TWI626171B - Inkjet alignment system and inkjet device with automatic alignment function - Google Patents

Abstract

An ink jet registration system is adapted to obtain a parameter relating to an ink ejection position from a plain vacuum blister sheet having a plurality of dents. The inkjet alignment system includes an imaging unit and a processing unit. The camera unit is configured to illuminate the plain color vacuum absorbing panel and capture at least one image. The processing unit is configured to receive and analyze the image to calculate a plurality of colored blocks respectively defined by the dents, and the processing unit is configured according to the plurality of design blocks and the colored blocks calculated by a design image file. Feature matching is performed to obtain the parameter data related to the result of the feature matching. During the analysis of the image, the processing unit detects the intensity of the light reflected by the plain vacuum blister plate to adjust the light intensity of the camera unit according to the reflection intensity.

Description

Inkjet alignment system and inkjet device with automatic alignment function

The present invention relates to a system and apparatus, and more particularly to an ink jet registration system and an ink jet apparatus having an automatic alignment function.

Since the No Sew process can streamline the manpower requirements of the manufacturing process and reduce the number of processes required for cutting, sewing and finishing, it is possible to reduce manufacturing costs and increase productivity, so that the sewing process is not in the garment and The leather goods industry is gradually being widely used, and vacuum forming technology can quickly form patterns such as stitches, marks or specific patterns to achieve various changes in appearance, so it is most commonly used in the sewing process. .

However, because vacuum blistering techniques must be applied to the mold by heating the blister sheet, softening it, and then vacuum forming. Therefore, the plastic plate must undergo temperature rise and fall during the molding process, and this temperature change process is bound to affect the pigment on the plastic plate, so that the color of the product after molding and the design surface are likely to be greatly different. Therefore, for the shoe industry with high product color requirements to adopt vacuum absorbing technology to make the upper, it is necessary to adjust the process sequence. For example, the plain plastic blister board is vacuum formed to form the upper. Perform an inkjet program. However, for the blister sheet which has been formed into a three-dimensional shape, in order to allow the ink-jet device to correctly perform the ink-jet operation at the corresponding position, it is necessary to adjust the display by the operator. Processing flexibility.

Accordingly, it is an object of the present invention to provide an ink jet aligning system adapted to obtain a parameter relating to an ink ejection position from a plain vacuum blister sheet having a plurality of dents to enable the ink jet apparatus to The position of the ink jet of the plain vacuum blister plate is accurately and automatically adjusted by the parameter data.

Thus, the inkjet alignment system of the present invention comprises an image pickup unit and a processing unit.

The camera unit is configured to illuminate the plain color vacuum absorbing panel and capture at least one image.

The processing unit is configured to receive and analyze the image to calculate a plurality of colored blocks respectively defined by the dents, and the processing unit is configured according to the plurality of design blocks and the colored blocks calculated by a design image file. Feature matching is performed to obtain the parameter data related to the result of the feature matching. During the analysis of the image, the processing unit detects the intensity of the light reflected by the plain vacuum blister plate to adjust the light intensity of the camera unit according to the reflection intensity.

Another object of the present invention is to provide an ink jet apparatus having an automatic alignment function using the above-described ink jet alignment system, which is suitable for at least one plain color vacuum blister plate having a plurality of dents and a design image file. The shape feature is captured and analyzed to obtain a parameter data relating to the ink ejection position, so that the ink jet device can accurately and automatically adjust the position of the ink jet of the plain color vacuum absorbing plate by the parameter data.

The inkjet device comprises a machine unit, a camera unit, and a processing unit.

The machine unit includes an ink jet device, a transport device for transporting the plain vacuum blister plate to the ink jet device, and a bracket disposed above the transport device.

The camera unit is disposed on the bracket and includes at least one camera and a light-receiving device. The camera captures at least one image toward a plain vacuum blister plate on the conveyor. The lighter is illuminated toward the plain vacuum blister panel.

The processing unit includes a controller coupled to the machine unit and the camera unit, and a processor coupled to the controller and storing the design file. The processor receives and analyzes the image to calculate a plurality of colored blocks respectively defined by the dents, and performs feature matching with the colored blocks according to the complex design block calculated by the design image file, and Obtain the parameter data related to the result of the feature matching. The controller controls the inkjet position of the inkjet device relative to the plain vacuum blister plate based on the parameter data. During the analysis of the image, the processor detects the intensity of the light reflected by the plain vacuum blister plate to adjust the light intensity of the light-emitting device according to the reflection intensity.

The effect of the invention is that the inkjet device can automatically and correctly perform the inkjet operation on the corresponding colored block through the machine vision constructed by the image capturing unit and the processing unit, and no need to manually discharge the inkjet device. The plain vacuum blister board enhances productivity and processing flexibility while reducing human resources.

