JP2008051673A - Cylindrical body inspecting device and cylindrical body inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylindrical body inspecting device and a cylindrical body inspection method, capable of suppressing detection of slight defects or misdetection of defects. <P>SOLUTION: A control part 3 of this cylindrical body inspecting device 1 detects a defect by acquiring an inspection image of one circuit or more of a roll 6 from an imaging part 2. The control part 3 displays a defect image of a detected defect detected from among a masked domain, set beforehand; and when reset is carried out after removing from a detection result, sets a masked domain on the inspection image over the entire length of detection width position. When the number of defects detected in the masked domain does not exceed a reset number, the control part 3 will not display the defect image of the masked domain; when the number of defects detected in the masked domain exceeds the reset number, the control part 3 displays all the defect images of the masked domain; when reset is carried out after removing detected defects to the number exceeding the reset number from the detection result, the control part 3 updates the reset number. The control part 3 hold the mask width position and the resetting number as mask resetting information in a storage part 13. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cylindrical body inspection apparatus and a cylindrical body inspection method for inspecting the surface of a cylindrical body. Specifically, the present invention relates to a cylindrical body inspection apparatus and a cylindrical body inspection method for inspecting the surface of a cylindrical body such as a roll used in a printing process or a bonding process in a printed material production machine.

  2. Description of the Related Art Conventionally, in a printed product production machine, a cylindrical plain roll or a rubber roll is provided in a printing process, a bonding process, or a printed material transport path. Since roll contamination and foreign matter adhesion cause product defects, it is necessary to inspect the surface of the roll.

  Further, in the inspection of the inspection body supported and conveyed by the cylindrical body, there has been proposed a surface inspection apparatus for preventing erroneous inspection by removing foreign matters on the surface of the cylindrical body using a blade (for example, [Patent Reference 1]).

  In addition, regarding inspection of cylinders used for gravure printing, etc., the cylinder surface is imaged using a line camera, the number of impositions of the pattern in the captured image is counted and the impositions are compared, and defects such as pinholes and scratches are detected. There has been proposed a plate inspection apparatus that detects the above (for example, see [Patent Document 2]).

Japanese Patent No. 3442199 JP 2004-170394 A

  However, the conventional inspection apparatus has a problem that a minor defect that does not need to be detected may be detected as a defect or a defect may be erroneously detected. In addition, when the same inspection object is inspected a plurality of times, there is a problem in that detection of minor defects and erroneous detection are repeated at each inspection. For example, there is a problem that foreign matter adhesion and contamination that do not cause product defects are always detected as defects depending on the inspection conditions.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a cylindrical body inspection apparatus and a cylindrical body inspection method capable of suppressing detection of minor defects and erroneous detection of defects. And

  In order to achieve the above-described object, a first invention is a cylindrical body inspection apparatus that inspects the cylindrical body based on an image obtained by imaging a cylindrical body, and an imaging unit that acquires an inspection image of the cylindrical body; A defect detection means for detecting a defect based on the inspection image; a reset means for removing the defect detected by the defect detection means from the inspection result and resetting; and a total detection width position of the reset defect. A mask means for setting a mask area in the inspection image and excluding it from the inspection area, and a non-mask area defect display means for displaying a defect detected in the inspection area other than the mask area. This is a cylindrical inspection apparatus.

  The cylindrical body is a cylindrical object to be inspected. The cylindrical body is, for example, a printing plate used for rotary printing such as a printing process, a bonding process, and a plain roll, a rubber roll, and gravure printing provided in a printing material conveying machine.

  The cylindrical body inspection device acquires an inspection image of the cylindrical body by the imaging unit, detects defects based on the inspection image, excludes minor defects or erroneously detected defects from the inspection results, resets them, and resets the defects. A mask area is set in the inspection image over the entire length of the detection width position, and defects detected in the inspection area other than the mask area are displayed.

  In the cylindrical body inspection apparatus according to the first aspect of the present invention, minor defects or erroneously detected defects are excluded from the inspection result and reset, and a mask region is added to the inspection image over the entire length of the detection width position. Therefore, it is possible to prevent unnecessary defects from being continuously detected at the width position in the next and subsequent inspections.

