Intelligent optimization control method for saving pigment for printing machine

Abstract

The invention discloses an intelligent optimization control method for a printing machine to save pigment, and relates to the technical field of ink printing. Obtaining a maximum unrecognizable distance; forming an ink ratio critical value; establishing an ink droplet ink-jet forming model, and calculating to obtain a local ink amount; obtaining at least one point to be jetted; when the printing color in the contour of the to-be-printed text is black, ink jet operation is carried out on the to-be-jetted points; and when the printing color in the to-be-printed text contour is not black, obtaining the use proportions of the red pigment, the blue pigment and the yellow pigment, and sequentially spraying the pigment at the to-be-jetted point according to the use proportions of the red pigment, the blue pigment and the yellow pigment. The maximum unrecognizable distance is obtained, the ink ratio critical value is formed, the ink droplet ink jet forming model is established, and therefore the local ink amount and at least one to-be-jetted point are determined, and ink and pigment are used as little as possible.

Description

Technical Field

[0001] The invention relates to the technical field of ink printing, and in particular to an intelligent optimization control method for saving pigments in a printing press. Background Art

[0002] A printing press is a machine for printing text and images. Modern printing presses are generally composed of mechanisms such as plate loading, inking, pressing, and paper feeding. Its working principle is: first, the text and image to be printed are made into a printing plate, which is then installed on the printing press. Then, the printing press applies ink to the area on the printing plate where the text and image are located, and then directly or indirectly transfers the ink to paper or other substrates. In the use of a printing press, ink control is particularly important for cost control.

[0003] However, the existing printing presses perform indiscriminate inkjet, and the inkjet volume and inkjet interval are fixed, resulting in the inability to optimize the consumption of ink and pigment. There is still room for reduction in the cost of using the printing press. Summary of the invention

[0004] In order to solve the above technical problems, an intelligent optimization control method for saving pigments for a printing press is provided. This technical solution solves the problem proposed in the above background technology that the existing printing presses perform indiscriminate inkjet, and the inkjet volume and inkjet interval distance are fixed, resulting in the inability to optimize the consumption of ink and pigment, and the use cost of the printing press has a certain room for reduction.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] An intelligent optimization control method for saving pigments in a printing press, comprising:

[0007] Acquire at least one text to be printed by a printing press, the text consisting of words or images;

[0008] Performing text contour recognition on printing paper to obtain the contour of the text to be printed;

[0009] Based on the recognition data of human eyes, the maximum unrecognizable distance is obtained;

[0010] Based on the recognition data of human eyes, a critical value of ink proportion is formed;

[0011] Establishing an ink droplet jetting model, and calculating the local ink volume jetted within the outline of the text to be printed based on the ink droplet jetting model and the critical value of the ink proportion;

[0012] Determine the inkjet position within the outline of the text to be printed to obtain at least one inkjet point;

[0013] When the printing color within the outline of the text to be printed is black, inkjet operation is performed at the point to be inkjetted;

[0014] When the printing color within the outline of the text to be printed is not black, the characteristic color at the point to be inkjetted is obtained, and the characteristic color is decomposed to obtain the usage ratio of red pigment, blue pigment and yellow pigment, and the pigment spraying operation is performed in sequence at the point to be inkjetted according to the usage ratio of red pigment, blue pigment and yellow pigment.

[0015] Preferably, the step of performing text contour recognition on printing paper to obtain the contour of the text to be printed comprises the following steps:

[0016] A simulated printed image of the text on the printing paper is obtained, and contour recognition is performed on the simulated printed image to obtain the contour of the text to be printed.

