JP2019170659A - Stitch-state checking apparatus - Google Patents

Abstract

To provide a stitch-state checking apparatus capable of accurately checking the state of stitches even when it is not easy to identify the stitches formed on a sewn object.SOLUTION: A stitch-state checking apparatus comprises: an image-taking section for taking an image of a sewn object; and a control section. The control section identifies a reference sewing line which constitutes the sewing pattern of stitches, and controls the image-taking section, thereby taking an image of the sewn object where the stitches have been formed. On the basis of the reference sewing line, the control section identifies the stitches included in the image taken by the image-taking section, and checks the state of the stitches formed on the sewn object.SELECTED DRAWING: Figure 4

Description

  The present disclosure relates to a stitch state confirmation device for confirming a state of a stitch formed on a workpiece.

  Conventionally, a technique for determining whether or not a sewing failure has occurred in a seam formed on a cloth has been considered. For example, in Patent Document 1, a camera is provided downstream of the sewing machine mechanism, the width of the seam is detected from an image captured by the camera, and the detected width of the seam and the width of the normal seam are determined. A technique for detecting the presence / absence of so-called “jumping”, which is an example of defective sewing, is disclosed by comparison.

JP-A-10-170231

  By the way, when the stitches are assimilated to the workpiece, for example, when a stitch is formed on the workpiece to be patterned, it is difficult to identify the stitches themselves. It becomes difficult to confirm.

  The present disclosure has been made in view of the above circumstances, and the purpose of the present disclosure is to accurately check the state of the seam even when it is difficult to specify the seam formed on the workpiece. It is to provide a stitch state confirmation device.

  The stitch state confirmation device according to the present disclosure includes a photographing unit that photographs a sewing object, and a control unit, the control unit specifies a reference sewing line that constitutes a sewing pattern of a stitch, and the photographing unit The sewing product on which a stitch is formed is photographed by controlling a portion, a stitch included in a photographed image photographed by the photographing unit is specified based on the reference sewing line, and the sewing product is specified. It is characterized in that the state of the seam formed in the above is confirmed.

  According to the stitch state confirmation device according to the present disclosure, the reference sewing line constituting the stitch pattern is specified, and the stitch formed on the workpiece is specified based on the reference sewing line. Check the seam condition. As a result, even if it is difficult to specify the stitch, for example, when a stitch is formed on the workpiece to be patterned, the stitch is specified based on the reference sewing line, and the state of the stitch is accurately confirmed. can do.

  In the stitch state confirmation device, the control unit specifies a feature portion of the reference sewing line as a first feature portion, and a feature portion of a stitch included in a photographed image photographed by the photographing unit is a second feature. The reference sewing line is deformed on the basis of the result of comparing the first feature portion and the second feature portion, and the photographing is taken by the photographing portion based on the deformed reference sewing line. The stitches included in the image may be specified and the state of the stitches formed on the sewing product may be confirmed. Accordingly, the reference sewing line can be appropriately deformed based on the comparison between the characteristic portion of the reference sewing line and the characteristic portion of the stitch of the workpiece, and the seam can be accurately identified based on the reference sewing line after the deformation. The eye state can be confirmed with higher accuracy.

  In the stitch state confirmation device, the control unit generates a sewing pattern image representing a sewing pattern of a stitch based on sewing data for forming a stitch on the sewing product, and generates the generated sewing pattern. The first feature may be specified based on an image. Thereby, the characteristic part of the reference sewing line can be accurately identified from the sewing pattern image based on the sewing data. Therefore, the deformation of the reference sewing line can be performed with high accuracy. As a result, the seam can be accurately specified based on the reference sewing line, and the state of the seam can be confirmed with higher accuracy.

  In the stitch state confirmation device, the control unit sets a margin of a predetermined width in the direction orthogonal to the extending direction of the reference sewing line with respect to the reference sewing line, and takes a photographed image photographed by the photographing unit. It may be checked whether the stitches included are within the margin. In this way, by providing a certain margin to the reference sewing line, it is possible to check the state of the stitches while allowing a slight sewing deviation to the extent that inevitably occurs at the time of general sewing, for example.

  In the stitch state confirmation device, the control unit sets a margin of a predetermined width in the direction orthogonal to the extending direction of the reference sewing line with respect to the reference sewing line, and takes a photographed image photographed by the photographing unit. The state of the seam included and which falls within the margin may be confirmed. As a result, it is possible to check the sewing state including the stitches whose deviation from the reference sewing line is within the allowable range.

