A printing typesetting system and method based on online automatic typesetting design

Abstract

The present invention discloses a printing and typesetting system and method based on online automatic typesetting design, which relates to the technical field of printing and typesetting. The technical key points of the scheme are: measuring the reflection factors of different printing areas before and after printing, calculating the ink absorption index of the printed paper, comparing the pixel values ​​of the paper sample image before drying with the pixel values ​​of the paper sample image after drying, calculating the diffusion index of the ink, collecting several sets of pressure data, combining the roller diameter and the roller length to calculate the printing pressure, further calculating the printing pressure index, calculating the comprehensive printing performance index through the ink absorption index of the printed paper, the ink diffusion index and the printing pressure index, comparing the comprehensive printing performance index with the printing performance threshold, and performing corresponding control on the font and typesetting according to the comparison result, thereby avoiding the unclear phenomenon caused by the expansion of the ink.

Description

Technical Field

[0001] The present invention relates to the technical field of printing and typesetting, and in particular to a printing and typesetting system and method based on online automatic typesetting design. Background Art

[0002] With the rapid development of digitalization and network technology, traditional printing and typesetting methods can no longer meet the modern demand for efficient and flexible design. In recent years, with the continuous advancement of cloud computing, big data and artificial intelligence technologies, online automatic typesetting design technology has gradually emerged. This technology can use computer algorithms and intelligent analysis to quickly and accurately complete typesetting design tasks.

[0003] In the Chinese invention application with application publication number CN113177398A, an online automatic typesetting system and method based on the electronic newspaper format are disclosed. The automatic typesetting system includes a front-end web module for receiving typesetting requests, uploading typesetting editing parameters and displaying typesetting styles; a back-end server module for extracting the graphic content of each material file, and being able to use the FFD algorithm and FirstFit algorithm to design typesetting and perform typesetting operations; a database module, which establishes a connection with the server through an API and is used to store typesetting template information; the back-end server module is connected to the front-end web module and the database module respectively.

[0004] In view of the above invention application, the prior art has the following deficiencies:

[0005] When conducting automated typesetting design, the comprehensive consideration of key factors such as the paper's ink absorption, ink diffusion, and printing pressure is often overlooked. This neglect leads to frequent quality problems in printed products, such as blurred and unclear text, and even missing strokes and broken lines due to improper ink expansion, which greatly affects the overall quality and visual effect of the printed products. Summary of the Invention

[0006] (1) Technical problems solved

[0007] In response to the shortcomings of the existing technology, the present invention provides a printing typesetting system and method based on online automatic typesetting design. By comprehensively considering the ink absorbency of the paper, the diffusion of the ink and the printing pressure, it ensures that the printing quality is always maintained at the best state, thereby effectively avoiding the unclear phenomenon caused by ink expansion, and solving the problems mentioned in the background technology.

[0008] (2) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: A printing typesetting system based on online automatic typesetting design, comprising:

[0010] The paper ink absorption analysis module uses a printing device to evenly print ink on the printing paper at the same intervals and the same area, measures the reflection factor of different printing areas before and after printing, and calculates the ink absorption index of the printing paper;

[0011] The ink diffusion analysis module collects paper sample images before and after the ink is completely dried, performs binarization processing, obtains the pixel value of each pixel in the paper sample image, compares the pixel values ​​of the paper sample image before drying with the pixel values ​​of the paper sample image after drying, and calculates the ink diffusion index;

[0012] The printing pressure analysis module collects several sets of pressure data and calculates the printing pressure based on the roller diameter and length. The printing pressure corresponding to each set of pressure data is converted to a dimensionless value to obtain the printing pressure index.

[0013] The font and typesetting control module calculates the comprehensive printing performance index through the ink absorption index of the printing paper, the ink diffusion index and the printing pressure index, compares the comprehensive printing performance index with the printing performance threshold, and controls the font and typesetting accordingly based on the comparison results.

[0014] Furthermore, the ink is evenly printed on the printing paper at the same interval and the same area using printing equipment, ensuring that the ink supply, printing speed, and printing pressure parameters of each printing are consistent. After printing, the ink is allowed to stay on the printing paper for t minutes, where t is any value among 1, 2, 5, and 10, to ensure that the ink fully penetrates the paper.

