Printing technological process of secret-related printing system

Abstract

The invention discloses a printing process flow of a secret-related printing system, which relates to the field of printing and comprises the following steps: selecting printing equipment according to printing requirements, acquiring the maximum printing tensor and the printing time sequence of the printing equipment by a control module of the printing equipment according to a printing parameter list stored in a storage module, and calculating an optimal typesetting mode; generating a typesetting file corresponding to printing according to the optimal typesetting mode; the printing system calculates a corresponding printing tensor and a printing time sequence according to the printing and typesetting parameters, and typesetting is carried out; the printing parameters are sent to printing equipment, the printing equipment obtains corresponding images in the printing color plate, and printing is conducted according to the printing parameters; and when the image in the printing color plate is the dot image, converting data corresponding to the image into a dot tone value, and performing dot engraving according to the dot tone value. The printable parameters are recorded through the printing parameter list, the typesetting mode is calculated through the control module according to the printable parameters of the printing equipment, the adjustment time is shortened, and the printing effect is improved.

Description

Technical Field

[0001] The invention relates to the field of printing technology, and in particular to a printing process flow of a confidential printing system. Background Art

[0002] At present, the printing process is mainly realized through pre-printing platemaking and engraving during printing. The pre-printing platemaking process generally includes: creating a new page, setting the printed page size, page starting number and columns; determining the position of text and patterns in each column according to the design draft, and writing the typesetting program document; printing the sample draft, and debugging and modifying the written typesetting program document until it meets the printing requirements; exporting the typesetting program document that meets the printing requirements after debugging and modification. For example, Chinese patent document CN104332958A discloses a control method and system for an anti-counterfeit bill printing process flow, which establishes an anti-counterfeit bill information database, an anti-counterfeit bill template database, and an approval process information database for the anti-counterfeit bill printing process flow; receives element information of the anti-counterfeit bill input by a user, generates an anti-counterfeit bill template of the anti-counterfeit bill according to the received element information of the anti-counterfeit bill, and creates an anti-counterfeit bill printing process flow for the anti-counterfeit bill template; sends the printing process flow of the anti-counterfeit bill template to a process engine server to start and execute the printing process flow of the anti-counterfeit bill corresponding to the anti-counterfeit bill template; receives audit feedback information fed back by each auditing party user corresponding to the anti-counterfeit bill, and sends the received audit feedback information to the process engine server to process and approve the printing process flow of the anti-counterfeit bill, thereby realizing customization of the approval nodes, approvers, audit authority, audit time limit, and audit feedback information of the anti-counterfeit bill printing process flow involved in the printing of the anti-counterfeit bill, thereby improving the security of the process of printing the anti-counterfeit bill.

[0003] However, the above method can only be used for the printing of a single anti-counterfeiting bill during printing, and the printing volume cannot be adjusted according to the printing requirements. At the same time, during printing, the image is engraved on the surface of the printing plate by engraving, and a specially designed engraving device is required to engrave according to the image content. The operation is inconvenient and the cost is high. If an engraving error occurs during engraving, it needs to be re-engraved, which seriously wastes materials and labor costs and affects the engraving quality and efficiency. In addition, for confidential printed materials, the above method cannot adjust the brightness of the image during printing, and cannot achieve the changing printing effect of the light and dark scheduling of the printed area of ​​the image, let alone the encryption effect of the printed product. Therefore, how to provide a printing process flow for anti-counterfeiting printed products, adjust the brightness of the printed image during printing, achieve the light and dark changes in the printed area of ​​the image, and improve the printing quality and efficiency is of great significance to the printing industry. Summary of the invention

[0004] In view of this, the present invention provides a printing process flow for a confidential printing system, which can print according to printing layout parameters to obtain the optimal printing layout result; the image is segmented and engraved according to the dot image and background image, thereby improving printing efficiency and reducing printing costs.