  In addition, the cylindrical body inspection apparatus holds a reset number indicating the number of reset defects for each mask region, counts the number of defects detected in the mask region, and the counted number of defects exceeds the reset number. It is desirable to display defects in the mask area.

As a result, when the cylindrical body inspection apparatus exceeds the number of resets even in the mask area, all the defect images in the mask area can be displayed and reset processing can be performed again. Even if this occurs, detection omission can be prevented.
Note that a warning process by voice or display may be performed before displaying the defect image in the mask area, and the defect image may be displayed after an instruction from the operator (operator).

  In addition, the cylindrical body inspection apparatus rotates the cylindrical body to obtain an inspection image including an overlapping area exceeding one round of the cylindrical body, and regarding the number of defects detected in the overlapping area, two places are equivalent to one place. You may make it count.

  As described above, the number of detected defects in the overlapping region is counted as one portion at two locations, so that even if an inspection image is input asynchronously with the rotation of the cylindrical body, a reset process (inspection result) (Exclusion processing from the inspection area) and mask processing (exclusion processing from the inspection area) can be appropriately performed.

  The cylindrical body inspection apparatus may cancel the reset process and the mask process. When resetting a detection defect, the cylindrical body inspection device increases the mask area setting or reset count, and conversely, when canceling the detection defect resetting, the mask area setting cancellation or reset count is increased. Decrease.

  A second invention is a cylindrical body inspection method for inspecting the cylindrical body based on an image obtained by imaging the cylindrical body, the imaging step for acquiring the inspection image of the cylindrical body, and a defect based on the inspection image A defect detection step for detecting the defect, a reset step for removing the defect detected by the defect detection step from the inspection result and resetting, and a mask on the inspection image over the entire length of the detection width position of the reset defect. A cylindrical body inspection method comprising: a mask step for setting an area and excluding it from the inspection area; and a defect display step outside the mask area for displaying a defect detected in the inspection area other than the mask area. is there.

  The second invention relates to a cylindrical body inspection method for inspecting the cylindrical body based on an image obtained by imaging the cylindrical body.

  According to the present invention, it is possible to provide a cylindrical body inspection apparatus and a cylindrical body inspection method that can suppress detection of minor defects and erroneous detection of defects.

  Hereinafter, preferred embodiments of a cylindrical body inspection apparatus according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, the same reference numerals are given to components having substantially the same functional configuration, and redundant description will be omitted.

(1. Configuration of cylindrical body inspection apparatus 1)
Initially, the structure of the cylindrical body inspection apparatus 1 is demonstrated, referring FIG.
FIG. 1 is a configuration diagram of a cylindrical body inspection apparatus 1.

  The cylindrical body inspection apparatus 1 includes an imaging unit 2, a control unit 3, a moving unit 4, a support unit 5, a rotation unit 7, and a support unit 8. The configuration of the cylindrical body inspection apparatus 1 in FIG. 1 is an example, and various configurations can be adopted.

The cylindrical body inspection apparatus 1 is an apparatus that inspects the roll 6.
The roll 6 is rotatably attached to the support portion 8 via the rotation portion 7. The roll 6 is a cylindrical plain roll or rubber roll provided in a printing process, a bonding process, and a printed material conveyance path in the printed material production machine.

The imaging unit 2 is provided on the support unit 5 via the moving unit 4. The imaging unit 2 can move in the width direction of the roll 6 along the moving unit 4.
The imaging unit 2 is a device that acquires an image of the roll 6. The imaging unit 2 is, for example, a camera including an optical sensor such as a CCD (Charge Coupled Device) in which light receiving elements (pixels) are arranged, a drive circuit, an imaging optical system, and the like. A color line sensor camera can be used as the imaging unit 2. Further, at least one imaging unit 2 may be moved along the moving unit 4 to acquire the image of the roll 6, or a plurality of imaging units 2 may be fixed and the image of the entire roll 6 may be acquired. May be obtained.

