300-line animation printing product color management method, system, device and medium

Abstract

The application discloses a kind of 300 line cartoon printing color management method, system, device and medium, method includes respectively making 300 line standard color sample and cartoon test chart, and constructs difference value model;Based on difference value model, segmented plate compensation curve is generated;To be printed cartoon file is pre-press pretreated, and based on segmented plate compensation curve, to be printed cartoon file is compensated and proofing calibration curve, and CTP plate is generated;Printed sample is made using CTP plate, and the printing characteristic data of printed sample is monitored in real time, printing control variable is automatically adjusted using printing characteristic data, and target printing variable is obtained;Based on difference value model, segmented plate compensation curve and target printing variable, production template file is generated, and color management is completed.The application realizes accurate color management for 300 line cartoon printing, can guarantee the product color and dot consistency of different batches and different machine production, and improves product quality stability.

Description

Technical Field

[0001] This invention relates to the field of printing technology, specifically to a method, system, device, and medium for color management of 300-line animation printed materials. Background Technology

[0002] With the rapid development of the animation industry, the requirements for printing quality of mid-to-high-end animation derivative products (posters, booklets, collectible cards, figurine packaging, etc.) are constantly increasing. 300 LPI (lines per inch) halftone dots represent an ultra-high precision halftone process. This process, with its high dot density and rich tonal gradation, can accurately present the delicate colors, gradient transitions, and detailed textures of animation characters, while maintaining both color saturation and image clarity. It has become the mainstream production process for mid-to-high-end animation printed products.

[0003] However, the inherent characteristics of 300 LPI ultra-fine dots present significant technical challenges: dots are prone to loss, enlargement, or distortion, leading to loss of highlight detail, shadow banding, midtone banding, and color shift. Since 300 LPI anime prints contain numerous subtle tonal transitions, and traditional color management systems are primarily designed for 175 LPI-200 LPI standard screen rulings, they lack specific tonal compensation for 300 LPI dots, failing to address these issues. This is especially problematic in key areas of anime visuals, such as skin tones and gradations of light and shadow, where texture loss and color distortion frequently occur.

[0004] Furthermore, animation printing is characterized by small-batch, multi-batch, and multi-machine production. Traditional color management processes lack standardized production templates and a closed-loop control mechanism, resulting in poor color and dot consistency between different batches and machines, severely impacting product quality stability. While existing printing standards such as ISO 12647-2 provide a basic framework for high-resolution printing, they lack a dedicated parameter system and testing standards for 300 LPI animation printing, making it difficult to achieve accurate color reproduction and large-scale quality control.

[0005] Therefore, developing a standardized color management solution that adapts to the characteristics of 300 LPI halftone dots and the color requirements of animation printing has become a technical problem that the industry urgently needs to solve. Summary of the Invention

[0006] In view of this, the present invention provides a color management method, system, device and medium for 300-line animation printing, in order to solve the problems that the existing color management system cannot adapt to the characteristics of 300 LPI ultra-fine dots, cannot solve the color distortion and tonal abnormalities caused by dot deformation and loss, and the lack of a standardized control mechanism leads to poor product consistency between different batches and machines.

[0007] This invention provides a color management method for 300-line anime printed materials, the method comprising: Create a 300-line standard color sample and an animation test image respectively, and construct a difference model based on the 300-line standard color sample and the animation test image; Based on the aforementioned difference model, a segmented printing plate compensation curve adapted to the characteristics of 300-line halftone dots is generated. The animation file to be printed is pre-processed, and the pre-processed animation file to be printed is subjected to curve compensation and proofing calibration based on the segmented printing plate compensation curve to generate a CTP printing plate. The CTP printing plate is used to create a printed sample of the animation file to be printed, and the printing characteristic data of the printed sample is monitored in real time. The printing control variables are automatically adjusted using the printing characteristic data to obtain the target printing variables. Based on the difference model, the segmented printing plate compensation curve, and the target printing variable, a production template file is generated for printing the animation file to be printed, and color management is completed.

[0008] Optionally, based on the 300-line standard color sample and the animation test image, a difference model is constructed, including: A spectrophotometer was used to collect color feature data of color blocks in the 300-line standard color sample under a preset measurement environment; A dot matrix meter is used to acquire dot matrix feature data of a specified area in the animation test image; The standard design values ​​of the difference model are obtained in advance, and a difference matrix is ​​constructed based on the standard design values, the color feature data, and the dot feature data; The difference matrix is ​​iteratively optimized until it meets the preset conditions, thus obtaining the difference model.

[0009] Optionally, the 300-line standard color sample is specifically an array of color blocks containing CMYK and Lab values, and the acquired color feature data includes at least the solid color value, overprint color value and gray balance value of each color block.

[0010] Optionally, the designated areas in the anime test image include flat color block areas, gradient transition areas, fine line areas, and anime character skin and hair color areas, and the obtained dot feature data includes at least the dot area ratio of each designated area in different tonal ranges.

[0011] Optionally, the standard design values ​​include color characteristic standard values ​​and dot characteristic standard values; Based on the standard design values, the color feature data, and the dot feature data, a difference matrix is ​​constructed, including: Using the color feature data and the color feature standard value in the standard design value, the color feature difference of each standard color block is calculated; Using the network point feature data and the network point feature standard value in the standard design value, the network point feature difference value for each specified area is calculated; The difference matrix is ​​obtained by fusing all color feature differences and all halftone feature differences.

[0012] Optionally, the preset condition is specifically: all color differences in the difference matrix are less than or equal to a first preset threshold, and the absolute value of the deviation of all dot feature differences in the difference matrix is ​​less than or equal to a second preset threshold.

[0013] Optionally, the difference model includes network point feature data; Based on the aforementioned difference model, a segmented printing plate compensation curve adapted to the characteristics of 300-line halftone dots is generated, including: Based on the dot feature data in the difference model, the dot area ratio from 0% to 100% is divided into 0% to 20% highlight drop segment, 20% to 80% midtone segment and 80% to 100% shadow segment, and the mapping relationship between the input dot feature and the output dot feature of each tone segment in the difference model is extracted respectively. Calculate the inverse function of the mapping relationship for each tone segment, and perform compensation operation on each inverse function according to the preset compensation conditions to obtain the segmented printing plate compensation curve corresponding to each tone segment.

[0014] Optionally, the preset compensation conditions are as follows: under the premise that the color difference is less than or equal to the third preset threshold, the dot gain rate at 25% tone is controlled at 37±3%, the dot gain rate at 50% tone is controlled at 67±4%, and the dot gain rate at 75% tone is controlled at 88±3%.

[0015] Optionally, pre-processing of the animation files to be printed may be performed, including: The animation file to be printed is sequentially subjected to RGB to CMYK conversion and 300-line color separation processing.

[0016] Optionally, the pre-processed animation file to be printed is subjected to proofing calibration, including: The segmented printing plate compensation curve after curve compensation is loaded in the CTP plate-making machine; According to the specified printing conditions, a proof sheet is produced using the CTP printing press with the segmented printing plate compensation curve loaded with curve compensation. Obtain the color difference of all color blocks in the proof sample and the halftone feature difference at a specified tone; Based on the color difference of all color blocks and the dot feature difference at the specified tonal range, determine whether the proofing calibration of the pre-processed animation file to be printed is qualified; if so, complete the proofing calibration and output the CTP printing plate in the current state; otherwise, adjust the segmented printing plate compensation curve and reuse the adjusted segmented printing plate compensation curve to perform curve compensation and proofing calibration on the pre-processed animation file to be printed until the proofing calibration is qualified and output the corresponding CTP printing plate.

[0017] Optionally, based on the color difference of all color blocks and the dot feature difference at a specified tonal level, it is determined whether the proofing calibration of the preprocessed animation file to be printed is qualified, including: When the color difference of all color blocks is less than or equal to the fourth preset threshold and the dot feature difference at the specified tone is less than or equal to the fifth preset threshold, the proofing calibration is deemed qualified; otherwise, the proofing calibration is deemed unqualified.

