CN108763663B - Printing system and method for automatically generating printing bleeding position and cutting line - Google Patents
Printing system and method for automatically generating printing bleeding position and cutting line Download PDFInfo
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- CN108763663B CN108763663B CN201810443864.9A CN201810443864A CN108763663B CN 108763663 B CN108763663 B CN 108763663B CN 201810443864 A CN201810443864 A CN 201810443864A CN 108763663 B CN108763663 B CN 108763663B
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Abstract
The invention discloses a method for automatically generating a printing bleeding position and a cutting line, which comprises the following steps: s1, acquiring a printing manuscript; s2, converting the printing manuscript into a bitmap manuscript and generating a contour line of the bitmap manuscript; s3, judging whether the bitmap manuscript contains bleeding positions according to the set printing size; if the bitmap manuscript contains bleeding positions, the outline is shrunk inwards according to the set expansion parameters to generate a cutting line; if the bitmap manuscript does not contain a bleeding position, executing step S4; s4, according to the set expansion parameters, carrying out external expansion on the contour lines to generate bleeding areas, and carrying out color and/or pattern filling on the bleeding areas to generate bleeding position documents, wherein the contour lines form cutting lines of the bleeding position documents; and S5, converting the bitmap manuscript with the cutting lines in the S3 or the bleeding bitmap manuscript in the S4 into a printing vector plate. The bleeding position is automatically generated, thereby improving the quality of the printed matter.
Description
Technical Field
The invention belongs to the technical field of printing industry, and particularly relates to a printing system and a method for automatically generating a printing bleeding position and a cutting line.
Background
The bleeding position refers to a part which is reserved for reserving effective contents of a picture and is convenient to cut when the picture is printed. The bleeding in printing refers to the pattern which enlarges the outer dimension of the product, and the extension of some patterns is added at the cutting position, so that the product is specially used in each production process within the process tolerance range, and the cut finished product is prevented from exposing white edges or cutting the content. The design size is always larger than the finished product size, the larger edge is cut off after printing, and the part to be printed and cut off is called a bleeding part or a bleeding position.
The existing printed matter bleeding position is mainly manufactured by manpower; in contrast, the bleeding position of a printed matter with simple patterns and less color combinations is simpler to manufacture, but the high requirements of people on appearance are continuously increased, the complexity of the patterns and colors of the printed matter is high, such as landscapes and gradient graphs, and the like, the bleeding position of the printed matter is large in manufacturing workload, complicated steps and time consumption, and low efficiency is caused. In addition, in the process of manufacturing the bleeding position, the influence of subjective factors is large, and the effects of operators with different experiences are different. Because the absolute color value and human sense are still greatly different, the manufacturing of the bleeding position cannot necessarily achieve the best effect, and the quality of the cut printing finished product is not satisfactory.
Disclosure of Invention
The invention aims to solve the technical problems of low bleeding position efficiency and low quality of a manually manufactured printed matter, and provides a printing system and a method for automatically generating a printing bleeding position and a cutting line with high automation degree.
In order to solve the problems, the invention is realized according to the following technical scheme:
the invention discloses a method for automatically generating a printing bleeding position and a cutting line, which comprises the following steps:
s1, acquiring a printing manuscript;
s2, converting the printing manuscript of S1 into a bitmap manuscript and generating an outline of the bitmap manuscript;
s3, judging whether the bitmap manuscript contains bleeding positions according to the set printing size; if the bitmap manuscript contains bleeding positions, the outline is shrunk inwards according to the set expansion parameters to generate a cutting line; if the bitmap manuscript does not contain a bleeding position, executing step S4;
s4, expanding the contour line of S2 to generate a bleeding area according to the preset expansion parameters, and filling the bleeding area with colors and/or patterns to generate a bleeding position document, wherein the contour line of S2 forms a cutting line of the bleeding position document;
and S5, converting the bitmap manuscript with the cutting lines in the S3 or the bleeding bitmap manuscript in the S4 into a printing vector plate.
Further, the step of generating a bleeding position manuscript from the position map manuscript in the step S4 specifically includes the following steps:
s41, identifying the contour line in S2, performing equidistant outward expansion on the contour line according to expansion parameters to form a bleeding line, wherein a bleeding area is formed by the bleeding line and an area between the contour line and the contour line;
and S42, analyzing the color block composition of the bitmap manuscript, and filling the color and/or the pattern of the bleeding position to generate the bleeding position manuscript.