  The control unit 3 is a device that performs operation control, arithmetic processing, and image processing of each unit of the cylindrical body inspection device 1. The control unit 3 is configured by connecting a CPU 11, a memory 12, a storage unit 13, a display unit 14, an input unit 15, an output unit 16, and a communication unit 17 via a system bus 18.

The control unit 3 controls the imaging timing of the imaging unit 2 and the operations of the moving unit 4 and the rotating unit 7. The control unit 3 performs image processing on the image of the roll 6 and performs defect detection, reset processing (exclusion processing from inspection results), and mask processing (exclusion processing from inspection regions).
The control unit 3 acquires the image of the roll 6 by the imaging unit 2, determines pass / fail based on the image of the roll 6 by the CPU 11, and displays the determination result on the display unit 14. The control unit 3 loads a program (application program, OS program, etc.) stored in the storage unit 13, ROM, or recording medium into the RAM of the memory 12, and executes various processes under the control of the CPU 11.

  A CPU 11 (Central Processing Unit) is a device that performs arithmetic processing (four arithmetic operations, comparison operations, etc.) and operation control of hardware and software.

  The memory 12 is a memory such as a RAM and a ROM. A RAM (Random Access Memory) stores a ROM (Read Only Memory), an OS (Operating System) program read from the storage unit 13, an application program, and the like. The RAM functions as a main memory and work area for the CPU 11.

The storage unit 13 is a device that stores various data, and is, for example, a hard disk. The storage unit 13 stores a program executed by the CPU 11, data necessary for program execution, an OS, various databases, and the like. The storage unit 13 holds mask reset information 22.
The control unit 3 performs defect detection processing based on the image of the roll 6. The mask reset information 22 will be described later.

  The display unit 14 is a display device, such as a CRT monitor or a liquid crystal panel. The display unit 14 includes a logic circuit (such as a video adapter) for realizing the video function of the computer.

The input unit 15 is an input device for various data, such as a keyboard and a mouse. The output unit 16 is an output device for various data, and is, for example, a printer. Drive devices that perform data input / output with various media can also be used as the input unit 15 and the output unit 16.
The communication unit 17 is a communication control device that connects and communicates with an external device such as the traveling unit 20.
The system bus 18 is a path that mediates transmission / reception of control signals, data signals, and the like between the devices.

(2. Mask reset information 22)
Next, the mask reset information 22 will be described with reference to FIG.
FIG. 2 is a diagram illustrating an aspect of the mask reset information 22.
The mask reset information 22 has fields of a mask width position 31 and a reset number 32.
The mask width position 31 stores the width position of the area where mask processing (exclusion processing from the inspection area) is performed. The mask width position 31 is, for example, “X1”.
The reset number 32 stores the number of detected defects for which reset processing (exclusion processing from inspection results) has been performed. The reset number 32 is “1”, for example.

(3. Inspection image 41)
Next, the inspection image 41 will be described with reference to FIG.
FIG. 3 is a diagram showing an inspection image 41 obtained by imaging the roll 6 to be inspected.

The inspection image 41 is an image obtained by imaging a portion of the roll 6 that is slightly stronger (the non-wrap region 43, the wrap region 44, and the wrap region 45).
The inspection area 42 indicates the width area of the roll 6 to be inspected.
The non-wrap region 43 + wrap region 44 or the non-wrap region 43 + wrap region 45 is a region corresponding to one turn of the roll 6.
The wrap region 44 and the wrap region 45 are overlapping regions. The wrap region 44 and the wrap region 45 are set on both sides of the non-wrap region 43. In the wrap region 44 and the wrap region 45, substantially the same image is acquired.

  The mask area 51, the mask area 52, and the mask area 53 are areas that are excluded from the inspection area. The mask area 51, the mask area 52, and the mask area 53 are areas (Y-direction band areas) corresponding to the entire length of the mask width position. The mask width position of the mask area 51 is “X1”, the mask width position of the mask area 52 is “X2”, and the mask width position of the mask area 53 is “X3”.

The detection defect 61, the detection defect 62, the detection defect 63, and the detection defect 66 are defects detected in the non-wrap region 43, respectively. The detection defect 64 and the detection defect 65 are defects detected in the wrap region 44 and the wrap region 45, respectively.
The defect image 71 to the defect image 76 are images showing the detection defect 61 to the detection defect 66. In addition, a defect image is not displayed about the detected defect by which the reset process (exclusion process from an inspection result) was carried out.

