A fully automatic printing press adjustment device based on CCD recognition monitoring

Abstract

This invention discloses a fully automatic printing press adjustment device based on CCD recognition monitoring, including a CCD recognition component for acquiring printed images, the printed images including a first target image and a second target image; analyzing the background similarity between the first target image and a preset background image based on a cosine similarity algorithm, and generating an output voltage increase command based on the first target image; according to the output voltage increase command, increasing the voltage output of the drive motor of the conveying component within the execution time; generating an ink output speed adjustment command based on the second target image; this invention adjusts the ink output speed of the printing nozzle and the tension and speed of the conveying component in real time to adapt to changes in the characteristics of the printed matter, and promptly detects and handles abnormal situations, thereby improving the quality and stability of the printed matter.

Description

Technical Field

[0001] This invention relates to the field of intelligent printing technology, specifically to a fully automatic printing press adjustment device based on CCD recognition and monitoring. Background Technology

[0002] With the continuous development of technology, printing presses are widely used in various printing and printing-related industries. The functions and performance of printing presses are also constantly improving. They can achieve high-speed, high-precision, and high-quality image and text printing to meet the ever-changing market demands. In order to ensure the effect of the printed images captured by the CCD recognition component, anti-shake settings are required for the CCD recognition component. For example, Chinese patent CN103398735A, after its publication, disclosed a CCD adjustment device for printing presses, which is used for automatic alignment of printing presses. This not only improves the alignment accuracy of the camera but also makes operation convenient, solving the problem of no shaking of the CCD adjustment device installed under the high rigidity structure required for large-area automatic alignment printing presses.

[0003] The existing technology has the following shortcomings:

[0004] 1. With the development of CCD recognition component image stabilization technology, the clarity of images captured by cameras has been greatly improved. However, in the application of printing presses, there is still a problem of unclear images. In the current technology, once an abnormal image is detected, a warning command is directly generated to remind the staff. This method results in warning commands being issued too frequently, which seriously reduces the staff's trust in the warning commands.

[0005] 2. Secondly, when a warning instruction is issued, staff need to analyze the cause of the image anomaly. This requires a high level of skill from the staff, increases the company's labor costs, is inefficient, and causes inconvenience to the adjustment of the printing press.

[0006] In view of this, the present invention proposes a fully automatic printing press adjustment device based on CCD recognition and monitoring. Summary of the Invention

[0007] The purpose of this invention is to provide a fully automatic printing press adjustment device based on CCD recognition and monitoring to solve the problems mentioned in the background art.

[0008] According to one aspect of the present invention, a fully automatic printing press adjustment device based on CCD recognition monitoring is provided, including a printing table and further comprising:

[0009] A label frame is placed on top of the printing table; it is used to position and mark printed materials.

[0010] The printing nozzle, located directly above the sign frame, is used for printing materials, specifically for controlling the ink output speed.

[0011] The conveying components, located at both ends of the printing table, are used to provide conveying tension and conveying speed to the printed materials;

[0012] The CCD recognition component is set at the bottom of the printing table and symmetrically installed at both ends of the printing table by fasteners. It is used to work with the identification frame to sample the printed matter placed on the table according to the collection time period to obtain the printed matter image. The printed matter image includes a first target image before the printing head prints and a second target image after the printing head prints. The collected printed matter image is then sent to the main control system.

[0013] The main control system analyzes the background similarity between the first target image and the preset background image based on the cosine similarity algorithm, and generates a normal pre-printed image or an abnormal pre-printed image based on the background similarity.

[0014] Based on the abnormal pre-printed map during the acquisition period, generate intermittent or frequent background anomaly information; based on the frequent background anomaly information, generate an output voltage increase command.

[0015] According to the output voltage increase command, the drive motor of the transmission component is increased in voltage output during the execution time; and during the execution time, the first target image captured by the CCD recognition component is received; the first target image is re-analyzed, and if the first target image continues to generate frequent background abnormal information, the printing machine is repaired.

[0016] If the first target image does not generate frequent background anomaly information, the printing nozzle is controlled to print the printed matter in the identification frame; the pixel anomaly coefficient of the second target image is generated by comparing and analyzing the pixel values ​​of the second target image with the preset pixel values, and the ink output speed adjustment command is generated based on the pixel anomaly coefficient of the second target image.

[0017] In a preferred embodiment, the label frame is provided with an inlet and an outlet along its length, the opening length of the inlet and outlet being greater than the width of the printed matter. An inner groove frame for positioning the printed matter is formed between the inlet and outlet. A cleaning brush and a pressure roller are respectively provided at the outer ends of the inlet and outlet along the length. The cleaning brush slides freely in an adjustment groove, which is located along the length of the label frame.

[0018] In a preferred embodiment, the conveying assembly includes a driving roller, a first driven roller, a second driven roller, and a counterweight roller; the first driven roller and the second driven roller are respectively disposed between the driving roller and the counterweight roller, the counterweight rollers are respectively connected to a drive motor via sliders, the sliders slide within the chute, and the chute is provided with limit protrusions along its width direction.

[0019] In a preferred embodiment, the CCD recognition component includes a plurality of CCD cameras, which are evenly distributed at the four corners of the identification frame, and the area of ​​the image captured by each CCD camera is the same.

[0020] In a preferred embodiment, the analysis logic of the first target image is as follows:

[0021] Step S211: The identification frame before printing is sampled frame by frame by the CCD recognition component to obtain the first target image corresponding to N time frames within the identification frame;

[0022] Step S212: Calculate the background similarity between each of the first target images and the preset background image using a cosine similarity algorithm;

[0023] Step S213: If the background similarity is greater than the preset background threshold, then mark the corresponding first target image as a normal pre-printed image;

[0024] Step S214: If the background similarity is less than or equal to the preset background threshold, mark the corresponding first target image as an abnormal pre-printed image;

[0025] Step S215: Mark the ratio of the number of abnormal preprints to the number of N first target images as the anomalous ratio, and calculate the dispersion value of all abnormal preprints in the N first target images according to the time order of the time frame.

[0026] Step S216: Mark cases where the anomaly ratio is less than or equal to a preset anomaly threshold as case A, cases where the anomaly ratio is greater than a preset anomaly threshold as case B, cases where the dispersion value is less than or equal to a preset standard deviation threshold as case C, and cases where the dispersion value is greater than a preset standard deviation threshold as case D.