[0017] Preferably, the obtaining of the maximum unrecognizable distance based on the recognition data of the human eye comprises the following steps:

[0018] Randomly obtain the recognizable distance of the human eye, and ensure that the line segment with a length equal to the recognizable distance can be recognized by the human eye;

[0019] A recognizable distance interval is formed, and the two end points of the recognizable distance interval are respectively 0 and the recognizable distance;

[0020] Equally spaced segmentation can identify distance intervals and obtain at least one distance point;

[0021] Inkjet is used to obtain a group to be identified, the group to be identified is composed of a first ink line and a second ink line, the first ink line and the second ink line are of the same length, the first ink line and the second ink line are arranged in parallel, and the distance between the first ink line and the second ink line is equal to the value at the distance point;

[0022] Inkjet to obtain at least one third ink line, the third ink line having the same length as the second ink line;

[0023] Randomly move the group to be identified to at least one third ink line to form a mixed ink line group, and record the position of the group to be identified;

[0024] Obtaining the identification status of at least one sample person on the to-be-identified group in the mixed ink line group, when the identification is wrong, the first count number is accumulated by 1, and the first count number is initially 0;

[0025] The first counting number is divided by the total number of at least one sample person to obtain a first verification ratio;

[0026] When the first verification ratio is greater than the preset ratio, the distance point corresponding to the to-be-identified group is taken as the target distance point;

[0027] The maximum value of at least one target distance point is taken as the maximum unrecognizable distance.

[0028] Preferably, the forming of the ink ratio critical value based on the recognition data of the human eye comprises the following steps:

[0029] An ink ratio interval is formed, and the two end points of the ink ratio interval are respectively 0 and 1;

[0030] Divide the ink ratio interval at equal intervals to obtain at least one ratio point;

[0031] Evenly spray ink in a preset area to obtain a first inkjet image, wherein the proportion of ink in the preset area is a value at a proportional point;

[0032] Performing uniform inkjet printing in at least one characteristic region to obtain at least one second inkjet image, wherein the characteristic region is consistent with the preset region in size and shape;

[0033] randomly mixing the first inkjet image into at least one second inkjet image to form a mixed image group, and recording the position of the first inkjet image;

[0034] Obtaining recognition of the first inkjet image in the mixed image group by at least one sample person, when the recognition is wrong, the second count number is accumulated by 1, and the second count number is initially 0;

[0035] The second counting number is divided by the total number of at least one sample person to obtain a second verification ratio;

[0036] When the second verification ratio is greater than the preset ratio, the ratio point corresponding to the first inkjet image is used as the target ratio point;

[0037] The minimum value of at least one target ratio point is used as the ink ratio critical value.

[0038] Preferably, the establishment of the ink droplet inkjet forming model comprises the following steps:

[0039] When obtaining inkjet, the value range of the inkjet amount is divided into equal intervals to obtain at least one identification point;

[0040] Ink is sprayed to obtain a characteristic ink dot, and the amount of ink sprayed at the characteristic ink dot is equal to the value at the identification point;

[0041] Obtain the area of ​​the characteristic ink dot after drying as the characteristic area;

[0042] The value at the identification point is paired with the characteristic area and fitted to obtain a forming fitting function, in which the value at the identification point is the dependent variable and the characteristic area is the independent variable.

[0043] Preferably, the method of calculating the local ink amount to be jetted within the outline of the text to be printed based on the ink droplet jetting forming model and the ink proportion critical value comprises the following steps:

[0044] Evenly dividing the outline of the text to be printed into at least one recognition block, obtaining the area of ​​the recognition block and the total number of the at least one recognition block, and calculating the area of ​​the outline of the text to be printed;

[0045] The area of ​​the outline of the text to be printed is multiplied by the critical value of the ink ratio to obtain the ink coverage area;

[0046] Substitute the ink coverage area into the molding fitting function to obtain the actual total amount of ink;

[0047] Evenly divide the outline of the text to be printed into at least one grid block, the grid block is a square, and the side length of the grid block is the maximum unrecognizable distance;

[0048] The actual total amount of ink is divided by the total number of at least one grid block to obtain the local ink amount, and the amount of ink jetted at the center position of the grid block is the local ink amount.

[0049] Preferably, the step of determining the inkjet position within the outline of the text to be printed to obtain at least one inkjet point comprises the following steps:

[0050] The center of the grid block is used as the point to be sprayed.

