A laser direct imaging control method, system and related device
By identifying and matching connected components and feature points of printed images, adjusting image positions, and controlling laser plate making, the problems of complex screen printing plate making and poor controllability of manual alignment in existing technologies are solved, thereby improving the quality and efficiency of printing production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENZHEN ANTELAND TECH CO LTD
- Filing Date
- 2022-03-18
- Publication Date
- 2026-05-29
AI Technical Summary
Existing technologies involve complex, time-consuming, and labor-intensive processes in the production of screen printing stencils. The manual alignment operation has poor controllability, which affects the quality and efficiency of printing production.
By acquiring scanned images after printing, identifying connected components and feature points, matching and adjusting image positions, and controlling the laser to perform laser plate making, manual operation is avoided.
It improves the quality and efficiency of printing production, ensures the matching degree between the local image on the printing surface and the mesh image of the frame, and reduces the steps of film production and manual alignment.
Smart Images
Figure CN116794933B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of laser imaging technology, and in particular to a laser direct plate making control method, system and related equipment. Background Technology
[0002] UV (ultraviolet) coating, also known as UV varnishing, is a term in the printing industry referring to a post-printing process. It involves precisely and evenly applying a special photosensitive adhesive to the surface or specific areas of a printed product after initial printing. After being exposed to ultraviolet light, the adhesive quickly dries and hardens on the surface, creating a glossy film that protects the print, enhances the product's appearance, and serves as an alternative to lamination.
[0003] Before coating the surface of printed materials with photosensitive emulsion, a screen printing stencil needs to be created according to the shape of the graphic area to be coated. Current technology requires creating a film based on the original image, then cutting multiple images from the complete film, and finally manually aligning the cut film to the appropriate position on the screen frame to create the screen printing stencil. Therefore, the existing method of film creation and cutting is complex, time-consuming, and labor-intensive. Furthermore, the lack of control over manual alignment often affects the quality and efficiency of printing production. Summary of the Invention
[0004] This invention provides a laser direct plate making control method, system, and related equipment to improve the quality and efficiency of printing production.
[0005] The first aspect of this invention provides a laser direct plate making control method, which may include:
[0006] Obtain a scanned image of the printed surface after printing based on the original image;
[0007] The original image is traversed to identify connected components in the image, and feature points of each connected region are identified.
[0008] Based on the position of each connected region in the original image, sub-image regions corresponding to each connected region are extracted from the scanned image, and feature points of each sub-image region are identified.
[0009] The feature points of each connected region are matched with the feature points of their respective sub-image regions, and the position data of the successfully matched feature points in the scanned image are obtained.
[0010] The positions of each connected region in the original image are adjusted to generate a corrected image, such that the positions of the feature points of each connected region in the corrected image are consistent with the positions of the successfully matched feature points in the scanned image.
[0011] The laser is controlled to perform laser plate making based on the corrected image.
[0012] Optionally, as a possible implementation, the laser direct plate making control method in this embodiment of the invention may further include:
[0013] Before identifying the feature points of each connected region, a merging operation is performed on each identified connected region. The merging operation includes: determining whether the sum of the areas of adjacent connected regions is greater than a preset threshold; if it is not greater, then the adjacent connected regions are merged; if it is greater, then the adjacent connected regions are not merged.
[0014] Optionally, as a possible implementation, the laser direct plate making control method in this embodiment of the invention may further include:
[0015] Before identifying the feature points of each connected region, a merging operation is performed on the identified connected regions. The merging operation includes: determining whether the distance between the nearest points of adjacent connected regions is greater than a preset threshold; if it is not greater, the adjacent connected regions are merged; if it is greater, the adjacent connected regions are not merged.
[0016] Optionally, as a possible implementation, in this embodiment of the invention, the step of matching the feature points of each connected region with the feature points of their respective corresponding sub-image regions and obtaining the position data of the successfully matched feature points in the scanned image includes:
[0017] The image feature points of each connected region are matched in the corresponding sub-image regions of multiple scanned images to obtain the position data of the feature points of a single connected region in multiple scanned images.
[0018] Calculate intermediate data of the position data of feature points of a single connected region in multiple scanned images, and use the intermediate data as the position data of the corresponding connected region in the scanned images.
[0019] Optionally, as a possible implementation, in this embodiment of the invention, the intermediate data is the average value of the position data of a single connected region in multiple scanned images, or the position data of a single connected region in multiple scanned images with the position data sorted in the middle.
