CN114274657B - Laser direct plate-making control method, system and related equipment - Google Patents

Laser direct plate-making control method, system and related equipment Download PDF

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CN114274657B
CN114274657B CN202111577173.6A CN202111577173A CN114274657B CN 114274657 B CN114274657 B CN 114274657B CN 202111577173 A CN202111577173 A CN 202111577173A CN 114274657 B CN114274657 B CN 114274657B
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intermediate data
matched
laser
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CN114274657A (en
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陈乃奇
高飞
刘光耀
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Shenzhen Anteland Technology Co Ltd
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Abstract

The embodiment of the invention provides a laser direct plate-making control method, a laser direct plate-making control system and related equipment, which are used for improving the quality and efficiency of printing production. The method comprises the following steps: scanning a plurality of printing surfaces printed according to the original image respectively to obtain a plurality of scanning images; extracting image features of images in preset image layers in the original image, and respectively matching and identifying matched images in the plurality of scanned images according to the image features; acquiring image characteristics of the multiple matched images, and calculating intermediate data of the image characteristics of the multiple matched images; deforming the image in the preset image layer according to the intermediate data so that the image characteristics of the corrected image generated after deformation are consistent with the intermediate data; and controlling a laser to perform laser direct plate making according to the corrected image.

Description

Laser direct plate-making control method, system and related equipment
Technical Field
The invention relates to the technical field of laser imaging, in particular to a method and a system for controlling direct plate making of laser and related equipment.
Background
UV (ultra violet) glue, also known as UV glazing, is the term of the printing industry and is a post-treatment process of printed matter. The method is characterized in that special photosensitive resist is precisely and uniformly coated on the surface or local area of a printed matter, and after ultraviolet irradiation, the surface of the printed matter is rapidly dried and hardened, so that the coated area of the printed matter obtains a bright film layer, and the effects of protecting prints, beautifying products and replacing a coating film are achieved.
Before the surface of the printed matter is coated with the photosensitive resist, a screen printing plate needs to be manufactured according to the shape of a pattern area needing to be coated with the photosensitive resist. In the prior art, in the process of manufacturing the screen printing plate, a film needs to be manufactured based on an original image, and then the film is placed at a proper position of a screen frame in a manual alignment mode to manufacture the screen printing plate, so that the controllability of manual operation is poor, and the quality and efficiency of printing production are often influenced. Moreover, after a printed product is made according to the original image, due to printing errors or paper deformation (such as deformation caused by thermal expansion and contraction of paper after offset printing), image deformation (such as pattern shift or expansion and contraction) occurs on the local image on the printed product relative to the corresponding local image in the original image, so that the film of the local image made based on the original image cannot be completely matched with the local image on the printed product, and the quality of printing production is affected.
Disclosure of Invention
The embodiment of the invention provides a laser direct plate-making control method, a laser direct plate-making control system and related equipment, which are used for improving the quality and efficiency of printing production.
The first aspect of the embodiments of the present invention provides a laser direct plate making control method, which may include:
scanning a plurality of printing surfaces printed according to the original image respectively to obtain a plurality of scanning images;
extracting image features of images in preset image layers in the original image, and respectively matching and identifying matched images in the plurality of scanned images according to the image features;
acquiring image features of the multiple matched images, and calculating intermediate data of the image features of the multiple matched images;
deforming the image in the preset image layer according to the intermediate data so that the image characteristics of the corrected image generated after deformation are consistent with the intermediate data;
and controlling a laser to perform laser direct plate making according to the corrected image.
Optionally, as a possible implementation manner, the laser direct plate making control method in the embodiment of the present invention may further include:
and removing the images which are not successfully matched from the plurality of scanned images before acquiring the image characteristics of the plurality of matched images.
Optionally, as a possible implementation manner, in an embodiment of the present invention, the intermediate data is an average value of image features of the multiple matching images, or an image feature of the multiple matching images with a central ranking of the image features.
A second aspect of an embodiment of the present invention provides a laser direct plate-making control system, which may include:
the scanning module is used for respectively scanning a plurality of printing surfaces printed according to the original image to obtain a plurality of scanning images;
the first processing module is used for extracting image features of images in preset image layers in the original image and respectively matching and identifying matched images in the plurality of scanned images according to the image features;
the second processing module is used for acquiring the image characteristics of the plurality of matched images and calculating intermediate data of the image characteristics of the plurality of matched images;
a third processing module, configured to deform the image in the preset layer according to the intermediate data, so that an image feature of a corrected image generated after deformation is consistent with the intermediate data;
and the plate making control module is used for controlling the laser to carry out laser direct plate making according to the corrected image.
Optionally, as a possible implementation manner, the laser direct plate-making control system in the embodiment of the present invention may further include:
and the fourth processing module is used for removing the images which are not successfully matched from the plurality of scanning images before the image characteristics of the plurality of matched images are acquired.