[0015] Furthermore, the reflection factor of each printing area before and after printing is obtained to calculate the ink absorption index of the printing paper. The calculation formula is as follows:

[0016]

[0017] Among them, Kn represents the ink absorption index of printing paper, represents the reflection factor of the i-th printing area before printing, represents the reflection factor of the i-th printing area after printing, , N is a positive integer.

[0018] Furthermore, before the ink dries, a high-resolution camera is used to capture the printed paper sample image, and after the ink is completely dried, the printed paper sample image is captured again, and the paper sample images before and after the ink is completely dried are binarized respectively.

[0019] Furthermore, the pixel value of each pixel in the paper sample image is obtained, the pixel value of the paper sample image before drying is compared with the pixel value of the paper sample image after drying, and the diffusion index of the ink is calculated using the following formula:

[0020]

[0021] Among them, Is represents the diffusion index of ink, Represents the pixel value of the pixel point at the coordinate (x, y) of the paper sample image before drying, Represents the pixel value of the pixel point at the coordinate (x, y) of the paper sample image after drying, , X is a positive integer, , Y is a positive integer.

[0022] Furthermore, the printing pressure is calculated by the pressure between the roller end faces, the roller diameter, and the roller length. The calculation formula is as follows:

[0023]

[0024] Among them, P represents printing pressure, F represents the pressure on the contact surface of the roller, D represents the roller diameter, L represents the roller length, and K represents the compensation coefficient. .

[0025] Furthermore, the printing pressure corresponding to each set of pressure data is obtained, and after dimensionless processing, the printing pressure index is calculated. The calculation formula is as follows:

[0026]

[0027] Among them, Pn represents the printing pressure index, Indicates the printing pressure corresponding to the jth set of pressure data, , M is a positive integer.

[0028] Furthermore, the comprehensive printing performance index is calculated through the ink absorption index of the printing paper, the ink diffusion index and the printing pressure index after linear normalization processing. The calculation formula is as follows:

[0029]

[0030] Among them, CPI represents the comprehensive printing performance index, Kn represents the ink absorption index of the printing paper, Is represents the ink diffusion index, and Pn represents the printing pressure index. 、 as well as represents the weight coefficient, and .

[0031] Furthermore, the comprehensive printing performance index is compared with the printing performance threshold, and the font and typesetting are controlled accordingly based on the comparison results, including:

[0032] When the comprehensive printing performance index is less than or equal to the printing performance threshold, the font and typesetting style are maintained;

[0033] When the comprehensive printing performance index is greater than the printing performance threshold, the font and layout adjustments are automatically triggered. Fonts with thicker strokes are selected to increase the ink adhesion area and reduce the unclear text caused by ink expansion. At the same time, the font spacing is increased to reduce the mutual influence of ink between adjacent texts.

[0034] A printing typesetting method based on online automatic typesetting design includes the following steps:

[0035] Step 1: Use a printing device to evenly print ink on the printing paper at the same intervals and the same area, measure the reflection factor of different printing areas before and after printing, and calculate the ink absorption index of the printing paper;

[0036] Step 2: Collect images of paper samples before and after the ink is completely dried, perform binarization processing, obtain the pixel value of each pixel in the paper sample image, compare the pixel values ​​of the paper sample image before drying with the pixel values ​​of the paper sample image after drying, and calculate the ink diffusion index;

[0037] Step 3: Collect several sets of pressure data, combine them with the roller diameter and roller length, calculate the printing pressure, and calculate the printing pressure index by converting the printing pressure corresponding to each set of pressure data into a dimensionless value.

[0038] Step 4: Calculate the comprehensive printing performance index through the ink absorption index of the printing paper, the ink diffusion index and the printing pressure index, compare the comprehensive printing performance index with the printing performance threshold, and control the font and typesetting accordingly based on the comparison results.

[0039] (3) Beneficial effects

[0040] The present invention provides a printing typesetting system and method based on online automatic typesetting design, which has the following beneficial effects:

[0041] (1) The calculated ink absorption index can accurately evaluate the ink absorption capacity of paper, which is crucial for optimizing the printing process and controlling the printing quality, because the ink absorption capacity of paper directly affects the color vividness and clarity of the printed product. It can provide real-time feedback to the printing equipment, helping the equipment to adjust the printing parameters, thereby ensuring printing quality and efficiency.