[0051] Preferably, the inkjet operation at the inkjet point includes the following steps:

[0052] When the inkjet operation is performed at the inkjet point, the inkjet is performed according to the calculated inkjet radius.

[0053] Preferably, decomposing the characteristic color to obtain the usage ratio of red pigment, blue pigment and yellow pigment comprises the following steps:

[0054] At least one ratio allocation group is randomly obtained, the ratio allocation group consists of a first ratio, a second ratio and a third ratio, and the sum of the first ratio, the second ratio and the third ratio is equal to 1;

[0055] Distribute the first ratio, the second ratio and the third ratio to the red pigment, the blue pigment and the yellow pigment in sequence;

[0056] Based on big data, a target color formed by mixing red pigment, blue pigment, and yellow pigment in a distributed ratio is obtained;

[0057] The first ratio, the second ratio, and the third ratio corresponding to the target color with the smallest difference from the characteristic color are used as the first target ratio, the second target ratio, and the third target ratio.

[0058] Preferably, the pigment spraying operation at the inkjet point in sequence according to the usage ratio of red pigment, blue pigment and yellow pigment comprises the following steps:

[0059] The local ink volume is multiplied by the first target ratio to obtain the red ink jetting volume;

[0060] The local ink volume is multiplied by the second target ratio to obtain the blue ink jetting volume;

[0061] The local ink volume is multiplied by the third target ratio to obtain the yellow ink jetting volume;

[0062] At the inkjet point, a red pigment with a volume equal to the red inkjet amount, a blue pigment with a volume equal to the blue inkjet amount, and a yellow pigment with a volume equal to the yellow inkjet amount are sprayed in sequence.

[0063] Compared with the prior art, the present invention has the following beneficial effects:

[0064] By obtaining the maximum unrecognizable distance, forming the critical value of ink proportion and establishing the ink droplet inkjet forming model, the local ink amount and at least one point to be inkjetted are determined. Since the critical value of ink proportion and the maximum unrecognizable distance are set according to the recognition limit of the human eye, the inkjet amount and inkjet spacing set according to the parameters can ensure the imaging effect of text printing. In addition, in the process of determining the inkjet parameters, the diffusion caused by the ink drying is also taken into account, which can further reduce the amount of ink sprayed each time, thereby using as little ink and pigment as possible, and further reducing the cost of using the printing press. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 It is a schematic flow chart of the intelligent optimization control method for saving pigments in a printing press according to the present invention;

[0066] Figure 2 A schematic diagram of a process for obtaining a maximum unrecognizable distance based on recognition data of the human eye according to the present invention;

[0067] Figure 3 It is a schematic diagram of a process of forming a critical value of ink proportion based on recognition data of human eyes in the present invention;

[0068] Figure 4 A schematic diagram of the process of establishing an ink droplet inkjet forming model according to the present invention;

[0069] Figure 5 A schematic diagram of a process for calculating the amount of local ink to be jetted within the outline of a text to be printed based on an ink droplet jetting forming model and a critical value of ink proportion according to the present invention;

[0070] Figure 6 A schematic diagram of a process for decomposing characteristic colors to obtain the usage ratios of red pigment, blue pigment and yellow pigment according to the present invention;

[0071] Figure 7The present invention is a flow chart of the pigment spraying operation of sequentially performing the pigment spraying operation at the inkjet point according to the usage ratio of the red pigment, the blue pigment and the yellow pigment. DETAILED DESCRIPTION

[0072] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0073] Reference Figure 1 As shown, an intelligent optimization control method for saving pigments in a printing press comprises:

[0074] Acquire at least one text to be printed by a printing press, the text consisting of words or images;

[0075] Performing text contour recognition on printing paper to obtain the contour of the text to be printed;

[0076] Based on the recognition data of human eyes, the maximum unrecognizable distance is obtained;

[0077] Based on the recognition data of human eyes, a critical value of ink proportion is formed;

[0078] Establishing an ink droplet jetting model, and calculating the local ink volume jetted within the outline of the text to be printed based on the ink droplet jetting model and the critical value of the ink proportion;