Optionally, as a possible implementation manner, in an embodiment of the present invention, the intermediate data is an average value of image features of the multiple matching images, or an image feature of the multiple matching images with a central ranking of the image features.
A third aspect of embodiments of the present invention provides a computer apparatus, which includes a processor, and the processor is configured to implement the steps in any one of the possible implementation manners of the first aspect and the first aspect when executing a computer program stored in a memory.
A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in any one of the possible implementations of the first aspect and the first aspect.
According to the technical scheme, the embodiment of the invention has the following advantages:
in the embodiment of the invention, the image characteristics of the image in the preset layer in the original image are extracted, the image characteristics of the matched image which is successfully matched are obtained by respectively matching in a plurality of scanned images of the image printed according to the original image according to the image characteristics, the intermediate data of the image characteristics of the plurality of matched images are calculated, the image in the preset layer in the original image is deformed according to the intermediate data, so that the image characteristics of the corrected image generated after deformation are consistent with the intermediate data, and finally, a laser is controlled to expose the mapping position of the laser exposure point in the corrected image on the screen frame. Because the image characteristics in the corrected image tend to be consistent with the image characteristics of the image after printing deformation, the image deformation of the image on the screen frame after laser exposure tends to be consistent with the image deformation of the image after printing deformation, the matching degree of the local image on the printing surface and the mesh image of the screen frame is improved in the later printing process, and the production quality of the later printing process is improved. Meanwhile, manual operation in the film process is avoided, and the production efficiency is improved.
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FIG. 1 is a schematic diagram of an embodiment of a laser direct plate making control method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an embodiment of a computer device according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be implemented in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For ease of understanding, the following describes a specific process in an embodiment of the present invention, and with reference to fig. 1, an embodiment of a method for controlling a laser direct plate making according to an embodiment of the present invention may include:
and S101, scanning a plurality of printing surfaces printed according to the original images to obtain a plurality of scanning images.
Due to printing errors or paper deformation (such as deformation caused by thermal expansion and contraction of paper after offset printing), local images on the printed matter are subjected to image deformation (such as pattern shift or expansion and contraction) relative to local images in the original images, and the degree of image deformation needs to be identified before image correction is performed.
For this reason, before performing a post-printing process (e.g., a UV glue process or a color process), after performing preliminary printing on the plurality of printing surfaces respectively according to the original image, the plurality of printing surfaces after completing the preliminary printing may be scanned respectively to obtain a plurality of scanned images.
Considering that the deformation amount between the plurality of printing surfaces is less abrupt and is often distributed in a linear continuity manner, it is preferable that an appropriate amount of printing surfaces are selected from the plurality of printing surfaces in a dispersed manner and are scanned to obtain a plurality of scanned images. For example, in 1000 sheets of printing paper, 15 sheets of printing paper, i.e., the top 5 sheets, the middle 5 sheets, and the bottom 5 sheets, may be selected and scanned to obtain corresponding scanned images.
Optionally, for convenience and accuracy of feature recognition of the subsequent image, the scanned image may be configured as a binary image, that is, each pixel in the image has only two possible values, corresponding to the laser-exposed pixel and the non-laser-exposed pixel, respectively.
S102, extracting image characteristics of images in a preset layer in an original image, and respectively matching and identifying matched images matched with the images in the preset layer in a plurality of scanned images according to the image characteristics.
In practical application, the original image may include a plurality of layers, an image in a preset layer may be selected from the original image according to design requirements to perform a post-printing process, the selected layer is the preset layer, or the image processed by the post-printing process may be used alone as the preset layer, so as to extract image features of the image in the preset layer, and match and identify matching images matched with the image in the preset layer in the plurality of scanned images according to the image features.
The specific image features may include shape features and/or spatial relationship features, and the types of the specific image features may be reasonably configured according to requirements, which is not limited herein. For a specific image feature extraction algorithm, reference may be made to the prior art, for example, an SIFT feature extraction algorithm may be adopted, which is not described herein.
After the image features of the images in the preset image layer are extracted, the scanned images are obtained based on the original image printing and necessarily contain the images in the preset image layer, the images can be matched in the multiple scanned images according to the image features, and the images which are successfully matched are the matched images.
S103, acquiring the image characteristics of the multiple matched images, and calculating the intermediate data of the image characteristics of the multiple matched images.
After the matching image is obtained, the image feature extraction algorithm which is the same as that used for processing the image in the preset image layer is adopted to extract the image feature corresponding to the matching image, and then the intermediate data of the image features of the multiple matching images are calculated. The specific intermediate data may be an average value of all image features, or may be an image feature that is ranked in the middle, and is not limited here. For example, if each image feature includes location data of several feature points, the location data of the same feature point in the multiple image features may be averaged or sorted to perform a median processing.