[0018] Optionally, the printing feature data includes the actual color difference of each color block in the printed sample and the actual dot gain value of each color channel in each tone segment; the printing control variables include the ink bond opening parameter of the printing press ink zone, the ink-water balance parameter, and the printing pressure; The printing control variables are automatically adjusted using the aforementioned printing feature data to obtain the target printing variables, including: The ink zone of the printing press is divided into multiple ink key zones; Select any ink key partition and extract the actual color difference of all color blocks in the selected ink key partition and the actual dot gain value of each color channel at multiple specified tones; In the selected ink key partition, the actual color difference of each color block is compared with the preset color difference threshold under the corresponding color channel. If the actual color difference of at least one item exceeds the preset color difference threshold, the ink key opening parameter of the selected ink key partition is adjusted until the actual color difference obtained after adjustment does not exceed the corresponding preset color difference threshold. If none of them exceed the preset color difference threshold, the ink key opening parameter of the selected ink key partition in the current state is maintained. In the selected inking key partition, the average dot gain of each color channel in the corresponding inking key partition is calculated based on the actual dot gain value of each color channel at all specified tones. The calculated average dot gain of each color channel is compared with the preset dot gain target range for the corresponding color channel. If the average dot gain of at least one color channel exceeds the corresponding preset dot gain target range, the ink-water balance parameters or printing pressure of the selected inking key partition are adjusted until the adjusted average dot gain does not exceed the corresponding preset dot gain target range. If neither exceeds the preset dot gain target range, the ink-water balance parameters and printing pressure of the selected inking key partition are maintained in the current state. Iterate through each ink key partition, adjust the printing control variables of each ink key partition in the same way, and obtain the target printing variable based on the adjusted printing control variables.

[0019] Optionally, real-time monitoring of the printing characteristic data of the printed sample includes: During the printing process of the animation file to be printed, a spectrophotometer or scanning colorimeter is used to continuously or automatically scan the control strips on the printed sample at preset number of sheets to obtain scanning data. Extract the chromaticity value and dot area ratio of each color block from the scanned data. Calculate the corresponding actual color difference using the chromaticity value of each color block, and calculate the actual dot gain value of each color channel in each tone segment using the dot area ratio of each color block. The control strip on the printed sample includes at least the following color blocks: CMYK four-color solid blocks, specified tone blocks, gray balance blocks, overprinting blocks, and spot color blocks.

[0020] Furthermore, the present invention also provides a 300-line anime print color management system, applied to the aforementioned 300-line anime print color management method, the system comprising: The model building module is used to create 300-line standard color samples and anime test images respectively, and to build a difference model based on the 300-line standard color samples and the anime test images; The curve fitting module is used to generate a segmented printing plate compensation curve that is adapted to the characteristics of 300-line halftone dots based on the difference model. The printing plate compensation module is used to perform pre-press preprocessing on the animation file to be printed, and to perform curve compensation and proofing calibration on the pre-pressed animation file based on the segmented printing plate compensation curve to generate a CTP printing plate. The variable adjustment module is used to create a printing sample of the animation file to be printed using the CTP printing plate, and to monitor the printing characteristic data of the printing sample in real time. The printing control variables are automatically adjusted using the printing characteristic data to obtain the target printing variables. The template solidification module is used to generate a production template file for printing the animation file to be printed, based on the difference model, the segmented printing plate compensation curve, and the target printing variable, and to complete color management.

[0021] Furthermore, the present invention also provides a 300-line anime print color management device, including a processor, a memory, and a computer program stored in the memory and executable on the processor. When the computer program is executed, it implements the method steps in the aforementioned 300-line anime print color management method.

[0022] In addition, the present invention also provides a computer storage medium comprising: at least one instruction that, when executed by a computer, implements the method steps of the aforementioned 300-line animation printing color management method.

[0023] The beneficial effects of this invention are as follows: First, a 300-line standard color sample and an animation test image are created. The 300-line standard color sample contains standard color blocks that conform to the printing characteristics of 300 LPI, providing a precise color measurement benchmark. The animation test image specifically covers typical areas where problems are most likely to occur in animation printing, such as skin tones, gradients, and fine lines. It can accurately extract the actual output characteristics of ultra-fine dots at different tones. The difference model built on this basis can accurately quantify the deviation between the actual output and the standard design requirements, providing a precise basis for subsequent compensation. Subsequently, based on this difference model, a printing plate compensation curve (i.e., a segmented printing plate compensation curve) is generated that adapts to both the characteristics of 300-line dots and different tonal ranges. Using this segmented printing plate compensation curve for curve compensation and proofing calibration can specifically solve the problems of 300-line dot characteristics. This solution addresses the issues of loss, enlargement, and distortion of extremely fine LPI dots, overcoming the shortcomings of traditional general color management systems that lack specific compensation for such dots. It effectively restores highlight details, avoids shadow banding, and allows for more natural and accurate color representation in key areas of anime printing, such as skin tone gradations and light and shadow transitions. Finally, it automatically adjusts printing parameters through real-time monitoring of the printing process and solidifies the difference model, compensation curve, and adjusted target printing variables into a standardized production template. This template is suitable for the small-batch, multi-batch, and multi-machine production characteristics of anime printing, effectively ensuring color and dot consistency across different batches and machines, and improving product quality stability. Furthermore, the entire solution establishes a dedicated color control parameter system for 300LPI anime printing, filling the gaps in existing general standards and supporting large-scale, precise color management. Attached Figure Description

[0024] The features and advantages of the invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the invention in any way. In the drawings: Figure 1 A flowchart of a color management method for 300-line animation printed materials according to Embodiment 1 of the present invention is shown; Figure 2 A schematic diagram of the dot gain rate model in Embodiment 1 of the present invention is shown; Figure 3 This diagram illustrates the operation interface for selecting the color guide table in Embodiment 1 of the present invention. Figure 4A and Figure 4B All of these figures show schematic diagrams of the operation interface for selecting the measuring instrument in Embodiment 1 of the present invention; Figure 5A schematic diagram of the operation interface for scanning printed samples in Embodiment 1 of the present invention is shown; Figure 6 A schematic diagram of the user interface for the data report generated in Embodiment 1 of the present invention is shown; Figure 7 The diagram shows a structural diagram of a 300-line animation printing color management system according to Embodiment 2 of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In this embodiment of the invention, the term "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] In this embodiment of the invention, the term "multiple" refers to two or more, and other quantifiers are similar.

[0029] Example 1 This embodiment provides a color management method for 300-line animation printed materials, such as... Figure 1 As shown, the method includes: S1: Create a 300-line standard color sample and an animation test image respectively, and construct a difference model based on the 300-line standard color sample and the animation test image; S2: Based on the difference model, generate a segmented printing plate compensation curve that is compatible with the characteristics of 300-line halftone dots; S3: Perform pre-press processing on the animation file to be printed, and perform curve compensation and proofing calibration on the pre-pressed animation file based on the segmented printing plate compensation curve to generate a CTP printing plate. S4: Use the CTP printing plate to make a printing sample of the animation file to be printed, and monitor the printing characteristic data of the printing sample in real time. Use the printing characteristic data to automatically adjust the printing control variables to obtain the target printing variables. S5: Based on the difference model, the segmented printing plate compensation curve, and the target printing variable, generate a production template file for printing the animation file to be printed, and complete color management.

[0030] In this embodiment, a 300-line standard color sample and an animation test image are first created. The 300-line standard color sample contains standard color blocks that conform to the printing characteristics of 300 LPI, providing a precise color measurement benchmark. The animation test image specifically covers typical areas where problems are most likely to occur in animation printing, such as skin tones, gradients, and fine lines. It can accurately extract the actual output characteristics of ultra-fine dots at different tones. The difference model built on this basis can accurately quantify the deviation between the actual output and the standard design requirements, providing a precise basis for subsequent compensation. Subsequently, based on this difference model, a printing plate compensation curve (i.e., a segmented printing plate compensation curve) is generated that adapts to both the characteristics of 300-line dots and different tonal ranges. Using this segmented printing plate compensation curve for curve compensation and proofing calibration can specifically solve the problems of 300L... The solution addresses the issues of loss, enlargement, and distortion of extremely fine PI dots, overcoming the shortcomings of traditional general color management systems that lack specific compensation for such dots. It effectively restores highlight details, avoids shadow banding, and allows for more natural and accurate color representation in key areas of anime printing, such as skin tone gradations and light and shadow transitions. Finally, real-time monitoring of the printing process automatically adjusts printing parameters, and the difference model, compensation curve, and adjusted target printing variables are solidified into standardized production templates. This adapts to the characteristics of small-batch, multi-batch, and multi-machine production in anime printing, effectively ensuring color and dot consistency across different batches and machines, improving product quality stability. Furthermore, the entire solution establishes a dedicated color control parameter system for 300LPI anime printing, filling the gaps in existing general standards and supporting large-scale, precise color management.