Referring to FIG. 1 and FIG. 2, an embodiment of the inkjet device with automatic alignment function of the present invention comprises a machine unit 100, an image capturing unit 200, and a processing unit 300, and at least one of the plurality of indentations 410 is applicable. The plain vacuum blister panel 400 (see FIG. 5) is captured and analyzed with the shape features of a design image file 500 to obtain a parameter data relating to the ink ejection position. It should be noted that, in this embodiment, the color of the plain vacuum blister panel 400 is white, which is generally the most common color, but not limited thereto, and can be other colors according to product requirements.

The machine unit 100 includes an inkjet device 110, a transport device 120 for transporting the plain vacuum blister panel 400 to the inkjet device 110, and a bracket 130 disposed above the transport device 120.

Referring to FIG. 3 and FIG. 4 , the camera unit 200 includes a camera 210 , a light-receiving device 220 disposed on the bracket 130 and shining toward the plain vacuum blister panel 400 , and a camera 130 disposed on the bracket 130 . The camera 210 is provided with a servo device 230. The camera 210 captures at least one image toward the plain vacuum blister panel 400 on the transport device 120. The servo device 230 is configured to drive the camera 210 to move along a first direction D1.

The processing unit 300 includes a controller 310 that is coupled to the machine unit 100 and the camera unit 200, and a processor 320 that is coupled to the controller 310 and stores the design file 500.

Thereby, the processor 320 receives and analyzes the image to calculate a plurality of colored blocks respectively defined by the dimples 410, and according to the complex design block and the colored regions calculated by the design file 500. The block performs feature matching, and the parameter data related to the result of the feature matching is obtained. Then, the controller 310 can control the inkjet position of the inkjet device 110 relative to the plain vacuum blister plate 400 according to the parameter data, so that the inkjet device 110 can correctly perform in the corresponding colored block. Inkjet operation.

In the process of analyzing the image, the processor 320 performs the following actions to calculate the colored blocks:

First, since the plain vacuum blister panel 400 easily reflects the light of the lighting device 220, causing the image to be overexposed, the image is subjected to exposure compensation. At the same time, the processor 320 analyzes the image to obtain the reflection intensity of the light color absorbing panel 400 on the light, so that the processor 320 can control the lighting of the light-emitting device 220 through the controller according to the reflection intensity. The intensity, and the intensity of the image features of the indentations 410 in the image is increased. In this way, the edge of the dimple 410 in the image can be made obvious, and then the image is gray-scale converted, and an optimized dimple edge is obtained by adjusting a threshold to clearly define the boundary of the colored block. . Next, Wiener deconvolution is applied to enhance the edge of the dimple 410 in the grayscale image and the Canny detector is used to search for the edge of the indented dimple. It is worth mentioning that the lead angle and depth of the dimples 410 also affect the intensity of the light. The smaller the lead angle and the deeper the depth, the easier it is to discriminate the indentations 410, which can reduce the lighting. Strength; on the contrary, the more difficult it is to discriminate. In general, the lead angle of each indentation 410 should be no greater than 0.5 mm and the depth should be no less than 1.7 mm to allow such indentations 410 to clearly appear in the image.

On the other hand, the processor 320 performs feature matching on the plurality of design blocks calculated by the design file 500 and the colored blocks to calculate the rotation of the design blocks corresponding to the colored blocks. The matrix is translated, and the element values in the rotation translation matrix constitute the parameter data. When the inkjet device 110 receives the parameter data and performs an inkjet operation on one of the colored blocks, the corresponding rotational rotation matrix can be found from the design block corresponding to the colored block and the parameter data. Move to the corresponding colored block to perform an inkjet job.

It is to be noted that, in this embodiment, the number of the cameras 210 is one, but not limited thereto, and may be two or more, so that the processor 320 respectively receives images captured by the cameras 210. 3D Reconstruction can be performed according to the images to further obtain the three-dimensional space coordinates of the indentations 410, and to identify the concave-convex structures of the colored blocks. In this way, the parameter data can be introduced into the inkjet path planning, and the inkjet device 110 can be moved more efficiently to the corresponding colored block for inkjet operation, and the identified concave and convex structure can also be used as the image feature. To assist the processor 320 to calculate the parameter data.

In addition, the processor 320 also provides the resolution of the image for the user to refer to during the operation of the colored blocks, and allows the user or the software running in the processor 320 to further adjust the The camera 210 captures the resolution of the image to obtain an optimized operation result. For example, the user can adjust the lens focal length of the camera 210 by optical zooming, or manually or automatically perform digital zooming by using a software, so that the dent feature in the image is more prominent, which helps to improve the lens. The processor 320 calculates the accuracy of the parameter data.

On the other hand, the servo device 230 is controlled by the controller 310, and can drive the camera 210 to move back and forth along the first direction D1, so that the range captured by the image can be expanded not only by means of image grouping. The plurality of plain color vacuum blister panels 400 are covered, so that the processor 320 can simultaneously perform operations on the plain color vacuum blister panels 400 to shorten the overall operation time, and can also effectively be effective by the movement of the camera 210. The image capture angle is reduced, and the image resolution of the solid side of each of the plain vacuum blister panels 400 is improved, thereby improving the accuracy of the processor 320 operation.

