JP6389380B2 - Inspection device - Google Patents

Description

  The present invention relates to an inspection apparatus.

  As a conventional inspection apparatus, for example, an apparatus described in Patent Document 1 is known. The inspection apparatus described in Patent Document 1 is an apparatus that inspects an article in which contents are wrapped with a packaging material, acquires a band-shaped partial image including a seal portion from the image of the article, and foreign objects exist in the partial image. It is determined whether or not. In this inspection apparatus, when an article is tilted with respect to a predetermined direction, an image of the article is rotated and corrected, and a partial image is acquired from the corrected image.

JP 2013-7597 A

  Generally, in image processing for rotating an image, which pixel before rotation corresponds to which pixel before rotation, that is, which position in the image before rotation corresponds to the pixel position after rotation. Need to ask. In the process of rotating only the image of the article in the image as in the conventional inspection apparatus, it is difficult to accurately associate the position of the pixel before rotation of the article with the position of the pixel after rotation. The accuracy of the image of the article may be lowered. Therefore, in the conventional inspection apparatus, there is a possibility that a belt-like partial image including the seal portion cannot be accurately obtained from the corrected article image. Therefore, the conventional inspection apparatus may not be able to accurately inspect the seal portion.

  An object of this invention is to provide the inspection apparatus which can test | inspect well the seal | sticker part in the inclined article | item.

  An inspection apparatus according to the present invention includes a light irradiation unit that irradiates light on an article whose contents are packaged in a packaging material, an image generation unit that generates a transmission image including the article based on light transmitted through the article, And a determination unit that determines whether there is a defect in the sealing portion of the packaging material based on the transmission image generated by the image generation unit, wherein the determination unit is configured such that the article region corresponding to the article is a transmission image. In the case of tilting with respect to the arrangement direction which is the column direction and the column direction of the pixel, the area containing the contents is set as a mask area based on the article area and the mask creation area including the article area, Based on the transmission image and the mask area, the presence or absence of a defect in the seal portion is determined.

  In this inspection apparatus, the determination unit sets the region containing the contents as the mask region based on the article region and the mask creation region including the article region, and the seal unit based on the transmission image and the mask region. The presence or absence of a defect is determined. Thereby, in the inspection apparatus, even if the article region is inclined with respect to the arrangement direction of the transmission image (the article is inclined with respect to the transport direction), the contents are not rotated without rotating the article region. A mask area can be set in the accommodated area. Therefore, the inspection apparatus can determine whether there is a defect in the seal portion based on the transmission image and the mask area. Therefore, the inspection apparatus can satisfactorily inspect the seal portion of the tilted article.

  In one embodiment, the mask creation area may be moved along one direction of the arrangement direction with respect to the article area. Thus, in the inspection apparatus, the mask creation area is translated along one direction (column direction, row direction) in the arrangement direction with respect to the article area, and, for example, a logical operation is performed in the article area and the moved mask creation area. By doing this, the mask region can be set satisfactorily. As a result, in the inspection apparatus, the seal portion can be inspected satisfactorily.

  In one embodiment, the packaging material is formed with a pair of seal portions at positions facing each other, and the mask creation region includes a first mask creation region overlapping the article region, and an outer side of one seal portion. Two first imaginary lines extending from each of the tops to the end of the transmission image, and two second imaginary lines extending from each of the tops outside the other seal part to the end of the transmission image, And a first mask creation region and a second mask creation region surrounded by the first mask creation region. In this way, by setting the second mask creation area in the mask creation area, even if the mask creation area is moved in the arrangement direction, it does not deviate from the contents storage area, so the mask area can be set more accurately. it can.

  In one embodiment, each of the first virtual line and the second virtual line may extend in the same direction as the extending direction of the virtual line that linearly connects the tops of the seal portions. Thus, when the first virtual line and the second virtual line are set, the second mask creation region can be set satisfactorily. In addition, since the first virtual line and the second virtual line can be set quickly, the processing speed can be increased.