(4. Operation of cylindrical body inspection apparatus 1)
Next, the operation of the cylindrical body inspection apparatus 1 will be described with reference to FIGS.

(4-1. Overall operation of cylindrical body inspection apparatus 1)
FIG. 4 is a flowchart showing the overall operation of the cylindrical body inspection apparatus 1.

The roll 6 to be inspected is attached to the rotating part 7 of the cylindrical body inspection apparatus 1 (step 101).
The control unit 3 rotates the roll 6 with the rotation unit 7 and images the roll 6 with the imaging unit 2 (step 102). The control unit 3 acquires the inspection image 41 of the roll 6 that is slightly stronger than the roll 6 (the non-wrap region 43, the wrap region 44, and the wrap region 45). Note that the control unit 3 acquires the inspection image 41 asynchronously with the rotation of the roll 6. Therefore, the non-wrap area 43, the wrap area 44, and the wrap area 45 in the inspection image 41 do not directly correspond to the predetermined area of the roll 6.

  The controller 3 detects a defect on the surface of the roll 6 based on the inspection image 41 (step 103).

The control unit 3 reads the mask reset information 22 from the storage unit 5. The control unit 3 refers to the mask width position 31 of the mask reset information 22 and determines whether or not the detected defect is a defect detected from the mask area (step 104).
When the detected defect is a defect detected from the set mask area (YES in Step 104), the control unit 3 counts the number of detected defects for each mask area (for each mask width position) (Step 105).

  In addition, regarding the number of detected defects in the wrap region 44 and the wrap region 45, the control unit 3 counts as one place at two places. That is, (the number of detected defects) = (the number of detected defects in the non-wrap region 43) + (the number of detected defects in the wrap region 44 or the wrap region 45) / 2.

The control unit 3 reads the mask reset information 22 from the storage unit 5 and compares the number of detected defects with the number of resets 32 for each mask region (for each mask width position) (step 106).
When the number of detected defects is 32 or less (NO in step 106), the control unit 3 does not display an image of detected defects for the mask area.
When the number of detected defects is larger than the reset number 32 (YES in Step 106) or when the detected defect is not a defect detected from the set mask area (NO in Step 104), the control unit 3 together with the inspection image 41 The image is displayed on the display unit 14 (step 107). The controller 3 performs a reset process (step 108). The reset process will be described later with reference to FIG.

  The control unit 3 stops the inspection when the processes of Step 104 to Step 108 are completed for all detected defects. When the next inspection of the roll 6 is started, the control unit 3 repeats the processing from step 101.

(4-2. Reset processing)
FIG. 5 is a flowchart showing reset processing (step 108 in FIG. 4) of the cylindrical body inspection apparatus 1.

The operator (operator) of the cylindrical body inspection apparatus 1 confirms the image of the detected defect and determines whether to treat the detected defect as a defect as it is or to exclude it from the detection result and reset (step 201).
When the detection defect is excluded from the detection result and reset (YES in step 202), the control unit 3 excludes the entire length of the detection width position of the detection defect from the inspection area as a mask area (step 203).

When the mask area is not originally set, the control unit 3 adds the mask width position 31 to set the reset number 32 to “1”, and holds the mask reset information 22 in the storage unit 5. (Step 204).
When the mask area has been set, the control unit 3 updates the number of resets 32 by incrementing it, and holds the mask reset information 22 in the storage unit 5 (step 204).

(4-3. Inspection Image 41a)
FIG. 6 is a diagram showing the inspection image 41a and the mask reset information 22a.
The control unit 3 acquires the inspection image 41a and detects the detection defect 61 (step 103).
When the detected defect 61 is not a defect detected from the set mask area (NO in step 104), the control unit 3 displays the defect image 71 on the display unit 14 (step 107).
When removing the detected defect 61 from the inspection result and resetting it (YES in Step 202), the control unit 3 sets the mask region 51 at the mask width position “X1” (Step 203). The controller 3 updates the mask reset information 22a by adding the mask width position 31 “X1” and the reset number 32 “1” (step 204).