[0042] (2) By comparing the pixel values ​​before and after drying, the ink diffusion index can be accurately calculated, which helps to more accurately evaluate the behavior of the ink during the printing process, and then optimize the printing parameters and improve the printing quality. Through online automatic typesetting design and precise control of the ink diffusion index, the quality and effect of each batch of printed products can be ensured to be consistent.

[0043] (3) By accurately calculating the printing pressure, it can be ensured that the pressure distribution of each part during the printing process is uniform, avoiding printing quality problems caused by uneven pressure. Analyzing the pressure data and calculating the printing pressure index can provide support for decision-making in the printing process, such as selecting appropriate printing materials and adjusting printing process parameters.

[0044] (4) By real-time calculation and comparison of the comprehensive printing performance index and the printing performance threshold, the font, typesetting and printing parameters are automatically adjusted to ensure that the printing quality is always maintained at the best state, thereby effectively avoiding the unclear phenomenon caused by ink expansion and helping to reduce quality problems in the printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic diagram of the structure of the printing and typesetting system based on online automatic typesetting design of the present invention;

[0046] Figure 2 The figure is a flow chart of the printing typesetting method based on online automatic typesetting design of the present invention. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0048] See also Figure 1-Figure 2 The present invention provides a printing typesetting system based on online automatic typesetting design, including: a paper ink absorption analysis module, an ink diffusion analysis module, a printing pressure analysis module and a font and typesetting control module, wherein,

[0049] The paper ink absorption analysis module uses a printing device to evenly print ink on the printing paper at the same intervals and the same area, measures the reflection factor of different printing areas before and after printing, and calculates the ink absorption index of the printing paper;

[0050] Use printing equipment to evenly print ink on the printing paper at the same intervals and in the same area, ensuring that parameters such as ink supply, printing speed, and printing pressure are consistent for each printing. After printing, let the ink stay on the printing paper for a period of time, usually 2 minutes, to ensure that the ink fully penetrates the paper. Measure different printed areas of the printing paper to obtain the reflection factor before and after printing;

[0051] It should be noted that the "same spacing" refers to the positional spacing between each printed area. The reflection factor, also known as reflectivity or reflectance, refers to the ratio of the radiant flux reflected by an object to the radiant flux reflected by a perfectly reflecting diffuser under the same conditions. The reflection factor of printed paper can be measured using a reflectance photometer or a whiteness meter. The measurement conditions, including light source and measurement angle, must be consistent.

[0052] Obtain the reflection factor of each printing area before and after printing, and calculate the ink absorption index of the printed paper. The calculation formula is as follows:

[0053]

[0054] Among them, Kn represents the ink absorption index of printing paper, represents the reflection factor of the i-th printing area before printing, represents the reflection factor of the i-th printing area after printing, , N is a positive integer;

[0055] It should be noted that the ink absorption index indicates the degree of reduction in the reflectance factor of the paper after printing. When the ink absorption index is large, it means that the reflectance factor of the paper is greatly reduced after printing, that is, the paper surface absorbs more ink, resulting in reduced reflected light. This usually means that the paper's ink absorption performance is poor, because the ink forms a thick ink layer on the paper surface instead of being effectively absorbed by the paper.

[0056] On the contrary, if the ink absorption index value is small, it means that the reflectivity of the paper decreases less after inking, that is, the paper surface absorbs less ink and reflects more light. This usually means that the paper has better ink absorption performance because the ink can be more evenly distributed on the paper surface, forming a clearer and more delicate printing effect.

[0057] The calculated ink absorption index can more accurately evaluate the paper's ability to absorb ink, which is crucial for optimizing the printing process and controlling printing quality, because the paper's ink absorption capacity directly affects the color vividness and clarity of the printed product. It can provide real-time feedback for printing equipment, helping the equipment adjust printing parameters to ensure printing quality and efficiency.