[0031] The following is a detailed description of each step of the 300-line anime print color management method of this embodiment.

[0032] In step S1 of this embodiment, the 300-line standard color sample is specifically an array of color blocks containing CMYK and Lab values, and the acquired color feature data includes at least the solid color value, overprint color value and gray balance value of each color block.

[0033] CMYK values ​​refer to the dot percentages of the four colors: C (cyan), M (magenta), Y (yellow), and K (black), while Lab values ​​are color space data based on human visual perception. The two correspond one-to-one, providing a unified and accurate comparison benchmark for subsequent color difference calculations. Based on this 300-line standard color sample, color feature data conforming to the characteristics of 300 LPI printing processes can be collected, including the solid chromaticity value, overprint chromaticity value, and gray balance value of each color block. This ensures that the measurement benchmark for subsequent model construction matches actual printing conditions, avoiding deviations caused by the mismatch between general standard color blocks and the characteristics of 300-line printing.

[0034] In step S1, the 300-line standard color sample can be made using CTP direct plate making technology. It can be printed and output under the same paper, ink, and printing equipment conditions as the subsequent formal production, ensuring that the collected color feature data completely matches the actual production process parameters and that there is no problem of the benchmark parameters being out of sync with the actual production.

[0035] In step S1 of this embodiment, the designated area in the animation test image includes flat color block area, gradient transition area, fine line area and skin and hair color area of ​​animation character, and the obtained halftone feature data includes at least the halftone area ratio of each designated area in different tonal ranges.

[0036] The anime test pattern is specifically designed with gradient blocks, skin tones, fine line blocks, and halftone blocks of different transparency and size. It can cover areas in anime works that typically require high halftone precision, such as highlights and light skin tones, shadow overlays, and hair lines. By creating the above anime test pattern, the actual output characteristics of 300-line ultra-fine halftone dots in different tonal ranges of high key, mid key, and low key can be accurately captured, which is more in line with the actual needs of anime printing.

[0037] Among the above dot feature data, dot area ratio refers to the proportion of the area actually covered by printing ink within a unit area of ​​the printed matter. It is a core parameter reflecting the output state of 300-line ultra-fine dots. It can intuitively show whether the dots have been lost, enlarged or deformed during the plate-making and printing process, and can provide accurate basic data support for subsequent calculation of dot gain value and adjustment of printing parameters.

[0038] In step S1, the production of the animation test image can be carried out using the same plate-making and printing process conditions as the 300-line standard color sample, ensuring that the collected dot feature data is consistent with the actual production conditions, avoiding feature extraction deviations caused by differences in process conditions, and ensuring the accuracy of the difference model construction.

[0039] Preferably, in step S1, a difference model is constructed based on the 300-line standard color sample and the animation test image, including: S11: Using a spectrophotometer, under a preset measurement environment, collect the color feature data of the color blocks in the 300-line standard color sample; S12: Use a dot matrix meter to obtain the dot matrix feature data of a specified area in the animation test image; S13: Pre-obtain the standard design value of the difference model, and construct the difference matrix based on the standard design value, the color feature data, and the dot feature data; S14: Iteratively optimize the difference matrix until the difference matrix meets the preset conditions to obtain the difference model.

[0040] After creating the 300-line standard color sample and animation test image, the color characteristic data of each color block is first collected using a spectrophotometer and then compared with the preset standard design colorimetric value to calculate the color deviation of different colors in different tones. Subsequently, a dot meter is used to measure a specified area of ​​the animation test image to extract the dot deviation between the actual output characteristics of the extremely fine dots in different tones and the design requirements. All color deviations and dot deviations are integrated into an initial difference matrix, and the matrix parameters are optimized through iterative calculation to continuously correct the error in deviation calculation until the overall deviation range meets the preset accuracy requirements, finally obtaining the difference model adapted for 300-line animation printing.

[0041] By constructing the difference model through the above steps, the deviation between the actual printed output and the design standard can be accurately quantified. It includes deviation information at the overall color level as well as characteristic deviation information at the level of extremely fine dots, providing accurate data support for subsequent plate compensation. This avoids the problem that traditional general color management relies solely on general color blocks to calculate deviations and cannot adapt to the output characteristics of 300-line extremely fine dots.

[0042] Specifically, in step S11, the preset measurement environment typically refers to a standard light source environment, i.e., a standard color viewing environment with a color temperature of D50 and a viewing angle of 2°, to ensure that the measurement error meets the high precision requirements of the printing industry. Before measurement, the spectrophotometer (specifically the EXACT spectrophotometer) needs to be calibrated to ensure that the measured color feature data is accurate and reliable, and to avoid the impact of measurement environment and equipment errors on the accuracy of the difference model.

[0043] Solid color values ​​are obtained by measuring the solid density and color of a single color block. Overprint color values ​​are obtained by measuring the color of different color plates after overprinting. Gray balance values ​​are obtained by measuring the color of gray blocks under different tones. All measurement data are organized and archived according to tone and color value, and uniformly mapped to the preset standard design value, providing an accurate basis for difference calculation.

[0044] Specifically, in step S12, the dot measuring instrument has a higher measurement resolution, which can accurately identify the size, shape and area changes of a single ultra-fine dot in 300-line printing, accurately obtain the actual dot area ratio of different specified areas in high tone, mid tone and low tone, avoid the defect of traditional low-precision measuring equipment that cannot capture the tiny changes of ultra-fine dots, and ensure the extraction accuracy of dot feature data.

[0045] Furthermore, the dot feature data can also include the highlight loss rate, shadow merging degree, line jaggedness, and tone deviation in gradient transition areas and the uniformity of flat color blocks in each specified area at different tonal levels.

[0046] By collecting the aforementioned dot feature data, the deviation characteristics can be further refined, especially for the unique issues of highlight dot loss and shadow dot adhesion in 300-line ultra-fine dots, as well as the special requirements for gradient smoothness and line clarity in animation printing. This allows the difference model to more comprehensively cover various quality issues in 300-line animation printing, providing a more accurate basis for subsequent compensation.

[0047] Specifically, in step S13, the standard design values ​​can be determined based on ISO 12647-2 and GMI ISO12647-2 2015 to determine the standard design values ​​for model input: Color characteristic standard values: Solid Lab (C55 / -37 / -50, M48 / 74 / -3, Y85 / -5 / 93, K16 / 0 / 0), Overprint Lab (R47 / 68 / 48, G50 / -65 / 27, B24 / 22 / -46), Gray balance CMY ratio (25%:25 / 19 / 19, 50%:50 / 40 / 40, 75%:75 / 64 / 64); Standard values ​​for dot characteristics: dot area ratio at 25% tone: 37±3%; dot area ratio at 50% tone: 67±4%; dot area ratio at 75% tone: 88±3%. The standard values ​​for halftone features also include the standard values ​​for animation areas: flat coloring without halftone jumps, gradients without breaks, lines without jagged edges, and skin tone ΔE2000 < 1.0.

[0048] In practical color management, the standard design values ​​also include the following.

[0049] Spot color standard: Testing instrument: EXACT spectrophotometer; Testing light source: D50 2° angle; Color difference formula: △E2000; Scoring standard: △E<1.0; Four-color standard: Testing instrument: I 1PRO; Four-color standard (offset printing): GMI ISO11647-2 2015; Scoring standard: 90 points or above with 2 gray balances meeting the standard; Paper standard: LAB value: 92 / 0 / 0.