(4-4. Inspection Image 41b)
FIG. 7 is a diagram showing the inspection image 41b and the mask reset information 22b.
The control unit 3 acquires the inspection image 41b and detects the detection defect 61 and the detection defect 62 in the set mask area 51 (YES in Step 103 and Step 104).
Since the number of detected defects (“2”) exceeds the number of resets 32 (“1”) (YES in Step 106), the control unit 3 displays both the defect image 71 and the defect image 72 on the display unit 14 (Step 107). ).

  When both the detection defect 61 and the detection defect 62 are excluded from the inspection result and are reset (YES in Step 202), the control unit 3 sets the reset number 32 in the mask region 51 (mask width position 31 “X1”) to “1”. The mask reset information 22b is updated from "2" to "2" (step 204).

(4-5. Inspection Image 41c)
FIG. 8 is a diagram showing the inspection image 41c and the mask reset information 22c.
The control unit 3 acquires the inspection image 41c and detects the detection defect 63 in the set mask area 52 (YES in Step 103 and Step 104).
The control unit 3 does not display the defect image 73 on the display unit 14 because the number of detected defects (“1”) does not exceed the reset number 32 (“1”) (NO in step 106).

(4-6. Inspection Image 41d)
FIG. 9 is a diagram showing the inspection image 41d and the mask reset information 22d.
The control unit 3 acquires the inspection image 41d, and detects the detection defect 64, the detection defect 65, and the detection defect 65 in the set mask region 53 (step 103).
Since the detection defect 64 and the detection defect 65 are defects detected in the wrap region 44 and the wrap region 45, the detection defect is one detection defect at two locations. Since the number of detected defects (“2” = 1 + 2/2) does not exceed the reset number 32 (“2”) (NO in Step 106), the control unit 3 displays the defect image 74, the defect image 75, and the defect image 76. Not displayed on part 14.

(4-7.)
Through the above process, the cylindrical body inspection apparatus 1 acquires an inspection image 41 for a little over one turn of the roll 6 by the imaging unit 2 and detects a defect compared with the reference image 21. When the cylindrical body inspection apparatus 1 displays an image of a defect detected in a region other than the set mask region and resets it by removing it from the detection result, the mask region is added to the inspection image over the entire length of the detection width position. Set. When the number of detected defects detected in the set mask area does not exceed the reset number, the cylindrical body inspection apparatus 1 does not display a defect image in the mask area and does not treat it as a defect. When the number of detected defects detected in the set mask area exceeds the reset number, the cylindrical body inspection apparatus 1 displays all defect images in the mask area and excludes the detected defects exceeding the reset number from the inspection result. When resetting, the number of resets is updated.

  The number of detected defects is (number of detected defects) = (number of detected defects in the non-wrap region) + (number of detected defects in the wrap region) / 2. In addition, the cylindrical body inspection apparatus 1 stores the mask width position 31 and the reset number 32 in the storage unit 13 as mask reset information 22 in association with each other.

(5. Effects and modifications)
As described above in detail, according to the embodiment of the present invention, the cylindrical body inspection apparatus resets a detection defect by removing a minor defect or a falsely detected defect from the inspection result. Since the mask region is set in the inspection image over the entire length of the width position, it is possible to prevent the useless defect from being continuously detected at the width position in the subsequent inspection.

  In addition, when the cylindrical body inspection apparatus exceeds the number of resets even in the mask area, it can display all defect images in the mask area and perform reset processing again, so that a new defect exists in the mask area. Even if it occurs, detection omission can be prevented.

  In addition, regarding the number of detected defects in the lap region, by counting as one place at two places, even when the inspection image is input asynchronously with the rotation of the cylindrical body, the reset process (from the inspection result) Exclusion processing) and mask processing (exclusion processing from the inspection area) can be performed appropriately.

  In the above-described embodiment, when the number of detected defects exceeds the reset number of the mask area, it has been described that all the defect images of the detected defects in the mask area are displayed. The defect image may be displayed after waiting for an instruction from the operator (operator).

