Plate copying machine based on integrated seamless scanning camera and use method of plate copying machine

Abstract

The invention relates to a plate making machine based on an integrated seamless scanning camera and a using method thereof.The plate making machine comprises a rack, an object platform, a lateral moving device, a lead screw device, an up-down scanning assembly and a background controller, the up-down scanning assembly is arranged on the upper side and the lower side of the object platform respectively, and covering scanning is achieved through lateral moving and lifting. And the background controller controls the components to cooperatively act according to the scanning mode, and acquires and processes the image. The method comprises the steps of system self-inspection, pre-analysis, scanning mode selection, light source and camera configuration, image acquisition, local enhancement, image splicing and output and the like. By introducing multiple processing strategies such as image registration, weighted fusion and error judgment, the precision and quality of scanned images are improved, and efficient scanning and reduction of complex or large materials are achieved. The scheme is compact in structure, high in imaging precision and suitable for various scenes such as printing platemaking and industrial image acquisition.

Description

Technical Field

[0001] This invention relates to the field of copying equipment technology, specifically to a copying machine based on an integrated seamless scanning camera, which is particularly suitable for scenarios involving high-precision recognition and editing of product patterns and shapes, and can be widely applied to the complex product copying needs of industries such as textiles, leather, packaging, electronics, and building materials. Background Technology

[0002] In existing technologies, traditional copying machines mainly rely on single contour recognition technology, which typically uses simple image acquisition devices that can only obtain the external contour information of the product. This type of copying machine has significant limitations: it cannot effectively recognize the patterns and shapes in the middle of the product, resulting in a lack of sufficient detailed information for subsequent graphic editing operations, making it difficult to meet the needs of complex product design and processing.

[0003] For example, in industries such as textiles, leather, and packaging, product surfaces often have rich patterns and intricate shapes and structures. Traditional copying machines cannot accurately capture this information, resulting in significant differences between the copied graphics and the original product. This reduces copying efficiency and quality, and increases the workload and cost of manual post-processing.

[0004] In addition, traditional equipment often uses a single top-mounted scanning and light source layout, which can easily lead to problems such as blurred images and glare interference when dealing with special materials such as transparent, semi-transparent, and highly reflective materials, resulting in a significant decrease in performance. Summary of the Invention

[0005] This invention aims to provide a copying machine based on an integrated seamless scanning camera, solving existing technical problems through the following technological innovations: introducing an integrated seamless scanning camera to overcome the limitations of traditional equipment that can only recognize outlines, achieving accurate recognition of the patterns and shapes in the middle of the product, and providing comprehensive data support for graphic editing; designing a multi-mode scanning and light source coordination scheme to adapt to special materials such as transparent, semi-transparent, and highly reflective materials, improving the copying effect on complex materials; and improving copying efficiency and quality, reducing manual intervention costs, and meeting diverse industry needs through automated adjustment and intelligent algorithms.

[0006] To solve the above-mentioned technical problems, the present invention provides a plaque copying machine based on an integrated seamless scanning camera, comprising: frame; The object platform is fixed to the frame; A lateral displacement device is movably connected at a position along the length of the frame; A lead screw assembly is installed in the lateral displacement device along the vertical movement direction; A scanning assembly, connected to the lateral movement device via the lead screw mechanism, is located above and below the object platform, and can move closer to or further away from the object platform via the lead screw mechanism. The scanning assembly includes an external light source device; and The background controller is communicatively connected to the lateral movement device, the lead screw device, and the scanning component, respectively; wherein The background controller controls the lateral movement device to move along the length of the object platform and controls the scanning component to move in the vertical direction to approach or move away from the object platform. At the same time, it provides a light source in the scanning direction to scan the face or face and back of the object to be scanned placed on the object platform and obtain a scanned image. The background controller also controls the illumination angle of the external light source device on the object platform.

[0007] Optionally, the lateral displacement device includes: A pair of side plates are slidably connected to rails on both sides of the frame in the width direction; A synchronous beam, with its two ends respectively connected to the inner bottom of a pair of side plates; and A pair of lateral lead screw assemblies are respectively disposed at the connection between the side plate and the frame; wherein The lateral lead screw assembly controls a pair of side plates to move synchronously via the synchronous beam.

[0008] Optionally, there are two sets of lead screw devices, which are respectively arranged on the inner surface of the side plate. Each set of lead screw devices includes an upper lead screw device and a lower lead screw device that are vertically coaxially distributed, have the same structure, and are arranged symmetrically. The upper lead screw device and the lower lead screw device each include a lead screw, a lead screw motor, a lead screw fixing block, and a lead screw slide rail arranged in a conventional manner. The lead screw motor controls the rotation of the lead screw and drives the lead screw fixing block to move back and forth along the length direction of the lead screw with the lead screw slide rail as a guide. Each lead screw fixing block is connected to a camera fixing plate for connecting the scanning component.

[0009] Optionally, the scanning component includes: An integrated scanning camera is connected at both ends to the corresponding camera mounting plates in a pair of side plates, and is used to scan the object to be scanned on the object platform and acquire scanned images; The external light source device is connected at both ends to the corresponding camera fixing plates in a pair of side plates via light source moving screw groups, and is used to provide light source to the object to be scanned on the object platform, and the light source illumination direction is directed towards the scanning area of ​​the integrated scanning camera.

[0010] Optionally, the integrated scanning camera includes an upper scanning camera and a lower scanning camera with identical structures and opposite mounting methods, and each of their ends is respectively connected between a pair of upper lead screw devices and a pair of lower lead screw devices. Both the upper and lower scanning cameras include: The camera profile is a long rectangular cabinet with an internal component housing cavity and a lens housing cavity, and has openings at the top and the bottom of the lens housing cavity; A camera backplate that covers and seals the opening at the top of the camera profile; The chip is horizontally disposed in the lens housing cavity and close to the camera back plate; A glass plate is used to cover and seal the opening at the bottom of the lens receiving cavity; A seamless lens, disposed perpendicularly to the length of the camera profile within the lens housing cavity and in contact with the glass plate, and located below the chip; and A pair of camera light source plates are disposed within the lens housing cavity along the length of the camera profile and are obliquely and symmetrically distributed on both sides of the seamless lens, with the light sources tilted downwards towards the glass plate; wherein The glass plate faces the object platform.

[0011] Optionally, the number of external light source devices is two sets, arranged in a triangular pattern between a pair of camera mounting plates and the integrated scanning camera. The two external light source devices are located on one side of the glass plate of the integrated scanning camera, and the illumination direction of the two external light source devices points to the scanning area of ​​the integrated scanning camera. Each external light source device includes: The casing is a long rectangular cabinet shape with an opening at the bottom; A cover plate that covers and seals the opening at the bottom of the housing; The light source fixing shaft is located inside the housing; A rotating shaft is formed at both ends of the light source fixing shaft and is rotatably disposed on the inner sides of both ends of the housing in the length direction; and A light source plate is fixed on the light source fixing shaft and generally faces the cover plate; wherein The housing has a pivot seat at the position where it connects to the pivot. The pivot seat contains a drive motor connected to the pivot. The drive motor controls the pivot to rotate and drives the light source fixed shaft to rotate, thereby controlling the direction of the light source board to adjust the illumination angle of the external light source device on the object platform.

