JP5145837B2 - Random inspection device - Google Patents

Description

  The present invention relates to an irregularity inspection apparatus in a bookbinding machine collating operation.

 In general, the collating process in the bookbinding apparatus is composed of a signature storing means for stacking and storing signatures, and a taking out and dropping means for taking out one copy of the signature from the signature collecting means and dropping it onto the transport line. The collating pieces are arranged in a plurality of directions in the order of pages, and the signatures dropped from the collating pieces are transported and stacked in the order of pages as they are transported.

In each signature storing means in the collating process, signatures must be properly stored in a predetermined arrangement order such as page order.
However, the storing means stores signatures that are different from the arrangement order, or signatures that are reversed in the top and bottom directions, resulting in irregularities after bookbinding.
Therefore, conventionally, in order to prevent the occurrence of the above-mentioned disorder, a disorder inspection device for inspecting whether or not an appropriate signature is properly placed in the storage means has been provided for each collating piece.

  The irregularity inspection apparatus acquires an image of the signature (hereinafter referred to as “image to be inspected”) by an imaging means such as a camera while the signatures stacked on the storage means are taken out and dropped on the transport line. The device has a function of comparing an image of a proper signature originally placed on the storage means (hereinafter referred to as “reference image”) with the image to be inspected, and warning if they do not match. .

In addition, when the existence of the disorder was found out later, the inspected image acquired by the imaging means was stored and stored in the image memory in order to investigate the cause of the disorder ( Patent Document 1, paragraph (0017)).
JP 2006-103188 A

  When investigating the cause of disorder, the reliability corresponding to the rank of pass / fail judgment was not displayed, so depending on the method of checking, checking all of the images to be inspected required a lot of work. It was difficult to identify the signature that caused the disorder in a short time.

  An object of the present invention is to provide a tamper inspection device that reduces the burden of the work of investigating the cause of the occurrence of tampering when the presence of tampering is found.

  As a display screen that displays the results of random inspection, depending on the category in which the correlation value between the image to be inspected and the reference image belongs to the color-coded classification of the correlation value for each predetermined range, the determination result is a color corresponding to the category. A screen that is colored and displayed in step 1, a predetermined number of signatures to be inspected as an inspection unit as a display unit, and a screen in which the inspection unit is colored in a color corresponding to the lowest determination result included in the one inspection unit. In addition to the display screen.

  Since the determination result based on the correlation value between the image to be inspected and the reference image is displayed in different colors according to the determination rank, at a later date, when investigating the cause of the disorder that has been found, check from the image to be inspected with a low determination level. As a result, it is possible to reduce the burden of the cause investigation work.

  FIG. 1 is a schematic diagram illustrating an example in which a random inspection apparatus is disposed in a collation process of a bookbinding apparatus.

The operation of the collation process will be described with reference to FIG.
In FIG. 1, 10 is a collating machine, 11 is a signature storing means, 12 is a signature loading table, 13 is a rotating shaft, 14 is fixed to the rotating shaft, and a drum having a signature pulling claw, 15 A starter that emits a start signal in synchronization with the nail of the drum 14, 16 a drive unit, 17 a transport line, 20-1 to 20-n a piece irregularity checker, 21 a CCD camera that captures a signature, and 22 a piece It is a control unit.
The collating machine 10 includes a rotating shaft 13 extending in the horizontal direction, a drive unit 16 that rotationally drives the rotating shaft 13, a plurality of signature storage means 11 disposed on the signature table 12, and the signature storage. Corresponding to the means 11, it is composed of a plurality of drums 14 arranged on the rotary shaft 13 and a conveying line 17. When the rotary shaft 13 is driven to rotate, it is arranged on the signature table 12. The signatures are pulled out one by one by the claws of the drum 14 from the signature storage means 11 and dropped onto the transport line 17.
The dropped signatures are sequentially stacked as they are conveyed, and all of the plurality of signatures are stacked in page order at the end of the collating machine 10.
The piece random inspection devices 20-1 to 20-n are composed of a CCD camera 21 and a piece control unit 22. When the piece control unit 22 detects the start signal from the starter 15 via the network, The camera 21 is controlled to take an image of the extracted signature, detect and determine the degree of coincidence (correlation) between the captured image to be inspected and the reference image, operation information including the determination result information, and the image to be inspected The information is output to the main randomness checker 30 via the network.