  In one embodiment, each of the first imaginary line and the second imaginary line may extend in the arrangement direction from the top of the seal part to the end of the transmission image. Thus, when the first virtual line and the second virtual line are set, the second mask creation region can be set satisfactorily. The first imaginary line and the second imaginary line can be created regardless of the shape of the outer edge of the seal portion. Therefore, the inspection apparatus can appropriately create a mask creation region.

  In one embodiment, the article has a substantially rectangular shape, and the determination unit may move the mask creation region by the number of the seal portions when the number of the seal portions is 1 or more and 4 or less. Thereby, a mask area | region can be set rapidly and correctly.

  In one embodiment, the determination unit may rotate the transmission image by 90 ° when the inclination angle with respect to one direction of the arrangement direction of the article regions is larger than 45 °. When the inclination angle of the article region is larger than 45 °, there is a possibility that the length and the width of the article region are erroneously recognized, which may cause the mask region to be set erroneously. Accordingly, when the inclination angle of the article region is larger than 45 °, the transmission image is rotated by 90 ° to prevent erroneous recognition of the article region between the vertical and horizontal directions, and the mask region can be set satisfactorily.

  In one embodiment, the determination unit may display the transparent image and the mask region on the display unit in an overlapping manner. Thereby, the seal part used as a test | inspection area | region can be confirmed in a display part.

  ADVANTAGE OF THE INVENTION According to this invention, the test | inspection of the seal part in the inclined article can be performed favorably.

It is a side view of the near-infrared inspection apparatus concerning one embodiment. It is a top view of the conveyance line in which the near-infrared inspection apparatus of FIG. 1 was installed. It is a control block diagram which shows the structure of the control computer with which the near-infrared inspection apparatus of FIG. 1 is provided. It is a figure which shows the permeation | transmission image produced | generated by the image generation part. It is a figure which shows the article | item area | region set by the judgment part. It is a figure which shows the creation area set by the judgment part. It is a figure which shows the preparation procedure of a mask preparation area | region. It is a figure which shows the preparation procedure of a mask preparation area | region. It is a figure which shows the movement of a mask preparation area | region. It is a figure which shows the movement of a mask preparation area | region. It is a figure which shows a mask area | region. It is a figure which overlaps and shows a transparent image and a mask area | region. It is a figure for demonstrating the shift | offset | difference of a mask area | region. It is a figure which shows the other preparation procedure of a mask preparation area | region.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

(1) Overall Configuration The near-infrared inspection apparatus 1 shown in FIGS. 1 and 2 is an apparatus for inspecting an article G having a packaging material made of a resin film and contents contained in the resin film. The article G is, for example, a bag-like confectionery that is conveyed on a conveyance line for food or the like. The packaging material is made of a material having optical transparency such as a transparent material or a translucent material. The package material itself may have a color, or the package may be colored by printing or the like.

  The near-infrared inspection device (inspection device) 1 includes a light irradiation unit 2, a light detection unit 3, a control computer 4, and a distribution mechanism 5. The light irradiation unit 2 is disposed below the conveyors 11 and 12. The light detection unit 3 is disposed above the conveyors 11 and 12. The light irradiation unit 2 and the light detection unit 3 face each other through a gap provided between the transport conveyors 11 and 12.

  The light irradiation unit 2 includes a near infrared irradiator 13 that extends along the gap below the gap between the conveyors 11 and 12. The light irradiation unit 2 irradiates the article G with near infrared rays from the near infrared irradiator 13 when the article G conveyed by the conveyors 11 and 12 passes over the gap between the conveyors 11 and 12. The near infrared wavelength is 780 nm to 1400 nm.

  The light detection unit 3 has a near-infrared line sensor 14 that extends along the gap above the gap between the conveyors 11 and 12. The light detection unit 3 uses the near-infrared line sensor 14 to transmit near-infrared light transmitted to the article G when the article G conveyed by the conveyors 11 and 12 passes over the gap between the conveyors 11 and 12. Detect and output detection signal.

