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EP-4737624-A1 - SEWING SYSTEM AND SEWING METHOD

EP4737624A1EP 4737624 A1EP4737624 A1EP 4737624A1EP-4737624-A1

Abstract

A sewing system (100) includes a plurality of imaging devices (37) that acquire images of an object to be sewn (S), one or a plurality of sewing machines (1) that perform sewing based on a recognition result obtained through image recognition processing of the object to be sewn (S), and a data processing unit (50) that acquires template data (70) of the object to be sewn (S) created based on an image captured by a first imaging device (37) among the plurality of imaging devices (37) and transmits the template data to another second imaging device (37). The sewing machine (1) includes inherent data (60B) including imaging conditions of the imaging devices (37). The sewing machine (1) including the second imaging device (37) executes image recognition processing by using template data (72) corrected based on the inherent data (60B) of the second imaging device (37), or corrects a recognition result obtained using the template data (70), based on the inherent data (60B) of the second imaging device (37).

Inventors

  • YAMADA KAZUNORI

Assignees

  • JUKI Corporation

Dates

Publication Date
20260506
Application Date
20240624

Claims (6)

  1. A sewing system comprising: a plurality of imaging devices configured to acquire images of an object to be sewn; one or a plurality of sewing machines configured to perform sewing based on a recognition result obtained through image recognition processing of the object to be sewn; and a data processing unit configured to acquire template data of the object to be sewn created based on an image captured by a first imaging device among the plurality of imaging devices and to transmit the template data to another second imaging device, wherein the sewing machine comprises inherent data comprising imaging conditions of the imaging devices, and the sewing machine comprising the second imaging device performs image recognition processing by using the template data corrected based on the inherent data of the second imaging device, or corrects a recognition result obtained using the template data, based on the inherent data of the second imaging device.
  2. The sewing system according to claim 1, wherein the inherent data comprises a pixel rate, an imaging offset, and illumination information of the imaging device.
  3. The sewing system according to claim 1 or 2, wherein the data processing unit comprises a master data management unit configured to create generalized template data by generalizing template data, based on the template data and inherent data of the first imaging device, and the sewing machine comprising the second imaging device executes image recognition processing by using inherent template data obtained by correcting the generalized template data on the basis of its own inherent data, or corrects a recognition result obtained using the generalized template data, based on its own inherent data.
  4. The sewing system according to claim 3, wherein the data processing unit comprises a data adjustment unit configured to acquire the inherent data of the plurality of imaging devices, and to create the inherent template data for each imaging device on the basis of the inherent data and the inherent template data including the inherent data of the imaging device used in creating the generalized template data or a template, and the sewing machine comprising the second imaging device performs image recognition processing by using its own inherent template data acquired from the data processing unit.
  5. The sewing system according to any one of claims 1 to 4, wherein the sewing machine comprises a plurality of the imaging devices having overlapping regions in which their imaging fields of view partially overlap with each other, and performs image recognition processing based on the template data on a composite image obtained by stitching together a plurality of images obtained from the plurality of imaging devices.
  6. A sewing method using a plurality of sewing machines, each of which comprises an imaging device configured to acquire an image of an object to be sewn and is configured to perform sewing based on a recognition result obtained through image recognition processing of the object to be sewn, or a sewing method using a sewing machine comprising a plurality of the imaging devices, the sewing method comprising: acquiring template data of the object to be sewn created based on an image captured by a first imaging device among the plurality of sewing machines or the plurality of imaging devices, and transmitting the template data to another second imaging device; and in the sewing machine including the second imaging device, executing image recognition processing by using the template data corrected based on inherent data including an imaging condition of the second imaging device, or correcting a recognition result obtained using the template data, based on the inherent data.

Description

TECHNICAL FIELD The present disclosure relates to a sewing system and a sewing method. BACKGROUND ART In order to enhance the design property of an object to be sewn, stitches may be formed on the object to be sewn. Patent Literature 1 discloses a technique for forming stitches on a skin material used for a vehicle seat. CITATION LIST PATENT LITERATURE Patent Literature 1: JP2013-162957A SUMMARY OF INVENTION TECHNICAL PROBLEM A skin material used for a vehicle seat has thickness and elasticity. When a stitch is formed on an object to be sewn having thickness and elasticity, the object to be sewn may be contracted, thereby causing the surface of the object to be sewn to be displaced. For example, when forming a second stitch after a first stitch is formed, it is preferable to form the second stitch at a target position on the object to be sewn according to the displacement of the surface of the object to be sewn caused by the formation of the first stitch. As a measure for forming a stitch at a target position of an object to be sewn, the surface of the object to be sewn may be photographed before sewing processing to detect displacement of the surface of the object to be sewn. For displacement detection, image recognition processing such as template matching is used. When manufacturing the same product by using a plurality of sewing machines in a sewing factory or the like, the plurality of sewing machines form stitches of the same shape on the objects to be sewn of the same shape, and therefore the template data used for image recognition processing is also common. However, in practice, since imaging conditions of imaging devices provided in the respective sewing machines differ due to individual variations, assembly errors, or the like of the imaging devices, template data is prepared separately for each sewing machine. Consequently, the total work man-hours and data management man-hours across all sewing machines increase. An aspect of the present disclosure is to reduce the work man-hours and data management man-hours related to image recognition in a sewing system including a plurality of sewing machines. SOLUTION TO PROBLEM According to a first aspect of the present disclosure, a sewing system is provided, including: a plurality of imaging devices configured to acquire images of an object to be sewn; one or a plurality of sewing machines configured to perform sewing based on a recognition result obtained through image recognition processing of the object to be sewn; and a data processing unit configured to acquire template data of the object to be sewn created based on an image captured by a first imaging device among the plurality of imaging devices and to transmit the template data to another second imaging device, in which the sewing machine includes inherent data including imaging conditions of the imaging devices, and the sewing machine including the second imaging device performs image recognition processing by using the template data corrected based on the inherent data of the second imaging device, or corrects a recognition result obtained using the template data, based on the inherent data of the second imaging device. According to a second aspect of the present disclosure, there is provided a sewing method using a plurality of sewing machines, each of which includes an imaging device configured to acquire an image of an object to be sewn and is configured to perform sewing based on a recognition result obtained through image recognition processing of the object to be sewn, or using a sewing machine including a plurality of the imaging devices, the sewing method including: acquiring template data of the object to be sewn created based on an image captured by a first imaging device among the plurality of sewing machines or the plurality of imaging devices, and transmitting the template data to another second imaging device; and, in the sewing machine including the second imaging device, executing image recognition processing by using the template data corrected based on inherent data including an imaging condition of the second imaging device, or correcting a recognition result obtained using the template data, based on the inherent data. ADVANTAGEOUS EFFECTS OF INVENTION According to the aspect of the present disclosure, it is possible to reduce the work man-hours and data management man-hours related to image recognition in a sewing system including a plurality of sewing machines. BRIEF DESCRIPTION OF DRAWINGS Fig. 1 is a diagram schematically illustrating a sewing system according to the present embodiment.Fig. 2 is a functional block diagram illustrating a sewing machine and a data processing unit according to the present embodiment.Fig. 3 is an illustrative diagram of inherent data provided in a plurality of sewing machines.Fig. 4 is a cross-sectional view illustrating a part of an object to be sewn.Fig. 5 is a plan view illustrating the object to be sewn.Fig. 6 is a cross-sectional view