Printed matter size measurement method, system and device and storage medium

Abstract

The invention provides a printed matter size measurement method, system and device and a storage medium, and the method comprises the steps: obtaining the image information of a printed matter, building a measurement model, then inserting the image information, determining the basic feature information of the printed matter, and enabling the basic feature information to at least comprise the boundary information of the printed matter and a plurality of pieces of gravure feature information; gravure coordinates of multiple pieces of gravure feature information on the printed matter and boundary coordinates in boundary information of the printed matter are obtained, distance information from the gravure coordinates to at least two boundary coordinates on the same side is determined, size information of a printing mold is obtained, size boundaries of the printing mold are expanded outwards according to the distance information, and the size boundaries of the printing mold are expanded outwards; according to the method, the size of the expanded printing mold is determined as the overall size of the printed matter, only the frame with the cutting error is measured, meanwhile, the fixed point features, such as gravure feature information and boundary information, in the frame of the printed matter serve as the same reference information, and the measurement error between the printed matter can be further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of printed matter measurement, and in particular to a printed matter size measurement method, system, measuring device and storage medium. Background Art

[0002] Printing (Graphic Arts, also known as Graphic Communications) is a technology that uses printing plate making, inking, and pressurization to transfer ink from text, pictures, photos, anti-counterfeiting manuscripts to the surface of paper, textiles, plastics, leather, PVC, PC and other materials to copy the original content in batches. Printing is the process of transferring the approved printing plate to the substrate through printing machinery and special ink.

[0003] During post-press processing, printed materials need to be cut into small products of specified sizes according to actual conditions. In order to detect the size of the cut products, small products are usually measured manually using transparent rulers or other measuring tools during daily production.

[0004] Existing manual measurement methods have many shortcomings. First, there are reading errors during measurement. Since different measurers use different measurement techniques, the measurement data of the same product are different. Second, there is the problem of the accuracy of the measuring tool. The general reading accuracy of the measuring ruler is 1mm, and if it is less than 1mm, the measurement personnel need to estimate. Therefore, the result cannot guarantee the authenticity of the data, and the measurement accuracy is poor. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a printed matter size measurement method, system, measuring device and storage medium, so as to fundamentally solve the problem of poor measurement accuracy in current measurement methods.

[0006] A method for measuring the size of a printed product according to an embodiment of the present invention comprises: Acquire image information of a printed product, and insert the image information after constructing a measurement model to determine basic feature information of the printed product, wherein the basic feature information at least includes boundary information of the printed product and a plurality of gravure feature information; Acquire the gravure coordinates of the plurality of gravure feature information on the printed matter, and the boundary coordinates in each boundary information of the printed matter, and determine the spacing information from the gravure coordinates to at least two boundary coordinates on the same side; The printing mold size information is obtained, the size boundary of the printing mold is expanded outward according to the spacing information, and the size of the expanded printing mold is determined as the overall size of the printed product.

[0007] Furthermore, the step of obtaining the gravure coordinates of the gravure feature information on the printed product and the boundary coordinates of each boundary of the printed product includes: The gravure coordinates of the four gravure feature information located around the printed product are obtained, and the boundary coordinates in the boundary information of at least four sides of the printed product are obtained, and according to the gravure coordinates, the shortest two adjacent boundaries along the X-axis and the Y-axis to the boundary coordinates are determined as the two boundaries on the same side of the gravure coordinates.

[0008] Furthermore, the step of determining the spacing information between the gravure coordinates and at least two boundary coordinate information on the same side includes: The coordinate distances from the gravure coordinates to the two boundary coordinates on the same side are respectively obtained, and a frame feature based on the gravure feature information is constructed according to the coordinate distances, and the frame feature is used as the distance information, and the frame feature at least includes the frame size.

[0009] Furthermore, the steps of obtaining image information of a printed product, inserting the image information after constructing a measurement model, and determining basic feature information of the printed product include: The printed product image information is acquired and a measurement model is constructed, a reference point is determined in the measurement model, and the image information is inserted into the measurement model by determining at least one edge point in the image information and according to the coincidence of the edge point with the reference point.