  In the stitch state checking device, the control unit prevents the margin set in one part of the one reference sewing line from overlapping with the margin set in another part of the one reference sewing line. The predetermined width may be set in That is, when a margin is set for the reference sewing line, the margins at a plurality of locations on the reference sewing line may be set so as not to overlap each other. As a result, even if there are parts that face each other on the same reference sewing line, such as a “U” shape, which margin of the reference sewing line contains the stitches? It can be easily confirmed without being confused.

  In the stitch state confirmation device, when the control unit sets a plurality of the reference sewing lines, the margin set for one reference sewing line does not overlap the margin set for the other reference sewing line. The predetermined width may be set in That is, when setting margins for a plurality of reference sewing lines, it is preferable to set the margins so as not to overlap each other. Thereby, even when a plurality of reference sewing lines are specified, it can be easily confirmed without confusion about which reference sewing line margin includes a stitch.

  In the stitch state confirmation device, the control unit may set the margin when specifying a stitch included in a photographed image photographed by the photographing unit based on the reference sewing line. That is, it is preferable to set a margin when specifying the stitches included in the photographed image based on the reference sewing line. Thereby, it is not necessary to set a margin in advance and hold the data.

  In the stitch state confirmation device, the control unit specifies the reference sewing line constituting a stitch pattern based on sewing data for forming a plurality of stitches on the sewing product, When the reference sewing lines intersect with each other, the sewing images included in the photographed image are formed along a plurality of stitch formation directions formed on the sewing product, which are defined by the sewing data based on the reference sewing lines. You should identify your eyes. Thereby, even in the position where the reference sewing lines intersect each other, the state of the stitch can be confirmed with high accuracy.

The figure which shows schematically the structural example of the stitch state confirmation apparatus which concerns on this embodiment. The figure which shows schematically an example of the sewing pattern image which concerns on this embodiment The figure which shows schematically an example of the picked-up image which concerns on this embodiment The flowchart which shows schematically the example of control of the stitch state confirmation apparatus which concerns on this embodiment. The flowchart which shows roughly the example of control in the matching process which concerns on this embodiment The figure which shows schematically an example of the confirmation method of the state of the seam concerning this embodiment The figure which shows schematically an example of the confirmation method of the state of the stitch by the modification which concerns on this embodiment (the 1) The figure which shows schematically an example of the confirmation method of the state of the seam by the modification which concerns on this embodiment (the 2) FIG. 3 is a diagram schematically illustrating an example of a method for checking a state of a stitch according to a modification according to the embodiment (part 3); FIG. 4 is a diagram schematically illustrating an example of a method for checking a state of a stitch according to a modification according to the embodiment (part 4).

  Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings. A stitch state confirmation device 1 illustrated in FIG. 1 is a device for confirming the state of a stitch N formed on a workpiece W by a known sewing machine 100, and includes a camera 2, a control unit 3, a storage unit 4, and the like. I have. The sewing machine 100 holds the workpiece W and moves the workpiece W in the front-rear and left-right directions according to the coordinates of the needle drop points included in the sewing data, thereby forming a stitch N on the workpiece W. Further, the workpiece W on which the stitches N are formed by the sewing machine 100 is conveyed to the stitch state confirmation device 1 by a conveying device (not shown) as illustrated by an arrow H. The workpiece W is, for example, a thin sheet-like workpiece such as cloth or leather, and may be a plain fabric or a patterned fabric.

  The camera 2 is an example of an imaging unit, and is provided on the top surface inside the imaging box 6 provided in the upper part of the main body 5 of the stitch state confirmation device 1. The imaging lens 2 a of the camera 2 is directed from the upper side to the lower side inside the photographing box 6, and can photograph the workpiece W conveyed on the bottom surface of the photographing box 6.

  The control unit 3 is configured mainly with a microcomputer, for example, and controls the overall operation of the stitch state confirmation device 1 including control of the camera 3 and the like based on a control program and various set values.