Optionally, as a possible implementation manner, in order to reduce interference of obtaining image features and improve data extraction efficiency, before obtaining image features of multiple matched images, images that are not successfully matched may be removed from all scanned images, and only images that are successfully matched are retained.
And S104, deforming the image in the preset layer according to the intermediate data so as to enable the image characteristics of the corrected image generated after deformation to be consistent with the intermediate data.
After the intermediate data of the image features of the multiple matched images are acquired, the image in the preset image layer in the original image can be deformed according to the intermediate data, so that the image features of the corrected image generated after deformation are consistent with the intermediate data. The specific image deformation algorithm can refer to the related technologies, such as a multi-line segment constraint deformation algorithm, a Morphing algorithm (divided into four types: a grid Morphing algorithm, a domain Morphing algorithm, a point Morphing algorithm and a complex feature Morphing algorithm), and the like.
And S105, controlling a laser to perform laser direct plate making according to the corrected image.
And after obtaining the corrected image, controlling a laser to perform laser direct plate making according to the corrected image. Specifically, the corrected image may be rasterized, pixels in the corrected image are mapped onto the exposure surface of the screen frame, the positions of the laser exposure points on the exposure surface are determined according to the mapping relationship, and finally, the laser (the laser direct plate-making device) is controlled to directly expose the laser exposure points on the exposure surface and develop the exposed exposure surface to form a pattern meeting the requirements on the screen frame.
As can be seen from the above disclosure, in the embodiment of the present application, image features of an image in a preset layer in an original image are extracted, and are respectively matched in a plurality of scanned images of an image printed according to the original image according to the image features, image features of a successfully matched image are obtained, intermediate data of the image features of the plurality of matched images are calculated, the image in the preset layer in the original image is deformed according to the intermediate data, so that the image features of a corrected image generated after deformation are consistent with the intermediate data, and finally, a laser is controlled to expose a mapping position of a laser exposure point in the corrected image on a screen frame. Because the image characteristics in the corrected image tend to be consistent with the image characteristics of the image after printing deformation, the image deformation of the image on the screen frame after laser exposure and the image deformation of the image after printing deformation tend to be consistent, the matching degree of the local image on the printing surface and the mesh image of the screen frame is improved in the process of the later printing process, and the production quality of the later printing process is improved. Meanwhile, manual operation in the film process is avoided, and the production efficiency is improved.
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above steps do not mean the execution sequence, and the execution sequence of the steps should be determined by their functions and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
The embodiment of the invention also provides a laser direct plate-making control system, which can comprise:
the scanning module is used for scanning a plurality of printing surfaces printed according to the original image to obtain a plurality of scanning images;
the first processing module is used for extracting image features of images in preset image layers in the original image and respectively matching and identifying matched images in the plurality of scanned images according to the image features;
the second processing module is used for acquiring the image characteristics of the plurality of matched images and calculating the intermediate data of the image characteristics of the plurality of matched images;
the third processing module is used for deforming the image in the preset image layer according to the intermediate data so that the image characteristics of the corrected image generated after deformation are consistent with the intermediate data;
and the plate making control module is used for controlling the laser to carry out laser direct plate making according to the corrected image.
Optionally, as a possible implementation, the laser direct plate-making control system may further include:
and the fourth processing module is used for removing the images which are not successfully matched from the plurality of scanned images before acquiring the image characteristics of the plurality of matched images.
Optionally, as a possible implementation manner, in the laser direct plate-making control system, all the images in the plurality of scanned images are binary images.
Optionally, as a possible implementation, the laser direct plate making control system may be configured to determine the intermediate data as an average value of image features of the plurality of matching images, or as an image feature of the plurality of matching images with a centered sequence of image features.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The laser direct plate making control system in the embodiment of the present invention is described above from the perspective of the modular functional entity, please refer to fig. 2, and the computer device in the embodiment of the present invention is described below from the perspective of hardware processing:
the computer device 1 may include a memory 11, a processor 12 and an input output bus 13. The processor 12 implements the above-described laser direct plate-making control method shown in fig. 1, for example, steps 101 to 105 shown in fig. 1, when executing the computer program. Alternatively, the processor, when executing the computer program, implements the functions of each module or unit in the above-described apparatus embodiments.
In some embodiments of the present invention, the processor is specifically configured to implement the following steps:
scanning a plurality of printing surfaces printed according to the original image respectively to obtain a plurality of scanning images;
extracting image features of images in preset image layers in an original image, and respectively matching and identifying matched images in a plurality of scanned images according to the image features;
acquiring image characteristics of a plurality of matching images, and calculating intermediate data of the image characteristics of the plurality of matching images;
deforming the image in the preset image layer according to the intermediate data so that the image characteristics of the corrected image generated after deformation are consistent with the intermediate data;
and controlling a laser to perform laser direct plate making according to the corrected image.