[0005] The printing process of the confidential printing system includes:

[0006] S1. Select a printing device according to the printing demand, and the control module of the printing device obtains the maximum printing volume and printing timing of the printing device according to the printing parameter list stored in the storage module, and calculates the optimal typesetting method;

[0007] S2. Generate a typesetting file corresponding to printing according to the optimal typesetting method; the typesetting file includes printing typesetting parameters and printing color plates in sequence, the printing typesetting parameters include corresponding printing tensors and printing timing, and the printing color plates include dot images and image backgrounds;

[0008] S3. Sending the printing layout parameters and printing color plates to the printing system, the printing system calculates the corresponding printing tensor and printing timing according to the printing layout parameters and typesets them;

[0009] S4. Convert the printing color plate into printing parameters recognizable by the printing device, send the printing parameters to the printing device, the printing device obtains the corresponding image in the printing color plate, and prints according to the printing parameters; when the image in the printing color plate is a dot image, convert the data corresponding to the image into dot tone values, and perform dot engraving according to the dot tone values; when the image in the printing color plate is a background image, generate a line grid shadow according to the data corresponding to the image.

[0010] Optionally, in step S4, when the image in the printing color plate is a halftone image, it is converted into a halftone tone value by the following formula:

[0011] Among them, h is the dot tone value, Tc is the dot ink coverage, c = red, black, magenta, yellow, or cyan, black, magenta, light cyan, light black, or light red; Yo is the background ink coverage, and DWM is the dot engraving depth.

[0012] Optionally, in step S4, when printing is performed according to the dot tone value, a halftone engraving machine is used to perform dot engraving, and the halftone engraving machine is used to receive a digital signal and perform engraving.

[0013] As a preferred solution of the present invention, in step S4, when the image in the printed color plate is a background image, it is calculated by the following formula: S(i,j)=D(i,j)*F(i,j) wherein (i,j) represents the position coordinates of the pixel point, S(i,j) is the grayscale value of the pixel (i,j), D(i,j) is the brightness of the pixel (i,j), and F(i,j) is the pixel value of the pixel (i,j); the brightness D(i,j) is calculated by the following formula: D(i,j)={0.5×[D(i-1,j)+D(i+1,j)+D(i,j-1)+D(i,j+1)]+D(i,j)}×0.25 wherein the pixel value F(i,j) is 0 or 1.

[0014] Optionally, in step S4, a dot matrix is ​​established according to the calculation result, and the dot matrix is ​​1 or 0; the dot depth of the image is calculated according to the dot matrix, engraving is performed according to the dot depth of the image, and after engraving, printing is performed on the machine according to the dot matrix.

[0015] Optionally, in step S4, when the image in the printing color plate is a background image, the background image is split into multiple sub-blocks according to the pixel value and a dot plate matrix is ​​established, and the dot plate matrix is ​​1 or 0; the dot depth of the image is calculated according to the dot plate matrix, and engraving is performed according to the dot depth of the image. After engraving, printing is performed on the machine according to the dot plate matrix.

[0016] Optionally, the printing equipment includes scanning grayscale, hue, saturation, engraving dots, and printing on a machine, and the dot depth is calculated by the following formula: DW=α×(ΣD(i,j) / N), where DW is the dot depth, D(i,j) is the brightness of the pixel, and α is the dot complex factor.

[0017] Optionally, in step S4, when the image in the printing color plate is a dot image, grayscale dots corresponding to the dot image are generated by grayscale value calculation, the grayscale dots are registered by a rubber roller registration device, engraved according to the grayscale dots, and after engraving, printing is performed on the machine according to the grayscale dots.

[0018] Optionally, in step S4, when the image in the printing color plate is a dot image, if the image in the printing color plate is composed of a combination of two-color images, a rubber roller plate alignment device is used to generate a two-color dot image, and a printing device engraves according to the two-color dot image, and after engraving, it is printed on an engraving machine.

[0019] Optionally, in step S1, the printing layout parameters include: single-sided printing tensor A, single-sided printing timing a, double-sided printing tensor B, double-sided printing timing b, three-sided printing tensor C, three-sided printing timing c, and the optimal layout method includes single-sided printing, double-sided printing and three-sided printing; the above parameters are calculated according to the following formula: when the printing tensor is less than A, the printing layout parameters correspond to single-sided printing; when A≤printing tensor<B, the printing layout parameters correspond to double-sided printing; otherwise when B≤printing tensor<C, the printing layout parameters correspond to double-sided printing; otherwise, D is the dot density, the difference between B and A is at least 20%, and the difference between B and C is at least 20%, d∈(0,0.5], e∈(0,0.5]; when b=1, the printing device performs positive printing, and when b=0, the printing device performs back printing.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] By setting printing parameters for the printing equipment and obtaining the maximum printing tensor of the printing equipment according to the printing parameter list, the optimal typesetting method is calculated to improve printing efficiency; the printing typesetting parameters and printing color plates are sent to the printing system, and typesetting is performed through the printing system to improve printing consistency; the printing color plates are dot engraved or line-arranged by color, thereby improving printing accuracy and printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The figure is a flow chart of the printing process of the confidential printing system of the present invention. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Unless otherwise specified, the raw materials used in the present invention are all conventional products purchased from the market.