[0012] To address the aforementioned technical problems, the present invention also provides a method for using a plaque copying machine based on an integrated seamless scanning camera, comprising the following steps: Step 1: Start the copying machine, trigger the system self-test program and move the scanning components to the initial position; Step 2: Perform material pre-analysis on the part to be scanned placed on the object platform, acquire preliminary images and generate pre-analysis results; Step 3: Select a matching scanning mode based on the pre-analysis results to identify fine regions in the image; Step 4: Configure the height parameters and light source parameters of the upper and lower scanning cameras according to the scanning mode; Step 5: Control the lateral shifting device to drive the upper and lower scanning cameras to move along the object platform and perform image acquisition; Step 6: When scanning to a fine area, automatically switch to local enhancement scanning mode; Step 7: After scanning is complete, perform image data processing, including error analysis, position correction, image fusion, and generate image files; Step 8: Save the image file and perform a system reset before shutdown.

[0013] Optionally, when configuring the light source parameters in step 4, the formula is used:

[0014] Calculate the light source compensation displacement, which is used to adjust the position of the illumination center so that the position of the light source is aligned with the target area, thereby improving the uniformity of image acquisition; in: This is the amount of synchronous displacement compensation for the light source; Speed-compensation coefficient; This represents the distance the side panel moves.

[0015] Optionally, during image processing in step 7, the following formula is used:

[0016] The system performs coordinate correction on the image frames; in: These are the pixel coordinates of the lower surface after the transformation; This is the scaling factor; These are the rotation and shear coefficients; This is the translation amount; And through the formula:

[0017] Calculate the mean error after mapping image points; in: This represents the average distance error. This represents the total number of matching homogeneous feature points; For the upper surface Coordinates of one feature point; To align the lower surface Coordinates of one feature point; To determine the matching accuracy before image stitching or fusion.

[0018] Optionally, when the mean image error meets a set threshold, the system performs weighted fusion on adjacent image frames, and the fusion weight is calculated from the scan position using the following formula: ; ; in: The weight is the same as the previous frame's weight. Weights for the next frame; x is the horizontal coordinate of the pixel in the overlapping region; These are the starting and ending horizontal coordinates of the overlapping region; The final fused image is obtained by the following formula:

[0019] in: The grayscale value of the merged pixel; These are the grayscale values ​​of the corresponding pixels in the previous and next frames, respectively. The fusion strategy enables seamless image transitions and brightness equalization.

[0020] The beneficial effects of the technical solution of this invention are: The copying machine of the present invention has an upper lead screw module whose lower end extends to the lower surface of the object platform and a lower lead screw module whose upper end extends to the upper surface of the object platform, enabling the upper and lower scanning cameras to break through the "platform boundary limitation" to achieve close-range scanning. It is compatible with thin film materials as thin as 0.1mm and plate materials as thick as 50mm, solving the problem of "blurry scanning of thin materials and inability to cover thick materials" caused by insufficient stroke in traditional equipment, and improving the scanning thickness adaptation range by more than 2 times.

[0021] The integrated scanning camera of the copying machine of the present invention extends horizontally in the left and right directions and is fixed at both ends. Compared with the traditional splicing camera, it avoids "scanning gaps" caused by splicing gaps. At the same time, the scanning baselines of the upper and lower cameras are collinear, which improves the spatial correspondence of the upper and lower surface images when scanning on both sides, and improves the efficiency of subsequent data comparison by 40%. It is especially suitable for the scenario of "upper and lower surface correlation detection" of composite materials.

[0022] When scanning on both sides, the copying machine of the present invention drives the upper and lower cameras and light source to move synchronously, eliminating the need to scan the upper and lower surfaces twice, thus improving the scanning efficiency by 100%. At the same time, the system automatically completes image stitching, noise reduction and alignment, avoiding the time-consuming and error-prone traditional manual processing. Attached Figure Description

[0023] Figure 1 This is a perspective view of the copying machine in an embodiment of the present invention; Figure 2 This is a cross-sectional view of the copying machine in an embodiment of the present invention; Figure 3 This is a stereoscopic view of the scanning camera in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the scanning camera in an embodiment of the present invention; Figure 5 This is a perspective view of the external light source device after the cover plate has been removed in an embodiment of the present invention; Figure 6 This is a cross-sectional view of the external light source device in an embodiment of the present invention; Figure 7 This is a flowchart illustrating the steps of using the copying machine in an embodiment of the present invention. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying 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 this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Please see Figure 1 and Figure 2 As shown, an embodiment of a plagiarism copying machine based on an integrated seamless scanning camera is illustrated, wherein: Rack 1; The object platform 3 is fixed to the frame 1 by the platform fixing bracket 2; The lateral displacement device 4 is movably connected to the frame 1 at a position along its length. The lead screw device 6 is installed in the lateral displacement device 4 along the vertical movement direction; The scanning component 7 is connected to the lateral movement device 4 via a lead screw device 6 and is located above and below the object platform 3. It can move closer to or further away from the object platform 3 via the lead screw device 6. The scanning component includes an external light source device 72; and The background controller (not shown) is communicatively connected to the lateral movement device 4, the lead screw device 6, and the scanning assembly 7, or electrically connected via control lines; wherein The background controller controls the lateral movement device 4 to move along the length of the object platform 3, and controls the scanning component 7 to move in the vertical direction to get closer to or away from the object platform 3. At the same time, it provides a light source in the scanning direction to scan the face or face and back of the object to be scanned placed on the object platform 3 and obtain a scanned image. The background controller also controls the illumination angle of the external light source device on the object platform.

[0030] In this embodiment, the lateral displacement device 4 includes: A pair of side plates 41 are slidably connected to the rails 11 on both sides of the frame 1 in the width direction; Synchronous beam 42, with its two ends respectively connected to the inner bottom of a pair of side plates 41; and A pair of lateral lead screw assemblies 43 are respectively disposed at the connection between the side plate 41 and the track 11 of the frame 1; wherein The lateral lead screw assembly 43 controls a pair of side plates 41 to move synchronously through the synchronous beam 42.

[0031] In this embodiment, there are two sets of lead screw devices 6, which are respectively arranged on the inner surface of the side plate 41. Each set of lead screw devices 6 includes an upper lead screw device and a lower lead screw device (e.g., vertically coaxially distributed, identical in structure, and relatively symmetrically arranged) that are vertically coaxially distributed. Figure 2 As shown, the lead screw device 6 includes two lead screw structures that are identical and symmetrically installed (upper and lower). Both the upper and lower lead screw devices include a lead screw 61, a lead screw motor 62, a lead screw fixing block 63, and a lead screw slide rail 64 arranged in a conventional manner. The lead screw motor 62 controls the rotation of the lead screw 61 and drives the lead screw fixing block 63 to move back and forth along the length direction of the lead screw 61 with the lead screw slide rail 64 as a guide. Each lead screw fixing block 63 is connected to a camera fixing plate 5 for connecting the scanning assembly 7.

[0032] In this embodiment, the scanning component 7 includes: An integrated scanning camera 71 is connected at both ends to corresponding camera mounting plates 5 in a pair of side plates 41, and is used to scan the object to be scanned on the object platform 3 and acquire scanned images.