[0050] Further, step S13 includes: S131: Using the color feature data and the color feature standard value in the standard design value, calculate the color feature difference of each standard color block; S132: Using the network point feature data and the network point feature standard value in the standard design value, calculate the network point feature difference for each specified area; S133: Fuse all color feature differences and all dot feature differences to obtain the difference matrix.

[0051] The difference matrix constructed using the above method can simultaneously cover deviation information in both color and dot dimensions. Compared with the traditional model that only includes color deviation, it is more suitable for the characteristics of the output effect of extremely fine dots in 300-line animation printing. It can more accurately reflect the real deviation between the actual printing output and the design requirements, and provide a more comprehensive basis for subsequent compensation.

[0052] Specifically, in step S131, the color feature difference is the color difference. The color difference formula adopts the ΔE2000 color difference formula, which has higher calculation accuracy, is closer to the human eye's perception of color differences, and can make the deviation calculation results more in line with the visual evaluation requirements of actual printing.

[0053] After step S11 collects the solid chromaticity value, overprint chromaticity value, and gray balance value for each color block, the solid color difference, overprint color difference, and gray balance color difference are calculated using the ΔE2000 color difference formula. These are collectively referred to as color differences. The solid color difference is calculated by measuring the difference between the actual measured solid chromaticity value and the corresponding standard design value. The overprint color difference is the difference between the actual overprint chromaticity and the standard overprint design value. The gray balance color difference is calculated similarly. These color difference data are directly used as the basic parameters of the difference matrix, more intuitively reflecting the degree of deviation between the actual output and the design standard.

[0054] Specifically, in step S132, after step S12 collects the dot area ratio of each specified area in each tone band, the collected dot area ratio is directly compared with the corresponding dot feature standard value to calculate the dot feature difference (i.e., dot gain rate) for each tone band. Dot gain rate refers to the difference between the actual printed dot area ratio and the dot area ratio required by the design, such as... Figure 2 As shown, this is a core indicator for evaluating dot output status in the printing process. For 300-line ultra-fine dots, even a tiny deviation in dot gain can lead to loss of highlight details and uneven skin tone gradation. Therefore, accurately calculating the dot gain of each tone band allows the difference model to accurately capture the deformation characteristics of ultra-fine dots.

[0055] Specifically, in step S133, the color difference and dot gain calculated in the aforementioned steps are directly integrated into the difference matrix as the core basis for subsequent segmented compensation.

[0056] Specifically, in step S14, the preset condition is as follows: all color differences in the difference matrix are less than or equal to the first preset threshold, and the absolute value of the deviation of all dot feature differences (specifically, dot gain rate) in the difference matrix is ​​less than or equal to the second preset threshold.

[0057] During the iterative optimization of the difference matrix, using the above-mentioned preset conditions as the termination condition ensures that the final difference model is accurate enough, and the deviations in all dimensions are controlled within an acceptable range. This prevents the subsequent compensation effect from being affected by large residual deviations, thus ensuring the accuracy of subsequent color and dot adjustments.

[0058] It should be understood that the above-mentioned dot feature difference refers to the dot expansion rate, and its deviation refers to the dot expansion deviation. Therefore, the absolute value of the deviation of all dot feature differences in the difference matrix is ​​less than or equal to the second preset threshold, which means that the absolute value of the dot expansion deviation in the difference matrix is ​​less than or equal to the second preset threshold.

[0059] The first and second preset thresholds mentioned above can be preset and adjusted according to actual conditions. In this embodiment, the first preset threshold can be set to color difference ΔE2000≤1.0, and the second preset threshold can be set to the absolute value of dot gain deviation≤1.5%, which can fully meet the high standard requirements of animation printing for color and dot accuracy.

[0060] Furthermore, in step S14, the iterative optimization of the difference matrix can be performed by adjusting the weights of each deviation term in the difference matrix using the least squares method, continuously reducing the calculation error between the actual measured data and the standard design value. After each iteration, the difference of each dimension is re-verified to ensure that the preset conditions are met. The iteration is terminated when all differences meet the requirements, and finally a difference model that can accurately reflect the actual deviation law of 300-line animation printing is obtained.

[0061] Preferably, step S2 in this embodiment includes: S21: Based on the dot feature data in the difference model, the dot area ratio from 0% to 100% is divided into 0% to 20% highlight drop segment, 20% to 80% midtone segment and 80% to 100% shadow segment, and the mapping relationship between the input dot feature and the output dot feature of each tone segment in the difference model is extracted respectively. S22: Calculate the inverse function of the mapping relationship for each tone segment, and perform compensation operation on each inverse function according to the preset compensation conditions to obtain the segmented printing plate compensation curve corresponding to each tone segment.

[0062] In the process of generating segmented printing plate compensation curves based on the difference model, the mapping relationship between the input and output of halftone dots in different tonal segments is first extracted using the difference model. Based on the deviation characteristics of 300-line ultra-fine dots in different tonal segments, tonal intervals are divided. Addressing the issues of easy loss of ultra-fine dots in the highlight segment (or simply high-tone), easy dot enlargement in the mid-tone segment (or simply mid-tone), and easy dot aggregation and merging in the shadow segment (or simply shadow), the inverse function of the mapping relationship for each tonal segment is calculated. Then, combined with the dot deviation value of each tonal segment, targeted compensation calculations are performed, ultimately yielding the segmented printing plate compensation curve for each tonal segment. This method of compensating for each tonal segment separately can specifically solve the different deformation problems of ultra-fine dots in different tonal segments. Compared to the traditional single overall compensation curve, it has higher compensation accuracy and can better match the dot output requirements of 300-line animation printing.

[0063] The segmented plate compensation curves generated in this way can be directly imported into the CTP plate-making system in practical applications. During the plate-making process, the dot area ratio of the printing plate will be adjusted according to the corresponding tone compensation curve. The dot input area in the highlight section will be appropriately increased to compensate for dot loss, and the dot input area in the shadow section will be appropriately reduced to avoid dot adhesion. The output deviation of the 300-line ultra-fine dots will be corrected in advance from the plate-making stage, ensuring the dot output accuracy from the source and laying a good foundation for obtaining products that meet the requirements in subsequent printing.

[0064] Specifically, in S21, since the difference model is based on dot feature data and its corresponding dot feature differences, it contains both dot feature data and dot feature differences. Furthermore, this difference model has input data and corresponding output data. The input data is the dot area ratio required by the design, and the output data is the actual dot area ratio measured after printing. Based on this mapping relationship, and combined with the output characteristics of 300-line ultra-fine dots in different dot area ranges, it is divided into three independent tonal ranges: highlight, midtone, and shadow. This better adapts to the deviation patterns in different ranges and avoids the deficiency of a single curve being unable to accommodate the deviation characteristics of different ranges.

[0065] In step S22, when calculating the inverse function of the mapping relationship for each tone segment, the nonlinear least squares method can be used to fit the mapping relationship for each tone segment to obtain a continuously differentiable mapping function. Then, the inverse function of the fitted mapping function is obtained. Finally, the average dot deviation of the tone segment is combined with the compensation correction of the input dot area ratio in the inverse function to obtain the segmented printing plate compensation curve for the corresponding tone segment.

[0066] Further, the preset compensation conditions mentioned in step S22 are as follows: under the premise that the color difference is less than or equal to the third preset threshold, the dot gain rate at 25% tone is controlled to be 37±3%, the dot gain rate at 50% tone is controlled to be 67±4%, and the dot gain rate at 75% tone is controlled to be 88±3%.