FIG. 2-1 is a block diagram showing an example of a block check system 21-1 to 21-n and a main block check unit 30 as a block check system in the collating process. 2-3 are schematic configuration diagrams of the piece control means and schematic configuration diagrams of the main control means.
In FIG. 2A, the piece irregularity inspection apparatus 20-1 is arranged corresponding to each drum 14, and each piece irregularity inspection apparatus 20-1 to 20-n includes a network and an I / O terminal 30E. To the main random controller 30.
Each of the piece random inspection devices 20-1 to 20-n includes a CCD camera 21 and a piece control unit 22. The piece control unit 22 includes a storage unit 22A, a counter 22C, a determination unit for both the images, and a CCD. It is composed of camera control means, operation information creation means, data input / output means, and piece control means 22B responsible for control of each means.
In addition, the main randomness inspection device 30 includes storage means 30A, display means 30B, input operation means 30C for storing the inspected image data and operation information data transmitted from the piece randomness inspection devices 20-1 to 20-n, The main control means 30D controls each means.

FIG. 3 is a diagram illustrating an example of items stored as operation information.
In FIG. 3, items other than items specified at the time of inspection, such as a colored determination result, an inspection counter value, inspection target image specifying information, and the like, for example, items such as inspection date and time, collation piece NO, etc. are input operation units 30C of the main randomness inspection device 30. Are entered in advance and stored in the corresponding piece disorder checkers 20-1 to 20-n.

FIG. 4 is a diagram showing a classification example of correlation values of the inspected images in the piece irregularity inspection devices 20-1 to 20-n in the randomness inspection system of the present invention.
In the figure, the vertical axis indicates the correlation value, the line D indicates the pass / fail determination line, and when the correlation value is 0.75 or less, the determination is rejected.
Lines A to C indicate complete determination lines, and the determination lines indicate cases where the correlation values are 0.90, 0.925, and 0.875.
The correlation value range that is classified as the complete determination line or higher is determined based on the determination that there is generally no possibility that the determination result will be covered. This is a complete determination range determined as a complete determination within a correlation value range that can be excluded from the investigation target image.
Also, the correlation value range that is classified as the correlation value below the complete judgment line and above the pass / fail judgment line, that is, the pass / fail judgment is passed, but when the presence of the disorder is found at a later date, the cause of the disorder can be investigated. It is a boundary determination range determined as boundary range determination in the correlation value range.
Further, the correlation value range that is classified as a failure determination line or lower is a correlation value range that cannot be directly passed to the next step of bookbinding, and is a failure determination range that is determined as a failure determination.

The boundary determination range will be described in further detail.
The boundary determination range is divided into two parts, a range having a relatively high correlation value and a range having a relatively low correlation value.
The boundary determination range is a correlation value range between the pass / fail determination line and the complete determination line, and since the pass / fail determination line is unchanged, the boundary determination range is a range that is affected in accordance with the change of the complete determination line.
That is, when the complete determination line is line A (correlation value 0.90), the correlation value range of the boundary determination range β is 0.75 ≦ β <0.90. β1 (0.875 ≦ β1 <0.90) and a relatively low correlation value range β2 (0.75 ≦ β2 <0.875), which are determined as boundary determination β1 and boundary determination β2. The
Similarly, the boundary determination ranges γ and δ of the complete determination line of line B (correlation value 0.925) and line C (correlation value 0.875) are also relatively high ranges (0.90 ≦ γ1). <0.925, 0.850 ≦ δ1 <0.875) and relatively low range (0.75 ≦ γ2 <0.90, 0.75 ≦ δ2 <0.850) It is determined as γ1, γ2, δ1, and δ2.

