CN113459660B - Multi-surface spliced printed matter printing simulation system based on three-dimensional modeling - Google Patents

Multi-surface spliced printed matter printing simulation system based on three-dimensional modeling Download PDF

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CN113459660B
CN113459660B CN202111024118.4A CN202111024118A CN113459660B CN 113459660 B CN113459660 B CN 113459660B CN 202111024118 A CN202111024118 A CN 202111024118A CN 113459660 B CN113459660 B CN 113459660B
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printed
printing
splicing
coordinates
points
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CN113459660A (en
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刘勤勤
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Shenzhen Chuangbo Future Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00—Printing machines of special types or for particular purposes
    • B41P2217/50—Printing presses for particular purposes

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  • Engineering & Computer Science (AREA)
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  • Theoretical Computer Science (AREA)
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Abstract

The invention relates to the technical field of printing, in particular to a multi-surface spliced printed matter printing simulation system based on three-dimensional modeling. The device comprises a three-dimensional modeling unit, a printed product modeling unit, a multi-surface splicing simulation unit and a simulation result output unit, wherein: the three-dimensional modeling unit is used for constructing a three-dimensional printing surface; the printed matter modeling unit is used for constructing printed matters attached to the printing surface. According to the method, the working surface of the printed product is stretched according to the splicing points of the corresponding marks so as to connect the splicing points of the corresponding marks, then the adjusting parameters are formed, the printed product model is adjusted through the adjusting parameters, the printed product splicing points on the printed surface after being attached are correspondingly connected, and the splicing points are color changing points so as to improve the accuracy of splicing point extraction, thereby realizing the simulated finishing of the printed product on the uneven surface and ensuring the integrity during actual printing.

Description

Multi-surface spliced printed matter printing simulation system based on three-dimensional modeling
Technical Field
The invention relates to the technical field of printing, in particular to a multi-surface spliced printed matter printing simulation system based on three-dimensional modeling.
Background
With the development of printing technology, printing and pasting or splicing are often adopted to finish packaging of a three-dimensional structure, for example, wallboard splicing and model outer surface sticker pasting during decoration, printed planes form an integral pattern through combination or splicing, but the model shape cannot be kept flat all the time, and printed products are often printed in a flat mode, so that during splicing, the pattern connection points of adjacent surfaces are deviated due to the convex or concave parts of the model, and the integral attractiveness is affected.
Disclosure of Invention
The invention aims to provide a multi-surface spliced printed matter printing simulation system based on three-dimensional modeling so as to solve the problems in the background technology.
In order to achieve the above object, the present invention provides a multi-surface stitching printed matter printing simulation system based on three-dimensional modeling, which includes a three-dimensional modeling unit, a printed matter modeling unit, a multi-surface stitching simulation unit, and a simulation result output unit, wherein:
the three-dimensional modeling unit is used for constructing a three-dimensional printing surface;
the printed matter modeling unit is used for constructing printed matters attached to a printing surface;
the multi-surface splicing simulation unit comprises a printed surface splitting module, a contact extraction module, a three-axis simulation analysis module and a printed product adjusting module; the three-axis type simulation analysis module is used for carrying out X, Y, Z axial fitting simulation analysis on the printed surface, specifically adopts a curved surface fitting characteristic extraction algorithm and sends a simulation analysis result to the printed product adjusting module, and the printed product adjusting module adjusts the printed product according to the simulation analysis result of the curved surface fitting characteristic extraction algorithm to form an adjusting parameter so that the printed product splicing points on the attached printed surface are correspondingly connected;
and the simulation result output unit is used for outputting the adjusting parameters generated by the printed product adjusting module outwards.
As a further improvement of the technical solution, the three-dimensional modeling unit adopts a stereoscopic vision modeling algorithm, and the algorithm steps are as follows:
firstly, calibrating the coordinates of the characteristic points of the three-dimensional printing surface, wherein the calculation formula is as follows:
Figure 879991DEST_PATH_IMAGE002
；
wherein the content of the first and second substances,
Figure 691827DEST_PATH_IMAGE003
to be at the effective focal length
Figure 440340DEST_PATH_IMAGE004
Coordinates of the lower characteristic points;
Figure 194800DEST_PATH_IMAGE005
to be at the effective focal length
Figure 370567DEST_PATH_IMAGE006
Coordinates of the lower characteristic points;
Figure 604452DEST_PATH_IMAGE007
is composed of
Figure 625498DEST_PATH_IMAGE004
Lower feature point coordinates and
Figure 749312DEST_PATH_IMAGE006
a linear solution of the lower feature points;
and then calculating the three-dimensional coordinates of the three-dimensional printing surface according to the characteristic points to obtain a printing surface model.