[0067] During the compensation process for different tonal ranges, for the highlight range, since extremely fine dots are easily lost during plate-making and printing, anti-loss compensation is required. Therefore, the input dot area ratio for the highlight range is appropriately increased during compensation, making the actual output dot area ratio closer to the design standard. This can offset the dot loss during plate-making and printing, avoid large-area dot loss in highlight areas, and ensure the integrity of details in highlight areas such as light color gradients and light skin in animation. For the midtone range, extremely fine dots are more prone to over-expansion, requiring color stability compensation. Therefore, during compensation, the input dot area ratio is appropriately reduced based on the average dot gain rate of this tonal range to avoid the actual output dots being too large, resulting in a dull image, and ensuring clear and transparent midtone layers in animation. For dark tones, extremely fine dots are prone to sticking and merging, requiring anti-merging compensation. Therefore, during compensation, the input dot area ratio of dark tones will be appropriately reduced to reduce sticking problems caused by dot compression during printing, preserve the detail levels of dark areas, avoid large areas of dark areas from becoming blurred, and ensure the clarity of the outline and the integrity of details in the dark areas of the animation image.

[0068] The aforementioned third preset threshold can be preset and adjusted according to actual conditions. It can be the same as or different from the aforementioned first preset threshold. This embodiment does not limit it.

[0069] Preferably, in step S3 of this embodiment, the pre-printing preprocessing of the animation file to be printed includes: S31: Perform RGB to CMYK conversion and 300-line color separation processing on the animation file to be printed in sequence.

[0070] Through the above pre-press processing, the file format can be adapted to the printing output requirements, the original design's RGB color gamut can be converted to the printing-compatible CMYK color gamut, and color separation can be completed according to the 300-line printing process, providing a file that meets the basic process requirements for subsequent dot compensation processing.

[0071] Furthermore, pre-press preprocessing may also include: S32: Identify the content areas in the animation file to be printed, distinguish between flat areas, gradient areas, line areas, skin areas and ordinary graphic areas, and mark the skin areas separately.

[0072] Since the visual quality of skin tones in anime printing has the greatest impact on the overall effect of the work, and is also the area most prone to visual problems due to halftone deviation, marking the skin tones separately allows for additional precision optimization of this area in subsequent compensation stages, further enhancing the visual effect of the final output.

[0073] After pre-press processing is completed, curve compensation is performed on the pre-pressed animation file to be printed based on the segmented printing plate compensation curve, including: S33: Call the segmented printing plate compensation curve to perform segmented compensation on the dot area ratio of each content area in the animation file to be printed.

[0074] After the above pre-press processing and curve compensation, the output plate-making file has completed targeted dot and color compensation. It can be directly imported into CTP plate-making to output the printing plate with the corresponding accuracy requirements. Subsequent printing will result in 300-line anime prints with accurate colors and clear dots.

[0075] In step S33, the compensation accuracy can be doubled for the marked skin-colored areas to ensure that the dot deviation of the skin-colored areas is controlled within the required range.

[0076] To further ensure accurate color and clear dot coverage in 300-line anime prints, further proofing and calibration are required to verify whether the compensated dots and colors meet the standard requirements, ensuring that the generated CTP printing plate can meet the precision requirements of 300-line anime printing.

[0077] Preferably, in step S3 of this embodiment, the preprocessed animation file to be printed is subjected to proofing calibration, including: S34: The segmented printing plate compensation curve after curve compensation is applied in the CTP plate-making machine; S35: According to the specified printing conditions, a proof sheet is produced using the CTP printing press loaded with the segmented printing plate compensation curve after curve compensation. S36: Obtain the color difference of all color blocks in the proof sample and the halftone feature difference at the specified tone; S37: Based on the color difference of all color blocks and the dot feature difference at the specified tonal range, determine whether the proofing calibration of the pre-processed animation file to be printed is qualified; if yes, complete the proofing calibration and output the CTP printing plate in the current state; otherwise, adjust the segmented printing plate compensation curve and reuse the adjusted segmented printing plate compensation curve to perform curve compensation and proofing calibration on the pre-processed animation file to be printed until the proofing calibration is qualified and output the corresponding CTP printing plate.

[0078] During the proofing and calibration process, a proof sample is first created by loading the compensated segmented printing plate compensation curve onto the CTP plate-making machine. Then, the color and dot data of the sample are tested one by one. The actual output test results are used to determine whether the current compensation curve meets the accuracy requirements. If it does not meet the requirements, the compensation curve parameters are directly adjusted and a new proof is made for verification, forming a closed-loop calibration process. This process can identify deviation problems in advance before the formal mass printing, avoid unqualified products during mass production, reduce production losses, and ensure that the final output CTP printing plate is fully adapted to the process characteristics of the current production equipment, ensuring that the color and dot accuracy of the final printed product meet the high standard requirements of 300-line animation printing.

[0079] Specifically, in step S35, specifying printing conditions refers to the same conditions as the actual printing conditions, such as paper, ink, printing pressure, and roller speed. This allows the output effect of the proof to be as close as possible to the actual effect of mass production, avoiding verification deviations caused by excessive differences between the proof conditions and the actual production conditions. This makes the proof calibration results more reliable and further ensures the accuracy of the finished product in mass production.

[0080] Specifically, in step S36, the difference between color blocks and the difference between halftone features in the proof sample can be obtained by scanning the standard control strip on the proof sample. By reading the chromaticity value of each color block and comparing it with the standard value, the actual color difference is obtained. At the same time, the halftone area ratio of each specified tone is used to calculate the actual halftone enlargement deviation, ensuring the accuracy of all test data and providing an accurate basis for subsequent qualification judgment.

[0081] Specifically, in step S37, based on the color difference of all color blocks and the dot feature difference at a specified tone, it is determined whether the proofing calibration of the preprocessed animation file to be printed is qualified, including: When the color difference of all color blocks is less than or equal to the fourth preset threshold and the dot feature difference at the specified tone is less than or equal to the fifth preset threshold, the proofing calibration is deemed qualified; otherwise, the proofing calibration is deemed unqualified.

[0082] Through the above proofing and calibration, the precision threshold of the final plate-making file can be strictly controlled. Only when the dual requirements of color and dot deviation are met can the product enter the mass printing stage, effectively preventing unqualified products from flowing into the next process. This ensures the final quality of 300-line animation prints from the pre-press stage.

[0083] The fourth and fifth preset thresholds can be preset according to the actual situation. The fourth preset threshold can be the same as or different from the first preset threshold, and the fifth preset threshold can be the same as or different from the second preset threshold, depending on the specific situation.

[0084] Once the proofing and calibration are successful, a CTP printing plate in its current state is generated for the subsequent formal printing of the animation files to be printed.

[0085] Specifically, before the official printing of the animation files, preparatory work such as incoming material inspection and equipment inspection is required. Incoming material inspection includes inspecting the ink, paper, blanket, backing paper, alcohol, fountain liquid, and board materials separately. For example, the hardness of a blanket measuring 1050mm x 840mm x 1.95mm is tested. Equipment inspection includes inspecting the ink supply system, water supply system, dampening solution, and other equipment. The inspection items and standard requirements are shown in Table 1.

[0086] Table 1. Inspection Items and Standard Requirements for Equipment Inspection Before Testing In step S4, printing feature data refers to the data that the printing equipment can reflect in the current production environment, reflecting the actual printing color and dot output characteristics. These data will fluctuate slightly with the changes in the state of the printing equipment, ink and paper batches, and temperature and humidity of the production environment. Therefore, they need to be re-measured and obtained before formal printing to ensure the accuracy of color correction and adapt to the actual production conditions of the current batch.

[0087] Specifically, the printing feature data includes the actual color difference of each color patch in the printed sample and the actual dot gain value of each color channel in each tone segment.

[0088] By monitoring the aforementioned printing characteristic data in real time, changes in color and dot deviations during the printing process can be promptly identified. This prevents batch products from exceeding accuracy standards due to factors such as equipment instability and fluctuations in incoming materials. Real-time data support is provided for quality control throughout the printing process, ensuring that every finished product consistently meets the accuracy requirements of 300-line animation printing. Simultaneously, recording the actual characteristic data from each printing process accumulates data for subsequent iterations and updates to the difference model, continuously optimizing the accuracy of the compensation curve, constantly adapting to changes in production equipment status, and maintaining the long-term stability of the production quality of 300-line animation prints.