[0027] Step S217: Mark the abnormal preprints that simultaneously exhibit both conditions A and C as occasional background anomaly information;

[0028] Step S218: Mark any abnormal preprint map except those that simultaneously have both A and C conditions as frequent background anomaly information;

[0029] Step S219: Generate an output voltage increase command based on frequent background anomaly information.

[0030] In a preferred embodiment, the output voltage increase command further includes the following steps:

[0031] Step S220: According to the output voltage increase command, increase the voltage output of the drive motor of the transmission component during the execution time; and during the execution time, receive the first target image captured by the CCD recognition component;

[0032] Step S221: Re-analyze the first target image, repeat steps S211-S218. If the first target image continues to generate frequent background anomaly information, then the current printing machine will be repaired.

[0033] Step S222: If the first target image does not generate frequent background anomaly information, then control the printing nozzle to print the printed matter in the marking frame.

[0034] In a preferred embodiment, the analysis logic of the second target image is as follows:

[0035] The marking frame after printing is sampled frame by frame by the CCD recognition component to obtain the second target image corresponding to Y time frames within the marking frame;

[0036] Each second target image is divided into J unit printing regions. The pixel values ​​corresponding to each unit printing region are compared and analyzed with preset pixel values. If the pixel values ​​corresponding to the unit printing region are consistent with the preset pixel values, it means that the current unit printing region is a normal pixel region; if the pixel values ​​corresponding to the unit printing region are inconsistent with the preset pixel values, it means that the current unit printing region is an abnormal pixel region.

[0037] Extract K abnormal pixel regions from the second target image, and divide these abnormal pixel regions into X abnormal pixel regions corresponding to different abnormal types. Calculate the area of ​​the abnormal pixel region corresponding to the xth abnormal type as QY. x Where x = 1, 2, ..., X, X ≥ 1;

[0038] The anomaly type of each pixel anomaly region is matched with the pixel influence factor corresponding to the preset anomaly type, and the evaluation influence factor of the pixel anomaly region corresponding to the x-th anomaly type is obtained as α. x ;

[0039] The pixel anomaly coefficient P of the second target image is obtained by weighting and accumulating the area of ​​the pixel anomaly region corresponding to X anomaly types and the evaluation influence factor. WL The specific formula is:

[0040]

[0041] Among them, there are Y second target images corresponding to Y time frames; the second target image corresponding to the y-th time frame contains X pixel anomaly regions corresponding to anomaly types.

[0042] In a preferred embodiment, the ink output speed adjustment command includes an accelerated ink output command, a decelerated ink output command, and a normal speed ink output command.

[0043] The pixel anomaly coefficient PWL The pixel values ​​are compared with the preset pixel thresholds [YW1, YW2], and YW1 < YW2.

[0044] If P WL If the value is greater than YW2, the printed material corresponding to the current pixel anomaly coefficient will be marked as a printed material with excessively dark color, and a deceleration ink output command will be generated for the printed material with excessively dark color.

[0045] If YW1≤P WL If ≤YW2, then the printed material corresponding to the current pixel anomaly coefficient is marked as a printed material with excessively dark color, and an accelerated ink output command is generated for the printed material with excessively dark color.

[0046] If YW1 > P WL Then, the printed matter corresponding to the current pixel anomaly coefficient is marked as an overly dark printed matter, and a normal-speed ink output command is generated for the overly dark printed matter.

[0047] In a preferred embodiment, the logic for obtaining the evaluation influence factors of pixel anomaly regions corresponding to X anomaly types is as follows:

[0048] The evaluation influencing factors include a fixed influencing factor and a fluctuating influencing factor. The fixed influencing factor is the ratio of the pixel value of the corresponding pixel abnormal region to the preset pixel value. The fluctuating influencing factor is the ratio of the absolute value of the difference between the pixel value of the corresponding pixel abnormal region and the preset pixel value to the preset pixel value.

[0049] The fluctuation impact factor is determined according to any of the following methods:

[0050] If the pixel value of the corresponding abnormal pixel region is greater than or equal to the preset pixel value, the influence factor of the corresponding abnormal pixel region is increased.

[0051] If the pixel value of the corresponding abnormal pixel region is less than the preset pixel value, the influence factor corresponding to the abnormal pixel region will be reduced.

[0052] According to another aspect of the present invention, a fully automatic printing press adjustment method based on CCD recognition monitoring is provided, which is implemented based on the aforementioned fully automatic printing press adjustment device based on CCD recognition monitoring, and includes the following steps:

[0053] Step S1: Place the identification frame horizontally and fix it on the appropriate printing table, so that the length direction is parallel to the X-axis direction. Transport the printed material to be printed into the identification frame through the conveying component. The CCD recognition component samples the printed material to be printed during the acquisition period to obtain the first target image. Send the first target image to the main control system.

[0054] Step S2: The main control system analyzes the first target image and generates a normal pre-printed image or an abnormal pre-printed image. Based on the abnormal pre-printed image during the acquisition period, it generates occasional background anomaly information or frequent background anomaly information. Based on the frequent background anomaly information, it generates an output voltage increase command.

[0055] The analysis logic for the first target image is as follows:

[0056] Step S211: The identification frame before printing is sampled frame by frame by the CCD recognition component to obtain the first target image corresponding to N time frames within the identification frame;

[0057] Step S212: Calculate the background similarity between each of the first target images and the preset background image using a cosine similarity algorithm;

[0058] Step S213: If the background similarity is greater than the preset background threshold, then mark the corresponding first target image as a normal pre-printed image;

[0059] Step S214: If the background similarity is less than or equal to the preset background threshold, mark the corresponding first target image as an abnormal pre-printed image;

[0060] Step S215: Mark the ratio of the number of abnormal preprints to the number of N first target images as the anomalous ratio, and calculate the dispersion value of all abnormal preprints in the N first target images according to the time order of the time frame.

[0061] Step S216: Mark cases where the anomaly ratio is less than or equal to a preset anomaly threshold as case A, cases where the anomaly ratio is greater than a preset anomaly threshold as case B, cases where the dispersion value is less than or equal to a preset standard deviation threshold as case C, and cases where the dispersion value is greater than a preset standard deviation threshold as case D.