[0010] Furthermore, after the steps of acquiring the printed product image information and constructing a measurement model, determining reference points in the measurement model, acquiring edge points in the image information, and inserting the image information into the measurement model in a manner in which the edge points coincide with the reference points, the following steps are included: The reference point is used as the origin to establish coordinates, and the pixel coverage of the image information along the X-axis and Y-axis directions in the coordinates is obtained. According to the formula: Q*C, where Q is the pixel coverage range and C is the length conversion value corresponding to each pixel, the size information of the image information on the X-axis and Y-axis is determined respectively. A printed matter size measuring system according to an embodiment of the present invention comprises: An acquisition module, used for acquiring image information of a printed product, and constructing a measurement model to pre-process the image information to determine basic feature information of the printed product, wherein the basic feature information at least includes boundary information of the printed product and a plurality of gravure feature information; A coordinate measurement module, used for obtaining the gravure coordinates of the plurality of gravure feature information on the printed product and the boundary coordinates in each boundary information of the printed product, and determining the spacing information from the gravure coordinates to at least two boundary coordinates on the same side; The size calculation module is used to obtain the size information of the printing mold, expand the size boundary of the printing mold according to the spacing information, and determine the expanded size as the overall size of the printed product.

[0011] The present invention also provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor Implement the above-mentioned printed matter size measurement method.

[0012] The present invention also provides a printed matter size measuring device, the printed matter size measuring device comprising a computer device and a scanning device electrically connected to the computer device; The computer device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program; The scanning device comprises a connection platform electrically connected to the computer device, a scanning platform arranged on the connection platform, and a flattened top cover which is turned over and arranged on the scanning platform.

[0013] Furthermore, the flattening top cover includes a movable shaft movably connected to the scanning table, a fixed plate arranged on the side of the movable shaft away from the scanning table, a spring embedded in the fixed plate, a flat plate arranged on the side of the spring away from the fixed plate, and an adjusting bolt passing through both sides of the fixed plate to the flat plate.

[0014] Compared with the prior art: the printed product size measurement method in the above-mentioned embodiment of the present invention determines the basic feature information on the printed product, and based on the basic feature information such as the distance from the fixed-point gravure feature information to the boundary information on the same side, finally determines the border feature of the outer edge of the printed product, and then directly determines the size length of each side in the border feature through the pixel point parameters covered by the border feature in the measurement model, and uses it as the final comparison size between the printed products. By retaining the printed product parameters in the border feature, only the border with cutting errors is measured, and at the same time, the fixed-point features on the printed product located in the border, such as the gravure feature information and the boundary information, are used as the same reference information, which can further reduce the measurement error between the printed products and solve the problem of poor measurement accuracy in current measurement methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a flow chart of a method for measuring the size of printed matter in a first embodiment of the present invention; Figure 2 is a flow chart of a method for measuring the size of printed matter in a second embodiment of the present invention; Figure 3 is a schematic structural diagram of a printed matter size measuring system in a third embodiment of the present invention; Figure 4 is a schematic structural diagram of a printed matter size measuring device in a fourth embodiment of the present invention; Figure 5 Schematic diagram of the structural framework of a computer device in a printed matter size measuring device in a fourth embodiment of the present invention; Figure 6 It is a partial structural schematic diagram of a scanning device in a printed matter size measuring device in a fourth embodiment of the present invention; Figure 7 It is a schematic diagram of a partial cross-sectional structure of a flattened top cover in a printed matter size measuring device in a fourth embodiment of the present invention.

[0016] Description of main component symbols:

[0017] The following specific implementations will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] Embodiment 1 See also Figure 1 , shown is a method for measuring the size of printed matter in a first embodiment of the present invention, and the method shown specifically includes steps S01 to S03.

[0022] Step S01, acquiring image information of a printed product, and inserting the image information after constructing a measurement model to determine basic feature information of the printed product, wherein the basic feature information at least includes boundary information of the printed product and a plurality of gravure feature information.