[0033] The external light source device 72 is connected at both ends to the corresponding camera fixing plate 5 in a pair of side plates 41 via a light source moving lead screw assembly (a common lead screw structure with the same structure as the lead screw device 6, which is not shown in the figure due to its small size, but does not affect the understanding of those skilled in the art). It is used to provide light source to the object to be scanned on the object platform 3, and the light source illumination direction is directed towards the scanning area of ​​the integrated scanning camera 71.

[0034] In this embodiment, as Figure 3 and Figure 4As shown, the integrated scanning camera 71 includes an upper scanning camera and a lower scanning camera with identical structures and opposite mounting methods, and each of their ends is connected between a pair of upper lead screw devices and a pair of lower lead screw devices, respectively. Both the upper and lower scanning cameras include: The camera profile 711 is a long rectangular cabinet with an internal component receiving cavity A and a lens receiving cavity B, and an opening C is formed at the top of the camera profile 711 and the bottom of the lens receiving cavity B. Camera backplate 712 covers and seals the opening C at the top of camera profile 711; Chip 713 is horizontally disposed in the lens receiving cavity B and close to the camera back plate 712; Glass plate 714 covers and seals the opening C at the bottom of the lens receiving cavity B; A seamless lens 715 is disposed perpendicularly to the length of the camera profile 711 within the lens housing B and contacts the glass plate 714, located below the chip 713; and A pair of camera light source plates 716 are disposed in the lens receiving cavity B along the length of the camera profile 711 and are obliquely and symmetrically distributed on both sides of the seamless lens 715, with the light sources tilted downwards toward the glass plate 714; wherein The glass plate 714 faces the object platform.

[0035] In this embodiment, as Figure 5 and Figure 6 As shown, there are two sets of external light source devices 72, which are arranged in a triangular pattern with the integrated scanning camera 71 between a pair of camera mounting plates 5 (e.g., Figure 2 As shown), the two external light source devices 72 are located on one side of the glass plate 714 of the integrated scanning camera 71, and the light source illumination direction of the two external light source devices 72 is the same, pointing towards the scanning area of ​​the integrated scanning camera 71. Each external light source device 72 includes: The housing 721 is a long rectangular cabinet with an opening at the bottom D; Cover plate 722 covers and seals the opening D at the bottom of housing 721; The light source fixing shaft 723 is located in the housing 721; Rotating shafts 724 are formed at both ends of the light source fixing shaft 723, and are rotatably disposed on the inner sides of both ends of the housing 721 along its length; and The light source plate 725 is fixed on the light source fixing shaft 723 and generally faces the cover plate 722; wherein The housing 721 has a pivot seat 726 at the position where the pivot 724 is connected. The pivot seat 726 has a drive motor (hidden in the pivot seat 726 and not shown) connected to the pivot 724. The drive motor controls the pivot 724 to rotate and drives the light source fixing shaft 723 to rotate, thereby controlling the direction of the light source plate 725 to adjust the illumination angle of the external light source device 72 on the object platform 3.

[0036] To solve the above-mentioned technical problems, such as Figure 7 As shown, the present invention also provides a method for using a plagiarism copying machine based on an integrated seamless scanning camera, which includes the following steps: Step 1: Start the copying machine, trigger the system self-test program and move the scanning components to the initial position; Step 2: Perform material pre-analysis on the part to be scanned placed on the object platform, acquire preliminary images and generate pre-analysis results; Step 3: Select a matching scanning mode based on the pre-analysis results to identify fine regions in the image; Step 4: Configure the height parameters and light source parameters of the upper and lower scanning cameras according to the scanning mode; Step 5: Control the lateral movement device to drive the upper and lower scanning cameras to move along the object platform and perform image acquisition; Step 6: When scanning to a fine area, automatically switch to local enhancement scanning mode; Step 7: After scanning is complete, perform image data processing, including error analysis, position correction, image fusion, and generate image files; Step 8: Save the image file and perform a system reset before shutdown.

[0037] In this embodiment, when configuring the light source parameters in step 4, the formula is used:

[0038] Calculate the light source compensation displacement, which is used to adjust the position of the illumination center so that the position of the light source is aligned with the target area, thereby improving the uniformity of image acquisition; in: This is the amount of synchronous displacement compensation for the light source; Speed-compensation coefficient; This represents the distance the side panel moves.

[0039] Optionally, during image processing in step 7, the following formula is used:

[0040] The system performs coordinate correction on the image frames; in: These are the pixel coordinates of the lower surface after the transformation; This is the scaling factor; These are the rotation and shear coefficients; This is the translation amount; And through the formula:

[0041] Calculate the mean error after mapping image points; in: This represents the average distance error. This represents the total number of matching homogeneous feature points; For the upper surface Coordinates of one feature point; To align the lower surface Coordinates of one feature point; To determine the matching accuracy before image stitching or fusion.

[0042] Optionally, when the mean image error meets a set threshold, the system performs weighted fusion on adjacent image frames, and the fusion weight is calculated from the scan position using the following formula: ; ; in: The weight is the same as the previous frame's weight. Weights for the next frame; x is the horizontal coordinate of the pixel in the overlapping region; These are the starting and ending horizontal coordinates of the overlapping region; The final fused image is obtained by the following formula:

[0043] in: The grayscale value of the merged pixel; These are the grayscale values ​​of the corresponding pixels in the previous and next frames, respectively. The fusion strategy enables seamless image transitions and brightness equalization.

[0044] The following description will further illustrate the characteristics and functions of the present invention.

[0045] This embodiment discloses a plagiarism copying machine based on an integrated seamless scanning camera. Its structure includes: frame and synchronous drive structure, camera adjustment mechanism, integrated scanning camera, light source adjustment system, control system and sensors.

[0046] The device includes a frame on which two side plate linear motor modules are mounted. These linear motor modules are existing technology and will not be described in detail here. Side plates are mounted on the side plate linear motor modules and are slidably connected to the frame in the front-to-back direction. The two side plates are fixed together by a synchronous beam extending in the left-to-right direction. The left and right ends of the synchronous beam are respectively fixed to the lower inner wall of one side plate. The synchronous beam includes two horizontal beams extending in the left-to-right direction and several reinforcing beams fixed between the two horizontal beams. An object platform, made of transparent material, is fixed to the frame between the two side plates and extends in the front-to-back direction. The front and rear ends of the object platform are fixed to the frame by a platform fixing frame extending in the vertical direction.

[0047] A lead screw module extending vertically is mounted on the inner side of the side plate. The lead screw module includes a lead screw, a lead screw motor, a lead screw fixing block, and a lead screw slide rail. The output end of the lead screw motor is fixedly connected to the lead screw. The lead screw extends vertically, and two lead screw slide rails are provided, located on the front and rear sides of the lead screw respectively. The lead screw slide rails also extend vertically. The lead screw fixing block is threaded onto the lead screw. A camera mounting plate is mounted on the lead screw module. The outer side of the camera mounting plate is fixedly connected to the lead screw fixing block, and the front and rear ends of the camera mounting plate are slidably connected to the lead screw slide rails respectively. Above, the camera mounting plate is slidably connected to the side plate in the vertical direction via a lead screw module. The lead screw module includes an upper lead screw module and a lower lead screw module. The upper lead screw module is installed on the upper half of the side plate and extends downward, with the lowest end of the lead screw of the upper lead screw module located below the upper surface of the object platform. The lower lead screw module is installed on the lower half of the side plate and extends upward. The lower lead screw module mode 5 (dual-sided synchronous scanning) is suitable for materials that need to be detected on both the upper and lower surfaces simultaneously (both surfaces have patterns, and the highest end of any lead screw is located above the lower surface of the object platform).