Further, the converting the bitmap manuscript to generate the bitmap manuscript and the contour line in S2 specifically includes the following steps:
s21, identifying and classifying the pixel units of the printing manuscript, collecting the same and continuous pixel units, and dividing a plurality of pixel groups on the bitmap manuscript;
s22, converting the pixel group into color block bitmaps, and forming a bitmap manuscript by a plurality of color block bitmaps; and identifying the outer edge of the bitmap manuscript to generate a contour line through the color contrast of the bitmap manuscript and the background.
Further, in S3, it is identified whether the bitmap document includes a bleeding position, and the bitmap document is matched with the contour line in S2 according to the set print size; if the contour line is matched with the printing size, judging that the printing manuscript does not contain a bleeding position; if the contour line is larger than the printing size, the printing manuscript is judged to contain the bleeding position.
Further, the analyzing of the color patch composition of the bitmap document at S42 and the filling of the color and/or pattern of the bleeding site specifically include the following steps:
s421, according to the expansion parameters, carrying out equidistant retraction on the contour line of the bitmap manuscript inwards to form a color taking line, wherein a color taking area for analysis is formed by the area between the color taking line and the contour line;
s422, analyzing the color block composition of the color taking area, comparing the color block composition with a preset color block number threshold value, and selecting a filling mode of a bleeding area; if the composition of the color blocks is not higher than the threshold value of the number of the color blocks, carrying out mirror image filling, wherein the mirror image filling takes the contour line as a symmetry axis, and copying the colors of the color taking area in a mirror image manner to fill a bleeding area so as to generate a bleeding position manuscript; if the color block composition is higher than the color block number threshold value, executing S423;
s423, analyzing color block composition of the color taking area, and carrying out simulated color filling by combining the whole color block composition of the bitmap manuscript; the simulation comprises gradual change simulation, arrangement rule simulation and scene class identification simulation, and then high-matching simulation colors and simulation patterns are filled in the bleeding position to generate the bleeding position manuscript.
Further, the extended parameters comprise automatic parameters and setting parameters; the automatic parameters are default extended parameters of the system, and the distance between bleeding positions is 1-5 mm; the set parameters are expansion parameters set by a user; and automatically generating a cutting line, a bleeding line and a color taking line according to the automatic parameters or the set parameters.
A printing system for automatically generating a print bleed and trim line, comprising:
an input module: for receiving or scanning a printed document;
a conversion module: the bitmap generation device is used for converting a printing manuscript into a bitmap manuscript and generating a contour line of the bitmap manuscript;
a judging module: the judging module is used for matching the printing size with the contour line and judging whether the printing manuscript contains a bleeding position;
an expansion module: for setting print size and expansion parameters; if the judgment module identifies that the bitmap manuscript contains bleeding positions, the expansion module generates the bitmap manuscript containing the cutting lines; if the judgment module identifies that the bitmap manuscript does not contain a bleeding position, the expansion module generates the bitmap manuscript comprising a cutting line, a bleeding area and a color taking area;
an analysis filling module: acquiring a bitmap manuscript of an expansion module, wherein the bitmap manuscript comprises a cutting line, a bleeding area and a color taking area; analyzing the color composition of the color taking area, and filling colors and/or patterns in the bleeding area to generate a bleeding position manuscript;
an output module: acquiring a bitmap manuscript only containing cutting lines, and converting the bitmap manuscript into a printing vector plate; and the output module acquires the bleeding position manuscript and converts the bleeding position manuscript into a printing vector plate.
Further, for a high matching of the bleeding position to the printed picture, the analysis filling module comprises:
a second recognition unit: a bleeding area and a coloring area for identifying the expansion module;
a threshold value setting unit: the number threshold value is used for setting the color blocks;
color block analysis unit: the color block composition analysis unit is used for analyzing the color block composition of the color taking area and comparing the color block composition with the number threshold of the color blocks of the threshold setting unit; if the color block composition is not higher than the number threshold of the color blocks, outputting a filling signal of mirror image simulation; if the color block composition is higher than the threshold value of the number of the color blocks, outputting an analog signal;
an analog simulation unit: receiving an analog signal of a color block analysis unit, analyzing by combining the whole color block composition of the bitmap manuscript and the color block composition of the color taking region, performing analog simulation of the color block, and outputting an analog filling signal;
a filling unit: the method comprises the steps of receiving a filling signal of mirror image simulation of a color block analysis unit, and filling a bleeding area by mirror image simulation; the artificial simulation filling device receives an artificial simulation filling signal of the artificial simulation unit and carries out artificial simulation filling on a bleeding area.