[0089] Preferably, in step S4 of this embodiment, real-time monitoring of the printing feature data of the printed sample includes: S41: During the printing process of the animation file to be printed, a spectrophotometer or scanning colorimeter is used to continuously or automatically scan the control strips on the printed sample at preset number of sheets to obtain scanning data. S42: Extract the chromaticity value and dot area ratio of each color block from the scanned data, calculate the corresponding actual color difference using the chromaticity value of each color block, and calculate the actual dot gain value of each color channel in each tone segment using the dot area ratio of each color block. The control strip on the printed sample includes at least the following color blocks: CMYK four-color solid blocks, specified tone blocks, gray balance blocks, overprinting blocks, and spot color blocks.

[0090] By implementing the above steps to achieve real-time monitoring of printing feature data, the system can automatically acquire actual data during the current printing process, avoiding errors and delays caused by manual inspection. It can promptly capture minute deviations in the production process, facilitating quick adjustments by operators. This ensures product quality stability, reduces the generation of defective products, and lowers losses in mass production. Furthermore, setting a pre-set interval for inspection balances inspection accuracy with avoiding slowing down printing production efficiency due to continuous inspection, adapting to the production rhythm of large-scale batch printing. In actual production, the pre-set interval can be flexibly adjusted according to product accuracy requirements, printing press speed, and inspection equipment performance. For high-end animation prints with extremely high accuracy requirements, the inspection interval can be appropriately reduced to further enhance quality control.

[0091] It should be understood that the color blocks on the printed sample are the same as those on the aforementioned proofing sample. The selection of common color blocks, including solid CMYK four-color blocks, specified tonal blocks, gray balance blocks, overprinting blocks, and spot color blocks, can comprehensively cover various color and dot deviation scenarios in the printing process. This ensures that the test data can fully reflect the actual output status of the current printing process and will not miss any deviation issues that may affect the final image quality, thus providing comprehensive and accurate data support for subsequent adjustments.

[0092] Specifically, before step S41, the method also includes selecting a color guide table consistent with the proof sample (its operation interface is shown in Figure 1). Figure 3 (As shown), select the measuring instrument (its operation interface is as shown). Figure 4A and Figure 4B The steps (as shown) ensure that the testing equipment and standards are consistent with those in the pre-press proofing calibration stage, avoiding data analysis deviations caused by inconsistent testing standards, making the testing data at different stages comparable, and more accurately reflecting the deviation changes from proofing to formal production, thereby further improving the accuracy of data monitoring.

[0093] In step S41, the printed sample is scanned, and the scoring criteria are selected in conjunction with the guide rail scanner to check the ink depth of the CMYK four-color ink keys (the operation interface is as follows). Figure 5 (As shown).

[0094] In step S41, after obtaining the scan data, the following steps are also included: Color cyclic matching and outlier removal of scanned data.

[0095] The above processing filters out abnormal detection data caused by paper wrinkles, ink smudges, scanning noise, etc., preventing erroneous data from affecting subsequent deviation judgments and making the detection results more consistent with the actual printing state, thus ensuring the accuracy of subsequent color adjustments. Furthermore, performing color cycle matching on the scanned data can align with the color fluctuation benchmark of the current batch of printing, further improving the accuracy of data extraction.

[0096] After extracting data in step S42, the system can automatically calculate the average dot gain deviation and average color difference value of the whole under the current printing state, and automatically synchronize the calculation results to the control system of the printing equipment. This allows operators to quickly complete the corresponding adjustments based on the numerical prompts without manual calculation, which improves adjustment efficiency and avoids errors caused by manual calculation, making the adjustment of the entire production process more accurate and timely.

[0097] In step S4, printing control variables refer to the adjustable parameters of the equipment and processes that affect the printing dot and color output characteristics. Adjusting these parameters will directly change the dot gain and color rendering effect in the actual printing process, and are the main adjustment objects for the final color correction.

[0098] Preferably, in step S4, the printing control variables are automatically adjusted using the printing feature data to obtain the target printing variables, including: S43: Divide the ink zone of the printing press into multiple ink key zones; S44: Select any ink key partition and extract the actual color difference of all color blocks in the selected ink key partition and the actual dot gain value of each color channel at multiple specified tones; S45: In the selected ink key partition, the actual color difference of each color block is compared with the preset color difference threshold under the corresponding color channel. If the actual color difference of at least one item exceeds the preset color difference threshold, the ink key opening parameter of the selected ink key partition is adjusted until the actual color difference obtained after adjustment does not exceed the corresponding preset color difference threshold. If none of them exceed the preset color difference threshold, the ink key opening parameter of the selected ink key partition in the current state is maintained. S46: In the selected inking key partition, calculate the average dot gain of each color channel in the corresponding inking key partition based on the actual dot gain value of each color channel at all specified tones. Compare the calculated average dot gain of each color channel with the preset dot gain target range for the corresponding color channel. If the average dot gain of at least one color channel exceeds the corresponding preset dot gain target range, adjust the ink-water balance parameter or printing pressure of the selected inking key partition until the adjusted average dot gain does not exceed the corresponding preset dot gain target range. If neither exceeds the preset dot gain target range, maintain the ink-water balance parameter and printing pressure of the selected inking key partition in the current state. S47: Traverse each ink key partition, adjust the printing control variables of each ink key partition in the same way, and obtain the target printing variable based on the adjusted printing control variables.

[0099] After monitoring printing feature data, the printing press is automatically adjusted based on this data. First, the entire press is divided into multiple independent ink key zones. Then, color difference correction and dot gain correction are performed zone by zone. On one hand, the overall color deviation is addressed by adjusting the ink key opening; on the other hand, dot gain deviation is addressed by adjusting the ink-water balance or printing pressure. This layered adjustment avoids interference between different parameter adjustments, ensuring precise correction of each deviation. Ultimately, the target printing variables are obtained, adapting to the current production conditions. This guarantees that the color and dot accuracy of all zones consistently meet the requirements of 300-line animation printing during subsequent batch printing. By adjusting each zone individually, the independent deviations in different ink zones can be addressed specifically, avoiding excessive deviations in some areas due to a single overall adjustment, further improving the color uniformity and accuracy stability of the entire printed product.

[0100] Specifically, in step S43, the ink key partitions can be divided according to the physical partitions of the original ink keys on the printing press. Each ink key corresponds to an independent adjustment partition, without the need for additional re-division of areas. This allows for direct adaptation to the existing hardware structure of the printing equipment, achieving precise partition adjustment without requiring equipment modifications. This reduces the hardware modification costs for implementing the method and is compatible with the production scenarios of most conventional printing equipment. Furthermore, by adjusting according to the original ink key partitions, the adjusted parameters can be directly mapped to the existing control unit of the equipment. The control system can directly read and execute the adjustment commands without additional parameter conversion, improving the efficiency and accuracy of the adjustment execution.

[0101] In steps S45 and S46, the printing control variables include the ink bond opening parameter of the ink zone of the printing press, the ink-water balance parameter, and the printing pressure.

[0102] By adjusting the aforementioned printing control variables, the dot gain and overall color output during the actual printing process can be directly altered. Based on the currently acquired printing characteristic data deviations, targeted adjustments to the corresponding parameters can correct the actual output color and dot gain back to the standard range, achieving dynamic and precise color control. When an overall color cast is detected in a corresponding ink area, and the deviation exceeds the allowable range, the ink key opening of the corresponding ink area is directly adjusted to increase or decrease the ink supply to that area, quickly correcting the overall color deviation. When the overall dot gain is detected to be too high, the printing pressure can be appropriately adjusted to reduce the printing intensity and decrease the dot spread. When the overall dot gain is too low, the printing pressure is appropriately increased to ensure sufficient dot transfer area. Simultaneously, combined with adjustments to the ink-water balance parameters, the ink-water balance is maintained to ensure stability, preventing issues such as ink smearing, smearing, or dot loss caused by ink-water imbalance. This ensures that the output of 300-line ultra-fine dots remains stable and meets accuracy requirements throughout the printing process, ultimately resulting in qualified 300-line anime prints with accurate colors and clear details.