[0020] Optionally, as a possible implementation, in this embodiment of the invention, adjusting the positions of the connected regions in the original image to generate the corrected image may include:
[0021] The images of each connected region in the original image are transferred to a blank template to generate a corrected image, so that the positions of the feature points of each connected region in the corrected image are consistent with the positions of the successfully matched feature points in the scanned image.
[0022] A second aspect of this invention provides a laser direct plate making control method system, which may include:
[0023] The acquisition module is used to acquire a scanned image of the printed surface after printing based on the original image;
[0024] The first recognition module is used to traverse the original image to identify connected components in the image and identify feature points of each connected component.
[0025] The second recognition module is used to extract sub-image regions corresponding to each connected region in the scanned image based on the position of each recognized connected region in the original image, and to identify feature points of each sub-image region.
[0026] The matching module is used to match the feature points of each connected region with the feature points of their respective sub-image regions, and to obtain the position data of the successfully matched feature points in the scanned image.
[0027] The image processing module is used to adjust the positions of each connected region in the original image to generate a corrected image, so that the positions of the feature points of each connected region in the corrected image are consistent with the positions of the successfully matched feature points in the scanned image.
[0028] The control module controls the laser to perform laser plate making based on the corrected image.
[0029] Optionally, as a possible implementation, the laser direct plate making control method system in this embodiment of the invention may further include:
[0030] The merging module is used to perform a merging operation on the identified connected components. The merging operation includes: determining whether the sum of the areas of adjacent connected components is greater than a preset threshold; if it is not greater, then the adjacent connected components are merged; if it is greater, then the adjacent connected components are not merged.
[0031] Optionally, as a possible implementation, in this embodiment of the invention, the matching module may include:
[0032] The matching unit performs feature point matching on the image feature points of each connected region in the corresponding sub-image regions of multiple scanned images, thereby obtaining the position data of the feature points of a single connected region in multiple scanned images;
[0033] The calculation unit is used to calculate intermediate data of the position data of feature points of a single connected region in multiple scanned images, and to use the intermediate data as the position data of the corresponding connected region in the scanned images.
[0034] Optionally, as a possible implementation, in this embodiment of the invention, the intermediate data is the average value of the position data of a single connected region in multiple scanned images, or the position data of a single connected region in multiple scanned images with the position data sorted in the middle.
[0035] A third aspect of the present invention provides a laser direct plate making apparatus, the laser direct plate making apparatus including a processor, the processor being configured to execute a computer program stored in a memory to implement the steps as described in the first aspect and any possible implementation thereof.
[0036] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the first aspect and any possible implementation thereof.
[0037] As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:
[0038] In this embodiment of the invention, the original image is divided into multiple connected regions, and feature points of each connected region are identified. Feature points of the corresponding sub-images within the error region of each connected region are extracted from the scanned image. Then, the feature points of each connected region are matched with the feature points of their respective sub-image regions, and the position data of the successfully matched feature points in the scanned image is obtained. The positions of each connected region in the original image are adjusted to generate a corrected image, ensuring that the positions of the feature points in each connected region of the corrected image are consistent with the positions of the successfully matched feature points in the scanned image. Finally, the laser is controlled to expose the laser exposure points in the corrected image to the mapped positions on the screen frame. Because the feature points in the corrected image are nearly identical to the feature points in the image after printing offset, the offset of the image on the screen frame after laser exposure is nearly identical to the offset of the image after printing offset. This improves the matching degree between the local image on the printing surface and the mesh image of the screen frame during the later stages of printing, thus improving the production quality of the later stages of printing. Simultaneously, it avoids manual operation in the film process, improving production efficiency. Attached Figure Description
[0039] Figure 1 This is a schematic diagram of one embodiment of the laser direct plate making control method in this invention;
[0040] Figure 2 A schematic diagram of a possible embodiment for partitioning connected components in the original image;
[0041] Figure 3 This is a schematic diagram of one embodiment of the laser direct plate making equipment in this invention. Detailed Implementation
[0042] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.
[0043] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0044] It should be noted that any embodiment described as "exemplary" or "for example" in this application should not be construed as having an advantage over other embodiments. Rather, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.
[0045] For ease of understanding, the specific processes in the embodiments of the present invention are described below. Please refer to [link / reference]. Figure 1 One embodiment of a laser direct plate making control method according to the present invention may include:
[0046] S101: Obtain a scanned image of the printed surface after printing based on the original image.