[0048] An integrated scanning camera is fixedly connected to the camera mounting plate. The integrated scanning camera extends horizontally in the left and right direction, and its left and right ends are respectively fixedly connected to a camera mounting plate. There are two integrated scanning cameras, which are defined as the upper scanning camera and the lower scanning camera from top to bottom in the vertical direction. The two integrated scanning cameras are arranged opposite to each other, with their lens scanning reference lines collinear, their lenses facing opposite directions and facing each other. The upper scanning camera is located above the object platform and its lens is facing downwards, while the lower scanning camera is located below the object platform and its lens is facing upwards.

[0049] A linear motor module for the light source is mounted on the camera mounting plate. The linear motor module extends along the front-to-back direction, with two modules mounted on each camera mounting plate, arranged opposite each other. The module in front extends rearward, and the module in the back extends forward, forming a symmetrical sliding guide structure. An external light source device is mounted on each linear motor module, extending left-to-right, with its left and right ends connected to the corresponding linear motor modules on the sides. The linear motor modules enable the light source to move along the front-to-back direction on the camera mounting plate. The light source linear motor module is located in the inner area of ​​the inner end face of the two integrated scanning cameras, and the external light source device is located in the inner space of the integrated scanning camera. When the external light source device slides in the front-back direction, its movement trajectory does not intersect with the spatial position of the integrated scanning camera, and the two do not interfere with each other. The two external light source devices on the upper side are symmetrically inclined, and the light emitted by both extends downward at an angle, and the light eventually points to the object scanning area together. The two external light source devices on the lower side are symmetrically inclined, and the light emitted by both extends upward at an angle, and the light eventually points to the object scanning area together.

[0050] The frame is equipped with a control system. The side plate linear motor module, lead screw module, light source linear motor module, integrated scanning camera, and external light source device are all electrically connected to the control system. The frame is equipped with front sensors for detecting key properties of the material. The front sensors include an infrared thickness sensor, a transmittance detector, and a reflectance sensor.

[0051] The external light source device includes a housing, and a cover plate is installed on the upper surface of the housing. The cover plate is made of transparent material. A rotating shaft is rotatably connected inside the housing. The rotating shaft is driven to rotate by a drive motor fixed on the housing. A light source fixing shaft is fixed to the rotating shaft, and a light source is fixed on the light source fixing shaft. The rotating shaft can be driven to rotate as needed, thereby changing the tilt angle of the object on which the light source is placed.

[0052] The integrated scanning camera includes a camera profile with both ends fixed to side plates. The camera profile contains a component housing cavity and a lens housing cavity. The component housing cavity holds the components required for camera operation. A camera backplate is mounted on the upper surface of the camera profile to cover the components. A seamless lens extending horizontally and vertically is mounted within the lens housing cavity. A chip board fixed to the camera profile is also mounted within the lens housing cavity. A photosensitive element is mounted on the chip board, which is positioned above the seamless lens. Reflected light from text or images is focused by the seamless lens onto the effective photosensitive area of ​​the photosensitive element, thus completing the scanning function. The photosensitive elements are linearly arranged horizontally. Adjacent sensors are precisely calibrated to achieve "gap-free splicing." The seamless lens is composed of multiple lens plates. The edges of the lens plates are designed with an inclined surface, and their inclination angle is strictly parallel to the common tangent of two adjacent cylindrical lenses, ensuring that the lenses remain continuous and evenly spaced after splicing. Vacuum adsorption positioning technology is used when splicing adjacent lens plates, combined with special optical adhesive, to achieve seamless bonding. By using a pre-designed edge tilt angle, the system automatically compensates for the tiny gaps caused by cutting at the splicing point, ultimately forming a continuous and optically uniform seamless lens; a glass plate fixed to the camera profile is placed below the seamless lens to prevent dust from entering.

[0053] A method for using a plate-copying machine based on an integrated seamless scanning camera includes the following steps: A: Connect the power supply, start the control system, trigger the equipment self-test program to initialize the side panel linear motor module, upper / lower lead screw module, and light source linear motor module to perform self-test, confirm that each moving part is running smoothly, and that the integrated scanning camera and external light source device are functioning normally. Confirm the initial state of the equipment through the control system display screen, that the side panel is in the reference position, the upper / lower camera is at the initial height, and the external light source device is in the middle standby state. The "pulse response detection method" is used to send tiny drive pulses (such as 0.1mm displacement commands) to each motor module, and the position signal feedback is used to determine whether the motor is stuck. For the camera and light source, standard test signals are sent to detect whether the image acquisition is normal and whether the light intensity of the light source meets the standard. When the self-test is abnormal, the specific faulty component is output through the "fault location algorithm".

[0054] Formulas involved: Motor displacement deviation calculation:

[0055] in Motor displacement deviation (mm) when A value greater than 0.02 mm is considered stuck. The command displacement (mm) corresponding to the drive pulse, default. =0.1mm; The actual displacement (mm) fed back by the motor encoder; B: Place the material to be scanned flat in the center of the transparent platform, aligning it with the positioning scale lines on the platform edge to avoid misalignment; click "Material Pre-analysis" on the control system interface to start a low-speed (0.5m / min), low-resolution (300dpi) full-surface pre-scan to acquire initial image data of the material, including the surface to be scanned (upper surface / lower surface / double surface), material thickness, light transmittance, surface reflectivity, and texture features. Basic data is collected using the device's front-mounted sensors (infrared thickness sensor, light transmittance detector, reflectivity sensor) to determine material properties. The infrared sensor emits infrared light that penetrates the material, and the thickness is calculated based on the attenuation of the received light intensity. The light source module emits standard white light, and the transmittance detector receives the transmitted light intensity to calculate the transmittance (0-100%), classifying it into three categories: non-transparent (<30%), semi-transparent (30%-70%), and highly transparent (>70%). A directional light source illuminates the material surface at a 45° angle, and the reflectance sensor receives the reflected light intensity to calculate the reflectance. Through image pre-acquisition (low-resolution rapid shooting), it identifies whether the material surface has texture / patterns, determining whether single-surface or dual-surface scanning is required. A "grayscale variance distribution algorithm" is used to determine whether the surface is uniform. If the grayscale variance fluctuation across the entire area is >20%, it is marked as "non-uniform material," triggering subsequent dynamic adjustments. Formulas involved: To determine if the light source's luminous intensity meets the standard, a standard test signal is sent, and the deviation between the actual luminous intensity of the light source and the rated value is detected. Light source intensity deviation rate:

[0056] in, Light source intensity deviation rate (%) A score of <10 is considered to meet the standard; This represents the actual luminous intensity of the light source; The rated luminous intensity of the light source.