As a further improvement of the technical scheme, the printed matter modeling unit adopts a python algorithm to draw the printed matter to form a printed matter model.
As a further improvement of the technical scheme, the printed matter includes engraved printed matter, sprayed printed matter, laser scanning printed matter, and pasted printed matter.
As a further improvement of the technical solution, the system further comprises a model importing unit, wherein the model importing unit is used for importing the printed product model and the printed face model into the printed face splitting module.
As a further improvement of the technical solution, the contact extraction module comprises the following steps:
firstly, extracting a printed face model and splitting splicing points of printed products attached to a printed face, and then splicing and marking the extracted splicing points.
As a further improvement of the present technical solution, the splicing point is a color changing point.
As a further improvement of the technical solution, the algorithm formula of the curve fitting feature extraction algorithm is as follows:
Figure 581133DEST_PATH_IMAGE009
；
wherein the content of the first and second substances,
Figure 524818DEST_PATH_IMAGE010
for printing surfaces
Figure 349554DEST_PATH_IMAGE011
Is spotted on
Figure 842721DEST_PATH_IMAGE010
Coordinates on an axis;
Figure 94711DEST_PATH_IMAGE012
for printing surfaces
Figure 542004DEST_PATH_IMAGE011
Is spotted on
Figure 170432DEST_PATH_IMAGE012
On-axis seat
Figure 255456DEST_PATH_IMAGE013
Marking; for printing surfaces
Figure 678347DEST_PATH_IMAGE011
Is spotted on
Figure 596624DEST_PATH_IMAGE013
Coordinates on an axis;
Figure 513896DEST_PATH_IMAGE014
is a gray scale;
Figure 732387DEST_PATH_IMAGE015
is a pixel in
Figure 575447DEST_PATH_IMAGE010
Coordinates on an axis;
Figure 981021DEST_PATH_IMAGE016
is a pixel in
Figure 685672DEST_PATH_IMAGE012
Coordinates on an axis;
Figure 243823DEST_PATH_IMAGE017
is a pixel in
Figure 8517DEST_PATH_IMAGE013
Coordinates on an axis;
Figure 413304DEST_PATH_IMAGE018
is an offset;
Figure 921645DEST_PATH_IMAGE019
is an error vector.
As a further improvement of the technical scheme, the printed product adjusting module comprises the following adjusting steps:
firstly, the marked splicing points are extracted, and then the working surface of the printed product is stretched according to the correspondingly marked splicing points so as to connect the correspondingly marked splicing points.
As a further improvement of the technical scheme, the simulation result output unit comprises USB interface transmission, WIFi connection transmission and Bluetooth transmission.
Compared with the prior art, the invention has the beneficial effects that:
in this multiaspect concatenation printed matter printing analog system based on three-dimensional modeling, the working face of printed matter is stretched according to the concatenation point that corresponds the mark to make the concatenation point that corresponds the mark connect, then form the regulating parameter, adjust the printed matter model through this regulating parameter, make the printed matter concatenation point on the printed face after attaching correspond and connect, the concatenation point is the colour change point moreover, in order to improve the accuracy that the concatenation point drawed, thereby realize carrying out the simulation of printed matter and repairment on the not smooth face, in order to guarantee the integrality when actually printing.
Drawings
Fig. 1 is a block diagram of an overall structure module of embodiment 1 of the present invention;
fig. 2 is a schematic view of a printed product model and a printed surface model of embodiment 1 of the present invention;
fig. 3 is a schematic view of the working principle of the printed product adjustment module according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of an operating principle of the model importing unit according to embodiment 2 of the present invention.