  The near-infrared line sensor 14 detects near-infrared rays that have passed through the article G. The near-infrared line sensor 14 has a plurality of detection elements 14a (see FIG. 3) arranged in a row in a horizontal direction orthogonal to the conveyance direction of the article G by the conveyance conveyors 11 and 12.

  The light irradiation unit 2 and the light detection unit 3 are cantilevered by a support column 7 erected on the pedestal 6 with the near-infrared optical path from the light irradiation unit 2 to the light detection unit 3 exposed to the surrounding atmosphere. Yes. Note that the inspection area of the article G may be covered with a shield box or the like.

  The control computer 4 is housed in the column 7 and performs operation control of the near-infrared inspection apparatus 1 and various signal processing. In addition to the control computer 4, the column 7 is provided with a display unit such as a display and an operation unit such as a touch button. However, the control computer 4, the display unit, and the operation unit may be provided in a control box prepared separately from the base 6 and the support column 7.

  As shown in FIG. 2, the distribution mechanism 5 is disposed on the downstream side of the near-infrared inspection apparatus 1. The distribution mechanism 5 distributes the articles G that are continuously conveyed to the near-infrared inspection apparatus 1 by the conveyors 11 and 12. When there is a defect in the article G, the sorting mechanism 5 operates the arm 5a to send the article G to the collection box 90 that is removed from the regular line conveyor 80.

(2) Configuration of Control Computer The control computer 4 is a part that controls various operations in the near-infrared inspection apparatus 1, and includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The The control computer 4 acquires a near-infrared transmission image of the article G based on the detection signal output from the light detection unit 3, and based on the grayscale value per pixel in the infrared transmission image, the seal portion has a sealing failure. Then, the presence or absence of foreign matter other than the contents in the packaging material, the presence or absence of cracks in the contents, the presence or absence of biting of the contents into the seal portion, the presence or absence of bending of the seal portion, etc. are determined. In the present embodiment, a case will be described in which the control computer 4 determines whether or not there is a seal failure in the seal portion.

  As shown in FIG. 3, the control computer 4 includes an image generation unit 41 and a determination unit 43 as conceptual parts for executing various control processes in the near-infrared inspection apparatus 1. Such a conceptual part can be configured as software that is executed by the CPU after a program stored in the ROM is loaded onto the RAM, for example. The control computer 4 may be configured as hardware such as an electronic circuit.

(2-1) Image Generation Unit The image generation unit 41 is a part that generates a transmission image of the article G based on light transmitted through the article G. Specifically, the image generation unit 41 generates a transmission image 50 including the article G as shown in FIG. 4 based on the detection signal continuously transmitted from the near-infrared line sensor 14. The image generation unit 41 adjusts the brightness of the transmission image 50 when the brightness of the image based on the detection signal is low. The image generation unit 41 outputs the generated transparent image 50 to the determination unit 43.

  As shown in FIG. 4, the article G is obtained by packaging the contents 61 in a packaging material 60. The contents 61 are accommodated in the region S of the packaging material 60. The article G (wrapping material 60) has a substantially rectangular shape. A pair of seal portions 62 are formed in the packaging material 60 at positions facing each other. Each of the seal portions 62 has, for example, a substantially rectangular shape.

(2-2) Determination Unit The determination unit 43 determines whether there is a defect in the sealing unit 62 of the packaging material 60 based on the transmission image 50 generated by the image generation unit 41. When the determination unit 43 receives the transmission image 50 output from the image generation unit 41, the determination unit 43 binarizes the transmission image 50 and, as shown in FIG. 5, the item corresponding to the item G in the binarized image. Region 52 is set. In FIG. 5, the article region 52 is indicated by diagonal lines, but in reality, the article region 52 is converted to two gradations of black and the other regions are white by binarization processing.