[0057] Based on the light intensity attenuation law of infrared light penetrating materials, the material thickness is calculated: Infrared light intensity attenuation model:

[0058] Where d is the material thickness (mm) and k is the infrared absorption coefficient of the material. This is obtained through pre-calibration (e.g., for fabric, k=0.2). For plastics, k=0.15 ; The intensity of light emitted by the infrared sensor (μW / cm²); is the transmitted light intensity received by the infrared sensor (μW / cm²); Calculation of material light transmittance. By the light intensity ratio of standard white light penetrating the material, the light transmittance type is classified. Definition formula of light transmittance:

[0059] where T is the material light transmittance (%), classified as T < 30% (opaque), 30% < T < 70% (translucent), T > 70% (highly transparent); is the transmitted white light intensity received by the light transmittance detector (μW / cm²), is the standard white light intensity emitted by the light source module (μW / cm²); Calculation of material reflectance. By the reflected light intensity after irradiation by a directional light source (45° angle), the reflectance is calculated. Definition formula of reflectance

[0060] where R is the surface reflectance of the material (%); is the incident light intensity of the directional light source (μW / cm²); is the reflected light intensity received by the reflectance sensor; is the angle between the incident light and the material surface, here = 45°; Judgment of surface uniformity. By the gray variance fluctuation of the pre-scanned image, mark "materials with uneven surfaces". Gray variance of the entire region:

[0061] Gray variance fluctuation coefficient:

[0062] where CV is the gray variance fluctuation coefficient (%), and when CV > 20%, it is marked as "materials with uneven surfaces"; is the gray value (0 - 255) of the pixel (i, j) in the pre-scanned image; is the average gray value of the entire image; is the pixel resolution of the pre-scanned image (e.g., M = 1000, N = 1000 at 300 dpi); is the gray variance of the image sub-region; is the average gray variance of all sub-regions of the entire image.

[0063] C: The control system automatically recommends a scanning mode (Mode 1 - 5) based on the material property analysis results in step B, and displays the recommended reasons on the interface: Mode 1 (Upper camera + upper light source collaborative scanning): Suitable for non-transparent materials that only need to be detected on the upper surface (transmittance <30%, and only the upper surface has a pattern); Mode 2 (lower camera + lower light source collaborative scanning): suitable for non-transparent materials that only need to be detected on the lower surface (transmittance <30% and a pattern on the lower surface). Mode 3 (Upper camera + lower light source collaborative scanning): Suitable for translucent materials whose upper surface needs to be inspected (30% ≤ transmittance ≤ 70%, and upper surface scanning). Mode 4 (lower camera + upper light source collaborative scanning): suitable for non-transparent thick materials that need to be inspected on the lower surface (transmittance <30%, material thickness >20mm and lower surface scanning). Mode 5 (dual-sided synchronous scanning): suitable for materials that need to be detected on both the upper and lower surfaces simultaneously (both surfaces have patterns and arbitrary light transmittance). D: The system calls the pre-scanned image from step B and automatically identifies the areas that need to be enhanced (such as areas with dense textures and edge contours). Preprocessing: Noise is eliminated using a 3×3 Gaussian filter, and image edges are extracted using the Canny operator; Feature judgment: Texture density is calculated using the "gray-level co-occurrence matrix" (areas >30% are marked as dense areas), and reflective areas are identified using the "brightness deviation algorithm" (gray-level deviation >20%); Region processing: A "connected region merging algorithm" is performed on candidate regions with a spacing <10mm to avoid fragmentation; Image coordinates are converted to side plate displacement coordinates using "pixel-displacement mapping" (e.g., 1mm corresponds to 20 pixels), and the region range is output; After recognition is completed, the fine area range (e.g., X: 120-190mm, Y: 50-480mm) is marked with a red box on the display screen. Users can manually fine-tune the area size; the system automatically matches enhancement parameters for the fine area. The algorithm involved calculates texture density (gray-level co-occurrence matrix), and determines the texture density based on the energy value of the gray-level co-occurrence matrix. Gray-level co-occurrence matrix energy value (texture density index):

[0064] Where E is the texture density index, and when E>0.03 (corresponding to texture density>30%), it is marked as a "texture-dense area"; (P(i,j) is the probability of gray-level pair (i,j) in the gray-level co-occurrence matrix after normalization) ), usually taking a co-occurrence matrix with a distance of 1 and an angle of 0°.

[0065] Brightness deviation area identification identifies reflective / underexposed areas by measuring the deviation between pixel grayscale values ​​and the average grayscale of the area. Brightness deviation rate:

[0066] in, The brightness deviation rate (%) Areas exceeding 20% ​​are marked as "brightness deviation areas" (reflective / underexposed areas); This represents the average gray value of the sub-region. Pixel-to-displacement mapping (image coordinates to side plate displacement) converts the image pixel coordinates of fine regions into side plate displacement coordinates: Pixel-displacement mapping relationship:

[0067] Where s is the side plate displacement coordinate (mm); p is the image pixel coordinate (pixels). This refers to the resolution factor (pixels / mm), such as at 300 dpi. = (Pixels / mm is calculated by default as 1mm corresponds to 20 pixels for simplification). E: After the user confirms the mode in step C, the system automatically configures the initial parameters, including the camera height: In mode 1 / 3, the upper camera is driven to move vertically through the upper lead screw module, so that the distance between the lens and the upper surface of the material reaches the preset value; In mode 2 / 4, the lower camera is driven to move vertically by the lower lead screw module, so that the distance between the lens and the lower surface of the material reaches the preset value; Mode 5: Synchronously adjust the upper and lower lead screw modules to ensure that the upper and lower camera scanning baselines are collinear and maintain an appropriate distance from the upper and lower surfaces of the material, respectively. F: Configure the initial angle parameters of the light source. Modes 1 and 4 only enable the two external light source devices on the upper side, modes 2 and 3 only enable the two external light source devices on the lower side, and mode 5 enables both upper and lower light sources simultaneously. The external light source device is driven by a linear motor module to move in the front-back direction and adjust to a preset position. Depending on the material, the light sources on both sides move to different positions. At the same time, the tilt angle of the light source fixing axis of the external light source device can be adjusted as needed, thereby changing the light source angle. If the material surface is uniform, or if the normal mode is manually selected, then the fixed light source mode is enabled. The contrast of the scanned image is calculated using the "grayscale variance method." The grayscale values ​​of the pre-scanned image are statistically analyzed, and the variance σ is calculated. σ < 50 indicates low contrast, 50 ≤ σ ≤ 150 indicates acceptable contrast, and σ > 150 indicates high contrast. The light source parameters are optimized based on the "gradient descent method." In the initial state, the light source is located in the middle position (front-to-back direction) at an angle of 45°. A pre-scan image is acquired, and the contrast σ1 is calculated. If σ1 < 50 (low contrast), adjust the position of the light source and move it 5mm closer to the scanning area. Acquire an image and calculate σ2. If σ2 > σ1, continue moving until σ reaches the acceptable range. Adjust the tilt angle. If σ is still < 50 after position adjustment, decrease the angle in 5° increments (30° → 25° → …) to increase the intensity of direct light until σ ≥ 50. If σ1 > 150 (high contrast / overexposure), adjust the position of the light source, move it 5mm away from the scanning area, acquire an image and calculate σ2. If σ2 < σ1, continue moving until σ reaches the acceptable range. Adjust the tilt angle. If σ is still > 150 after position adjustment, increase the angle in 5° increments (45° → 50° → …) to reduce the intensity of direct light until σ ≤ 150. When the contrast ratio σ is stable within the range of 50-150, and the change in σ is less than 5% after three consecutive adjustments, the adjustment is terminated.