[0047] Due to printing errors or paper deformation (such as thermal expansion and contraction), local images on the printed material may shift relative to local images in the original image. If computer-to-plate (CTP) is used and the plate-making process is based on the positional relationships in the original image, misalignment of the UV adhesive coating on the printed material and the image position will inevitably occur, resulting in misalignment of the UV adhesive and affecting product quality.
[0048] To improve product quality, in this embodiment of the application, before performing post-printing processes (such as UV coating or color matching), one or more printed surfaces after printing based on the original image can be scanned to obtain a corresponding number of scanned images.
[0049] Taking scanning multiple printed surfaces as an example, considering that the deformation between multiple printed surfaces rarely changes abruptly and is often linearly continuous, it is preferable to select an appropriate number of printed surfaces at intervals to scan them separately to obtain multiple scanned images. For example, out of 1000 sheets of printed paper, the first 3 sheets, the middle 3 sheets, and the last 3 sheets, a total of 9 sheets, can be selected and scanned to obtain corresponding scanned images. Alternatively, the middle sheet can be selected directly to obtain a single scanned image.
[0050] S102: Traverse the original image to identify connected components in the image and identify feature points in each connected region.
[0051] An original image is often composed of multiple segmentable smaller images, which are distributed in various regions of the original image. This application can traverse the original image and identify the connected components of each smaller image by determining whether the pixels that make up the smaller images are connected or not, thereby identifying the connected components in the original image.
[0052] For example, such as Figure 2 As shown, the original image contains images corresponding to the numbers 1, 2, 3, 4, and 5, as well as an L-shaped image, which can be divided into 6 connected components.
[0053] After dividing the original image into connected components, existing image feature recognition algorithms, such as SIFT and SURF algorithms, can be used to identify feature points in each connected component for subsequent feature matching.
[0054] S103: Based on the position of each connected region in the original image, extract the sub-image region corresponding to each connected region in the scanned image, and identify the feature points of each sub-image region.
[0055] It is foreseeable that the deviation of the corresponding image after printing of each connected region in the original image is often small (less than 1 cm). Therefore, based on the position of each connected region in the original image, the area within the preset error range of the original position of each connected region is the sub-image region corresponding to the connected region in the printing surface, and the same image feature recognition algorithm is used to identify the feature points of each sub-image region.
[0056] S104: Match the feature points of each connected region with the feature points of their respective sub-image regions, and obtain the position data of the successfully matched feature points in the scanned image.
[0057] After obtaining the feature points of each connected region and the feature points of the sub-image region, the regions can be matched separately, and the position data of the successfully matched feature points in the scanned image can be obtained to determine the image offset of each connected region after printing.
[0058] It should be noted that for all feature points in a connected region to be successfully matched, only two or more feature points need to be successfully matched.
[0059] It should be noted that if only one scanned image is obtained, the location data of the successfully matched feature points in the scanned image can be directly determined. If multiple scanned images are obtained, feature points of each connected region can be matched in the corresponding sub-image regions of multiple scanned images to obtain the location data of the feature points of a single connected region in multiple scanned images; the intermediate data of the location data of a single connected region point in multiple scanned images can be calculated, and the intermediate data can be used as the location data of the corresponding connected region in the scanned image.
[0060] Specifically, the intermediate data for a single feature point in a connected region can be the average of the positions of all successfully matched feature points (feature points in the sub-image region), or it can be the position data of the feature point in the middle of the sorting; there is no limitation here. For example, if a single feature point in a connected region matches the position data of three feature points on three printed surfaces, the average of the position data of the three feature points can be calculated or the median can be taken from the sorting.
[0061] Optionally, as a possible implementation, in order to reduce interference in acquiring image features and improve data extraction efficiency, before acquiring the image features of multiple matching images, unmatched images can be removed from all scanned images, and only the successfully matched images can be retained.
[0062] S105: Adjust the positions of each connected region in the original image to generate a corrected image, so that the positions of the feature points of each connected region in the corrected image are consistent with the positions of the successfully matched feature points in the scanned image.
[0063] After obtaining the location data of the successfully matched feature points in the scanned image, the positions of each connected region in the original image can be adjusted to generate a corrected image, so that the positions of the feature points in each connected region in the corrected image are consistent with the positions of the successfully matched feature points in the scanned image.