Through the design, the color block analysis unit effectively analyzes the color block composition of the color taking area, judges the complexity of a printed picture, and generates a mirror image simulation filling signal to output if the color block composition is simple; furthermore, if the image is composed of complex color blocks, the simulation unit is used for performing simulation by combining the color-taking region color block composition and the image information of the whole color and/or pattern of the printed image, so that the high matching between the bleeding position and the printed image is improved and the quality of the printed image is improved while the printing system efficiently processes the image.
Further, the mirror image simulation takes the contour line as a symmetry axis, and the color of the color taking area is copied by the mirror image to fill the bleeding area;
the simulation is color simulation which is analyzed by combining the whole color block composition of the bitmap manuscript and the color block composition of the color taking area, and comprises gradual change simulation, arrangement rule simulation and scene class identification simulation, so that the bleeding area is filled with simulation colors and simulation patterns.
Furthermore, in order to set corresponding bleeding position expansion parameters according to the actual situation of the printed picture, high-quality color copies are generated, and the production efficiency is improved; the expansion module includes:
a parameter unit: the automatic parameter storage device is used for storing automatic parameters with the bleeding position spacing of 1-5 mm, and the automatic parameters are default extended parameters of a system;
a setting unit: the setting unit is used for setting the setting parameters, and the user can automatically adjust the actual values of the expansion parameters according to actual needs;
a first recognition unit: for identifying the contour of the vector bitmap;
an extension unit: if the judgment module identifies that the bitmap manuscript does not contain bleeding positions, the extension unit performs equidistant retraction on the outline line on the bitmap manuscript according to the extension parameters to generate a cutting line, and further generates the bitmap manuscript containing the cutting line; if the bitmap manuscript contains a bleeding position, the expanding unit performs equidistant external expansion on the outline of the bitmap manuscript according to the expanding parameters to generate a bleeding area, and performs equidistant internal contraction on the outline of the bitmap manuscript to form a color taking area;
the expansion unit is used for expanding the bleeding line, the color line and the cutting line by taking the set parameters of the setting unit as the first choice and taking the automatic parameters of the parameter unit as the second choice.
Through the design, the system for automatically generating the bleeding position of the printed matter can simulate the outline of the printed matter with complex outline to perform outward expansion of the bleeding position, further reduce the generation area of the bleeding position, reduce the printing area and the printing cost and simultaneously improve the printing quality; meanwhile, a color taking area is generated by equidistant retraction, and analysis of color block composition is carried out in the color taking area to carry out matched height simulation.
Compared with the prior art, the invention has the beneficial effects that:
the printing system for automatically generating the printing bleeding position and the cutting line can automatically analyze information such as patterns and colors on the printed matter, automatically generate the bleeding position and the cutting line matched with the printed matter, replace the identification of the manually-made bleeding position and the cutting line, and improve the printing work efficiency.
Meanwhile, for complex printed matters such as color patterns and the like, the information of the pictures is identified and analyzed through the system, the manufacture of the bleeding position is more efficient compared with manual manufacture, and the matching effect of the bleeding position and the printed matters is improved greatly compared with manual work, so that the quality of the printed matters is improved. The system for automatically generating the bleeding position of the printed matter can simulate the outline of the printed matter with complex outline to expand the bleeding position, and compared with manual manufacturing, the system reduces the generation area of the bleeding position, further reduces the printing area and the printing cost and improves the printing quality.
Drawings
Embodiments of the invention are described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a component of a printing system of the present invention for automatically generating printed bleed and trim lines;
in the figure: 1-input module, 2-conversion module, 3-judgment module, 4-expansion module, 41-parameter unit, 42-setting unit, 43-first identification unit, 44-expansion unit, 5-analysis filling module, 51-second identification unit, 52-threshold setting unit, 53-color block analysis unit, 54-simulation unit, 55-filling unit and 6-output module.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The invention discloses a method for automatically generating a printing bleeding position and a cutting line, which comprises the following steps:
and S1, acquiring the printing manuscript.