[0068] If the material is of the "non-uniform surface type", or if "dynamic light source mode" is enabled, the system will activate the dynamic light source adjustment mode. The control system loads a "displacement-illumination offset mapping table" (pre-stored compensation parameters for different scanning speeds) and enables the "real-time image analysis module." The contrast detection frequency for each frame is set (consistent with the camera frame rate). After each frame is acquired, the "real-time image analysis module" calculates the contrast σ. If σ > 150 (overexposure): The control system immediately sends a command to drive the light source to move 3-5mm away from the material, while increasing the tilt angle by 5°-10° to reduce the direct light. If σ < 50 (underexposure): Move the drive light source 2-3mm closer to the material and reduce the tilt angle by 3°-5° to enhance the illumination; After adjustment, delay by 1 frame (≈33ms) and detect again until σ stabilizes within the range of 50-150. Displacement offset compensation: Based on the displacement signal of the linear motor module of the side plate (one pulse is sent for every 0.1mm movement), the position of the light source is synchronously compensated. When the scanning speed is 3m / min, the light source moves forward 0.2mm synchronously for every 10mm the camera moves forward; the light source angle increases by 2° for every 1m / min increase in speed to counteract airflow disturbance. Smooth transition during start-stop phases: During acceleration (0-1m / min), the light source angle gradually increases by 5° from the initial value while moving backward at a speed of 0.1mm / s; during deceleration (8-0m / min), the light source angle gradually decreases by 5° back to the initial value while moving forward at a speed of 0.1mm / s.

[0069] The formula involved is: Image contrast calculation, which determines whether the contrast is acceptable by using the grayscale variance of the pre-scanned image; Image contrast:

[0070] in, Image contrast (grayscale standard deviation). <50 (low contrast), 50< <150 (passed), >150 (overexposed); P is the total number of pixels in a single frame; Let be the grayscale value of the k-th pixel; The average grayscale value of a single frame image; Dynamic light source displacement compensation: Based on the scanning speed and camera displacement, the light source position is compensated synchronously to counteract field of view shift. Light source synchronous displacement compensation amount:

[0071] The amount of synchronous displacement compensation for the light source (mm); For speed-compensation coefficient, =0.02+0.02×(v-3) (v is the scanning speed, unit: m / min), when (v=3m / min, =0.02 (meaning the camera moves 10mm and the light source moves 0.2mm). The distance (mm) the camera (side panel) moves.

[0072] Light source angular velocity compensation amount:

[0073] in, is the light source angle compensation amount (°). For every 1 m / min increase in scanning speed, the angle increases by 2°; v is the scanning speed (m / min), v > 1 m / min.

[0074] During the start-up and stop phases, the light source transitions smoothly; during the acceleration / deceleration phases, the light source angle and position transition linearly. Light source position transition during acceleration phase

[0075] Light source position transition during acceleration phase

[0076] in, Let t be the angle of the light source at time t (°). The initial angle (default 45°); The scanning speed at time t (m / min) represents the acceleration phase. From 0 to 1 m / min; The position of the light source at time t (mm) is given. t represents the position in the light source; t is the acceleration time (s). The formula for the deceleration phase is symmetrical, and the angle is from... Down to The location is from Reset to .

[0077] G: Start the automatic scanning program. The side panel linear motor module drives the side panel to move at a constant speed in the front and back direction, which drives the integrated scanning camera and external light source device to move synchronously to complete image acquisition. The coordination between the dual cameras and the side panel drive is achieved based on the "pulse synchronization signal". For every 0.1mm movement of the side panel linear motor module, a synchronization pulse is sent to the control system. After receiving the pulse, the control system simultaneously triggers the upper and lower cameras to acquire one frame of image (the frame rate is matched with the moving speed: 30fps at a speed of 1m / min), ensuring that the upper and lower cameras acquire images in the same spatial position. The SIFT (Scale Invariant Feature Transform) algorithm is used to extract feature points (such as edges and texture inflection points) from the upper and lower surface images. The upper and lower images are then grayscaled and Gaussian blurred to eliminate noise, a scale space is constructed, extreme points (feature points) are detected, and the position, scale, and orientation of the feature points are calculated to generate feature point descriptors (128-dimensional vectors). The nearest neighbor matching method is used to match the same source feature points (such as the same inflection point of the material edge) in the upper and lower images. Based on the matched feature points, calculate the spatial transformation matrix (affine transformation) of the upper and lower images. Select at least 4 pairs of matched feature points, construct a system of equations, and solve for the transformation parameters (translation Δx, Δy, rotation angle θ). According to the transformation parameters, translate and rotate the lower surface image to make the feature points of the upper and lower surfaces completely coincide. Verify the alignment accuracy by calculating the "feature point distance error" of the upper and lower images after alignment. An average error of <0.1mm is acceptable; otherwise, re-extract and match the feature points. The formula involved is SIFT feature point matching, which uses the Euclidean distance of feature point descriptors to match common feature points on the upper and lower surface images: Feature point descriptor Euclidean distance

[0078] Where D is the Euclidean distance between the two feature point descriptors, D < 0.6 × When determined to be of the same origin ( (the distance between the next nearest neighbors descriptors). , These are the m-th dimension descriptors (128-dimensional vectors) for two feature points. Affine transformation (spatial alignment) of top and bottom images: Based on 4 pairs of common feature points, the affine transformation matrix is ​​calculated to achieve top and bottom image alignment. Affine transformation matrix For the lower surface image pixel (x,y), the transformed coordinates (x',y') satisfy:

[0079] The transformation parameters are solved using the coordinates of the originating points: 4 pairs of originating points are known on the upper and lower surfaces. …, construct a system of equations:

[0080] Where (x', y') are the pixel coordinates of the lower surface after transformation, (x, y) are the pixel coordinates of the lower surface before transformation, a and d are scaling factors, and b and c are rotation and shearing factors. , The translation amount is in mm, and the corresponding pixel coordinates need to be converted through "pixel-displacement mapping".

[0081] To verify its accuracy (feature point distance error), calculate the distance error between source feature points in the upper and lower images after alignment, and verify the alignment accuracy: Average distance error of feature points:

[0082] in, The average distance error is (mm). If the value is less than 0.1, it is considered qualified. Q is the total number of matching homologous feature points (Q≥4). Let q be the coordinates (mm) of the qth feature point on the upper surface. The coordinates (mm) of the qth feature point on the lower surface after alignment; H: When the "Dynamic Light Source Mode" is enabled and the side plate displacement enters the "Fine Area", the system automatically triggers the "Local Enhancement Mode". The light source moves 5mm towards the material, the angle decreases by 10°, and the camera exposure time increases by 20%. After leaving the fine area, the light source and exposure parameters are automatically reset to the normal state. During dual-side scanning, the upper and lower light sources perform dynamic adjustment independently (the upper light source is based on the upper surface image, and the lower light source is based on the lower surface image). The adjustment parameters do not interfere with each other, ensuring that the imaging quality of the upper and lower surfaces is optimized synchronously.

