阅读说明：本技术 基于三维建模的多面拼接印制品印制模拟系统 (Multi-surface spliced printed matter printing simulation system based on three-dimensional modeling ) 是由 刘勤勤 于 2021-09-02 设计创作，主要内容包括：本发明涉及印制技术领域,具体地说,涉及基于三维建模的多面拼接印制品印制模拟系统。其包括三维建模单元、印制品建模单元、多面拼接模拟单元和模拟结果输出单元,其中：所述三维建模单元用于构建三维印制面；所述印制品建模单元用于构建印制面上附着的印制品。本发明中根据对应标记的拼接点对印制品的工作面进行拉伸,以使对应标记的拼接点连接,然后形成调节参数,通过该调节参数对印制品模型进行调节,使附着后印制面上的印制品拼接点对应连接,而且拼接点为色变接点,以提高拼接点提取的精确度,从而实现在不平整面上进行印制品的模拟修整,以保证在实际印制时的完整性。(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.)

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;

and the simulation result output unit (400) is used for outputting the adjusting parameters generated by the printed product adjusting module (340) outwards.

2. The three-dimensional modeling based multi-sided stitching print printing simulation system according to claim 1, wherein: 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:

；

wherein the content of the first and second substances,to be at the effective focal lengthCoordinates of the lower characteristic points;to be at the effective focal lengthCoordinates of the lower characteristic points;is composed ofLower feature point coordinates anda 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.

3. The system for simulating printing of a multi-sided stitched print based on three-dimensional modeling according to claim 2, wherein: the printed matter modeling unit (200) adopts a python algorithm to draw the printed matter to form a printed matter model.

4. The system for simulating printing of a multi-sided stitched print based on three-dimensional modeling according to claim 3, wherein: the printed matter includes an engraved printed matter, a sprayed printed matter, a laser scanning printed matter, and a pasted printed matter.

5. The three-dimensional modeling based multi-sided stitching print printing simulation system according to claim 1, wherein: 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).

6. The system for simulating printing of a multi-surface stitched print based on three-dimensional modeling according to any one of claims 2 to 5, 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.

7. The system for simulating printing of a multi-sided stitched print based on three-dimensional modeling according to claim 6, wherein: the splice point is a color change point.

8. The system for simulating printing of a multi-sided stitched print based on three-dimensional modeling according to claim 6, wherein: the curve fitting feature extraction algorithm has the following algorithm formula:

；

wherein the content of the first and second substances,for printing surfacesIs spotted onCoordinates on an axis;for printing surfacesIs spotted onCoordinates on an axis;for printing surfacesIs spotted onCoordinates on an axis;is a gray scale;is a pixel inCoordinates on an axis;is a pixel inCoordinates on an axis;is a pixel inCoordinates on an axis;is an offset;is an error vector.

9. The system for simulating printing of a multi-sided stitched print based on three-dimensional modeling according to claim 6, 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.

10. 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.

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:

；

wherein the content of the first and second substances,to be at the effective focal lengthCoordinates of the lower characteristic points;to be at the effective focal lengthCoordinates of the lower characteristic points;is composed ofLower feature point coordinates anda 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:

；

wherein the content of the first and second substances,for printing surfacesIs spotted onCoordinates on an axis;for printing surfacesIs spotted onOn-axis seatMarking; for printing surfacesIs spotted onCoordinates on an axis;is a gray scale;is a pixel inCoordinates on an axis;is a pixel inCoordinates on an axis;is a pixel inCoordinates on an axis;is an offset;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:

；

wherein the content of the first and second substances,to be at the effective focal lengthCoordinates of the lower characteristic points;to be at the effective focal lengthCoordinates of the lower characteristic points;is composed ofLower feature point coordinates andlinearly 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 modelHere, the feature point coordinates refer to the coordinates of the model in the initial plane and then in the effective focal lengthAnd effective focal lengthThe 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:

；

wherein the content of the first and second substances,for printing surfacesIs spotted onCoordinates on an axis;for printing surfacesIs spotted onCoordinates on an axis; is composed ofOf printing surfacesIs spotted onCoordinates on an axis;is a gray scale; is composed ofIs provided with a pixelCoordinates on an axis;is a pixel inCoordinates on an axis;is a pixel inCoordinates on an axis;is an offset;is an error vector;

the working principle is as follows:

firstly, the methodIs an offset sumA constant parameter calculated for the error vector from the grey value, preferably the parameter is ，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-planeTo do soThe coordinate points in the reference plane, that is, all non-plane coordinates are obtained from the reference plane, so as to analyze the degree of protrusion or recession of the three-dimensional printed surface, then the position of the color change point is obtained from the gray value of the printed matter (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 the electricity is the color change point), then the position of the color change point in the non-plane coordinates is obtained, and the position is the shifted position, so that the coordinates are shifted (that is, the printed matter is stretched) to be connected with the adjacent plane by shifting the coordinates (that is, stretching the printed matter)The contact points of the surfaces are connected, and the translational distance is the adjustment 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.