[0023] In the specific implementation, the printed matter is scanned by a printed matter size measuring device, and the image information of the printed matter is collected and imported into a computer device. After the computer device constructs a measurement model, the image information of the printed matter is inserted into the measurement model. In some optional embodiments, the measurement model can be a two-dimensional metrology model, wherein the two-dimensional metrology model is a method for measuring the size and position of specific geometric shapes (such as circles, ellipses, rectangles and lines) in a two-dimensional image, including automatic measurement: the two-dimensional metrology model can automatically extract the edge information of the geometric shape to be measured from the image and perform size calculation, high precision: through image processing and optimization algorithms, the two-dimensional metrology model can provide high-precision size measurement results, flexibility: it is suitable for two-dimensional geometric bodies of various shapes and sizes, and can be adjusted and optimized according to specific needs, easy to integrate: it can be integrated with various image acquisition devices, software platforms and automation systems to achieve seamless docking and efficient operation. In addition, it should be noted that in order to ensure that there is a size error in data transmission, in the process of obtaining the image information of the printed matter through the measuring device, the pixel point area covered by the image information can be preliminarily obtained, and the constructed measurement model The resolution size of the model, that is, its pixel setting parameters need to be adapted to the pixel parameters of the printed product size measuring device, and the pixel coverage area of ​​the measured image information is inserted into the measurement model in a geometric ratio, and the same pixel coverage area is provided in the measurement model to ensure the accuracy of subsequent printed product measurement data. After that, when the image information is inserted into the measurement model, the basic feature information of the image information in the current printed product can be obtained through the measurement model, wherein the basic feature information at least includes the boundary information of the printed product and multiple gravure feature information. In some optional embodiments, the printed product can also be a banknote, and the surface of the banknote will print symbolic features, such as gravure, texture, crown number and other fixed feature information, and in the feature acquisition process, it can be respectively for the gravure feature, texture feature or crown number feature of the banknote to implement acquisition, and for the acquisition of the above features, it can be by importing the printing mold feature information of the applied printed product into the measurement model, and calibrating the printing mold feature information such as gravure feature, texture feature or crown number feature, and then comparing and querying the features in the image information according to the above calibration features and determining each feature information in the image information.

[0024] Step S02, obtaining the gravure coordinates of a plurality of gravure feature information on the printed matter and the boundary coordinates in each boundary information of the printed matter, and determining the spacing information from the gravure coordinates to at least two boundary coordinates on the same side.

[0025] It should be noted that specific intaglio features are provided at the four corners of the printed banknote, specifically at least one specific point in the intaglio features. Therefore, the intaglio coordinates of the specific points determined in the four intaglio feature information located around the printed product are obtained. In some optional embodiments, the four determined intaglio coordinates can be used as the origin coordinates for establishing a rectangular coordinate system, and the boundary coordinates in the boundary information of at least four sides of the printed product are obtained at the same time. Specifically, any two pairs of corners of the four corners of the printed banknote are determined as the origin of the rectangular coordinate system, and the four sides of the printed banknote are all in two sets of rectangular coordinate systems, thereby completing the acquisition and determination of the boundary coordinates of the four sides of the printed banknote. Subsequently, the intaglio coordinates can be determined to the same side according to the determined boundary coordinates and intaglio coordinates. That is, the coordinate spacing of the two closer boundaries, and constructing the border features based on the gravure feature information according to the coordinate spacing. It should be noted that since the banknotes need to be cut during the processing and production process, the banknote size error caused by cutting is reflected in the border features. The reason is that the banknote parts including the gravure features are uniformly printed through the same printing mold. It can be understood that there is no large error in this area. Therefore, the intuitive feature for judging the overall size error of the banknote is the border feature. After the border feature is obtained in the above operation, the size length of each side in the border feature can be directly determined according to the pixel point parameters covered by the border feature in the measurement model, and it can be used as the final comparison size between the banknotes, that is, the size error between each banknote can be reflected through the size of the border.

[0026] Step S03, obtaining the size information of the printing mold, expanding the size boundary of the printing mold according to the spacing information, and determining the expanded size as the overall size of the printed product.

[0027] Specifically, in some optional embodiments of the present invention, according to the need of size output results, the operator can determine the error size between each banknote based on the border size directly output in step S02, and can also retrieve the printing mold size information, and then use the border size length obtained in step S02 as a reference length, expand the edges of the printing mold size according to the reference length of each border to restore the overall size of the current printed product, and finally output the overall size of the printed product to facilitate data recording.

[0028] In summary, the printed product size measurement method in the above-mentioned embodiment of the present invention determines the basic feature information on the printed product, and based on the basic feature information such as the distance from the fixed-point gravure feature information to the boundary information on the same side, finally determines the border feature of the outer edge of the printed product, and then directly determines the size length of each side in the border feature through the pixel point parameters covered by the border feature in the measurement model, and uses it as the final comparison size between the printed products. By retaining the printed product parameters in the border feature, only the border with cutting errors is measured, and at the same time, the fixed-point features on the printed product located in the border, such as the gravure feature information and the boundary information, are used as the same reference information, which can further reduce the measurement error between the printed products and solve the problem of poor measurement accuracy in current measurement methods.

