CN113888449B - Image processing method and system for laser imaging and related equipment - Google Patents
Image processing method and system for laser imaging and related equipment Download PDFInfo
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Abstract
The embodiment of the application provides an image processing method and system for laser imaging and related equipment, which are used for improving the laser imaging precision. An embodiment method may comprise: acquiring the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction as an initial offset value, and determining the maximum initial offset value; taking the spot center of the target laser corresponding to the maximum initial offset value as a reference point of laser scanning, and calculating the offset of the spot centers of other lasers except the target laser relative to the reference point in the laser scanning direction as a calibration offset value; and acquiring an original binary dot matrix image, taking the scanning direction as a correction direction, taking calibration offset values corresponding to other lasers as respective correction distances, moving pixel rows scanned by the other lasers in the original binary dot matrix image, and forming new pixel rows by the pixels after moving to replace original pixel rows to form a correction image.
Description
Technical Field
The present application relates to the field of image data processing technologies, and in particular, to an image processing method and system for laser imaging and a related device.
Background
The laser direct imaging means controlling the laser to irradiate the photosensitive coating on the exposure surface to perform image exposure, and generating a preset image after developing. Compared with the traditional process, the laser direct imaging technology does not need to manufacture a mask, reduces the process complexity, saves the production cost, and can be applied to the fields of screen printing plate making, PCB manufacturing and the like.
In order to improve the laser imaging efficiency, a plurality of lasers are arranged in laser direct imaging equipment in the related technology (application number: 201310084860.3, laser direct plate making device and method for a flat screen printing plate) along a straight line at equal intervals to form a laser array, and the laser array is controlled to scan an exposure surface along the laser scanning direction, so that the plurality of lasers can expose a plurality of rows of pixel points on the exposure surface at one time; and after one-time scanning is finished, the laser is moved along the direction vertical to the scanning direction so as to sequentially perform scanning exposure on the rest exposure surfaces.
In the related art, a straight line (Y direction) where the laser array is located is often set to be perpendicular to the laser scanning direction, so that the coordinate values of the laser scanning directions of the plurality of lasers are regarded as the same, and the coordinate value of the laser scanning direction of one laser is taken as the coordinate value of the laser scanning directions of all the lasers. Due to factors such as installation error of the laser, spot offset of the laser on the exposure surface, and the like, the coordinate values of the spots of the laser on the exposure surface in the X direction may be different. If the laser is controlled to expose according to the position of the laser exposure point on the acquired original dot matrix image, due to the deviation of the light spot in the X direction, the developed image after development has line pixel shift in the X direction, which causes the developed image to be distorted relative to the template image. When the laser has errors such as installation, spot deviation and the like, how to ensure the laser imaging precision becomes a problem to be solved urgently.
Disclosure of Invention
The embodiment of the application provides an image processing method and system for laser imaging and related equipment, which are used for improving the laser imaging precision.
A first aspect of the embodiments of the present application provides an image processing method for laser imaging, which may include:
acquiring the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction as an initial offset value, and determining the maximum initial offset value;
taking the spot center of the target laser corresponding to the maximum initial offset value as a reference point of laser scanning, and calculating the offset of the spot centers of other lasers except the target laser relative to the reference point in the laser scanning direction as a calibration offset value;
and acquiring an original binary dot matrix image, taking the scanning direction as a correction direction, taking calibration offset values corresponding to other lasers as respective correction distances, moving pixel rows scanned by the other lasers in the original binary dot matrix image, and forming new pixel rows by the pixels after moving to replace original pixel rows to form a correction image.
Optionally, as a possible implementation manner, in this embodiment of the application, before moving the pixel rows scanned by the other lasers in the original binary dot matrix image, the method further includes:
acquiring a step distance d of moving the center of a light spot of a laser in the laser array by one step in the Y-axis direction of an exposure surface; the Y-axis direction is perpendicular to the laser scanning direction;
acquiring the distance L of the centers of light spots of adjacent lasers on the laser array in the Y-axis direction of the exposure surface;
the number of pixel rows that each laser needs to scan is calculated from the ratio of L to d.
Optionally, as a possible implementation manner, in this embodiment of the application, the acquiring, as an initial offset value, an offset of a center of a spot of each laser on the laser array with respect to a calibration point in a laser scanning direction includes:
and calculating the adjacent offset value of the spot center of the adjacent laser in the laser scanning direction on the laser array by adopting an image recognition algorithm, and calculating the offset of the spot center of each laser relative to the calibration point in the laser scanning direction as an initial offset value on the basis of the adjacent offset value.
