Methods, systems and related equipment for dilation and contraction correction during laser imaging

Abstract

This invention provides a method, system, and related equipment for correcting dilation and contraction during laser imaging, used to eliminate or reduce irregular dilation and contraction during laser imaging and improve the accuracy of laser imaging. The method includes: dividing the image area after exposure and development into multiple development regions, and detecting the actual deviation between the position of the marker point in the development region corresponding to each laser source and its theoretical position to form an input sequence; inputting the input sequence into a preset initial model to train an offset model, and inputting the position of the exposure point in the image to be exposed into the offset model to calculate the offset of each exposure point; and performing a reverse equal-amount adjustment on the offset corresponding to the exposure point in the image to be exposed to obtain a corrected image for laser scanning imaging.

Description

Technical Field

[0001] This invention relates to the field of laser direct imaging technology, and in particular to methods, systems and related equipment for correction of expansion and contraction during laser imaging. Background Technology

[0002] Direct laser imaging refers to generating the desired image on a photosensitive emulsion surface by exposing pixels to a laser beam. Common direct laser imaging methods include DMD (Digital Micromirror Device)-based laser imaging and laser array scanning imaging.

[0003] Existing laser imaging technology based on DMD (Digital Micromirror Device) exposes the entire area coated with photosensitive emulsion for imaging. The photosensitive emulsion in this area is cured and formed at the same time, and the entire image area exhibits a uniform thermal expansion and contraction phenomenon. In this case, it is only necessary to enlarge or reduce the image as a whole proportionally.

[0004] The applicant discovered that when using laser array scanning imaging technology, because the image is exposed line by line by line using a laser, the expansion and contraction of the first exposed areas are the most obvious, while the expansion and contraction of the subsequently exposed areas become less obvious until the last exposed area has no expansion and contraction. The final image exhibits uneven expansion and contraction due to the different exposure order, resulting in an image developed by the photosensitive emulsion after exposure. Therefore, the image error caused by uneven expansion and contraction cannot be corrected using the same method as DMD (Digital Micromirror Device)-based laser imaging technology (which involves proportional magnification or reduction of the entire image).

[0005] How to reduce or eliminate image errors caused by uneven expansion and contraction during laser scanning has become an urgent problem to be solved in the field of laser scanning imaging technology. Summary of the Invention

[0006] This invention provides a method, system, and related equipment for correcting expansion and contraction during laser imaging, which can eliminate or reduce irregular expansion and contraction during laser imaging and improve the accuracy of laser imaging.

[0007] The first aspect of this invention provides a method for correcting dilation and contraction during laser imaging, which may include:

[0008] The image area after exposure and development is divided into multiple developed areas, and the actual deviation value between the position of the marker point in each developed area and the theoretical position is detected to form an input sequence. The input sequence is then input into a preset initial model for training to obtain an offset model.

[0009] Input the positions of the exposure points in the image to be exposed into the offset model to calculate the offset of each exposure point;

[0010] The offset corresponding to the exposure point in the image to be exposed is adjusted in the opposite direction by the same amount to obtain a corrected image for laser scanning imaging.

[0011] Optionally, as a possible implementation, in this embodiment of the invention, training the offset model by inputting the input sequence into a preset initial model may include:

[0012] According to r = s / ∑(1 / d) i 2 Calculate the marker offset parameter r for each region, where s is the actual deviation value corresponding to the current marker point, and d... i is the distance between the remaining marker points and the current marker point, and i is the relative label of each region;

[0013] According to s=r*∑(1 / d) i 2 Establish the offset matrix of marker points for each region;

[0014] An offset mapping model for arbitrary exposure points is established based on the linear proportional relationship between the exposure time of any exposure point and the corresponding marker point in each region.

[0015] Optionally, as a possible implementation, in this embodiment of the invention, the image area after exposure and development is divided into multiple developing areas, which may include:

[0016] The image area after exposure and development is divided into development areas equal to the number of laser light sources.

