is used to control the camera to acquire the test image under the light source parameters and to detect the nozzle status based on the acquired image.

[0038] Thirdly, embodiments of the present invention provide a device for printing test images based on adjusting ink density using a light source, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, wherein when the computer program instructions are executed by the processor, the method of the first aspect described above is implemented.

[0039] Fourthly, embodiments of the present invention provide a storage medium storing computer program instructions, which, when executed by a processor, implement the method of the first aspect described above.

[0040] In summary, the beneficial effects of the present invention are as follows:

[0041] The present invention provides a method, apparatus, and device for printing test images based on adjusting ink concentration using a light source, which solves the problem that unclear test images are caused by the camera's insensitivity to certain colors, resulting in inaccurate abnormal nozzle detection results.

[0042] This invention determines the light source parameters of a camera; prints multiple color blocks of different concentrations using different colored inks to obtain a first color block image; controls the camera to acquire the first color block image under the light source parameters to obtain a second color block image; obtains the ink concentration that meets preset conditions for each different color based on the second color block image, and records it as the optimal ink concentration; obtains printing data based on the optimal ink concentration for each different colored ink; controls the nozzle to output ink and print a test image based on the printing data; controls the camera to acquire the test image under the light source parameters and performs nozzle status detection based on the acquired image to ensure that the test image acquired by the camera is clear enough, thereby ensuring the accuracy of abnormal nozzle detection. Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of the present invention.

[0044] Figure 1 This is a flowchart illustrating a method for printing test images based on adjusting ink concentration using a light source, as provided in Example 1.

[0045] Figure 2 A schematic diagram illustrating the method for printing test images based on adjusting ink concentration using a light source in Example 1;

[0046] Figure 3 A schematic diagram illustrating the method for printing test images based on adjusting ink concentration using a light source in Example 1;

[0047] Figure 4 This is a schematic diagram of the device for printing test images based on adjusting ink concentration using a light source, according to an embodiment of the present invention.

[0048] Figure 5 This is a schematic diagram of the device for printing test images based on adjusting ink concentration using a light source, according to an embodiment of the present invention. Detailed Implementation

[0049] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the invention.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0051] Please see Figure 1 This invention provides a method for printing test images by adjusting ink concentration based on a light source. The steps of this method are as follows:

[0052] S1: Determine the camera's light source parameters;

[0053] S2: Use different colored inks to print multiple color blocks of different concentrations to obtain the image of the first color block;

[0054] S3: Control the camera to acquire the first color block image under the light source parameters to obtain the second color block image;

[0055] S4: Obtain the ink concentration that meets the preset conditions for each different color according to the second color block image, and record it as the optimal ink concentration;

[0056] S5: Obtain printing data based on the optimal ink concentration corresponding to each different color ink;

[0057] S6: Control the nozzle to output ink and print a test image according to the printing data;

[0058] S7: Control the camera to acquire the test image under the light source parameters and perform nozzle status detection based on the acquired image.

[0059] Specifically, the camera's light source parameters include power parameters and color parameters. The power parameter controls the brightness of the camera's light source and can be used to set the brightness. The color parameter adjusts the color of the camera's light source; the camera's light source can emit various colors of light, such as white, red, blue, and green. Before testing, the power and color parameters of the camera's light source can be set according to the actual situation.

[0060] refer to Figure 2 Before the formal testing, color blocks of different concentrations of different colored inks are printed. By printing test images of color blocks of different concentrations of different colored inks, a printed test image is obtained, which is recorded as the first color block image.

[0061] refer to Figure 3 After obtaining the test image by printing test blocks of different color inks with different concentrations, the second color block image is obtained by taking a picture of the test image according to the determined light source parameters of the camera.

[0062] After obtaining the second color block image, extract the color blocks of different concentrations corresponding to each color ink from the second color block image and determine the color block with the highest clarity, which is recorded as the best color block; obtain the ink concentration corresponding to the best color block, which is recorded as the best ink concentration.