  The determination unit 43 determines whether or not the article region 52 is tilted with respect to the pixel column direction in the transmission image 50 and the arrangement direction which is the column direction. The column direction of the pixels is the X direction in FIG. 5, and the row direction of the pixels is the Y direction in FIG. For example, the determination unit 43 sets a substantially rectangular frame that passes through the four tops of the article region 52, and the article region 52 is arranged when the sides of the frame are inclined at a predetermined angle or more with respect to the arrangement direction. Judged to be tilted relative to the direction. The inclination of the article region 52 may be determined by other methods.

  When the article region 52 is tilted with respect to the arrangement direction of the pixels of the transmission image 50, the determination unit 43 determines the content based on the article region 52 and the mask creation region M including the article region 52 (see FIG. 6). The area S in which the object 61 is accommodated is set as a mask area MA (see FIG. 11). The mask creation area M is an area set for creating the mask area MA. A specific method for creating the mask creation region M will be described with reference to FIGS.

  As shown in FIG. 6, the mask creation area M includes a first mask creation area M1, a second mask creation area M2, and a second mask creation area M3. In FIG. 6, the mask creation area M is indicated by oblique lines, but actually, the entire mask creation area M is filled. The same applies to the mask area MA.

  The determination unit 43 creates a first mask creation region M1 that overlaps the article region 52, as shown in FIG. The first mask creation area M1 has substantially the same shape as the article area 52.

  Further, as shown in FIG. 8, the determination unit 43 extends along the row direction (Y direction) from the portion corresponding to the top portion C <b> 1 outside the one seal portion 62 to the end portion 50 a of the transmission image 50. A first imaginary line L1 is created, and a second imaginary line L3 extending in the row direction from the portion corresponding to the outer top portion C3 of the other seal portion 62 to the end portion 50a is created, as shown in FIG. As described above, an area surrounded by the first virtual line L1, the second virtual line L3, and the first mask creation area M1 is set as the second mask creation area M2.

  As shown in FIG. 8, the determination unit 43 extends in the row direction (Y direction) from the portion corresponding to the outer top portion C <b> 2 of one seal portion 62 to the end portion 50 b of the transmission image 50. A virtual line L2 is created, and a second virtual line L4 extending in the row direction from the portion corresponding to the top portion C4 outside the other seal portion 62 to the end portion 50b is created, as shown in FIG. In addition, an area surrounded by the first virtual line L2, the second virtual line L4, and the first mask creation area M1 is set as the second mask creation area M3. Through the above processing, the determination unit 43 sets a region including the first mask creation region M1, the second mask creation region M2, and the second mask creation region M3 as the mask creation region M.

  When the determination unit 43 sets the mask creation area M, the determination unit 43 sets the area S containing the contents 61 as the mask area MA based on the article area 52 and the mask creation area M. Specifically, the determination unit 43 moves the mask creation area M in parallel along the arrangement direction (in the row direction in the present embodiment), and performs masking based on the moved mask creation area M and the article area 52. Region MA is set. Regarding the movement of the mask preparation region M, the number of movements of the mask preparation region M is the number of seal portions formed on the packaging material when the article G has a substantially rectangular shape and the number of seal portions is 1 or more and 4 or less. Is set according to In the present embodiment, since two sealing portions 62 are formed on the packaging material 60, the determination portion 43 moves the mask creation region M twice. Note that the number of the seal parts 62 is input by an operation part such as a touch button, and is preset in the control computer 4.

As shown in FIG. 9, the determination unit 43 translates the mask creation region M to the right side in the drawing along the pixel column direction with respect to the article region 52. The amount of movement of the mask creation region M is equal to the width dimension of the seal portion 62 of the packaging material 60. The width dimension of the seal portion 62 is acquired from the transmission image 50 shown in FIG. Further, determination unit 43, as shown in FIG. 10, the mask creation area M, moves parallel to the leftward side in the column direction of the pixel with respect to the article area 52.

  The determination unit 43 performs a logical operation on the article region 52 shown in FIG. 5, the mask creation region M after movement shown in FIG. 9, and the mask creation region M after movement shown in FIG. The mask area MA is set as shown in FIG. Specifically, the determination unit 43 obtains a logical sum of the article region 52 and the moved mask creation region M, and sets the mask region MA.