Optionally, as a possible implementation manner, the processor may be further configured to implement the following steps:
and removing the images which are not matched successfully from the plurality of scanned images.
The memory 11 includes at least one type of readable storage medium, which includes flash memory, a hard disk, a multimedia card, a card type memory (e.g., SD or DX memory, etc.), a magnetic memory, a magnetic disk, an optical disk, and the like. The memory 11 may in some embodiments be an internal storage unit of the computer apparatus 1, for example a hard disk of the computer apparatus 1. The memory 11 may also be an external storage device of the computer apparatus 1 in other embodiments, such as a plug-in hard disk provided on the computer apparatus 1, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 11 may also include both an internal storage unit and an external storage device of the computer apparatus 1. The memory 11 may be used not only to store application software installed in the computer apparatus 1 and various types of data such as codes of computer programs, etc., but also to temporarily store data that has been output or is to be output.
The processor 12 may be a Central Processing Unit (CPU), controller, microcontroller, microprocessor or other data Processing chip in some embodiments, and is used for executing program codes stored in the memory 11 or Processing data, such as executing computer programs.
The input/output bus 13 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc.
Further, the computer apparatus may further include a wired or wireless network interface 14, and the network interface 14 may optionally include a wired interface and/or a wireless interface (such as a WI-FI interface, a bluetooth interface, etc.), which are generally used for establishing a communication connection between the computer apparatus 1 and other electronic devices.
Fig. 2 shows only the computer device 1 with components 11-14 and a computer program, it being understood by a person skilled in the art that the structure shown in fig. 2 does not constitute a limitation of the computer device 1, and may comprise fewer or more components than shown, or a combination of certain components, or a different arrangement of components.
The present invention also provides a computer-readable storage medium having a computer program stored thereon, which when executed by a processor, performs the steps of:
scanning a plurality of printing surfaces printed according to the original image respectively to obtain a plurality of scanning images;
extracting image features of images in a preset image layer in an original image, and respectively matching and identifying matched images in a plurality of scanned images according to the image features;
acquiring image characteristics of a plurality of matched images, and calculating intermediate data of the image characteristics of the plurality of matched images;
deforming the image in the preset image layer according to the intermediate data so that the image characteristics of the corrected image generated after deformation are consistent with the intermediate data;
and controlling a laser to perform laser direct plate making according to the corrected image.
Optionally, as a possible implementation manner, the processor may be further configured to implement the following steps:
and removing the images which are not matched successfully from the plurality of scanned images.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (6)

1. A laser direct plate making control method is characterized by comprising the following steps:
scanning a plurality of printing surfaces printed according to the original image respectively to obtain a plurality of scanning images;
extracting image features of images in a preset image layer in the original image, and respectively matching and identifying a plurality of matched images in the plurality of scanned images according to the image features;
acquiring image features of the multiple matched images, and calculating intermediate data of the image features of the multiple matched images, wherein the intermediate data is an average value of the image features of the multiple matched images or an image feature with a central image feature sequence of the multiple matched images;
deforming the image in the preset image layer according to the intermediate data so that the image characteristics of the corrected image generated after deformation are consistent with the intermediate data;
and controlling a laser to perform laser direct plate making according to the corrected image.
2. The method of claim 1, wherein prior to obtaining image features of the plurality of matching images, the method comprises:
and removing the images which are not matched successfully from the plurality of scanned images.
3. A laser-to-plate control system, comprising:
the scanning module is used for scanning a plurality of printing surfaces printed according to the original image to obtain a plurality of scanning images;
the first processing module is used for extracting image features of images in preset image layers in the original image and respectively matching and identifying a plurality of matched images in the plurality of scanned images according to the image features;
the second processing module is used for acquiring the image features of the multiple matched images and calculating intermediate data of the image features of the multiple matched images, wherein the intermediate data is an average value of the image features of the multiple matched images or image features of the multiple matched images with central image feature sequencing;
the third processing module is used for deforming the image in the preset image layer according to the intermediate data so as to enable the image characteristics of the corrected image generated after deformation to be consistent with the intermediate data;
and the plate making control module is used for controlling the laser to carry out direct laser plate making according to the corrected image.
4. The system of claim 3, further comprising:
and the fourth processing module is used for removing the images which are not successfully matched from the plurality of scanning images before acquiring the image characteristics of the plurality of matched images.
5. A computer arrangement, characterized in that the computer arrangement comprises a processor for implementing the method according to any one of claims 1-2 when executing a computer program stored in a memory.
6. A computer-readable storage medium having stored thereon a computer program, characterized in that: the computer program, when executed by a processor, implements the method of any one of claims 1 to 2.
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