In summary, the inkjet device with automatic alignment function of the present invention is aligned by machine vision, and the inkjet device 110 can be automatically and correctly caused to perform inkjet operations on the corresponding colored blocks without Further, it is necessary to artificially discharge the plain vacuum blister board 400 to be ink-jetted, so that the production efficiency and the processing flexibility can be improved, and at the same time, the human resources can be reduced, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still It is within the scope of the patent of the present invention.

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 100······························ Machine unit 110················································································· 130····································································································· ····································································································· ············ Servo device</td><td> 300·········································································· ······························································································· ········································································································ ··········· Design files D1··················································································· ></TABLE>

Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: Figure 1 is a schematic diagram of one embodiment of an ink jet apparatus having an automatic alignment function of the present invention; Figure 3 is a partially enlarged perspective view of the machine unit of the machine unit; Figure 4 is a partially enlarged perspective view of Figure 3 at different viewing angles; And FIG. 5 is a schematic view showing a plain color vacuum absorbing panel having a plurality of dents used in the embodiment.

Claims (9)

An inkjet alignment system adapted to obtain a parameter data relating to an inkjet position from a plain vacuum blister sheet having a plurality of dents, the inkjet aligning system comprising: an imaging unit for facing the element a color vacuum blister plate for illuminating and capturing at least one image; and a processing unit for receiving and analyzing the image to calculate a plurality of colored blocks respectively defined by the dents, and the processing unit is The complex design block calculated by a design file is matched with the colored blocks to obtain the parameter data related to the result of the feature matching. During the analysis of the image, the processing unit detects the plain vacuum. The intensity of the reflection of the light of the plastic plate to adjust the light intensity of the image unit according to the intensity of the reflection, wherein the processing unit signal is connected to the image capturing unit, and the processing unit synchronizes in the process of computing the colored blocks The light intensity of the plain color vacuum blister plate is adjusted by the camera unit to optimize the calculation result. The inkjet aligning system of claim 1, wherein the light intensity of the plain color vacuum absorbing panel of the camera unit is related to a lead angle and a depth of the dents. The inkjet aligning system of claim 2, wherein the camera unit comprises at least one camera, and a servo device provided by the camera, the servo device being controlled by the controller to drive the camera in a first direction mobile. The inkjet aligning system of claim 1, wherein the processing unit performs the following operations to calculate the colored blocks: performing exposure compensation on the image to make the dent edges in the image clear, and then The image is gray scale converted and an optimized dimple edge is obtained by adjusting a threshold to define the colored patches. The inkjet aligning system of claim 1, further comprising a machine unit, the machine unit comprising an inkjet device coupled to the processing unit, the inkjet device receiving the parameter data by the processing unit, And adjusting the ink ejection position of the plain vacuum blister plate according to the parameter data, so as to perform ink ejection in the colored blocks corresponding to the design blocks. An inkjet device with an automatic alignment function, which is suitable for extracting and analyzing at least one plain color vacuum blister plate having a plurality of dents and a shape feature of a design image to obtain a parameter related to the ink ejection position. The inkjet device comprises: a machine unit comprising an inkjet device, a conveying device for conveying the plain vacuum blister plate to the inkjet device, and a bracket disposed above the conveying device An image capturing unit is disposed on the bracket and includes at least one camera and a light-reducing device, and the camera captures at least one image toward the plain vacuum plastic panel on the conveying device, the light-emitting device facing the plain color Vacuum blister board lighting; and a processing unit includes a signal coupled to the machine unit and a controller of the camera unit, and a processor coupled to the controller and storing the design file, the processor receiving and analyzing the image to Calculating a plurality of colored blocks respectively defined by the dents, and performing feature matching on the plurality of design blocks calculated by the design image file and the colored blocks to obtain a parameter related to the result of the feature matching Data, the controller controls the inkjet position of the inkjet device relative to the plain vacuum blister panel according to the parameter data, and during the analyzing the image, the processor detects the light color of the plain vacuum blister panel The intensity of the reflection is adjusted according to the intensity of the reflection, wherein the processing unit signal is connected to the imaging unit, and the processing unit synchronously adjusts the pair of imaging units during the operation of the colored blocks The intensity of the light of the plain vacuum blister plate is optimized to optimize the calculation results. The inkjet device with automatic alignment function according to claim 6, wherein the camera unit comprises a plurality of cameras, the processors respectively receiving images captured by the cameras, and performing three-dimensional reconstruction on the images. An inkjet device with an automatic alignment function according to claim 6, wherein the camera unit further includes a servo device disposed on the bracket and provided for the camera, the servo device being controlled by the controller to drive the camera Move in a first direction. An inkjet device with an automatic alignment function according to claim 8, wherein the light-emitting device is fixedly disposed on the bracket and controlled by the controller to intensity the light, so that the dents are in the image The intensity of the image features increases.