[0017] Optionally, as a possible implementation, in this embodiment of the invention, the image area after exposure and development is divided into multiple developing areas, which may include:

[0018] The number of developed regions in the image after exposure and development is an integer multiple of the number of laser light sources.

[0019] A second aspect of this invention provides a dilation / contraction correction system for laser imaging, which may include:

[0020] The detection module is used to divide the image area after exposure and development into multiple developed areas, and to detect the actual deviation between the position of the marker point in each developed area and the theoretical position to form an input sequence.

[0021] The calculation module is used to input the input sequence into a preset initial model to train an offset model, and input the position of the exposure point in the image to be exposed into the offset model to calculate the offset of each exposure point;

[0022] The adjustment module is used to reverse and equalize the offset of the exposure point in the image to be exposed to obtain a corrected image for laser scanning imaging.

[0023] Optionally, as a possible implementation, in this embodiment of the invention, the computing module may include:

[0024] The first calculation unit, based on r = s / ∑(1 / d) i 2 Calculate the marker offset parameter r for each region, where s is the actual deviation value corresponding to the current marker point, and d... i is the distance between the remaining marker points and the current marker point, and i is the relative label of each region;

[0025] The second calculation unit, based on s=r*∑(1 / d) i 2 Establish the offset matrix of marker points for each region;

[0026] The third calculation unit establishes an offset mapping model for arbitrary exposure points based on the linear proportional relationship between the exposure time of any exposure point and the corresponding marker point in each region.

[0027] Optionally, as a possible implementation, in this embodiment of the invention, the detection module may include:

[0028] The first detection unit is used to divide the image area after exposure and development into development areas equal to the number of laser light sources, and to detect the actual deviation between the position of the marker point in each development area and the theoretical position to form an input sequence.

[0029] Optionally, as a possible implementation, in this embodiment of the invention, the detection module may include:

[0030] The second detection unit is used to divide the image region after exposure and development into regions whose number of developed regions is an integer multiple of the number of laser light sources, and to detect the actual deviation value between the position of the marker point in each developed region and the theoretical position to form an input sequence.

[0031] A third aspect of the present invention provides a computer device, the computer device including a processor, the processor being configured to execute a computer program stored in a memory to implement the steps of the first aspect and any possible implementation thereof.

[0032] 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.

[0033] As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:

[0034] In this embodiment of the invention, the image area after exposure and development is pre-divided into multiple development regions. An input sequence is formed based on the actual deviation between the position of the marked point in the development region corresponding to each laser source and its theoretical position. This input sequence is then used to train a preset initial model to obtain an offset model. With the laser position remaining unchanged in the laser array, during a new production process, the position of the exposure point in the image to be exposed is input into the offset model to predict and calculate the offset of each exposure point. This offset is then adjusted inversely and by the same amount to obtain a corrected image for laser scanning imaging. After exposure imaging based on the exposure point positions in the corrected image, the offset of the corrected offset in the corrected image is canceled out by irregular expansion and contraction. Consequently, the deviation between the actual exposure position and the exposure point position in the image to be exposed is reduced or eliminated, improving the accuracy of laser imaging. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of an embodiment of a dilatation correction method in laser imaging according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of one embodiment of a computer device according to an embodiment of the present invention. Detailed Implementation

[0037] 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.

[0038] The terms "first," "second," "third," "fourth," 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.

[0039] In the description of this application, unless otherwise stated, "a plurality of" means two or more. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.

[0040] For ease of understanding, the laser array in this embodiment of the invention will be described below. This laser array consists of laser light sources arranged non-overlapping in the scanning vertical direction. Their positional distribution in the scanning direction can overlap or not, as long as the relative positions of each laser remain fixed. The specific process in this embodiment of the invention is described below; please refer to [link / reference]. Figure 1 One embodiment of a method for correcting dilation and contraction during laser imaging according to the present invention may include:

[0041] S101: Divide the image area after exposure and development into multiple development areas, and detect the actual deviation between the position of the marker point in the development area corresponding to each laser source and the theoretical position to form an input sequence;

[0042] During the laser array scanning imaging process, the applicant discovered that because each laser in the laser array exposes different areas, the order in which the pixel rows of different areas are exposed is different. The area exposed first has a certain stretching effect on the area exposed later, resulting in an irregular expansion and contraction phenomenon in the final developed image.