  The storage unit 4 is configured by a storage medium such as a hard disk drive, for example, and stores various data necessary for control of the stitch state confirmation device 1. The storage unit 4 stores at least various types of sewing data for forming stitches on the workpiece W. The sewing data includes data indicating the coordinates of a plurality of needle drop points for forming a plurality of stitches. An order is associated with each of the coordinates of the plurality of needle drop points, and the sewing machine 100 forms a stitch by dropping the needle at each coordinate according to this order. In addition, as an order matched with the needle drop point, a code indicating a rank may be associated with the needle drop point, and the needle drop order corresponds by arranging data indicating each coordinate in the needle drop order. It may be attached. Further, according to the sewing data, the stitch formation direction can be defined by associating the order with each needle drop point. The sewing data is provided from the sewing machine 100 to the stitch state confirmation device 1 via wireless communication or wired communication, for example.

  The control unit 3 can generate the sewing pattern image GA illustrated in FIG. 2 based on the sewing data stored in the storage unit 4, more specifically, data indicating the coordinates of a plurality of needle drop points. It is. The sewing pattern image GA is an image representing the sewing pattern PA of the stitch N formed on the workpiece W, that is, the size and shape of the pattern by the stitch N that should be formed based on the sewing data. The sewing pattern PA is represented by each needle drop point specified by the sewing data. And the control part 3 specifies the feature point A of the reference | standard sewing line LA which comprises the sewing pattern PA of a stitch by performing the feature point detection process by well-known image processing, for example to the produced | generated sewing pattern image GA. It is possible.

  The feature point A is a point where some change in the shape is recognized, such as a portion where the shape is an acute angle, a portion that is greatly curved, or a portion where the stretching direction is reversed. Moreover, the control part 3 can specify the magnitude | size, shape, etc. of the reference | standard sewing line LA to some extent or completely by correlating the specified several feature point A mutually. In FIG. 2, not all feature points A are indicated by reference numerals, but more feature points A can be identified by increasing the accuracy of image processing, for example, the size of the reference sewing line LA, The shape and the like can be specified with higher accuracy.

  Further, the control unit 3 can obtain the captured image GB illustrated in FIG. 3 by controlling the camera 2. The photographed image GB is a sewing pattern PB represented by the actual stitch N formed on the workpiece W to be photographed, that is, the size of the pattern by the stitch N actually formed on the workpiece W based on the sewing data. It is an image representing the shape and the like. And the control part 3 performs the feature point detection process by the well-known image processing, for example to the picked-up image GB obtained by the camera 2, By this, the actual sewing line LB which comprises the sewing pattern PB of the actual stitch N is demonstrated. It is possible to specify the feature point B.

  Note that the characteristic point B is a point where some change in the shape is recognized, such as a portion where the shape is an acute angle, a portion that is largely curved, or a portion where the extending direction is reversed. In addition, the control unit 3 can specify the size, shape, and the like of the actual sewing line LB to some extent or completely by associating the plurality of specified feature points B with each other. In FIG. 3, all feature points B are not indicated by reference numerals, but more feature points B can be identified by increasing the accuracy of image processing, for example, and the size of the actual sewing line LB, The shape and the like can be specified with higher accuracy.

  Next, a control example of the stitch state confirmation device 1 will be described. As illustrated in FIG. 4, the control unit 3 generates a sewing pattern image GA based on the sewing data stored in the storage unit 4 (S1). And the control part 3 specifies the feature point A of the reference | standard sewing line LA based on the produced | generated sewing pattern image GA (S2). Further, the control unit 3 controls the camera 2 to photograph the workpiece W in which the stitches N are actually formed based on the sewing data (S3). And the control part 3 specifies the feature point B of the actual stitch N contained in the picked-up image GB image | photographed with the camera 2 (S4).

  And the control part 3 performs the matching process of the specified feature point A and the feature point B (S5). This matching process is a process of calculating the degree of coincidence between the identified feature point A and feature point B, correcting the coordinate value of the feature point A based on the calculated degree of coincidence, that is, transforming the reference sewing line LA. It has become. That is, as illustrated in FIG. 5, in this matching process, the control unit 3 first sets “∞ (infinity)” as the initial value of the reference matching degree Pk (A1). Then, the control unit 3 compares the coordinate value of the feature point A of the reference sewing line LA specified in step S2 with the coordinate value of the feature point B of the stitch N specified in step S4, thereby matching the two. The degree P is calculated (A2). It is shown that the smaller the matching degree P, that is, the smaller the difference between the coordinate value of the feature point A and the coordinate value of the feature point B, the closer or coincides with the reference sewing line LA and the stitch N. Then, the control unit 3 compares the calculated degree of coincidence P with the reference degree of coincidence Pk (A3).