  When the mask area MA is set, the determination unit 43 determines whether there is a defect in the seal part 62 of the packaging material 60 based on the image in which the mask area MA is superimposed on the transmission image 50 as shown in FIG. . The determination unit 43 determines the seal failure of the seal portion 62, the presence / absence of the content 61 in the seal portion 62, the presence / absence of bending of the seal portion 62, and the like. The determination unit 43 outputs the determination result to the distribution mechanism 5. Note that the determination unit 43 may output a signal that causes the display to display an image in which the mask area MA is superimposed on the transmission image 50 when determining whether or not the seal unit 62 is defective, and display the image on the display. Thereby, an operator can confirm the seal | sticker part 62 used as a test | inspection area | region in a display part.

  When the determination result output from the determination unit 43 indicates that there is a seal failure in the seal unit, the distribution mechanism 5 operates the arm 5a to remove the collection box from the regular line conveyor 80. 90, the article G determined to have a poor seal is sent. In other words, the distribution mechanism 5 has no seal failure in the seal portion 62, the bite of the contents into the seal portion 62, and the bending of the seal portion 62, and the article G determined as a good product, The article G is sent to the regular line conveyor 80. The distribution mechanism 5 also distributes the articles G even when the determination result output from the determination unit 43 indicates that there is a defect other than a seal failure.

  As described above, in the near-infrared inspection apparatus 1 of the present embodiment, the determination unit 43 determines that the article region 52 is in the article region 52 and the mask creation region M when the article region 52 is inclined with respect to the arrangement direction of the transmission image 50. Based on this, the area S in which the contents 61 are accommodated is set as the mask area MA. Thereby, in the near-infrared inspection apparatus 1, even when the article region 52 is inclined with respect to the arrangement direction of the transmission images 50 (the article G is inclined with respect to the conveyance direction of the conveyors 11 and 12). The mask area MA can be set in the area in which the contents 61 are accommodated without rotating the article area 52. Therefore, the near-infrared inspection apparatus 1 can determine whether there is a defect in the seal portion 62 based on the transmission image 50 and the mask area MA. Therefore, the near-infrared inspection apparatus 1 can satisfactorily inspect the seal portion 62 in the tilted article G.

  In the present embodiment, the determination unit 43 sets the mask area MA by moving the mask creation area M along one direction of the arrangement direction with respect to the article area 52. In this way, the mask creation area M is translated along one direction (column direction, row direction) in the arrangement direction with respect to the article area 52, and for example, a logical operation is performed in the article area 52 and the moved mask creation area M. By doing this, the mask area MA can be set satisfactorily. As a result, the near-infrared inspection apparatus 1 can satisfactorily inspect the seal portion 62.

  In the present embodiment, the determination unit 43 sets a mask creation area M including a first mask creation area M1 and second mask creation areas M2 and M3. The first mask creation area M1 is an area overlapping the article area 52. The second mask creation areas M2 and M3 include two first imaginary lines L1 and L2 that extend from the outer top portions C1 and C2 of one seal portion 62 to the end portions 50a and 50b of the transmission image 50, respectively. Two second imaginary lines L3 and L4 extending from the respective outer top portions C3 and C4 of the other seal portion 62 to the end portions 50a and 50b of the transmission image 50, and a first mask creating region M1. It is an area surrounded by. Here, when the second mask creation areas M2 and M3 are not set, as shown in FIG. 13, when the mask creation area MS is moved in the arrangement direction (row direction), the hatched portion in the figure is displayed. As shown, since the mask creation area MS deviates from the accommodation area for the contents 61, the mask area may not be set accurately.

  On the other hand, in the present embodiment, since the second mask creation areas M2 and M3 are set in the mask creation area M, even if the mask creation area M is moved in the arrangement direction, it is displaced from the accommodation area of the contents 61. Therefore, the mask area MA can be set more accurately.