[0079] Determine the inkjet position within the outline of the text to be printed to obtain at least one inkjet point;

[0080] When the printing color within the outline of the text to be printed is black, inkjet operation is performed at the point to be inkjetted;

[0081] When the printing color within the outline of the text to be printed is not black, the characteristic color at the point to be inkjetted is obtained, and the characteristic color is decomposed to obtain the usage ratio of red pigment, blue pigment and yellow pigment, and the pigment spraying operation is performed in sequence at the point to be inkjetted according to the usage ratio of red pigment, blue pigment and yellow pigment.

[0082] In this scheme, due to the influence of the resolution of the human eye, it is not necessary to fully cover the area of ​​the text to be printed with ink, and the ink can be sprayed at intervals. At the same time, the corresponding control of the inkjet amount requires attention to two points. One is the proportion of the inkjet area in the area where inkjet is required. As long as the proportion of the inkjet area is sufficient, the imaging effect of the overall area can meet the needs. In addition, the inkjet interval needs to be determined. Because the inkjet is performed at intervals, there is a gap between the two ink dots, and the gap must not be recognized by the human eye, otherwise it will affect the imaging effect. When determining the inkjet interval, it is also necessary to consider that the ink dots will diffuse during the drying process. Therefore, only considering the projected area of ​​the inkjet amount of the ink dots will lead to an increase in ink usage. In order to further reduce ink usage, the diffusion of the ink dots during the drying process is also taken into consideration. Therefore, the generated scheme can control the use of inkjet to a large extent, thereby saving ink usage more than the commonly used printing method.

[0083] Performing text contour recognition on printing paper to obtain the contour of the text to be printed includes the following steps:

[0084] A simulated printed image of the text on the printing paper is obtained, and contour recognition is performed on the simulated printed image to obtain the contour of the text to be printed.

[0085] Taking text as an example, each character has a corresponding outline. In order to print the character, ink needs to be sprayed within the outline of the character, so the outline of the text to be printed needs to be obtained, and the same is true for images.

[0086] Reference Figure 2 As shown, based on the recognition data of the human eye, obtaining the maximum unrecognizable distance includes the following steps:

[0087] Randomly obtain the recognizable distance of the human eye, and ensure that the line segment with a length equal to the recognizable distance can be recognized by the human eye;

[0088] A recognizable distance interval is formed, and the two end points of the recognizable distance interval are respectively 0 and the recognizable distance;

[0089] Equally spaced segmentation can identify distance intervals and obtain at least one distance point;

[0090] Inkjet is used to obtain a group to be identified, the group to be identified is composed of a first ink line and a second ink line, the first ink line and the second ink line are of the same length, the first ink line and the second ink line are arranged in parallel, and the distance between the first ink line and the second ink line is equal to the value at the distance point;

[0091] Inkjet to obtain at least one third ink line, the third ink line having the same length as the second ink line;

[0092] Randomly move the group to be identified to at least one third ink line to form a mixed ink line group, and record the position of the group to be identified;

[0093] Obtaining the identification status of at least one sample person on the to-be-identified group in the mixed ink line group, when the identification is wrong, the first count number is accumulated by 1, and the first count number is initially 0;

[0094] The first counting number is divided by the total number of at least one sample person to obtain a first verification ratio;

[0095] When the first verification ratio is greater than the preset ratio, the distance point corresponding to the to-be-identified group is taken as the target distance point;

[0096] The maximum value of at least one target distance point is taken as the maximum unrecognizable distance.

[0097] The preset ratio is a decimal very close to 1. When the first verification ratio is greater than the preset ratio, it means that most of the sample persons cannot identify the group to be identified. Therefore, it means that the intervals generated by the distance points corresponding to the group to be identified cannot be identified. Since the smaller the interval, the more difficult it is to identify, the maximum value of at least one target distance point is used as the maximum unrecognizable distance. The maximum unrecognizable distance is used to assist in setting the inkjet interval. This can control the inkjet usage to the greatest extent. At the same time, it cannot be recognized by the human eye, that is, it will not affect the printed imaging effect.