The various reference numbers in the figures mean:
100. a three-dimensional modeling unit; 200. a printed matter modeling unit; 300. a multi-surface splicing simulation unit; 310. a printed surface splitting module; 320. a contact extraction module; 330. a triaxial analog analysis module; 340. a printed product adjusting module; 400. and a simulation result output unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The present invention provides a multi-surface spliced printed matter printing simulation system based on three-dimensional modeling, please refer to fig. 1-3, including a three-dimensional modeling unit 100, a printed matter modeling unit 200, a multi-surface spliced simulation unit 300 and a simulation result output unit 400, wherein:
the three-dimensional modeling unit 100 constructs a three-dimensional printing surface by using a stereoscopic vision modeling algorithm, which comprises the following steps:
firstly, calibrating the coordinates of the characteristic points of the three-dimensional printing surface, wherein the calculation formula is as follows:
Figure 114729DEST_PATH_IMAGE020
；
wherein the content of the first and second substances,
Figure 801057DEST_PATH_IMAGE021
to be at the effective focal length
Figure 915643DEST_PATH_IMAGE022
Coordinates of the lower characteristic points;
Figure 742523DEST_PATH_IMAGE023
to be at the effective focal length
Figure 524534DEST_PATH_IMAGE024
Coordinates of the lower characteristic points;
Figure 631030DEST_PATH_IMAGE025
is composed of
Figure 249224DEST_PATH_IMAGE022
Lower feature point coordinates and
Figure 99369DEST_PATH_IMAGE024
linearly solving the lower characteristic points, and calculating the three-dimensional coordinates of the three-dimensional printing surface according to the characteristic points to obtain a printing surface model;
the working principle is as follows: firstly, according to the characteristic point coordinates of the model
Figure 988084DEST_PATH_IMAGE026
Here, the feature point coordinates refer to the coordinates of the model in the initial plane and then in the effective focal length
Figure 265481DEST_PATH_IMAGE027
And effective focal length
Figure 620239DEST_PATH_IMAGE028
The two points are rotated by taking the axes as the axes, so that the conversion on a visual field is formed, a two-dimensional graph is formed by converting each angle, the rotation is started to rotate 360 degrees from the initial plane, and the final printed surface model is obtained by rotating the obtained two-dimensional graph.
Then the printed matter modeling unit 200 constructs a printed matter attached to the printing surface, wherein the printed matter can be drawn through Photoshop software or a python algorithm to form a printed matter model, the printed matter comprises an engraving printed matter, a spraying printed matter, a laser scanning printed matter, a pasting printed matter and the like, and it is worth explaining that the engraving printed matter refers to engraving on the three-dimensional printing surface through an engraving machine, the spraying printed matter and the laser scanning printed matter refer to performing spray painting or laser spray painting on the three-dimensional printing surface, and the pasting printed matter refers to fixing on the three-dimensional printing surface in a pasting mode;
the multi-surface splicing simulation unit 300 comprises a printed surface splitting module 310, a contact extraction module 320, a three-axis simulation analysis module 330 and a printed product adjusting module 340, and the working principle is as follows:
firstly, the printed surface splitting module 310 splits the three-dimensional printed surface, and the split rear contact extracting module 320 is used for extracting the splicing contact of the printed product on the spliced printed surface, and the specific steps are as follows:
firstly, extracting a printed surface model, splitting the spliced points of printed products attached to the printed surface, splicing and marking the extracted spliced points, carrying out X, Y, Z axial fitting simulation analysis on the printed surface by a triaxial simulation analysis module 330 after marking, and specifically adopting a curved surface fitting characteristic extraction algorithm, wherein the algorithm formula is as follows:
Figure 24807DEST_PATH_IMAGE029
；
wherein the content of the first and second substances,
Figure 781410DEST_PATH_IMAGE030
for printing surfaces
Figure 478977DEST_PATH_IMAGE031
Is spotted on
Figure 55452DEST_PATH_IMAGE030
Coordinates on an axis;
Figure 263710DEST_PATH_IMAGE032
for printing surfaces
Figure 874820DEST_PATH_IMAGE031
Is spotted on
Figure 759600DEST_PATH_IMAGE032
Coordinates on an axis; is composed of
Figure 69708DEST_PATH_IMAGE033
Of printing surfaces
Figure 65346DEST_PATH_IMAGE031
Is spotted on
Figure 281695DEST_PATH_IMAGE033
Coordinates on an axis;
Figure 337376DEST_PATH_IMAGE034
is a gray scale; is composed of
Figure 888443DEST_PATH_IMAGE035
Is provided with a pixel
Figure 937039DEST_PATH_IMAGE030
Coordinates on an axis;
Figure 257162DEST_PATH_IMAGE036
is a pixel in
Figure 968897DEST_PATH_IMAGE032
Coordinates on an axis;
Figure 7260DEST_PATH_IMAGE037
is a pixel in
Figure 344701DEST_PATH_IMAGE033
Coordinates on an axis;
Figure 37107DEST_PATH_IMAGE038
is an offset;
Figure 434590DEST_PATH_IMAGE039
is an error vector;
the working principle is as follows:
firstly, the method
Figure 429091DEST_PATH_IMAGE038
Is an offset sum
Figure 320955DEST_PATH_IMAGE039
A constant parameter calculated for the error vector from the grey value, preferably the parameter is
Figure 615670DEST_PATH_IMAGE040
，
Figure 167743DEST_PATH_IMAGE041
Then, the curve surface fitting characteristic extraction algorithm analyzes the curve surface characteristic points of each three-dimensional printing surface on the printing surface model, and then fitting is carried out to obtain coordinate points in a non-plane
Figure 180698DEST_PATH_IMAGE042
To do so
Figure 859941DEST_PATH_IMAGE043
The method comprises the steps of obtaining a reference plane, namely all coordinate points in the non-plane by the reference plane, analyzing the convex or concave degree of a three-dimensional printing plane, obtaining the position of a color change point through the gray value of a printed product (the color change point refers to an intersection point with color difference, for example, a point different from white on a white bottom surface, and electricity is the color change point), obtaining the position of the coordinate point of the color change point in the non-plane, wherein the position is the shifted position, translating the coordinate (namely stretching the printed product) to connect the coordinate with a contact of an adjacent plane, and the distance of translation is an adjusting parameter, so that a simulation analysis result is formed;
then, the formed simulation analysis result is sent to the printed product adjusting module 340, the printed product adjusting module 340 adjusts the printed product according to the simulation analysis result of the curved surface fitting feature extraction algorithm, and the printed product adjusting module 340 adjusts the steps as follows:
firstly, the marked splicing points are extracted, then the working surface of the printed product is stretched according to the corresponding marked splicing points so as to connect the corresponding marked splicing points, then adjustment parameters are formed, the printed product model is adjusted through the adjustment parameters so as to connect the printed product splicing points on the printed surface after being attached, finally, the adjustment parameters generated by the printed product adjusting module 340 are output outwards through the simulation result output unit 400, and the transmission of the simulation result output unit 400 comprises USB interface transmission, WIFi connection transmission and Bluetooth transmission.
In this embodiment, a description is given to a pasting manner, please refer to fig. 2, where a is a printed product model, and B1-B6 is a printed surface model, and since a connection between B1 and B2 is raised upward, as shown in fig. 3, a splicing point a1 of a paste a on a B2 surface is shifted to a11, and then the printed product adjusting module 340 obtains a parameter for shifting a11 to a1, and the splicing point is a color changing point, so as to improve accuracy of splicing point extraction, thereby implementing analog finishing of a printed product on an uneven surface to ensure integrity during actual printing.