  In the present embodiment, the first imaginary lines L1 and L2 and the second imaginary lines L3 and L4 are arranged from the tops C1, C2, C3, and C4 of the seal portion 62 to the end portions 50a and 50b of the transmission image 50, respectively. It extends in the direction (row direction, Y direction). When the first virtual lines L1 and L2 and the second virtual lines L3 and L4 are set in this way, the second mask creation areas M2 and M3 can be set satisfactorily. The first virtual lines L1 and L2 and the second virtual lines L3 and L4 can be created regardless of the shape of the outer edge of the seal portion 62. Therefore, the near-infrared inspection apparatus 1 can appropriately create the mask creation area M, and as a result, the mask area MA can be accurately set.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the second mask creation areas M2 and M3 of the mask creation area M are set based on the first virtual lines L1 and L2 and the second virtual lines L3 and L4 shown in FIG. The method for setting the second mask creation region is not limited to this. The second mask creation area may be set as follows.

  As shown in FIG. 14, the determination unit 43 linearly connects the top portion C1 and the top portion C2 from the portion corresponding to the top portion C1 outside the one seal portion 62 to the end portion 50a of the transmission image 50. The first imaginary line L11 extending in the same direction as the extending direction (in the example shown in FIG. 13, the extending direction of the outer edge of the seal portion 62) is created, and the outer top portion C3 of the other seal portion 62 is formed. From the corresponding part to the end 50a, a second virtual line L13 extending in the same direction as the extending direction of the virtual line that linearly connects the top part C3 and the top part C4 is created, and the first virtual line L11 and the second virtual line L11 A region surrounded by the virtual line L13 and the first mask creation region M1 is set as the second mask creation region.

  As shown in FIG. 14, the determination unit 43 linearly connects the top portion C1 and the top portion C2 from the portion corresponding to the top portion C2 outside the one seal portion 62 to the end portion 50b of the transmission image 50. The first imaginary line L12 extending in the same direction as the extending direction is created, and the top portion C3 and the top portion C4 are linearly formed from the portion corresponding to the top portion C4 on the outside of the other seal portion 62 to the end portion 50b. A second virtual line L14 extending in the same direction as the extending direction of the virtual line connecting to the second virtual line L14 is created, and a region surrounded by the first virtual line L12, the second virtual line L14, and the first mask creating region M1 is defined as the second virtual line L14. Set in the mask creation area. The determination unit 43 sets a mask creation area including the second mask creation area and the first mask creation area set as described above. When the first virtual lines L11 and L12 and the second virtual lines L13 and L14 are set in this way, the second mask creation area can be set satisfactorily. In addition, since the first virtual lines L11 and L12 and the second virtual lines L13 and L14 can be set quickly, the processing speed can be increased.

  In the embodiment described above, an example in which the article region 52 is inclined at an angle of 45 ° or less with respect to one direction of the arrangement direction of the transmission images 50 has been described. In this regard, when the article region 52 is inclined with respect to one direction of the arrangement direction of the transparent image 50 by more than 45 °, the determination unit 43 may rotate the transparent image 50 by 90 °. When the inclination angle of the article area 52 is larger than 45 °, there is a possibility that the vertical and horizontal directions of the article area 52 may be erroneously recognized, and thus the mask area MA may be set erroneously. Therefore, when the inclination angle of the article region 52 is larger than 45 °, the transmission image 50 is rotated by 90 ° to prevent erroneous recognition of the article region 52 in the vertical and horizontal directions, and the mask region MA can be set satisfactorily. Since the transmission image 50 is rotated by 90 °, the correspondence relationship between the rotated pixel positions can be accurately set.

  In the above embodiment, the packaging material 60 having the seal portion 62 is described as an example of the article G to be inspected. The packaging material may be a so-called three-way seal in which a seal portion is formed along the three sides of the outer frame of the packaging material, or a so-called four-side seal in which a seal portion is formed along the four sides of the outer frame. It may be a seal. Moreover, you may have another shape.