S2, converting the printing manuscript of the S1 into a bitmap manuscript, and generating an outline of the bitmap manuscript:
s21, identifying and classifying the pixel units of the printing manuscript, collecting the same and continuous pixel units, and dividing a plurality of pixel groups on the bitmap manuscript;
s22, converting the pixel group into color block bitmaps, and forming a bitmap manuscript by a plurality of color block bitmaps; and identifying the outer edge of the bitmap manuscript through the color contrast of the bitmap manuscript and the background so as to generate a contour line.
S3, judging whether the bitmap manuscript contains bleeding positions according to the set printing size; if the bitmap manuscript contains bleeding positions, the outline is shrunk inwards according to the set expansion parameters to generate a cutting line; if the bitmap document does not include a bleeding position, step S4 is executed.
In S3, it is identified whether the bitmap document contains a bleeding position, and it is matched with the contour line in S2 according to the set print size; if the contour line is matched with the printing size, judging that the printing manuscript does not contain a bleeding position; if the contour line is larger than the printing size, the printing manuscript is judged to contain the bleeding position.
S4, expanding the contour line of S2 to generate a bleeding area according to the preset expansion parameters, and filling the bleeding area with colors and/or patterns to generate a bleeding position document, wherein the contour line of S2 forms a cutting line of the bleeding position document;
s41, identifying the contour line in S2, performing equidistant outward expansion on the contour line according to expansion parameters to form a bleeding line, wherein a bleeding area is formed by the bleeding line and an area between the contour line and the contour line;
s42, analyzing color block composition of the bitmap manuscript, filling colors and/or patterns in the bleeding position to generate the bleeding position manuscript:
s421, according to the expansion parameters, carrying out equidistant retraction on the contour line of the bitmap manuscript inwards to form a color taking line, wherein a color taking area for analysis is formed by the area between the color taking line and the contour line;
s422, analyzing the color block composition of the color taking area, comparing the color block composition with a preset color block number threshold value, and selecting a filling mode of a bleeding area; if the composition of the color blocks is not higher than the threshold value of the number of the color blocks, carrying out mirror image filling, wherein the mirror image filling takes the contour line as a symmetry axis, and copying the colors of the color taking area in a mirror image manner to fill a bleeding area so as to generate a bleeding position manuscript; if the color block composition is higher than the color block number threshold value, executing S423;
s423, analyzing color block composition of the color taking area, and carrying out simulated color filling by combining the whole color block composition of the bitmap manuscript; the simulation comprises gradual change simulation, arrangement rule simulation and scene class identification simulation, and then high-matching simulation colors and simulation patterns are filled in the bleeding position to generate the bleeding position manuscript.
The extended parameters comprise automatic parameters and setting parameters; the automatic parameters are default extended parameters of the system, and the distance between bleeding positions is 1-5 mm; the set parameters are expansion parameters set by a user; and automatically generating a cutting line, a bleeding line and a color taking line according to the automatic parameters or the set parameters.
And S5, converting the bitmap manuscript with the cutting lines in the S3 or the bleeding bitmap manuscript in the S4 into a printing vector plate. And (4) conveying the printing vector plate to a printing unit and a cutting unit, and entering subsequent printing production.
The extended parameters comprise automatic parameters and setting parameters; the automatic parameters are default extended parameters of the system, and the distance between bleeding positions is 1-5 mm; the set parameters are expansion parameters set by a user; and automatically generating the bleeding position according to the automatic parameters or the set parameters.
As shown in fig. 1, the printing system for automatically generating a printing bleed position and a trimming line according to the present invention comprises:
an input module 1: for receiving or scanning the printed document.
A conversion module 2: which is used to convert the print to a bitmap document and generate the outline of the bitmap document.
A judging module 3: the judging module 3 is used for matching the printing size with the contour line and judging whether the printing manuscript contains a bleeding position.
The expansion module 4: for setting print size and expansion parameters; if the judgment module 3 identifies that the bitmap manuscript contains bleeding positions, the expansion module 4 generates the bitmap manuscript containing cutting lines; if the judgment module 3 identifies that the bitmap manuscript does not contain a bleeding position, the expansion module 4 generates the bitmap manuscript comprising a cutting line, a bleeding area and a color taking area.