  When the calculated matching score P is greater than the reference matching score Pk, that is, when the feature point A and the feature point B do not match (A3: NO), the control unit 3 sets the coordinate value of the feature point A. Then, it is corrected so as to approximate or completely match the feature point B (A4). The reference sewing line LA specified by associating the corrected feature points A with each other is obtained by deforming the original reference sewing line LA before the correction. Further, “deformation” in the present disclosure includes enlargement, reduction, rotation, shift, and the like of a pattern formed by the reference sewing line LA. Then, the control unit 3 calculates the coincidence degree P again based on the coordinate value of the corrected feature point A (A2), and compares the magnitude relationship between the corrected coincidence degree P and the reference coincidence degree Pk (A3). .

  Then, when the calculated coincidence P is smaller than the reference coincidence Pk, that is, when the feature point A and the feature point B are approximate or completely coincident (A3: YES), the control unit 3 The value of the coincidence Pk is updated to the value of the coincidence P calculated at that time (A5). And the control part 3 memorize | stores the coordinate value of the feature point A in the time in the memory | storage part 4 (A6).

  The coordinate value correction process in step A4 described above may be performed while appropriately adjusting the correction value when executing the correction process, or a plurality of correction patterns are prepared in advance, and each correction pattern is corrected. May be performed by fitting. When the coordinate value is corrected by fitting a plurality of correction patterns, if there is a pattern in which the corrected matching degree P matches the reference matching degree Pk, the pattern is stored in step A6 and matched. When there is no pattern to be corrected, it is preferable to store the pattern in which the corrected matching degree P is closest to the reference matching degree Pk in step A6.

  When the matching process described above is completed, the control unit 3 corrects the sewing data stored in the storage unit 4 based on the coordinate value of the feature point A stored in the storage unit 4 (S6). At this time, the control unit 3 makes the formation position of the stitch N with respect to the workpiece W defined in the sewing data, that is, a so-called needle drop point, coincide with the coordinate value of the feature point A stored in the storage unit 4. Correct it. When the coordinate value of the feature point A is not corrected in the above-described matching process, the sewing data after correction remains the same as the original sewing data before correction.

  And the control part 3 will confirm the state of the stitch N contained in the picked-up image GB, if the correction process of sewing data is completed (S7). That is, the control unit 3 specifies the reference sewing line LA based on the sewing data at that time. Then, the control unit 3 associates the feature point B in the photographed image GB with the feature point A whose coordinate value coincides with the feature point B in S5, thereby determining the position of the reference sewing line LA in the photographed image GB. Identify. The control unit 3 identifies the stitch N included in the photographed image GB based on the reference sewing line LA whose position in the photographed image GB is identified. Here, the position of the reference sewing line LA in the photographed image GB is the line formed by the actual stitch N that should have been formed on the workpiece W based on the sewing data in the photographed image GB, that is, the actual sewing line LB. Matches the position of. Therefore, the control unit 3 specifies the stitches N included in the photographed image GB, that is, the stitches N constituting the actual sewing line LB, based on the position of the reference sewing line LA in the photographed image GB. Specifically, the control unit 3 specifies the stitch N that overlaps the reference sewing line LA. Then, the control unit 3 confirms the state of the identified stitch N. The state of the stitch N is confirmed by detecting the width of the specified stitch from the photographed image GB as described in, for example, Japanese Patent Laid-Open No. 10-170231, and the detected width of the stitch and the normal width. The state of the stitch N may be confirmed by comparing the width dimension of the stitch, or the stitch state of the stitch N that overlaps the reference sewing line LA may be confirmed. Since the control unit 3 checks the state of the stitch N at a place where it is estimated that the stitch N is formed based on the reference sewing line LA, the stitch N is assimilated with the workpiece W such as a pattern. Even in such a case, the stitches N can be specified with high accuracy.

  In the example shown in FIG. 6, in a portion indicated by points P1, P2, etc., a sewing failure in which the stitches N fly, so-called “flying stitches”, or a sewing failure in which the intervals between the stitches N are not uniform occurs. However, the plurality of stitches N constituting the actual sewing line LB are regularly arranged, and the plurality of stitches N are along the reference sewing line LA. Therefore, the control unit 3 determines that the sewing state at these points P1 and P2 is “good”. On the other hand, in the portion indicated by the point P3, “stitch skipping” occurs at the stitch N. Therefore, the control unit 3 determines that the sewing state at the point P3 is “defective”. In FIG. 6, for convenience of explanation, the reference sewing line LA and the actual sewing line LB are slightly shifted. However, in the actual state confirmation processing, the position of the reference sewing line LA matches the position of the actual sewing line LB.