  In the embodiment described above, the light detection unit 3 includes the near infrared line sensor 14, but the light detection unit may include a near infrared area sensor instead of the near infrared line sensor 14. In addition, the light detection unit may include a filter that allows near infrared light to pass through and blocks visible light. Thereby, when the near-infrared optical path from the light irradiation unit to the light detection unit is exposed to the ambient atmosphere, visible light enters the near-infrared line sensor or near-infrared area sensor from the ambient atmosphere, and the visible light is It is possible to prevent disturbance light.

  In the above-described embodiment, near-infrared light has been described as an example of light emitted from the light irradiation unit. However, the light may be visible light, near-infrared light, X-rays, ultraviolet light, terahertz waves, or the like. The light may be appropriately set according to the article G to be inspected.

DESCRIPTION OF SYMBOLS 1 ... Near-infrared inspection apparatus (inspection apparatus), 2 ... Light irradiation part, 41 ... Image generation part, 43 ... Judgment part, 50 ... Transmission image, 52 ... Article area | region, 60 ... Packaging material, 61 ... Contents, 62 ... Seal part, L1, L2 ... first imaginary line, L3, L4 ... second imaginary line, M ... mask creation area, MA ... mask area, M1 ... first mask creation area, M2 ... second mask creation area, S ... region.

Claims (9)

A light irradiating unit configured to irradiate light on an article whose contents are wrapped in a packaging material; an image generating unit configured to generate a transmission image including the article based on the light transmitted through the article; and the image generating unit. A determination unit that determines the presence or absence of a defect in the sealing portion of the packaging material based on the generated transmission image,
The determination unit
When the article region corresponding to the article is inclined with respect to the arrangement direction which is the column direction and the row direction of the pixels in the transmission image, it is an area for setting a mask region without rotating the article region. wherein to create the mask creation area including the article area, said mask creation area is moved along one of the arrangement directions relative to the article area Te,
The logical operation of the mask creation area after the movement and the article area, set the region where the content is accommodated in the mask area, the defect in the sealing portion on the basis of the said transparent image the mask region Inspection device that determines the presence or absence. The inspection apparatus according to claim 1, wherein the determination unit moves the mask creation region in a direction from the seal unit toward the article region when moving the mask creation region along one of the arrangement directions with respect to the article region. . In the packaging material, a pair of the seal portions are formed at positions facing each other,
The mask creation area is
A first mask creation region overlapping the article region;
Two first imaginary lines extending from each of the outer tops of one of the seal portions to the end of the transmission image, and from each of the outer tops of the other sealing portion to the end of the transmission image 2 and a second imaginary line which extends to said the first mask creation area, and a second mask creation area surrounded by, consisting inspection apparatus according to claim 1 or 2, wherein.   The inspection apparatus according to claim 3, wherein each of the first imaginary line and the second imaginary line extends in the same direction as an extending direction of an imaginary line that linearly connects the top portions of the seal portion. .   4. The inspection apparatus according to claim 3, wherein each of the first virtual line and the second virtual line extends in the arrangement direction from each of the top portions of the seal portion to the end portion of the transmission image. The inspection apparatus according to claim 5, wherein a direction in which the mask creation region moves along the arrangement direction intersects with a direction in which the first imaginary line and the second imaginary line extend. The article has a substantially rectangular shape,
When the number of the seal portions is 1 or more and 4 or less, the determination unit moves the mask creation region by the number of the seal portions, and moves the article region and the plurality of masks moved by the number of the seal portions. the logical operation of the creation area, sets the mask regions, the inspection apparatus of any one of claims 1-5. The determination unit is configured when the inclination angle with respect to one direction of the array direction of the article area is greater than 45 °, the transmission image rotating 90 °, the inspection apparatus of any one of claims 1-7. The determination unit, the transmission image and to be displayed on the display unit overlapping the mask region, the inspection apparatus of any one of claims 1-8.

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