[0098] Reference Figure 3 As shown, based on the recognition data of the human eye, forming the ink ratio critical value includes the following steps:

[0099] An ink ratio interval is formed, and the two end points of the ink ratio interval are respectively 0 and 1;

[0100] Divide the ink ratio interval at equal intervals to obtain at least one ratio point;

[0101] Evenly spray ink in a preset area to obtain a first inkjet image, wherein the proportion of ink in the preset area is a value at a proportional point;

[0102] Performing uniform inkjet printing in at least one characteristic region to obtain at least one second inkjet image, wherein the characteristic region is consistent with the preset region in size and shape;

[0103] randomly mixing the first inkjet image into at least one second inkjet image to form a mixed image group, and recording the position of the first inkjet image;

[0104] Obtaining recognition of the first inkjet image in the mixed image group by at least one sample person, when the recognition is wrong, the second count number is accumulated by 1, and the second count number is initially 0;

[0105] The second counting number is divided by the total number of at least one sample person to obtain a second verification ratio;

[0106] When the second verification ratio is greater than the preset ratio, the ratio point corresponding to the first inkjet image is used as the target ratio point;

[0107] The minimum value of at least one target ratio point is used as the ink ratio critical value.

[0108] When the second verification ratio is greater than the preset ratio, it means that most of the sample personnel are unable to identify the first inkjet image. Therefore, it means that the overall inkjet effect produced by the proportion points corresponding to the first inkjet image is consistent with the inkjet effect of full coverage. Since the larger the inkjet ratio, the more difficult it is to identify the difference, therefore, the minimum value of at least one target proportion point is used as the ink ratio critical value. Using the ink ratio critical value to set the inkjet coverage ratio can control the ink usage to the greatest extent. At the same time, it can not be recognized by the human eye, that is, it will not affect the printed imaging effect.

[0109] Reference Figure 4 As shown, establishing the ink droplet inkjet forming model includes the following steps:

[0110] When obtaining inkjet, the value range of the inkjet amount is divided into equal intervals to obtain at least one identification point;

[0111] Ink is sprayed to obtain a characteristic ink dot, and the amount of ink sprayed at the characteristic ink dot is equal to the value at the identification point;

[0112] Obtain the area of ​​the characteristic ink dot after drying as the characteristic area;

[0113] The value at the identification point is paired with the characteristic area and fitted to obtain a forming fitting function, in which the value at the identification point is the dependent variable and the characteristic area is the independent variable.

[0114] The ink dots formed by inkjet will gradually spread out during the drying process, and the final area will be larger than the projected area during inkjet. Therefore, this needs to be taken into consideration. Since the shapes of inkjet droplets are basically the same, they can be approximately regarded as spheres. Therefore, there is a certain functional relationship between the final drying imaging area of ​​the inkjet and the inkjet amount. Therefore, the forming fitting function is determined by fitting. Here, the characteristic area needs to be the independent variable in the forming fitting function. This is specially set to facilitate the subsequent determination of the local ink amount.

[0115] Reference Figure 5 As shown, based on the ink droplet jetting model and the ink proportion critical value, calculating the local ink amount jetted within the outline of the text to be printed includes the following steps:

[0116] Evenly dividing the outline of the text to be printed into at least one recognition block, obtaining the area of ​​the recognition block and the total number of the at least one recognition block, and calculating the area of ​​the outline of the text to be printed;

[0117] The area of ​​the outline of the text to be printed is multiplied by the critical value of the ink ratio to obtain the ink coverage area;

[0118] Substitute the ink coverage area into the molding fitting function to obtain the actual total amount of ink;

[0119] Evenly divide the outline of the text to be printed into at least one grid block, the grid block is a square, and the side length of the grid block is the maximum unrecognizable distance;

[0120] The actual total amount of ink is divided by the total number of at least one grid block to obtain the local ink amount, and the amount of ink jetted at the center position of the grid block is the local ink amount.