  In the above-described embodiment, the case where the detection defect is excluded from the inspection result and reset is described. Conversely, the reset of the detection defect can be canceled. When resetting a detection defect, the cylindrical body inspection apparatus increases the setting or reset number of the mask area. On the other hand, when canceling the detection defect resetting, the mask area setting is canceled or the reset number is decreased. Let

FIG. 10 is a configuration diagram of a cylindrical body inspection apparatus 81 according to another embodiment.
In the above-described embodiment, the cylindrical body inspection apparatus has been described as inspecting a roll such as a plain roll provided in the printed material production machine. However, the cylindrical body inspection apparatus can also be applied to inspection of a printing plate such as a cylinder used for gravure printing. .

The cylindrical body inspection device 81 is a device that inspects the cylinder 82.
The cylinder 82 is a printing plate used for gravure printing or the like. The cylinder 82 has a recessed portion 83 on the surface. The recessed portion 83 is a recessed portion (cell) corresponding to an image of gravure printing. Gravure printing is carried out by filling the recessed portion 83 with ink and transferring the ink to paper or a resin film. A single cylinder 83 may be provided with a plurality of the same recessed portions 9 to provide multiple faces.

The storage unit 13 holds the reference image 84 together with the mask reset information 22. The reference image 84 is an image of the cylinder 82 that serves as an inspection reference, and includes an image of the recessed portion 83.
The control unit 3 of the cylindrical body inspection apparatus 81 reads the reference image 84 from the storage unit 5 and compares the reference image 84 with the inspection image obtained by imaging the cylinder 82 to detect a defect.
Regarding other processes such as a reset process and a mask process, the cylindrical body inspection apparatus 81 performs the same process as the cylindrical body inspection apparatus 1 of the above-described embodiment.

FIG. 11 is a configuration diagram of a printed matter production machine 91 according to another embodiment.
In the above-described embodiment, it has been described that the inspection target cylindrical body is attached to the cylindrical body inspection apparatus, but the inspection may be performed with the cylindrical body mounted on a printed material production machine or the like. That is, the surface of a cylindrical body such as a roll used in the printing process or the laminating process may be directly inspected in the print production machine.

The printed matter production machine 91 is a device that produces printed matter. The sheet 95 unwound from the unwinding roll 94 is wound around the winding roll 96 through the rolls 92-1 to 92-5. While the paper 95 travels from the unwinding roll 94 to the take-up roll 96, a printing process, a bonding process, and the like are performed on the paper 95.
The printed matter production machine 91 is provided with an imaging unit 93-1 to an imaging unit 93-5 for each of the rolls 92-1 to 92-5. The imaging units 93-1 to 93-5 perform inspection by capturing images of the surfaces of the rolls 92-1 to 92-5, respectively. Regarding other processes such as the reset process and the mask process, the printed matter production machine 91 performs the same process as the cylindrical body inspection apparatus 1 of the above-described embodiment.

  In this way, by directly inspecting the surface of a cylindrical body such as a roll used in a printing process or a bonding process in a printed material production machine, it is possible to inspect quickly and in real time in-line. In addition, it is possible to reduce the work burden related to the removal and attachment of a cylindrical body such as a roll during inspection.

  The preferred embodiments of the cylindrical body inspection apparatus and the cylindrical body inspection method according to the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

Configuration diagram of cylindrical body inspection apparatus 1 The figure which shows the one aspect | mode of the mask reset information 22 The figure which shows the test | inspection image 41 which imaged the roll 6 to be examined. Flowchart showing overall operation of cylindrical body inspection apparatus 1 The flowchart which shows the reset process (step 108 of FIG. 4) of the cylindrical body inspection apparatus 1. The figure which shows the test | inspection image 41a and the mask reset information 22a The figure which shows the test | inspection image 41b and the mask reset information 22b The figure which shows the test | inspection image 41c and the mask reset information 22c The figure which shows inspection image 41d and mask reset information 22d Configuration diagram of cylindrical body inspection device 81 Block diagram of printed product production machine 91