Optionally, as a possible implementation manner, in this embodiment of the application, the acquiring, as an initial offset value, an offset of a center of a spot of each laser on the laser array with respect to a calibration point in a laser scanning direction includes:
and calculating the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction by adopting an image recognition algorithm as an initial offset value.
A second aspect of an embodiment of the present application provides an image processing system, which may include:
the first acquisition module is used for acquiring the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction as an initial offset value and determining the maximum initial offset value;
the first processing module is used for taking the spot center of the target laser corresponding to the maximum initial offset value as a reference point of laser scanning, and calculating the offset of the spot centers of other lasers except the target laser relative to the reference point in the laser scanning direction as a calibration offset value;
and the second processing module is used for acquiring an original binary dot matrix image, taking the scanning direction as a correction direction, taking the calibration deviation values corresponding to the other lasers as respective correction distances, moving the pixel lines scanned by the other lasers in the original binary dot matrix image, and forming new pixel lines by using the pixels after moving to replace the original pixel lines to form a correction image.
Optionally, as a possible implementation manner, the image processing system in the embodiment of the present application may further include:
the second acquisition module is used for acquiring the step distance d of moving the spot center of the laser in the laser array by one step in the Y-axis direction of the exposure surface; the Y-axis direction is perpendicular to the laser scanning direction;
the third acquisition module is used for acquiring the distance L of the centers of the light spots of the adjacent lasers on the laser array in the Y-axis direction of the exposure surface;
and the third processing module is used for calculating the number of pixel rows required to be scanned by each laser according to the ratio of the L to the d.
Optionally, as a possible implementation manner, in an embodiment of the present application, the first obtaining module may include:
the first calculation unit calculates the adjacent offset value of the spot center of the adjacent laser in the laser scanning direction on the laser array by adopting an image recognition algorithm, and calculates the offset of the spot center of each laser relative to the calibration point in the laser scanning direction as an initial offset value based on the adjacent offset value.
Optionally, as a possible implementation manner, in an embodiment of the present application, the first obtaining module may include:
and the second calculating unit calculates the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction by adopting an image recognition algorithm as an initial offset value.
A third aspect of embodiments of the present application provides a laser imaging apparatus, where the laser imaging apparatus includes a processor, and the processor is configured to implement the steps in any one of the possible implementations of the first aspect and the first aspect when executing a computer program stored in a memory.
A fourth aspect of embodiments of the present application 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 application has the following advantages:
in the embodiment of the application, the spot center with the maximum deviation in the laser scanning direction relative to the calibration point is used as the reference point of laser scanning, calibration deviation values of the spot centers of other lasers in the laser scanning direction relative to the reference point are calculated, then the scanning direction is used as the correction direction, the calibration deviation values corresponding to other lasers are used as respective correction distances, pixel lines scanned by other lasers are moved in an original binary dot matrix image, pixels after the movement form a new pixel line to replace the original pixel line to form a correction image, so that in the exposure imaging process of a laser imaging device based on the correction image, the deviation of the spot center of the laser in the laser scanning direction can be offset, and the precision of laser imaging is improved.
Drawings
Fig. 1 is a schematic diagram of an embodiment of an image processing method for laser imaging according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a possible distribution of the laser arrays in the center of the light spot on the exposure surface;
fig. 3 is a schematic diagram of pixel row distribution that light spots corresponding to points a to H in an original binary dot matrix image need to be scanned;
FIG. 4 is a schematic diagram of pixel row distribution to be scanned for light spots corresponding to points A to H in a corrected image;
fig. 5 is a schematic diagram of an embodiment of a laser imaging apparatus according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description and claims of the present application and in the above-described drawings, the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The term "comprises" and any variations thereof is intended to cover non-exclusive inclusions. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
For ease of understanding, a detailed flow in the embodiment of the present application is described below, and referring to fig. 1, an embodiment of an image processing method for laser imaging in the embodiment of the present application may include:
s101: and acquiring the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction as an initial offset value, and determining the maximum initial offset value.