The analysis and filling module 5: acquiring a bitmap manuscript of an expansion module 4, wherein the bitmap manuscript comprises a cutting line, a bleeding area and a color taking area; and analyzing the color composition of the color taking area, and filling the bleeding area with simulated colors and/or patterns to generate the bleeding position manuscript.
An output module 6: acquiring a bitmap manuscript only containing cutting lines, and converting the bitmap manuscript into a printing vector plate; the output module 6 obtains the bleeding position manuscript and converts the bleeding position manuscript into a printing vector plate.
For a high degree of matching of the bleeding sites to the printed picture, the analysis and filling module 5 comprises:
the second recognition unit 51: for identifying the bleeding area and the color-picking area of the expansion module 4;
threshold setting unit 52: the number threshold value is used for setting the color blocks;
the patch analyzing unit 53: the color block composition analysis unit is used for analyzing the color block composition of the color taking area and comparing the color block composition with the number threshold of the color blocks of the threshold setting unit 52; if the color block composition is not higher than the number threshold of the color blocks, outputting a filling signal of mirror image simulation; if the color block composition is higher than the threshold value of the number of the color blocks, outputting an analog signal;
the simulation unit 54: receiving the analog signals of the color block analyzing unit 53, analyzing by combining the whole color block composition of the bitmap manuscript and the color block composition of the color taking region, performing analog simulation of the color blocks, and outputting analog filling signals;
filling unit 55: it receives the filling signal of the mirror image simulation of the patch analyzing unit 53, and performs the mirror image simulation filling on the bleeding area; which receives the filling signal of the simulation by the simulation unit 54 and performs simulation filling of the bleeding area.
In order to set corresponding bleeding position expansion parameters according to the actual condition of the printed picture, generate high-quality color copies and improve the production efficiency; the expansion module includes:
parameter unit 41: the automatic parameter storage device is used for storing automatic parameters with the bleeding position spacing of 1-5 mm, and the automatic parameters are default extended parameters of a system;
the setting unit 42: the setting unit 42 is used for setting the setting parameters, and the user can automatically adjust the actual values of the expansion parameters according to the actual requirements;
the first recognition unit 43: for identifying the contour of the vector bitmap;
the extension unit 44: if the judgment module identifies that the bitmap manuscript does not contain a bleeding position, the extension unit 44 performs equidistant retraction on the outline line on the bitmap manuscript according to the extension parameters to generate a cutting line, and further generates the bitmap manuscript containing the cutting line; if the bitmap manuscript contains a bleeding position, the expanding unit 44 performs equidistant external expansion on the outline of the bitmap manuscript according to the expanding parameters to generate a bleeding area, and performs equidistant internal contraction on the outline of the bitmap manuscript to form a color taking area;
the expansion unit 44 performs expansion of the bleeding line, the coloring line, and the cutting line with the setting parameters of the setting unit 42 as the first choice and the automatic parameters of the parameter unit 41 as the second choice.
Further, the mirror image simulation takes the contour line as a symmetry axis, and the color of the color taking area is copied in a mirror image mode to fill the bleeding area;
the simulation is color simulation which is analyzed by combining the whole color block composition of the bitmap manuscript and the color block composition of the color taking area, and comprises gradual change simulation, arrangement rule simulation and scene class identification simulation, so that the bleeding area is filled with simulation colors and simulation patterns.
Printing bleeding sites and trim lines example 1: the printed matter is a square business card with simple color composition, and the input module 1 scans the business card to identify and generate a large number of pixel units contained in the business card. . The conversion module 2 collects the same and continuous pixel units on the printed manuscript into pixel groups, converts all the pixel groups into a plurality of color block bitmaps, and the plurality of color block bitmaps form a bitmap manuscript; the outline of the bitmap document is generated by the color contrast between the bitmap document and the background.
The original size of the printed matter is input or scanned and identified through the judging module 3, and the printing size is generated; the judging module 3 matches the printing size with the contour line of the bitmap manuscript, and judges that the card contains a bleeding position and does not have the bleeding position.
Under the condition that the expansion parameters are not set by the expansion module 4, the outline of the bitmap manuscript is identified by the first identification unit 43 according to the automatic parameters of the parameter unit 4, the expansion unit 44 performs equidistant external expansion on the square outline of the business card for 3mm to form a bleeding position, and the 3mm inwards equidistant inward contraction on the outline forms a color taking area.