[0063] In one embodiment, test images of different concentrations of ink using a camera with predetermined light source parameters are obtained by capturing images of different color inks at different concentrations. The image concentration of each color in the printed test image is then obtained. Based on a concentration mapping table stored in the system, the system identifies the optimal ink concentration value for the light source parameter in the concentration mapping table. After obtaining the optimal ink concentration value, the system automatically adjusts the ink concentration values ​​in the printed test image. Obtaining the ink concentration of the printed test image through the system is more accurate and requires no manual labor. For example, in this test, the test image printed with ink C at a concentration of 10% is clearer, and the test image printed with ink D at a concentration of 60% is also clearer. Therefore, the system will automatically adjust the concentration of the existing ink in the printed test image by increasing or decreasing the ink concentration. For example, the concentration of ink C is adjusted to 10%, and the concentration of ink D in the printed test image is adjusted to 60%.

[0064] In another embodiment, test images of different concentrations of ink blocks of different colors are captured by a camera with predetermined light source parameters to obtain the image concentration of each color in the printed test image. Based on the concentration-light source relationship formula stored in the system, the system automatically calculates the optimal ink concentration value for the color in the camera with the specified light source parameters. After obtaining the optimal color ink concentration value, the system automatically adjusts the color ink concentration value in the printed test image. For example, in this test, the test image printed with ink C at a concentration of 10% is clearer, and the test image printed with ink D at a concentration of 50% is clearer. Therefore, the system will automatically adjust the concentration of ink C to 10% and the concentration of ink D to 50% by increasing or decreasing the concentration of ink in the existing ink in the printed test image.

[0065] In one embodiment, the method further includes:

[0066] The camera is controlled to acquire the first color patch image under different light source parameters to obtain the second color patch image;

[0067] The mapping relationship between the optimal ink concentration of each different color ink and the light source parameters is obtained based on the second color block image, and is denoted as the concentration-light source mapping relationship.

[0068] Specifically, by taking test images of different concentration patches of different colored inks under different light source parameters using a statistical camera, different second color patch images are obtained. Based on the second color patch images, a mapping relationship is established between different camera parameters and the optimal ink concentration for different ink colors, and a concentration mapping table between different camera light source parameters and different concentration patches of different colored inks is established.

[0069] In another embodiment, the method further includes:

[0070] The camera is controlled to acquire the first color patch image under different light source parameters to obtain the second color patch image;

[0071] Based on the second color block image, obtain the one-to-one correspondence between the optimal ink concentration of each different color ink and the light source parameters;

[0072] The formula for the relationship between concentration and light source is obtained by curve fitting based on the one-to-one correspondence.

[0073] For details, please refer to Figure 4 By taking test images of different color blocks of different inks with different concentrations under different light source parameters, different second color block images are obtained. From the second color block images, the one-to-one correspondence between the optimal ink concentration of different colors and the different light source parameters of the camera is obtained. The concentration-light source relationship formula is obtained by curve fitting through the obtained one-to-one correspondence.

[0074] By capturing test images of different concentration patches of different colored inks under various light source parameters using a statistical camera, a concentration mapping table between the light source parameters of different cameras and the concentration patches of different colored inks can be established. Alternatively, by capturing test images of different concentration patches of different colored inks under various light source parameters using a statistical camera, a one-to-one correspondence can be obtained, and a concentration-light source relationship formula can be obtained through curve fitting. Based on the stored concentration mapping table and concentration-light source relationship formula, subsequent detection can eliminate the need to test different concentration patches of different colored inks with different light source parameters. The optimal concentration value of different colored inks can be directly determined based on the determined light source parameters, and the current ink concentration value can be directly adjusted based on the optimal ink concentration value, making the detection process faster and more accurate.

[0075] In one embodiment, obtaining printing data based on the optimal ink concentration corresponding to each different color ink includes:

[0076] Obtain the first test image to be printed;

[0077] RIP processing is performed on the first test image to be printed to obtain its corresponding ink dot data;

[0078] The print data is obtained by adjusting the ink dot data according to the optimal ink concentration.

[0079] Specifically, the first test image to be printed is obtained, and the obtained first test image to be printed is processed by RIP. After processing, the corresponding ink dot data is obtained. The ink dot data is adjusted according to the obtained optimal ink concentration so that the overall concentration of the ink dot data is equal to the optimal ink concentration. The printing data is obtained based on the adjusted ink dot data.