The applicant notices that in the design principle of the laser imaging device in the related art, a plurality of lasers are arranged and distributed equidistantly along a straight line to form a laser array, and the laser spots distributed in the straight line are expected to be obtained. However, in the actual equipment assembling process, due to the influence of factors such as the installation error of the laser, the spot offset of the laser on the exposure surface and the like, the spots of the laser on the exposure surface are not in a straight line. If the laser is controlled to perform exposure according to the coordinates of a single index point, the developed image after development may have line pixel shift in the X direction (parallel to the laser scanning direction), resulting in distortion of the developed image relative to the template image.
In order to solve the above problem, in the embodiment of the present application, the laser imaging apparatus re-determines the reference point of the laser scanning according to the deviation amount of the spot center of each laser in the laser scanning direction, determines the calibration deviation value of the spot center of the other laser in the laser scanning direction relative to the reference point based on the reference point, and finally corrects the calibration deviation value. It should be noted that, in the present application, the light spot center of the laser is defined for convenience of description, and may be a position of a light spot in the light spot of the laser, which may be uniquely calibrated, for example, a center of a circle of the light spot, a center of gravity of an irregular pattern light spot, or a midpoint of an overlapping portion of a light spot image and a preset straight line, and only needs to ensure that standards for determining the centers of the light spots are consistent, and specific details are not limited herein.
Therefore, in the embodiment of the present application, an offset of a spot center of each laser on the laser array with respect to the calibration point in the laser scanning direction may be obtained as an initial offset value, and then, image correction may be performed based on the initial offset value. In order to improve the efficiency of laser imaging, it is preferable that a spot that is first exposed on the exposure surface be used as a reference point, that is, a spot corresponding to the largest initial offset value be determined as a reference point. Illustratively, as shown in FIG. 2, if the laser scanning direction is the X-axis direction in FIG. 2, the spots of the laser array on the exposure surface are points A to H in the figure, the selected calibration points are points O, and the initial offset values (which may take positive or negative values) for the points O are 4, 2, -1, 2, -3, 1 and-5, respectively. The magnitude of the positive and negative values were compared, and the maximum initial offset value was 4, as can be seen from the above data. Therefore, the spot that first exposes the exposure surface can be determined as the a point.
Specifically, the offset of the spot center of each laser relative to the calibration point in the laser scanning direction can be measured by using a relative calibration mode and an absolute calibration mode. The relative calibration means that: and calculating the adjacent offset value of the adjacent laser in the laser scanning direction on the laser array by adopting an image recognition algorithm, and calculating the offset of the spot center of each laser relative to the calibration point in the laser scanning direction on the basis of the adjacent offset value. Absolute calibration means: and directly calculating the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction by adopting an image recognition algorithm. For example, the existing image recognition algorithm which can be matched based on a quadratic element measuring instrument can perform rapid measurement, and the specific image recognition algorithm is not limited herein.
S102: and taking the spot center of the target laser corresponding to the maximum initial offset value as a reference point of laser scanning, and calculating the offset of the spot centers of other lasers except the target laser relative to the reference point in the laser scanning direction as a calibration offset value.
After the spot center of the target laser corresponding to the largest initial offset value is selected as the reference point of the laser scanning, the offset amount of the spot centers of the other lasers than the target laser in the laser scanning direction from the reference point may be calculated as the calibration offset value.
For example, taking the application scenario shown in fig. 2 as an example, taking the spot a point that is first exposed on the exposure surface as a reference point, the calibration offset values of the points B to H relative to the point a in fig. 2 can be calculated to be 2, 5, 2, 7, 3, and 9, respectively, and the specific unit of the calibration offset value can be set reasonably according to the actual coordinate system, which is not limited herein.
S103: and acquiring an original binary dot matrix image, taking the scanning direction as the correction direction, taking the calibration offset values corresponding to other lasers as respective correction distances, moving pixel rows scanned by other lasers in the original binary dot matrix image, and forming new pixel rows by using the moved pixels to replace the original pixel rows to form a correction image.
In the laser imaging process, the obtained original image needs to be subjected to rasterization processing first and converted into a binary dot matrix image, and the original image which is obtained first can be converted into the original binary dot matrix image in the application. The pixel points in the original binary dot matrix image are divided into two types, one type is a laser exposure point, and the other type is a point which does not need laser exposure.
After the calibration offset values of the reference point and the centers of the spots of the lasers other than the target laser in the laser scanning direction relative to the reference point are determined, the scanning direction can be used as a correction direction, the calibration offset values corresponding to the other lasers can be used as respective correction distances, pixel lines scanned by the other lasers are moved in the original binary dot matrix image, and the pixels after the movement are combined into a new pixel line to replace the original pixel line to form a correction image.