[0064] For example, in this embodiment of the application, the images of each connected region in the original image can be transferred to a blank template to generate a corrected image, so that the positions of the feature points of each connected region in the corrected image are consistent with the positions of the successfully matched feature points in the scanned image. Optionally, adjustments can also be made directly in the original image to generate the corrected image.
[0065] S106: Control the laser to perform laser plate making based on the corrected image.
[0066] After obtaining the corrected image, the laser is controlled to perform laser direct plate making based on the corrected image. Specifically, the corrected image can first be rasterized, mapping the pixels in the corrected image onto the exposure surface of the halftone frame. The positions of the laser exposure points on the exposure surface are determined according to the mapping relationship. Finally, the laser direct plate making equipment or laser is controlled to expose the laser exposure points on the exposure surface, and the exposed surface is developed to form a pattern that meets the requirements on the halftone frame.
[0067] As disclosed above, in this embodiment, the original image is divided into multiple connected regions, and feature points of each connected region are identified. Feature points of the corresponding sub-images within the error region of each connected region are extracted from the scanned image. Then, the feature points of each connected region are matched with the feature points of their respective sub-image regions, and the position data of the successfully matched feature points in the scanned image is obtained. The positions of each connected region in the original image are adjusted to generate a corrected image, ensuring that the positions of the feature points in each connected region of the corrected image are consistent with the positions of the successfully matched feature points in the scanned image. Finally, the laser is controlled to expose the laser exposure points in the corrected image to the mapped positions on the screen frame. Because the feature points in the corrected image are nearly identical to the feature points in the image after printing offset, the image on the screen frame after laser exposure is nearly identical to the offset of the image after printing offset. This improves the matching degree between the local image on the printing surface and the mesh image of the screen frame during the later stages of printing, thus improving the production quality of the later stages of printing. Simultaneously, it avoids manual operations such as film production, cutting, and alignment in the film process, improving production efficiency.
[0068] It is understood that, in the various embodiments of this application, the sequence number of the above steps does not imply the order of execution. The execution order of each step should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. For example, steps S101 and S102 can be interchanged.
[0069] Optionally, in the above Figure 1Based on the illustrated embodiment, to further improve the efficiency of image feature point matching, in another possible embodiment of this application, before identifying the feature points of each connected region, a merging operation can be performed on the identified connected regions. The merging operation may include: determining whether the sum of the areas of adjacent connected regions (the area of a connected region is based on the area of the smallest rectangle enclosing the connected region) is greater than a preset threshold; if not, the adjacent connected regions are merged; if greater, the adjacent connected regions are not merged. For example... Figure 2 If the preset threshold is set to the area of the L-shaped image, then the connected component corresponding to the L-shaped image cannot be merged with the numeric image, while the numeric images (1, 2, 3, 4, 5) can be merged into a new connected component.
[0070] Optionally, in the above Figure 1 Based on the illustrated embodiment, to further improve the efficiency of image feature point matching, another possible embodiment of this application involves merging the identified connected regions before identifying feature points in each connected region. Specifically, the merging operation may include: determining whether the distance between the nearest points of adjacent connected regions is greater than a preset threshold; if not, merging the adjacent connected regions; if greater, not merging the adjacent connected regions. For example... Figure 2 If the preset threshold is less than the distance between the L-shaped image and the 1-shaped image but greater than the distance between the numeric images (1, 2, 3, 4, 5), then the connected component corresponding to the L-shaped image cannot be merged with the numeric image, while the numeric images (1, 2, 3, 4, 5) can be merged into a new connected component.
[0071] This invention also provides a laser direct plate making control method system, which may include:
[0072] The acquisition module is used to acquire a scanned image of the printed surface after printing based on the original image;
[0073] The first recognition module is used to traverse the original image to identify connected components in the image and identify feature points of each connected component.
[0074] The second recognition module is used to extract sub-image regions corresponding to each connected region in the scanned image based on the position of each recognized connected region in the original image, and to identify feature points of each sub-image region.
[0075] The matching module is used to match the feature points of each connected region with the feature points of their respective sub-image regions, and to obtain the position data of the successfully matched feature points in the scanned image.
[0076] The image processing module is used to adjust the positions of each connected region in the original image to generate a corrected image, so that the positions of the feature points of each connected region in the corrected image are consistent with the positions of the successfully matched feature points in the scanned image.