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ......... Cylindrical body inspection apparatus 2 ......... Imaging part 3 ......... Control part 4 ......... Moving part 6 ......... Roll 7 ......... Rotating part 11 ......... CPU
12 ......... Memory 13 ......... Storage unit 14 ......... Display unit 22, 22a, 22b, 22c, 22d ......... Mask reset information 31 ......... Mask width position 32 ......... Number of resets 41, 41a, 41b , 41c, 41d... Inspection image 42... Inspection region 43... Non-wrapping region 44 and 45... Wrapping region 51 to 53. …… Defect image 81 ………… Cylinder inspection device 82 ……… Cylinder 83 ……… Concave portion 84 ……… Reference image 91 ……… Print production machine 92 ……… Roll 93 ……… Imaging unit

Claims (12)

A cylindrical body inspection apparatus that inspects the cylindrical body based on an image of the cylindrical body,
An imaging unit for obtaining an inspection image of the cylindrical body;
A defect detection means for detecting a defect based on the inspection image;
Resetting means for excluding defects detected by the defect detecting means from the inspection results and resetting;
Mask means for setting a mask area in the inspection image and excluding it from the inspection area over the entire length of the detected width of the reset defect;
Outside-mask area defect display means for displaying defects detected in the inspection area other than the mask area;
A cylindrical body inspection apparatus comprising: Reset number holding means for holding a reset number indicating the number of reset defects for each mask region;
Counting means for counting the number of defects detected in the mask region;
If the number of defects counted by the counting means exceeds the reset number, the defect display means in the mask area for displaying the defects in the mask area;
The cylindrical body inspection device according to claim 1, comprising: Reset number holding means for holding a reset number indicating the number of reset defects for each mask region;
Counting means for counting the number of defects detected in the mask region;
Warning means for giving a warning when the number of defects counted by the counting means exceeds the reset number;
The cylindrical body inspection device according to claim 1, comprising: Comprising a rotating part for rotating the cylindrical body;
The imaging unit obtains an inspection image including an overlapping region exceeding one round of the cylindrical body,
4. The cylindrical body inspection apparatus according to claim 2, wherein the counting unit counts the number of defects detected in the overlapping region as one portion at two locations. 5. Reset release means for releasing reset by the reset means;
Mask releasing means for releasing the setting of the mask area by the mask means;
The cylindrical body inspection apparatus according to any one of claims 1 to 4, further comprising:   6. The cylindrical body inspection apparatus according to claim 1, wherein the cylindrical body is a cylindrical roll or a printing plate. A cylindrical body inspection method for inspecting the cylindrical body based on an image of the cylindrical body,
An imaging step of acquiring an inspection image of the cylindrical body;
A defect detection step of detecting a defect based on the inspection image;
A reset step of excluding defects detected by the defect detection step from the inspection result and resetting;
A mask step of setting a mask region in the inspection image and excluding it from the inspection region over the entire length of the detected width of the reset defect;
An off-mask area defect display step for displaying defects detected in the inspection area other than the mask area;
The cylindrical body inspection method characterized by comprising. A reset number holding step for holding a reset number indicating the number of reset defects for each mask area;
A counting step of counting the number of defects detected in the mask region;
If the number of defects counted in the counting step exceeds the number of resets, a defect display step in the mask area that displays defects in the mask area;
The cylindrical body inspection method according to claim 7, comprising: A reset number holding step for holding a reset number indicating the number of reset defects for each mask area;
A counting step of counting the number of defects detected in the mask region;
A warning step for giving a warning when the number of defects counted in the counting step exceeds the reset number;
The cylindrical body inspection method according to claim 7, comprising: Comprising a rotating step of rotating the cylindrical body;
The imaging step acquires an inspection image including an overlapping region exceeding one round of the cylindrical body,
10. The cylindrical body inspection method according to claim 8, wherein in the counting step, the number of defects detected in the overlapping region is counted as one portion at two locations. A reset release step for releasing the reset by the reset step;
A mask release step for canceling the setting of the mask area by the mask step;
The cylindrical body inspection method according to any one of claims 7 to 10, characterized by comprising:   The cylindrical body inspection method according to any one of claims 7 to 11, wherein the cylindrical body is a cylindrical roll or a printing plate.

Images