  According to the stitch state confirmation device 1 according to the present embodiment, the reference sewing line LA that constitutes the sewing pattern of the stitch N is specified, and the stitch formed on the workpiece W based on the reference sewing line LA. N is specified, and the state of the stitch N is confirmed. Thus, even when it is difficult to specify the stitch N, for example, when the stitch N is formed on the workpiece W of the patterned article, the stitch N can be specified based on the reference sewing line LA, and the state of the stitch N Can be confirmed with high accuracy.

  Further, according to the stitch state confirmation device 1, the control unit 3 identifies the feature point A of the reference sewing line LA, identifies the feature point B of the actual stitch N included in the photographed image GB, and the feature point. Based on the result of comparing A and the feature point B, the reference sewing line LA is deformed. Then, the control unit 3 identifies the stitch N included in the photographed image GB based on the deformed reference sewing line LA, and confirms the state of the stitch N formed on the workpiece W. Accordingly, the reference sewing line LA is appropriately deformed based on the comparison between the feature point A of the reference sewing line LA and the feature point B of the stitch N actually formed on the workpiece W, and the reference sewing line LA after the deformation is changed. By specifying the seam N with high accuracy based on the above, the state of the seam N can be confirmed with higher accuracy.

  Further, according to the stitch state confirmation device 1, the control unit 3 generates the sewing pattern image GA based on the sewing data for forming the stitch N on the workpiece W, and based on the generated sewing pattern image GA. The feature point A of the reference sewing line LA is specified. Thereby, the feature point A of the reference sewing line LA can be accurately identified from the sewing pattern image GA based on the sewing data. Accordingly, the deformation of the reference sewing line LA can be performed with high accuracy, and consequently, the stitch N can be specified with high accuracy based on the reference sewing line LA, and the state of the stitch N can be confirmed with higher accuracy.

  In addition, this indication is not restricted to one embodiment mentioned above, For example, it can deform | transform or expand as follows.

  As illustrated in FIG. 7, the control unit 3 may be configured to set a margin M having a predetermined width in the direction perpendicular to the extending direction of the reference sewing line LA with respect to the reference sewing line LA. Then, the control unit 3 may be configured to confirm whether or not the stitches N included in the photographed image GB are within the margin M and confirm the state of the stitches N that are within the margin M. . In this way, by providing a certain margin M to the reference sewing line LA, for example, the state of the stitches N is checked while allowing a slight sewing deviation that inevitably occurs during general sewing. Can do. Further, it is possible to check the sewing state including the stitches N where the degree of deviation from the reference sewing line LA is within the allowable range. 7 and FIGS. 8 and 9 described later show a state where the actual sewing line LB is actually deviated from the position of the reference sewing line LA, unlike FIG.

  Further, as illustrated in FIG. 8, the control unit 3 has a predetermined width so that a margin Ma set in a part of one reference sewing line LA does not overlap a margin Mb set in another part of the reference sewing line LA. It is good to comprise so that it may set. That is, when the margin M is set for one reference sewing line LA, the margins Ma and Mb at a plurality of locations on the reference sewing line LA may be set so as not to overlap each other. As a result, even if there is a portion such as a “U” shape that faces the same reference sewing line LA, the margin M of any part of the reference sewing line LA includes the stitch N. It can be easily confirmed without being confused.

  Further, as illustrated in FIG. 9, when setting a plurality of reference sewing lines LA, the control unit 3 overlaps a margin M set for one reference sewing line LA with a margin M set for another reference sewing line LA. In order to avoid this, a predetermined width of each margin M may be set. That is, when the margins M are set for the plurality of reference sewing lines LA, the margins M should be set so as not to overlap each other. Thereby, even when a plurality of reference sewing lines LA are specified, it can be easily confirmed without being confused as to which margin M of the reference sewing line LA contains the stitches.

  The controller 3 may be configured to set the margin M when specifying the stitch N included in the captured image GB based on the reference sewing line LA. Thereby, it is not necessary to set the margin M in advance and hold the data in the storage unit 4, and the storage unit 4 having a limited storage capacity can be effectively used for other storage purposes. The stitch state confirmation device 1 has a configuration in which, for example, when a sufficient storage capacity can be secured in the storage unit 4, a margin M is set in advance and the data is stored in the storage unit 4. It is also permissible. Thereby, it is not necessary to set the margin M each time the state confirmation of the stitch N is executed, and the processing load on the control unit 3 can be reduced.