The threshold value setting unit 52 of the analysis filling module 5 sets the number threshold value of the color blocks; further, the second recognition unit 51 and the patch analysis unit 53 analyze patch compositions of the color sampling region in combination. At this time, by analyzing that the color patch composition of the color sampling region is less than the threshold value of the number of color patches, it is determined that the business card is a simple color patch composition, and the color patch analyzing unit 53 generates a filling signal of mirror image simulation. The mirror image simulation takes the contour line as a symmetry axis, and the color of the color taking area is copied in a mirror image mode to fill the bleeding area; if the name card is composed of a plurality of colors, boundary lines among the colors are linear, arc-shaped, regular broken lines, wavy lines and the like, the color block analysis unit 53 can analyze and identify the colors, and then generates a filling signal of mirror image simulation and outputs the filling signal to the filling unit 55 for filling the colors, so as to generate a bleeding position manuscript; and finally, converting the bleeding position manuscript into a printing vector plate by an output module 6.
Printing bleeding site and cutting line example 2: the printed matter is a square propaganda bill with gradually changed colors, and the color layout of the printed matter gradually changes from the center to the outer edge. An electronic version of the square leaflet (no bleeding bit) is input via the input module 1 and the large number of pixel units contained in the acquisition leaflet is identified. The conversion module 2 collects the same and continuous pixel units on the leaflet into pixel groups, converts all the pixel groups into a plurality of color block bitmaps, forms a bitmap manuscript by the plurality of color block bitmaps, and simultaneously generates an outer contour line of the bitmap manuscript.
The original size of the printed matter is input or scanned and identified through the judging module 3, and the printing size is generated; the judging module 3 matches the printing size with the contour line of the bitmap manuscript, judges that the square leaflet has a bleeding position and does not have the bleeding position.
Under the condition that the expansion parameters are not set by the expansion module 4, the outline of the bitmap manuscript is identified through the first identification unit 43 according to the automatic parameters of the parameter unit 41, the square outline of the leaflet is subjected to equidistant external expansion by 4mm to form a bleeding position through the expansion unit 44, and a color taking area is formed by 4mm in which the outline is inwards and equidistantly retracted.
The threshold value setting unit 52 of the analysis filling module 5 sets the number threshold value of the color blocks; further, the second recognition unit 51 and the patch analysis unit 53 analyze patch compositions of the color sampling region in combination. At this time, the business card is judged to be a complex color block composition by analyzing that the color block composition of the color sampling area is higher than the color block number threshold value, and the color block analysis unit 53 generates an analog signal to the analog simulation unit 54. The simulation unit 54 performs color simulation by analyzing the entire color block composition of the bitmap document and the color block composition of the color sampling region, and can automatically analyze the patterns and color compositions of the printed matter, such as gradual change of color, arrangement rule of combination of color and pattern, recognition of scenery, and the like, and further perform filling of simulation color and simulation pattern on the bleeding position.
In the declaration of color gradual change, the simulation unit 54 analyzes a plurality of color values of the gradual change trend of the same color to obtain a gradual change rule of the color, and then simulates the change of the color according to the gradual change rule; meanwhile, if the leaflet consists of a plurality of colors, the boundary line between the colors of the simulation unit 54 simulates the colors and/or patterns, generates a simulation filling signal and outputs the simulation filling signal to the filling unit 55 to fill the colors, and generates a bleeding position manuscript; and finally, converting the bleeding position manuscript into a printing vector plate by an output module 6.
The printing system distinguishes mirror image simulation and simulation which need to be carried out on the printed picture, efficiently processes the picture, simultaneously, intelligently analyzes the picture, compares manual processing, greatly improves the height matching of the bleeding position and the printed picture, and improves the quality of the printed picture.
The printing system and the method for automatically generating the printing bleeding position and the cutting line have the working principle that: the printing system converts the printing manuscript into the bitmap manuscript, and then carries out intelligent analysis on color and pattern information carried by the bitmap manuscript, realizes filling of simulated color, pattern and the like in the bleeding position, generates the bleeding position and the cutting line which are highly matched with the printed matter, reduces the elimination rate of the printed matter after cutting, and greatly improves the quality of the printed matter.