Next, the storage / save determination means for the image to be inspected will be described.
Generally, as a determination method for coincidence / non-coincidence, a method of determining from a correlation value is a well-known determination method. When the correlation value is 0.90 or more, it is well known that the determination range is not likely to be covered. Further, the correlation value varies depending on the paper thickness of the signature, the difference in the folding position, and the like. Is also a well-known matter.
Therefore, in the present invention, the determination that the pass determination is generally not likely to be overturned, that is, in the case of the complete determination, the presence of the disorder is found at a later date. Based on the knowledge that it is not necessary to store the image storage and the correlation value set as the complete determination line also varies due to the influence of the paper thickness or the like, the complete determination line is obtained as follows.
Sampling a predetermined number, for example, 1000, in the random inspection performed in the initial lot, using the well-known correlation value 0.90 as the complete determination line A and the correlation value 0.75 as the rejection determination line D. .
Among the samples, the total number of signatures to be inspected whose correlation value is less than or equal to the complete determination line is obtained as the total number of samplings, that is, a value obtained by dividing the number by 1000 as the correlation instability α, and the range of correlation instability ( 1.0 to 0.0) is divided into a plurality of ranges, and when the correlation instability α is 0.50 <α <0.70, the complete determination line is not changed, that is, the complete determination line A is set. When the correlation instability α is α ≦ 0.50, the correlation value of the complete determination line is changed to 0.875, that is, the complete determination line C is set, and the correlation instability α is α ≧ 0.70. In this case, the correlation value of the complete determination line is changed to 0.925, that is, the complete determination line B is set.

As described above, the correlation value range for complete determination changes depending on the degree of correlation instability, and the boundary determination range also changes in accordance with the change. Therefore, the division means can divide into multiple uniform or non-uniform divisions. The boundary determination range is the optimum division division.
Accordingly, since the determination rank corresponds to the optimum category, the check burden is reduced when checking the random order according to the determination rank.

  FIG. 5 is a diagram showing a display example of the determination result.

FIG. 5A is an inspection unit screen.
The display screen has a strip-shaped display field for each collating piece. From the top, the display field displays a system failure display such as a colling piece NO display part, a failed total bar graph display part, a failed total number display part, and a network failure. The inspection unit body display unit is set in order.
The inspection unit body display unit has a predetermined number of inspected signatures as one unit, for example, 10 inspected signatures as one inspection unit, and one inspection unit body is formed for each inspection unit. The unit bodies are sequentially displayed in layers every time one inspection unit is completed.
The inspection unit body is color-coded according to the determination.
The color coding corresponds to the lowest judgment among the judgments of the 10 inspected signatures when one inspection unit subjected to the random order inspection, for example, 10 inspected signatures as one inspection unit as described above. The inspection unit body is colored and displayed.
Therefore, when there is a failure determination even at 1 in one inspection unit, the inspection unit body is displayed in red (R). Similarly, when there is a determination of boundary determinations β1, γ1, δ1 even at 1, The unit body is colored and displayed in gray (G). Similarly, when the boundary determinations β2, γ2, and δ2 are present, the inspection unit body is colored and displayed in yellow (Y).
In addition, when all the determinations of one inspection unit subjected to random inspection, for example, 10 checked signatures are complete determinations, the inspection unit body is displayed in white (W).

In FIG. 5B, when one inspection unit body displayed on the inspection unit screen shown in FIG. 5A is clicked, operation information of a predetermined number of inspected signatures included in the inspection unit body is displayed. It is an inspection unit list screen displayed as a list.
The display operates from the left in the horizontal display column of the screen, from the left to the inspection date display section, inspection time display section, lot number, counter number display section, colored display determination result display section, etc. Information is displayed.
In the display, only appropriate information in the operation information may be displayed.

FIG. 5C is an inspection screen that is changed and displayed when the operation information of one signature is clicked in the inspection unit list display.
In the display, the inspection unit screen of FIG. 5-1 is displayed in the upper half of the screen, and the inspected image of the inspected signature clicked on the inspection unit list screen, the operation information screen, and the inspection are displayed in the lower half. Inspected images and operation information of other inspected signatures included in the unit body are displayed as a thumbnail screen.
In addition, on the image screen to be inspected, determination results and correlation values that are colored and displayed in colors (red, gray, yellow) corresponding to the determination are superimposed and displayed.

The display operation of the display means 30B will be described.
The display unit 30B displays an inspection unit screen (refer to FIG. 5-1) at the time of the random inspection, and sequentially displays the inspection unit bodies according to the progress of the signature inspection of the piece random inspection device. When 1 of the displayed inspection unit bodies is clicked, it is changed and displayed on the operation information list screen (see FIG. 5-2) included in the inspection unit body, and further displayed on the inspection unit list screen. When 1 of the operating information is clicked, it is linked so as to be changed and displayed on the inspection screen (FIG. 5-3).