[0083] I: After scanning, the system automatically performs image stitching, noise reduction, enhancement and other processing. Single-sided scanning generates a single-surface image file, and double-sided scanning generates a three-dimensional image file with the upper and lower surfaces aligned. Users can perform secondary editing (cropping, annotation, etc.) on the processed images through the control system. After confirming that there are no errors, the images are saved to local storage or uploaded to the cloud system. The system employs an "adaptive bilateral filtering algorithm" that balances noise reduction and detail preservation. The image is divided into blocks, and the gray-level variance of each block is calculated. For blocks with large variance (regions with rich texture), the filter kernel radius is reduced to preserve details; for blocks with small variance (smooth regions), the filter kernel radius is increased to enhance the noise reduction effect. After filtering, "histogram equalization" is used to enhance image contrast and highlight texture details.

[0084] For wide-format materials, a "feature point matching + fade-in / fade-out fusion" method is used to achieve stitching. The overlapping area of ​​adjacent frame images is extracted (overlap rate of 20% to ensure feature point matching). The SIFT algorithm is used to match the feature points of adjacent frames, calculate the stitching transformation matrix, transform the subsequent frame image to align with the overlapping area of ​​the previous frame, and perform fusion processing. In the overlapping area, the weight of the previous frame image linearly decreases from 1 to 0, and the weight of the subsequent frame image linearly increases from 0 to 1, eliminating stitching artifacts (brightness difference < 5%). The formula involves adaptive bilateral filtering (noise reduction), which dynamically adjusts the filter kernel radius based on the gray-level variance of image sub-regions. Adaptive adjustment of filter kernel radius:

[0085] bilateral filter output grayscale value:

[0086] Where r is the radius of the filter kernel (in pixels). The gray-level variance of the sub-region; is the gray value of pixel (i,j) after filtering; W is the normalization weight factor; The standard deviation of the spatial domain (default 3); Standard deviation of the grayscale range (default 20); Wide-frame image stitching (fade-in / fade-out blending) eliminates stitching artifacts in overlapping areas of adjacent frames using linear weighted fusion: Overlapping region fusion weights: For pixels within the overlapping region, the weights from the previous frame are used. Weights of the next frame satisfy: ; ; Pixel grayscale values ​​after fusion:

[0087] Where x is the horizontal coordinate of the pixel in the overlapping region; , These are the starting and ending horizontal coordinates of the overlapping region; These are the grayscale values ​​of the corresponding pixels in the previous and next frames, respectively. To ensure the brightness difference in overlapping areas, the grayscale values ​​of the merged pixels are determined. ; H: Turn off the power to the device, perform a pre-shutdown self-test, and reset all moving parts to their initial positions.

[0088] In summary, the two side plates on the frame of the copying machine of the present invention are fixedly connected by a synchronous beam. With the help of the side plate linear motor module, the two side plates can be driven to move synchronously and uniformly in the front-back direction. The core function is to drive the camera fixing plate, the integrated scanning camera and the external light source device on the two side plates to move synchronously, so as to ensure that the relative position of the camera and the light source remains unchanged during the scanning process and avoid the misalignment of the scanned image caused by the displacement deviation of one side.

[0089] The copying machine of the present invention has an upper lead screw module whose lower end extends to the lower surface of the object platform and a lower lead screw module whose upper end extends to the upper surface of the object platform, enabling the upper and lower scanning cameras to break through the "platform boundary limitation" to achieve close-range scanning. It is compatible with thin film materials as thin as 0.1mm and plate materials as thick as 50mm, solving the problem of "blurry scanning of thin materials and inability to cover thick materials" caused by insufficient stroke in traditional equipment, and improving the scanning thickness adaptation range by more than 2 times.

[0090] The copying machine of this invention is designed for materials with uneven surfaces (such as locally reflective metal plates and densely textured fabrics). Through "real-time image analysis + dynamic light source coordinated adjustment", the contrast detection time for each frame of image is less than 5ms. When overexposed, the drive light source is moved back by 3-5mm and the angle is increased by 5°-10°. When underexposed, it is moved forward by 2-3mm and the angle is decreased by 3°-5°. The contrast of the entire area imaging is stabilized within the acceptable range of 50-150, avoiding the loss of details caused by local overexposure / underexposure.

[0091] The fine-area automatic detection algorithm (Canny edge extraction + gray-scale co-occurrence matrix texture analysis) of the copying machine of this invention can accurately identify texture-dense areas and edge contour areas, triggering an enhancement scheme of "light source moving back and forth by 5mm + angle reduction by 10° + exposure time increase by 20%", improving the local detail recognition rate (such as 0.1mm fabric texture, 0.2mm circuit board lines) from 70% to 99%, achieving fine copying without relying on a high-resolution camera.

[0092] The copying machine of this invention, based on the differences in material, thickness, and surface characteristics of the material being scanned, can drive an external light source device to move in the front-to-back direction. This can be achieved through a rotating shaft and drive motor, allowing for angle adjustment (tilt angle 0-90°). This changes the relative distance and illumination angle between the light source and the material being scanned, thereby dynamically adjusting the lighting intensity and light projection range. The two external light source devices on the upper side can move independently or synchronously in the front-to-back direction, as can the two external light source devices on the lower side. Through single-side single-light source, single-side dual-light source, or coordinated displacement adjustment of the upper and lower light sources, various differentiated lighting environments can be created, including but not limited to concentrated illumination, diffused illumination, single-side tilted enhanced illumination, and double-side symmetrical balanced illumination. This adapts to the scanning needs of different types of materials. Compared to traditional fixed light source equipment, the light source adjustment dimension has been upgraded from "single front-to-back movement" to a dual-dimensional adjustment of "front-to-back + angle," allowing for precise matching of the illumination angle for materials with different reflectivity (such as highly reflective metal surfaces and matte leather surfaces), eliminating glare or shadow interference.

[0093] The copying machine of this invention uses a modular combination of "camera + light source" (5 scanning modes) to be specifically adapted to non-transparent materials (mode 1 / 2), semi-transparent materials (mode 3), thick materials (mode 4), and double-sided materials (mode 5). For example, for semi-transparent frosted plastic boards, the "upper camera + lower light source" mode is used. The lower light source penetrates the material and is scattered by the upper surface, and the upper camera captures the frosted texture, solving the problem of "loss of surface details of semi-transparent materials" in traditional equipment. For double-sided circuit boards, the "dual-sided synchronous scanning" mode is used. The upper and lower cameras collect data synchronously and the collinear design of the baseline ensures the alignment accuracy, avoiding the positioning error caused by the traditional "secondary flip scanning" (the alignment accuracy is improved from ±0.5mm to ±0.1mm).

[0094] The integrated scanning camera of the copying machine of the present invention extends horizontally in the left and right directions and is fixed at both ends. Compared with the traditional splicing camera, it avoids "scanning gaps" caused by splicing gaps. At the same time, the scanning baselines of the upper and lower cameras are collinear, which improves the spatial correspondence of the upper and lower surface images when scanning on both sides, and improves the efficiency of subsequent data comparison by 40%. It is especially suitable for the scenario of "upper and lower surface correlation detection" of composite materials.

[0095] When scanning on both sides, the copying machine of the present invention drives the upper and lower cameras and light source to move synchronously, eliminating the need to scan the upper and lower surfaces twice, thus improving the scanning efficiency by 100%. At the same time, the system automatically completes image stitching, noise reduction and alignment, avoiding the time-consuming and error-prone traditional manual processing.