Other structures of the printing system and the method for automatically generating the printing bleeding position and the cutting line according to the present embodiment are shown in the prior art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (9)
1. A method for automatically generating a printing bleeding position and a cutting line is characterized by comprising the following steps:
s1, acquiring a printing manuscript;
s2, generating a bitmap manuscript according to the printing manuscript and generating a contour line of the bitmap manuscript;
s3, judging whether the bitmap manuscript contains bleeding positions according to the set printing size; if the bitmap manuscript contains bleeding positions, the outline is shrunk inwards according to the set expansion parameters to generate a cutting line; if the bitmap manuscript does not contain a bleeding position, executing step S4;
wherein, in the step S3, it is identified whether the bitmap document contains a bleeding position, and the bitmap document is matched with the contour line in the step S2 according to the set printing size; if the contour line is matched with the printing size, judging that the printing manuscript does not contain a bleeding position; if the contour line is larger than the printing size, judging that the printing manuscript contains a bleeding position;
s4, expanding the contour line of S2 to generate a bleeding area according to the preset expansion parameters, and filling the bleeding area with colors and/or patterns to generate a bleeding position document, wherein the contour line of S2 forms a cutting line of the bleeding position document;
and S5, converting the bitmap manuscript with the cutting lines in the S3 or the bleeding bitmap manuscript in the S4 into a printing vector plate.
2. The method for automatically generating a printing bleeding position and trimming line according to claim 1, wherein the step of generating a bleeding position manuscript from the bitmap manuscript of S4 comprises the following steps:
s41, identifying the contour line in S2, performing equidistant outward expansion on the contour line according to expansion parameters to form a bleeding line, wherein a bleeding area is formed by the bleeding line and an area between the contour line and the contour line;
and S42, analyzing the color block composition of the bitmap manuscript, and filling the color and/or the pattern of the bleeding position to generate the bleeding position manuscript.
3. The method for automatically generating printing bleeding positions and trimming lines according to claim 1, wherein the step of S2 for generating corresponding bitmap documents and their outlines according to the printing documents comprises the following steps:
s21, identifying and classifying the pixel units of the printing manuscript, collecting the same and continuous pixel units, and dividing a plurality of pixel groups on the bitmap manuscript;
s22, converting the pixel group into color block bitmaps, and forming a bitmap manuscript by a plurality of color block bitmaps; and identifying the outer edge of the bitmap manuscript to generate a contour line through the color contrast of the bitmap manuscript and the background.
4. The method for automatically generating a printing bleed position and trimming line according to claim 2, wherein the analyzing step S42 is to analyze the color block composition of the bitmap manuscript and fill the bleed position with color and/or pattern, and comprises the following steps:
s421, according to the expansion parameters, carrying out equidistant retraction on the contour line of the bitmap manuscript inwards to form a color taking line, wherein a color taking area for analysis is formed by the area between the color taking line and the contour line;
s422, analyzing the color block composition of the color taking area, comparing the color block composition with a preset color block number threshold value, and selecting a filling mode of a bleeding area; if the composition of the color blocks is not higher than the threshold value of the number of the color blocks, carrying out mirror image filling, wherein the mirror image filling takes the contour line as a symmetry axis, and copying the color of the color taking area in a mirror image manner to fill the bleeding area to generate a bleeding position manuscript; if the color block composition is higher than the color block number threshold value, executing S423;
s423, analyzing color block composition of the color taking area, and carrying out simulated color filling by combining the whole color block composition of the bitmap manuscript; the simulation comprises gradual change simulation, arrangement rule simulation and scene class identification simulation, and then high-matching simulation colors and simulation patterns are filled in the bleeding position to generate the bleeding position manuscript.
5. The method for automatically generating printed bleed sites and trim lines according to any of claims 1 to 4, wherein the extended parameters include automatic parameters and set parameters; the automatic parameters are default extended parameters of the system, and the distance between bleeding positions is 1-5 mm; the set parameters are expansion parameters set by a user; and automatically generating a cutting line, a bleeding line and a color taking line according to the automatic parameters or the set parameters.