[0080] In another embodiment, generating print data based on the optimal ink concentration corresponding to each different color ink includes:

[0081] A second image to be tested is generated based on the optimal ink concentration and preset test rules;

[0082] The second image to be tested is processed using RIP to obtain the printed data.

[0083] Specifically, the preset test rules can be determined according to the actual situation. For example, the preset test rules can be to control each nozzle to print a line segment, or to first control the odd-numbered nozzles to print line segments, and then control the even-numbered nozzles to print line segments. The resulting test image of abnormal nozzles consists of multiple line segments arranged along the sub-scanning direction. During ink printing, the ink concentration is controlled at the optimal ink concentration, and the final printed image is recorded as the second test image. The obtained test image is then processed using RIP to obtain the print data.

[0084] The nozzles in the printhead are controlled to print according to the printing data to obtain a test image for abnormal nozzle detection. After obtaining the test image, the camera is controlled to acquire the test image under the corresponding light source parameters and the nozzle status is detected based on the acquired image, including whether there is nozzle abnormality in the printhead and the detection of the location and number of abnormal nozzles.

[0085] In summary, the method for printing test images based on adjusting ink concentration using a light source, as described in this invention, involves: determining the light source parameters of a camera; printing multiple color blocks of different concentrations using different colored inks to obtain a first color block image; controlling the camera to acquire the first color block image under the specified light source parameters to obtain a second color block image; obtaining the ink concentration corresponding to each different color that meets preset conditions based on the second color block image, and recording it as the optimal ink concentration; obtaining printing data based on the optimal ink concentration corresponding to each different colored ink; controlling the nozzle to output ink and print a test image based on the printing data; and controlling the camera to acquire the test image under the specified light source parameters and performing nozzle status detection based on the acquired image to ensure that the test image acquired by the camera is sufficiently clear, thereby ensuring the accuracy of abnormal nozzle detection.

[0086] Example 2

[0087] Please see Figure 4 This invention provides an apparatus for printing test images based on adjusting ink concentration using a light source. The apparatus includes:

[0088] Module 1 for obtaining light source parameters is used to determine the light source parameters of the camera;

[0089] Color block printing module 2 is used to obtain the first color block image by printing multiple color blocks of different concentrations using different colored inks;

[0090] Image acquisition module 3 is used to acquire the first color block image and obtain the second color block image by controlling the camera to acquire the first color block image under the light source parameters;

[0091] The ink concentration acquisition module 4 is used to acquire the ink concentration that meets the preset conditions for each different color according to the second color block image, and record it as the optimal ink concentration.

[0092] The print data acquisition module 5 is used to acquire print data according to the optimal ink concentration corresponding to each different color ink.

[0093] The test image acquisition module 6 controls the nozzle to dispense ink according to the printing data to obtain the test image;

[0094] Nozzle status inspection module 7 is used to control the camera to acquire the test image under the light source parameters and to detect the nozzle status based on the acquired image.

[0095] Preferably, the image acquisition module 3 includes:

[0096] Image acquisition unit: used to control the camera to acquire the first color block image under different light source parameters to obtain the second color block image;

[0097] The mapping relationship acquisition unit is used to acquire the mapping relationship between the optimal ink concentration of each different color ink and the light source parameters based on the second color block image, which is denoted as the concentration light source mapping relationship.

[0098] Preferably, the image acquisition module 3 includes:

[0099] Image acquisition unit: used to control the camera to acquire the first color block image under different light source parameters to obtain the second color block image;

[0100] The correspondence acquisition unit: acquires a one-to-one correspondence between the optimal ink concentration of each different color ink and the light source parameters based on the second color block image;

[0101] Unit for obtaining concentration light source relationship formula: used to obtain the concentration light source relationship formula by curve fitting based on the one-to-one correspondence.

[0102] Preferably, the ink concentration acquisition module 4 includes:

[0103] Color patch acquisition unit: used to acquire color patches of different concentrations corresponding to each color ink and determine the color patch with the highest clarity, which is recorded as the best color patch;

[0104] Ink concentration acquisition unit: used to acquire the ink concentration corresponding to the optimal color block, denoted as the optimal ink concentration.