[0077] The control module controls the laser to perform laser plate making based on the corrected image.
[0078] Optionally, as one possible implementation, the laser-to-plate control method system may further include:
[0079] The merging module is used to perform a merging operation on the identified connected components. The merging operation includes: determining whether the sum of the areas of adjacent connected components is greater than a preset threshold; if it is not greater, then the adjacent connected components are merged; if it is greater, then the adjacent connected components are not merged.
[0080] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.
[0081] The laser direct plate making control method system in the embodiments of the present invention has been described above from the perspective of modular functional entities. Please refer to [link to relevant documentation]. Figure 3 The laser direct plate-making equipment in this embodiment of the invention will now be described from the perspective of hardware processing:
[0082] The laser-to-plate (Laser Direct Printing) device 1 may include a memory 11, a processor 12, and an input / output bus 13. The processor 11 executes the computer program to implement the above-mentioned... Figure 1 The laser direct plate making control method shown is, for example... Figure 1 Steps 101 to 106 are shown. Alternatively, the processor executes a computer program to implement the functions of each module or unit in the above-described device embodiments.
[0083] In some embodiments of the present invention, the processor is specifically used to implement the following steps:
[0084] Obtain a scanned image of the printed surface after printing based on the original image;
[0085] The original image is traversed to identify connected components in the image, and feature points of each connected region are identified.
[0086] Based on the position of each connected region in the original image, sub-image regions corresponding to each connected region are extracted from the scanned image, and feature points of each sub-image region are identified.
[0087] The feature points of each connected region are matched with the feature points of their respective sub-image regions, and the position data of the successfully matched feature points in the scanned image are obtained.
[0088] The positions of each connected region in the original image are adjusted to generate a corrected image, such that the positions of the feature points of each connected region in the corrected image are consistent with the positions of the successfully matched feature points in the scanned image.
[0089] The laser is controlled to perform laser plate making based on the corrected image.
[0090] Optionally, as one possible implementation, the processor can also be used to implement the following steps:
[0091] The identified connected components are merged. The merging operation includes: determining whether the sum of the areas of adjacent connected components is greater than a preset threshold; if it is not greater, the adjacent connected components are merged; if it is greater, the adjacent connected components are not merged.
[0092] Optionally, as a possible implementation, the processor can also be used to perform the following steps: matching the image feature points of each connected region in the corresponding sub-image regions of multiple scanned images, thereby obtaining the position data of the feature points of a single connected region in multiple scanned images;
[0093] Calculate intermediate data of the position data of feature points of a single connected region in multiple scanned images, and use the intermediate data as the position data of the corresponding connected region in the scanned images.
[0094] Optionally, as one possible implementation, the processor can also be used to implement the following steps:
[0095] The images of each connected region in the original image are transferred to a blank template to generate a corrected image, so that the positions of the feature points of each connected region in the corrected image are consistent with the positions of the successfully matched feature points in the scanned image.
[0096] The memory 11 includes at least one type of readable storage medium, including flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 11 can be an internal storage unit of the laser-to-plate (Laser Direct Plate Making) apparatus 1, such as the hard disk of the Laser Direct Plate Making apparatus 1. In other embodiments, the memory 11 can also be an external storage device of the Laser Direct Plate Making apparatus 1, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, Flash Card, etc., equipped on the Laser Direct Plate Making apparatus 1. Furthermore, the memory 11 can include both internal storage units and external storage devices of the Laser Direct Plate Making apparatus 1. The memory 11 can be used not only to store application software and various types of data installed on the Laser Direct Plate Making apparatus 1, such as computer program code, but also to temporarily store data that has been output or will be output.
[0097] In some embodiments, processor 12 may be a central processing unit (CPU), controller, microcontroller, microprocessor or other data processing chip, used to run program code stored in memory 11 or process data, such as executing computer programs.
[0098] The input / output bus 13 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. This bus can be divided into address bus, data bus, control bus, etc.
[0099] Furthermore, the laser direct plate making equipment may also include a wired or wireless network interface 14. The network interface 14 may optionally include a wired interface and / or a wireless interface (such as a WI-FI interface, Bluetooth interface, etc.), which is typically used to establish a communication connection between the laser direct plate making equipment 1 and other electronic devices.