[0121] The area of ​​the outline of the text to be printed is calculated by approximation. When the recognition block is small enough, the error will be as small as possible;

[0122] The purpose of generating the grid blocks here is to determine the points to be sprayed, and at the same time, to ensure that the interval between inkjet is within the maximum unrecognizable distance. This is because the center distance between two adjacent grid blocks is equal to the side length of the grid blocks, that is, the maximum unrecognizable distance. When inkjet is performed in the center of the grid block, then after the ink dots are spread out, the interval between inkjet will inevitably be smaller than the maximum unrecognizable distance. Therefore, the gaps between adjacent ink dots will not be recognized by the human eye. In addition, due to the setting of the local ink amount, the area ratio of the actual total amount of ink after drying and diffusion within the outline of the text to be printed is equal to the critical value of the ink ratio. Therefore, the overall imaging effect is consistent with the effect of full ink coverage.

[0123] Determining the inkjet position within the outline of the text to be printed to obtain at least one inkjet point includes the following steps:

[0124] The center of the grid block is used as the point to be sprayed.

[0125] The inkjet operation at the inkjet point includes the following steps:

[0126] When the inkjet operation is performed at the inkjet point, the inkjet is performed according to the calculated inkjet radius.

[0127] Reference Figure 6 As shown, decomposing the characteristic colors to obtain the usage ratio of red pigment, blue pigment and yellow pigment includes the following steps:

[0128] At least one ratio allocation group is randomly obtained, the ratio allocation group consists of a first ratio, a second ratio and a third ratio, and the sum of the first ratio, the second ratio and the third ratio is equal to 1;

[0129] Distribute the first ratio, the second ratio and the third ratio to the red pigment, the blue pigment and the yellow pigment in sequence;

[0130] Based on big data, a target color formed by mixing red pigment, blue pigment, and yellow pigment in a distributed ratio is obtained;

[0131] The first ratio, the second ratio, and the third ratio corresponding to the target color with the smallest difference from the characteristic color are used as the first target ratio, the second target ratio, and the third target ratio.

[0132] When the printing color within the outline of the text to be printed is black, it is only necessary to spray the ink. However, when the printing color within the outline of the text to be printed is not black, it is relatively complicated. First, the colors need to be matched. In printing, red pigment, blue pigment and yellow pigment are usually matched to obtain the characteristic color. Since there are different mixing effects of red pigment, blue pigment and yellow pigment in big data, it is sufficient to retrieve the ratio with the smallest difference from the characteristic color. When inkjetting, the three pigments of red pigment, blue pigment and yellow pigment are sprayed. Since the amount of inkjet required at the point to be inkjetted is the local ink amount, when the three colors are inkjetted, the local ink amount is distributed according to the proportion, and the inkjet mixing is performed in sequence.

[0133] Reference Figure 7 As shown, the pigment spraying operation is performed in sequence according to the usage ratio of red pigment, blue pigment and yellow pigment at the inkjet point, including the following steps:

[0134] The local ink volume is multiplied by the first target ratio to obtain the red ink jetting volume;

[0135] The local ink volume is multiplied by the second target ratio to obtain the blue ink jetting volume;

[0136] The local ink volume is multiplied by the third target ratio to obtain the yellow ink jetting volume;

[0137] At the inkjet point, a red pigment with a volume equal to the red inkjet amount, a blue pigment with a volume equal to the blue inkjet amount, and a yellow pigment with a volume equal to the yellow inkjet amount are sprayed in sequence.

[0138] Furthermore, the present solution also proposes a storage medium on which a computer-readable program is stored. When the computer-readable program is called, the above-mentioned intelligent optimization control method for saving pigments in a printing press is executed.

[0139] It is understandable that the storage medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; an optical medium, such as a DVD; or a semiconductor medium, such as a solid state drive (SSD).