[0058] The ink diffusion analysis module collects paper sample images before and after the ink is completely dried, performs binarization processing, obtains the pixel value of each pixel in the paper sample image, compares the pixel values ​​of the paper sample image before drying with the pixel values ​​of the paper sample image after drying, and calculates the ink diffusion index;

[0059] Use printing equipment to evenly print ink on the printing paper at the same intervals and the same area, ensuring that parameters such as ink supply, printing speed, and printing pressure are consistent for each printing. Before the ink dries, use a high-resolution camera to capture images of the printed paper samples. After the ink is completely dry, capture the images of the printed paper samples again. Binarize the images of the paper samples before and after the ink is completely dried.

[0060] It should be noted that binarization, also known as binary image processing, is an image processing method based on the grayscale distribution of an image. In a grayscale image, the grayscale value of each pixel is between 0 (black) and 255 (white). The process of binarization is to set the grayscale value of the pixels on the image to 0 or 255, that is, to make the entire image appear to be only black and white.

[0061] Obtain the pixel value of each pixel in the image, compare the pixel value before drying with the pixel value after drying, and calculate the diffusion index of the ink. The calculation formula is as follows:

[0062]

[0063] Among them, Is represents the diffusion index of ink, Represents the pixel value of the pixel at coordinate (x, y) before drying, Represents the pixel value of the pixel point with coordinate (x,y) after drying, , X is a positive integer, , Y is a positive integer;

[0064] It should be noted that the larger the ink expansion index, the stronger the ink's ability to expand on the paper, that is, the easier it is for the ink to spread or expand on the paper during the printing process. Conversely, the smaller the ink expansion index, the weaker the ink's ability to expand on the paper. This expansion may affect the final visual effect of the printed product. If the ink expansion is too severe, it may cause problems such as blurred colors, unclear boundaries or color overflow, thereby affecting the clarity and readability of the printed product.

[0065] By comparing the pixel values ​​before and after drying, the ink diffusion index can be accurately calculated, which helps to more accurately evaluate the behavior of the ink during the printing process, and then optimize the printing parameters and improve the printing quality. Through online automatic typesetting design and precise control of the ink diffusion index, the quality and effect of each batch of printed products are ensured to be consistent.

[0066] The printing pressure analysis module collects several sets of pressure data and calculates the printing pressure based on the roller diameter and length. The printing pressure corresponding to each set of pressure data is converted to a dimensionless value to obtain the printing pressure index.

[0067] The pressure sensor collects several sets of pressure data, i.e., the pressure on the contact surface between the rollers, to obtain the actual printing equipment parameters, including roller diameter and roller length;

[0068] The printing pressure is calculated by the pressure between the roller end faces, the roller diameter and the roller length. The calculation formula is as follows:

[0069]

[0070] Among them, P represents printing pressure, F represents the pressure on the contact surface of the roller, D represents the roller diameter, L represents the roller length, and K represents the compensation coefficient. ;

[0071] It should be noted that the compensation coefficient K is usually used in the printing process to adjust or compensate for pressure changes caused by factors such as the roller profile, material properties, and speed. The optimal K value can be determined through actual printing experiments by adjusting the K value and observing the printing effect, such as ink color uniformity and dot gain. Alternatively, the value can be provided by the equipment manufacturer.

[0072] The printing pressure corresponding to each set of pressure data is obtained. After dimensionless processing, the printing pressure index is calculated. The calculation formula is as follows:

[0073]

[0074] Among them, Pn represents the printing pressure index, Indicates the printing pressure corresponding to the jth set of pressure data, , M is a positive integer;

[0075] It should be noted that when the printing pressure is insufficient, the ink transfer is insufficient, which may lead to insufficient ink coverage on the printed product and unclear images. When the printing pressure is excessive, the ink on the printing plate spreads to the blank area outside the image and text. Not only will the ink transfer rate not be improved, but it may also cause excessive ink expansion, resulting in serious dot enlargement of the printed product and obvious distortion of the image and text.

[0076] By accurately calculating the printing pressure, we can ensure that the pressure distribution of each part during the printing process is uniform, avoiding printing quality problems caused by uneven pressure. Analyzing the pressure data and calculating the printing pressure index can provide support for decision-making in the printing process, such as selecting appropriate printing materials and adjusting printing process parameters.