Example 2
As shown in fig. 2, the printing simulation system further includes a model importing unit, where the model importing unit is configured to import the printed product model and the printed surface model into the printed surface splitting module 310, and meanwhile, the contact extracting module 320 directly extracts the splicing points of the printed product model, so as to enter the printed product model and the printed surface model in an importing manner, where the printed product model and the printed surface model are formed files, and the importing manner includes USB interface importing, WiFi importing, and the like, so as to provide a convenient manner for the formed files, and greatly improve simulation efficiency.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. A multi-surface spliced printed matter printing simulation system based on three-dimensional modeling is characterized in that: the device comprises a three-dimensional modeling unit (100), a printed product modeling unit (200), a multi-surface splicing simulation unit (300) and a simulation result output unit (400), wherein:
the three-dimensional modeling unit (100) is used for constructing a three-dimensional printing surface;
the printed matter modeling unit (200) is used for constructing printed matters attached to a printing surface;
the multi-surface splicing simulation unit (300) comprises a printed surface splitting module (310), a contact extraction module (320), a three-axis simulation analysis module (330) and a printed product adjusting module (340); the three-axis type simulation analysis module (330) is used for carrying out X, Y, Z axial fitting simulation analysis on the printed surface, specifically adopting a curved surface fitting characteristic extraction algorithm and sending a simulation analysis result to the printed product adjusting module (340), and the printed product adjusting module (340) adjusts the printed product according to the simulation analysis result of the curved surface fitting characteristic extraction algorithm to form an adjusting parameter so that the printed product splicing points on the attached printed surface are correspondingly connected;
the simulation result output unit (400) is used for outputting the adjusting parameters generated by the printed product adjusting module (340) outwards;
the three-dimensional modeling unit (100) adopts a stereoscopic vision modeling algorithm, and the algorithm steps are as follows:
firstly, calibrating the coordinates of the characteristic points of the three-dimensional printing surface, wherein the calculation formula is as follows:
Figure DEST_PATH_IMAGE001
；
wherein the content of the first and second substances,
Figure DEST_PATH_IMAGE002
to be at the effective focal length
Figure DEST_PATH_IMAGE003
Coordinates of the lower characteristic points;
Figure DEST_PATH_IMAGE004
to be at the effective focal length
Figure DEST_PATH_IMAGE005
Coordinates of the lower characteristic points;
Figure DEST_PATH_IMAGE006
is composed of
Figure 857113DEST_PATH_IMAGE003
Lower feature point coordinates and
Figure DEST_PATH_IMAGE007
a linear solution of the lower feature points;
then, calculating the three-dimensional coordinates of the three-dimensional printing surface according to the characteristic points to obtain a printing surface model;
the printed matter modeling unit (200) adopts a python algorithm to draw the printed matter to form a printed matter model;
the printed products comprise carving printed products, spraying printed products, laser scanning printed products and pasting printed products;
the model importing device further comprises a model importing unit, and the model importing unit is used for importing the printed product model and the printed face model into the printed face splitting module (310).
2. The three-dimensional modeling based multi-sided stitching print printing simulation system according to claim 1, wherein: the contact extraction module (320) comprises the following steps:
firstly, extracting a printed face model and splitting splicing points of printed products attached to a printed face, and then splicing and marking the extracted splicing points.
3. The system for simulating printing of a multi-sided stitched print based on three-dimensional modeling according to claim 2, wherein: the splice point is a color change point.
4. The system for simulating printing of a multi-sided stitched print based on three-dimensional modeling according to claim 2, wherein: the curve fitting feature extraction algorithm has the following algorithm formula:
Figure DEST_PATH_IMAGE008
；
wherein the content of the first and second substances,
Figure DEST_PATH_IMAGE009
for printing surfaces
Figure DEST_PATH_IMAGE010
Is spotted on
Figure DEST_PATH_IMAGE011
Coordinates on an axis;
Figure DEST_PATH_IMAGE012
for printing surfaces
Figure DEST_PATH_IMAGE013
Is spotted on
Figure DEST_PATH_IMAGE014
Coordinates on an axis;
Figure DEST_PATH_IMAGE015
for printing surfaces
Figure 210472DEST_PATH_IMAGE010
Is spotted on
Figure DEST_PATH_IMAGE016
Coordinates on an axis;
Figure DEST_PATH_IMAGE017
is a gray scale;
Figure DEST_PATH_IMAGE018
is a pixel in
Figure DEST_PATH_IMAGE019
Coordinates on an axis;
Figure DEST_PATH_IMAGE020
is a pixel in
Figure DEST_PATH_IMAGE021
Coordinates on an axis;
Figure DEST_PATH_IMAGE022
is a pixel in
Figure DEST_PATH_IMAGE023
Coordinates on an axis;
Figure DEST_PATH_IMAGE024
is an offset;
Figure DEST_PATH_IMAGE025
is an error vector.
5. The system for simulating printing of a multi-sided stitched print based on three-dimensional modeling according to claim 2, wherein: the printed matter adjusting module (340) comprises the following adjusting steps:
firstly, the marked splicing points are extracted, and then the working surface of the printed product is stretched according to the correspondingly marked splicing points so as to connect the correspondingly marked splicing points.
6. The three-dimensional modeling based multi-sided stitching print printing simulation system according to claim 1, wherein: the simulation result output unit (400) transmission comprises USB interface transmission, WIFi connection transmission and Bluetooth transmission.
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