The operation of the randomness inspection apparatus will be described with reference to FIG.
When the frame control means 22B detects the start signal from the starter 15 via the network and the I / O terminal 23, the frame control means 22B controls the CCD camera 21 to pick up the signature and draws the image to be inspected. A reference image stored in the storage unit 22A is retrieved, and a correlation value between the reference image and the captured image to be inspected is detected by a correlation value detection unit. The correlation value is a complete determination range, The correlation value category judgment means judges which category range is the boundary judgment range or the failure judgment range.
The piece control means 22B uses the determination result, the counter value of the counter 22C, the collation piece NO, the inspected image specifying information, etc. as the operation information by the operation information generation means, and the operation information and the inspected image are inspected. Each time or appropriately, the data is output to the main randomness checker 30 connected to the network via the I / O terminal 23.
On the other hand, the main CPU 30D of the main randomness inspection device 30 refers to the determination result included in the operation information received via the I / O terminal 30E, and does not store the received inspected image in the case of complete determination. Only the operation information is stored in the storage unit 30A, and if the determination is a determination other than the complete determination, the received operation information and the image to be inspected are stored in the storage unit 30A based on the storage / save determination unit.
Further, when the number of pieces of operation information corresponding to one inspection unit is received, as shown in FIG. 5A, the display unit 30B is updated and displayed by stacking the inspection unit bodies colored according to the determination result.
Further, when it is determined that there is a mess at a later date, the main control unit 30D displays on the display unit 30B when the bookbinding in which the typo is generated by the key operation of the input operation unit 30C is specified by, for example, the work date and time. When the inspection unit screen (see FIG. 5-1) is displayed and one of the inspection unit bodies displayed on the screen is clicked, the inspection unit body list screen (see FIG. 5-2) is displayed. When one operation information displayed on the screen is clicked, display control is performed so as to display an inspection screen (see FIG. 5-3).

Explain the cause of the disorder.
When investigating the cause, the collation piece NO can be identified from the page of random order. Therefore, the collation piece is identified, and among the inspection unit bodies displayed on the identified collation piece NO, the inspection unit body colored in red is not suitable. Since the acceptance determination is included, the boundary determination (β1, γ1, δ1) of the inspected signatures that are included in the inspection unit body that is colored in gray is the boundary included in the inspection unit body that is colored yellow. It is recognized that the reliability of the determination is higher than that of the determination (β2, γ2, δ2).
Therefore, the red inspection unit body displayed on the inspection unit body display screen in FIG. 5A is clicked, and then the unreliable yellow color displayed on the inspection unit list screen in FIG. Click the operation information including the judgment result.
As described above, since the operation information with low reliability can be checked, the number of images to be inspected can be reduced in the cause investigation work, and the burden on the cause investigation work is reduced.

The above embodiment has the following effects.
In other words, the complete judgment line is changed to the optimal correlation value according to the degree of correlation instability, so the boundary judgment range also fluctuates with the change, and it is checked when investigating the cause of the disorder that has been found to exist later. Since the boundary determination range becomes the optimal range, there is an effect that the work load is reduced.
In addition, by dividing the correlation value of the boundary determination range into two categories and increasing the boundary determination range, the determination rank is subdivided, so that the work load is further reduced when checking according to the determination rank Have
Further, since a predetermined number of signatures to be inspected are displayed on the inspection unit screen, and the display unit is displayed as an inspection unit body colored according to the determination result, even if the number of inspections is large, one display screen is displayed. In addition, since the inspection unit body is colored and the bar graph of the total number of rejects is also displayed, there is an effect that the occurrence state of disorder can be recognized at a glance.

As other implementation variations, the following may be used.
(1). In the previous embodiment, the correlation value of the pass / fail judgment line (D) of the present invention is 0.75, the complete judgment lines (A to C) are three, the number of divisions of the boundary judgment range (β1, γ1, δ1) is 2, The range is 0.50 and 0.25. Regarding these items, the paper thickness of the signature, the inspection image is a character, a pattern, the level of cross-correlation between adjacent signatures, the density difference, etc. In consideration of the fluctuation factors at the time of value detection, the number that can be changed and set as the complete judgment line, the correlation value range between each line in that case, the number of division of the boundary judgment range, and the correlation value range are uniform. Or, it may be appropriately changed such as non-uniformity.
Further, the determination of the correlation value of the determination line such as the complete determination line or the pass / fail determination line may be determined based on statistical processing of the sample, for example, standard deviation.
Then, there is an effect that the determination range to be divided can be optimally set according to the state of the signature.
(2). The sampling acquisition timing used for calculating the correlation instability may be performed periodically or at an appropriate timing at the time of performing the random inspection in the collating process.
Then, since the complete determination line is changed to the optimum correlation value periodically or at an appropriate timing, there is an effect that the reliability of the determination result of the inspected image is kept constant.