[0077] The font and typesetting control module calculates the comprehensive printing performance index through the ink absorption index of the printing paper, the ink diffusion index and the printing pressure index, compares the comprehensive printing performance index with the printing performance threshold, and controls the font and typesetting accordingly based on the comparison results.

[0078] The ink absorption index, ink diffusion index, and printing pressure index of the printing paper are obtained. After linear normalization, the comprehensive printing performance index is calculated. The calculation formula is as follows:

[0079]

[0080] Among them, CPI represents the comprehensive printing performance index, Kn represents the ink absorption index of the printing paper, Is represents the ink diffusion index, and Pn represents the printing pressure index. 、 as well as represents the weight coefficient, and ;

[0081] Pre-set the printing performance threshold, compare the comprehensive printing performance index with the printing performance threshold, and control the font and typesetting accordingly based on the comparison results, including:

[0082] When the comprehensive printing performance index is less than or equal to the printing performance threshold, the font and typesetting style are maintained;

[0083] When the comprehensive printing performance index is greater than the printing performance threshold, the font and layout adjustments are automatically triggered. Fonts with thicker strokes are selected to increase the ink adhesion area and reduce the unclear text caused by ink expansion. At the same time, the font spacing is increased to reduce the mutual influence of ink between adjacent texts.

[0084] It should be noted that during the printing process, if the ink diffusion index is high, that is, the ink is easy to diffuse on the paper, then when using fonts with thinner strokes, ink diffusion may cause the fonts to be blurred or overlapping. This is because the line spacing of thin strokes is narrower, and the ink is easy to contact or overlap with each other when diffusing, thus affecting the printing effect. On the contrary, if the strokes are thicker and the spacing between the lines is relatively large, the ink is not easy to contact or overlap with each other when diffusing, thereby maintaining the clarity and accuracy of the font.

[0085] By real-time calculation and comparison of the comprehensive printing performance index and printing performance threshold, the font, typesetting and printing parameters are automatically adjusted to ensure that the printing quality is always maintained at the best state, thereby effectively avoiding the unclear phenomenon caused by ink expansion and helping to reduce quality problems in the printing process.

[0086] See also Figure 2 The present invention also provides a printing typesetting method based on online automatic typesetting design, comprising the following steps:

[0087] Step 1: Use a printing device to evenly print ink on the printing paper at the same intervals and the same area, measure the reflection factor of different printing areas before and after printing, and calculate the ink absorption index of the printing paper;

[0088] Step 2: Collect images of paper samples before and after the ink is completely dried, perform binarization processing, obtain the pixel value of each pixel in the paper sample image, compare the pixel values ​​of the paper sample image before drying with the pixel values ​​of the paper sample image after drying, and calculate the ink diffusion index;

[0089] Step 3: Collect several sets of pressure data, combine them with the roller diameter and roller length, calculate the printing pressure, and calculate the printing pressure index by converting the printing pressure corresponding to each set of pressure data into a dimensionless value.

[0090] Step 4: Calculate the comprehensive printing performance index through the ink absorption index of the printing paper, the ink diffusion index and the printing pressure index, compare the comprehensive printing performance index with the printing performance threshold, and control the font and typesetting accordingly based on the comparison results.

[0091] In the application, the several formulas involved are all calculated by taking their numerical values ​​after removing the dimensions, and the formula is a formula obtained by collecting a large amount of data and performing software simulation to obtain the latest real situation. The coefficients in the formula are set by technical personnel in this field according to actual conditions.

[0092] The above embodiments can be implemented in whole or in part through software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. Those skilled in the art will appreciate that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented using a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution.

[0093] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, and may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment as needed.

[0094] The above is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the scope of protection of the present application.