[0026] Example 1

[0027] Figure 1A flow chart of this embodiment is shown.

[0028] The present invention provides a printing process flow of a confidential printing system, comprising the following steps:

[0029] S1. The printing device selects a printing device, and the printing device obtains the maximum printing volume and printing timing of the printing device according to the printing parameter list stored in the storage module, and calculates the optimal typesetting method;

[0030] S2. Generate a typesetting file for printing according to the optimal typesetting method; the typesetting file includes printing typesetting parameters and printing color plates in sequence, the printing typesetting parameters include corresponding printing tensors and printing timing, and the printing color plates include dot images and image backgrounds;

[0031] S3. Send the printing layout parameters and printing color plate to the printing system, and the printing system calculates the corresponding printing tensor and printing timing according to the printing layout parameters and typesets them;

[0032] S4. Convert the printing color plate into printing parameters recognizable by the printing device, send the printing parameters to the printing device, and the printing device obtains the corresponding image in the printing color plate and prints according to the printing parameters; when the image in the printing color plate is a dot image, convert the data corresponding to the image into dot tone values, and perform dot engraving according to the dot tone values; when the image in the printing color plate is a background image, generate a line grid shadow according to the data corresponding to the image.

[0033] In S1, the printing parameter list includes various parameters of multiple printing devices, and the printing layout parameters are determined according to the calculation results, and the printing layout parameters are stored in the storage module of the printing system. Among them, the printing parameters include the following parameters:

[0034] S11. Printing equipment model;

[0035] S12. Equipment specifications and maximum printing volume; the printing equipment model corresponds to several specifications, and the printing volume includes single-sided printing volume and double-sided printing volume;

[0036] S13. Equipment printing sequence, including positive printing and back printing;

[0037] S14. Maximum dot density and maximum dot size;

[0038] S15. Monochrome printing timing and dot size corresponding to the timing;

[0039] S16. Four-color printing timing and dot size corresponding to the timing;

[0040] S17. Maximum engraving depth and engraving blade model;

[0041] S18. Type and model of rubber roller;

[0042] S19. Other printing parameters.

[0043] In S1, when the selected printing device cannot print, the printing device automatically switches to a corresponding printing device and records corresponding printing parameters.

[0044] In S2, different printing layout parameters are generated by the layout system, and the corresponding printing color plates are also generated by the layout system. The printing layout parameters include corresponding printing tensors, printing timing, and single-color printing and four-color printing, and the printing color plates include dot images and background images.

[0045] In S4, before engraving, an offline control module is added to the printing device to perform offline operation on the printing device; after engraving, the engraved printed matter is printed on the engraving machine to realize offline printing.

[0046] In step S4, the printing equipment includes scanning grayscale, hue, saturation, engraving dots, printing on the machine, and calculating the dot depth by the following formula:

[0047] DW(i,j)=α×(255-D(i,j)) / 255

[0048] Among them, DW is the dot depth, D(i,j) is the brightness of the pixel, and α is the dot complex factor.

[0049] The ink coverage of the halftone dots is calculated by the following formula:

[0050] Yo=Yo1-Yc

[0051] Among them, Yo is the coverage of the base color ink, Yo1 represents the ink, and Yc represents the dot.

[0052] Ink can be calculated in two ways:

[0053] (1) Dot color version

[0054] When the image contains more than two halftone color plates, the ink of the first halftone color plate is calculated by the following formula:

[0055] C1=C1 k+C2×C2k+C3×C3k+…+Cn×CnK

[0056] Wherein, C1 k is the dot area ratio of the kth dot in the first dot color version, and n is the number of dot color versions;

[0057] S(i, j) is the gray value corresponding to the jth dot in the i-th adjacent dot color plate;

[0058] Y1=C1×Y1 k

[0059] Wherein, Y1 is the ink coverage of the first halftone dot, and Y1 k is the dot area ratio of the kth halftone dot in the first halftone dot color plate;

[0060] (2) Grayscale layer

[0061] When the image contains a gray layer, the ink of the gray layer is calculated by the following formula

[0062] Y1=C1×D1

[0063] Among them, Y1 is the ink coverage of the first dot, D1 is the ink in the gray layer, and C1 is the engraving depth of the gray layer dot;

[0064] S(i, j) is the grayscale value of the i-th dot in the grayscale layer.