[0140] In summary, the advantages of the present invention are: by obtaining the maximum unrecognizable distance, forming the critical value of ink proportion and establishing the ink droplet inkjet forming model, and thereby determining the local ink amount and at least one point to be inkjetted, since the critical value of ink proportion and the maximum unrecognizable distance are set according to the recognition limit of the human eye, the inkjet amount and inkjet spacing set according to the parameters can ensure the imaging effect of text printing. In addition, in the process of determining the inkjet parameters, the diffusion caused by the ink drying is also taken into account, which can further reduce the amount of ink sprayed each time, thereby using as little ink and pigment as possible, and further reducing the cost of using the printing press.

[0141] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An intelligent optimization control method for saving pigments in a printing press, characterized in that: include: Acquire at least one text to be printed by a printing press, the text consisting of words or images; Performing text contour recognition on printing paper to obtain the contour of the text to be printed; Based on the recognition data of human eyes, the maximum unrecognizable distance is obtained; Based on the recognition data of human eyes, a critical value of ink proportion is formed; Establishing an ink droplet jetting model, and calculating the local ink volume jetted within the outline of the text to be printed based on the ink droplet jetting model and the critical value of the ink proportion; Determine the inkjet position within the outline of the text to be printed to obtain at least one inkjet point; When the printing color within the outline of the text to be printed is black, inkjet operation is performed at the point to be inkjetted; When the printing color within the outline of the text to be printed is not black, the characteristic color at the point to be inkjetted is obtained, and the characteristic color is decomposed to obtain the usage ratio of red pigment, blue pigment and yellow pigment, and the pigment spraying operation is performed in sequence at the point to be inkjetted according to the usage ratio of red pigment, blue pigment and yellow pigment.

2. The intelligent optimization control method for saving pigments in a printing press according to claim 1, characterized in that: The process of performing text contour recognition on printing paper to obtain the text contour to be printed comprises the following steps: A simulated printed image of the text on the printing paper is obtained, and contour recognition is performed on the simulated printed image to obtain the contour of the text to be printed.

3. The intelligent optimization control method for saving pigments in a printing press according to claim 2, characterized in that: The method of obtaining the maximum unrecognizable distance based on the recognition data of the human eye comprises the following steps: Randomly obtain the recognizable distance of the human eye, and ensure that the line segment with a length equal to the recognizable distance can be recognized by the human eye; A recognizable distance interval is formed, and the two end points of the recognizable distance interval are respectively 0 and the recognizable distance; Equally spaced segmentation can identify distance intervals and obtain at least one distance point; Inkjet is used to obtain a group to be identified, the group to be identified is composed of a first ink line and a second ink line, the first ink line and the second ink line are of the same length, the first ink line and the second ink line are arranged in parallel, and the distance between the first ink line and the second ink line is equal to the value at the distance point; Inkjet to obtain at least one third ink line, the third ink line having the same length as the second ink line; Randomly move the group to be identified to at least one third ink line to form a mixed ink line group, and record the position of the group to be identified; Obtaining the identification status of at least one sample person on the to-be-identified group in the mixed ink line group, when the identification is wrong, the first count number is accumulated by 1, and the first count number is initially 0; The first counting number is divided by the total number of at least one sample person to obtain a first verification ratio; When the first verification ratio is greater than the preset ratio, the distance point corresponding to the to-be-identified group is taken as the target distance point; The maximum value of at least one target distance point is taken as the maximum unrecognizable distance.

4. The intelligent optimization control method for saving pigments in a printing press according to claim 3, characterized in that: The forming of the ink ratio critical value based on the recognition data of the human eye comprises the following steps: An ink ratio interval is formed, and the two end points of the ink ratio interval are respectively 0 and 1; Divide the ink ratio interval at equal intervals to obtain at least one ratio point; Evenly spray ink in a preset area to obtain a first inkjet image, wherein the proportion of ink in the preset area is a value at a proportional point; Performing uniform inkjet printing in at least one characteristic region to obtain at least one second inkjet image, wherein the characteristic region is consistent with the preset region in size and shape; randomly mixing the first inkjet image into at least one second inkjet image to form a mixed image group, and recording the position of the first inkjet image; Obtaining recognition of the first inkjet image in the mixed image group by at least one sample person, when the recognition is wrong, the second count number is accumulated by 1, and the second count number is initially 0; The second counting number is divided by the total number of at least one sample person to obtain a second verification ratio; When the second verification ratio is greater than the preset ratio, the ratio point corresponding to the first inkjet image is used as the target ratio point; The minimum value of at least one target ratio point is used as the ink ratio critical value.