[0062] Step S217: Mark the abnormal preprints that simultaneously exhibit both conditions A and C as occasional background anomaly information;

[0063] Step S218: Mark any abnormal preprint map except those that simultaneously have both A and C conditions as frequent background anomaly information;

[0064] Step S219: Generate an output voltage increase command based on frequent background anomaly information.

[0065] The output voltage increase command also includes the following steps:

[0066] Step S220: According to the output voltage increase command, increase the voltage output of the drive motor of the transmission component during the execution time; and during the execution time, receive the first target image captured by the CCD recognition component;

[0067] Step S221: Re-analyze the first target image, repeat steps S211-S218. If the first target image continues to generate frequent background anomaly information, then the current printing machine will be repaired.

[0068] Step S3: If the first target image does not generate frequent background anomaly information, control the printing nozzle to print the printed matter in the identification frame; compare and analyze the second target image with the preset pixel values ​​based on the pixel values, generate the pixel anomaly coefficient of the second target image, and generate an ink output speed adjustment command based on the pixel anomaly coefficient of the second target image.

[0069] The ink output speed adjustment command includes an accelerated ink output command, a decelerated ink output command, and a normal speed ink output command.

[0070] The pixel anomaly coefficient P WL The pixel values ​​are compared with the preset pixel thresholds [YW1, YW2], and YW1 < YW2.

[0071] If P WL If the value is greater than YW2, the printed material corresponding to the current pixel anomaly coefficient will be marked as a printed material with excessively dark color, and a deceleration ink output command will be generated for the printed material with excessively dark color.

[0072] If YW1≤P WL If ≤YW2, then the printed material corresponding to the current pixel anomaly coefficient is marked as a printed material with excessively dark color, and an accelerated ink output command is generated for the printed material with excessively dark color.

[0073] If YW1 > P WL Then, the printed matter corresponding to the current pixel anomaly coefficient is marked as an overly dark printed matter, and a normal-speed ink output command is generated for the overly dark printed matter.

[0074] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0075] This invention adjusts the ink output speed of the printing nozzle and the tension and speed of the conveying components in real time to adapt to changes in the characteristics of the printed matter, and promptly detects and handles abnormal situations, thereby improving the quality and stability of the printed matter.

[0076] First, the main control system analyzes the background similarity between the first target image and a preset background image to generate a normal or abnormal pre-printing image. The main control system then adjusts the tension and speed of the conveyor component by controlling the motor output voltage. When frequent background anomalies are detected, an increased output voltage command increases the tension and speed of the conveyor component to ensure stable transport of the printed material. This prevents misalignment or deformation of the printed material during transport. If the first target image continues to generate frequent background anomalies, the system will determine that there is a problem with the printing press and initiate warranty repairs.

[0077] Then, by analyzing the pixel values ​​of the second target image and comparing them with preset pixel values, a pixel anomaly coefficient is generated for the second target image. Based on this anomaly coefficient, the system can generate an ink ejection speed adjustment command to control the ink ejection speed. In this way, the ink ejection volume can be adjusted according to the changes in the pixel values ​​of the printed material to achieve better printing results. Attached Figure Description

[0078] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0079] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0080] Figure 2 This is a front view of the overall structure of the present invention;

[0081] Figure 3 This is a schematic diagram of the structure of the identification frame of the present invention;

[0082] Figure 4 This is a schematic diagram of the structure of the transmission component of the present invention;

[0083] Figure 5 This is a schematic diagram of the regulating system structure of the present invention;

[0084] Figure 6 This is a flowchart of the adjustment method of the present invention.

[0085] Explanation of reference numerals in the attached figures:

[0086] 1. Identification frame; 11. Inner groove frame; 12. Inlet; 13. Cleaning brush; 14. Adjustment groove; 15. Outlet; 16. Pressure roller; 2. Printing nozzle; 3. Conveying assembly; 31. Driven roller; 32. First driven roller; 33. Second driven roller; 34. Counterweight roller; 35. Slide groove; 36. Sliding block; 37. Drive motor; 4. CCD recognition assembly; 5. Main control system. Detailed Implementation

[0087] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0088] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more exemplary embodiments. Numerous specific details are provided in the following description to give a full understanding of exemplary embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more specific details omitted, or other methods, components, steps, etc., can be employed. In other instances, well-known structures, methods, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0089] Example 1

[0090] This invention provides, for example Figures 1 to 5 The fully automatic printing press adjustment device shown includes:

[0091] Identification frame 1 is set on the top of the printing table; the identification frame on the top of the printing table is used to position and mark the printed matter; determining the position and boundary of the printed matter can determine the pixel size of the printed matter image acquired by the CCD recognition component 4;

[0092] Printing nozzle 2, located directly above the label frame 1, is used for printing printed materials, specifically for controlling the ink output speed;

[0093] Conveying components 3 are located at both ends of the printing table and are used to provide conveying tension and conveying speed to the printed materials. The function of the conveying components is to ensure the stable conveying of the printed materials during the printing process in order to obtain better printing results.

[0094] The CCD recognition component 4 is set at the bottom of the printing table and symmetrically set at both ends of the printing table by fasteners. It is used to work with the identification frame 1 to sample the printed matter placed therein according to the collection time period to obtain the printed matter image. The CCD recognition component 4 can capture the printed matter image, which includes a first target image before printing by the printing nozzle 2 and a second target image after printing by the printing nozzle 2; and send the captured printed matter image to the main control system 5.

[0095] It should be noted that: In operation, the existing printing press uses a CCD recognition component 4 fixed in a suitable position to capture the image within the identification frame 1. The printed image captured by the CCD recognition component 4 is used to evaluate the printing effect. If the difference from the preset design is too large, it indicates an abnormality in the printing press, requiring adjustment or repair. Therefore, the clarity of the printed image captured by the CCD recognition component 4 is crucial. In practical applications, preferably, the printed image includes a first target image and a second target image. Before printing, the conveying component 3 is activated to transport the printed material into the identification frame 1. The CCD recognition component 4 captures the printed image and marks the image before printing by the printhead 2 as the first target image, which is a timestamped first target image. The image after printing by the printhead 2 is marked as the second target image, which is also a timestamped second target image.

[0096] Main control system 5, such as Figure 5 As shown, the background similarity between the first target image and the preset background image is analyzed based on the cosine similarity algorithm, and a normal pre-printed image or an abnormal pre-printed image is generated based on the background similarity.