[0043] To eliminate or reduce irregular expansion and contraction, the applicant proposes that, before mass production, the offset of the developing areas of different lasers be calculated separately, and the actual deviation between the position of the marked point in each developing area and the theoretical position be detected to form an input sequence. This input sequence is then fed into a preset initial model for training to obtain an offset model. Since the position of the lasers in the laser array remains unchanged, the relative position of the subsequent exposure areas remains unchanged, and the deviation of irregular expansion and contraction is also similar. After the model training is completed, when the same laser array is used again for exposure imaging, the image to be exposed can be adjusted in reverse and by the same amount, so that the offset after exposure is canceled out, thereby reducing or eliminating laser imaging errors caused by uneven expansion and contraction during laser scanning.

[0044] Therefore, in this embodiment of the invention, the image area after exposure and development is divided into multiple development areas (the number of each development area can be equal to the number of laser light sources, or an integer multiple of the number of laser light sources), and the actual deviation value between the position of the marker point in each development area and the theoretical position is detected to form an input sequence. The input sequence is then input into a preset initial model for training to obtain an offset model.

[0045] In this application embodiment, the applicant discovered that the interaction force between different exposure areas is inversely proportional to the square of the distance. Therefore, the positional offset s of other areas outside any area (e.g., the target area) relative to the target area is... i With d i There is also an inverse proportional relationship between them, where i is the relative label of each region. The actual deviation s between the detected position of the marker point in each region and the theoretical position can be used as s. i The sum. Based on the above model analysis, for example, in the embodiments of this application, the process of inputting the input sequence into a preset initial model for training to obtain the offset model may include: according to r = s / ∑(1 / d i 2 Calculate the marker offset parameter r for each region, where s is the actual deviation value corresponding to the current marker point, and d... i Let be the distances between the remaining marker points and the current marker point; then, according to s = r * ∑(1 / d) i 2 Establish the offset matrix of marker points for each region; finally, establish the offset mapping model of arbitrary exposure points based on the linear proportional relationship between the exposure time of any exposure point in each region and the corresponding marker point in that region.

[0046] It is understandable that the above modeling process is merely exemplary; in practical applications, it can also be based on s i With d i There exists an inverse proportional correlation to establish other forms of univariate function relationships, and then establish a corresponding preset initial model to approximate the simulation calculation of the offset. The specifics are not limited here.

[0047] S102: Input the input sequence into the preset initial model to train the offset model, and input the position of the exposure point in the image to be exposed into the offset model to calculate the offset of each exposure point;

[0048] After training the preset initial model to obtain the offset model, the positions of the exposure points in the image to be exposed can be input into the offset model to calculate the offset of each exposure point.

[0049] S103: Adjust the offset of the exposure point in the image to be exposed in the opposite direction by the same amount to obtain a corrected image for laser scanning imaging.

[0050] After obtaining the offset of each exposure point, the offset of the corresponding exposure point in the image to be exposed is adjusted in reverse by the same amount to obtain the corrected image for laser scanning imaging. For example, after irregular dilation and expansion offset, the actual position of the coordinate point (1,1) will become (1+dx, 1+dy). After the offset model predicts the dx and dy of this point, the pixel position of the coordinate point (1,1) in the image is moved to (1-dx, 1-dy). In this way, after irregular dilation and expansion offset, it cancels the correction offset in the corrected image, and the actual position obtained is at (1,1), which is consistent with the theoretical position of the exposure point in the exposed image.