For example, referring to fig. 2 to 4, in the above steps S101 and S102, the point a is determined as a reference point, the calibration offset values of the points B to H relative to the point a in fig. 2 are 2, 5, 2, 7, 3, and 9, in the original binary dot matrix image shown in fig. 3, the pixel rows a-1, B-1, C-1, D-1, E-1, F-1, and G-1 to H-1 corresponding to the points a to H that need to be scanned tend to be aligned relative to the reference point, and the corrected image after correction based on the calibration offset values is shown in fig. 4, and the pixel rows a-2, B-2, C-2, D-2, E-2, F-2, and G-2 to H-2 corresponding to the points a to H that need to be scanned. Wherein A-2 is not modified relative to A-1; a-2 can also be moved by a preset distance according to requirements, and the relative positions of B-2, C-2, D-2, E-2, F-2, G-2 to H-2 and A-2 after movement need to be kept unchanged.
It can be seen from the above disclosure that, in the embodiment of the present application, a light spot having the maximum deviation in the laser scanning direction with respect to the calibration point is taken as a reference point of laser scanning, deviations of centers of light spots of other lasers in the laser scanning direction with respect to the reference point are calculated as calibration deviation values, then the scanning direction is taken as a correction direction, the calibration deviation values corresponding to other lasers are taken as respective correction distances, pixel rows scanned by other lasers are moved in an original binary dot matrix image, and pixels after the movement are formed into new pixel rows to replace the original pixel rows to form a correction image, so that in an exposure imaging process of a laser imaging device based on the correction image, the deviations of the centers of light spots of the lasers in the X-axis direction can be cancelled, and the accuracy of laser imaging is improved.
The applicant further noticed that in the related art, a scanned pixel row is allocated to each laser by a fixed value preset between adjacent lasers, distances of adjacent lasers in a laser array in a Y direction (perpendicular to a laser scanning direction) are often different, and if the pixel rows are allocated in an original manner, a developed image after development may have pixel overlap or an excessively large gap between adjacent pixel rows in the Y direction. There is a need for further improvement to the related art, and on the basis of the embodiments shown in fig. 1 to 4, before moving the pixel rows scanned by the lasers in the original binary dot matrix image, the pixel rows to be scanned by each laser need to be determined, which may specifically include: acquiring a step distance d of moving the center of a light spot of a laser in the laser array by one step in the Y-axis direction of an exposure surface; the Y-axis direction is vertical to the laser scanning direction; acquiring the distance L of the centers of light spots of adjacent lasers on the laser array in the Y-axis direction of the exposure surface; the number of pixel rows that each laser needs to scan is calculated from the ratio of L to d. After the reference points of the laser scanning are determined, pixel rows required to be scanned are sequentially allocated to each laser based on the number of the pixel rows required to be scanned by each laser, so that the last row scanned by the previous laser and the first row scanned by the next adjacent laser can be seamlessly attached or the attached gap is smaller than a preset tolerance value.
An embodiment of the present invention further provides an image processing system, which may include:
the first acquisition module is used for acquiring the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction as an initial offset value and determining the maximum initial offset value;
the first processing module is used for taking the spot center of the target laser corresponding to the maximum initial offset value as a reference point of laser scanning, and calculating the offset of the spot centers of other lasers except the target laser relative to the reference point in the laser scanning direction as a calibration offset value;
and the second processing module is used for acquiring the original binary dot matrix image, taking the scanning direction as the correction direction, taking the calibration offset values corresponding to other lasers as respective correction distances, moving the pixel lines scanned by other lasers in the original binary dot matrix image, and forming new pixel lines by using the pixels after moving to replace the original pixel lines to form a correction image.
Optionally, as a possible implementation manner, the image processing system in the embodiment of the present application may further include:
the second acquisition module is used for acquiring the step distance d of the spot center of the laser in the laser array moving by one step in the Y-axis direction of the exposure surface, and the Y-axis direction is vertical to the laser scanning direction;
the third acquisition module is used for acquiring the distance L of the centers of the light spots of the adjacent lasers on the laser array in the Y-axis direction of the exposure surface;
and the third processing module is used for calculating the number of pixel rows required to be scanned by each laser according to the ratio of the L to the d.