[0097] Based on the abnormal pre-printed map during the acquisition period, generate intermittent or frequent background anomaly information; based on the frequent background anomaly information, generate an output voltage increase command.

[0098] According to the output voltage increase command, the drive motor of the transmission component 3 is increased in voltage output during the execution time; and during the execution time, the first target image captured by the CCD recognition component 4 is received; the first target image is re-analyzed, and if the first target image continues to generate frequent background abnormal information, the current printing machine is repaired.

[0099] If the first target image does not generate frequent background anomaly information, the printing nozzle 2 is controlled to print the printed matter in the identification box 1; the pixel anomaly coefficient of the second target image is generated by comparing and analyzing the pixel values ​​of the second target image with the preset pixel values, and the ink output speed adjustment command is generated based on the pixel anomaly coefficient of the second target image.

[0100] It's important to note the following: First, the main control system analyzes the background similarity between the first target image and a preset background image to generate a normal or abnormal pre-printing image. The main control system then adjusts the tension and speed of the conveyor component by controlling the motor output voltage. When frequent background anomalies are detected, an increased output voltage command increases the tension and speed of the conveyor component to ensure stable transport of the printed material. This prevents misalignment or deformation of the printed material during transport. If the first target image continues to generate frequent background anomalies, the system will determine that there is a problem with the printing press and initiate warranty repairs.

[0101] Then, by analyzing the pixel values ​​of the second target image and comparing them with preset pixel values, a pixel anomaly coefficient is generated for the second target image. Based on this anomaly coefficient, the system can generate an ink ejection speed adjustment command to control the ink ejection speed. In this way, the ink ejection volume can be adjusted according to the changes in the pixel values ​​of the printed material to achieve better printing results.

[0102] like Figure 3 As shown, the marking frame 1 is provided with an inlet 12 and an outlet 15 along its length. The opening length of the inlet 12 and the outlet 15 is greater than the width of the printed matter. An inner groove frame 11 for positioning the printed matter is formed between the inlet 12 and the outlet 15. A cleaning brush 13 and a pressure roller 16 are respectively provided at the outer ends of the inlet 12 and the outlet 15 along the length. The cleaning brush 13 slides freely in the adjustment groove 14, which is located along the length of the marking frame 1.

[0103] It should be noted that before the printed material enters the inner slot frame 11, its surface is cleaned by a cleaning brush 13. The cleaning brush 13 slides freely in the adjusting groove 14 via a connected drive component, thus cleaning the surface of the printed material back and forth. At the conveying speed of the conveying component 3, the printed material is cleaned as many times as possible to ensure that the surface of the printed material entering the inner slot frame 11 is free of impurities. This horizontally placed cleaning brush also reduces wrinkles on the surface of the printed material. After printing is completed, the printed material output from the outlet 15 is pressed by the pressure roller 16 before being output. The pressure roller 16 uses appropriate pressure to prevent the paper from curling, wrinkling, or undergoing other deformations, ensuring the stability and reliability of the paper during the printing process. It can also help achieve some special effects, such as increasing gloss or creating a textured feel. By using different types of pressure rollers, various textures or patterns can be created on the surface of the printed material, enriching its appearance.

[0104] like Figure 4As shown, the conveying assembly 3 includes a driving roller 31, a first driven roller 32, a second driven roller 33, and a counterweight roller 34; the first driven roller 32 and the second driven roller 33 are respectively disposed between the driving roller 31 and the counterweight roller 34, and the counterweight roller 34 is connected to the drive motor 37 through a slider 36. The slider 36 slides in the groove 35, and the groove 35 is provided with a limit protrusion along its width direction.

[0105] It should be noted that this vertical arrangement further ensures the flatness of the printed material surface entering the printing table. A staggered conveying method allows for better control of the conveying speed. Furthermore, the first driven roller 32 and the second driven roller 33 can also serve as backup active roller 31. In practical applications, the required transmission force for the printed material can be adjusted according to actual needs and the law of conservation of energy, requiring only the active roller 31 and the counterweight roller 34 to be driven. The active roller 31 is directly driven by a motor to power the entire printing press. The first driven roller 32 and the second driven roller 33, through their coordinated movement with the active roller 31 and the counterweight roller 34, achieve the functions of pressing and transferring printing material during the printing process. The counterweight roller 34 provides balanced and stable pressure to ensure uniform pressing of the printing material during printing. The slider 36 slides within the groove 35, allowing adjustment of the counterweight roller's position and pressure to adapt to different printing requirements.

[0106] However, during daily use, the active roller 31 of the printing press may malfunction. If it is repaired directly, it will affect the printing progress. If printing is in progress, the interrupted prints will likely fail to meet production requirements, leading to an increase in defective products and affecting production efficiency. Therefore, when the active roller 31 may malfunction, the first driven roller 32 and the second driven roller 33 can be used as backup active rollers 31, while the original active roller 31 will function as a driven roller. This way, production can continue without affecting production. After production is completed, the control button can be turned off before repairing the active roller 31.

[0107] When the main control system 5 issues an output voltage increase command, it controls the drive motor 37 of the counterweight roller 34 to increase its output voltage, thereby increasing the pressure of the counterweight roller 34 and providing a more stable output environment for the printed matter. In actual use, the drive motor 37 controlling the counterweight roller 34 is generally adjusted to a suitable output voltage; therefore, during automatic adjustment, it is adjusted at most once or twice. Therefore, a slider 36 is also provided at the connection between the counterweight roller 34 and the drive motor 37 for adjustment and control. The slider 36 moves along the width direction in the groove, and the sliding range of the slider can be limited by a limiting protrusion to ensure that the position and pressure of the counterweight roller remain within the specified range, thus guaranteeing the quality and stability of the printed matter.

[0108] The CCD recognition component 4 includes several CCD cameras, which are evenly distributed at the four corners of the identification frame 1, and the area of ​​the image captured by each CCD camera is the same.

[0109] It should be noted that because the CCD cameras 41 are evenly distributed at the four corners of the marker frame 1, they can cover the entire area of ​​the marker frame 1. Each CCD camera 41 acquires an image area of ​​the same size, meaning each camera is responsible for capturing an image area of ​​the same size. By using multiple CCD cameras 41, image data from multiple angles and perspectives can be obtained. This image data can be used for target recognition, location positioning, and motion tracking. The even distribution of the cameras helps to obtain comprehensive image information, improving the accuracy and reliability of recognition and analysis.