[0051] As disclosed above, in this embodiment, an input sequence can be formed based on the actual deviation between the position of the marked point in each developing area corresponding to each laser in each laser array and the theoretical position. This input sequence is then used to train a preset initial model to obtain an offset model. With the laser positions in the laser array unchanged, in a new production process, the position of the exposure point in the image to be exposed is input into the offset model to predict and calculate the offset of each exposure point. This offset is then adjusted inversely and by the same amount to the pre-defined offset of the exposure point in the image to be exposed, resulting in a corrected image for laser scanning imaging. After exposure imaging is performed based on the exposure point positions in the corrected image, the offset of the corrected offset in the corrected image is canceled out by irregular expansion and contraction. Consequently, the deviation between the actual exposure position and the exposure point position in the image to be exposed is reduced or eliminated, improving the accuracy of laser imaging.

[0052] This application also provides a dilation and contraction correction system for laser imaging, which may include:

[0053] The detection module is used to divide the image area after exposure and development into multiple developed areas, and to detect the actual deviation between the position of the marker point in each developed area and the theoretical position to form an input sequence.

[0054] The calculation module is used to input the input sequence into a preset initial model to train the offset model, and input the position of the exposure point in the image to be exposed into the offset model to calculate the offset of each exposure point;

[0055] The adjustment module is used to reverse and equalize the offset of the exposure point in the image to be exposed, so as to obtain a corrected image for laser scanning imaging.

[0056] Optionally, as a possible implementation, in this embodiment of the invention, the computing module may include:

[0057] The first calculation unit, based on r = s / ∑(1 / d) i 2 Calculate the marker offset parameter r for each region, where s is the actual deviation value corresponding to the current marker point, and d...i is the distance between the remaining marker points and the current marker point, and i is the relative label of each region;

[0058] The second calculation unit, based on s=r*∑(1 / d) i 2 Establish the offset matrix of marker points for each region;

[0059] The third calculation unit establishes an offset mapping model for arbitrary exposure points based on the linear proportional relationship between the exposure time of any exposure point and the corresponding marker point in each region.

[0060] Optionally, as a possible implementation, in this embodiment of the invention, the detection module may include:

[0061] The first detection unit is used to divide the image area after exposure and development into development areas equal to the number of laser light sources, and to detect the actual deviation between the position of the marker point in each development area and the theoretical position to form an input sequence.

[0062] Optionally, as a possible implementation, in this embodiment of the invention, the detection module may include:

[0063] The second detection unit is used to divide the image region after exposure and development into regions whose number of developed regions is an integer multiple of the number of laser light sources, and to detect the actual deviation value between the position of the marker point in each developed region and the theoretical position to form an input sequence.

[0064] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0065] The above description of the dilatation correction system in the laser imaging process of this invention from the perspective of modular functional entities is provided. Please refer to [link to relevant documentation]. Figure 2 The computer device in the embodiments of the present invention will now be described from the perspective of hardware processing:

[0066] The computer device 1 may include a memory 11, a processor 12, and an input / output bus 13. The processor 12 executes the computer program to implement the above-described... Figure 1 The steps in the method embodiments shown, for example Figure 1 Steps 101 to 103 are shown. Alternatively, the processor executes a computer program to implement the functions of each module or unit in the above-described device embodiments.

[0067] 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 computer device 1, such as the hard disk of the computer device 1. In other embodiments, the memory 11 can be an external storage device of the computer device 1, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the computer device 1. Furthermore, the memory 11 can include both internal storage units and external storage devices of the computer device 1. The memory 11 can be used not only to store application software and various types of data installed on the computer device 1, such as computer program code, but also to temporarily store data that has been output or will be output.

[0068] 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.

[0069] 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.

[0070] Furthermore, the computer device may also include a wired or wireless network interface 14, which may optionally include a wired interface and / or a wireless interface (such as a Wi-Fi interface, a Bluetooth interface, etc.), typically used to establish communication connections between the computer device 1 and other electronic devices.

[0071] Optionally, the computer device 1 may further include a user interface, which may include a display, an input unit such as a keyboard, and optionally, a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen, etc. The display may also be appropriately referred to as a screen or display unit, used to display information processed in the computer device 1 and to display a visual user interface.