5. The intelligent optimization control method for saving pigments in a printing press according to claim 4, characterized in that: The ink droplet inkjet forming model is established, comprising the following steps: When obtaining inkjet, the value range of the inkjet amount is divided into equal intervals to obtain at least one identification point; Ink is sprayed to obtain a characteristic ink dot, and the amount of ink sprayed at the characteristic ink dot is equal to the value at the identification point; Obtain the area of ​​the characteristic ink dot after drying as the characteristic area; The value at the identification point is paired with the characteristic area and fitted to obtain a forming fitting function, in which the value at the identification point is the dependent variable and the characteristic area is the independent variable.

6. The intelligent optimization control method for saving pigments in a printing press according to claim 5, characterized in that: The method of calculating the local ink volume to be jetted within the outline of the text to be printed based on the ink droplet jetting forming model and the ink proportion critical value comprises the following steps: Evenly dividing the outline of the text to be printed into at least one recognition block, obtaining the area of ​​the recognition block and the total number of the at least one recognition block, and calculating the area of ​​the outline of the text to be printed; The area of ​​the outline of the text to be printed is multiplied by the critical value of the ink ratio to obtain the ink coverage area; Substitute the ink coverage area into the molding fitting function to obtain the actual total amount of ink; Evenly divide the outline of the text to be printed into at least one grid block, the grid block is a square, and the side length of the grid block is the maximum unrecognizable distance; The actual total amount of ink is divided by the total number of at least one grid block to obtain the local ink amount, and the amount of ink jetted at the center position of the grid block is the local ink amount.

7. The intelligent optimization control method for saving pigments in a printing press according to claim 6, characterized in that: The step of determining the inkjet position within the outline of the text to be printed to obtain at least one inkjet point comprises the following steps: The center of the grid block is used as the point to be sprayed.

8. The intelligent optimization control method for saving pigments in a printing press according to claim 7, characterized in that: The inkjet operation at the inkjet point includes the following steps: When the inkjet operation is performed at the inkjet point, the inkjet is performed according to the calculated inkjet radius.

9. The intelligent optimization control method for saving pigments in a printing press according to claim 8, characterized in that: Decomposing the characteristic colors to obtain the usage ratios of red pigment, blue pigment and yellow pigment comprises the following steps: At least one ratio allocation group is randomly obtained, the ratio allocation group consists of a first ratio, a second ratio and a third ratio, and the sum of the first ratio, the second ratio and the third ratio is equal to 1; Distribute the first ratio, the second ratio and the third ratio to the red pigment, the blue pigment and the yellow pigment in sequence; Based on big data, a target color formed by mixing red pigment, blue pigment, and yellow pigment in a distributed ratio is obtained; The first ratio, the second ratio, and the third ratio corresponding to the target color with the smallest difference from the characteristic color are used as the first target ratio, the second target ratio, and the third target ratio.

10. The intelligent optimization control method for saving pigments in a printing press according to claim 9, characterized in that: The pigment spraying operation at the inkjet point according to the usage ratio of red pigment, blue pigment and yellow pigment in sequence comprises the following steps: The local ink volume is multiplied by the first target ratio to obtain the red ink jetting volume; The local ink volume is multiplied by the second target ratio to obtain the blue ink jetting volume; The local ink volume is multiplied by the third target ratio to obtain the yellow ink jetting volume; At the inkjet point, a red pigment with a volume equal to the red inkjet amount, a blue pigment with a volume equal to the blue inkjet amount, and a yellow pigment with a volume equal to the yellow inkjet amount are sprayed in sequence.

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