[0110] Example 2

[0111] Please see Figures 1 to 6 As shown, this embodiment provides a detailed analysis process for the main control system 5 based on embodiment 1. This embodiment provides a fully automatic printing press adjustment method based on CCD recognition monitoring, as detailed below:

[0112] The analysis logic for the first target image is as follows:

[0113] Step S211: The CCD recognition component 4 samples the identification frame 1 before printing on the printing press frame by frame to obtain the first target image corresponding to N time frames within the identification frame 1.

[0114] Step S212: Calculate the background similarity between each of the first target images and the preset background image using a cosine similarity algorithm;

[0115] Step S213: If the background similarity is greater than the preset background threshold, then mark the corresponding first target image as a normal pre-printed image;

[0116] Step S214: If the background similarity is less than or equal to the preset background threshold, mark the corresponding first target image as an abnormal pre-printed image;

[0117] Step S215: Mark the ratio of the number of abnormal preprints to the number of N first target images as the anomalous ratio, and calculate the dispersion value of all abnormal preprints in the N first target images according to the time order of the time frame.

[0118] Step S216: Mark cases where the anomaly ratio is less than or equal to a preset anomaly threshold as case A, cases where the anomaly ratio is greater than a preset anomaly threshold as case B, cases where the dispersion value is less than or equal to a preset standard deviation threshold as case C, and cases where the dispersion value is greater than a preset standard deviation threshold as case D.

[0119] Step S217: Mark the abnormal preprints that simultaneously exhibit both conditions A and C as occasional background anomaly information;

[0120] Step S218: Mark any abnormal preprint map except those that simultaneously have both A and C conditions as frequent background anomaly information;

[0121] Step S219: Generate an output voltage increase command based on frequent background anomaly information;

[0122] Step S220: According to the output voltage increase instruction, increase the voltage output of the drive motor of the transmission component 3 during the execution time; and during the execution time, receive the first target image captured by the CCD recognition component 4;

[0123] Step S221: Re-analyze the first target image, repeat steps S211-S218. If the first target image continues to generate frequent background anomaly information, then the current printing machine will be repaired.

[0124] Step S222: If the first target image does not generate frequent background anomaly information, then control the printing nozzle 2 to print the printed matter in the identification box 1.

[0125] It's important to note that the above steps allow the printing press to analyze the background similarity of the printed materials before printing. Since the printed materials used for printing are identical to the preset background image, calculating the similarity between the two using cosine similarity allows for the determination of whether the background of the printed materials is normal. This helps in detecting whether the printing press is working properly and whether the printed materials are placed correctly.

[0126] The first target image is labeled as a normal pre-print image or an abnormal pre-print image. An abnormal pre-print image indicates potential anomalies in the printed material or printing press, such as background mismatch or other problems. Based on thresholds for the anomaly ratio and dispersion value, abnormal pre-print images are categorized into occasional background anomalies and frequent background anomalies. This helps distinguish between temporary, occasional anomalies and persistent, frequently occurring anomalies.

[0127] Based on frequent background anomaly information, the system generates an output voltage increase command to adjust the motor output voltage of the conveyor component. By increasing the voltage output, the tension and speed of the conveyor component can be improved to ensure stable delivery of printed materials. If frequent background anomaly information continues to be generated for the first target image, a problem with the printing press is identified, and warranty processing is initiated. This helps to promptly detect and resolve printing press malfunctions, ensuring print quality and the normal operation of the equipment.

[0128] The analysis logic for the second target image is as follows:

[0129] The CCD recognition component 4 samples the identification frame 1 after printing by the printing press frame by frame to obtain the second target image corresponding to Y time frames in the identification frame 1.

[0130] Each second target image is divided into J unit printing regions. The pixel values ​​corresponding to each unit printing region are compared and analyzed with preset pixel values. If the pixel values ​​corresponding to the unit printing region are consistent with the preset pixel values, it means that the current unit printing region is a normal pixel region; if the pixel values ​​corresponding to the unit printing region are inconsistent with the preset pixel values, it means that the current unit printing region is an abnormal pixel region.

[0131] Extract K abnormal pixel regions from the second target image, and divide these abnormal pixel regions into X abnormal pixel regions corresponding to different abnormal types. Calculate the area of ​​the abnormal pixel region corresponding to the xth abnormal type as QY. x Where x = 1, 2, ..., X, X ≥ 1;

[0132] The anomaly type of each pixel anomaly region is matched with the pixel influence factor corresponding to the preset anomaly type, and the evaluation influence factor of the pixel anomaly region corresponding to the x-th anomaly type is obtained as α. x ;

[0133] The pixel anomaly coefficient P of the second target image is obtained by weighting and accumulating the area of ​​the pixel anomaly region corresponding to X anomaly types and the evaluation influence factor. WL The specific formula is:

[0134]

[0135] Among them, there are Y second target images corresponding to Y time frames; the second target image corresponding to the y-th time frame contains X pixel anomaly regions corresponding to anomaly types.

[0136] It should be noted that: if the pixel values ​​in a unit printed area are consistent with the preset pixel values, the area is considered a normal pixel area; if they are inconsistent, the area is considered an abnormal pixel area. The abnormal pixel areas are then divided into different abnormality types, and statistical analysis is performed. Specifically, a formula is used to calculate the pixel abnormality coefficient P for each time frame corresponding to a second target image. Each second target image contains multiple abnormal pixel areas corresponding to different abnormality types. The pixel abnormality coefficient P can be obtained by weighted averaging of the second target images acquired during the same acquisition period. WL To assess pixel accuracy in order to adjust ink output speed;

[0137] To more precisely adjust the ink output speed, preferably, the logic for obtaining the evaluation influence factors of the pixel anomaly regions corresponding to X anomaly types is as follows:

[0138] The evaluation influencing factors include a fixed influencing factor and a fluctuating influencing factor. The fixed influencing factor is the ratio of the pixel value of the corresponding pixel abnormal region to the preset pixel value. The fluctuating influencing factor is the ratio of the absolute value of the difference between the pixel value of the corresponding pixel abnormal region and the preset pixel value to the preset pixel value.