Optionally, as a possible implementation manner, the first obtaining module in the embodiment of the present application may include:
the first calculation unit calculates the adjacent offset value of the adjacent laser in the laser scanning direction on the laser array by adopting an image recognition algorithm, and indirectly calculates the offset of the light spot center of each laser relative to the calibration point in the laser scanning direction as an initial offset value on the basis of the adjacent offset value.
Optionally, as a possible implementation manner, the first obtaining module in the embodiment of the present application may include:
and the second calculating unit is used for directly calculating the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction by adopting an image recognition algorithm to serve as an initial offset value.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The image processing system in the embodiment of the present application is described above from the perspective of the modular functional entity, and referring to fig. 5, the laser imaging apparatus in the embodiment of the present application is described below from the perspective of hardware processing:
the laser imaging apparatus 1 may include a memory 11, a processor 12, and an input-output bus 13. The processor 11, when executing the computer program, implements the steps in the above-described embodiment of the image processing method for laser imaging shown in fig. 1, such as steps S101 to S103 shown in fig. 1. Alternatively, the processor, when executing the computer program, implements the functions of each module or unit in the above-described device embodiments.
In some embodiments of the present application, the processor is specifically configured to implement the following steps:
acquiring the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction as an initial offset value, and determining the maximum initial offset value;
taking the spot center of the target laser corresponding to the maximum initial offset value as a reference point of laser scanning, and calculating the offset of the spot centers of other lasers except the target laser relative to the reference point in the laser scanning direction as a calibration offset value;
and acquiring an original binary dot matrix image, taking the scanning direction as the correction direction, taking the calibration offset values corresponding to other lasers as respective correction distances, moving pixel rows scanned by other lasers in the original binary dot matrix image, and forming new pixel rows by using the moved pixels to replace the original pixel rows to form a correction image.
Optionally, as a possible implementation manner, the processor may be further configured to implement the following steps:
acquiring a step distance d of moving the center of a light spot of a laser in the laser array by one step in the Y-axis direction of an exposure surface, wherein the Y-axis direction is vertical to the laser scanning direction;
acquiring the distance L of the centers of light spots of adjacent lasers on the laser array in the Y-axis direction of the exposure surface;
the number of pixel rows that each laser needs to scan is calculated from the ratio of L to d.
Optionally, as a possible implementation manner, the processor may be further configured to implement the following steps:
and calculating the adjacent offset value of the adjacent laser in the laser scanning direction on the laser array by adopting an image recognition algorithm, and indirectly calculating the offset of the spot center of each laser relative to the calibration point in the laser scanning direction on the basis of the adjacent offset value to be used as an initial offset value.
Optionally, as a possible implementation manner, the processor may be further configured to implement the following steps:
and directly calculating the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction by adopting an image recognition algorithm to serve as an initial offset value.
The memory 11 includes at least one type of readable storage medium, and the readable storage medium includes a flash memory, a hard disk, a multimedia card, a card type memory (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 laser imaging device 1, for example a hard disk of the laser imaging device 1. The memory 11 may be an external storage device of the laser imaging apparatus 1 in other embodiments, such as a plug-in hard disk provided on the laser imaging 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 laser imaging apparatus 1. The memory 11 may be used not only to store application software installed in the laser imaging apparatus 1 and various types of data such as codes of a computer program, 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 laser imaging device 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 to establish a communication connection between the laser imaging device 1 and other electronic devices.
Fig. 5 shows only the laser imaging apparatus 1 having the components 11 to 14, and it will be understood by those skilled in the art that the structure shown in fig. 5 does not constitute a limitation of the laser imaging apparatus 1, and may include fewer or more components than those shown, for example, a laser array arranged in a line and a driving component for driving the laser array to move, etc., or some components may be combined, or different component arrangements may be included.
The present application also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, may implement the steps in the embodiment as shown in fig. 1.
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 system embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and in actual implementation, there may be other divisions, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not implemented. 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 modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The integrated module, if implemented in the form of a software functional module 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 application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in 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 application. 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.
While the present application has been described in detail with reference to the foregoing examples, all of the conventional features of the embodiments described herein may not be shown or described for ease of understanding. Those of ordinary skill in the art will understand 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 in the embodiments of the present application.