[0029] Embodiment 2 See also Figure 2 , shown is a method for measuring the size of printed matter in a second embodiment of the present invention, and the method shown specifically includes steps S11 to S12.

[0030] Step S11, obtaining printed image information and constructing a measurement model, determining a reference point in the measurement model, determining at least one edge point in the image information, and inserting the image information into the measurement model in a manner that the edge point coincides with the reference point.

[0031] In a specific implementation, image information of a printed product is obtained, wherein the image information includes at least edge information, and after a measurement model is constructed, a reference point is arbitrarily determined in the measurement model, and then the image information is imported into the measurement model. During the process, an edge point needs to be arbitrarily determined on the edge information first, and the position of the image information in the measurement model is corrected in such a way that the edge point coincides with the reference point, or the image information is imported into the measurement model in such a way that the reference point coincides with the edge point.

[0032] Step S12, establish coordinates using the reference point as the origin, obtain the pixel coverage of the image information in the coordinates along the X-axis and Y-axis directions respectively, and determine the size information of the image information on the X-axis and Y-axis respectively according to the formula: Q*C, where Q is the pixel coverage and C is the length conversion value corresponding to each pixel.

[0033] In the specific implementation, the reference point is used as the origin to establish the coordinates, and the image information is obtained in the coordinates as the pixel coverage along the X-axis and Y-axis directions, according to the formula: Q*C, where Q is the pixel coverage, which can be specifically Q X and Q Y, C is the length conversion value corresponding to each pixel point. It should be noted that the corresponding pixel point parameters are different due to different display accuracy on the computer. Therefore, in order to ensure the accuracy of subsequent measurement data, the length conversion values ​​corresponding to different pixel point parameters are also different, so that the C value taken also has certain differences. This is a technical means that can be understood by those skilled in the art. The operator can select the corresponding C value and Q value according to the current pixel point parameters for calculation, and finally derive the X-axis size and Y-axis size in the printed image information.

[0034] In summary, the difference between this embodiment and the first embodiment is that, for the measurement of printed products, a reference point is determined in the constructed measurement model, and an edge point is randomly determined on the image information of the printed product, and then the edge point is introduced into the measurement system in a manner of coinciding with the reference point, and a rectangular coordinate system is established with the reference point as the origin, and then the pixel coverage range of the image information along the X-axis and Y-axis in the rectangular coordinate system is obtained, and the size of the corresponding printed product on the X-axis and the size on the Y-axis are calculated by a formula, thereby simplifying the measurement process and improving the efficiency of outputting the measurement results.

[0035] Embodiment 3 Another aspect of the present invention provides a printed matter size measurement system. Figure 3 , which is a printed matter size measuring system in a third embodiment of the present invention, the system comprises: The acquisition module 11 is used to acquire the image information of the printed product, and insert the image information after constructing the measurement model to determine the basic feature information of the printed product, where the basic feature information at least includes the boundary information of the printed product and a plurality of gravure feature information; A coordinate measurement module 12 is used to obtain the gravure coordinates of multiple gravure feature information on the printed product and the boundary coordinates in each boundary information of the printed product, and determine the spacing information from the gravure coordinates to at least two boundary coordinates on the same side; The size calculation module 13 is used to obtain the size information of the printing mold, expand the size boundary of the printing mold according to the spacing information, and determine the expanded size as the overall size of the printed product.

[0036] Furthermore, in some optional embodiments of the present invention, the present invention further includes: The second acquisition module is used to acquire printed image information and construct a measurement model, determine a reference point in the measurement model, determine at least one edge point in the image information, and insert the image information into the measurement model according to the overlap of the edge point and the reference point.

[0037] Furthermore, in some optional embodiments of the present invention, the present invention further includes: The second size calculation module is used to establish coordinates using the reference point as the origin, obtain the pixel coverage of the image information in the coordinates along the X-axis and Y-axis directions respectively, and determine the size information of the image information on the X-axis and Y-axis respectively according to the formula: Q*C, where Q is the pixel coverage and C is the length conversion value corresponding to each pixel.