Claims

1. A printing typesetting system based on online automatic typesetting design, characterized by: include: The paper ink absorption analysis module uses a printing device to evenly print ink on the printing paper at the same intervals and the same area, measures the reflection factor of different printing areas before and after printing, and calculates the ink absorption index of the printing paper; The ink diffusion analysis module collects paper sample images before and after the ink is completely dried, performs binarization processing, obtains the pixel value of each pixel in the paper sample image, compares the pixel values ​​of the paper sample image before drying with the pixel values ​​of the paper sample image after drying, and calculates the ink diffusion index; The printing pressure analysis module collects several sets of pressure data and calculates the printing pressure based on the roller diameter and length. The printing pressure corresponding to each set of pressure data is converted to a dimensionless value to obtain the printing pressure index. The font and typesetting control module calculates the comprehensive printing performance index based on the ink absorption index of the printing paper, the ink diffusion index, and the printing pressure index, compares the comprehensive printing performance index with the printing performance threshold, and controls the font and typesetting accordingly based on the comparison results; Obtain the reflection factor of each printing area before and after printing, and calculate the ink absorption index of the printed paper. The formula is as follows: ； Among them, Kn represents the ink absorption index of printing paper, represents the reflection factor of the i-th printing area before printing, represents the reflection factor of the i-th printing area after printing, , N is a positive integer; Before the ink dries, a camera is used to capture an image of a printed paper sample. After the ink is completely dried, the camera captures the image of the printed paper sample again. The images of the paper sample before and after the ink is completely dried are binarized respectively. Obtain the pixel value of each pixel in the paper sample image, compare the pixel value of the paper sample image before drying with the pixel value of the paper sample image after drying, and calculate the ink diffusion index. The formula is as follows: ； Among them, Is represents the diffusion index of ink, Represents the pixel value of the pixel point at the coordinate (x, y) of the paper sample image before drying, Represents the pixel value of the pixel point at the coordinate (x, y) of the paper sample image after drying, , X is a positive integer, , Y is a positive integer; The printing pressure is calculated by the pressure between the roller end faces, the roller diameter and the roller length. The formula is as follows: ； Among them, P represents printing pressure, F represents the pressure on the contact surface of the roller, D represents the roller diameter, L represents the roller length, and K represents the compensation coefficient. ; The printing pressure corresponding to each set of pressure data is obtained. After dimensionless processing, the printing pressure index is calculated. The formula is as follows: ； Among them, Pn represents the printing pressure index, Indicates the printing pressure corresponding to the jth set of pressure data, , M is a positive integer; The comprehensive printing performance index is calculated through linear normalization of the ink absorption index of the printing paper, the ink diffusion index and the printing pressure index. The formula is as follows: ； Among them, CPI represents the comprehensive printing performance index, Kn represents the ink absorption index of the printing paper, Is represents the ink diffusion index, and Pn represents the printing pressure index. 、 as well as represents the weight coefficient, and .

2. A printing typesetting system based on online automatic typesetting design according to claim 1, characterized in that: Use printing equipment to print ink evenly on the printing paper at the same intervals and in the same area, ensuring that the ink supply, printing speed, and printing pressure parameters remain consistent for each printing. Allow the ink to stay on the printing paper for t minutes after printing.

3. The printing typesetting system based on online automatic typesetting design according to claim 1, characterized in that: Compare the comprehensive printing performance index with the printing performance threshold. Based on the comparison results, control the font and typesetting accordingly, including: When the comprehensive printing performance index is less than or equal to the printing performance threshold, the font and typesetting style is maintained; When the comprehensive printing performance index is greater than the printing performance threshold, the font and typesetting adjustments are automatically triggered, and a font with thicker strokes is selected to increase the ink adhesion area, while increasing the font spacing.

4. A printing typesetting method based on online automatic typesetting design, applied to the system according to any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1: Use a printing device to evenly print ink on the printing paper at the same intervals and the same area, measure the reflection factor of different printing areas before and after printing, and calculate the ink absorption index of the printing paper; Step 2: Collect images of paper samples before and after the ink is completely dried, perform binarization processing, obtain the pixel value of each pixel in the paper sample image, compare the pixel values ​​of the paper sample image before drying with the pixel values ​​of the paper sample image after drying, and calculate the ink diffusion index; Step 3: Collect several sets of pressure data, combine them with the roller diameter and roller length, calculate the printing pressure, and calculate the printing pressure index by converting the printing pressure corresponding to each set of pressure data into a dimensionless value. Step 4: Calculate the comprehensive printing performance index through the ink absorption index of the printing paper, the ink diffusion index and the printing pressure index, compare the comprehensive printing performance index with the printing performance threshold, and control the font and typesetting accordingly based on the comparison results.

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