Claims (10)
1. An image processing method for laser imaging, comprising:
acquiring the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction as an initial offset value, and determining the maximum initial offset value;
taking the spot center of the target laser corresponding to the maximum initial offset value as a reference point of laser scanning, and calculating the offset of the spot centers of other lasers except the target laser relative to the reference point in the laser scanning direction as a calibration offset value;
and acquiring an original binary dot matrix image, taking the laser scanning direction as a correction direction, taking calibration deviation values corresponding to other lasers as respective correction distances, moving pixel rows scanned by the other lasers in the original binary dot matrix image, and forming new pixel rows by the pixels after moving to replace original pixel rows to form a correction image.
2. The method of claim 1, wherein before moving the other laser scanned pixel rows in the original binary dot matrix image, the method further comprises:
acquiring a step distance d of moving the center of a light spot of a laser in the laser array by one step in the Y-axis direction of an exposure surface; the Y-axis direction is perpendicular to the laser scanning direction;
acquiring the distance L of the centers of the light spots of the adjacent lasers on the laser array in the Y-axis direction of the exposure surface;
the number of pixel rows that each laser needs to scan is calculated from the ratio of L to d.
3. The method according to claim 1 or 2, wherein the obtaining of the offset of the center of the spot of each laser in the laser array relative to the index point in the laser scanning direction as the initial offset value comprises:
and calculating the adjacent offset value of the spot center of the adjacent laser in the laser scanning direction on the laser array by adopting an image recognition algorithm, and indirectly calculating the offset of the spot center of each laser relative to the calibration point in the laser scanning direction on the basis of the adjacent offset value to be used as an initial offset value.
4. The method according to claim 1 or 2, wherein the obtaining of the offset of the center of the spot of each laser in the laser array relative to the index point in the laser scanning direction as the initial offset value comprises:
and directly calculating the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction by adopting an image recognition algorithm to serve as an initial offset value.
5. An image processing system, comprising:
the first acquisition module is used for acquiring the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction as an initial offset value and determining the maximum initial offset value;
the first processing module is used for taking the spot center of the target laser corresponding to the maximum initial offset value as a reference point of laser scanning, and calculating the offset of the spot centers of other lasers except the target laser relative to the reference point in the laser scanning direction as a calibration offset value;
and the second processing module is used for acquiring an original binary dot matrix image, taking the laser scanning direction as a correction direction, taking the calibration deviation values corresponding to the other lasers as respective correction distances, moving the pixel lines scanned by the other lasers in the original binary dot matrix image, and forming new pixel lines by using the pixels after moving to replace the original pixel lines to form a correction image.
6. The system of claim 5, further comprising:
the second acquisition module is used for acquiring the step distance d of moving the spot center of the laser in the laser array by one step in the Y-axis direction of the exposure surface; the Y-axis direction is perpendicular to the laser scanning direction;
the third acquisition module is used for acquiring the distance L of the centers of the light spots of the adjacent lasers on the laser array in the Y-axis direction of the exposure surface;
and the third processing module is used for calculating the number of pixel rows required to be scanned by each laser according to the ratio of the L to the d.
7. The system of claim 5 or 6, wherein the first obtaining module comprises:
the first calculation unit calculates the adjacent offset value of the spot center of the adjacent laser in the laser scanning direction on the laser array by adopting an image recognition algorithm, and indirectly calculates the offset of the spot center of each laser relative to the calibration point in the laser scanning direction based on the adjacent offset value to be used as an initial offset value.
8. The system of claim 5 or 6, wherein the first obtaining module comprises:
and the second calculating unit is used for directly calculating the offset of the spot center of each laser on the laser array relative to the calibration point in the laser scanning direction by adopting an image recognition algorithm to serve as an initial offset value.
9. A laser imaging device comprising a processor for implementing the method of any one of claims 1 to 4 when executing a computer program stored in a memory.
10. 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 4.
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| CN114734717B (en) * | 2022-04-06 | 2023-07-14 | 深圳市先地图像科技有限公司 | TIFF image exposure method |
| CN115236952B (en) * | 2022-09-23 | 2022-11-29 | 深圳市先地图像科技有限公司 | Image data processing method and system for laser imaging and related equipment |
| CN115717859B (en) * | 2022-11-16 | 2023-09-29 | 南京博视医疗科技有限公司 | Laser calibration method and device for point scanning optical system |
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| JP2013240994A (en) * | 2012-04-26 | 2013-12-05 | Canon Inc | Image forming apparatus for correcting displacement between laser beams |
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