[0072] Figure 2 Only computer device 1 with components 11-14 and computer programs is shown; those skilled in the art will understand that... Figure 2 The structure shown does not constitute a limitation on the computer device 1, and may include fewer or more components than shown, or combine certain components, or have different component arrangements.

[0073] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, can perform the following functions: Figure 1 Steps 101 to 103 are shown. Alternatively, the processor executes a computer program to implement the functions of each module or unit in the above-described device embodiments.

[0074] In the embodiments provided in this application, it should be understood that the disclosed systems, modules, and units can be implemented in other ways. For example, the system 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 through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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 method for correcting dilation and contraction during laser imaging, characterized in that, A laser array used for scanning non-overlapping laser sources arranged in the vertical direction includes: The image area after exposure and development is divided into multiple developed areas, and the actual deviation between the position of the marker point in the developed area corresponding to each laser source and the theoretical position is detected to form an input sequence. The input sequence is input into a preset initial model to train the offset model, and the position of the exposure point in the image to be exposed is input into the offset model to calculate the offset of each exposure point; The offset corresponding to the exposure point in the image to be exposed is adjusted in the opposite direction by the same amount to obtain a corrected image for laser scanning imaging.

2. The method according to claim 1, characterized in that, The input sequence is input into a preset initial model for training to obtain an offset model, including: According to r = s / ∑(1 / d) i 2 Calculate the marker offset parameter r for each region, where s is the actual deviation value corresponding to the current marker point, and d... i is the distance between the remaining marker points and the current marker point, and i is the relative label of each region; According to s=r*∑(1 / d) i 2 Establish the offset matrix of marker points for each region; An offset mapping model for arbitrary exposure points is established based on the linear proportional relationship between the exposure time of any exposure point and the corresponding marker point in each region.

3. The method according to claim 1 or 2, characterized in that, The image area after exposure and development is divided into multiple developed areas, including: The image area after exposure and development is divided into development areas equal to the number of laser light sources.

4. The method according to claim 1 or 2, characterized in that, The image area after exposure and development is divided into multiple developed areas, including: The number of developed regions in the image after exposure and development is an integer multiple of the number of laser light sources.

5. A dilation and contraction correction system for laser imaging, characterized in that, include: The detection module is used to divide the image area after exposure and development into multiple developed areas, and to detect the actual deviation between the position of the marker point in each developed area and the theoretical position to form an input sequence. The calculation module is used to input the input sequence into a preset initial model to train an offset model, and input the position of the exposure point in the image to be exposed into the offset model to calculate the offset of each exposure point; The adjustment module is used to reverse and equalize the offset of the exposure point in the image to be exposed to obtain a corrected image for laser scanning imaging.

6. The system according to claim 5, characterized in that, The calculation module includes: The first calculation unit, based on r = s / ∑(1 / d) i 2 Calculate the marker offset parameter r for each region, where s is the actual deviation value corresponding to the current marker point, and d... i is the distance between the remaining marker points and the current marker point, and i is the relative label of each region; The second calculation unit, based on s=r*∑(1 / d) i 2 Establish the offset matrix of marker points for each region; The third calculation unit establishes an offset mapping model for arbitrary exposure points based on the linear proportional relationship between the exposure time of any exposure point and the corresponding marker point in each region.

7. The system according to claim 5 or 6, characterized in that, The detection module includes: The first detection unit is used to divide the image area after exposure and development into development areas equal to the number of laser light sources, and to detect the actual deviation between the position of the marker point in each development area and the theoretical position to form an input sequence.

8. The system according to claim 5 or 6, characterized in that, The detection module includes: The second detection unit is used to divide the image region after exposure and development into regions whose number of developed regions is an integer multiple of the number of laser light sources, and to detect the actual deviation value between the position of the marker point in each developed region and the theoretical position to form an input sequence.

9. A computer device, characterized in that, The computer device includes a processor that executes a computer program stored in a memory to implement the method as described in any one of claims 1 to 4.

10. 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 4.

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