[0105] Preferably, the print data acquisition module 5 includes:

[0106] Test image acquisition unit: used to acquire the first test image to be printed;

[0107] Ink dot data acquisition unit: used to perform RIP processing on the first test image to be printed to obtain its corresponding ink dot data;

[0108] Data acquisition unit: used to acquire the printing data by adjusting the ink dot data according to the optimal ink concentration.

[0109] Preferably, the module for acquiring print data includes:

[0110] The test image acquisition unit generates a second test image based on the optimal ink concentration and preset test rules.

[0111] Print data acquisition unit: used to perform RIP processing on the second image to be tested to obtain the print data.

[0112] This invention discloses an apparatus for printing test images based on adjusting ink concentration using a light source. The apparatus involves: determining the light source parameters of a camera; printing multiple color blocks of different concentrations using different colored inks to obtain a first color block image; controlling the camera to acquire the first color block image under the specified light source parameters to obtain a second color block image; obtaining the optimal ink concentration for each color based on the second color block image, according to preset conditions; acquiring printing data based on the optimal ink concentration for each color; controlling the nozzles to output ink and print a test image based on the printing data; and controlling the camera to acquire the test image under the specified light source parameters and performing nozzle status detection based on the acquired image to ensure that the test image acquired by the camera is sufficiently clear, thereby guaranteeing the accuracy of abnormal nozzle detection.

[0113] Example 3

[0114] In addition, combined Figure 1 The method for printing test images based on adjusting ink concentration using a light source, as described in this embodiment of the invention, can be implemented by a nozzle detection device for adjusting ink concentration using a light source. Figure 4 This diagram illustrates the hardware structure of a method and device for printing test images based on adjusting ink concentration using a light source, as provided in an embodiment of the present invention.

[0115] A device that prints test images by adjusting ink density based on a light source may include a processor and a memory storing computer program instructions.

[0116] Specifically, the processor may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement embodiments of the present invention.

[0117] The memory may include a large-capacity storage device for data or instructions. For example, and not limitingly, the memory may include a hard disk drive (HDD), a floppy disk drive, flash memory, an optical disk drive, a magneto-optical disk drive, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory may include removable or non-removable (or fixed) media. Where appropriate, the memory may be internal or external to a data processing device. In a particular embodiment, the memory is a non-volatile solid-state memory. In a particular embodiment, the memory includes a read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0118] The processor reads and executes computer program instructions stored in the memory to implement any of the ink concentration detection nozzle adjustment methods based on illumination light in the above embodiments.

[0119] In one example, a device for printing test images based on adjusting ink density using a light source may also include a communication interface and a bus. For example, Figure 4 As shown, the processor, memory, and communication interface are connected via a bus and communicate with each other.

[0120] The communication interface is mainly used to enable communication between various modules, devices, units and / or equipment in the embodiments of the present invention.

[0121] A bus, including hardware, software, or both, couples together components of a device that prints test images by adjusting ink density based on a light source. For example, and not limitingly, 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), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel 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 buses, or combinations of two or more of these. Where appropriate, a bus may include one or more buses. While specific buses are described and illustrated in embodiments of the invention, the invention contemplates any suitable bus or interconnect.

[0122] Furthermore, in conjunction with the method for printing test images based on adjusting ink density using a light source in the above embodiments, this invention can be implemented using a computer-readable storage medium. This computer-readable storage medium stores computer program instructions; when executed by a processor, these computer program instructions implement any of the methods for printing test images based on adjusting ink density using a light source in the above embodiments.

[0123] In summary, the method, apparatus, and device for printing test images based on adjusting ink concentration using a light source provided in this embodiment of the invention determine the light source parameters of a camera; print multiple color blocks of different concentrations using different colored inks to obtain a first color block image; control the camera to acquire the first color block image under the light source parameters to obtain a second color block image; obtain the ink concentration corresponding to each different color that meets preset conditions based on the second color block image, and record it as the optimal ink concentration; obtain printing data based on the optimal ink concentration corresponding to each different colored ink; control the nozzle to output ink and print a test image based on the printing data; control the camera to acquire the test image under the light source parameters and perform nozzle status detection based on the acquired image to ensure that the test image acquired by the camera is sufficiently clear, thereby ensuring the accuracy of abnormal nozzle detection.