  Further, as illustrated in FIG. 10, when the reference sewing lines LA intersect each other, more specifically, when the same reference sewing line LA intersects with each other at different locations of the reference sewing line LA, The control unit 3 may specify the stitch N included in the captured image GB along the formation direction D of the plurality of stitches defined by the sewing data. That is, when the reference sewing line LA intersects, the stitch N may be specified along the direction D in which the stitch is formed according to the order associated with the plurality of needle drop coordinates included in the sewing data. Thereby, the control unit 3 can specify, for example, that the stitch next to the stitch Na is the stitch Nb, and the stitch next to the stitch Na is the stitch Nc or the stitch Nd. Can be prevented from being erroneously recognized. Thus, even at the position where the reference sewing line LA intersects, the formation direction D of the stitch N can be correctly recognized, and the state of the stitch N can be confirmed with high accuracy. In this case, as described above, the margin M having a predetermined width may be set in a direction orthogonal to the extending direction of the reference sewing line LA.

  Further, the control unit 3 may be configured to specify not a feature point A of the reference sewing line LA but a portion showing a characteristic shape in the reference sewing line LA, that is, a feature portion. In addition, the control unit 3 is configured to specify not the feature point B of the stitch N actually formed on the workpiece W but the portion showing the characteristic shape in the actual stitch N, that is, the feature portion. May be.

  1: stitch state checking device, 2: camera (photographing unit), 3: control unit, W: work (workpiece)

Claims (9)

A shooting section for shooting the sewing object;
A control unit;
With
The controller is
Identify the reference sewing lines that make up the seam pattern,
By controlling the imaging unit, the sewn product formed with seams is photographed,
A stitch state confirmation characterized by identifying a stitch included in a photographed image photographed by the photographing unit based on the reference sewing line and confirming a state of a stitch formed on the sewing product. apparatus. The controller is
Specifying the characteristic part of the reference sewing line as the first characteristic part;
A stitch feature included in a photographed image photographed by the photographing unit is identified as a second feature,
Based on the result of comparing the first feature and the second feature, the reference sewing line is deformed,
The stitches included in a photographed image photographed by the photographing unit are specified based on the deformed reference sewing line, and the state of the stitches formed on the sewing product is confirmed. The stitch state confirmation device according to 1. The controller is
Based on sewing data for forming a stitch on the sewing product, a sewing pattern image representing a sewing pattern of the stitch is generated,
The stitch state confirmation device according to claim 2, wherein the first characteristic portion is specified based on the generated sewing pattern image. The controller is
For the reference sewing line, set a margin of a predetermined width in a direction orthogonal to the extending direction of the reference sewing line,
The stitch state confirmation device according to any one of claims 1 to 3, wherein it is confirmed whether or not a stitch included in a photographed image photographed by the photographing unit is within the margin. . The controller is
For the reference sewing line, set a margin of a predetermined width in a direction orthogonal to the extending direction of the reference sewing line,
5. The stitch according to claim 1, wherein the stitch is included in a photographed image photographed by the photographing unit and the state of the stitch that falls within the margin is confirmed. Eye condition confirmation device. The controller is
The predetermined width is set such that the margin set in one part of the one reference sewing line does not overlap the margin set in another part of the one reference sewing line. Item 6. The seam state confirmation device according to item 4 or 5. The controller is
When the plurality of reference sewing lines are set, the predetermined width is set so that the margin set for one reference sewing line does not overlap with the margin set for another reference sewing line. The stitch state confirmation device according to any one of items 4 to 6.   The said control part sets the said margin, when specifying the seam contained in the picked-up image image | photographed by the said imaging | photography part based on the said reference | standard sewing line, The any one of Claim 4-7 characterized by the above-mentioned. The stitch state confirmation device described in 1. The controller is
Based on the sewing data for forming a plurality of stitches on the workpiece, the reference sewing line constituting the stitch pattern is specified,
When the reference sewing lines intersect with each other, they are included in the photographed image along the formation direction of a plurality of stitches formed on the sewing product, which is defined by the sewing data based on the reference sewing line. The stitch state confirmation device according to any one of claims 1 to 8, wherein a stitch is specified.

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