[0100] Figure 3 Only the laser-to-plate apparatus 1 with components 11-14 and computer programs is shown; those skilled in the art will understand that... Figure 3 The structure shown does not constitute a limitation on the laser direct printing equipment 1, and may include fewer or more components than shown, or combine certain components, or have different component arrangements.
[0101] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, can perform the functions described above. Figure 1 The laser direct plate making control method shown is, for example... Figure 1 Steps 101 to 106 are shown. Alternatively, the processor executes a computer program to implement the functions of each module or unit in the above-described device embodiments.
[0102] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.
[0103] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0104] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.
[0105] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0106] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A laser direct plate making control method, characterized in that, include: Obtain a scanned image of the printed surface after printing based on the original image; The original image is traversed to identify connected components in the image, and feature points of each connected region are identified. Based on the position of each connected region in the original image, sub-image regions corresponding to each connected region are extracted from the scanned image, and feature points of each sub-image region are identified. The feature points of each connected region are matched with the feature points of their respective sub-image regions, and the position data of the successfully matched feature points in the scanned image are obtained. The positions of each connected region in the original image are adjusted to generate a corrected image, such that the positions of the feature points of each connected region in the corrected image are consistent with the positions of the successfully matched feature points in the scanned image. The laser is controlled to perform laser plate making based on the corrected image.
2. The laser direct plate making control method according to claim 1, characterized in that, Before identifying feature points in each connected region, the method further includes: The identified connected components are merged. The merging operation includes: determining whether the sum of the areas of adjacent connected components is greater than a preset threshold; if it is not greater, the adjacent connected components are merged; if it is greater, the adjacent connected components are not merged.
3. The laser direct plate making control method according to claim 1, characterized in that, Before identifying feature points in each connected region, the method further includes: The identified connected components are merged. The merging operation includes: determining whether the distance between the nearest points of adjacent connected components is greater than a preset threshold; if it is not greater, the adjacent connected components are merged; if it is greater, the adjacent connected components are not merged.
4. The laser direct plate making control method according to any one of claims 1 to 3, characterized in that, The step of obtaining a scanned image of the printed surface after printing based on the original image includes: scanning multiple printed surfaces after printing based on the original image to obtain multiple scanned images. The step of matching feature points of each connected region with feature points of their respective sub-image regions and obtaining the position data of the successfully matched feature points in the scanned image includes: The image feature points of each connected region are matched in the corresponding sub-image regions of multiple scanned images to obtain the position data of the feature points of a single connected region in multiple scanned images. Calculate the intermediate data of the position data of a single connected region feature point in multiple scanned images, and use the intermediate data as the position data of the corresponding connected region in the scanned images; the intermediate data is the average value of the position data of a single connected region in multiple scanned images, or the position data of a single connected region in multiple scanned images with the position data sorted in the middle.
5. The laser direct plate making control method according to any one of claims 1 to 3, characterized in that, The step of adjusting the positions of each connected region in the original image to generate the corrected image includes: The images of each connected region in the original image are transferred to a blank template to generate a corrected image, so that the positions of the feature points of each connected region in the corrected image are consistent with the positions of the successfully matched feature points in the scanned image.
6. A laser-to-plate control system, characterized in that, include: The acquisition module is used to acquire a scanned image of the printed surface after printing based on the original image; The first recognition module is used to traverse the original image to identify connected components in the image and identify feature points of each connected component. The second recognition module is used to extract sub-image regions corresponding to each connected region in the scanned image based on the position of each recognized connected region in the original image, and to identify feature points of each sub-image region. The matching module is used to match the feature points of each connected region with the feature points of their respective sub-image regions, and to obtain the position data of the successfully matched feature points in the scanned image. The image processing module is used to adjust the positions of each connected region in the original image to generate a corrected image, so that the positions of the feature points of each connected region in the corrected image are consistent with the positions of the successfully matched feature points in the scanned image. The control module controls the laser to perform laser plate making based on the corrected image.
7. The laser-to-plate control system according to claim 6, characterized in that, Also includes: The merging module is used to perform a merging operation on the identified connected components. The merging operation includes: determining whether the sum of the areas of adjacent connected components is greater than a preset threshold; if it is not greater, then the adjacent connected components are merged; if it is greater, then the adjacent connected components are not merged.
8. A laser-to-plate (DTP) device, characterized in that, The laser direct plate making device includes a processor, which executes a computer program stored in a memory to implement the method as described in any one of claims 1 to 5.
9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 5.