[0124] It should be clarified that the present invention is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, 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. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of the present invention.

[0125] The functional blocks shown in the above-described structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this invention are programs or code segments used to perform the required tasks. The programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0126] It should also be noted that the exemplary embodiments mentioned in this invention describe methods or systems based on a series of steps or apparatus. However, this invention is not limited to the order of the steps described above; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0127] The above description is merely a specific embodiment of the present invention. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and 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 conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A method of printing test images based on ink density adjustment of a light source, characterized by, The method comprises: determining the light source parameters of the camera; printing a plurality of color blocks of different concentrations using different color inks to obtain first color block images; controlling the camera to capture the first color block images under the light source parameters to obtain second color block images; obtaining the ink concentration corresponding to each different color that meets the preset condition from the second color block images, denoted as the optimal ink concentration; obtaining the printing data according to the optimal ink concentration corresponding to each different color ink; controlling the nozzle to print according to the printing data to obtain a test image; controlling the camera to capture the test image under the light source parameters and performing nozzle state detection according to the captured image.

2. The method for printing test images based on adjusting ink concentration using a light source according to claim 1, characterized in that, The light source parameters of the camera include the power parameters and color parameters of the camera.

3. The method of adjusting ink density printing test images based on light source according to claim 2, wherein, The optimal ink concentration corresponding to each different color that meets the preset condition is obtained from the second color block images, comprising: obtaining the color blocks of different concentrations corresponding to each color ink and determining the color block with the highest clarity, denoted as the optimal color block; obtaining the ink concentration corresponding to the optimal color block, denoted as the optimal ink concentration.

4. The method of adjusting ink density for printing test images based on light source according to claim 3, wherein, The method further comprises: controlling the camera to capture the first color block images under different light source parameters to obtain second color block images; obtaining the mapping relationship between the optimal ink concentration of each different color ink and the light source parameters from the second color block images, denoted as the concentration-light source mapping relationship.

5. The method of adjusting ink density for printing test images based on light source according to claim 3, wherein, The method further comprises: controlling the camera to capture the first color block images under different light source parameters to obtain second color block images; obtaining the one-to-one correspondence between the optimal ink concentration of each different color ink and the light source parameters from the second color block images; performing curve fitting according to the one-to-one correspondence to obtain a concentration-light source relationship formula.

6. The method of adjusting ink density for printing test images based on light source according to claim 1, wherein, The printing data is obtained according to the optimal ink concentration corresponding to each different color ink, comprising: obtaining a first test image to be printed; performing RIP processing on the first test image to be printed to obtain the ink dot data corresponding thereto; adjusting the ink dot data according to the optimal ink concentration to obtain the printing data.

7. The method of adjusting ink density for printing test images based on light source according to claim 1, wherein, The printing data is generated according to the optimal ink concentration corresponding to each different color ink, comprising: generating a second test image to be tested according to the optimal ink concentration and a preset test rule; performing RIP processing on the second test image to be tested to obtain the printing data.

8. An apparatus for printing test images based on adjusting ink density of a light source, characterized by, The device comprises: an acquisition light source parameter module for acquiring the light source parameters of the camera; a color block printing module for obtaining first color block images by printing a plurality of color blocks of different concentrations using different color inks; an image acquisition module for obtaining second color block images by controlling the camera to capture the first color block images under the light source parameters; an ink concentration acquisition module for obtaining the ink concentration corresponding to each different color that meets the preset condition from the second color block images, denoted as the optimal ink concentration; a printing data acquisition module for obtaining the printing data according to the optimal ink concentration corresponding to each different color ink; a test image acquisition module for obtaining a test image by controlling the nozzle to print according to the printing data; A nozzle condition checking module for controlling the camera to capture the test image under the light source parameter and to perform nozzle condition detection according to the captured image.

9. Apparatus for printing test images based on ink density adjustment of a light source, characterized in that, 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 claims 1-7.

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

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