[0139] The fluctuation impact factor is determined according to any of the following methods:

[0140] If the pixel value of the corresponding pixel anomaly region is greater than or equal to the preset pixel value, the evaluation influence factor of the corresponding pixel anomaly region is increased.

[0141] If the pixel value of the corresponding abnormal pixel region is less than the preset pixel value, the evaluation impact factor corresponding to the abnormal pixel region will be reduced.

[0142] It should be noted here that: the pixels after printing are analyzed to assess the normality of the pixels. The ratio of the pixel value of the corresponding abnormal pixel area to the preset pixel value is used to ensure that the fixed influence factor is larger when the current pixel value is greater than the preset pixel value, and smaller when the current pixel value is less than the preset pixel value. Then, the fluctuation influence factor is obtained by using the absolute value of the difference between the pixel value of the corresponding abnormal pixel area and the preset pixel value and the preset pixel value.

[0143] The evaluation impact factor for a current pixel value greater than a preset pixel value is the sum of a fixed impact factor and a fluctuation impact factor.

[0144] The evaluation impact factor for a current pixel value being less than a preset pixel value is the difference between a fixed impact factor and a fluctuating impact factor.

[0145] This allows for a better understanding of the degree and type of pixel anomalies, thereby enabling the evaluation of print quality and adjustment of ink output speed.

[0146] The ink output speed adjustment command includes an accelerated ink output command, a decelerated ink output command, and a normal speed ink output command.

[0147] The pixel anomaly coefficient P WL The pixel values ​​are compared with the preset pixel thresholds [YW1, YW2], and YW1 < YW2.

[0148] If P WL If the value is greater than YW2, the printed material corresponding to the current pixel anomaly coefficient will be marked as a printed material with excessively dark color, and a deceleration ink output command will be generated for the printed material with excessively dark color.

[0149] If YW1≤P WL If ≤YW2, then the printed material corresponding to the current pixel anomaly coefficient is marked as a printed material with excessively dark color, and an accelerated ink output command is generated for the printed material with excessively dark color.

[0150] If YW1 > P WL Then, the printed matter corresponding to the current pixel anomaly coefficient is marked as a dark-colored printed matter, and a normal-speed ink output command is generated for the dark-colored printed matter.

[0151] It should be noted here that: based on the pixel anomaly coefficient of the second target image, an ink ejection speed adjustment command is generated to control the ink ejection speed. This allows for adjustment of the ink jet volume according to changes in the pixel values ​​of the printed material, achieving better printing results; this process is determined based on the magnitude of pixel deviation.

[0152] This invention adjusts the ink output speed of the printing nozzle and the tension and speed of the conveying components in real time to adapt to changes in the characteristics of the printed matter, and promptly detects and handles abnormal situations, thereby improving the quality and stability of the printed matter and obtaining high-quality printing results.

[0153] Example 3

[0154] like Figure 6 As shown, parts not described in detail in this embodiment are described in Embodiment 1. This embodiment provides a fully automatic printing press adjustment method based on CCD recognition monitoring, which is implemented based on a fully automatic printing press adjustment device based on CCD recognition monitoring, and includes the following steps:

[0155] Step S1: Place the identification frame 1 horizontally and fix it on the appropriate printing table, so that the length direction is parallel to the X-axis direction. Transport the printed material to be printed into the identification frame 1 through the conveying component 3. The CCD recognition component 4 samples the printed material to be printed during the acquisition period to obtain the first target image. Send the first target image to the main control system 5.

[0156] Step S2: The main control system 5 analyzes the first target image and generates a normal pre-printed image or an abnormal pre-printed image. Based on the abnormal pre-printed image during the acquisition period, it generates occasional background anomaly information or frequent background anomaly information. Based on the frequent background anomaly information, it generates an output voltage increase command.

[0157] The analysis logic for the first target image is as follows:

[0158] Step S211: The CCD recognition component 4 samples the identification frame 1 before printing on the printing press frame by frame to obtain the first target image corresponding to N time frames within the identification frame 1.

[0159] Step S212: Calculate the background similarity between each of the first target images and the preset background image using a cosine similarity algorithm;

[0160] Step S213: If the background similarity is greater than the preset background threshold, then mark the corresponding first target image as a normal pre-printed image;

[0161] Step S214: If the background similarity is less than or equal to the preset background threshold, mark the corresponding first target image as an abnormal pre-printed image;

[0162] Step S215: Mark the ratio of the number of abnormal preprints to the number of N first target images as the anomalous ratio, and calculate the dispersion value of all abnormal preprints in the N first target images according to the time order of the time frame.

[0163] Step S216: Mark cases where the anomaly ratio is less than or equal to a preset anomaly threshold as case A, cases where the anomaly ratio is greater than a preset anomaly threshold as case B, cases where the dispersion value is less than or equal to a preset standard deviation threshold as case C, and cases where the dispersion value is greater than a preset standard deviation threshold as case D.

[0164] Step S217: Mark the abnormal preprints that simultaneously exhibit both conditions A and C as occasional background anomaly information;

[0165] Step S218: Mark any abnormal preprint map except those that simultaneously have both A and C conditions as frequent background anomaly information;

[0166] Step S219: Generate an output voltage increase command based on frequent background anomaly information.

[0167] The output voltage increase command also includes the following steps:

[0168] Step S220: According to the output voltage increase instruction, increase the voltage output of the drive motor of the transmission component 3 during the execution time; and during the execution time, receive the first target image captured by the CCD recognition component 4;

[0169] Step S221: Re-analyze the first target image, repeat steps S211-S218. If the first target image continues to generate frequent background anomaly information, then the current printing machine will be repaired.

[0170] Step S3: If the first target image does not generate frequent background anomaly information, control the printing nozzle 2 to print the printed matter in the identification box 1; compare and analyze the second target image with the preset pixel values ​​based on the pixel values, generate the pixel anomaly coefficient of the second target image, and generate an ink output speed adjustment command based on the pixel anomaly coefficient of the second target image.

[0171] The ink output speed adjustment command includes an accelerated ink output command, a decelerated ink output command, and a normal speed ink output command.

[0172] The pixel anomaly coefficient P WL The pixel values ​​are compared with the preset pixel thresholds [YW1, YW2], and YW1 < YW2.