[0096] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A plate-copying machine based on an integrated seamless scanning camera, characterized in that, include: frame; The object platform is fixed to the frame; A lateral displacement device is movably connected at a position along the length of the frame; A lead screw assembly is installed in the lateral displacement device along the vertical movement direction; The scanning component is connected to the lateral movement device via the lead screw device and is located above and below the object platform. It can move closer to or further away from the object platform via the lead screw device. The scanning component includes an external light source device. as well as The background controller is communicatively connected to the lateral movement device, the lead screw device, and the scanning component, respectively; wherein The background controller controls the lateral movement device to move along the length of the object platform and controls the scanning component to move in the vertical direction to approach or move away from the object platform. At the same time, it provides a light source in the scanning direction to scan the face or face and back of the object to be scanned placed on the object platform and obtain a scanned image. The background controller also controls the illumination angle of the external light source device on the object platform.

2. The plate-copying machine based on an integrated seamless scanning camera according to claim 1, characterized in that, The lateral displacement device includes: A pair of side plates are slidably connected to rails on both sides of the frame in the width direction; A synchronous beam, with its two ends respectively connected to the inner bottom of a pair of side plates; and A pair of lateral lead screw assemblies are respectively disposed at the connection between the side plate and the frame; wherein The lateral lead screw assembly controls a pair of side plates to move synchronously via the synchronous beam.

3. The plate-copying machine based on an integrated seamless scanning camera according to claim 2, characterized in that, The number of lead screw devices is two sets, respectively arranged on the inner surface of the side plate. Each set of lead screw devices includes an upper lead screw device and a lower lead screw device that are vertically coaxially distributed, have the same structure, and are arranged symmetrically. The upper lead screw device and the lower lead screw device each include a lead screw, a lead screw motor, a lead screw fixing block, and a lead screw slide rail arranged in a conventional manner. The lead screw motor controls the rotation of the lead screw and drives the lead screw fixing block to move back and forth along the length direction of the lead screw with the lead screw slide rail as a guide. Each lead screw fixing block is connected to a camera fixing plate for connecting the scanning component.

4. The plate-copying machine based on an integrated seamless scanning camera according to claim 3, characterized in that, The scanning component includes: An integrated scanning camera is connected at both ends to the corresponding camera mounting plates in a pair of side plates, and is used to scan the object to be scanned on the object platform and acquire scanned images; The external light source device is connected at both ends to the corresponding camera fixing plates in a pair of side plates via light source moving screw groups, and is used to provide light source to the object to be scanned on the object platform, and the light source illumination direction is directed towards the scanning area of ​​the integrated scanning camera.

5. The plate-copying machine based on an integrated seamless scanning camera according to claim 4, characterized in that, The integrated scanning camera includes an upper scanning camera and a lower scanning camera with identical structures and opposite installation methods, and each of their ends is respectively connected between a pair of upper lead screw devices and a pair of lower lead screw devices. Both the upper and lower scanning cameras include: The camera profile is a long rectangular cabinet with an internal component housing cavity and a lens housing cavity, and has openings at the top and the bottom of the lens housing cavity; A camera backplate that covers and seals the opening at the top of the camera profile; The chip is horizontally disposed in the lens housing cavity and close to the camera back plate; A glass plate is used to cover and seal the opening at the bottom of the lens receiving cavity; A seamless lens, disposed perpendicularly to the length of the camera profile within the lens housing cavity and in contact with the glass plate, and located below the chip; and A pair of camera light source plates are disposed within the lens housing cavity along the length of the camera profile and are obliquely and symmetrically distributed on both sides of the seamless lens, with the light sources tilted downwards towards the glass plate; wherein The glass plate faces the object platform.

6. The plate-copying machine based on an integrated seamless scanning camera according to claim 5, characterized in that, The number of external light source devices is two sets, arranged in a triangular pattern between a pair of camera mounting plates and the integrated scanning camera. Both external light source devices are located on one side of the glass plate of the integrated scanning camera, and the illumination direction of both external light source devices points towards the scanning area of ​​the integrated scanning camera. Each external light source device includes: The casing is a long rectangular cabinet shape with an opening at the bottom; A cover plate that covers and seals the opening at the bottom of the housing; The light source fixing shaft is located inside the housing; A rotating shaft is formed at both ends of the light source fixing shaft and is rotatably disposed on the inner sides of both ends of the housing in the length direction; and A light source plate is fixed on the light source fixing shaft and generally faces the cover plate; wherein The housing has a pivot seat at the position where it connects to the pivot. The pivot seat contains a drive motor connected to the pivot. The drive motor controls the pivot to rotate and drives the light source fixed shaft to rotate, thereby controlling the direction of the light source board to adjust the illumination angle of the external light source device on the object platform.

7. A method for using a plate-copying machine based on an integrated seamless scanning camera, characterized in that, Includes the following steps: Step 1: Start the copying machine, trigger the system self-test program and move the scanning components to the initial position; Step 2: Perform material pre-analysis on the part to be scanned placed on the object platform, acquire preliminary images and generate pre-analysis results; Step 3: Select a matching scanning mode based on the pre-analysis results to identify fine regions in the image; Step 4: Configure the height parameters and light source parameters of the upper and lower scanning cameras according to the scanning mode; Step 5: Control the lateral shifting device to drive the upper and lower scanning cameras to move along the object platform and perform image acquisition; Step 6: When scanning to a fine area, automatically switch to local enhancement scanning mode; Step 7: After scanning is complete, perform image data processing, including error analysis, position correction, image fusion, and generate image files; Step 8: Save the image file and perform a system reset before shutdown.

8. The method of using the plate-copying machine based on an integrated seamless scanning camera according to claim 7, characterized in that, When configuring the light source parameters in step 4, the formula is used: ; Calculate the light source compensation displacement, which is used to adjust the position of the illumination center so that the position of the light source is aligned with the target area, thereby improving the uniformity of image acquisition; in: This is the amount of synchronous displacement compensation for the light source; Speed-compensation coefficient; This represents the distance the side panel moves.

9. The method of using the plate-copying machine based on an integrated seamless scanning camera according to claim 7, characterized in that, In step 7, image processing is performed using the formula: ; The system performs coordinate correction on the image frames; in: These are the pixel coordinates of the lower surface after the transformation; This is the scaling factor; These are the rotation and shear coefficients; This is the translation amount; And through the formula: ； Calculate the mean error after mapping image points; in: This represents the average distance error. This represents the total number of matching homogeneous feature points; For the upper surface Coordinates of one feature point; To align the lower surface Coordinates of one feature point; To determine the matching accuracy before image stitching or fusion.

10. The method of using the plate-copying machine based on an integrated seamless scanning camera according to claim 9, characterized in that, Once the mean image error meets the set threshold, the system applies a weighted fusion strategy to adjacent image frames. The fusion weights are calculated using the following formula based on the scan position: ； ； in: The weight is the same as the previous frame's weight. Weights for the next frame; x is the horizontal coordinate of the pixel in the overlapping region; The starting and ending horizontal coordinates of the overlapping region The final fused image is obtained by the following formula: ； in: The grayscale value of the merged pixel; These are the grayscale values ​​of the corresponding pixels in the previous and next frames, respectively. The weighted fusion strategy can achieve seamless image transition and brightness balance.

Images