[0065] The specific carvings are as follows:

[0066] The printing equipment includes scanning grayscale, hue, saturation, engraving dots, printing on the machine, and calculating the dot depth by the following formula:

[0067] DW(i,j)=α×(255-D(i,j)) / 255

[0068] Wherein, DW is the dot depth, D(i, j) is the brightness of the pixel, and α is the dot complex factor.

[0069] When the image in the printed color plate is the background image, it is calculated using the following formula:

[0070] S(i, j) = D(i, j) * F(i, j)

[0071] Where (i, j) represents the position coordinates of the pixel, S(i, j) is the grayscale value of the pixel (i, j), D(i, j) is the brightness of the pixel, and F(i, j) is the pixel value of the pixel;

[0072] The brightness D(i, j) is calculated by the following formula: D(i, j) = {0.5 × [D(i-1, j) + D(i+1, j) + D(i, j-1) + D(i, j+1)] + D(i, j)} × 0.25

[0073] The pixel value F(i, j) is 0 or 1.

[0074] When the image in the printing color plate is a dot image, the dot image is split into multiple sub-blocks and a dot plate matrix is ​​established, and the dot plate matrix is ​​1 or 0; the dot depth of the image is calculated according to the dot plate matrix, and engraving is performed according to the dot depth of the image. After engraving, printing is performed on the machine according to the dot plate matrix.

[0075] The dot matrix is ​​calculated using the following formula:

[0076]

[0077] Wherein, T is a threshold value determined according to image characteristics and printing requirements, the size of the matrix is ​​M*N, F(i, j) is the pixel value of pixel (i, j), and D(i, j) is the brightness of pixel (i, j);

[0078] It should be noted that the matrix F can now be used to guide the dot engraving during the printing process. During printing, the positions corresponding to the elements with a value of 1 in the matrix will be engraved into dots that can receive ink, while the positions corresponding to the elements with a value of 0 will not be engraved and therefore will not receive ink.

[0079] When the image in the printing color plate is a dot image and a background image, printing is performed according to the printing color plate, wherein the background image is generated by images in different printing color plates, the dot image is printed through a dot color plate or a grayscale layer, and the image in the printing color plate is printed through grayscale dots.

[0080] In the typesetting system, the printing typesetting parameters are set according to the printing process flow, the priority during printing is determined, and the background of the image is calculated by the following formula:

[0081] Among them, C is the dot image, O is the background image, E is the image area, and D is the dot density.

[0082] Printing is performed according to the following calculation formula:

[0083] D={D1,D2,…,Dn}

[0084] Among them, D1, D2, ..., Dn represent the dot density of each printing color plate respectively, which is the dot density corresponding to the image.

[0085] Sculpting is done using the following formula:

[0086] C1=C1 k+C2×C2k+C3×C3k+…+Cn×CnK

[0087] Wherein, C1 k is the dot area ratio of the kth dot in the first dot color version, and n is the number of dot color versions;

[0088] S(i, j) is the grayscale value corresponding to the jth dot in the i-th adjacent dot color version.

[0089] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. The printing process of the confidential printing system is characterized by: The following steps are involved: S1. Select a printing device according to the printing demand, and the control module of the printing device obtains the maximum printing volume and printing timing of the printing device according to the printing parameter list stored in the storage module, and calculates the optimal typesetting method; S2. Generate a typesetting file for printing according to the optimal typesetting method; the typesetting file includes printing typesetting parameters and printing color plates in order, the printing typesetting parameters include corresponding printing tensors and printing timing, and the printing color plates include halftone images and image backgrounds; S3. Send the printing typesetting parameters and printing color plates to the printing system, and the printing system calculates the corresponding printing tensors and printing timing according to the printing typesetting parameters and typesets them; S4. Converting the printing color plate into printing parameters recognizable by a printing device, sending the printing parameters to the printing device, and the printing device obtaining a corresponding image in the printing color plate and printing according to the printing parameters; When the image in the printing color plate is a dot image, the data corresponding to the image is converted into dot tone values, and dot engraving is performed according to the dot tone values; when the image in the printing color plate is a background image, a line grid shadow is generated according to the data corresponding to the image.