[0038] Embodiment 4 See also Figures 4 to 7 As shown, a printed matter size measuring device in a fourth embodiment of the present invention comprises a computer device 1 and a scanning device 2 electrically connected to the computer device 1, the computer device 1 comprises a memory 20, a processor 10 and a computer program 30 stored in the memory 10 and executable on the processor 10, the processor 10 executes the computer program, the scanning device 2 comprises a connecting platform 21 electrically connected to the computer device 1, a scanning platform 22 disposed on the connecting platform 21, and a flattening top cover 24 flipped over and disposed on the scanning platform 22, a plurality of auxiliary lines are disposed on a side of the scanning platform 22 facing the flattening top cover 24, the flattening top cover 24 comprises a movable shaft 241 movably connected to the scanning platform 22, a fixed plate 242 disposed on a side of the movable shaft 241 away from the scanning platform 22, a spring 243 embedded on the fixed plate 242, a flattening plate 244 disposed on a side of the spring 243 away from the fixed plate 242, and an adjusting bolt 245 penetrating through both sides of the fixed plate 242 to the flattening plate 244.

[0039] In the specific implementation, in order to ensure that the surface of the printed matter is flat and the position on the scanning device 2 is corrected when the scanning device 2 collects the image information of the printed matter, the operator can first place the printed matter directly on the surface of the scanning platform 22, and adjust the position of the printed matter with reference to the auxiliary line 23, so as to preliminarily ensure that the position of the printed matter itself is flat and ensure the correction of the image when the printed matter is subsequently scanned and sampled. After that, the operator can flip the flattening top cover 24 so that it is flipped along the movable axis 241 toward the top surface of the scanning platform 22 to achieve the pressing of the printed matter on the surface of the scanning platform 22. Specifically, the adjusting bolt 245 close to the side of the movable axis 241 can be first rotated clockwise to drive the pressing plate 244 to tilt toward the side close to the movable axis 241. The purpose is to avoid that when the flattening top cover 24 is flipped toward the surface of the scanning platform 22, the pressing plate 244 protrudes from the fixed plate 242, causing the pressing plate 2 The upper part of the structure 44 will first contact the printed matter, and when the flattening top cover 24 continues to flip toward the side of the scanning table 22, the flattening plate 244 will drive the printed matter to slide relatively on the surface of the scanning table 22, causing the printed matter to shift, thereby affecting the accuracy of subsequent measurement data. Then, the operator can counterclockwise rotate the adjusting bolt 245 close to the side of the movable shaft 241 to restore the flattening plate 244 to a parallel state with the printed matter and press the printed matter on the scanning table 22. In some optional embodiments, the operator can also simultaneously adjust the two adjusting bolts 245 to drive the flattening plate 244 to embed into the fixed plate 242, and after the flattening top cover 24 and the scanning table 22 are closed, the two adjusting bolts 245 are used to drive the flattening plate 244 to press down vertically toward the printed matter, so as to flatten the surface of the printed matter to avoid wrinkles on the surface of the printed matter, thereby affecting the accuracy of subsequent printed matter size measurement.

[0040] Based on computer equipment 1 Figure 5 As shown, it includes a memory 20, a processor 10, and a computer program 30 stored in the memory and executable on the processor. When the processor 10 executes the computer program 30, the printed product size measurement method as described above is implemented to complete the measurement of the printed product size.

[0041] The printed product size measuring device may specifically be a processor 10, which in some embodiments may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor or other data processing chip, for running program codes or processing data stored in the memory 20, such as executing access restriction programs.

[0042] The memory 20 includes at least one type of readable storage medium, and the readable storage medium includes a flash memory, a hard disk, a multimedia card, a card-type memory (for example, an SD or DX memory, etc.), a magnetic memory, a disk, an optical disk, etc. In some embodiments, the memory 20 may be an internal storage unit of the planar design drawing review system, such as a hard disk of the printed product size measurement system. In other embodiments, the memory 20 may also be an external storage system of the printed product size measurement system, such as a plug-in hard disk equipped on the printed product size measurement system, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card, etc. Further, the memory 20 may also include both an internal storage unit and an external storage system of the printed product size measurement system. The memory 20 may be used not only to store application software and various types of data installed in the printed product size measurement system, but also to temporarily store data that has been output or is to be output.

[0043] It should be pointed out that Figure 5 The structure shown does not constitute a limitation on the printed matter dimension measuring system. In other embodiments, the printed matter dimension measuring system may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0044] Embodiment 5 The embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the printed product size measurement method as described above is implemented.