The collation process and the schematic block diagram of the disorder | damage | failure check apparatus arrange | positioned there. The block diagram of a random inspection system. The schematic block diagram of a piece control means. The schematic block diagram of a main control means. The figure which shows the example of an item memorize | stored as operation information. The figure which shows the example of a to-be-inspected image, a reference image, a determination line, a determination range, and a correlation value. The figure which shows the test | inspection unit screen which is 1 of the screens at the time of the random inspection execution displayed on a display means. The figure which shows the test | inspection unit body list screen which is 1 of the screens at the time of the random inspection execution displayed on a display means. The figure which shows the test | inspection screen which is 1 of the screens at the time of the disorderly check execution displayed on a display means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Collating machine 11 Folding storage means 12 Folding table 13 Rotating shaft 14 Drum 15 Starter 16 Drive part 17 Conveyance line 20 Piece disorder checker 21 CCD camera 22 Piece control part 22A Storage means 22B Piece control means 22C Counter 23 I / O terminal 30 Main irregularity checker 30A Storage means 30B Display means 30C Input operation means 30D Main control means 30E I / O terminal

Claims (6)

Imaging means for picking up a signature, inspected image storage means for storing an image of a signature imaged by the imaging means as an inspected image, and a correlation value detecting means for detecting a correlation value between the inspected image and a reference image ,
Classifying means for dividing the range of correlation values below the pass / fail judgment line, and dividing the correlation values above the line into a predetermined number, and what kind of classification the detected correlation value belongs to Correlation value category determination means for determining, determination result by the determination means, operation information generation means for generating operation information such as lot NO, counter value, collation piece NO, operation information storage means for storing the operation information, and the determination result Comprising display means for displaying operation information including the operation input means, and control means for controlling these means,
The control means collects a predetermined number of pieces of operation information of the inspected signature as one inspection unit, displays the inspection unit body as one inspection unit for each inspection unit, and displays the one inspection unit body in one inspection unit. Among the determinations present in the color, the color corresponding to the color determined to be the lowest correlation value classification, one inspection unit body is laminated each time one inspection unit is assembled, and displayed on the display means as an inspection unit screen, Further, when one of the inspection unit bodies displayed on the screen is clicked, the inspection unit body list screen displaying the operation information of the signature to be inspected included in the inspection unit body is displayed, and then displayed on the screen. When the operation information of the checked signature is clicked, it is displayed on the inspection screen.   The inspection unit screen according to claim 1 includes, for each collation piece, a collation piece NO display portion, a reject total number bar graph display portion, a failure total number display portion, a system failure display portion, an inspection unit in a strip-shaped display frame. An irregularity inspection device which is a screen whose display is controlled so that a body display unit is displayed.   The inspection screen according to claim 1, wherein the inspection unit screen is clicked on the upper half of the screen and the inspection unit list screen is clicked on the lower half, and the operation information screen of the inspected signature and the inspection image screen thereof And a random inspection apparatus in which a predetermined number of other operation information screens and image screens to be inspected are displayed on the display means as thumbnail screens.   4. The randomness inspection apparatus according to claim 3, wherein the inspection image screen is a screen on which the determination result colored and the correlation value are superimposed.   The control means according to claims 1 to 4 uses the correlation values between the predetermined number of images to be inspected and the reference image detected by the correlation value detection means as samples, and is a section below the complete determination line in the samples. And the total number of inspected signatures determined by the correlation value category determining means, and a value obtained by dividing the total number of inspected signatures by the number of samples is obtained as the correlation instability, and the correlation instability The correlation value set as the complete determination line is changed according to the size of the complete determination line to set a new complete determination line, and the correlation value between the line and the pass / fail determination line is set to a plurality of uniform or non-uniform values. Randomness inspection device that divides and classifies uniformly by sorting means.   6. The randomness inspection apparatus according to claim 1, wherein the timing of sampling performed by the arithmetic control means is an appropriate timing during an irregularity inspection or a periodic timing.

Images