2. The printing process of the confidential printing system according to claim 1, characterized in that: In step S4, when the image in the printing color plate is a halftone image, it is converted into a halftone tone value by the following formula: Among them, h is the dot tone value, Tc is the dot ink coverage, c = red, black, magenta, yellow, or cyan, black, magenta, light cyan, light black, or light red; Yo is the background ink coverage, and DWM is the dot engraving depth.

3. The printing process of the confidential printing system according to claim 2, characterized in that: In step S4, when printing is performed according to the dot tone value, a halftone engraving machine is used to perform dot engraving, and the halftone engraving machine is used to receive digital signals and perform engraving.

4. The printing process of the confidential printing system according to claim 1, characterized in that: In step S4, when the image in the printed color plate is a background image, it is calculated by the following formula: S(i,j)=D(i,j)*F(i,j) wherein (i,j) represents the position coordinates of the pixel point, S(i,j) is the grayscale value of the pixel (i,j), D(i,j) is the brightness of the pixel (i,j), and F(i,j) is the pixel value of the pixel (i,j); the brightness D(i,j) is calculated by the following formula: D(i,j)={0.5×[D(i-1,j)+D(i+1,j)+D(i,j-1)+D(i,j+1)]+D(i,j)}×0.25 wherein the pixel value F(i,j) is 0 or 1.

5. The printing process of the confidential printing system according to claim 4, characterized in that: In step S4, a dot matrix is ​​established according to the calculation result, and the dot matrix is ​​1 or 0; the dot depth of the image is calculated according to the dot matrix, and engraving is performed according to the dot depth of the image. After engraving, printing is performed according to the dot matrix.

6. The printing process of the confidential printing system according to claim 1, characterized in that: In step S4, when the image in the printing color plate is a background image, the background image is split into multiple sub-blocks according to the pixel values ​​and a dot matrix is ​​established, and the dot matrix is ​​1 or 0; the dot depth of the image is calculated according to the dot matrix, and engraving is performed according to the dot depth of the image. After engraving, printing is performed on the machine according to the dot matrix.

7. The printing process of the confidential printing system according to claim 5 or 6, characterized in that: The printing equipment includes scanning grayscale, hue, saturation, engraving dots, printing on the machine, and calculating the dot depth by the following formula: DW(i,j)=α×(255-D(i,j)) / 255 Among them, DW is the dot depth, D(i,j) is the brightness of the pixel, and α is the dot complex factor.

8. The printing process of the confidential printing system according to claim 1, characterized in that: In step S4, when the image in the printing color plate is a dot image, grayscale dots corresponding to the dot image are generated by grayscale value calculation, the grayscale dots are registered by a rubber roller registration device, engraved according to the grayscale dots, and after engraving, printing is performed on the machine according to the grayscale dots.

9. The printing process of the confidential printing system according to claim 1, characterized in that: In step S4, when the image in the printing color plate is a dot image, if the image in the printing color plate is composed of two-color images, the plate is aligned through a rubber roller alignment device to generate a two-color dot image, and the printing equipment engraves according to the two-color dot image, and after engraving, it is printed on the engraving machine.

10. The printing process of the confidential printing system according to claim 1, characterized in that: In step S1, the printing layout parameters include: single-sided printing tensor A, single-sided printing timing a, double-sided printing tensor B, double-sided printing timing b, three-sided printing tensor C, three-sided printing timing c, and the optimal layout method includes single-sided printing, double-sided printing and three-sided printing; the above parameters are calculated according to the following formula: when the printing tensor is less than A, the printing layout parameters correspond to single-sided printing; when A≤printing tensor<B, the printing layout parameters correspond to double-sided printing; otherwise when B≤printing tensor<C, the printing layout parameters correspond to double-sided printing; otherwise, D is the dot density, the difference between B and A is at least 20%, and the difference between B and C is at least 20%, d∈(0,0.5], e∈(0,0.5]; when b=1, the printing device performs positive printing, and when b=0, the printing device performs back printing.

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