[0045] Those skilled in the art will appreciate that the logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by an instruction execution system, system or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, system or device and execute instructions), or in conjunction with such instruction execution systems, systems or devices. For purposes of this specification, a "computer-readable medium" may be any system that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, system or device, or in conjunction with such instruction execution systems, systems or devices.

[0046] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic systems), a portable computer disk cartridge (magnetic systems), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber system, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0047] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0049] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for measuring the size of a printed matter, characterized in that: The method comprises: Acquire image information of a printed product, and insert the image information after constructing a measurement model to determine basic feature information of the printed product, wherein the basic feature information at least includes boundary information of the printed product and a plurality of gravure feature information; Acquire the gravure coordinates of the plurality of gravure feature information on the printed matter, and the boundary coordinates in each boundary information of the printed matter, and determine the spacing information from the gravure coordinates to at least two boundary coordinates on the same side; The printing mold size information is obtained, the size boundary of the printing mold is expanded outward according to the spacing information, and the size of the expanded printing mold is determined as the overall size of the printed product.

2. A printed matter size measurement method according to claim 1, characterized in that: The step of obtaining the gravure coordinates of the plurality of gravure feature information on the printed product and the boundary coordinates of each boundary of the printed product comprises: The gravure coordinates of the four gravure feature information located around the printed product are obtained, and the boundary coordinates in the boundary information of at least four sides of the printed product are obtained, and according to the gravure coordinates, the shortest two adjacent boundaries along the X-axis and the Y-axis to the boundary coordinates are determined as the two boundaries on the same side of the gravure coordinates.

3. A printed matter size measurement method according to claim 2, characterized in that: The step of determining the distance information between the gravure coordinates and at least two boundary coordinate information on the same side comprises: The coordinate distances from the gravure coordinates to the two boundary coordinates on the same side are respectively obtained, and a frame feature based on the gravure feature information is constructed according to the coordinate distances, and the frame feature is used as the distance information, and the frame feature at least includes the frame size.

4. A printed matter size measurement method according to claim 1, characterized in that: The steps of acquiring image information of a printed product, inserting the image information after constructing a measurement model, and determining basic feature information of the printed product include: The printed product image information is acquired and a measurement model is constructed, a reference point is determined in the measurement model, and the image information is inserted into the measurement model by determining at least one edge point in the image information and according to the coincidence of the edge point with the reference point.

5. A printed matter size measurement method according to claim 4, characterized in that: The steps of acquiring the printed product image information and constructing a measurement model, determining reference points in the measurement model, acquiring edge points in the image information, and inserting the image information into the measurement model in a manner in which the edge points coincide with the reference points include: The reference point is used as the origin to establish coordinates, and the pixel coverage of the image information along the X-axis and Y-axis directions in the coordinates is obtained. According to the formula: Q*C, where Q is the pixel coverage range and C is the length conversion value corresponding to each pixel, the size information of the image information on the X-axis and Y-axis is determined respectively.

6. A printed matter size measuring system, used to implement the printed matter size measuring method according to any one of claims 1 to 5, characterized in that: The system comprises: An acquisition module, used for acquiring image information of a printed product, and inserting the image information into a measurement model to determine basic feature information of the printed product, wherein the basic feature information at least includes boundary information of the printed product and a plurality of gravure feature information; A coordinate measurement module, used for obtaining the gravure coordinates of the plurality of gravure feature information on the printed product and the boundary coordinates in each boundary information of the printed product, and determining the spacing information from the gravure coordinates to at least two boundary coordinates on the same side; The size calculation module is used to obtain the size information of the printing mold, expand the size boundary of the printing mold according to the spacing information, and determine the expanded size as the overall size of the printed product.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the printed matter size measuring method as claimed in any one of claims 1 to 5 is implemented.

8. A printed matter size measuring device, characterized in that: Used to implement the printed matter size measurement method described in any one of claims 1 to 5, the printed matter size measurement device comprises a computer device and a scanning device electrically connected to the computer device; The computer device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program; The scanning device comprises a connection platform electrically connected to the computer device, a scanning platform arranged on the connection platform, and a flattened top cover which is turned over and arranged on the scanning platform.

9. The printed matter size measuring device according to claim 8, characterized in that: The flattening top cover includes a movable shaft movably connected to the scanning platform, a fixed plate arranged on the side of the movable shaft away from the scanning platform, a spring embedded in the fixed plate, a flat plate arranged on the side of the spring away from the fixed plate, and an adjusting bolt that passes through both sides of the fixed plate to the flat plate.

Images