[0103] After obtaining the target printing variables through step S4, a corresponding data report can be generated. This report can be used to analyze the color deviation trend in current printing production, helping operators quickly locate the source of the deviation. For example, it can display color differences in the four-color inks, show a high overall dot gain rate in a certain color channel, or an excessive deviation in a specific tonal range, reducing the time cost of manual troubleshooting and improving the efficiency of production adjustments. Simultaneously, all detection data and generated reports are automatically archived, facilitating subsequent traceability of production quality and providing data reference for the production of similar products, further optimizing the production process and continuously stabilizing the production quality of 300-line animation printed materials. The user interface for this data report is as follows: Figure 6 As shown, this report displays the lab values ​​of the four inks, the color difference values ​​of the four inks, the three overprinting colors, and the gray balance, as well as the dot gain values ​​of the CMYK dots. It also provides the optimal density, such as suggesting whether the printing density ink should be increased or decreased. Furthermore, it allows you to check whether the scores of each evaluation item are up to standard and identify which specific item has a problem, so as to make printing adjustments.

[0104] In step S5 of this embodiment, based on the difference model, the segmented printing plate compensation curve, and the target printing variable, a production template file adapted to the animation file to be printed under the current batch production conditions can be generated by solidifying these three. The production template file will be sent to the control system of the printing equipment simultaneously. In the subsequent printing process of the entire batch of 300-line animation prints, the control system will directly and automatically control various outputs according to the parameters in the production template file, without the need for operators to repeatedly make manual adjustments. This not only improves the stability of batch production but also reduces the workload of operators, ensuring that the entire batch of products can maintain uniform color and dot accuracy.

[0105] Example 2 A 300-line anime print color management system is applied to the 300-line anime print color management method in Embodiment 1, such as... Figure 7 As shown, the system includes: The model building module is used to create 300-line standard color samples and anime test images respectively, and to build a difference model based on the 300-line standard color samples and the anime test images; The curve fitting module is used to generate a segmented printing plate compensation curve that is adapted to the characteristics of 300-line halftone dots based on the difference model. The printing plate compensation module is used to perform pre-press preprocessing on the animation file to be printed, and to perform curve compensation and proofing calibration on the pre-pressed animation file based on the segmented printing plate compensation curve to generate a CTP printing plate. The variable adjustment module is used to create a printing sample of the animation file to be printed using the CTP printing plate, and to monitor the printing characteristic data of the printing sample in real time. The printing control variables are automatically adjusted using the printing characteristic data to obtain the target printing variables. The template solidification module is used to generate a production template file for printing the animation file to be printed, based on the difference model, the segmented printing plate compensation curve, and the target printing variable, and to complete color management.

[0106] In this embodiment, a 300-line standard color sample and an animation test image are first created using the model building module. The 300-line standard color sample contains standard color blocks that conform to the printing characteristics of 300 LPI, providing a precise color measurement benchmark. The animation test image specifically covers typical areas where problems are most likely to occur in animation printing, such as skin tones, gradients, and fine lines. It can accurately extract the actual output characteristics of ultra-fine dots at different tones. The difference model built on this basis can accurately quantify the deviation between the actual output and the standard design requirements, providing a precise basis for subsequent compensation. Subsequently, based on this difference model, a plate compensation curve (i.e., a segmented plate compensation curve) is generated through the curve fitting module, which is suitable for both the characteristics of 300-line dots and different tonal ranges. Using this segmented plate compensation curve, curve compensation and proofing calibration are performed through the plate compensation module, which can specifically solve... This solution addresses the issues of loss, enlargement, and distortion of extremely fine dots at 300 LPI, overcoming the shortcomings of traditional general color management systems that lack specific compensation for such dots. It effectively restores highlight details, avoids shadow banding, and allows for more natural and accurate color representation in key areas of anime printing, such as skin tone gradations and light and shadow transitions. Finally, a variable adjustment module automatically adjusts printing parameters through real-time monitoring of the printing process, and a template solidification module solidifies the difference model, compensation curve, and adjusted target printing variables into a standardized production template. This template is suitable for the small-batch, multi-batch, and multi-machine production characteristics of anime printing, effectively ensuring color and dot consistency across different batches and machines, improving product quality stability. Furthermore, the entire solution establishes a dedicated color control parameter system for 300 LPI anime printing, filling the gaps in existing general standards and supporting large-scale, precise color management.

[0107] The functions of each module in the 300-line anime print color management system described in this embodiment are the same as the method steps of the 300-line anime print color management method described in Embodiment 1. Therefore, for details not covered in this embodiment, please refer to Embodiment 1 and... Figures 1 to 6 The specific details will not be repeated here.

[0108] Example 3 This embodiment also provides a 300-line anime print color management device, including a processor, a memory, and a computer program stored in the memory and run on the processor. When the computer program runs, it implements the method steps in the 300-line anime print color management method of Embodiment 1.

[0109] By using a computer program stored in memory and running on a processor, precise color management for 300 LPI animation printing is achieved. It can be implemented without additional hardware modifications and is suitable for the characteristics of small-batch, multi-batch, and multi-machine production in animation printing. It effectively ensures the consistency of color and dot pattern of products produced in different batches and on different machines, improves product quality stability, lowers the technical threshold for 300-line high-precision animation printing, and helps enterprises stably output animation printing products that meet high-quality requirements.

[0110] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the computer device, connecting all parts of the computer device through various interfaces and lines.

[0111] Memory can be used to store computer programs and / or models. The processor performs various functions of the computer device by running or executing the computer programs and / or models stored in the memory, and by accessing data stored in the memory. Memory can primarily include a program storage area and a data storage area. The program storage area can store the operating system and at least one application program required for a function (e.g., sound playback, image playback, etc.); the data storage area can store data created based on the use of the mobile phone (e.g., audio data, video data, etc.). Furthermore, memory can include high-speed random access memory, and can also include non-volatile memory, such as hard disks, RAM, plug-in hard disks, SmartMedia Cards (SMC), Secure Digital (SD) cards, Flash Cards, at least one disk storage device, flash memory device, or other volatile solid-state storage devices.

[0112] It should be understood that each block of a flowchart and / or block diagram, and combinations of blocks in a flowchart and / or block diagram, can be implemented by a computer program. These computer programs can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that instructions executable by the processor of the computer or other programmable data processing device generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0113] These computer programs may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0114] These computer programs may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0115] This embodiment also provides a computer storage medium, which includes at least one instruction that, when executed by a computer, implements the method steps of the 300-line animation printing color management method of Embodiment 1.

[0116] By executing a computer storage medium containing at least one instruction, precise color management for 300 LPI animation printing is achieved. It can be implemented without additional hardware modifications and is suitable for the characteristics of small-batch, multi-batch, and multi-machine production in animation printing. It effectively ensures the consistency of color and dot pattern of products produced in different batches and on different machines, improves product quality stability, lowers the technical threshold for 300-line high-precision animation printing, and helps enterprises stably output animation printing products that meet high-quality requirements.

[0117] Similarly, for details not covered in this embodiment, please refer to Embodiments 1 to 2 and... Figures 1 to 7 The specific details will not be elaborated here.

[0118] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for color management of 300-line animation printed materials, characterized in that, The method includes: Create a 300-line standard color sample and an animation test image respectively, and construct a difference model based on the 300-line standard color sample and the animation test image; Based on the aforementioned difference model, a segmented printing plate compensation curve adapted to the characteristics of 300-line halftone dots is generated. The animation file to be printed is pre-processed, and the pre-processed animation file to be printed is subjected to curve compensation and proofing calibration based on the segmented printing plate compensation curve to generate a CTP printing plate. The CTP printing plate is used to create a printed sample of the animation file to be printed, and the printing characteristic data of the printed sample is monitored in real time. The printing control variables are automatically adjusted using the printing characteristic data to obtain the target printing variables. Based on the difference model, the segmented printing plate compensation curve, and the target printing variable, a production template file is generated for printing the animation file to be printed, and color management is completed.