6. A printing system for automatically generating a printing bleed position and trim line, comprising:
input module (1): for receiving or scanning a printed document;
conversion module (2): the bitmap generation device is used for converting a printing manuscript into a bitmap manuscript and generating a contour line of the bitmap manuscript;
a judging module (3): the judging module (3) is used for matching the printing size with the contour line and judging whether the printing manuscript contains a bleeding position;
the judging module (3) identifies whether the bitmap manuscript contains a bleeding position, and matches the bitmap manuscript with the contour line of the bitmap manuscript according to the set printing size; if the contour line is matched with the printing size, judging that the printing manuscript does not contain a bleeding position; if the contour line is larger than the printing size, judging that the printing manuscript contains a bleeding position;
expansion module (4): for setting print size and expansion parameters; if the judgment module (3) identifies that the bitmap manuscript contains bleeding positions, the expansion module (4) generates the bitmap manuscript containing the cutting lines; if the judgment module (3) identifies that the bitmap manuscript does not contain a bleeding position, the expansion module (4) generates the bitmap manuscript comprising a cutting line, a bleeding area and a color taking area;
analytical filling module (5): the method comprises the steps of obtaining a bitmap manuscript of an expansion module (4) comprising a cutting line, a bleeding area and a color taking area; analyzing the color composition of the color taking area, and filling colors and/or patterns in the bleeding area to generate a bleeding position manuscript;
output module (6): acquiring a bitmap manuscript only containing cutting lines, and converting the bitmap manuscript into a printing vector plate; and the output module (6) acquires the bleeding position manuscript and converts the bleeding position manuscript into a printing vector plate.
7. Printing system for the automatic generation of printed bleed sites and trim lines according to claim 6, characterized in that said analysis and filling module (5) comprises:
second recognition unit (51): for identifying the bleeding area and the color-picking area of the expansion module (4);
threshold setting unit (52): the number threshold value is used for setting the color blocks;
color block analysis unit (53): the color block composition of the color taking area is analyzed and compared with the number threshold of the color blocks of a threshold setting unit (52); if the color block composition is not higher than the number threshold of the color blocks, outputting a filling signal of mirror image simulation; if the color block composition is higher than the threshold value of the number of the color blocks, outputting an analog signal;
simulation unit (54): receiving an analog signal of a color block analysis unit (53), analyzing by combining the whole color block composition of the bitmap manuscript and the color block composition of the color taking area, performing analog simulation of the color block, and outputting an analog filling signal;
filling unit (55): the method comprises the steps of receiving a mirror image simulation filling signal of a color block analysis unit (53) and filling a bleeding area in a mirror image simulation mode; it receives a filling signal of the emulation unit (54) and carries out the emulation filling of the bleeding area.
8. The printing system for automatically generating printed bleed sites and trim lines according to claim 7,
the mirror image simulation takes the contour line as a symmetry axis, and the color of the color taking area is copied in a mirror image mode to fill the bleeding area;
the simulation is color simulation which is analyzed by combining the whole color block composition of the bitmap manuscript and the color block composition of the color taking area, and comprises gradual change simulation, arrangement rule simulation and scene class identification simulation, so that the bleeding area is filled with simulation colors and simulation patterns.
9. Printing system for the automatic generation of printed bleed sites and trim lines according to claim 6, characterized in that the expansion module (4) comprises:
parameter unit (41): the automatic parameter storage device is used for storing automatic parameters with the bleeding position spacing of 1-5 mm, and the automatic parameters are default extended parameters of a system;
setting unit (42): the setting unit (42) is used for setting the setting parameters, and the user can automatically adjust the actual values of the expansion parameters according to the actual requirements;
first recognition unit (43): for identifying the contour of the vector bitmap;
expansion unit (44): if the judgment module identifies that the bitmap manuscript does not contain bleeding positions, the extension unit (44) performs equidistant retraction on the outline line on the bitmap manuscript according to the extension parameters to generate a cutting line, and further generates the bitmap manuscript containing the cutting line; if the bitmap manuscript contains bleeding positions, an expansion unit (44) performs equidistant external expansion on the outline of the bitmap manuscript according to the expansion parameters to generate bleeding areas, and performs equidistant internal contraction on the outline of the bitmap manuscript to form color taking areas;
the expansion unit (44) performs expansion of the bleeding line, the coloring line and the cutting line with the setting parameters of the setting unit (42) as the first choice and the automatic parameters of the parameter unit (41) as the second choice.
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| CN111462009B (en) * | 2020-03-31 | 2023-04-07 | 上海大学 | Bleeding point prediction method based on similarity of divided rectangular areas |
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