[0173] If P WL If the value is greater than YW2, the printed material corresponding to the current pixel anomaly coefficient will be marked as a printed material with excessively dark color, and a deceleration ink output command will be generated for the printed material with excessively dark color.

[0174] If YW1≤P WL If ≤YW2, then the printed material corresponding to the current pixel anomaly coefficient is marked as a printed material with excessively dark color, and an accelerated ink output command is generated for the printed material with excessively dark color.

[0175] If YW1 > P WL Then, the printed matter corresponding to the current pixel anomaly coefficient is marked as an overly dark printed matter, and a normal-speed ink output command is generated for the overly dark printed matter.

[0176] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fully automatic printing press adjustment device based on CCD recognition monitoring, comprising a printing table, characterized in that, Also includes: The identification frame (1) is set on the top of the printing table; it is used to position and mark the printed matter. The printing nozzle (2) is located directly above the label frame (1) and is used for printing printed materials, specifically for controlling the ink output speed. The conveying components (3) are set at both ends of the printing table to provide conveying tension and conveying speed to the printed matter; The CCD recognition component (4) is set at the bottom of the printing table and symmetrically installed at both ends of the printing table by fasteners. It is used to cooperate with the identification frame (1) to sample the placed printed matter according to the collection period and obtain the printed matter image. The printed matter image includes the first target image before the printing nozzle (2) prints and the second target image after the printing nozzle (2) prints. The collected printed matter image is sent to the main control system (5). The main control system (5) analyzes the background similarity between the first target image and the preset background image based on the cosine similarity algorithm, and generates a normal pre-printed image or an abnormal pre-printed image based on the background similarity. Based on the abnormal pre-printed images during the collection period, generate occasional or frequent background anomaly information; Based on frequent background anomaly information, an output voltage increase command is generated; According to the output voltage increase instruction, the drive motor of the transmission component (3) is increased in voltage output during the execution time; and during the execution time, the first target image captured by the CCD recognition component (4) is received; the first target image is re-analyzed, and if the first target image continues to generate frequent background abnormal information, the current printing machine is repaired; If the first target image does not generate frequent background anomaly information, the printing nozzle (2) is controlled to print the printed matter in the identification box (1); the pixel anomaly coefficient of the second target image is generated based on the pixel value comparison analysis between the second target image and the preset pixel value, and the ink output speed adjustment command is generated based on the pixel anomaly coefficient of the second target image.

2. The fully automatic printing press adjustment device based on CCD recognition monitoring according to claim 1, characterized in that, The marking frame (1) is provided with an inlet (12) and an outlet (15) along the length direction. The opening length of the inlet (12) and the outlet (15) is greater than the width of the printed matter. An inner groove frame (11) for positioning the printed matter is formed between the inlet (12) and the outlet (15). A cleaning brush (13) and a pressure roller (16) are provided at the outer ends of the inlet (12) and the outlet (15) along the length direction. The cleaning brush (13) slides freely in the adjustment groove (14). The adjustment groove (14) is set in the length direction of the marking frame (1).

3. The fully automatic printing press adjustment device based on CCD recognition monitoring according to claim 2, characterized in that, The conveying assembly (3) includes an active roller (31), a first driven roller (32), a second driven roller (33), and a counterweight roller (34); the first driven roller (32) and the second driven roller (33) are respectively disposed between the active roller (31) and the counterweight roller (34), and the counterweight roller (34) is connected to the drive motor (37) through a slider (36), the slider (36) slides in the groove (35), and the groove (35) is provided with a limit protrusion along its width direction.

4. The fully automatic printing press adjustment device based on CCD recognition monitoring according to claim 3, characterized in that, The CCD recognition component (4) includes several CCD cameras, which are evenly distributed at the four corners of the identification frame (1), and the area of ​​the image captured by each CCD camera is the same.

5. The fully automatic printing press adjustment device based on CCD recognition monitoring according to claim 1, characterized in that, The analysis logic for the first target image is as follows: Step S211: The CCD recognition component (4) samples the marking frame (1) before printing on the printing press frame by frame to obtain the marking frame (1) within the marking frame (1). The first target image corresponding to each time frame; Step S212: Calculate the background similarity between each of the first target images and the preset background image using a cosine similarity algorithm; Step S213: If the background similarity is greater than the preset background threshold, then mark the corresponding first target image as a normal pre-printed image; Step S214: If the background similarity is less than or equal to the preset background threshold; The corresponding first target image is marked as an abnormal preprint image; Step S215: Combine the number of abnormal pre-printed images with... The ratio of the number of first target images is labeled as the anomalous ratio, and is calculated according to the temporal order of the time frames. The discreteness values ​​of all anomalous preprints within a first target image; Step S216: Mark cases where the anomaly ratio is less than or equal to a preset anomaly threshold as case A, cases where the anomaly ratio is greater than a preset anomaly threshold as case B, cases where the dispersion value is less than or equal to a preset standard deviation threshold as case C, and cases where the dispersion value is greater than a preset standard deviation threshold as case D. Step S217: Mark the abnormal preprints that simultaneously exhibit both conditions A and C as occasional background anomaly information; Step S218: Mark any abnormal preprint map except those that simultaneously have both A and C conditions as frequent background anomaly information; Step S219: Generate an output voltage increase command based on frequent background anomaly information.

6. The fully automatic printing press adjustment device based on CCD recognition monitoring according to claim 5, characterized in that, The output voltage increase command also includes the following steps: Step S220: According to the output voltage increase instruction, increase the voltage output of the drive motor of the transmission component (3) during the execution time; and during the execution time, receive the first target image captured by the CCD recognition component (4); Step S221: Re-analyze the first target image, repeat steps S211-S218. If the first target image continues to generate frequent background anomaly information, then the current printing machine will be repaired. Step S222: If the first target image does not generate frequent background anomaly information, then control the printing nozzle (2) to print the printed matter in the identification box (1).