2. The color management method for 300-line animation printed materials according to claim 1, characterized in that, Based on the 300-line standard color sample and the animation test image, a difference model is constructed, including: A spectrophotometer was used to collect color feature data of color blocks in the 300-line standard color sample under a preset measurement environment; A dot matrix meter is used to acquire dot matrix feature data of a specified area in the animation test image; The standard design values ​​of the difference model are obtained in advance, and a difference matrix is ​​constructed based on the standard design values, the color feature data, and the dot feature data; The difference matrix is ​​iteratively optimized until it meets the preset conditions, thus obtaining the difference model.

3. The color management method for 300-line animation printed materials according to claim 2, characterized in that, The 300-line standard color sample is specifically an array of color blocks containing CMYK and Lab values, and the acquired color feature data includes at least the solid color value, overprint color value, and gray balance value of each color block.

4. The color management method for 300-line animation printed materials according to claim 3, characterized in that, The designated areas in the anime test image include flat color block areas, gradient transition areas, fine line areas, and anime character skin and hair color areas, and the obtained halftone feature data includes at least the halftone area ratio of each designated area in different tonal ranges.

5. The color management method for 300-line animation printed materials according to claim 4, characterized in that, The standard design values ​​include color characteristic standard values ​​and dot characteristic standard values; Based on the standard design values, the color feature data, and the dot feature data, a difference matrix is ​​constructed, including: The color difference of each color patch is calculated using the color feature data and the color feature standard value in the standard design value; Using the network feature data and the network feature standard value in the standard design value, the network feature difference for each specified area is calculated; The difference matrix is ​​obtained by fusing all color differences and all dot feature differences.

6. The color management method for 300-line animation printed materials according to claim 5, characterized in that, The preset conditions specifically include: all color differences in the difference matrix are less than or equal to a first preset threshold, and the absolute value of the deviation of all dot feature differences in the difference matrix is ​​less than or equal to a second preset threshold.

7. The color management method for 300-line animation printed materials according to claim 1, characterized in that, The difference model contains network feature data; Based on the aforementioned difference model, a segmented printing plate compensation curve adapted to the characteristics of a 300-line halftone dot is generated, including: Based on the dot feature data in the difference model, the dot area ratio from 0% to 100% is divided into 0% to 20% highlight segment, 20% to 80% midtone segment and 80% to 100% shadow segment, and the mapping relationship between the input dot features and the output dot features of each tone segment in the difference model is extracted respectively. Calculate the inverse function of the mapping relationship for each tone segment, and perform compensation operation on each inverse function according to the preset compensation conditions to obtain the segmented printing plate compensation curve corresponding to each tone segment.

8. The color management method for 300-line animation printed materials according to claim 7, characterized in that, The preset compensation conditions are as follows: under the premise that the color difference is less than or equal to the third preset threshold, the dot gain rate at 25% tone is controlled at 37±3%, the dot gain rate at 50% tone is controlled at 67±4%, and the dot gain rate at 75% tone is controlled at 88±3%.

9. The color management method for 300-line animation printed materials according to claim 1, characterized in that, Pre-processing of animation files for printing includes: The animation file to be printed is sequentially subjected to RGB to CMYK conversion and 300-line color separation processing.

10. The color management method for 300-line animation printed materials according to claim 1, characterized in that, The pre-processed animation file to be printed is proofed and calibrated, including: The segmented printing plate compensation curve after curve compensation is loaded in the CTP plate-making machine; According to the specified printing conditions, a proof sheet is produced using the CTP printing press with the segmented printing plate compensation curve loaded with curve compensation. Obtain the color difference of all color blocks in the proof sample and the halftone feature difference at a specified tone; Based on the color difference of all color blocks and the dot feature difference at the specified tonal range, determine whether the proofing calibration of the pre-processed animation file to be printed is qualified; if so, complete the proofing calibration and output the CTP printing plate in the current state; otherwise, adjust the segmented printing plate compensation curve and reuse the adjusted segmented printing plate compensation curve to perform curve compensation and proofing calibration on the pre-processed animation file to be printed until the proofing calibration is qualified and output the corresponding CTP printing plate.

11. The color management method for 300-line animation printed materials according to claim 10, characterized in that, Based on the color difference of all color blocks and the dot feature difference at a specified tonal level, determine whether the proofing calibration of the preprocessed animation file to be printed is qualified, including: When the color difference of all color blocks is less than or equal to the fourth preset threshold and the dot feature difference at the specified tone is less than or equal to the fifth preset threshold, the proofing calibration is deemed qualified; otherwise, the proofing calibration is deemed unqualified.

12. The color management method for 300-line animation printed materials according to claim 1, characterized in that, The printing feature data includes the actual color difference of each color block in the printed sample and the actual dot gain value of each color channel in each tone segment; the printing control variables include the ink bond opening parameter of the ink zone of the printing press, the ink-water balance parameter, and the printing pressure. The printing control variables are automatically adjusted using the aforementioned printing feature data to obtain the target printing variables, including: The ink zone of the printing press is divided into multiple ink key zones; Select any ink key partition and extract the actual color difference of all color blocks in the selected ink key partition and the actual dot gain value of each color channel at multiple specified tones; In the selected ink key partition, the actual color difference of each color block is compared with the preset color difference threshold under the corresponding color channel. If the actual color difference of at least one item exceeds the preset color difference threshold, the ink key opening parameter of the selected ink key partition is adjusted until the actual color difference obtained after adjustment does not exceed the corresponding preset color difference threshold. If none of them exceed the preset color difference threshold, the ink key opening parameter of the selected ink key partition in the current state is maintained. In the selected inking key partition, the average dot gain of each color channel in the corresponding inking key partition is calculated based on the actual dot gain value of each color channel at all specified tones. The calculated average dot gain of each color channel is compared with the preset dot gain target range for the corresponding color channel. If the average dot gain of at least one color channel exceeds the corresponding preset dot gain target range, the ink-water balance parameters or printing pressure of the selected inking key partition are adjusted until the adjusted average dot gain does not exceed the corresponding preset dot gain target range. If neither exceeds the preset dot gain target range, the ink-water balance parameters and printing pressure of the selected inking key partition are maintained in the current state. Iterate through each ink key partition, adjust the printing control variables of each ink key partition in the same way, and obtain the target printing variable based on the adjusted printing control variables.

13. The color management method for 300-line animation printed materials according to claim 12, characterized in that, Real-time monitoring of the printing characteristic data of the printed sample, including: During the printing process of the animation file to be printed, a spectrophotometer or scanning colorimeter is used to continuously or automatically scan the control strips on the printed sample at preset number of sheets to obtain scanning data. Extract the chromaticity value and dot area ratio of each color block from the scanned data. Calculate the corresponding actual color difference using the chromaticity value of each color block, and calculate the actual dot gain value of each color channel in each tone segment using the dot area ratio of each color block. The control strip on the printed sample includes at least the following color blocks: CMYK four-color solid blocks, specified tone blocks, gray balance blocks, overprinting blocks, and spot color blocks.

14. A 300-line color management system for printed animation materials, characterized in that, The system, applied in the color management method for 300-line animation printed materials as described in any one of claims 1 to 13, comprises: The model building module is used to create 300-line standard color samples and anime test images respectively, and to build a difference model based on the 300-line standard color samples and the anime test images; The curve fitting module is used to generate a segmented printing plate compensation curve that is adapted to the characteristics of 300-line halftone dots based on the difference model. The printing plate compensation module is used to perform pre-press preprocessing on the animation file to be printed, and to perform curve compensation and proofing calibration on the pre-pressed animation file based on the segmented printing plate compensation curve to generate a CTP printing plate. The variable adjustment module is used to create a printing sample of the animation file to be printed using the CTP printing plate, and to monitor the printing characteristic data of the printing sample in real time. The printing control variables are automatically adjusted using the printing characteristic data to obtain the target printing variables. The template solidification module is used to generate a production template file for printing the animation file to be printed, based on the difference model, the segmented printing plate compensation curve, and the target printing variable, and to complete color management.

15. A color management device for 300-line animation printed materials, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed, implements the method steps of the 300-line animation printing color management method as described in any one of claims 1 to 13.

16. A computer storage medium, characterized in that, The computer storage medium includes at least one instruction that, when executed by a computer, implements the method steps of the 300-line animation print color management method as described in any one of claims 1 to 13.

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