7. The fully automatic printing press adjustment device based on CCD recognition monitoring according to claim 6, characterized in that, The analysis logic for the second target image is as follows: The CCD recognition component (4) samples the printed mark frame (1) frame by frame to obtain the mark frame (1) within the mark frame (1). The second target image corresponding to each time frame; Each second target image is divided into For each unit printing area, the corresponding pixel value in each unit printing area is compared and analyzed with the preset pixel value. If the corresponding pixel value in the unit printing area is consistent with the preset pixel value, it means that the current unit printing area is a normal pixel area. If the pixel value corresponding to a unit printing area is inconsistent with the preset pixel value, it means that the current unit printing area is a pixel abnormality area. Extracting from the second target image Each pixel anomaly region is divided into several sub-regions to obtain... The pixel anomaly regions corresponding to the anomaly type are counted. The area of ​​the pixel anomaly region corresponding to each anomaly type is ,in, , ; The anomaly type of each pixel anomaly region is matched with the pixel influence factor corresponding to the preset anomaly type to obtain the first... The evaluation impact factor for the pixel anomaly region corresponding to each anomaly type is: ; Will The pixel anomaly coefficient of the second target image is obtained by weighting and accumulating the area of ​​the pixel anomaly region corresponding to each anomaly type and the evaluation influence factor. The specific formula is: ； in, Each time frame corresponds to The second target image; the first The second target image corresponding to each time frame contains Each anomaly type corresponds to a pixel anomaly region.

8. The fully automatic printing press adjustment device based on CCD recognition monitoring according to claim 7, characterized in that, The ink output speed adjustment command includes an accelerated ink output command, a decelerated ink output command, and a normal speed ink output command. Pixel anomaly coefficient With preset pixel threshold Comparative analysis, and , like Then, the printed matter corresponding to the current pixel anomaly coefficient is marked as a printed matter with excessively dark color, and a deceleration ink output command is generated for the printed matter with excessively dark color. like Then, the printed material corresponding to the current pixel anomaly coefficient is marked as a printed material with excessively dark color, and an accelerated ink output command is generated for the printed material with excessively dark color. like Then, the printed matter corresponding to the current pixel anomaly coefficient is marked as an overly dark printed matter, and a normal-speed ink output command is generated for the overly dark printed matter.

9. A fully automatic printing press adjustment device based on CCD recognition monitoring according to claim 7, characterized in that, right The logic for obtaining the evaluation impact factor of the pixel anomaly region corresponding to each anomaly type is as follows: The evaluation influencing factors include a fixed influencing factor and a fluctuating influencing factor. The fixed influencing factor is the ratio of the pixel value of the corresponding pixel abnormal region to the preset pixel value. The fluctuating influencing factor is the ratio of the absolute value of the difference between the pixel value of the corresponding pixel abnormal region and the preset pixel value to the preset pixel value. The fluctuation impact factor is determined according to any of the following methods: If the pixel value of the corresponding abnormal pixel region is greater than or equal to the preset pixel value, the influence factor of the corresponding abnormal pixel region is increased. If the pixel value of the corresponding abnormal pixel region is less than the preset pixel value, the influence factor corresponding to the abnormal pixel region will be reduced.

10. A fully automatic printing press adjustment method based on CCD recognition monitoring, implemented based on any one of the fully automatic printing press adjustment devices based on CCD recognition monitoring according to claims 1-9, characterized in that, Includes the following steps: Step S1: Place the identification frame (1) horizontally and fix it on the appropriate printing table so that the length direction is parallel to the X-axis direction. Transport the printed matter to be printed into the identification frame (1) through the conveying component (3). The CCD recognition component (4) samples the printed matter to be printed during the acquisition period to obtain the first target image. Send the first target image to the main control system (5). Step S2: The main control system (5) analyzes the first target image and generates a normal pre-printed image or an abnormal pre-printed image. Based on the abnormal pre-printed image during the acquisition period, it generates occasional background abnormal information or frequent background abnormal information. Based on frequent background anomaly information, an output voltage increase command is generated; The analysis logic for the first target image is as follows: Step S211: The CCD recognition component (4) samples the marking frame (1) before printing on the printing press frame by frame to obtain the marking frame (1) within the marking frame (1). The first target image corresponding to each time frame; Step S212: Calculate the background similarity between each of the first target images and the preset background image using a cosine similarity algorithm; Step S213: If the background similarity is greater than the preset background threshold, then mark the corresponding first target image as a normal pre-printed image; Step S214: If the background similarity is less than or equal to the preset background threshold; The corresponding first target image is marked as an abnormal preprint image; Step S215: Combine the number of abnormal pre-printed images with... The ratio of the number of first target images is labeled as the anomalous ratio, and is calculated according to the temporal order of the time frames. The discreteness values ​​of all anomalous preprints within a first target image; Step S216: Mark cases where the anomaly ratio is less than or equal to a preset anomaly threshold as case A, cases where the anomaly ratio is greater than a preset anomaly threshold as case B, cases where the dispersion value is less than or equal to a preset standard deviation threshold as case C, and cases where the dispersion value is greater than a preset standard deviation threshold as case D. Step S217: Mark the abnormal preprints that simultaneously exhibit both conditions A and C as occasional background anomaly information; Step S218: Mark any abnormal preprint map except those that simultaneously have both A and C conditions as frequent background anomaly information; Step S219: Generate an output voltage increase command based on frequent background anomaly information; The output voltage increase command also includes the following steps: Step S220: According to the output voltage increase instruction, increase the voltage output of the drive motor of the transmission component (3) during the execution time; and during the execution time, receive the first target image captured by the CCD recognition component (4); Step S221: Re-analyze the first target image, repeat steps S211-S218. If the first target image continues to generate frequent background anomaly information, then the current printing machine will be repaired. Step S3: If the first target image does not generate frequent background anomaly information, control the printing nozzle (2) to print the printed matter in the identification box (1); compare and analyze the second target image with the preset pixel value based on the pixel value, generate the pixel anomaly coefficient of the second target image, and generate the ink output speed adjustment command based on the pixel anomaly coefficient of the second target image. The ink output speed adjustment command includes an accelerated ink output command, a decelerated ink output command, and a normal speed ink output command. Pixel anomaly coefficient With preset pixel threshold Comparative analysis, and , like Then, the printed matter corresponding to the current pixel anomaly coefficient is marked as a printed matter with excessively dark color, and a deceleration ink output command is generated for the printed matter with excessively dark color. like Then, the printed material corresponding to the current pixel anomaly coefficient is marked as a printed material with excessively dark color, and an accelerated ink output command is generated for the printed material with excessively dark color. like Then, the printed matter corresponding to the current pixel anomaly coefficient is marked as an overly dark printed matter, and a normal-speed ink output command is generated for the overly dark printed matter.

Images